Dismounting device

Abstract

The invention relates to the technical field of petroleum well logging, in particular to a dismounting device. The inner side of the threaded sleeve is rotationally connected with the handle, and the outer side of the threaded sleeve is rotationally connected with a lower connector; the connecting assembly is arranged in the handle in a penetrating mode and used for being connected with a pressure bearing disc. Wherein one end face of the handle is provided with a rotation limiting key groove, the rotation limiting key groove is used for being embedded with a tongue key of the pressure-bearing disc, and the handle and the connecting assembly can move in the axial direction of the threaded sleeve by rotating the threaded sleeve so as to mount or dismount the pressure-bearing disc. When the threaded sleeve is rotated to enable the handle and the connecting assembly to move in the axial direction of the threaded sleeve so as to mount or dismount the pressure-bearing disc, the direction of the pressure-bearing disc can be adjusted by rotating the handle. The problems that according to an existing pressure-bearing disc disassembling and assembling tool, the direction of a pressure-bearing disc is not easy to adjust, and the thread connecting part is prone to the buckle sliding phenomenon can be solved, and the convenience of mounting of the pressure-bearing disc is improved.

Description

Technical Field

[0001] The present invention relates to the field of petroleum well logging technology, and in particular to a disassembler. Background Technology

[0002] Well logging is a method of measuring geophysical parameters by using the geophysical properties of rock formations, such as electrochemical properties, electrical conductivity, acoustic properties, and radioactivity. It is one of the applied geophysical methods. When drilling for oil, logging must be performed after drilling to the designed well depth.

[0003] Currently, direct push storage logging technology and pump-out logging technology are widely used. In actual projects, both logging technologies may cause logging instrument damage. In order to reduce the system risk caused by local damage to the logging instrument string, the logging instruments / equipment are designed and installed with pressure plates to prevent flooding and isolate the convection of liquid in short sections.

[0004] During well logging, it is often necessary to install and remove the pressure plate. However, the friction resistance during installation and removal of the pressure plate is relatively large, so special tools are usually required to install and remove the pressure plate. Currently, most conventional pressure plate installation and removal tools have problems such as difficulty in adjusting the direction of the pressure plate and easy slippage of the threaded connection parts. SUMMARY OF THE INVENTION

[0005] The embodiment of the present invention provides a disassembler that can solve the problems of the existing pressure plate disassembly tool, such as the difficulty in adjusting the direction of the pressure plate and the slippage phenomenon of the threaded connection part.

[0006] The embodiment of the present application provides a disassembler, including:

[0007] Handle;

[0008] The inner side of the screw sleeve is rotatably connected to the handle, and the outer side is used for rotatably connecting to the lower joint; and

[0009] A connecting component is inserted into the handle and is used to connect with the pressure plate;

[0010] Wherein, a rotation-limiting key groove is provided on one end surface of the handle, and the rotation-limiting key groove is used to engage with the tongue key of the pressure plate. Rotating the screw sleeve can make the handle and the connecting assembly move along the axial direction of the screw sleeve to install or remove the pressure plate.

[0011] In one embodiment, the handle includes a fitting section and a connecting section; the fitting section is provided with the rotation-limiting keyway, the connecting section is provided with a connecting portion and an abutting portion, the connecting portion is rotationally connected to the inner side of the screw sleeve, and the abutting portion abuts against the side surface of the screw sleeve.

[0012] In one embodiment, the connecting component includes a connecting head and a mandrel; one end of the connecting head is connected to the mandrel, and the other end of the connecting head is for connecting to the pressure-bearing disc. Wherein, a rotation limiting member is provided between the connecting head and the mandrel to limit the relative rotation between the connecting head and the mandrel.

[0013] In one embodiment, the handle includes a limiting section and a moving limiting member. A limiting hole is provided on the limiting section, and a limiting ring groove is provided on the mandrel;

[0014] The moving limiting member is inserted into the limiting ring groove through the limiting hole to limit the movement of the mandrel.

[0015] In one embodiment, the limiting ring groove has a preset width.

[0016] In one embodiment, the rotation limiting member is a screw, and the moving limiting member is a screw.

[0017] In one embodiment, the mandrel includes a shaft body section and a holding section.

[0018] In one embodiment, the diameter of the holding section is greater than the diameter of the mandrel.

[0019] In one embodiment, the connecting component includes an impact ring, and the impact ring is sleeved on the mandrel.

[0020] In one embodiment, a first positioning mark is provided on the handle.

[0021] Compared with the prior art, in the embodiment of the present application, by providing a rotation limiting key groove on one end face of the handle, and fitting the rotation limiting key groove with the tongue key of the pressure-bearing disc, when rotating the screw sleeve to move the handle and the connecting component along the axial direction of the screw sleeve to install or disassemble the pressure-bearing disc, the direction of the pressure-bearing disc can be adjusted by rotating the handle, which can solve the problems existing in the existing pressure-bearing disc disassembly and assembly tools, such as the difficulty in adjusting the direction of the pressure-bearing disc and the easy occurrence of slipping of the threaded connection part, etc., and improves the convenience of installing the pressure-bearing disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the drawings.

[0023] Figure 1 is a schematic structural diagram of a disassembling and assembling tool provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of the disassembling and assembling tool and the lower joint assembled provided by an embodiment of the present invention;

[0025] Figure 3It is an external assembly drawing of a dismounting tool and a lower sub provided by an embodiment of the present invention.

[0026] Reference numerals:

[0027] 10. Handle; 110. Fitting section; 1101. Rotation limiting keyway; 120. Connection section; 1201. Connection part; 1202. Abutting part; 130. Limiting section; 1301. Limiting hole; 1302. Moving limiting part

[0028] 20. Spiral sleeve

[0029] 30. Connection assembly; 310. Connector; 320. Core shaft; 3201. Shaft body section; 32011. Limiting ring groove; 3202. Holding section; 330. Rotation limiting part; 340. First positioning mark

[0030] 40. Impact ring

[0031] 50. Pressure-bearing disc

[0032] 60. Lower sub; 610. Second positioning mark Detailed implementation manners

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] Well logging, also called geophysical well logging, is a method of measuring geophysical parameters by using the electrochemical properties, electrical conductivity, acoustic properties, radioactivity and other geophysical properties of rock formations, and belongs to one of the applied geophysical methods. During oil drilling, well logging must be carried out after drilling to the designed well depth, also known as completion electric logging, to obtain various petroleum geological and engineering technical data as the original data for well completion and oilfield development. This kind of well logging is customarily called open-hole well logging. The second series of well logging carried out after the casing is run into the oil well is customarily called production well logging or development well logging. The development of production well logging has generally gone through four stages: analog well logging, digital well logging, numerical control well logging, and imaging well logging.

[0035] To meet the well logging construction of complex wells, the currently more commonly used are the direct push storage well logging technology and the pump-out well logging technology. These two well logging processes have the situation of well logging instrument damage under extreme conditions. To reduce the system risk caused by local damage of the well logging instrument string, pressure-bearing discs need to be designed and installed on well logging equipment to prevent flooding and isolate the convection of liquids between short joints.

[0036] The pressure-bearing disc usually adopts a glass sintering process for double-directional sealed pressure bearing. To meet the non-leakage phenomenon under high-temperature and high-pressure working conditions, double seals are installed on the pressure-bearing disc. Due to the small gap between the seal hole and the shaft, the compression amount of the seal ring is large, increasing the frictional resistance during assembly and disassembly. Usually, special tools are required for installation and disassembly.

[0037] The existing pressure plate removal tool first connects the pressure plate removal tool to the pressure plate through threads, rotates the threaded ring on the pressure plate removal tool to make the threaded ring connect with the sealing hole, and presses the pressure plate into the sealing hole by the axial force of the thread. After it is in place, rotate the pressure plate removal tool to separate from the pressure plate to complete the assembly. When disassembling, the process is reversed. First, rotate the threaded ring on the pressure plate removal tool into the sealing hole, rotate the pressure plate removal tool so that its front thread is connected with the pressure plate, and rotate the threaded ring to take out the tool and the sealing plate together.

[0038] However, the existing pressure plate removal tools have the following problems: 1. After the pressure plate removal tool is threadedly connected to the pressure plate, the pressure plate removal tool has no anti-rotation function and is prone to slipping; during the installation of the pressure plate, it is difficult to adjust the direction of the pressure plate; 2. If the pressure plate is not installed in place, it needs to be knocked again after installation to be fully in place; 3. When the front end of the pressure plate removal tool is installed with the pressure plate connection thread, it is subjected to a large force, the thread is severely worn, and it is easy to slip.

[0039] For the above technical issues, such as Figure 1 、 Figure 2 As shown, the embodiment of the present application provides a disassembler, including:

[0040] Handle 10;

[0041] The inner side of the screw sleeve 20 is rotatably connected to the handle 10, and the outer side is used to be rotatably connected to the lower joint 60; and

[0042] The connecting component 30 is inserted into the handle 10 and is used to connect with the pressure plate 50;

[0043] A rotation-limiting key groove 1101 is provided on one end surface of the handle 10, and the rotation-limiting key groove 1101 is used to engage with the tongue key of the pressure plate 50. Rotating the screw sleeve 20 can make the handle 10 and the connecting assembly 30 move along the axial direction of the screw sleeve 20 to install or remove the pressure plate 50.

[0044] It should be noted that the pressure plate 50 is usually installed in the lower joint 60. During installation, the left end of the connecting assembly 30 is first threadedly connected to the pressure plate 50, and then the disassembler is inserted into the lower joint 60 and connected to the lower joint 60 through the external thread of the threaded sleeve 20.

[0045] It should be noted that both ends of the connecting component 30 extend out of the two end faces of the handle 10. The left end of the connecting component 30 is threadedly connected to the pressure-bearing disc 50, and the right end of the connecting component 30 can be held by the user. A rotation-limiting key groove 1101 is provided on the left end face of the handle 10. When installing or disassembling the pressure-bearing disc 50, the tongue key of the pressure-bearing disc 50 can be fitted into the rotation-limiting key groove 1101 on the left end face of the handle 10. In this way, when installing or disassembling the pressure-bearing disc 50 by rotating the screw sleeve 20, relative rotation between the handle 10, the connecting component 30 and the pressure-bearing disc 50 can be avoided. At the same time, by adjusting the angles of the handle 10 and the connecting component 30, the pressure-bearing disc 50 can be rotated, so as to adjust the angle of the pressure-bearing disc 50.

[0046] In some embodiments, the handle 10 includes a fitting section 110 and a connecting section 120. A rotation-limiting key groove 1101 is provided on the fitting section 110. A connecting portion 1201 and an abutting portion 1202 are provided on the connecting section 120. The connecting portion 1201 is rotatably connected to the inner side of the screw sleeve 20, and the abutting portion 1202 abuts against the side surface of the screw sleeve 20.

[0047] It should be noted that, as Figure 1 , Figure 2 shown, a rotation-limiting key groove 1101 is provided on the outer wall of the fitting section 110. The size of the rotation-limiting key groove 1101 is adapted to the size of the tongue key of the pressure-bearing disc 50. The right end face of the screw sleeve 20 abuts against the abutting portion 1202. When installing the pressure-bearing disc 50 and rotating the screw sleeve 20, the axial force generated by the rotating shaft sleeve can be transmitted to the pressure-bearing disc 50 through threaded connection and the abutting portion 1202, so as to install the pressure-bearing disc 50 into the lower joint 60. Usually, the abutting portion 1202 is higher than the connecting portion 1201.

[0048] In some embodiments, the connecting component 30 includes a connecting head 310 and a core shaft 320. One end of the connecting head 310 is connected to the core shaft 320, and the other end of the connecting head 310 is used to be connected to the pressure-bearing disc 50. Among them, a rotation-limiting member 330 is provided between the connecting head 310 and the core shaft 320 to limit the relative rotation between the connecting head 310 and the core shaft 320.

[0049] It should be noted that the core shaft 320 has a hollow connecting hole inside. The left end of the connecting head 310 is threadedly connected to the pressure-bearing disc 50, and the right end of the connecting head 310 is threadedly connected to the inner side of the left end of the core shaft 320. By providing a rotation-limiting member 330 between the core shaft 320 and the connecting head 310, the relative rotation between the connecting head 310 and the core shaft 320 can be limited, so that when connecting the core shaft 320 and the pressure-bearing disc 50 and rotating the core shaft 320 to connect the connecting head 310 and the pressure-bearing disc 50, the core shaft 320 and the connecting head 310 will not rotate relative to each other.

[0050] In some embodiments, the handle 10 includes a limiting section 130 and a movable limiting member 1302. The limiting section 130 is provided with a limiting hole 1301, and the core shaft 320 is provided with a limiting ring groove 32011; the movable limiting member 1302 is inserted into the limiting ring groove 32011 through the limiting hole 1301 to limit the movement of the core shaft 320.

[0051] In some embodiments, the limiting ring groove 32011 has a preset width.

[0052] It should be noted that the limiting section 130 is usually located on the right side of the abutment portion 1202, and the engaging section 110 is usually located on the left side of the abutment portion 1202. The position of the limiting hole 1301 on the limiting section 130 corresponds to the position of the limiting ring groove 32011 on the core shaft 320, that is, they are at the same position in the lateral direction. The limiting ring groove 32011 is an annular groove provided on the core shaft 320. By inserting the movable limiting member 1302 into the limiting ring groove 32011 through the limiting hole 1301, the lateral displacement of the handle 10 and the connecting assembly 30 can be limited when the screw sleeve 20 is rotated to make the handle 10 and the connecting assembly 30 move lateraly. Usually, the width of the limiting ring groove 32011 is greater than the diameter of the limiting hole 1301. The width of the limiting ring groove 32011 can be 10 to 50 cm, and can also be adjusted according to actual needs. The width of the limiting ring groove 32011 is not specifically limited in this application.

[0053] In some embodiments, the rotation limiter 330 is a screw, and the movement limiter 1302 is a screw.

[0054] It should be noted that using screws as the rotation limiter 330 and the movable limiter 1302 is simple, convenient and low-cost. The specifications and sizes of the screws can be selected according to actual needs, such as the rotation limiter 330 is an M5*8 screw and the movable limiter 1302 is an M10*12 screw; two rotation limiters 330 and / or movable limiters 1302 can be selected and the two rotation limiters 330 and / or movable limiters 1302 can be evenly distributed around the circumference, so that the force is more uniform.

[0055] In some embodiments, the core shaft 320 includes a shaft section 3201 and a grip section 3202.

[0056] In some embodiments, the diameter of the gripping section 3202 is greater than the diameter of the mandrel 320.

[0057] It should be noted that the shaft section 3201 is located on the left side, and the grip section 3202 is located on the right side. The grip section 3202 can be held by the user. The lengths of the shaft section 3201 and the grip section 3202 can be set as needed. The shape of the grip section 3202 can be set according to the user's ergonomic principles to facilitate holding. This embodiment of the application does not specifically limit this. ​​​​

[0058] In some embodiments, the connecting component 30 includes an impact ring 40, and the impact ring 40 is sleeved on the mandrel 320.

[0059] It should be noted that the impact ring 40 is located between the holding section 3202 and the limiting section 130 of the handle 10 and can slide along the mandrel 320. Among them, the diameters of the limiting section 130 and the holding section 3202 are greater than the diameter of the mandrel 320, so that when the impact ring 40 slides along the mandrel 320, it can hit the left end face of the limiting section 130 and transmit the force generated by the impact to the pressure-bearing disc 50 connected to the right end of the handle 10. Such a setting can be adjusted and relieved by the impact of the impact ring 40 when the pressure-bearing disc 50 is not installed in place or jammed.

[0060] In some embodiments, a first positioning mark 340 is provided on the handle 10.

[0061] It should be noted that a second positioning mark 610 is usually provided on the lower joint 60. When assembling the dismounting tool, first, the pressure-bearing disc 50 with the sealing ring installed is fitted into the rotation-limiting key groove 1101 on the handle 10 to prevent the pressure-bearing disc 50 from rotating during installation or disassembly. Rotate the mandrel 320 to thread-connect the connecting head 310 with the center of the pressure-bearing disc 50, and install the dismounting tool together with the pressure-bearing disc 50 into the sealing hole of the lower joint 60. During assembly, the first positioning mark 340 on the handle 10 needs to be aligned with the second positioning mark 610 on the lower joint 60. As Figure 3 shown, rotate the handle 10 to confirm whether it can rotate. If it cannot rotate, it means that the tongue key of the pressure-bearing disc 50 has been installed in the rotation-limiting key groove 1101, and the next step of installation or disassembly can be carried out. If it can rotate, it means that the tongue key of the pressure-bearing disc 50 has not been installed in the rotation-limiting key groove 1101, and adjustment is required.

[0062] It should be noted that the first positioning mark 340 and the second positioning mark 610 can be marking grooves, which are not easily scratched off during use and are easy to be preserved and used for a long time.

[0063] In summary, in the embodiment of the present application, by providing the rotation-limiting key groove 1101 on one end face of the handle 10 and fitting the rotation-limiting key groove 1101 with the tongue key of the pressure-bearing disc 50, when rotating the screw sleeve 20 to move the handle 10 and the connecting component 30 along the axial direction of the screw sleeve 20 to install or disassemble the pressure-bearing disc 50, the direction of the pressure-bearing disc 50 can be adjusted by rotating the handle 10, which can solve the problems existing in the existing dismounting tool for the pressure-bearing disc 50, such as the direction of the pressure-bearing disc 50 is not easy to be adjusted and the thread connection part 1201 is prone to slipping, etc., and improves the convenience of installing the pressure-bearing disc 50.

[0064] It should be understood that in the description of the present invention, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0065] In the description of the present invention, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature.

[0066] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0068] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A disassembler, characterized in that: include: handle; A screw sleeve, the inner side of which is rotatably connected to the handle, and the outer side of which is rotatably connected to the lower joint; as well as A connecting assembly, which is inserted into the handle and is used to connect with the pressure plate; Among them, a rotation limiting key groove is provided on one end surface of the handle, and the rotation limiting key groove is used to engage with the tongue key of the pressure plate. Rotating the screw sleeve can make the handle and the connecting assembly move along the axial direction of the screw sleeve to install or remove the pressure plate.

2. The disassembler according to claim 1, characterized in that: The handle comprises a fitting section and a connecting section; The interlocking section is provided with the rotation-limiting key groove, and the connecting section is provided with a connecting portion and an abutting portion, wherein the connecting portion is rotationally connected to the inner side of the screw sleeve, and the abutting portion abuts against the side surface of the screw sleeve.

3. The disassembler according to claim 1, characterized in that: The connecting assembly comprises a connecting head and a core shaft; One end of the connector is connected to the core shaft, and the other end of the connector is used to be connected to the pressure plate, wherein a rotation limiter is provided between the connector and the core shaft to limit the relative rotation between the connector and the core shaft.

4. The disassembler according to claim 3, characterized in that: The handle comprises a limiting section and a movable limiting member, the limiting section is provided with a limiting hole, and the core shaft is provided with a limiting ring groove; The movable limiting member is inserted into the limiting ring groove through the limiting hole to limit the movement of the core shaft.

5. The disassembler according to claim 4, characterized in that: The limiting ring groove has a preset width.

6. The disassembler according to claim 4, characterized in that: The rotation limiting member is a screw, and the movement limiting member is a screw.

7. The disassembler according to claim 3, characterized in that: The core shaft comprises a shaft body section and a grip section.

8. The disassembler according to claim 7, characterized in that: The diameter of the gripping section is greater than the diameter of the core shaft.

9. The disassembler according to any one of claims 3 to 8, characterized in that: The connecting assembly comprises an impact ring which is sleeved on the core shaft.

10. The disassembler according to claim 1, characterized in that: A first positioning mark is provided on the handle.

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