A push-pull assembly

Abstract

The utility model discloses a pushing assembly, comprising an upper joint of a pushing device, a pushing device shell is inserted at the rear side of the upper joint of the pushing device, a pushing short joint assembly is inserted in the pushing short joint shell for surveying downhole data, and a pushing lower joint is spirally installed at the tail end of the pushing short joint assembly. The utility model relates to the technical field of downhole exploration. The pushing assembly has a simple structure and is easy to manufacture, disassemble and repair. It can be fixed on the well wall through structures such as a thrust rod, a connecting rod, a main arm and an electrode assembly to judge the straightness of the well path, analyze the situation in the well through relevant sensors in the electric imaging electrode assembly, and form a visual survey result, which is mainly used for detecting distance.

Description

Technical Field

[0001] The utility model relates to the technical field of underground exploration, in particular to a pushing and leaning assembly. Background Art

[0002] As the exploration of oil and gas resources in the world increases, newly discovered oil and gas reservoirs tend to be smaller in scale and more complex in reservoir properties and structural morphology. The application of traditional conventional exploration technology and equipment to discover and evaluate such oil and gas reservoirs increases exploration costs and reduces benefits. Geologists and logging analysts have long dreamed of taking a camera to roam in the wellbore and carefully examine the underground stratum structure and fluid distribution. To this end, logging personnel have struggled for 70 years, and logging technology has also gone through four stages: analog logging, digital logging, CNC logging, and now push-pull assembly electrical imaging logging.

[0003] In order to better carry out downhole exploration work, the push-and-pull assembly is a necessary equipment for working deep in the well. The current logging instrument push-and-pull assembly has a complex structure, which not only increases the cost of use, but also is not conducive to production and maintenance. Therefore, a push-and-pull device with a simple structure is needed to better help people carry out exploration work. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pushing and leaning assembly, which solves the problem that the existing pushing and leaning equipment has a relatively complex structure.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a pushing assembly, including a pushing device upper joint, a pushing device shell is inserted on the rear side of the pushing device upper joint, a pushing device short section assembly is inserted in the pushing device shell for surveying downhole data, and a pushing device lower joint is spirally installed on the tail end of the pushing device short section assembly.

[0006] Preferably, the pushing short section assembly includes a pushing base, which is inserted into the outer shell of the pushing device, and a plurality of grooves are evenly distributed on the outer annular surface of the pushing base and located on one side close to the top, a survey arm is movably installed in the groove, a middle fixed head is inserted at the front end of the pushing base, an oil pipe is inserted in the pushing base, the oil pipe is connected to the middle fixed head, and the middle fixed head is communicated with the upper joint of the pushing device.

[0007] Preferably, a new large fixing ring is installed at the front end of the pushing base and located outside the middle fixed head. The new large fixing ring is placed inside the pushing device shell and connected to the upper joint of the pushing device. Small pushing disc springs are installed on the left and right sides of the new large fixing ring. A small disc spring retaining ring is installed at the top of the pushing small disc spring and located on the outer ring of the new large fixing ring. The small disc spring retaining ring is connected to the pushing device shell.

[0008] Preferably, the survey arm includes a sealing sleeve arranged in the groove, a connecting rod is movably installed in the sealing sleeve, a thrust rod is movably installed at the tail end of the connecting rod, a pole plate adapter is movably installed at the tail end of the thrust rod, a main arm is installed on the rear side of the pole plate adapter, a guide wheel is rotatably installed in the main arm, a pole plate connecting tube is installed at the rear end of the main arm, a pole plate assembly is installed at the bottom of the pole plate connecting tube, a support rod is movably installed at the bottom of the pole plate assembly, and the top end of the support rod is movably connected to the outer wall of the pushing base.

[0009] Preferably, the electrode assembly is provided with density sensors, AD acquisition chips, wellbore potentiometers and other related sensors, and the sensors inside the electrode plate can be replaced according to the different data collected by well logging to achieve the purpose of collecting different data.

[0010] Preferably, a protective cover is provided outside the pushing base and located at the groove, and a wire pressing piece is inserted between the protective cover and the pushing base and located near the bottom.

[0011] Preferably, a quick-turn nut is embedded in the tail end of the pushing base, and the pushing base is connected to the lower joint of the pushing device through the quick-turn nut. Beneficial Effects

[0012] The utility model provides a push-and-lean assembly. It has the following beneficial effects: the push-and-lean assembly has a simple structure, is easy to manufacture, disassemble and repair, can be fixed on the well wall through structures such as a thrust rod, a connecting rod, a main arm and a plate assembly, judges the straightness of the well path, analyzes the situation in the well through the electric imaging plate assembly, and forms a visual survey result. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a partial structural schematic diagram of the utility model.

[0015] Figure 3 It is a schematic diagram of the processing hole structure of the utility model.

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the processing hole position of the utility model.

[0017] Figure 5 It is a schematic diagram of the local cross-sectional structure of the processing hole position of the utility model.

[0018] Figure 6 It is a schematic diagram of a processing workbench of the utility model.

[0019] Figure 7It is a schematic diagram of a machining tool of the present utility model.

[0020] Figure 8 It is a cross-sectional schematic diagram of a machining tool of the present utility model.

[0021] Fig. 9 It is a cross-sectional schematic diagram of the utility model.

[0022] In the figure: 1. Pusher upper joint; 2. Pusher housing; 3. Pusher lower joint; 4. Pusher base; 5. Middle fixed head; 6. Oil pipe; 7. New large fixed ring; 8. Pusher small disc spring; 9. Small disc spring retaining ring; 10. Sealing sleeve; 11. Connecting rod; 12. Protective sleeve; 13. Plate adapter; 14. Main arm; 15. Guide wheel; 16. Plate connecting pipe; 17. Plate assembly; 18. Wire pressing piece; 19. Quick-screw nut. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and a suitable controller should be selected according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0025] See also Figure 1-9 The utility model provides a technical solution: a pusher assembly, including a pusher upper joint 1, a pusher shell 2 is inserted on the rear side of the pusher upper joint 1, a pusher short section assembly is inserted in the pusher shell 2 for surveying downhole data, and a pusher lower joint 3 is spirally installed on the tail end of the pusher short section assembly.

[0026] Embodiment 1: The pushing short section assembly includes a pushing base 4, which is inserted into the pushing device housing 2. A plurality of grooves are evenly spaced on the outer ring surface of the pushing base 4 and located on one side close to the top. A survey arm is movably installed in the groove. A middle fixed head 5 is inserted at the front end of the pushing base 4. An oil pipe 6 is inserted in the pushing base 4, and the oil pipe 6 is connected to the middle fixed head 5. The middle fixed head 5 is connected to the upper joint 1 of the pushing device.

[0027] A new large fixing ring 7 is installed at the front end of the pushing base 4 and outside the middle fixing head 5. The new large fixing ring 7 is placed inside the pushing device housing 2 and connected to the upper joint 1 of the pushing device. Pushing small disc springs 8 are installed on both sides of the new large fixing ring 7. A small disc spring retaining ring 9 is installed at the top of the pushing small disc spring 8 and located at the outer ring of the new large fixing ring 7. The small disc spring retaining ring 9 is connected to the pushing device housing 2;

[0028] Specifically, the push-pull assembly adopts an intermediate wire structure. The borehole diameter push-pull arm is connected to the imaging electrode plate device, which is responsible for pushing the electrode plate against the borehole wall during logging. The push-pull arms are independently retractable. Each set of push-pull arms is connected to a potentiometer to measure the borehole diameter value. There are a total of 6 borehole diameter potentiometers and 1 travel potentiometer. There are a total of 6 electrode plate devices installed, on which the electrode plate preamplifier circuit and two rows of ceramic button electrodes are installed, which are connected to the button electrode group through a 25-pin connector and a flexible connecting line. The electrode plate can swing within a range of 30° along the vertical axis direction.

[0029] The arm pin is made of beryllium bronze. When the arm encounters resistance, the arm pin will be sheared under 2000 pounds of force, thus protecting the instrument.

[0030] Embodiment 2: The survey arm comprises a sealing sleeve 10 arranged in the groove, a connecting rod 11 is movably installed in the sealing sleeve 10, a thrust rod is movably installed at the tail end of the connecting rod 11, a plate adapter 13 is movably installed at the tail end of the thrust rod, a main arm 14 is installed on the rear side of the plate adapter 13, a guide wheel 15 is rotatably installed in the main arm 14, a plate connecting pipe 16 is installed at the rear end of the main arm 14, a plate assembly 17 is installed at the bottom of the plate connecting pipe 16, a support rod is movably installed at the bottom of the plate assembly 17, and the top end of the support rod is movably connected to the outer wall of the push-against base 4;

[0031] Specifically, the survey arm is driven by a motor and gears, which is a conventional drive structure;

[0032] After connecting to 110VDC, the motor rotates forward, passes through the planetary gear reducer, and then passes through the torque limiter, anti-reverse brake, and ball screw to convert the rotational motion into axial linear motion, compressing the spring assembly, thereby pushing the push arm close to the well wall. When the stroke potentiometer shows that it is fully opened, the torque limiter protection is activated, and then the power is manually cut off. This is the action of the probe opening and pushing. When closing, the motor reverses, and the above driving process is reversed. The push arm is closed and clamped. When the stroke potentiometer shows that it is fully closed, the torque limiter protection is activated, and then the power is manually cut off.

[0033] The axial force generated by the spring assembly in the power-off state after being fully opened and the axial tension added to the ball screw by the motor in the power-off state after being fully retracted will cause the motor to rotate in the opposite direction through the ball screw and cannot self-lock. The function of the anti-reverse brake is to self-lock the motor and the ball screw shaft;

[0034] Due to the irregularity of the wellbore, the pressure of the six push arms against the well wall cannot be the same. When the pressure required by a certain push arm reaches a certain level, the disc spring will be compressed to relieve the pressure required by the push arm. When the push arm is opened, the lead screw and rolling nut drive the pressure plate to push the push arm outward. When the push arm is retracted, the pressure plate uses the recovery shaft ring to push the push arm to retract.

[0035] Specifically, the instrument is equipped with six push arms and pole plates, so that more accurate inclination calculations can be made compared to conventional four-arm inclination instruments. At the same time, more detailed wellbore geometry and more accurate wellbore volume can be calculated. When the invasion zone is relatively shallow or moderate, the instrument can not only provide imaging data, but also provide quantitative azimuthal distribution of formations in horizontal wells through calculations. When pressed against the well wall, the six push arms can achieve independent movement through disc spring devices. Six borehole potentiometers and one stroke potentiometer are installed in the pusher. The borehole potentiometer is used to provide voltage measurement, which is used to measure the radial position of each push arm from the central axis of the pusher. The stroke potentiometer provides a voltage measurement, which is used to monitor the pressure applied to the push arm connection mechanism when the push arm is extended and retracted. The instrument has no travel switch and cannot be automatically powered off, which needs to be done manually.

[0036] The electrode assembly 17 is provided with density sensors, AD acquisition chips, well diameter potentiometers and other related sensors.

[0037] Specifically, the thrust rod, connecting rod 11, main arm 14 and plate assembly 17 and other structures can be fixed on the well wall to determine the straightness of the well path, and the situation in the well can be analyzed through the electrical imaging plate assembly to form a visual survey result;

[0038] Specifically, the electrode assembly 17 is also provided with a temperature sensor, a rock geological sensor and an oil and gas sensor.

[0039] A protective cover 12 is disposed outside the pushing base 4 and located at the groove, and a wire pressing piece 18 is inserted between the protective cover 12 and the pushing base 4 and located near the bottom.

[0040] A quick-screw nut 19 is embedded at the rear end of the pushing base 4 , and the pushing base 4 is connected to the lower joint 3 of the pushing device through the quick-screw nut 19 .

[0041] Embodiment 3: The processing technology of the push-pull assembly is as follows:

[0042] like Figure 3-6 As shown in the figure, the previous push-to-leave base body is made by welding two bodies. After the head sealing hole on the left end is processed, the main base body on the right end is welded firmly. After welding, the main body body is processed uniformly. This processing method has certain risks in welding, after all, the strength of the welded material is slightly lower than the strength of the original body.

[0043] In order to overcome the above existing background, the utility model provides a method and tooling for processing a well logging instrument electrical imaging push-to-base reverse hole. This effectively improves efficiency, saves costs, ensures processing accuracy, and forms a unique processing method of our company. Therefore, we use a special processing technology that does not use welding. Instead, it processes on the base itself. In order to achieve the above purpose, the utility model adopts the following technical solutions, and the specific methods are as follows:

[0044] A method and tooling for processing a reverse hole of a well logging instrument electrical imaging push-to-base body comprises three-coordinate gun drilling equipment, a push-to-base body, self-made cutting tools of various specifications, a self-made gun drill rod, a straightening sleeve, a cooling system, a fixture and other parts.

[0045] This tool is independently processed and designed by our company. There are 6 processing tools in total: 2 roughing tools, 2 finishing reamers, and 2 chamfering tools. Each tool is finished by CNC lathe. The groove of the tool welding YG8 tool block is finished by machining center. After welding the tool block, the tool is finished by cylindrical grinder, and the tool is checked with micrometer to meet the drawing size. The gun barrel requires quenching and tempering to increase the hardness and meet the relevant requirements. The gun barrel and the tool are continuous with left-handed thread, so that when the gun drill is reversed, no reverse force will be generated during normal processing. Let the drill bit get tighter and tighter without falling off.

[0046] Specifically, 1. Preparation: Place the push-to-base body on the processing platform of the gun drilling equipment.

[0047] 2. Tool making: Use relevant high-quality tool steel materials for processing, and use CNC lathes, machining centers and other equipment to complete the tool processing. Use gas welding to weld the carbide tool block to the tool body, and use a cylindrical grinder to process the tool to make the tool size meet the requirements of the drawing. After the welding tool block is finished, use a cylindrical grinder to fine-process the tool, and use a micrometer to check that the tool is required to meet the drawing size. The gun barrel requires quenching and tempering to increase the hardness and meet the relevant requirements. The gun barrel and the tool use left-handed threads continuously, so that when the gun drill is reversed, no reverse force will be generated during normal processing. Let the drill bit get tighter and tighter without falling off.

[0048] 3. Tool installation: The tool, gun rod and straightening sleeve are installed as a whole. It is fixed on the feed head of the gun drilling equipment according to the interface of the gun drilling equipment.

[0049] 4. Working process: During the feeding process, the coolant is continuously poured to keep the tool lubricated and cooled to achieve the purpose of processing. The processing depth can be completed according to the digital display size on the equipment display screen, and the feed speed can be controlled by the variable frequency motor. The processing effect can be adjusted by your own processing experience.

[0050] The above embodiments are implemented on the premise of the technical solution of the utility model, and detailed implementation methods and specific operation processes are given, but the protection scope of the utility model is not limited to the above embodiments. The methods used in the above embodiments are conventional methods unless otherwise specified.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A push-to-leave assembly, characterized in that: The pusher upper joint (1) comprises a pusher outer shell (2) inserted at the rear side of the pusher upper joint (1), a pusher short joint assembly for surveying downhole data inserted in the pusher outer shell (2), and a pusher lower joint (3) spirally installed at the rear end of the pusher short joint assembly.

2. A push-to-leave assembly according to claim 1, characterized in that The push-against short section assembly comprises a push-against base (4), the push-against base (4) is inserted into the push-against housing (2), a plurality of grooves are evenly spaced on the outer annular surface of the push-against base (4) and located on one side close to the top, a survey arm is movably installed in the groove, a middle fixed head (5) is inserted at the front end of the push-against base (4), an oil pipe (6) is inserted in the push-against base (4), the oil pipe (6) is connected to the middle fixed head (5), and the middle fixed head (5) is connected to the upper joint (1) of the push-against device.

3. A push-to-leave assembly according to claim 2, characterized in that A new large fixing ring (7) is installed at the front end of the pushing base (4) and outside the middle fixing head (5). The new large fixing ring (7) is placed inside the pushing device housing (2) and connected to the pushing device upper joint (1). Pushing small disc springs (8) are installed on both sides of the new large fixing ring (7). A small disc spring retaining ring (9) is installed at the top of the pushing small disc spring (8) and at the outer ring of the new large fixing ring (7). The small disc spring retaining ring (9) is connected to the pushing device housing (2).

4. A push-to-leave assembly according to claim 2, characterized in that The survey arm comprises a sealing sleeve (10) arranged in the groove, a connecting rod (11) is movably installed in the sealing sleeve (10), a thrust rod is movably installed at the tail end of the connecting rod (11), a plate adapter (13) is movably installed at the tail end of the thrust rod, a main arm (14) is installed at the rear side of the plate adapter (13), a guide wheel (15) is rotatably installed in the main arm (14), a plate connecting pipe (16) is installed at the rear end of the main arm (14), a plate assembly (17) is installed at the bottom of the plate connecting pipe (16), a support rod is movably installed at the bottom of the plate assembly (17), and the top end of the support rod is movably connected to the outer wall of the push base (4).

5. A push-to-leave assembly according to claim 4, characterized in that The electrode assembly (17) is provided with a density sensor, an AD acquisition chip and a well diameter potentiometer.

6. A push-to-leave assembly according to claim 2, characterized in that A protective sleeve (12) is provided outside the pushing base (4) and located at the groove, and a wire pressing piece (18) is inserted between the protective sleeve (12) and the pushing base (4) and located near the bottom.

7. A push-to-leave assembly according to claim 2, characterized in that A quick-screw nut (19) is embedded at the rear end of the pushing base (4), and the pushing base (4) is connected to the lower joint (3) of the pushing device via the quick-screw nut (19).

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