Bypass salvaging device of logging instrument

Abstract

The utility model relates to the field of logging, in particular to a logging instrument bypass fishing device which comprises a drill rod connector. The upper end of the drill rod connector is fixedly connected with a body. A cable and a top sheave are separated from a large hook of a drilling machine to be hung on a derrick, the device is installed on a drilling rod, the cable sequentially penetrates through the limiting barrel, the locking connector, the main body and the drilling rod connector to be placed in a cable groove of the main body, and then the anti-rotation jackscrew on the limiting barrel is rotated to be aligned with the cable in the main body. The anti-rotation jackscrew is manually rotated to be screwed down, so that the anti-rotation jackscrew extrudes and limits the cable, the distance between the drilling tool and the clamped position is 20-30 meters, the drilling tool is slowly lowered to the position 2-5 meters away from the clamped position (a surface sleeve), and the cable is lifted to exceed the surface sleeve in the prior art. The problems that in the prior art, a fishing device is difficult to disassemble and assemble quickly, the transportation portability is insufficient, and an instrument is difficult to prevent from being clamped are solved.

Description

Technical Field

[0001] The utility model belongs to the field of well logging, and in particular relates to a bypass fishing device for a well logging instrument. Background Art

[0002] Well logging is a crucial technical means in the exploration and development of oil and gas fields. However, during logging operations, various factors such as drill pipe bending, high-viscosity or low-density drilling fluid, vibration, and well wall instability may cause the logging instrument to become accidentally stuck, which will seriously affect the progress and efficiency of logging work.

[0003] Logging instruments and cables are one of the important equipment for well logging. In oilfield logging, because the drilling team does not drill a bell mouth when lowering the surface casing and the wellbore has an inclination, the logging instrument will get stuck near the bell mouth (because the cable and logging instrument are close to the edge and not in the center), making it impossible to pull the logging instrument out of the wellhead. The fishing device in the existing technology is difficult to quickly disassemble and assemble, lacks portability for transportation, and is difficult to prevent the instrument from getting stuck, so further improvement is needed.

[0004] Therefore, a bypass fishing device for logging instruments is proposed, which can be quickly disassembled and assembled, has good transportation portability, and can prevent the instrument from getting stuck. Utility Model Content

[0005] In order to overcome the problems in the prior art that the salvage device is difficult to quickly disassemble and assemble, is not portable enough for transportation, and is difficult to prevent the instrument from getting stuck, a logging instrument bypass salvage device is proposed.

[0006] The technical solution of the utility model is: a bypass salvage device for a logging instrument, comprising a drill pipe joint; the upper end of the drill pipe joint is fixedly connected to a main body, the inner wall of the upper end of the main body is threadedly installed with a locking joint, the upper end of the locking joint is fixedly connected to a limiting cylinder, the upper end of the limiting cylinder is provided with a limiting mechanism, the upper end of the drill pipe joint is penetrated by a first through hole, the lower end of the drill pipe joint is an opening, the central cross-section of the drill pipe joint is an isosceles trapezoid, the upper end of the locking joint is penetrated by a second through hole, the side wall of the limiting cylinder is penetrated by a third internal threaded cylinder, the inner wall of the third internal threaded cylinder is threadedly installed with an anti-rotation screw, the upper center of the limiting cylinder is penetrated by a wire feed cylinder, and the upper end of the main body is provided with two cable grooves, and the cable grooves are J-shaped.

[0007] Preferably, when in use, the cable and the top pulley are detached from the drilling rig hook and hung on the derrick, the device is installed on the drill pipe, the cable is passed through the limit cylinder, the locking joint, the main body and the drill pipe joint in sequence and placed into the cable groove of the main body, then the anti-rotation top screw on the limit cylinder is rotated, aligned with the cable in the main body, the anti-rotation top screw is manually rotated and tightened, so that the anti-rotation top screw squeezes and limits the cable, and the drill tool is lowered twenty to thirty meters away from the stuck position, and the drill tool is slowly lowered to two to five meters away from the stuck position (surface casing). The cable is lifted above the surface casing in the prior art, which solves the problems that the salvage device in the prior art is difficult to quickly disassemble and assemble, is not portable enough for transportation, and is difficult to prevent the instrument from getting stuck.

[0008] Preferably, a second groove body is formed through the side wall of the locking joint, and the upper and lower ends of the second groove body pass through the upper and lower ends of the locking joint.

[0009] Preferably, a first groove body is provided at the lower end of the limiting cylinder, and the interior of the first groove body is communicated with the interior of the wire feed cylinder.

[0010] Preferably, the two cable ducts together form a U-shape.

[0011] Preferably, the outer diameter of the drill pipe joint is larger than the outer diameter of the main body, and the outer diameter of the locking joint is larger than the outer diameter of the main body.

[0012] Preferably, the limiting mechanism includes a bottom ring, a support column, a top ring, a first sleeve, a first internally threaded barrel, a first threaded column, a rope, a second threaded column, a second internally threaded barrel and a second sleeve; the upper end of the limiting barrel is fixedly connected to the bottom ring, the upper end of the bottom ring is fixedly connected to evenly distributed support columns, the upper ends of multiple support columns are commonly fixedly connected to the top ring, the side wall of one of the support columns is sleeved with the first sleeve, the upper end of the first sleeve is fixedly connected to the first internally threaded barrel, the inner wall of the first internally threaded barrel is threaded with the first threaded column, the upper end of the first threaded column is fixedly connected to one end of the rope, the other end of the rope is fixedly connected to one end of the second threaded column, the outer wall of the other end of the second threaded column is threaded with one end of the second internally threaded barrel, and the other end of the second internally threaded barrel is fixedly connected to the second sleeve.

[0013] Preferably, the inner diameter of the second ring is equal to the inner diameter of the wire feed barrel, and the second ring is made of plastic.

[0014] The beneficial effects of the present invention are as follows: the cable and the top pulley are separated from the drilling rig hook and hung on the derrick, the device is installed on the drill pipe, the cable is passed through the limit cylinder, the locking joint, the main body and the drill pipe joint in sequence and put into the cable groove of the main body, then the anti-rotation top screw on the limit cylinder is rotated and aligned with the cable in the main body, the anti-rotation top screw is manually rotated and tightened so that the anti-rotation top screw squeezes and limits the cable, the drill tool is lowered to a distance of 20 to 30 meters from the stuck position, the drill tool is slowly lowered to a distance of 2 to 5 meters from the stuck position (surface casing), and the cable is lifted up to exceed the surface casing in the prior art, which solves the problems that the salvage device in the prior art is difficult to quickly disassemble and assemble, is not portable for transportation, and is difficult to prevent the instrument from getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic diagram of the three-dimensional structure of a bypass fishing device for a well logging instrument according to the present invention;

[0016] Figure 2 Shown is a schematic diagram of a three-dimensional cross-sectional structure of a bypass fishing device for a well logging instrument according to the present invention;

[0017] Figure 3 Shown is a schematic diagram of the cross-sectional structure of a limiting cylinder of a bypass fishing device for a well logging instrument according to the present invention;

[0018] Figure 4 Shown is a three-dimensional structural schematic diagram of a limiting mechanism of a bypass fishing device for a well logging instrument according to the present invention.

[0019] The marks in the accompanying drawings are: 1. drill pipe joint; 2. main body; 3. locking joint; 4. limiting cylinder; 5. limiting mechanism; 501. bottom ring; 502. support column; 503. top ring; 504. first sleeve ring; 505. first internal threaded cylinder; 506. first threaded column; 507. rope; 508. second threaded column; 509. second internal threaded cylinder; 510. second sleeve ring; 6. first through hole; 7. second through hole; 8. third internal threaded cylinder; 9. anti-rotation top screw; 10. wire feed cylinder; 11. first trough body; 12. second trough body; 13. cable trough. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Example 1: Please refer to Figures 1-4, a logging instrument bypass salvage device, including a logging instrument bypass salvage device, including a drill pipe joint 1; the upper end of the drill pipe joint 1 is fixedly connected to a main body 2, the upper end inner wall of the main body 2 is threadedly installed with a locking joint 3, the upper end of the locking joint 3 is fixedly connected to a limiting cylinder 4, the upper end of the limiting cylinder 4 is provided with a limiting mechanism 5, the upper end of the drill pipe joint 1 is penetrated by a first through hole 6, the lower end of the drill pipe joint 1 is open, the central cross-section of the drill pipe joint 1 is an isosceles trapezoid, the upper end of the locking joint 3 is penetrated by a second through hole 7, the side wall of the limiting cylinder 4 is penetrated and fixedly connected with a third internal threaded cylinder 8, the inner wall of the third internal threaded cylinder 8 is threadedly installed with an anti-rotation screw 9, the upper end center of the limiting cylinder 4 is penetrated and fixedly connected with a wire feed cylinder 10, the upper end of the main body 2 is provided with two cable grooves 13, and the cable groove 13 is J-shaped.

[0022] When in use, the cable and the top pulley are separated from the drilling rig hook and hung on the derrick, the device is installed on the drill pipe, the cable is passed through the limit cylinder 4, the locking joint 3, the main body 2 and the drill pipe joint 1 in sequence and placed into the cable groove 13 of the main body 2, and then the anti-rotation top screw 9 on the limit cylinder 4 is rotated to align with the cable in the main body 2, and the anti-rotation top screw 9 is manually rotated and tightened so that the anti-rotation top screw 9 squeezes and limits the cable, and the drill tool is lowered to a distance of 20 to 30 meters from the stuck position, and the drill tool is slowly lowered to a distance of 2 to 5 meters from the surface casing of the stuck position, and the cable is lifted up to exceed the surface casing in the prior art.

[0023] See also Figure 1 In this embodiment, a second groove body 12 is opened through the side wall of the locking joint 3, and the upper and lower ends of the second groove body 12 pass through the upper and lower ends of the locking joint 3. By setting the second groove body 12, it is convenient to observe the inside of the locking joint 3.

[0024] See also Figure 1 and Figure 3 In this embodiment, a first slot 11 is provided at the lower end of the limiting cylinder 4. The interior of the first slot 11 is communicated with the interior of the wire feed cylinder 10 to facilitate the passage of the cable.

[0025] See also Figure 1 and Figure 3 In this embodiment, the two cable grooves 13 together form a U shape. After the cable is placed in the main body 2, it passes through the cable groove 13 and then extends downward, which can facilitate the positioning of the cable, thereby facilitating the stable placement of the cable.

[0026] See also Figure 1-Figure 3 In this embodiment, the outer diameter of the drill pipe joint 1 is larger than the outer diameter of the main body 2, and the outer diameter of the locking joint 3 is larger than the outer diameter of the main body 2, which facilitates the placement of the drill pipe joint 1, the main body 2 and the locking joint 3 into the well.

[0027] Example 2: Please refer to Figure 4, based on Example 1, the present application provides a technical solution: the limiting mechanism 5 includes a bottom ring 501, a support column 502, a top ring 503, a first sleeve ring 504, a first internally threaded cylinder 505, a first threaded column 506, a rope 507, a second threaded column 508, a second internally threaded cylinder 509 and a second sleeve ring 510; the upper end of the limiting cylinder 4 is fixedly connected to the bottom ring 501, the upper end of the bottom ring 501 is fixedly connected to the evenly distributed support columns 502, the upper ends of multiple support columns 502 are commonly fixedly connected to the top ring 503, the side wall of one of the support columns 502 is sleeved with a first sleeve ring 504, the upper end of the first sleeve ring 504 is fixedly connected to the first internally threaded cylinder 505, the second sleeve ring 510 is fixedly connected to the first internally threaded cylinder 505, the second sleeve ring 510 is fixedly connected to the first internally threaded cylinder 505, the second sleeve ring 510 is fixedly connected to the first internally threaded cylinder 505, the second sleeve ring 510 is fixedly connected to the first internally threaded cylinder 505, the second internally threaded cylinder 505 ... A first threaded column 506 is threadedly installed on the inner wall of an internally threaded barrel 505, and the upper end of the first threaded column 506 is fixedly connected to one end of a rope 507, and the other end of the rope 507 is fixedly connected to one end of a second threaded column 508, and the outer wall of the other end of the second threaded column 508 is threadedly installed to one end of a second internally threaded barrel 509, and the other end of the second internally threaded barrel 509 is fixedly connected to a second ring 510. One end of the first threaded column 506 is threadedly installed on the inner wall of the first internally threaded barrel 505, and the other end of the second threaded column 508 is threadedly installed on the inner wall of the second internally threaded barrel 509. The cable can be limited by using the second ring 510 to be sleeved on the side wall of the second ring 510.

[0028] See also Figure 4 In this embodiment, the inner diameter of the second ring 510 is equal to the inner diameter of the wire inlet barrel 10. The second ring 510 is made of plastic. The cable is passed through the second ring 510, the wire inlet barrel 10, the limiting barrel 4 and the locking joint 3 and then sent into the main body 2. The second ring 510 can be used to limit the outer wall of the cable to a certain extent, thereby facilitating the stable placement of the cable.

[0029] Working principle: First, detach the cable and the top pulley from the big hook of the drilling rig and hang them on the derrick, install the device on the drill pipe, and pass the cable through the limit cylinder 4, the locking joint 3, the main body 2 and the drill pipe joint 1 in sequence and put them into the cable groove 13 of the main body 2, which can facilitate the cable to be limited, thereby facilitating the stable placement of the cable. Then, rotate the anti-rotation top screw 9 on the limit cylinder 4, align it with the cable in the main body 2, manually rotate the anti-rotation top screw 9 and tighten it, so that the anti-rotation top screw 9 squeezes and limits the cable, lower the drill tool to a distance of 20 to 30 meters from the stuck position, slowly lower the drill tool to a distance of 2 to 5 meters from the surface casing of the stuck position, and lift the cable above the surface casing in the prior art to prevent the drill tool from getting stuck.

[0030] Before the cable is passed downward, one end of the first threaded column 506 is threadedly installed on the inner wall of the first internally threaded cylinder 505, and the other end of the second threaded column 508 is threadedly installed on the inner wall of the second internally threaded cylinder 509. The second ring 510 is sleeved on the side wall of the second ring 510 to limit the cable, thereby facilitating the stable placement of the cable.

[0031] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A logging instrument bypass fishing device, comprising a drill pipe joint (1); characterized in that: The upper end of the drill rod joint (1) is fixedly connected to a main body (2), a locking joint (3) is threadedly installed on the inner wall of the upper end of the main body (2), the upper end of the locking joint (3) is fixedly connected to a limiting cylinder (4), the upper end of the limiting cylinder (4) is provided with a limiting mechanism (5), the upper end of the drill rod joint (1) is penetrated by a first through hole (6), the lower end of the drill rod joint (1) is open, the central cross-section of the drill rod joint (1) is an isosceles trapezoid, the upper end of the locking joint (3) is penetrated by a second through hole (7), the side wall of the limiting cylinder (4) is penetrated by a third internal threaded cylinder (8), the inner wall of the third internal threaded cylinder (8) is threadedly installed with an anti-rotation top screw (9), the upper center of the limiting cylinder (4) is penetrated by a wire feed cylinder (10), the upper end of the main body (2) is provided with two cable grooves (13), and the cable grooves (13) are J-shaped.

2. The logging instrument bypass fishing device according to claim 1, characterized in that: A second groove body (12) is provided through the side wall of the locking joint (3), and the upper and lower ends of the second groove body (12) pass through the upper and lower ends of the locking joint (3).

3. The bypass fishing device for logging instruments according to claim 1, characterized in that: A first groove body (11) is provided at the lower end of the limiting cylinder (4), and the interior of the first groove body (11) and the interior of the wire feed cylinder (10) are communicated with each other.

4. The logging instrument bypass fishing device according to claim 1, characterized in that: The two cable ducts (13) together form a U shape.

5. The logging instrument bypass fishing device according to claim 1, characterized in that: The outer diameter of the drill pipe joint (1) is larger than the outer diameter of the main body (2), and the outer diameter of the locking joint (3) is larger than the outer diameter of the main body (2).

6. The logging instrument bypass fishing device according to claim 1, characterized in that: The limiting mechanism (5) comprises a bottom ring (501), a support column (502), a top ring (503), a first sleeve ring (504), a first internally threaded cylinder (505), a first threaded column (506), a line (507), a second threaded column (508), a second internally threaded cylinder (509) and a second sleeve ring (510); the upper end of the limiting cylinder (4) is fixedly connected to the bottom ring (501), the upper end of the bottom ring (501) is fixedly connected to uniformly distributed support columns (502), the upper ends of the plurality of support columns (502) are commonly fixedly connected to the top ring (503), and one of the support columns (502) is fixedly connected to the top ring (503). ) is provided with a first ring (504) on the side wall, the upper end of the first ring (504) is fixedly connected to a first internally threaded tube (505), the inner wall of the first internally threaded tube (505) is threadedly mounted with a first threaded column (506), the upper end of the first threaded column (506) is fixedly connected to one end of a wire rope (507), the other end of the wire rope (507) is fixedly connected to one end of a second threaded column (508), the outer wall of the other end of the second threaded column (508) is threadedly mounted with one end of a second internally threaded tube (509), and the other end of the second internally threaded tube (509) is fixedly connected to a second ring (510).

7. The logging instrument bypass fishing device according to claim 1, characterized in that: The inner diameter of the second ring (510) is equal to the inner diameter of the wire feed barrel (10), and the second ring (510) is made of plastic.

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