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

Abstract

The invention relates to a single-head blind hole, key groove and anti-theft buckle machining all-in-one machine for 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 key groove machining mechanism and a blind hole and anti-theft buckle machining mechanism, wherein the roller lifting system, the self-centering clamp, the main clamping mechanism, the key groove machining mechanism and the blind hole and anti-theft buckle 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, clamping the end of the oil field perforating gun and driving the oil field perforating gun to rotate. The key groove milling cutter, the blind hole drill bit and the double-end tapping machine can rotate and move in the Z direction and the longitudinal direction of the machine tool, a measuring scale is arranged at the position, close to the key groove milling cutter, of the key groove machining mechanism, a blind hole depth measuring mechanism is arranged on the side, close to the blind hole drill bit, of the blind hole and anti-theft buckle machining mechanism, and a pipe length measuring scale assembly is arranged on the side, close to the double-end tapping machine, of the blind hole and anti-theft buckle machining mechanism. All the components are ingeniously combined and reasonably arranged and matched for use, integrated machining of a single-head blind hole, a key groove and an anti-theft buckle of the oil field perforating gun is achieved, and meanwhile 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 machining blind holes, keyways and anti-theft buckles with a single head of an oilfield perforating gun. 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 depending on the actual situation. 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 barrel 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 gun processing requires three pieces of equipment: a blind hole machine, a keyway machine, and a tapping machine for the anti-theft buckle. This means that existing oilfield perforating guns require three separate pieces of equipment for processing, rather than integrated processing. This is primarily due to significant process differences. If a single piece of equipment were to be used, efficient collaboration would be required, making functional integration and layout difficult. For example, an integrated machine must integrate multiple processing functions for processing blind holes, keyways, and anti-theft buckles. 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 challenging. This requires comprehensive consideration of each module's size, shape, and range of motion, as well as the space requirements for clamping, conveying, and chip removal, ensuring convenient operation and maintenance. Consequently, integrated processing of oilfield perforating guns has not yet been achieved, leading to a series of issues, including low processing efficiency, the multiple clamping operations required for the three processes affecting processing precision, and difficulties in reducing 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 single-head processing of blind holes, keyways and anti-theft buckles of oilfield perforating guns. The all-in-one machine realizes the integrated processing of single-head blind holes, keyways and anti-theft buckles of oilfield perforating guns through the ingenious combination and reasonable layout of various components, while ensuring the processing accuracy, position accuracy and depth accuracy of the blind holes, the dimensional accuracy (such as groove width and groove depth) and position accuracy (such as the angle with the blind hole at the head end and the distance to the end face) of the keyway, and the position accuracy of the anti-theft buckle. It solves the technical problem that the integrated processing cannot be achieved at present 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 with a single head of an oilfield perforating gun, comprising 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 keyway processing mechanism, and a blind hole and anti-theft buckle 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, and 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; 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 360 ° rotation; the keyway processing mechanism is arranged on the slide rail of the machine tool, and the keyway milling cutter thereon can rotate at high speed, move along the Z direction, and can also move back and forth along the longitudinal direction of the machine tool, and is used to extend into the interior of the oil field perforating gun barrel body, and process the keyway on the inner wall of the oil field perforating gun barrel body, and the keyway processing mechanism is provided with a measuring ruler at a position close to the keyway milling cutter; the blind hole and anti-theft buckle processing mechanism is arranged on the slide rail of the machine tool, and the blind hole drill and double-head tapping machine thereon can rotate at high speed, 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 cutting chips through the blind hole drill, and the anti-theft buckle is processed by the double-head tapping machine, the blind hole and anti-theft buckle processing mechanism is provided with a blind hole depth measuring mechanism on the side close to the blind hole drill bit, and a pipe length measuring ruler assembly is provided on the side close to the double-head tapping machine; the electric control cabinet is used to control the action of the all-in-one machine.

[0021] 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;

[0022] 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.

[0023] 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.

[0024] As a preferred embodiment of the present invention, the keyway 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 the 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 drive mechanism arranged on the first support frame, a first slide table moving in the Z direction relative to the first support frame, and a milling cutter assembly mounted on the first slide table; wherein the milling cutter assembly includes a first spindle motor and a keyway fixing seat fixed on the first slide table, a pinion assembly mounted on the keyway fixing seat, and a keyway milling cutter mounted on the pinion assembly; the first spindle motor is connected to a transmission shaft on the pinion assembly through a coupling and a connecting shaft, and the connecting shaft is hidden in the keyway fixing seat;

[0025] The blind hole and anti-theft buckle processing mechanism includes a second slide installed 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 installed on the second slide, a second Z-direction drive mechanism installed on the second support frame, a second sliding platform that moves along the Z direction relative to the second support frame, a blind hole processing machine installed on the second sliding platform, and an anti-theft buckle processing machine installed on the second support frame; the blind hole processing machine includes a blind hole power head, a telescopic dust cover installed on the blind hole power head, and a blind hole depth measuring mechanism installed on the blind hole power head.

[0026] 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.

[0027] 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;

[0028] 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.

[0029] As a further preferred embodiment of the present invention, the pinion assembly of the keyway processing mechanism includes a lower cover, an upper cover, and a plurality of pinions arranged between the upper cover and the lower cover; wherein, a plurality of bearings are arranged in the groove of the lower cover, a transmission shaft connected to the connecting shaft is arranged on the bearing at the starting end, a starting pinion is arranged on the transmission shaft, a shaft is installed on the middle bearings and an intermediate pinion is arranged on the shaft, a shaft is installed on the end bearings and an end pinion is arranged on the shaft, 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 opposite to the starting pinion and the end pinion An avoidance hole is provided at the position, 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 numerical 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.

[0030] 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.

[0031] A balancing cylinder nitrogen storage tank is installed on the second support frame on the side opposite to the blind hole processing machine. A balancing cylinder is installed on the second support frame. The cylinder body of the balancing cylinder is fixed on the top of the second support frame. The end of the balancing cylinder telescopic rod is connected to the second sliding platform. The balancing cylinder nitrogen storage tank is connected to the balancing cylinder. The balancing cylinder is used to provide upward pulling force to balance the downward gravity of the blind hole power head.

[0032] As a further preferred embodiment of the present invention, the blind hole depth measuring mechanism 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 depth measuring mechanism includes a telescopic rod on the same line as the blind hole drill bit, the upper end of the telescopic rod is fixed on the long connecting plate, the telescopic part of the telescopic rod is connected to the reference block, and 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 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.

[0033] As a further preferred embodiment of the present invention, a tube length measuring ruler assembly for measuring the length of the oilfield perforating gun is provided on the outside of the anti-theft buckle processing machine, and the tube length measuring ruler assembly is installed on the outside of the anti-theft buckle processing machine 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 tube 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 feedbacks 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.

[0034] The present invention also provides a method for processing blind holes, single-head keyways, and single-head anti-theft buckles of oilfield perforating guns, comprising the following steps:

[0035] 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 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;

[0036] 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;

[0037] Step 3. Control the self-centering clamp to clamp the pipe body of the oilfield perforating gun;

[0038] Step 4. Control the blind hole and anti-theft buckle processing mechanism to move longitudinally along the machine tool. When the tube length measuring scale assembly is located outside the end face 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 face measuring mechanism can contact the oilfield perforating gun. Then, control the blind hole and anti-theft buckle processing mechanism to move toward the oilfield perforating gun. When the end face measuring mechanism contacts the end face 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 face of the oilfield perforating gun barrel.

[0039] Step 5. Control the keyway machining mechanism so that the milling cutter assembly extends from the starting end of the oilfield perforating gun barrel into the interior of 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 machining depth to complete the keyway machining. After the keyway machining is completed, the keyway machining mechanism exits and returns to its original position.

[0040] Step 6. The blind hole and anti-theft buckle processing mechanisms move longitudinally along the machine tool. The anti-theft buckle processing machine processes the anti-theft buckle at the end of the oilfield perforating gun barrel, and then the blind hole processing machine processes the blind holes. After processing a row of blind holes, the self-centering fixture returns to its original position. Then, the main clamping mechanism is controlled to clamp and rotate the oilfield perforating gun to process another row of blind holes. After all the blind holes in the phase sequence 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.

[0041] Advantages and beneficial effects of the present invention:

[0042] (1) The all-in-one machine provided by the present invention greatly improves the processing efficiency of blind holes, keyways and anti-theft buckles of oilfield perforating guns. It can complete the processing of blind holes, keyways and anti-theft buckles of a single head of an oilfield perforating gun on one 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 control of the CNC system, automated processing can be achieved, significantly improving the processing speed.

[0043] (2) 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 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.

[0044] (3) The all-in-one machine provided by the present invention has a self-centering hydraulic clamp with adjustable stroke and an automatic roller 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.

[0045] (4) 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.

[0046] (5) 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.

[0047] (6) 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.

[0048] (7) 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 depth measuring mechanism for measuring the hole depth. In order to ensure the linear accuracy of the blind hole, the present invention provides a pipe length measuring ruler assembly for measuring the pipe length, which effectively ensures the processing accuracy of the blind hole on the all-in-one machine.

[0049] (8) The 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.

[0050] (9) The linear movement stroke of the clamping jaws provided by the present invention can reach 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.

[0051] (10) The 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.

[0052] (11) 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.

[0053] (12) The keyway machining mechanism on the integrated machine provided by the present invention adopts gear transmission. The main shaft motor is connected to the pinion assembly through a coupling and a connecting rod. Multiple pinion wheels sequentially drive the keyway milling cutter to rotate and realize the machining of the keyway. This structural design runs smoothly and has high torque. Compared with belt transmission, it has a stable and fast speed and can meet the requirements of machining keyways of small-diameter perforating gun barrels. In addition, a ruler is 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 machining depth and solving the problem of uneven keyway depth caused by inconsistent pipe wall thickness.

[0054] (13) The present invention provides a balancing cylinder nitrogen storage tank and a balancing 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

[0055] 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.

[0056] Figure 1 The overall structure of the processing machine provided by the present invention is schematically shown Figure 1 ;

[0057] Figure 2 The overall structure of the processing machine provided by the present invention is schematically shown Figure 2 (Hidden protective plate);

[0058] Figure 3 For the present invention Figure 2 A magnified view of the installation position of the middle main clamp mechanism;

[0059] Figure 4 For the present invention Figure 2 Enlarged view of the installation position of the middle keyway processing mechanism;

[0060] Figure 5 For the present invention Figure 2 A magnified view of the installation position of the center blind hole and the anti-theft buckle processing mechanism;

[0061] Figure 6 For the present invention Figure 2 Enlarged view of the middle roller lifting system and the self-centering fixture installation location;

[0062] Figure 7 Schematic diagram of the overall structure of the self-centering fixture provided by the present invention Figure 1 ;

[0063] Figure 8 Schematic diagram of the overall structure of the self-centering fixture provided by the present invention Figure 2 ;

[0064] Figure 9 Schematic diagram of the overall structure of the self-centering fixture (hidden guard plate) provided by the present invention Figure 1 ;

[0065] Figure 10 Schematic diagram of the overall structure of the self-centering fixture (hidden guard plate) provided by the present invention Figure 2 ;

[0066] Figure 11 A top view of the self-centering fixture provided by the present invention;

[0067] Figure 12 For the present invention Figure 11 Cross-section of the middle AA;

[0068] Figure 13 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;

[0069] Figure 14 A schematic diagram of the overall structure of the roller lifting mechanism provided by the present invention;

[0070] Figure 15 The overall structure of the keyway processing mechanism of the present invention is shown in FIG. Figure 1 (Hide the top cover);

[0071] Figure 16 The overall structure of the keyway processing mechanism of the present invention is shown in FIG. Figure 2 ;

[0072] Figure 17 It is a partial enlarged view of the keyway processing mechanism of the present invention;

[0073] Figure 18 The overall structure of the blind hole and anti-theft buckle processing mechanism of the present invention is shown in FIG. Figure 1 ;

[0074] Figure 19 The overall structure of the blind hole and anti-theft buckle processing mechanism of the present invention is shown in FIG. Figure 2 ;

[0075] Figure 20 The overall structure of the blind hole and anti-theft buckle processing mechanism of the present invention is shown in FIG. Figure 3 ;

[0076] Figure 21 It is a planar schematic diagram of the blind hole and anti-theft buckle processing mechanism of the present invention;

[0077] Figure 1: Machine tool A, electric control cabinet B, chip removal structure C, roller lifting system D, self-centering fixture E, main clamping mechanism F, keyway processing mechanism G, blind hole and anti-theft buckle processing mechanism H, protective plate I, oil field perforating gun J; 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 plate 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 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-axis drive mechanism g5, first slide table g6, milling cutter assembly g7, measuring ruler g8, first lubricating cotton wheel g9, lubricating cotton wheel adjustment plate g10, first spindle motor g71, keyway fixing seat g72, pinion assembly g73, keyway milling cutter g74, lower hoop g75, lower cover g731, upper cover g732, transmission shaft g733; second slide h1, second gear h2, second reducer h3, second support frame h4, second Z-axis drive mechanism h5, second slide table h6, blind hole processing machine h7, anti-theft buckle processing machine h8, blind hole depth measuring mechanism h9, pipe length measuring ruler assembly h10, balancing cylinder nitrogen storage tank h11, balancing cylinder h12, long connecting plate h13, blind hole power head h71, telescopic dust cover h72, second spindle motor h711, cutting cylinder h712, upper cover h721, lower cover h722, guide rod h723, first compression spring h724, double-head tapping machine h81, third spindle motor h82, servo motor h83, telescopic rod h91, reference block h92, second compression spring h93, displacement sensor h94, guide seat h95, cylinder h101, end face measuring mechanism h102. DETAILED DESCRIPTION

[0078] 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.

[0079] 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.

[0080] like Figures 1 to 6 As shown, this embodiment provides an all-in-one machine for processing blind holes, keyways, and anti-theft buckles with a single head of an oilfield perforating gun, comprising 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 keyway processing mechanism G, and a blind hole and anti-theft buckle processing mechanism H;

[0081] 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 a rack a3 is provided on the frame structure a1 near the outer slide rails; 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 iron chips generated during processing to slide from the inclined surface into the chip removal structure C, and a protective plate I is provided on the outer side of the chip removal structure C to prevent iron chips from splashing during 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 automatically lift and lower when replacing the oilfield perforating gun J, and adjust the position of the center of the oilfield perforating gun barrel body so that the center of the oilfield perforating gun J barrel body is concentric with the main chuck of the main clamping mechanism F at the end of the machine tool, so as to facilitate the end main chuck to clamp the oilfield perforating gun; the self-centering clamp E is multiple, and the multiple self-centering clamps E are arranged at intervals along the longitudinal direction of the machine tool. , used to clamp the oilfield perforating gun J; the main chuck on the main clamping mechanism F can move back and forth along the longitudinal direction of the machine tool, used to push the oilfield perforating gun J 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°; the keyway processing mechanism G is arranged on the slide rail of the machine tool, and the keyway milling cutter on the keyway processing mechanism G can rotate and move along the Z direction, and can also move back and forth along the longitudinal direction of the machine tool, used to extend 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 blind hole and anti-theft buckle processing mechanism H is arranged on the slide rail of the machine tool, and the blind hole drill and double-head tapping machine on the blind hole and anti-theft buckle processing mechanism H can rotate and move along the Z direction, and can also move back and forth along the longitudinal direction of the machine tool, and the blind hole is processed by cutting chips through the blind hole drill and the anti-theft buckle is processed by the double-head tapping machine; the electric control cabinet B is used to control the actions of the above-mentioned mechanisms.

[0082] 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.

[0083] Further, if Figure 2 、 Figure 6 、 Figure 14 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.

[0084] Further, if Figure 2 、 Figures 6 to 13 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;

[0085] 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.

[0086] Further, continue as Figures 7 to 13 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 J, and the surfaces of the left claw e10 and the right claw e11 in contact with the oilfield perforating gun J are anti-slip surfaces.

[0087] Continue as Figure 11 、 Figure 12 As 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.

[0088] Further, if Figures 7 to 11 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.

[0089] Further, if Figure 7 、 Figure 8As 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] Further, if Figure 2 、 Figure 4 、 Figures 15 to 17As shown, in this embodiment, the keyway 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, 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 arranged on the first support frame, a first sliding table g6 moving along the Z direction relative to the first support frame, and a milling cutter assembly g7 installed on the first sliding table; wherein, the first support frame g4 is slidably connected to the first sliding table g6, the first Z-direction driving mechanism g5 is used to drive the first sliding table to move along the Z direction, and a servo motor can be used to drive the screw rod. The rod drives the nut, and the nut drives the first sliding table to move along the Z direction; the milling cutter assembly g7 includes a first spindle motor g71 and a keyway fixing seat g72 fixed on the first sliding table, a pinion assembly g73 installed on the keyway fixing seat, and a keyway milling cutter g74 installed on the pinion assembly; wherein, the first spindle motor g71 is connected to the transmission shaft on the pinion assembly g73 through a coupling and a connecting shaft, and the connecting shaft is hidden in the keyway fixing seat g72, and a bearing is provided at the connection between it and the keyway fixing seat; the pinion assembly g73 includes a lower cover g731, an upper cover g732, and a plurality of pinions arranged between the upper cover and the lower cover; wherein, a plurality of bearings are provided on the lower cover g731 (the lower cover is provided with a plurality of bearings There is an inner groove, and the bearing is fixed in the inner groove), a transmission shaft g733 connected to the connecting shaft is provided on the bearing at the starting end, and a starting pinion (not marked) is provided on the transmission shaft, and a shaft is installed on the middle bearing and an intermediate pinion is provided on the shaft, and a shaft is installed on the end bearing and an end pinion is provided on the shaft, the starting pinion meshes with the intermediate pinion, the adjacent intermediate pinions mesh with each other, the last intermediate pinion meshes with the end pinion, and the end pinion rotates coaxially with the keyway milling cutter g74 at the upper end of the shaft; an avoidance hole is provided on the upper cover g732 at a position opposite to the starting pinion and the end pinion, and the transmission shaft g733 connected to the starting pinion and coaxially rotating with the starting pinion passes through the avoidance hole and is connected to the connecting shaft through a coupling, and the keyway The milling cutter g74 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 g74 is also provided with a bearing at the connection with the upper cover, and this bearing and the bearing opposite to it in the lower cover are both NSK angular contact machine tool spindle high-speed bearings. 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 the 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 g72 by the lower hoop g75;During operation, the first spindle motor g71 drives the connecting shaft to rotate, which in turn drives the transmission shaft g733 and the starting pinion to rotate. The starting pinion in turn drives the intermediate pinion to rotate, which in turn drives the final pinion and the keyway milling cutter g74 to rotate.

[0095] Furthermore, in this embodiment, a measuring ruler g8 (contact sensor) is provided on the lower cover g731 near the end pinion. The measuring ruler g8 is used to measure the inner wall of the oil field perforating gun (serving as a CNC tool setting). When the measuring ruler contacts the inner wall of the oil field perforating gun, the CNC 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.

[0096] Furthermore, in this embodiment, a first lubricating cotton wheel g9 is provided near the first gear g2. The first lubricating cotton wheel g9 is installed on a lubricating cotton wheel adjustment plate g10 with an oil leakage hole. The first lubricating cotton wheel g9 is engaged with the rack a3. A waist-shaped hole is provided at the connection between the lubricating cotton wheel adjustment plate g10 and the first skateboard g1. The lubricating cotton wheel adjustment plate g10 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.

[0097] Further, if Figure 2 、 Figure 5 、 Figures 18 to 21As shown, in this embodiment, the blind hole and anti-theft buckle processing mechanism H includes a second slide h1 installed on the slide rail a2 and sliding back and forth relative to the slide rail, a second gear h2 arranged 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 installed on the second slide, a second Z-direction drive mechanism h5 installed on the second support frame, a second sliding table h6 moving along the Z direction relative to the second support frame, a blind hole processing machine h7 installed on the second sliding table, and an anti-theft buckle processing machine h8 installed on the second support frame; wherein, the blind hole processing machine h7 includes a blind hole power head h71, a telescopic dustproof device installed on the blind hole power head Cover h72, the blind hole power head adopts the existing structure, including the BT50 power head (Hankun Suzhou Intelligent Automation Technology Co., Ltd.) for driving the blind hole drill bit and the tool cylinder h712 (Hankun Suzhou Intelligent Automation Technology Co., Ltd.) for replacing the blind hole tool holder; the telescopic dust cover h72 is used to cover the position of the blind hole drill bit to prevent iron chips from flying when processing the blind hole, including an upper cover h721 and a lower cover h722. 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 h723 with limit parts at both ends, and the guide rod is provided with a first compression spring h724, so that the lower cover can be telescopic relative to the upper cover.

[0098] 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.

[0099] Furthermore, in this embodiment, the blind hole processing machine h7 is also provided with a blind hole depth measuring mechanism h9 on the side away from the anti-theft buckle processing machine, and the blind hole depth measuring mechanism h9 is installed on the long connecting plate h13, and the long connecting plate h13 is fixed to the side of the blind hole processing machine h7. The blind hole depth measuring mechanism h9 includes a telescopic rod h91 on the same line as the blind hole drill bit, and the upper end of the telescopic rod h91 is fixed on the long connecting plate h13, and the telescopic part of the telescopic rod is connected to the reference block h92. A second compression spring h93 is provided between the reference block h92 and the fixed part of the telescopic rod. A displacement sensor h94 is provided on the long connecting plate h13 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 h13 through a guide seat h95. The guide seat can not only realize the installation of the telescopic rod but also play a guiding role.

[0100] Furthermore, in this embodiment, the anti-theft button processing machine h8 includes a double-head tapping machine h81, a third spindle motor h82 for driving the double-head tapping machine to rotate synchronously, and a servo motor h83 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, the servo feed power is 0.75kw, and the double Model of head synchronizer: 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 milling cutter. The two drill bits are connected to the third spindle motor through a cutter divider and rotate synchronously with the third spindle motor. The drill milling cutter is longer than the tap and is located on the outside of the tap. When the drill milling cutter is drilling, the tap does not contact the barrel of the oilfield perforating gun. When the tap is tapping, the anti-theft button processing machine is moved so that the drill milling cutter is located on the outside of the end face of the oilfield perforating gun barrel, so as not to affect tapping; the anti-theft button processing machine is installed on the side of the second support frame h4. And it is set close to the blind hole processing machine h7; the outer side of the anti-theft buckle processing machine is provided with a pipe length measuring ruler assembly h10 for measuring the length of the oil field perforating gun. The pipe length measuring ruler assembly h10 is installed on the outer side of the anti-theft buckle processing machine through a connecting plate. A three-axis three-rod adjustable stroke cylinder h101 is provided on the connecting plate. The telescopic end of the three-axis three-rod adjustable stroke cylinder is connected to the end face measuring mechanism h102. The end face measuring mechanism h102 is a contact sensor used to measure the length of the oil field perforating gun to ensure the accuracy of the blind hole and anti-theft buckle at the tail to the end face; specifically, the end face measuring mechanism h10 2 includes a movable end plate for contacting the end face of the oilfield perforating gun barrel and capable of longitudinal movement 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 longitudinal movement along the oilfield perforating gun via a linear bearing mounted on the vertical plate. The tube length measuring scale assembly contacts the end face of the oilfield perforating gun barrel and continues to drive the movable end plate along the linear bearing until it contacts the limit switch. The limit switch then feeds a signal to the numerical control system, which records the current coordinates and, through data conversion processing, determines the length of the oilfield perforating gun. In this embodiment, the movable end plate can be reset by a reset spring fixed between the movable end plate and the vertical plate.

[0101] Furthermore, in this embodiment, a balancing cylinder nitrogen storage tank h11 is installed on the second support frame h4 on the side opposite to the blind hole processing machine h7, and a balancing cylinder h12 is installed on the second support frame h4. The cylinder body of the balancing cylinder h12 is fixed on the top of the second support frame h4, and the end of the telescopic rod of the balancing cylinder h12 is connected to the second sliding platform h6. The balancing cylinder nitrogen storage tank h11 is connected to the balancing cylinder h12 to provide power for the balancing cylinder h12. The balancing cylinder h12 provides an upward pulling force to balance the downward gravity of the blind hole power head h71, so that the blind hole processing machine h7 can move downward quickly, thereby improving processing efficiency.

[0102] 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.

[0103] This embodiment also provides a method for processing blind holes, keyways, and anti-theft buckles on a single head of an oilfield perforating gun, comprising the following steps:

[0104] 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 height of the oilfield perforating gun J according to the diameter of the oilfield perforating gun J, so that the center of the oilfield perforating gun J is concentric with the main chuck of the main clamping mechanism F at the end of the machine tool;

[0105] Step 2. Control the main chuck on the main clamping mechanism F to move longitudinally along the machine tool to push the oil field perforating gun J for positioning so that the starting end face of the oil field perforating gun is aligned with the zero point position of the machine tool;

[0106] Step 3. Control the self-centering clamp E to clamp the pipe body of the oilfield perforating gun;

[0107] Step 4. Control the blind hole and anti-theft buckle processing mechanism H to move longitudinally along the machine tool. When the tube length measuring ruler assembly h10 is located outside the end face of the oilfield perforating gun barrel, control the three-axis three-rod adjustable stroke cylinder of the tube length measuring ruler assembly h10 to operate, so that the end face measuring mechanism h102 can contact the oilfield perforating gun. Then, control the blind hole and anti-theft buckle processing mechanism H to move toward the oilfield perforating gun. When the end face measuring mechanism contacts the end face 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 ruler assembly h10 to move away from the end face of the oilfield perforating gun barrel.

[0108] Step 5. Control the keyway machining mechanism G so that the milling cutter assembly G7 extends from the starting end of the oilfield perforating gun barrel into the interior of the oilfield perforating gun. When the measuring ruler G8 contacts the inner wall of the oilfield perforating gun, the keyway milling cutter G74 is controlled to operate according to the machining depth to complete the keyway machining while ensuring machining accuracy. After the keyway machining is completed, the keyway machining mechanism exits and returns to its original position.

[0109] Step 6. The blind hole and anti-theft buckle processing mechanism H moves longitudinally along the machine tool. The anti-theft buckle processing machine processes the anti-theft buckle at the end of the oilfield perforating gun barrel, and then the blind hole processing machine processes the blind holes. After processing a row of blind holes, the self-centering fixture returns to its original position. Then, the main clamping mechanism is controlled to clamp and rotate the oilfield perforating gun to process another row of blind holes. After all the blind holes in the phase sequence 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.

[0110] The ingenious combination and reasonable layout of the above-mentioned components of the present invention realize the integrated processing of single-head blind holes, keyways and anti-theft buckles of oilfield perforating guns, 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 the 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. This solves the technical difficulties that the integrated processing cannot be achieved at present and the oilfield perforating gun is prone to vibration, and the oilfield perforating gun will shake or rotate due to the force during the drilling, tapping, blind hole processing or keyway processing, and the processing accuracy cannot be guaranteed.

[0111] 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 a single head of an oilfield perforating gun, characterized in that: 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 keyway processing mechanism, and a blind hole and anti-theft buckle 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, and 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 clamping plate 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 clamping plate 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 3 60° rotation; the keyway processing mechanism is arranged on the slide rail of the machine tool, and the keyway milling cutter thereon can rotate and move along the Z direction, and can also move back and forth along the longitudinal direction of the machine tool, and is used to extend into the interior of the oil field perforating gun barrel body, and process the keyway on the inner wall of the oil field perforating gun barrel body, and the keyway processing mechanism is provided with a measuring ruler at a position close to the keyway milling cutter; the blind hole and anti-theft buckle processing mechanism is arranged on the slide rail of the machine tool, and the blind hole drill and double-head tapping machine thereon 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 cutting the chip through the blind hole drill, and the anti-theft buckle is processed by the double-head tapping machine, the blind hole and anti-theft buckle processing mechanism is provided with a blind hole depth measuring mechanism on the side close to the blind hole drill bit, and a pipe length measuring ruler assembly is provided on the side close to the double-head tapping machine; the electric control cabinet is used to control the action of the all-in-one machine.

2. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of a single head of an oilfield perforating gun 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 a single head of an oilfield perforating gun 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 a single head of an oilfield perforating gun according to claim 1, characterized in that: The keyway 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 the 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 drive mechanism arranged on the first support frame, a first slide table moving in the Z direction relative to the first support frame, and a milling cutter assembly mounted on the first slide table; wherein the milling cutter assembly includes a first spindle motor and a keyway fixing seat fixed on the first slide table, a pinion assembly mounted on the keyway fixing seat, and a keyway milling cutter mounted on the pinion assembly; the first spindle motor is connected to a transmission shaft on the pinion assembly via a coupling and a connecting shaft, and the connecting shaft is hidden in the keyway fixing seat; The blind hole and anti-theft buckle processing mechanism includes a second slide installed 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 installed on the second slide, a second Z-direction drive mechanism installed on the second support frame, a second sliding platform that moves along the Z direction relative to the second support frame, a blind hole processing machine installed on the second sliding platform, and an anti-theft buckle processing machine installed on the second support frame; 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 a single head of an oilfield perforating gun 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 a single head of an oilfield perforating gun 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 a single head of an oilfield perforating gun according to claim 4, characterized in that: The pinion assembly of the keyway processing mechanism 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 middle pinions, the end bearings are mounted with shafts and the shafts are provided with end pinions, the starting pinion is meshed with the middle pinions, the adjacent middle pinions are meshed with each other, the last middle 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; an avoidance is provided on the upper cover at a position opposite to the starting pinion and the end pinion A 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. 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 numerical 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.

8. The all-in-one machine for processing blind holes, keyways and anti-theft buckles of a single head of an oilfield perforating gun 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 second support frame on the side opposite to the blind hole processing machine. A balancing cylinder is installed on the second support frame. The cylinder body of the balancing cylinder is fixed on the top of the second support frame. The end of the balancing cylinder telescopic rod is connected to the second sliding platform. The balancing cylinder nitrogen storage tank is connected to the balancing cylinder. The balancing cylinder is used to provide 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 a single head of an oilfield perforating gun according to claim 4, characterized in that: The blind hole depth measuring mechanism is mounted on a long connecting plate, which is fixed to the side of the blind hole processing machine. The blind hole depth measuring mechanism 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 blind hole processing depth is accurately recorded by the displacement sensor. The lower end of the telescopic portion of the telescopic rod is mounted on the long connecting plate through a guide seat. A pipe length measuring ruler assembly for measuring the length of the oilfield perforating gun is provided on the outside of the anti-theft buckle processing machine. The pipe length measuring ruler assembly is installed on the outside of the anti-theft buckle processing machine 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 a movable end plate that contacts the end face of the oilfield perforating gun and can be telescopic. A limit switch is provided on the other side of the movable end plate. The movable end plate is moved to contact the end face of the oilfield perforating gun and continues to drive the movable end plate to contact the limit switch. At this time, the length of the oilfield perforating gun is recorded.

10. A method for machining blind holes, keyways, and anti-theft buckles using a single-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 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 blind hole and anti-theft buckle processing mechanism to move longitudinally along the machine tool. When the tube length measuring ruler assembly is located outside the end surface of the oilfield perforating gun barrel, control the cylinder of the tube length measuring ruler assembly to operate so that the end surface measuring mechanism can contact the oilfield perforating gun. Then, control the blind hole and anti-theft buckle 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 ruler assembly to move away from the end surface of the oilfield perforating gun barrel. Step 5. Control the keyway machining mechanism so that the milling cutter assembly extends from the starting end of the oilfield perforating gun barrel into the interior of the oilfield perforating gun. When the measuring ruler contacts the inner wall of the oilfield perforating gun, the keyway milling cutter is controlled to work according to the machining depth to complete the keyway machining. After the keyway machining is completed, the keyway machining mechanism exits and returns to its original position. Step 6. The blind hole and anti-theft buckle processing mechanisms move longitudinally along the machine tool. The anti-theft buckle processing machine processes the anti-theft buckle at the end of the oilfield perforating gun barrel, and then the blind hole processing machine processes the blind holes. After processing a row of blind holes, the self-centering fixture returns to its original position. Then, the main clamping mechanism is controlled to clamp and rotate the oilfield perforating gun to process another row of blind holes. After all the blind holes in the phase sequence 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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