Combined fishing tool special for instrument with steel wire cable falling into well

Abstract

A combined fishing tool special for a well falling instrument with a steel wire cable belongs to the technical field of oil gas well logging engineering and comprises a fishing socket body and a pressing connection short section, the fishing socket body is connected with the lower end of the pressing connection short section, and the upper end of the pressing connection short section is connected with an oscillation tool. And the upper end of the fishing socket main body is provided with connecting threads of the fishing socket main body and the pressing connecting short section. The lower end of the pressing connecting short section is provided with pressing connecting short section and fishing socket body connecting threads, and the upper end of the pressing connecting short section is provided with pressing connecting short section and oscillation tool connecting threads. And the overshot main body is connected with the pressing connecting short section connecting thread and the pressing connecting short section is connected with the overshot main body connecting thread. And the pressing connecting short section and the oscillating tool connecting thread are connected with the oscillating tool thread. The problems of classified salvaging and salvaging tool replacement in a salvaging construction site are solved, salvaging of different types of well-falling instruments with steel wire cables can be completed by descending one salvaging tool into a well, the labor intensity is reduced, and the actual effect of field work is improved.

Description

Technical Field

[0001] This invention belongs to the field of oil, gas and water well logging engineering technology, and specifically relates to a special retrieval tool for a combined well-feeding instrument with steel wire cable. Background Technology

[0002] In the oil well logging industry, engineering logging instruments may become stuck downhole, or the logging instrument carrying the logging wire cable may fall into the well. While internal hook-type retrieval anchors and flat-mouth chucks with built-in retrieval cylinders can be used to retrieve them, the following problems arise during the on-site retrieval process:

[0003] The well-diving instrument carrying a long steel wire cable will form a clump of steel wire cable inside the well after it is lowered into the well. At this time, the internal hook-type retrieval anchor can be used to successfully retrieve it.

[0004] However, when a small number of broken steel wire cables are carried on the top of the wellhead instrument, the steel wire cables cannot form a clump inside the wellbore, and the inside hook type fishing anchor cannot retrieve the fallen steel wire cables. Due to the limitations of the downhole water distribution tool and the technical size parameters of the flat-mouthed toothed fishing tube, as well as the natural elastic interference of a small number of broken steel wire cables, the wellhead instrument cannot be retrieved. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a combined retrieval tool for well-feeding instruments with steel wire cables, comprising a retrieval cylinder body and a clamping connecting section. The retrieval cylinder body is connected to the lower end of the clamping connecting section, and the upper end of the clamping connecting section is connected to an oscillating tool.

[0006] Furthermore, the upper end of the retrieval cylinder body is provided with a connecting thread between the retrieval cylinder body and the clamping connecting short section.

[0007] Furthermore, the lower end of the clamping connecting section is provided with a thread connecting the clamping connecting section to the main body of the retrieval cylinder, and the upper end of the clamping connecting section is provided with a thread connecting the clamping connecting section to the oscillation tool.

[0008] Furthermore, the main body of the salvage cylinder is connected to the clamping connection short section via a threaded connection.

[0009] Furthermore, the clamping connection section is connected to the oscillating tool via a threaded connection.

[0010] Furthermore, the center of the clamping connecting section is provided with a working channel for the jaw plate reset piston rod, and the center of the retrieval cylinder body is provided with a working channel for the jaw plate reset piston. The working channel for the jaw plate reset piston rod is connected to the working channel for the jaw plate reset piston.

[0011] Furthermore, the main body of the retrieval cylinder includes a toothed plate reset piston rod and a toothed plate reset piston. The toothed plate reset piston rod is movably disposed in the working channel of the toothed plate reset piston rod, and a toothed plate reset piston is disposed at the lower end of the toothed plate reset piston rod. The toothed plate reset piston rod and the toothed plate reset piston are movably disposed in the working channel of the toothed plate reset piston.

[0012] Furthermore, a retaining plate return spring is sleeved on the retaining plate return piston rod. The upper end of the retaining plate return spring is connected to the lower end face of the pressing connection short section, and the lower end of the retaining plate return spring is connected to the upper end face of the retaining plate return piston.

[0013] Furthermore, the lower end face of the toothed plate reset piston is connected to the semi-cylindrical toothed plate body.

[0014] Furthermore, the lower part of the semi-cylindrical clamp body is provided with a first central through hole, and the side wall is symmetrically provided with clamp steel wire cable passage grooves, which are connected to the first central through hole.

[0015] Furthermore, the inner wall of the semi-cylindrical locking plate body is provided with locking teeth.

[0016] Furthermore, a second central through hole is provided at the lower part of the main body of the retrieval cylinder, and symmetrical grooves for the steel wire cable of the main body of the retrieval cylinder are provided on the side wall, and the grooves for the steel wire cable of the main body of the retrieval cylinder are connected to the second central through hole.

[0017] Furthermore, the main body steel wire cable of the retrieval cylinder is connected to the clamping plate steel wire cable through the groove at the same position.

[0018] Furthermore, the semi-cylindrical toothed plate body is disposed in the second central through hole.

[0019] Furthermore, the main body steel wire cable of the retrieval cylinder is connected to the clamping plate steel wire cable through the groove at the same position.

[0020] Furthermore, the first central through hole and the second central through hole are located at the same position and connected.

[0021] Furthermore, a center positioning groove is provided at the bottom where the first center through hole and the second center through hole are connected.

[0022] Furthermore, a hemispherical guide groove is provided at the bottom of the main body of the salvage cylinder.

[0023] Furthermore, a steel wire cable spool retrieval hook is provided at the bottom of the retrieval cylinder body.

[0024] Furthermore, a steel wire cable retrieval hook groove is formed between the steel wire cable retrieval hook and the hemispherical guide groove.

[0025] The beneficial effects of this invention are as follows:

[0026] The combined well-featured retrieval tool with steel wire cable provided by this invention has the following functional design features:

[0027] 1. The modular retrieval design integrates an internal hook-type steel wire cable retrieval anchor and a flat-mouthed clamp with a built-in retrieval cylinder, solving the problems of classified retrieval and tool replacement at the retrieval construction site. One retrieval tool can be used to retrieve different types of instruments with steel wire cables, reducing labor intensity and improving on-site work efficiency.

[0028] 2. The ingenious design of the guide groove, the central positioning groove, and the cable passage groove effectively eliminates the elastic interference of the steel wire cable itself and the inherent technical parameter limitations of the retrieval tools and water distribution tools when retrieving instruments carrying a small number of broken steel wire cables. This solves the problem that the retrieval instrument is blocked from entering the retrieval tube due to the inherent technical parameter limitations of the retrieval tube and the elastic interference of the small number of broken steel wire cables it carries, thus improving the retrieval success rate.

[0029] 3. Good safety performance: The main body of the retrieval cylinder, the steel wire cable spool retrieval hook, the steel wire cable retrieval hook groove, and the clamping connection short section are all made of 45# steel, which has strong impact resistance, strong deformation resistance, and strong load-bearing capacity. Attached Figure Description

[0030] Figure 1 This is an assembly diagram of the present invention;

[0031] Figure 2 This is an assembly drawing of the parts for this invention;

[0032] Figure 3 This is a schematic diagram of the structure of the existing device of the present invention.

[0033] The attached figures are labeled as follows:

[0034] 101. Salvage tube body; 102. Salvage tube body steel wire cable passage groove; 103. Center positioning groove; 104. Hemispherical guide groove; 105. Steel wire cable coil salvage hook; 106. Salvage tube body and clamping connection short section connection thread; 107. Steel wire cable salvage hook groove; 108. Clamping plate reset piston working channel; 109. Second center through hole; 201. Semi-cylindrical clamping plate body; 202. Clamping plate steel wire cable passage groove; 203. Clamping plate; 204. First center through hole; 301. Clamping plate reset spring; 401. Clamping plate reset piston rod; 402. Clamping plate reset piston; 501. Clamping connection short section; 502. Clamping connection short section and salvage tube body connection thread; 503. Clamping plate reset piston rod working channel; 504. Clamping connection short section and vibrating tool connection thread. Detailed Implementation

[0035] To make the technical means and objectives of this invention easier to understand, the invention is further described below with reference to specific embodiments. A combined well-feeding instrument with a steel wire cable is described below. Figures 1-2 As shown, it includes a retrieval cylinder body 101 and a clamping connecting section 501. The lower end of the retrieval cylinder body 101 is connected to the clamping connecting section 501, and the upper end of the clamping connecting section 501 is connected to the oscillating tool.

[0036] The upper end of the retrieval cylinder body 101 is provided with a connecting thread 106 between the retrieval cylinder body and the clamping connecting short section.

[0037] The lower end of the compression connecting section 501 is provided with a connecting thread 502 between the compression connecting section and the main body of the retrieval cylinder, and the upper end of the compression connecting section 501 is provided with a connecting thread 504 between the compression connecting section and the oscillating tool.

[0038] The main body of the retrieval cylinder is connected to the clamping connection short section via thread 106 and thread 502.

[0039] The clamping connection section is connected to the oscillating tool via a thread 504.

[0040] The clamping connecting section 501 has a center-mounted toothed plate reset piston rod working channel 503, and the retrieval cylinder body 101 has a center-mounted toothed plate reset piston working channel 108. The toothed plate reset piston rod working channel 503 and the toothed plate reset piston working channel 108 are connected.

[0041] The retrieval cylinder body 101 includes a toothed plate reset piston rod 401 and a toothed plate reset piston 402. The toothed plate reset piston rod 401 is movably disposed in the toothed plate reset piston rod working channel 503. The toothed plate reset piston 402 is disposed at the lower end of the toothed plate reset piston rod 401. The toothed plate reset piston rod 401 and the toothed plate reset piston 402 are movably disposed in the toothed plate reset piston working channel 108.

[0042] Wherein, a retaining plate reset spring 301 is sleeved on the retaining plate reset piston rod 401, the upper end of the retaining plate reset spring 301 is connected to the lower end face of the pressing connection short section 501, and the lower end of the retaining plate reset spring 301 is connected to the upper end face of the retaining plate reset piston 402.

[0043] The lower end face of the toothed plate reset piston 402 is connected to the semi-cylindrical toothed plate body 201.

[0044] The semi-cylindrical clamping plate body 201 has a first central through hole 204 at the lower part, and clamping plate steel wire cable passage grooves 202 are symmetrically arranged on the side wall. The clamping plate steel wire cable passage grooves 202 are connected to the first central through hole 204.

[0045] The inner wall of the semi-cylindrical locking plate body 201 is provided with locking teeth 203.

[0046] The lower part of the retrieval cylinder body 101 is provided with a second central through hole 109, and the side wall is symmetrically provided with retrieval cylinder body steel wire cable passage grooves 102, which are connected to the second central through hole 109.

[0047] The main steel wire cable of the retrieval cylinder is connected to the steel wire cable of the clamping plate through groove 202, with the groove 102 being aligned with the groove 202.

[0048] The semi-cylindrical toothed plate body 201 is disposed in the second central through hole 109.

[0049] The main steel wire cable of the retrieval cylinder is connected to the steel wire cable of the clamping plate through groove 202, with the groove 102 being aligned with the groove 202.

[0050] The first central through hole 204 and the second central through hole 109 are connected and overlap in position.

[0051] A central positioning groove 103 is provided at the bottom where the first central through hole 204 and the second central through hole 109 are connected.

[0052] The bottom of the retrieval cylinder body 101 is provided with a hemispherical guide groove 104.

[0053] The bottom of the retrieval cylinder body 101 is provided with a steel wire cable retrieval hook 105.

[0054] The steel wire cable retrieval hook 105 and the hemispherical guide groove 104 form a steel wire cable retrieval hook groove 107.

[0055] The purpose of this invention is to provide a special retrieval tool for combined logging instruments with steel wire cables that have been lowered into the well, which can effectively retrieve logging instruments that have been lowered into the well with logging steel wire cables.

[0056] The connection between the main body of the retrieval tube and the clamping connecting section thread 106 and the connection between the clamping connecting section and the main body of the retrieval tube thread 502 are screwed together. Two semi-cylindrical clamping plate bodies 201 are cylindrically encircled and installed at the bottom of the clamping plate reset piston working channel 108. The clamping plate reset piston 401 and the clamping plate reset spring 301 are installed in sequence. The upper end of the clamping plate reset piston rod 401 is placed in the clamping plate reset piston rod working channel 503. The connection between the clamping connecting section and the main body of the retrieval tube thread 502 and the connection between the main body of the retrieval tube and the clamping connecting section thread 106 are screwed together.

[0057] The two semi-cylindrical clamping plate bodies 201 include clamping plate steel wire cable passage groove 202, clamping teeth 203, and two cylindrical clamping plates 201 that are installed in a ring. They can move up and down in the clamping plate reset piston working channel 108. The clamping plate reset spring 301 pushes the clamping plate reset piston 402 to push the two cylindrical clamping plates 201 to the bottom of the clamping plate reset piston working channel 108, and automatically resets.

[0058] The toothed plate reset spring 301 is located in the working channel 108 of the toothed plate reset piston and is connected to the toothed plate reset piston rod 401 in a ring.

[0059] The toothed plate reset piston 402 is located in the toothed plate reset piston working channel 108. The piston end face is in contact with the upper end face of the semi-cylindrical toothed plate body 201 through the spring elastic push of the toothed plate reset spring 301, which is connected to the toothed plate reset piston rod 401 in a ring. The upper end of the toothed plate reset piston rod 401 is located in the toothed plate reset piston rod working channel 503. The toothed plate reset piston rod 401 moves up and down in the toothed plate reset piston rod working channel 503 by the spring elasticity of the toothed plate reset spring 301.

[0060] The clamping connection section 501 includes a clamping connection section connecting to the main body of the retrieval cylinder with a thread 502, a working channel 503 for the jaw plate reset piston rod, and a clamping connection section connecting to the oscillating tool with a thread 504. The connection is made by tightening the clamping connection section to the oscillating tool with the thread 504 and the connecting thread of the oscillating tool.

[0061] When the combined retrieval tool for the steel wire cable downhole instrument is working normally, it encounters a large number of clumps of steel wire cables piled up inside the well. The retrieval tool is lowered, and the steel wire cable clump retrieval hook 105 is inserted into the pile of steel wire cables inside the well. The steel wire cable enters the steel wire cable retrieval hook groove 107, and the retrieval tool is lifted to grab the downhole steel wire cable, thereby driving the downhole instrument upward and retrieving the downhole instrument with the steel wire cable.

[0062] When the combined retrieval tool for the steel wire cable downhole instrument is working normally, if it encounters a small number of broken steel wire cables carried on top of the downhole instrument inside the wellbore, the hemispherical guide groove 104 guides the retrieval tool to rotate around the broken steel wire cables. The broken steel wire cables sequentially enter the central positioning groove 103, the steel wire cable passage groove 102 of the retrieval cylinder body, and the steel wire cable passage groove 202 of the clamping plate, eliminating the natural elastic interference of the small number of broken steel wire cables. The retrieval tool then descends without interference, and the top of the downhole instrument... The fish-shaped retrieval tool enters the cylindrical encircling space of the two semi-cylindrical chuck plates 201. The chuck plate reset spring 301, which is connected to the chuck plate reset piston rod 401, is elastically reset after being impacted, pushing the chuck plate reset piston 402 and pushing the two cylindrical encircling semi-cylindrical chuck plates 201 to reset. The chuck plates 203 then engage with the fish-shaped retrieval tool that has entered the cylindrical encircling space of the two semi-cylindrical chuck plate bodies 201, and the retrieval tool is lifted to complete the retrieval operation.

[0063] The method of using the combined well-feeding instrument with steel wire cable described in this invention includes the following steps:

[0064] 1. When using in the field, tighten the connection between the compression connection section and the 504 thread of the vibration tool connection.

[0065] 2. Separate the clamping connecting section 501 from the retrieval tube body 101. Take out the jaw plate return spring 301, jaw plate return piston 402, and two semi-cylindrical jaw plate bodies 201 in sequence. Insert the two semi-cylindrical jaw plate bodies 201, jaw plate return piston 402, and jaw plate return spring 301 into the jaw plate return piston working channel 108. Connect the jaw plate return spring 301 and the jaw plate return piston rod 401 with a ring. Place the upper end of the jaw plate return piston rod 401 into the jaw plate return piston rod working channel 503. Tighten the threads 502 connecting the clamping connecting section to the retrieval tube body and 106 connecting the retrieval tube body to the clamping connecting section. Note: After connection, the steel wire cable of the retrieval tube body and the jaw plate steel wire cable should be aligned and overlapped through the groove 102.

[0066] 3. After retrieving the bundle of steel wire cables, separate the steel wire cables from the steel wire cable retrieval hook groove 107 at the wellhead to complete the retrieval work.

[0067] 4. To retrieve the well-drilled instrument carrying a small amount of broken steel wire cable, separate the clamping connection section 501 from the retrieval tube body 101 at the wellhead. Then, take out the jaw plate return spring 301, jaw plate return piston 402, and two semi-cylindrical jaw plate bodies 201 in sequence. Separate the top of the well-drilled instrument from the retrieval tube body 101 to complete the retrieval work.

[0068] 5. Sequentially install the two semi-cylindrical clamping plate bodies 201, the clamping plate reset piston 402, and the clamping plate reset spring 301 into the clamping plate reset piston working channel 108. The clamping plate reset spring 301 and the clamping plate reset piston rod 401 are connected by a ring. Place the upper end of the clamping plate reset piston rod 401 into the clamping plate reset piston rod working channel 503. Tighten the threads 502 connecting the clamping connecting short section to the retrieval cylinder body and 106 connecting the retrieval cylinder body to the clamping connecting short section to complete the reset installation.

[0069] 6. Observe the operation of the retrieval tool in the well. When lowering it, observe the slack of the logging wire and when pulling it up, observe the pull force reading on the pull gauge to determine the status of the downhole retrieval operation.

[0070] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A combined well-feeding instrument with steel wire cable, characterized in that, It includes a retrieval cylinder body (101) and a clamping connecting section (501). The lower end of the retrieval cylinder body (101) is connected to the clamping connecting section (501), and the upper end of the clamping connecting section (501) is connected to the oscillating tool.

2. The combined well-feeding instrument with steel wire cable as described in claim 1, characterized in that, The upper end of the salvage cylinder body (101) is provided with a connecting thread (106) between the salvage cylinder body and the clamping connecting short section.

3. The combined well-feeding instrument with steel wire cable as described in claim 2, characterized in that, The lower end of the compression connecting section (501) is provided with a connecting thread (502) between the compression connecting section and the main body of the retrieval cylinder, and the upper end of the compression connecting section (501) is provided with a connecting thread (504) between the compression connecting section and the oscillating tool.

4. The combined well-feeding instrument with steel wire cable as described in claim 3, characterized in that, The main body of the salvage cylinder is connected to the threaded connection (106) of the clamping connection short section and the threaded connection (502) of the clamping connection short section to the main body of the salvage cylinder.

5. The combined well-feeding instrument with steel wire cable as described in claim 3, characterized in that, The compression connection section is connected to the oscillating tool via a threaded connection (504) and the oscillating tool thread.

6. The combined well-feeding instrument with steel wire cable as described in claim 1, characterized in that, The clamping connection short section (501) is provided with a toothed plate reset piston rod working channel (503) at its center, and the retrieval cylinder body (101) is provided with a toothed plate reset piston working channel (108) at its center. The toothed plate reset piston rod working channel (503) and the toothed plate reset piston working channel (108) are connected.

7. The combined well-feeding instrument with steel wire cable as described in claim 6, characterized in that, The main body (101) of the retrieval cylinder includes a toothed plate reset piston rod (401) and a toothed plate reset piston (402). The toothed plate reset piston rod (401) is movably disposed in the toothed plate reset piston rod working channel (503). The toothed plate reset piston (402) is disposed at the lower end of the toothed plate reset piston rod (401). The toothed plate reset piston rod (401) and the toothed plate reset piston (402) are movably disposed in the toothed plate reset piston working channel (108).

8. The combined well-feeding instrument with steel wire cable as described in claim 7, characterized in that, The toothed plate reset piston rod (401) is sleeved with a toothed plate reset spring (301). The upper end of the toothed plate reset spring (301) is connected to the lower end face of the pressing connection short section (501), and the lower end of the toothed plate reset spring (301) is connected to the upper end face of the toothed plate reset piston (402).

9. The combined well-feeding instrument with steel wire cable as described in claim 8, characterized in that, The lower end face of the tooth clip reset piston (402) is connected to the semi-cylindrical tooth clip body (201).

10. The combined well-feeding instrument with steel wire cable as described in claim 9, characterized in that, The lower part of the semi-cylindrical toothed plate body (201) is provided with toothed plate steel wire cable passage grooves (202) symmetrically arranged on the side wall, and the toothed plate steel wire cable passage grooves (202) are connected to the first central through hole (204).

11. The combined well-feeding instrument with steel wire cable as described in claim 10, characterized in that, The inner wall of the semi-cylindrical clip body (201) is provided with clips (203).

12. The combined well-feeding instrument with steel wire cable as described in claim 11, characterized in that, The lower part of the main body (101) of the retrieval tube is provided with a second central through hole (109), and the side wall is symmetrically provided with a steel wire cable passage groove (102) for the main body of the retrieval tube. The steel wire cable passage groove (102) for the main body of the retrieval tube is connected to the second central through hole (109).

13. The combined well-feeding instrument with steel wire cable as described in claim 12, characterized in that, The main body steel wire cable of the salvage cylinder is connected through the groove (102) and the steel wire cable of the clamp plate is connected through the groove (202).

14. The combined well-feeding instrument with steel wire cable as described in claim 13, characterized in that, The semi-cylindrical tooth clip body (201) is disposed in the second central through hole (109).

15. The combined well-feeding instrument with steel wire cable as described in claim 14, characterized in that, The main body steel wire cable of the salvage cylinder is connected through the groove (102) and the steel wire cable of the clamp plate is connected through the groove (202).

16. The combined well-feeding instrument with steel wire cable as described in claim 15, characterized in that, The first central through hole (204) and the second central through hole (109) are connected and overlap.

17. The combined well-feeding instrument with steel wire cable as described in claim 16, characterized in that, A center positioning groove (103) is provided at the bottom where the first center through hole (204) and the second center through hole (109) are connected.

18. The combined well-feeding instrument with steel wire cable as described in claim 11, characterized in that, A hemispherical guide groove (104) is provided at the bottom of the main body (101) of the salvage cylinder.

19. The combined well-feeding instrument with steel wire cable as described in claim 11, characterized in that, The bottom of the retrieval cylinder body (101) is provided with a steel wire cable retrieval hook (105).

20. The combined well-feeding instrument with steel wire cable as described in claim 19, characterized in that, The steel wire cable retrieval hook (105) and the hemispherical guide groove (104) form a steel wire cable retrieval hook groove (107).

Images