Double-end blind hole, key groove and anti-theft buckle machining all-in-one machine of oil field perforating gun and machining method

Abstract

The invention discloses an all-in-one machine for double-end machining of blind holes, key grooves and anti-theft buckles of an oil field perforating gun and a machining method. The all-in-one machine comprises a machine tool, an electric control cabinet, a roller lifting system, a self-centering clamp, a main clamping mechanism, a starting end integrated machining mechanism and a tail end integrated machining mechanism, wherein the roller lifting system, the self-centering clamp, the main clamping mechanism, the starting end integrated machining mechanism and the tail end integrated machining mechanism are installed on the machine tool. A main chuck on the main clamping mechanism moves in the longitudinal direction of the machine tool and is used for pushing the oil field perforating gun to be positioned and clamping and rotating the oil field perforating gun. A milling cutter assembly, a blind hole machining machine and an anti-theft buckle machining machine are sequentially arranged on the starting end integrated machining mechanism from inside to outside. The tail end integrated machining mechanism is sequentially provided with an anti-theft buckle machining machine, a blind hole machining machine, a milling cutter assembly and a pipe length measuring assembly from inside to outside. All the components are ingeniously combined and reasonably arranged and matched for use, integrated machining of double-end blind holes, key grooves and anti-theft buckles of the oil field perforating gun is achieved, synchronous operation of equipment at the starting end and equipment at the tail end is achieved, and the machining efficiency is improved due to simultaneous machining of the double ends while the machining precision is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of machining, and in particular relates to an integrated machine and a machining method for a double-headed oilfield perforating gun for machining blind holes, keyways and anti-theft buckles. Background Art

[0002] During the oil production process, precise blasting with an oilfield perforating gun creates a flow channel between the reservoir and the wellbore, allowing oil and gas to flow smoothly into the well. After drilling is completed and the oilfield perforating gun reaches the designated position, a signal is sent from the ground control device to detonate the perforating charge. The explosion of the perforating charge generates a high-temperature, high-pressure jet that instantly penetrates the casing, cement sheath, and some of the reservoir rock, creating a channel with a diameter of several to tens of millimeters, allowing oil and gas in the reservoir to flow into the well through the channel. After perforation is completed, the perforating gun must be pulled out of the wellhead. Subsequent stimulation operations such as fracturing and acidizing can be carried out directly to expand the seepage channel, and the Christmas tree can be installed to begin oil production.

[0003] Existing oilfield perforating guns are made of iron, generally in the form of a slender round tube. Blind holes need to be machined on the outer tube wall of the oilfield perforating gun, and a keyway needs to be machined on at least one end of the inner tube wall. The end of the oilfield perforating gun may or may not be machined with an anti-theft buckle according to actual needs. The main functions of the blind hole, keyway, and anti-theft buckle are as follows:

[0004] (1) The main functions of blind hole processing by oil field perforating guns are as follows:

[0005] Increasing the burst height and improving penetration depth: According to perforating charge detonation theory, when the burst height of a perforating charge is less than the ideal burst height, increasing the burst height can significantly increase penetration depth. Injecting internal blind holes into the inner wall or external blind holes into the outer wall can increase the burst height of the perforating charge within the gun. This allows the shaped charge jet generated after the detonation of the perforating charge more space to expand, reducing premature obstructions and allowing the charge's focused energy to fully unleash, thereby increasing the penetration depth of the perforator.

[0006] ——Protective casing: The external blind hole of the external blind hole type oilfield perforating gun is opened on the outer surface of the gun body. After perforating, a hole is punched at the bottom of the blind hole and it does not fall off. The setting of the external blind hole can reduce the damage to the casing caused by burrs on the gun body after perforating.

[0007] Currently, oilfield perforating guns face stringent requirements for blind hole dimensional accuracy, positional accuracy, and depth precision. Dimensional accuracy impacts the installation and perforating performance of perforating charges. Positional accuracy deviations can lead to inaccurate perforating directions. Improper depth control prevents the perforating charge from detonating at the ideal height, reducing penetration depth.

[0008] (2) The key grooves on the inner wall of oil field perforating guns have the following functions:

[0009] ——Positioning and installation: used to install positioning plates, bullet holders and other components to ensure their accurate position and installation accuracy in the oilfield perforating gun, prevent them from shifting or rotating during the perforating process, thereby ensuring the alignment accuracy of the perforating bullet and the blind hole of the oilfield perforating gun, so that the perforating bullet can accurately pass through the blind hole and be fired into the target formation.

[0010] ——Easy to disassemble: For example, in some oil field perforating gun structures, keyways and pins are used to cooperate. When installing the positioning plate, the pin head is compressed into the keyway and embedded into the pin hole to complete the positioning. When disassembling, a tool is inserted into the pin hole to compress the pin head and the positioning plate can be removed, making the installation and removal of the positioning plate simple and quick.

[0011] - Improved connection stability: For multiple oilfield perforating gun bodies that need to be connected to each other, the keyway can cooperate with other connecting components to improve the stability and coaxiality of the connection between the gun bodies, ensure the reliability of the overall structure of the oilfield perforating gun, and be able to withstand the impact force generated by the explosion of the perforating charge during the perforating operation without deformation or damage.

[0012] (3) The anti-theft buckle processed at the end of the oil field perforating gun has the following main functions:

[0013] Preventing accidental back-out: Oilfield perforating guns are subject to a variety of external forces during downhole operations, including vibration, swaying, and rotation. Without reliable anti-back-out measures, back-out can easily occur, leading to the separation of gun components or even falling to the bottom of the well, causing serious safety accidents and economic losses. The anti-theft buckle utilizes a special structural design, such as a mating male and female joint structure, back-out grooves, and set screws, to effectively prevent threads from loosening and back-out under external forces.

[0014] Easier connection and positioning: The anti-theft buckle structure allows for more accurate and convenient connection of the various components of an oilfield perforating gun. For example, the design of the male and female connectors ensures coaxiality, allowing the gun to maintain excellent straightness during assembly and downhole operation, facilitating smooth perforating operations. Furthermore, some anti-theft buckles also feature a positioning function, ensuring the precise relative positioning of the various components of the oilfield perforating gun, thereby improving perforating accuracy and effectiveness.

[0015] - Improved sealing: During perforating operations, a certain pressure and sealing must be maintained inside the oilfield perforating gun to ensure the normal detonation of the perforating bullet and the perforating effect. The anti-theft buckle design can provide better sealing performance at the connection part, preventing substances such as well fluid from entering the oilfield perforating gun and affecting the safety and reliability of the perforating operation. For example, by setting sealing elements such as sealing rings at the joints and using them in conjunction with the anti-theft buckle structure, the sealing performance of the oilfield perforating gun can be effectively improved.

[0016] Existing oilfield perforating guns are available in two types: single-head processing for blind holes, keyways, and anti-theft detents, and dual-head processing for these purposes. These processes require three pieces of equipment: a blind hole machine for the oilfield perforating gun, a keyway processing machine, and a tapping machine for the anti-theft detent. This means that existing oilfield perforating guns require three separate pieces of equipment for processing, rather than a single piece of equipment. This is primarily due to significant process differences. If these processes were to be completed on a single piece of equipment, efficient collaboration would be required, making functional integration and layout difficult. For example, an all-in-one machine must integrate multiple processing functions for processing blind holes, keyways, and anti-theft detents. These functions must coordinate and avoid interference, while also meeting the precision and efficiency requirements of the various processing tasks. Regarding spatial layout, compactly and rationally arranging multiple processing modules within a limited space is a challenge. This requires comprehensive consideration of the size, shape, and range of motion of each module, as well as the space requirements for clamping, conveying, and chip removal within the perforating gun to ensure convenient operation and maintenance. Therefore, at present, the oilfield perforating guns with a single head for processing blind holes, keyways, and anti-theft buckles have not yet achieved integrated processing. It is even more difficult to achieve integrated processing for the oilfield perforating guns with double heads for processing blind holes, keyways, and anti-theft buckles. This also leads to a series of problems such as lower processing efficiency of the oilfield perforating guns with double heads for processing blind holes, keyways, and anti-theft buckles, and the back-and-forth processing of the two heads and the multiple clamping of the three processes affect the processing accuracy, making it difficult to reduce production costs. Summary of the Invention

[0017] In view of the above technical problems and shortcomings, the present invention provides an all-in-one machine for double-headed processing of blind holes, keyways and anti-theft buckles of oilfield perforating guns. The all-in-one machine realizes the integrated design of double-headed processing of blind holes, keyways and anti-theft buckles of oilfield perforating guns through the ingenious combination and reasonable layout of various components. The processing equipment at both ends of the all-in-one machine is carried out synchronously, which significantly improves the processing efficiency. At the same time, the dimensional accuracy, positional accuracy and depth accuracy of the blind holes, the dimensional accuracy (such as groove width and groove depth) and positional accuracy (such as the phase angle with the blind hole at the head end and the distance to the end face) of the keyways, and the positional accuracy of the anti-theft buckles are guaranteed. This solves the current technical problem that integrated processing cannot be achieved because the pipe body is too long and bends during transportation and storage. During the punching, tapping, blind hole processing or keyway processing, the oilfield perforating gun will be difficult to clamp due to the bending, and the processing process will vibrate or rotate due to force. Multiple clamping makes it impossible to guarantee the processing accuracy.

[0018] To achieve the above object, the present invention adopts the following technical solutions:

[0019] An all-in-one machine for processing blind holes, keyways, and anti-theft buckles on a double-ended oilfield perforating gun, comprising a machine tool, an electric control cabinet, a chip removal structure arranged side by side with the machine tool, a roller lifting system, a self-centering fixture, a main clamping mechanism, a starting end integrated processing mechanism, and a terminal end integrated processing mechanism installed on the machine tool;

[0020] Among them, one side of the machine tool is a frame structure for supporting, the top surface of the frame structure is provided with two parallel slide rails, and the frame structure is provided with a rack near the outer slide rails; the other side of the machine tool is a trapezoidal groove structure, the bottom surface of the trapezoidal groove structure is an inclined surface; the roller lifting system and the self-centering clamp are installed in the trapezoidal groove structure of the machine tool, and the roller lifting system is used to automatically lift and lower when replacing the oilfield perforating gun, adjust the position of the center of the oilfield perforating gun barrel body, so that the center of the oilfield perforating gun barrel body is concentric with the main chuck of the main clamping mechanism at the end of the machine tool; the self-centering clamp is provided in multiple numbers, and is used to clamp the oilfield perforating gun; the main chuck on the main clamping mechanism can move back and forth along the longitudinal direction of the machine tool to push the oilfield perforating gun for positioning, and can also clamp the end of the oilfield perforating gun barrel body, drive the oilfield perforating gun to rotate 360°, and ensure the processing of blind holes in different phases of the oilfield perforating gun barrel body.

[0021] The starting end integrated processing mechanism and the end end integrated processing mechanism are arranged on the slide rail of the machine tool and are respectively arranged near the two ends of the machine tool. The starting end integrated processing mechanism is provided with a milling cutter assembly, a blind hole processing machine, and an anti-theft buckle processing machine in sequence from the inside to the outside; the end end integrated processing mechanism is provided with an anti-theft buckle processing machine, a blind hole processing machine, a milling cutter assembly, and a pipe length measuring assembly in sequence from the inside to the outside; the keyway milling cutter on the milling cutter assembly can rotate and move along the Z direction, and can also move forward and backward along the longitudinal direction of the machine tool, and it faces one side of the oil field perforating gun, and is used to extend from the end into the interior of the oil field perforating gun barrel body, and perforate the oil field A keyway is processed on the inner wall of the gun, and a measuring ruler is provided on the milling cutter assembly near the keyway milling cutter to ensure the processing depth of the keyway; the blind hole drill and double-head tapping machine on the blind hole processing machine and the anti-theft buckle processing machine can rotate and move along the Z direction, and can also move back and forth along the longitudinal direction of the machine tool. The blind hole is processed by the blind hole drill chip cutting, and the anti-theft buckle is processed by the double-head tapping machine. The blind hole processing machine is provided with a blind hole measuring ruler assembly to ensure the processing depth of the blind hole; the electric control cabinet adopts a high-speed dual-channel CNC system for synchronously controlling the actions of the starting end integrated processing mechanism and the end end integrated processing mechanism, and controlling the actions of other mechanisms at the same time.

[0022] As a preferred embodiment of the present invention, a protective plate is provided on the outer side of the chip removal structure; two parallel short slide rails are provided at the end of the machine tool at the position where the main clamping mechanism is installed, and the main clamping mechanism includes a sliding seat installed on the short slide rail and capable of sliding relative to the short slide rail, a driving motor for driving the sliding seat, and a hydraulic rotary chuck installed on the sliding seat; the hydraulic rotary chuck includes a main chuck, a clamping mechanism and a rotating mechanism;

[0023] The roller lifting system includes a plurality of roller lifting mechanisms connected in series through a connecting rod and a lifting drive mechanism. The lifting drive mechanism is installed at the end of the machine tool and is used to simultaneously drive the plurality of roller lifting mechanisms connected in series to perform lifting actions.

[0024] As a preferred embodiment of the present invention, the self-centering fixture includes a second base, a base, a long rack seat and a long rack arranged in the base, a dovetail seat arranged on the base, a left dovetail slide and a right dovetail slide arranged on the dovetail seat, a left clamping claw and a right clamping claw arranged on the left dovetail slide and the right dovetail slide, a short rack arranged above the long rack and installed at the bottom of the right dovetail slide, and a gear meshed with the long rack and the short rack and installed in the base; wherein, a driving mechanism is installed at one end of the base, and the top surface of the base is provided with a A dovetail seat is provided, and flange bearing seats are provided on both sides of the base at a position away from the driving mechanism; the driving rod of the driving mechanism extends into the base, and the end is fixedly connected to the long rack seat; the end face of the long rack seat is fixedly connected to the long rack, and the top surface is fixedly connected to the left dovetail slide through a linkage block; the left dovetail slide and the right dovetail slide are arranged on the dovetail slide rail of the dovetail seat and move away from or towards each other relative to the dovetail slide rail; the gear is installed on the flange bearing seats on both sides of the base, the upper end is engaged with the short rack, and the lower end is engaged with the long rack.

[0025] As a preferred embodiment of the present invention, the starting end integrated processing mechanism includes a first slide mounted on the slide rail and sliding back and forth relative to the slide rail, a first gear arranged at the bottom of the first slide and meshing with the rack, a first reducer for driving the first gear to rotate, a first support frame mounted on the first slide, a first Z-direction driving mechanism mounted on the first support frame, a first sliding table moving along the Z direction relative to the first support frame, a blind hole processing machine mounted on the first sliding table, an anti-theft buckle processing machine mounted on the outer side wall of the first support frame, a first auxiliary bracket arranged on the inner side wall of the first support frame, a second Z-direction driving mechanism mounted on the first auxiliary bracket, a second sliding table moving along the Z direction relative to the first auxiliary bracket, and a milling cutter assembly mounted on the second sliding table;

[0026] The end-integrated processing mechanism includes a second slide mounted on the slide rail and sliding back and forth relative to the slide rail, a second gear arranged at the bottom of the second slide and meshing with the rack, a second reducer for driving the second gear to rotate, a second support frame mounted on the second slide, a third Z-direction driving mechanism mounted on the second support frame, a third sliding platform that moves along the Z direction relative to the second support frame, a blind hole processing machine mounted on the third sliding platform, an anti-theft buckle processing machine mounted on the inner side wall of the second support frame, a second auxiliary bracket arranged on the outer side wall of the second support frame, a fourth Z-direction driving mechanism mounted on the second auxiliary bracket, a fourth sliding platform that moves along the Z direction relative to the second auxiliary bracket, a milling cutter assembly mounted on the fourth sliding platform, and a pipe length measuring ruler assembly mounted on the outer side of the second auxiliary bracket;

[0027] The milling cutter assembly includes a first spindle motor and a keyway fixing seat fixed on the sliding table, a pinion assembly installed on the keyway fixing seat, and a keyway milling cutter installed on the pinion assembly. The first spindle motor is connected to the transmission shaft on the pinion assembly through a coupling and a connecting shaft, and the connecting shaft is hidden in the keyway fixing seat; the blind hole processing machine includes a blind hole power head and a telescopic dust cover installed on the blind hole power head.

[0028] As a further preference of the present invention, the base of the self-centering clamp is a frame structure, side guards are provided on both sides of the base, and end guards are provided on the ends; the driving mechanism is an oil cylinder or an air cylinder, and the piston rod of the oil cylinder or the cylinder is fixedly connected to the long rack seat; the long rack seat is a frame structure, and the linkage block and the long rack seat are an integrated structure; the left dovetail slide plate and the right dovetail slide plate are respectively provided with a left claw seat and a right claw seat, and the left claw seat and the right claw seat are arranged opposite to each other, and the left claw seat is provided with a left claw, and the right claw seat is provided with a right claw, and the left claw and the right claw move synchronously toward each other for clamping the perforating gun.

[0029] As a further preferred embodiment of the present invention, an optical axis is provided at the axis center of the gear of the self-centering fixture, and both ends of the optical axis are mounted on bearings in the flange bearing seat; an avoidance area is provided in the middle of the dovetail slide rail on the dovetail seat, and the linkage block on the top surface of the long rack seat passes through the avoidance area of ​​the dovetail slide rail and is fixedly connected to the left dovetail slide plate; the short rack is fixed to the bottom of the right dovetail slide plate, and passes through the avoidance area of ​​the dovetail slide rail to engage with the upper end of the gear;

[0030] The left and right jaw holders of the self-centering clamp are provided with oil cups, and the oil outlets of the oil cups are connected with the oil channels on the left and right dovetail slides, so that the oil in the oil cups seeps into the space between the dovetail slide rail and the dovetail slot through the oil channels, thereby lubricating the dovetail slide rail. A nut is provided at the end of the dovetail seat, and a limit screw passes through the nut and extends into the avoidance area of ​​the dovetail slide rail. The limit screw cooperates with the linkage block on the long rack seat to limit the maximum stroke of the clamp.

[0031] As a further preference of the present invention, the pinion assembly of the milling cutter assembly includes a lower cover, an upper cover, and a plurality of pinions arranged between the upper cover and the lower cover; wherein, the lower cover is provided with a plurality of bearings, the bearing at the starting end is provided with a transmission shaft connected to the connecting shaft, the transmission shaft is provided with a starting pinion, the middle bearings are all mounted with shafts and the shafts are provided with intermediate pinions, the end bearings are mounted with shafts and the shafts are provided with end pinions, the starting pinion is meshed with the intermediate pinions, the adjacent intermediate pinions are meshed with each other, the last intermediate pinion is meshed with the end pinion, and the end pinion rotates coaxially with the keyway milling cutter at the upper end of the shaft; the upper cover is at a position opposite to the starting pinion and the end pinion An avoidance hole is provided, and a transmission shaft connected to the starting pinion and rotating coaxially passes through the avoidance hole and is connected to the connecting shaft through a coupling. The keyway milling cutter passes through the avoidance hole to expose the outside of the upper cover. A plurality of bearings are provided on the upper cover at a position opposite to the intermediate pinion, and the upper end of the shaft connected to the intermediate pinion is connected to the bearing in the upper cover; the shaft connected to the keyway milling cutter is also provided with a bearing at the connection with the upper cover; a measuring ruler is also provided on the lower cover near the end pinion, and the measuring ruler is used to measure the inner wall of the oilfield perforating gun. When the measuring ruler contacts the inner wall of the oilfield perforating gun, the control system on the electric control cabinet records this coordinate position as the zero point, and the pinion assembly is fixed to the bottom of the keyway fixing seat through the lower hoop.

[0032] As a further preferred embodiment of the present invention, the telescopic dust cover is used to cover the position of the blind hole drill bit, and includes an upper cover and a lower cover. The upper cover is fixed to the blind hole power head, and the upper cover is arranged inside the lower cover. The upper cover and the lower cover are connected by four guide rods with limit portions at both ends, and the guide rods are provided with a first compression spring so that the lower cover can be telescopic relative to the upper cover. The lower cover includes a cover body and a cover door hinged to the cover body. When the cover door is closed, it forms a closed structure with the cover body. The position where the cover body contacts the wall of the oil field perforating gun barrel is an arc structure.

[0033] A balancing cylinder nitrogen storage tank is installed on the first support frame and the second support frame on the side opposite to the blind hole processing machine. A balancing cylinder is also installed on the first support frame and the second support frame. The cylinder body of the balancing cylinder is fixed on the top of the support frame, and the end of the telescopic rod of the balancing cylinder is connected to the sliding table on which the blind hole processing machine is installed, so as to provide an upward pulling force to balance the downward gravity of the blind hole power head.

[0034] As a further preference of the present invention, the blind hole ruler assembly is installed on a long connecting plate, and the long connecting plate is fixed on the side of the blind hole processing machine. The blind hole ruler assembly includes a telescopic rod on the same line as the blind hole drill bit, and the upper end of the telescopic rod is fixed on the long connecting plate, and the telescopic part of the telescopic rod is connected to the reference block. A second compression spring is provided between the reference block and the fixed part of the telescopic rod. A displacement sensor is provided on the long connecting plate near the reference block, and the blind hole processing depth is accurately recorded by the displacement sensor. The lower end of the telescopic part of the telescopic rod is installed on the long connecting plate through a guide seat.

[0035] As a further preference of the present invention, the pipe length measuring ruler assembly is installed on the outside of the second auxiliary bracket through a connecting plate, and a three-axis three-rod adjustable stroke cylinder is provided on the connecting plate, and the telescopic end of the three-axis three-rod adjustable stroke cylinder is connected to the end face measuring mechanism of the oilfield perforating gun barrel body, and the end face measuring mechanism includes a movable end plate for contacting the end face of the oilfield perforating gun barrel body and capable of moving longitudinally along the oilfield perforating gun, and a limit switch is provided on the other side of the movable end plate, and the movable end plate is fixed on the optical axis, and the optical axis can move longitudinally along the oilfield perforating gun through a linear bearing installed on the vertical plate. When the pipe length measuring ruler assembly contacts the end face of the oilfield perforating gun barrel body and continues to drive the movable end plate to move along the linear bearing until it contacts the limit switch, the limit switch feeds back a signal to the numerical control system, and the numerical control system records the current coordinates and determines the length of the oilfield perforating gun through data conversion processing.

[0036] The present invention also provides a method for processing blind holes, keyways, and anti-theft buckles on a double-ended oilfield perforating gun, comprising the following steps:

[0037] Step 1. The oilfield perforating gun to be processed is placed on the roller lifting system using the suction cup assembly of the automatic truss loading and unloading system. The roller lifting system automatically adjusts the center height of the oilfield perforating gun according to the diameter of the oilfield perforating gun, so that the center of the oilfield perforating gun barrel is concentric with the main chuck of the main clamping mechanism at the end of the machine tool;

[0038] Step 2. Control the main chuck on the main clamping mechanism to move longitudinally along the machine tool to push the oilfield perforating gun for positioning so that the starting end face of the oilfield perforating gun is aligned with the zero point position of the machine tool;

[0039] Step 3. Control the self-centering clamp to clamp the pipe body of the oilfield perforating gun;

[0040] Step 4. Control the end-stage integrated processing mechanism to move longitudinally along the machine tool. When the tube length measuring scale assembly is located outside the end surface of the oilfield perforating gun barrel, control the three-axis three-rod adjustable stroke cylinder of the tube length measuring scale assembly to actuate so that the end surface measuring mechanism can contact the oilfield perforating gun. Then, control the end-stage integrated processing mechanism to move toward the oilfield perforating gun. When the end surface measuring mechanism contacts the end surface of the oilfield perforating gun barrel and triggers the limit switch, the length of the oilfield perforating gun is recorded according to the pre-calibrated dimensions on the machine tool. Finally, control the tube length measuring scale assembly to move away from the end surface of the oilfield perforating gun barrel.

[0041] Step 5. Synchronously control the starting and ending integrated processing mechanisms to activate the milling cutter assemblies on the starting and ending integrated processing mechanisms. The starting and ending milling cutter assemblies are synchronously extended into the oilfield perforating gun. When the measuring ruler contacts the inner wall of the oilfield perforating gun, the keyway milling cutter is controlled to operate according to the processing depth to complete the keyway processing. After the keyway processing at both ends is completed, the starting and ending integrated processing mechanisms exit and return to their original positions.

[0042] Step 6. Continue to synchronously control the starting end integrated processing mechanism and the end end integrated processing mechanism to move along the longitudinal direction of the machine tool. The anti-theft buckle processing machines at the starting end and the end end simultaneously process the anti-theft buckle. During the anti-theft buckle processing, drilling is performed first and then tapping. After the anti-theft buckle processing at both ends of the oilfield perforating gun barrel is completed, the anti-theft buckle processing machines are controlled to return to their original positions.

[0043] Step 7. Synchronously control the blind hole processing machines at the starting and ending ends to process the blind holes simultaneously. The blind hole processing machine at the starting end starts processing at the starting end of the oilfield perforating gun barrel body, while the blind hole processing machine at the ending end starts processing at the ending end of the oilfield perforating gun barrel body. After processing one phase (one row) of blind holes, the self-centering fixture returns to its original position, and then the main clamping mechanism is controlled to clamp and rotate the oilfield perforating gun to process the blind holes of another phase. After all phases of blind holes are processed, the self-centering fixture returns to its original position, and the processed oilfield perforating gun can be removed using the suction cup assembly.

[0044] Advantages and beneficial effects of the present invention:

[0045] (1) The all-in-one machine provided by the present invention realizes the integrated processing of double-headed blind holes, keyways and anti-theft buckles of oilfield perforating guns. During processing, the equipment at the starting end and the end end operate synchronously. Since the two heads are processed at the same time, the processing efficiency of double-headed blind holes, keyways and anti-theft buckles of oilfield perforating guns is greatly improved.

[0046] (2) The present invention can complete the processing of double-headed blind holes, keyways and anti-theft buckles of oilfield perforating guns on a single device, reducing the number of times the perforating gun is carried and clamped between different devices, saving processing time; at the same time, through the dual-channel synchronous control of the CNC system, the processing speed is significantly improved while achieving automated processing.

[0047] (3) The all-in-one machine provided by the present invention adopts numerical control technology and precise transmission devices. Through the ingenious combination and reasonable use of various components, it can ensure the processing accuracy of double-headed blind holes, keyways and anti-theft buckles; for example: the depth of blind holes and keyways is precisely controlled by a contact sensing mechanism, and the accuracy of the tail blind hole and the tail anti-theft buckle to the end face is ensured by accurately measuring the pipe length. The perforating gun is effectively clamped by a self-centering fixture to avoid processing position deviation caused by shaking during the processing.

[0048] (4) The all-in-one machine provided by the present invention has a self-centering hydraulic clamp with adjustable stroke and a roller automatic lifting system. Multiple sets of hydraulic clamps are self-centering and have adjustable strokes, and multiple sets of support wheels (rollers) are CNC-controlled and automatically adjust the height, which can meet the processing requirements of oil field perforating guns of different diameters and lengths (processing range: diameter 45-178mm, length 300-6600mm), and has a wide range of applications.

[0049] (5) The fully automatic parameterized design of the all-in-one CNC machine provided by the present invention allows the operator to simply input the relevant processing parameters, and the equipment will automatically complete the processing process, reducing the complexity and labor intensity of manual operation. At the same time, automated processing also reduces the impact of human factors on processing quality.

[0050] (6) The all-in-one machine provided by the present invention integrates multiple processing functions, reducing the equipment purchase cost and floor space. In addition, due to the improved processing efficiency and stable processing quality, the scrap rate in the production process can be reduced, further reducing production costs.

[0051] (7) The telescopic protective cover provided in the blind hole power head processing area of ​​the integrated machine provided by the present invention can prevent chips from splashing, and the iron chips generated during the equipment processing can be processed centrally, thereby improving the processing environment and being beneficial to the safety and health of the operators.

[0052] (8) When the oilfield perforating gun is clamped, it is necessary to ensure that its axis coincides with the main shaft axis of the processing equipment, otherwise the blind hole processing position will deviate; and during the processing, it is also necessary to prevent the oilfield perforating gun from displacement or vibration due to force, which affects the processing accuracy. However, due to its structural characteristics (slender round tube structure), it is difficult to achieve stable clamping and precise positioning. To solve this problem, the present invention independently designs a self-centering hydraulic clamp to solve this problem; in addition, to ensure the depth of the blind hole, the present invention provides a blind hole ruler assembly for measuring the hole depth. To ensure the linear accuracy of the blind hole, the present invention provides a pipe length ruler assembly for measuring the pipe length, which effectively ensures the processing accuracy of the blind hole on the all-in-one machine.

[0053] (9) The self-centering fixture provided by the present invention is designed with a frame-type base and a long rack seat. By cleverly installing the long rack, short rack, gear, and linkage block, a synchronous centering structure with a simple structure and compact installation is formed. The synchronous centering structure provides a uniform and controllable clamping force through the hydraulic system, which can ensure the synchronous movement of the two clamping claws, and can automatically center the perforating gun to ensure the accurate position of the perforating gun in the fixture. Its centering accuracy can reach 0.04-0.05mm, which meets the requirements of high-precision processing, avoids the shape and position tolerance caused by clamping deviation, and ensures processing consistency.

[0054] (10) The self-centering clamp provided by the present invention has a linear movement stroke of up to several meters, and the centering accuracy will not be affected when the stroke is increased; in addition, the stroke range can be adjusted by adjusting the length of the limit screw extending into the dovetail seat (the clamping range can be automatically adjusted according to the size of different perforating guns), and the adaptability is strong; the clamping can achieve rapid clamping and adjustment. When adjusting the stroke, the operator can quickly adapt to different perforating gun thicknesses through simple operations (adjusting the limit screw), without the need to frequently replace the clamping jaws or perform complex adjustments. The operation is simple, and the clamping time is greatly shortened. It increases the flexibility of the equipment while improving production efficiency.

[0055] (11) The self-centering clamp provided by the present invention can be protected because the driving components are arranged in the base, that is, protective plates are arranged on the side and end faces of the base, and its normal use will not be affected by iron filings generated during the processing. The overall structure of the clamp is simple, the installation is compact, the number of parts is small, and standardized gear rack transmission is used, so the material and processing costs are low. In addition, the simple structure means fewer moving parts, so the clamp has a lower probability of wear and failure, is more stable, and has higher reliability.

[0056] (12) The roller lifting system on the integrated machine provided by the present invention includes multiple roller lifting mechanisms in series (more than 6 roller lifting mechanisms can be connected in series). Multiple roller lifting mechanisms in series share a lifting drive mechanism (power source), which can match pipes of different lengths, and a protective cover is provided at the transmission part to prevent iron chips from splashing and affecting the operation of the system.

[0057] (13) The keyway processing mechanism on the integrated machine provided by the present invention adopts gear transmission. The spindle motor is connected to the pinion assembly through a coupling and a connecting rod. Multiple pinion wheels drive the keyway milling cutter to rotate in turn to realize the processing of the keyway. This structural design has stable operation and large torque. Compared with the belt drive, it has a stable and fast speed. In addition, a ruler is also provided at the end of the pinion assembly. The ruler is inserted into the pipe to measure the pipe wall and perform positioning, thereby ensuring the processing depth and solving the problem of uneven keyway depth caused by inconsistent pipe wall thickness.

[0058] (14) The present invention provides a balance cylinder nitrogen storage tank and a balance cylinder on the blind hole and anti-theft buckle processing mechanism to balance the downward force of the power head. This design can enable the power head to move downward quickly, thereby improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0060] Figure 1 The overall structure of the integrated machine provided by the present invention is schematically shown Figure 1 ;

[0061] Figure 2 The overall structure of the integrated machine provided by the present invention is schematically shown Figure 2 ;

[0062] Figure 3 For the present invention Figure 1 A magnified view of the installation position of the middle main clamp mechanism;

[0063] Figure 4 For the present invention Figure 1 Enlarged view of the middle roller lifting system and the self-centering fixture installation location;

[0064] Figure 5 A schematic diagram of the overall structure of the roller lifting mechanism provided by the present invention;

[0065] Figure 6 Schematic diagram of the overall structure of the self-centering fixture provided by the present invention Figure 1 ;

[0066] Figure 7 Schematic diagram of the overall structure of the self-centering fixture provided by the present invention Figure 2 ;

[0067] Figure 8 Schematic diagram of the overall structure of the self-centering fixture (hidden guard plate) provided by the present invention Figure 1 ;

[0068] Figure 9 Schematic diagram of the overall structure of the self-centering fixture (hidden guard plate) provided by the present invention Figure 2 ;

[0069] Figure 10 A top view of the self-centering fixture provided by the present invention;

[0070] Figure 11 For the present invention Figure 10 Cross-section of the middle AA;

[0071] Figure 12 This is a schematic diagram of the overall structure of the self-centering fixture (with hidden base and guard plate) provided by the present invention;

[0072] Figure 13 The overall structure of the integrated processing mechanism at the starting end of the present invention is shown in FIG. Figure 1 ;

[0073] Figure 14 The overall structure of the integrated processing mechanism at the starting end of the present invention is shown in FIG. Figure 2 ;

[0074] Figure 15 It is a plan view of the integrated processing mechanism of the starting end of the present invention;

[0075] Figure 16 The overall structure of the terminal integrated processing mechanism of the present invention is shown in FIG. Figure 1 ;

[0076] Figure 17 The overall structure of the terminal integrated processing mechanism of the present invention is shown in FIG. Figure 2 ;

[0077] Figure 18 It is a plan view of the integrated end processing mechanism of the present invention;

[0078] Figure 19 A partial enlarged view of the milling cutter assembly of the present invention;

[0079] Figure 20 A schematic diagram of a measuring ruler installed on a hidden cover of a milling cutter assembly according to the present invention;

[0080] Figure numerals: machine tool A, electric control cabinet B, chip removal structure C, roller lifting system D, self-centering fixture E, main clamping mechanism F, starting end integrated processing mechanism G, end end integrated processing mechanism H, oil field perforating gun I; frame structure a1, slide rail a2, rack a3, trapezoidal groove structure a4, short slide rail a5; roller lifting mechanism d1, lifting drive mechanism d2, first base d11, turbine screw lift d12, roller structure d13, protective cover d14; second base e1, base e2, long rack seat e3, long rack e4, dovetail seat e5, left dovetail slide e6, right dovetail slide e7, left clamping jaw holder e8, right clamping jaw holder e9, left clamping jaw e10, right clamping jaw e11, short rack e12, gear e13, drive mechanism e14, flange bearing seat e15, linkage block e16, side guard plate e17, end guard plate e18, oil cup e19, limit screw e20, dovetail slide rail e51, drive rod e141, avoidance area e511; sliding seat f1, drive motor f2, hydraulic rotary chuck f3, main chuck f31, clamping mechanism f32, rotating mechanism f33; first slide g1, first gear g2, first reducer g3, first support frame g4, First Z-direction drive mechanism g5, first sliding platform g6, first auxiliary bracket g7, second Z-direction drive mechanism g8, second sliding platform g9, first lubricating cotton wheel g10, lubricating cotton wheel adjustment plate g11; second slide plate h1, second gear h2, second reducer h3, second support frame h4, third Z-direction drive mechanism h5, third sliding platform h6, second auxiliary bracket h7, fourth Z-direction drive mechanism h8, fourth sliding platform h9; milling cutter assembly 1, blind hole processing machine 2, anti-theft buckle processing machine 3, pipe length measuring ruler assembly 4, measuring ruler 6, blind hole measuring ruler assembly 5, balance cylinder nitrogen storage tank 7, Balancing cylinder 8; first spindle motor 11, keyway fixing seat 12, pinion assembly 13, keyway milling cutter 14, lower hoop 15, lower cover 131, upper cover 132, transmission shaft 133; blind hole power head 21, telescopic dust cover 22, second spindle motor 211, knife cylinder 212, upper cover 221, lower cover 222, guide rod 223, first compression spring 224; double-head tapping machine 31, third spindle motor 32, servo motor 33; cylinder 41, end face measuring mechanism 42; telescopic rod 51, reference block 52, second compression spring 53, displacement sensor 54, guide seat 55. DETAILED DESCRIPTION

[0081] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0082] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0083] like Figures 1 to 4 As shown, this embodiment provides an all-in-one machine for processing blind holes, keyways, and anti-theft buckles with a double head for an oilfield perforating gun. The all-in-one machine is based on a previously designed single-head all-in-one machine for processing blind holes, keyways, and anti-theft buckles, and is obtained by improving and upgrading the single-head processing all-in-one machine, thereby enabling double-head processing of blind holes, keyways, and anti-theft buckles with an oilfield perforating gun. Specifically, the all-in-one machine for processing blind holes, keyways, and anti-theft buckles with a double head includes a machine tool A, an electric control cabinet B, a chip removal structure C arranged side by side with the machine tool, a roller lifting system D installed on the machine tool, a self-centering fixture E, a main clamping mechanism F, a starting end integrated processing mechanism G, and a terminal end integrated processing mechanism H.

[0084] Among them, one side of the machine tool A is a frame structure a1 for supporting, and the top surface of the frame structure a1 is provided with two parallel slide rails a2, and the frame structure a1 is provided with a rack a3 near the outer slide rail; the other side of the machine tool A is a trapezoidal groove structure a4, and the bottom surface of the trapezoidal groove structure a4 is an inclined surface, which is convenient for the iron chips generated during the processing to slide from the inclined surface to the chip removal structure C. The outer side of the chip removal structure C is provided with a protective plate to prevent the iron chips from splashing during the processing; the roller lifting system D and the self-centering clamp E are installed in the trapezoidal groove structure of the machine tool A, and the roller lifting system D is used to replace the oil The oilfield perforating gun I is automatically raised and lowered to adjust the position of the center of the oilfield perforating gun barrel body so that the center of the oilfield perforating gun barrel body is concentric with the main chuck of the main clamping mechanism F at the end of the machine tool, which facilitates the main chuck at the end to clamp the oilfield perforating gun; there are multiple self-centering clamps E, which are arranged at intervals along the longitudinal direction of the machine tool and are used to clamp the oilfield perforating gun I; the main chuck on the main clamping mechanism F can move back and forth along the longitudinal direction of the machine tool to push the oilfield perforating gun I for positioning to determine the distance from the first blind hole to the end face, and can also clamp the end of the oilfield perforating gun barrel body and drive the oilfield perforating gun to rotate 360 ​​degrees;

[0085] The starting end integrated processing mechanism G and the terminal integrated processing mechanism H are arranged on the slide rail of the machine tool and are respectively arranged near the two ends of the machine tool. The starting end integrated processing mechanism G and the terminal integrated processing mechanism H are both integrated with a milling cutter assembly, a blind hole processing machine, and an anti-theft buckle processing machine. The starting end integrated processing mechanism G is provided with a milling cutter assembly, a blind hole processing machine, and an anti-theft buckle processing machine from the inside to the outside; the terminal integrated processing mechanism H is provided with an anti-theft buckle processing machine, a blind hole processing machine, a milling cutter assembly, and a pipe length measuring assembly from the inside to the outside; the keyway milling cutter on the milling cutter assembly can rotate and move along the Z direction, and can also move forward and backward along the longitudinal direction of the machine tool. Towards the side of the oilfield perforating gun, it is used to extend from the end into the interior of the oilfield perforating gun barrel body, and process the keyway on the inner wall of the oilfield perforating gun barrel body. The milling cutter assembly is provided with a measuring ruler near the keyway milling cutter to ensure the processing depth of the keyway; the blind hole drill and double-head tapping machine on the blind hole processing machine and the anti-theft buckle processing machine can rotate and move along the Z direction, and can also move back and forth along the longitudinal direction of the machine tool. The blind hole is processed by the blind hole drill chip cutting, and the anti-theft buckle is processed by the double-head tapping machine; the electric control cabinet B adopts a high-speed dual-channel CNC system for synchronously controlling the actions of the starting end integrated processing mechanism G and the end end integrated processing mechanism H, and at the same time controlling the actions of other mechanisms.

[0086] In this embodiment, the chip removal structure C is mainly used to collect iron chips generated during the processing and discharge the iron chips. During actual operation, any discharge method can be used. This application does not impose any restrictions on the specific structure of the chip removal structure C.

[0087] Further, if Figures 1 to 4 As shown, in this embodiment, the roller lifting system D includes a plurality of roller lifting mechanisms d1 connected in series through a connecting rod and a lifting drive mechanism d2. The lifting drive mechanism d2 is installed at the end of the machine tool and is used to simultaneously drive the plurality of roller lifting mechanisms d1 connected in series to perform lifting actions. The roller lifting mechanism d1 includes a first base d11 fixed on the machine tool, a turbine screw elevator d12 installed on the first base, and a roller structure d13 installed at the lifting end of the turbine screw elevator. The roller structure d13 and the turbine screw elevator d12 can adopt the existing structure (elevator model: Swl5T screw effective stroke 120mm cylindrical head speed ratio 24:1, manufacturer: Hangzhou Juchuang Machinery Co., Ltd.). The outer ring of the lifting end of the turbine screw elevator d12 is provided with a protective cover d14 for protecting against iron chips flying and affecting the normal operation of the roller lifting system. Specifically, the roller structure d13 includes a support plate, a bearing seat installed at both ends of the support plate, and a roller installed on the bearing seat. The support plate at the bottom of the roller structure is connected to the lifting end of the turbine screw elevator d12 through a clamping sleeve, and the two ends of the roller are connected to the shaft installed on the bearing seat through a clamping sleeve.

[0088] Further, if Figure 1 、 Figure 4 、 Figures 6 to 12 As shown, in this embodiment, the self-centering fixture E includes a second base e1, a base e2, a long rack base e3 and a long rack e4 arranged in the base e2, a dovetail base e5 arranged on the base, a left dovetail slide e6 and a right dovetail slide e7 arranged on the dovetail base e5, a left clamping claw e10 and a right clamping claw e11 arranged on the left dovetail slide e6 and the right dovetail slide e7, a short rack e12 arranged above the long rack e4 and installed at the bottom of the right dovetail slide e7, and a gear e13 meshing with the long rack e4 and the short rack e12 and installed in the base e2;

[0089] The base e2 is a frame structure, which is arranged on the second base e1. The self-centering fixture is fixed to the machine tool through the second base e1. A driving mechanism e14 is installed at one end of the base e2, and a dovetail seat e5 is provided on the top surface of the base e2. Flange bearing seats e15 are provided on both sides of the base e2 at a position away from the driving mechanism e14. The driving rod e141 of the driving mechanism e14 extends into the base e2, and the end is fixedly connected to the long rack seat e3. Specifically, the end of the driving rod e141 can be fixed to the long rack seat e3 by a locking nut; the end face of the long rack seat e3 is fixedly connected to the long rack e4 , the top surface is fixedly connected to the left dovetail slide e6 through the linkage block e16; a dovetail slide rail e51 is provided on the dovetail seat e5, and dovetail slide rails e51 are processed on the left dovetail slide rail e6 and the right dovetail slide rail e7. The left dovetail slide rail e51 and the right dovetail slide rail e6 are arranged on the dovetail slide rail e51 and move away from or towards each other relative to the dovetail slide rail; a bearing (not shown) is provided in the flange bearing seat e15, and an optical axis (not shown) is provided at the axis center of the gear e13, and both ends of the optical axis are installed on the bearings. The upper end of the gear e13 is engaged with the short rack e12, and the lower end is engaged with the long rack e4.

[0090] Further, continue as Figures 6 to 12 As shown, in this embodiment, the left dovetail skateboard e6 and the right dovetail skateboard e7 are respectively provided with a left claw holder e8 and a right claw holder e9, and the left claw holder e8 and the right claw holder e9 are arranged opposite to each other. The left claw holder e8 is provided with a left claw e10, and the right claw holder e9 is provided with a right claw e11. The left claw e10 and the right claw e11 move toward each other synchronously and are used to clamp the oilfield perforating gun I, and the surfaces of the left claw e10 and the right claw e11 in contact with the oilfield perforating gun I are anti-slip surfaces.

[0091] Continue as Figure 10 、 Figure 11As shown, in this embodiment, the driving mechanism e14 is preferably an oil cylinder or an air cylinder, the piston rod of the oil cylinder or the air cylinder is fixedly connected to the long rack seat e3, the long rack seat e3 is a frame structure, and the linkage block e16 and the long rack seat e3 are an integrated structure.

[0092] Further, if Figures 6 to 10 As shown, in this embodiment, an avoidance area e511 is provided in the middle of the dovetail slide rail e51 on the dovetail seat, and the linkage block e16 on the top surface of the long rack seat e3 passes through the avoidance area e511 of the dovetail slide rail and is fixedly connected to the left dovetail slide plate e6; the short rack e12 is fixed to the bottom of the right dovetail slide plate e7, and passes through the avoidance area e511 of the dovetail slide rail to engage with the upper end of the gear e13.

[0093] Further, if Figure 6 、 Figure 7 As shown, in this embodiment, side guard plates e17 are provided on both sides of the base e2, and end guard plates e18 are provided on the ends. The side guard plates e17 and the end guard plates e18 protect the structure in the fixture so that it can be suitable for mechanical processing and prevent iron filings generated during mechanical processing from falling into the fixture and affecting the normal use of the fixture.

[0094] Furthermore, in this embodiment, an oil cup 19 is provided on the left clamping jaw seat e8 and the right clamping jaw seat e9, and the oil outlet of the oil cup e19 is connected to the oil channel (not shown) on the left dovetail slide e6 and the right dovetail slide e7. The oil in the oil cup e19 seeps into between the dovetail slide rail e51 and the dovetail groove through the oil channel, thereby lubricating the dovetail slide rail.

[0095] In this embodiment, a nut (unmarked) is provided at the end of the dovetail seat e5, and the limiting screw e20 passes through the nut and extends into the avoidance area of ​​the dovetail slide rail e51. The limiting screw e20 cooperates with the linkage block e16 on the long rack seat e3 to limit the maximum stroke of the clamp.

[0096] The working principle of the self-centering clamp E provided by the present invention is as follows: the driving mechanism e14 moves, driving the driving rod e141, the driving rod e141 drives the long rack seat e3 to move, the long rack seat e3 drives the long rack e4 and the left dovetail skateboard e6 to move synchronously, and while the long rack e4 moves, the right dovetail skateboard e7 is synchronously driven to move through the gear e13 and the short rack e12, so that the left dovetail skateboard e6 and the right dovetail skateboard e7 move away from each other or towards each other, and the left dovetail skateboard e6 and the right dovetail skateboard e7 synchronously drive the left clamping claw e10 and the right clamping claw e11 to move away from each other or towards each other.

[0097] Further, if Figures 1 to 3As shown, in this embodiment, the end of the machine tool A is provided with two parallel short slide rails a5 at the position where the main clamping mechanism F is installed. The main clamping mechanism F includes a sliding seat f1 installed on the short slide rail and capable of sliding relative to the short slide rail, a driving motor f2 for driving the sliding seat to move, and a hydraulic rotary chuck f3 installed on the sliding seat. The driving motor f2 is preferably a servo motor, which is fixed to the end of the machine tool A through a motor seat. The servo motor drives the screw to rotate. A nut is provided on the screw, and the nut is connected to the sliding seat f1 and installed on the bottom surface of the sliding seat; the hydraulic rotary chuck f3 includes a main chuck f31, a clamping mechanism f32 and a rotating mechanism f33. 33 are respectively used to drive the main chuck f31 for clamping and 360° rotation. The power source of the clamping mechanism f32 can be an oil cylinder, and the power source of the rotating mechanism f33 can be a servo motor. The hydraulic rotary chuck f3 can directly adopt the existing commercially available structure (the rotating mechanism f33 adopts a CNC roller cam turntable, model: roller cam four-axis GTN250, manufacturer: Getu Precision Machinery (Suzhou) Co., Ltd.); the main chuck f31 is a three-jaw solid power chuck, model: 3p10A8, manufacturer: Jiahe Precision Machinery Co., Ltd., and the clamping mechanism f32 is a universal rotary oil cylinder, model: RK-125 (N), manufacturer: Jiahe Precision Machinery Co., Ltd.). This application does not introduce the installation of each component in detail.

[0098] Further, if Figure 1 、 Figure 2 、 Figures 13 to 20 As shown, in this embodiment, the starting end integrated processing mechanism G includes a first slide g1 installed on the slide rail a2 and sliding back and forth relative to the slide rail, a first gear g2 arranged at the bottom of the first slide and meshing with the rack a3, a first reducer (preferably a servo motor) g3 for driving the first gear to rotate, a first support frame g4 installed on the first slide, a first Z-direction driving mechanism g5 installed on the first support frame, a first sliding table g6 moving along the Z direction relative to the first support frame, a blind hole processing machine 2 installed on the first sliding table, an anti-theft buckle processing machine 3 installed on the outer side wall of the first support frame g4, a first auxiliary bracket g7 arranged on the inner side wall of the first support frame g4, a second Z-direction driving mechanism g8 installed on the first auxiliary bracket, a second sliding table g9 moving along the Z direction relative to the first auxiliary bracket, and a milling cutter assembly 1 installed on the second sliding table;

[0099] Among them, the first support frame g4 is slidably connected to the first sliding platform g6, the first Z-direction driving mechanism g5 is used to drive the first sliding platform to move along the Z direction, the first auxiliary bracket 1 is slidably connected to the second sliding platform g9, and the second Z-direction driving mechanism g8 is used to drive the second sliding platform to move along the Z direction; specifically, a servo motor can be used to drive the screw rod, and the screw rod drives the nut, and the nut drives the first sliding platform to move along the Z direction; the keyway milling cutter on the milling cutter assembly faces the side of the oilfield perforating gun, and is used to extend into the interior of the oilfield perforating gun from the starting end, and a blind hole measuring scale assembly 5 is also provided on the side of the blind hole processing machine 2 (the side close to the milling cutter assembly), and the two drill bits of the double-head tapping machine on the anti-theft buckle processing machine 3 are respectively installed with a tap and a drill milling cutter, and the drill milling cutter is located on the outside of the tap (away from the side of the blind hole processing machine 2);

[0100] The end-integrated processing mechanism H includes a second slide h1 mounted on a slide rail a2 and sliding back and forth relative to the slide rail, a second gear h2 provided at the bottom of the second slide and meshing with the rack a3, a second reducer h3 for driving the second gear to rotate (preferably a servo motor), a second support frame h4 mounted on the second slide, a third Z-direction drive mechanism h5 mounted on the second support frame, a third sliding platform h6 moving in the Z direction relative to the second support frame, a blind hole processing machine 2 mounted on the third sliding platform, an anti-theft buckle processing machine 3 mounted on the inner side wall of the second support frame, a second auxiliary bracket h7 provided on the outer side wall of the second support frame h4, a fourth Z-direction drive mechanism h8 mounted on the second auxiliary bracket, a fourth sliding platform h9 moving in the Z direction relative to the second auxiliary bracket, a milling cutter assembly 1 mounted on the fourth sliding platform, and a pipe length measuring ruler assembly 4 mounted on the outer side of the second auxiliary bracket;

[0101] Among them, the second support frame h4 is slidably connected to the third sliding platform h6, the third Z-direction driving mechanism h5 is used to drive the third sliding platform to move along the Z direction, the second auxiliary bracket h7 is slidably connected to the fourth sliding platform h9, and the fourth Z-direction driving mechanism h8 is used to drive the fourth sliding platform h9 to move along the Z direction; the keyway milling cutter on the milling cutter assembly faces the side of the oilfield perforating gun, and is used to extend into the interior of the oilfield perforating gun from the end, and a blind hole measuring ruler assembly 5 is also provided on the side of the blind hole processing machine 2 (the side away from the milling cutter assembly), and the two drill bits of the double-head tapping machine on the anti-theft buckle processing machine 3 are respectively installed with a tap and a drill milling cutter, and the drill milling cutter is located on the outside of the tap (close to the side of the blind hole processing machine 2); a pipe length measuring ruler assembly 4 for measuring the length of the oilfield perforating gun is provided on the outside of the second auxiliary bracket h7.

[0102] Further, if Figure 13 、 Figure 19 、 Figure 20As shown, in this embodiment, the milling cutter assembly 1 includes a first spindle motor 11 and a keyway fixing seat 12 fixed on the sliding table, a pinion assembly 13 installed on the keyway fixing seat, and a keyway milling cutter 14 installed on the pinion assembly; wherein, the first spindle motor 11 is connected to the transmission shaft on the pinion assembly 13 through a coupling and a connecting shaft, and the connecting shaft is hidden in the keyway fixing seat 12, and a bearing is provided at the connection between the connecting shaft and the keyway fixing seat; the pinion assembly 13 includes a lower cover 131, an upper cover 132, and a plurality of small gears arranged between the upper cover and the lower cover. Wheel; wherein, the lower cover 131 is provided with a plurality of bearings, the bearing at the starting end is provided with a transmission shaft 133 connected to the connecting shaft, the transmission shaft is provided with a starting pinion (not marked), the middle bearings are all mounted with shafts and the shafts are provided with intermediate pinions, the end bearings are mounted with shafts and the shafts are provided with end pinions, the starting pinion is meshed with the intermediate pinions, the adjacent intermediate pinions are meshed with each other, the last intermediate pinion is meshed with the end pinion, and the end pinion rotates coaxially with the keyway milling cutter 14 at the upper end of the shaft; the upper cover 132 is provided with a keyway milling cutter 14 at the upper end of the shaft and the starting pinion is meshed with the keyway milling cutter 14 at the upper end of the shaft; An avoidance hole is provided at the position opposite to the end pinion, and the transmission shaft 133 connected to the starting pinion and rotating coaxially passes through the avoidance hole and is connected to the connecting shaft through a coupling. The keyway milling cutter 14 passes through the avoidance hole to expose the outside of the upper cover, and a bearing is also provided at the connection between the transmission shaft and the upper cover; a plurality of bearings are provided on the upper cover at a position opposite to the intermediate pinion, and the upper end of the shaft connected to the intermediate pinion is connected to the bearing in the upper cover; the shaft connected to the keyway milling cutter 14 is also provided with a bearing at the connection with the upper cover, and the bearing and the bearing opposite to the bearing in the lower cover are both NSK angular contact machine main High-speed shaft bearing, this type of bearing can adjust the clearance, which can make the keyway milling cutter more firmly installed, prevent the keyway milling cutter from vibrating due to assembly clearance, and ensure processing accuracy; the upper cover and the lower cover are fixed (fixed by bolts) to form a pinion assembly, and the pinion assembly is fixed to the bottom of the keyway fixing seat 12 through the lower hoop 15; when in action, the first spindle motor 11 drives the connecting shaft to rotate, the connecting shaft drives the transmission shaft 133 and the starting pinion to rotate, the starting pinion drives the intermediate pinion to rotate in turn, and drives the end pinion and the keyway milling cutter 14 to rotate through the intermediate pinion.

[0103] Furthermore, in this embodiment, a measuring ruler 6 (contact sensor) is provided on the lower cover 131 near the end pinion. The measuring ruler 6 is used to measure the inner wall of the barrel of the oilfield perforating gun (serving as a CNC tool setting function). When the measuring ruler contacts the inner wall of the oilfield perforating gun, the control system on the electric control cabinet B records this coordinate position as the zero point, and then performs keyway processing according to the processing depth, thereby achieving precise control of the keyway depth and solving the problem of uneven keyway depth caused by inconsistent pipe wall thickness.

[0104] Furthermore, in this embodiment, a first lubricating cotton wheel g10 is provided near the first gear g2. The first lubricating cotton wheel g10 is installed on a lubricating cotton wheel adjustment plate g11 with an oil leakage hole. The first lubricating cotton wheel g10 is engaged with the rack a3. A waist-shaped hole is provided at the connection between the lubricating cotton wheel adjustment plate g11 and the first skateboard g1. The lubricating cotton wheel adjustment plate g11 is installed on the first skateboard g1 by bolts. The waist-shaped hole is used to adjust the distance between the lubricating cotton wheel and the lubricating rack. At the same time, lubricating oil is injected into the oil leakage hole of the lubricating cotton wheel adjustment plate by an automatic oil pump to lubricate the rack.

[0105] Further, if Figure 13 、 Figure 14 As shown, in this embodiment, the blind hole processing machine 2 includes a blind hole power head 21 and a telescopic dust cover 22 installed on the blind hole power head. The blind hole power head adopts an existing structure, including a BT50 power head (Hankun Suzhou Intelligent Automation Technology Co., Ltd.) for driving a blind hole drill bit and a tool cylinder 212 (Hankun Suzhou Intelligent Automation Technology Co., Ltd.) for replacing a blind hole tool holder; the telescopic dust cover 22 is used to cover the position of the blind hole drill bit to prevent iron chips from flying when processing blind holes, and includes an upper cover 221 and a lower cover 222. The upper cover is fixed on the blind hole power head, and the upper cover is arranged in the lower cover, and the upper cover and the lower cover are connected by four guide rods 223 with limit parts at both ends, and the guide rods are provided with a first compression spring 224, so that the lower cover can be telescopic relative to the upper cover.

[0106] Furthermore, in this embodiment, the lower cover includes a cover body and a cover door hinged to the cover body. When the cover door is closed, it forms a closed structure with the cover body. This structural design makes it convenient to open the cover door to replace the blind hole drill bit. In addition, the position where the cover body contacts the wall of the oil field perforating gun barrel is an arc structure. Because the lower cover can adaptively adjust with the depth of blind hole processing, the area around the blind hole always maintains a fully closed structure, completely solving the problem of iron chips splashing.

[0107] Further, if Figure 14 As shown, in this embodiment, the blind hole ruler assembly 5 is installed on a long connecting plate (not marked), and the long connecting plate is fixed to the side of the blind hole processing machine 2. The blind hole ruler assembly 5 includes a telescopic rod 51 on the same line as the blind hole drill bit, and the upper end of the telescopic rod 51 is fixed on the long connecting plate, and the telescopic part of the telescopic rod is connected to the reference block 52. A second compression spring 53 is provided between the reference block 52 and the fixed part of the telescopic rod. A displacement sensor 54 is provided on the long connecting plate at a position close to the reference block, and the blind hole processing depth is accurately recorded by the displacement sensor. The lower end of the telescopic part of the telescopic rod is installed on the long connecting plate through a guide seat 55. The guide seat can not only realize the installation of the telescopic rod but also play a guiding role.

[0108] Further, if Figure 13 、 Figure 14 As shown, in this embodiment, the anti-theft button processing machine 3 includes a double-head tapping machine 31, a third spindle motor 32 for driving the double-head tapping machine to rotate synchronously, and a servo motor 33 for driving the double-head tapping machine to move along the Z direction. The anti-theft button processing machine adopts the existing structure and is assembled by assembling the existing 92 double servo power head (the third spindle motor h82 and servo motor h83 in this embodiment) and the double-head synchronizer (the double-head tapping machine in this embodiment). The power of the 92 double servo power head spindle motor is 2.3kw, and the servo feed power is 0.75kw, double-head synchronizer model: st125; manufacturer: Dingke Machinery Equipment Co., Ltd., one drill bit of the double-head tapping machine is used to install the tap, and the other drill bit is used to install the drill and milling cutter. The two drill bits are connected to the third spindle motor through a tool divider and rotate synchronously with the third spindle motor. The drill and milling cutter is longer than the tap and is located on the outside of the tap. When the drill and milling cutter is drilling, the tap does not contact the barrel of the oilfield perforating gun. When the tap is tapping, the anti-theft buckle processing machine is moved so that the drill and milling cutter is located on the outside of the end face of the barrel of the oilfield perforating gun, thereby not affecting the tapping.

[0109] Furthermore, in this embodiment, the pipe length measuring gauge assembly 4 is mounted on the outside of the second auxiliary bracket via a connecting plate. A three-axis, three-rod, adjustable-stroke cylinder 41 is provided on the connecting plate. The telescopic end of the three-axis, three-rod, adjustable-stroke cylinder is connected to an end-face measuring mechanism 42. The end-face measuring mechanism 42 is a contact sensor used to measure the length of the oilfield perforating gun and ensure the accuracy of the blind hole and anti-theft buckle at the tail end to the end face. Specifically, the end-face measuring mechanism 42 includes a movable end plate for contacting the end face of the oilfield perforating gun barrel and capable of moving longitudinally along the oilfield perforating gun. A limit switch (not shown) is provided on the other side of the movable end plate. The movable end plate is fixed to the optical axis, which is capable of moving longitudinally along the oilfield perforating gun via a linear bearing mounted on the vertical plate. When the pipe length measuring gauge assembly contacts the end face of the oilfield perforating gun barrel and continues to drive the movable end plate to move along the linear bearing until it contacts the limit switch, the limit switch feedbacks a signal to the numerical control system. The numerical control system records the current coordinates and determines the length of the oilfield perforating gun through data conversion processing. In this embodiment, the movable end plate can be reset by a reset spring fixed between the movable end plate and the vertical plate.

[0110] Furthermore, in this embodiment, a balancing cylinder nitrogen storage tank 7 is installed on the first support frame g4 and the second support frame h4 on the side opposite to the blind hole processing machine 2. A balancing cylinder 8 is also installed on the first support frame g4 and the second support frame h4. The cylinder body of the balancing cylinder 8 is fixed on the top of the first support frame g4 and the second support frame h4. The end of the telescopic rod of the balancing cylinder 8 is connected to the sliding table h6 on which the blind hole processing machine is installed. The nitrogen-filled balancing cylinder nitrogen storage tank 7 is connected to the balancing cylinder 8 to provide power for the balancing cylinder 8. The balancing cylinder 8 provides an upward pulling force to balance the downward gravity of the blind hole power head 21, so that the blind hole processing machine 2 can move downward quickly, thereby improving processing efficiency.

[0111] Furthermore, in this embodiment, a second lubricating cotton wheel (unmarked) is provided near the second gear h2. The second lubricating cotton wheel is mounted on a lubricating cotton wheel adjustment plate with an oil leakage hole. The second lubricating cotton wheel is engaged with the rack. A waist-shaped hole is provided at the connection between the lubricating cotton wheel adjustment plate and the second slide. The lubricating cotton wheel adjustment plate is mounted on the second slide by bolts, and lubricating oil is injected into the oil leakage hole of the lubricating cotton wheel adjustment plate by an automatic oil pump to lubricate the rack.

[0112] This embodiment also provides a method for processing blind holes, keyways, and anti-theft buckles on a double-ended oilfield perforating gun, comprising the following steps:

[0113] Step 1. The oilfield perforating gun to be processed is placed on the roller lifting system D using the suction cup assembly of the automatic truss loading and unloading system. The roller lifting system D automatically adjusts the center height of the oilfield perforating gun I according to the diameter of the oilfield perforating gun I, so that the center of the oilfield perforating gun I tube body is concentric with the main chuck of the main clamping mechanism F at the end of the machine tool;

[0114] Step 2. Control the main chuck on the main clamping mechanism F to move longitudinally along the machine tool to push the oilfield perforating gun I for positioning so that the starting end face of the oilfield perforating gun is aligned with the zero point position of the machine tool;

[0115] Step 3. Control the self-centering clamp E to clamp the pipe body of the oilfield perforating gun;

[0116] Step 4. Control the end-stage integrated processing mechanism H to move longitudinally along the machine tool. When the tube length measuring gauge assembly 4 is located outside the end surface of the oilfield perforating gun barrel, control the three-axis three-rod adjustable stroke cylinder of the tube length measuring gauge assembly 4 to actuate so that the end surface measuring mechanism 42 can contact the oilfield perforating gun. Then, control the end-stage integrated processing mechanism H to move toward the oilfield perforating gun. When the end surface measuring mechanism contacts the end surface of the oilfield perforating gun and triggers the limit switch, the length of the oilfield perforating gun is recorded according to the pre-calibrated dimensions on the machine tool. Finally, control the tube length measuring gauge assembly 4 to move away from the end surface of the oilfield perforating gun barrel.

[0117] Step 5. Synchronously control the starting end integrated processing mechanism G and the terminal end integrated processing mechanism H, causing the milling cutter assemblies 1 on the starting end integrated processing mechanism G and the terminal end integrated processing mechanism H to operate. The starting end and the terminal end milling cutter assemblies 1 are synchronously extended into the interior of the oil field perforating gun. When the measuring ruler 6 contacts the inner wall of the oil field perforating gun, the keyway milling cutter 14 is controlled to operate according to the processing depth to complete the keyway processing while ensuring processing accuracy. After the keyway processing of both ends is completed, the starting end integrated processing mechanism and the terminal end integrated processing mechanism withdraw and return to their original positions.

[0118] Step 6. Continue to synchronously control the starting end integrated processing mechanism G and the end end integrated processing mechanism H to move longitudinally along the machine tool. The anti-theft buckle processing machines at the starting end and the end end simultaneously process the anti-theft buckle. During the anti-theft buckle processing, drilling is performed first and then tapping. After the anti-theft buckle processing at both ends of the oilfield perforating gun barrel is completed, the anti-theft buckle processing machines are controlled to return to their original positions.

[0119] Step 7. Synchronously control the blind hole processing machines at the starting and ending ends to process the blind holes simultaneously. The blind hole processing machine at the starting end starts processing at the starting end of the oilfield perforating gun barrel body, while the blind hole processing machine at the ending end starts processing at the ending end of the oilfield perforating gun barrel body. After processing one phase (one row) of blind holes, the self-centering fixture returns to its original position, and then the main clamping mechanism is controlled to clamp and rotate the oilfield perforating gun to process the blind holes of another phase. After all phases of blind holes are processed, the self-centering fixture returns to its original position, and the processed oilfield perforating gun can be removed using the suction cup assembly.

[0120] The ingenious combination and reasonable layout of the above-mentioned components of the present invention realize the integrated processing of double-headed blind holes, keyways and anti-theft buckles of oilfield perforating guns, greatly improving the processing efficiency while ensuring the processing accuracy (specifically the dimensional accuracy, positional accuracy and depth accuracy of the blind holes, the dimensional accuracy (such as groove width and groove depth) and positional accuracy (such as symmetry) of the keyways, and the positional accuracy of the anti-theft buckles), and the efficiency will not be reduced due to double-head processing.

[0121] The above are specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto.

Claims

1. An all-in-one machine for processing blind holes, keyways and anti-theft buckles on double heads of oilfield perforating guns, characterized by: It includes a machine tool, an electric control cabinet, a chip removal structure arranged side by side with the machine tool, and a roller lifting system, a self-centering fixture, a main clamping mechanism, a starting end integrated processing mechanism, and an end end integrated processing mechanism installed on the machine tool; Among them, one side of the machine tool is a frame structure for supporting, the top surface of the frame structure is provided with two parallel slide rails, and the frame structure is provided with a rack near the outer slide rails; the other side of the machine tool is a trapezoidal groove structure, the bottom surface of the trapezoidal groove structure is an inclined surface; the roller lifting system and the self-centering clamp are installed in the trapezoidal groove structure of the machine tool, and the roller lifting system is used to automatically lift and lower when replacing the oilfield perforating gun, adjust the position of the center of the oilfield perforating gun barrel body, and make the center of the oilfield perforating gun barrel body concentric with the main chuck of the main clamping mechanism at the end of the machine tool; there are multiple self-centering clamps for clamping the oilfield perforating gun; the main chuck on the main clamping mechanism can move back and forth along the longitudinal direction of the machine tool to push the oilfield perforating gun for positioning, and can also clamp the end of the oilfield perforating gun barrel body to drive the oilfield perforating gun to rotate 360°; The starting end integrated processing mechanism and the terminal integrated processing mechanism are arranged on the slide rail of the machine tool and are respectively arranged near the two ends of the machine tool. The starting end integrated processing mechanism is provided with a milling cutter assembly, a blind hole processing machine, and an anti-theft buckle processing machine in sequence from the inside to the outside; the terminal integrated processing mechanism is provided with an anti-theft buckle processing machine, a blind hole processing machine, a milling cutter assembly, and a pipe length measuring assembly in sequence from the inside to the outside; the keyway milling cutter on the milling cutter assembly faces the side of the oil field perforating gun, and it can rotate and move in the Z direction, and can also move forward and backward along the longitudinal direction of the machine tool, and is used to extend from the end into the oil field perforating gun A keyway is machined on the inner wall of the oilfield perforating gun barrel body, and a measuring ruler is provided on the milling cutter assembly near the keyway milling cutter; the blind hole drill and double-head tapping machine on the blind hole processing machine and the anti-theft buckle processing machine can rotate and move along the Z direction, and can also move forward and backward along the longitudinal direction of the machine tool. The blind hole is processed by the blind hole drill chip cutting, and the anti-theft buckle is processed by the double-head tapping machine. A blind hole measuring ruler assembly is also provided on the blind hole processing machine; the electric control cabinet is used to synchronously control the actions of the starting end integrated processing mechanism and the end end integrated processing mechanism, and at the same time control the actions of other mechanisms.

2. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 1, characterized in that: A protective plate is provided on the outer side of the chip removal structure; two parallel short slide rails are provided at the end of the machine tool at the position where the main clamping mechanism is installed, and the main clamping mechanism includes a sliding seat installed on the short slide rails and capable of sliding relative to the short slide rails, a drive motor for driving the sliding seat, and a hydraulic rotary chuck installed on the sliding seat; The hydraulic rotary chuck includes a main chuck, a clamping mechanism and a rotating mechanism; the roller lifting system includes multiple roller lifting mechanisms connected in series through a connecting rod and a lifting drive mechanism. The lifting drive mechanism is installed at the end of the machine tool and is used to simultaneously drive multiple roller lifting mechanisms connected in series to perform lifting actions.

3. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 1, characterized in that: The self-centering fixture includes a second base, a base, a long rack seat and a long rack arranged in the base, a dovetail seat arranged on the base, a left dovetail slide and a right dovetail slide arranged on the dovetail seat, a left clamping claw and a right clamping claw arranged on the left dovetail slide and the right dovetail slide, a short rack arranged above the long rack and installed at the bottom of the right dovetail slide, and a gear meshed with the long rack and the short rack and installed in the base; wherein, a driving mechanism is installed at one end of the base, and a dovetail seat is provided on the top surface of the base. Flange bearing seats are provided on both sides of the base at a position away from the driving mechanism; the driving rod of the driving mechanism extends into the base, and the end is fixedly connected to the long rack seat; the end face of the long rack seat is fixedly connected to the long rack, and the top surface is fixedly connected to the left dovetail slide through a linkage block; the left dovetail slide and the right dovetail slide are arranged on the dovetail slide rail of the dovetail seat and move away from or towards each other relative to the dovetail slide rail; the gear is installed on the flange bearing seats on both sides of the base, the upper end is meshed with the short rack, and the lower end is meshed with the long rack.

4. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 1, characterized in that: The starting end integrated processing mechanism includes a first slide mounted on a slide rail and sliding back and forth relative to the slide rail, a first gear arranged at the bottom of the first slide rail and meshing with a rack, a first reducer for driving the first gear to rotate, a first support frame mounted on the first slide rail, a first Z-direction driving mechanism mounted on the first support frame, a first sliding table moving relative to the first support frame in the Z direction, a blind hole processing machine mounted on the first sliding table, an anti-theft buckle processing machine mounted on the outer side wall of the first support frame, a first auxiliary bracket arranged on the inner side wall of the first support frame, a second Z-direction driving mechanism mounted on the first auxiliary bracket, a second sliding table moving relative to the first auxiliary bracket in the Z direction, and a milling cutter assembly mounted on the second sliding table; The end-integrated processing mechanism includes a second slide mounted on the slide rail and sliding back and forth relative to the slide rail, a second gear arranged at the bottom of the second slide and meshing with the rack, a second reducer for driving the second gear to rotate, a second support frame mounted on the second slide, a third Z-direction driving mechanism mounted on the second support frame, a third sliding platform that moves along the Z direction relative to the second support frame, a blind hole processing machine mounted on the third sliding platform, an anti-theft buckle processing machine mounted on the inner side wall of the second support frame, a second auxiliary bracket arranged on the outer side wall of the second support frame, a fourth Z-direction driving mechanism mounted on the second auxiliary bracket, a fourth sliding platform that moves along the Z direction relative to the second auxiliary bracket, a milling cutter assembly mounted on the fourth sliding platform, and a pipe length measuring ruler assembly mounted on the outer side of the second auxiliary bracket; The milling cutter assembly includes a first spindle motor and a keyway fixing seat fixed on the sliding table, a pinion assembly installed on the keyway fixing seat, and a keyway milling cutter installed on the pinion assembly. The first spindle motor is connected to the transmission shaft on the pinion assembly through a coupling and a connecting shaft, and the connecting shaft is hidden in the keyway fixing seat; the blind hole processing machine includes a blind hole power head and a telescopic dust cover installed on the blind hole power head.

5. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 3, characterized in that: The base of the self-centering clamp is a frame structure, with side guards on both sides of the base and end guards at the ends; the driving mechanism is an oil cylinder or an air cylinder, and the piston rod of the oil cylinder or the cylinder is fixedly connected to the long rack seat; the long rack seat is a frame structure, and the linkage block and the long rack seat are an integrated structure; the left dovetail slide plate and the right dovetail slide plate are respectively provided with a left claw seat and a right claw seat, and the left claw seat and the right claw seat are arranged opposite to each other, and the left claw seat is provided with a left claw, and the right claw seat is provided with a right claw, and the left claw and the right claw move synchronously toward each other for clamping the perforating gun.

6. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 3, characterized in that: An optical axis is provided at the axis center of the gear of the self-centering fixture, and both ends of the optical axis are mounted on bearings in the flange bearing seat; an avoidance area is provided in the middle of the dovetail slide rail on the dovetail seat, and the linkage block on the top surface of the long rack seat passes through the avoidance area of ​​the dovetail slide rail and is fixedly connected to the left dovetail slide plate; the short rack is fixed to the bottom of the right dovetail slide plate, and passes through the avoidance area of ​​the dovetail slide rail to engage with the upper end of the gear; The left and right jaw holders of the self-centering clamp are provided with oil cups, and the oil outlets of the oil cups are connected with the oil channels on the left and right dovetail slides, so that the oil in the oil cups seeps into the space between the dovetail slide rail and the dovetail slot through the oil channels, thereby lubricating the dovetail slide rail. A nut is provided at the end of the dovetail seat, and a limit screw passes through the nut and extends into the avoidance area of ​​the dovetail slide rail. The limit screw cooperates with the linkage block on the long rack seat to limit the maximum stroke of the clamp.

7. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 4, characterized in that: The pinion assembly of the milling cutter assembly includes a lower cover, an upper cover, and a plurality of pinions arranged between the upper cover and the lower cover; wherein, the lower cover is provided with a plurality of bearings, the bearing at the starting end is provided with a transmission shaft connected to the connecting shaft, the transmission shaft is provided with a starting pinion, the middle bearings are all mounted with shafts and the shafts are provided with intermediate pinions, the end bearings are mounted with shafts and the shafts are provided with end pinions, the starting pinion is meshed with the intermediate pinions, the adjacent intermediate pinions are meshed with each other, the last intermediate pinion is meshed with the end pinion, and the end pinion rotates coaxially with the keyway milling cutter at the upper end of the shaft; the upper cover is provided with an avoidance hole at a position opposite to the starting pinion and the end pinion The transmission shaft connected to the starting pinion and rotating coaxially passes through the avoidance hole and is connected to the connecting shaft through a coupling. The keyway milling cutter passes through the avoidance hole to expose the outside of the upper cover. A plurality of bearings are provided on the upper cover at a position opposite to the intermediate pinion. The upper end of the shaft connected to the intermediate pinion is connected to the bearing in the upper cover; the shaft connected to the keyway milling cutter is also provided with a bearing at the connection with the upper cover; a measuring ruler is also provided on the lower cover near the end pinion, and the measuring ruler is used to measure the inner wall of the oil field perforating gun. When the measuring ruler contacts the inner wall of the oil field perforating gun, the control system on the electric control cabinet records this coordinate position as the zero point, and the pinion assembly is fixed to the bottom of the keyway fixing seat by the lower hoop.

8. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 4, characterized in that: The telescopic dust cover is used to cover the position of the blind hole drill bit, and includes an upper cover and a lower cover. The upper cover is fixed to the blind hole power head and is arranged inside the lower cover. The upper cover and the lower cover are connected by four guide rods with limit parts at both ends. The guide rods are provided with a first compression spring to enable the lower cover to be telescopic relative to the upper cover. The lower cover includes a cover body and a cover door hinged to the cover body. When the cover door is closed, it forms a closed structure with the cover body. The position where the cover body contacts the wall of the oil field perforating gun barrel is an arc structure. A balancing cylinder nitrogen storage tank is installed on the first support frame and the second support frame on the side opposite to the blind hole processing machine. A balancing cylinder is also installed on the first support frame and the second support frame. The cylinder body of the balancing cylinder is fixed on the top of the support frame, and the end of the telescopic rod of the balancing cylinder is connected to the sliding table on which the blind hole processing machine is installed, so as to provide an upward pulling force to balance the downward gravity of the blind hole power head.

9. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of double-head oilfield perforating guns according to claim 4, characterized in that: The blind hole ruler assembly is mounted on a long connecting plate, which is fixed to the side of the blind hole processing machine. The blind hole ruler assembly includes a telescopic rod that is in the same straight line as the blind hole drill bit. The upper end of the telescopic rod is fixed to the long connecting plate, and the telescopic portion of the telescopic rod is connected to the reference block. A second compression spring is provided between the reference block and the fixed portion of the telescopic rod. A displacement sensor is provided on the long connecting plate near the reference block. The displacement sensor accurately records the blind hole processing depth. The lower end of the telescopic portion of the telescopic rod is mounted on the long connecting plate through a guide seat. The pipe length measuring ruler assembly is installed on the outer side of the second auxiliary bracket through a connecting plate. A cylinder is provided on the connecting plate. The telescopic end of the cylinder is connected to the end face measuring mechanism. The end face measuring mechanism includes an end plate that contacts the end face of the oil field perforating gun and can be telescopic. A limit switch is provided on the other side of the end plate. The end plate is moved to contact the end face of the oil field perforating gun and is continuously driven to contact the limit switch. At this time, the length of the oil field perforating gun is recorded.

10. A method for machining blind holes, keyways, and anti-theft buckles using an integrated machine with a double-head oilfield perforating gun according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1. The oilfield perforating gun to be processed is placed on the roller lifting system using the suction cup assembly of the automatic truss loading and unloading system. The roller lifting system automatically adjusts the center height of the oilfield perforating gun according to the diameter of the oilfield perforating gun, so that the center of the oilfield perforating gun barrel is concentric with the main chuck of the main clamping mechanism at the end of the machine tool; Step 2. Control the main chuck on the main clamping mechanism to move longitudinally along the machine tool to push the oilfield perforating gun for positioning so that the starting end face of the oilfield perforating gun is aligned with the zero point position of the machine tool; Step 3. Control the self-centering clamp to clamp the pipe body of the oilfield perforating gun; Step 4. Control the end-stage integrated processing mechanism to move longitudinally along the machine tool. When the tube length measuring scale assembly is located outside the end surface of the oilfield perforating gun barrel, control the cylinder of the tube length measuring scale assembly to actuate so that the end surface measuring mechanism can contact the oilfield perforating gun. Then, control the end-stage integrated processing mechanism to move toward the oilfield perforating gun. When the end surface measuring mechanism contacts the end surface of the oilfield perforating gun barrel and triggers the limit switch, the length of the oilfield perforating gun is recorded according to the dimensions pre-calibrated on the machine tool. Finally, control the tube length measuring scale assembly to move away from the end surface of the oilfield perforating gun barrel. Step 5. Synchronously control the starting and ending integrated processing mechanisms to activate the milling cutter assemblies on the starting and ending integrated processing mechanisms. The starting and ending milling cutter assemblies are synchronously extended into the oilfield perforating gun. When the measuring ruler contacts the inner wall of the oilfield perforating gun, the keyway milling cutter is controlled to operate according to the processing depth to complete the keyway processing. After the keyway processing at both ends is completed, the starting and ending integrated processing mechanisms exit and return to their original positions. Step 6. Continue to synchronously control the starting end integrated processing mechanism and the end end integrated processing mechanism to move along the longitudinal direction of the machine tool. The anti-theft buckle processing machines at the starting end and the end end simultaneously process the anti-theft buckle. During the anti-theft buckle processing, drilling is performed first and then tapping. After the anti-theft buckle processing at both ends of the oilfield perforating gun barrel is completed, the anti-theft buckle processing machines are controlled to return to their original positions. Step 7. Synchronously control the blind hole processing machines at the starting and ending ends to process the blind holes simultaneously. The blind hole processing machine at the starting end starts processing at the starting end of the oilfield perforating gun barrel body, while the blind hole processing machine at the ending end starts processing at the ending end of the oilfield perforating gun barrel body. After processing one row of blind holes, the self-centering fixture returns to its original position, and then the main clamping mechanism is controlled to clamp and rotate the oilfield perforating gun to process another row of blind holes. After the blind holes of all phases are processed, the self-centering fixture returns to its original position, and the processed oilfield perforating gun can be removed using the suction cup assembly.

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