Tool for sleeving and fishing gun string with short cable

Abstract

The utility model belongs to the technical field of oil and gas well fishing tools, and discloses a tool for sleeving and fishing a gun string with a short cable, which comprises a sleeving and fishing assembly, the sleeving and fishing assembly comprises a fishing main body, the upper end of the fishing main body is connected with an upper joint, and the lower end of the fishing main body is connected with a sleeving and milling head; a fishing slip and a milling control ring are arranged in the fishing body, four arrow-shaped grooves capable of containing logging cables in the same direction are evenly distributed in each of the milling control ring and the fishing slip, and hard alloy is arranged at the bottom end of the milling control ring. According to the utility model, the buffer spring and the logging cable can smoothly pass through the milling control ring with the accommodating function and the salvage slip to complete salvage of the reinforcing cylinder with the short cable; and when the fish head is irregular and cannot enter the fishing barrel, the milling fishing operation can be quickly switched to continuously finish the fallen object fishing. According to the utility model, the unfreezing and salvaging process of the perforating gun string with the short cable is optimized, and the aim of salvaging the perforating gun string with the short cable is fulfilled by descending the perforating gun string into a well once.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas well fishing tools, and in particular relates to a fishing tool with a short cable gun string. Background Art

[0002] During the construction of cluster perforation and bridge shooting in horizontal wells, during the pumping period, due to imperfect technology, excessive pumping displacement, excessive pressure difference between the front and rear of the pipe string caused by abnormalities in the well, or improper cooperation between related parties, the perforating gun string was stuck due to upward movement. During the treatment, the state of the gun string in the well and the shape of the fish head were unclear, which made it difficult to quickly salvage the fallen fish. In the previous handling of similar accidents, on-site operators used many different processes to salvage the fallen objects in the well. For example, lead stamping to feel the fish head, internal spear salvage of the cable beside the fish head, milling the fish head to clean the annulus, and salvage the gun string were used for treatment. However, due to improper process selection and poor tool applicability, the state of the fish head in the well is often damaged twice, making the treatment more difficult. Analysis shows that the current milling salvage process is the most effective method for handling perforating gun strings with short cables, but the introduction of the fish head, the handling of the short cable and buffer spring, the safety of the salvage tool string and the exit method during construction will affect the operation effect of milling salvage if they are not well solved.

[0003] The Chinese patent publication number is CN214944134U, and the name of the patent application is a sleeve milling salvage short section, which includes a cylinder, the upper end of which is provided with a thread for connecting the sleeve milling tube, the lower end of which is provided with a thread for connecting the sleeve milling drill bit, and the inner wall of the cylinder is provided with a salvage buckle, and the buckle surface of the salvage buckle is a conical surface. Although this patent application can also realize sleeve milling salvage, its operation cycle is long, and improper process selection will cause secondary damage to the fish head, bringing new risks to the salvage of fallen objects. Utility Model Content

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a tool for salvaging a short cable gun string, which can enable the buffer spring and the logging cable to smoothly pass through the accommodating milling control ring and the salvage slip to complete the salvage of the reinforced tube with the short cable gun string; when the fish head is irregular and cannot enter the salvage tube, the buffer spring and the cable that affect the entry of the fish can also be disposed of by the milling head and the milling control ring with granular alloy, and the salvage of the fallen objects can be continued, thereby achieving the purpose of salvaging the fallen objects in one trip down the well.

[0005] A combination tool for milling and salvaging with wide applications and high success rate of one-time salvage is urgently needed to solve the problem of short cable perforating gun string in one-time salvage.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A fishing tool with a short cable gun string comprises: a fishing assembly, wherein the fishing assembly comprises a fishing body, wherein the upper end of the fishing body is connected with an upper joint, and the lower end is connected with a casing milling head, and the fishing body is a hollow shell; the inner wall of the fishing body is connected with a milling control ring and a fishing slip; the milling control ring and the fishing slip are both provided with an arrow-shaped introduction groove capable of accommodating a logging cable; the bottom end of the milling control ring has a hard alloy.

[0008] Optionally, the salvage slip is nested above the milling control ring.

[0009] Optionally, a screw motor is connected to the top of the fishing assembly, the other end of the screw motor is connected to a hydraulic release hand, and the other end of the hydraulic release hand is connected to an oil connection.

[0010] Optionally, the other end of the upper joint is connected to the screw motor.

[0011] Optionally, the milling control ring is fixed in the salvage body through the sleeve milling head.

[0012] Optionally, one end of the sleeve milling head is a milling tooth, and the other end is a double-stage male buckle connected to the salvage body.

[0013] Optionally, the inner wall of the middle portion of the salvage body has threads.

[0014] Optionally, the thread of the salvage body is a reverse sawtooth left-hand thread.

[0015] Optionally, a longitudinal keyway is engraved on the inner wall of the lower portion of the salvage body, and the upper end of the milling control ring has a convex key that matches the longitudinal keyway of the salvage body.

[0016] Optionally, the inner wall of the milling control ring is circumferentially evenly provided with a plurality of first arrow-shaped introduction grooves and a first cable receiving groove connected to the first arrow-shaped introduction groove, and the first arrow-shaped introduction groove decreases in diameter toward the first cable receiving groove; the inner wall of the salvage cava is provided with a plurality of second arrow-shaped introduction grooves and a second cable receiving groove corresponding to the positions of the first arrow-shaped introduction grooves, and the second arrow-shaped introduction groove and the second cable receiving groove are connected to each other; the diameter of the second cable receiving groove is smaller than that of the second arrow-shaped introduction groove.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model can make the buffer spring and logging cable pass smoothly through the milling control ring with accommodation and the salvage slip to complete the salvage of the reinforcing tube; when the fish head is irregular and cannot enter the salvage tube, it can also quickly switch to the milling salvage operation, and the buffer spring and cable that affect the entry of the fish are handled by the milling head and the milling control ring with granular alloy, and the salvage of the fallen object is continued. The utility model optimizes the unblocking and salvage process of the perforating gun string with a short cable, and achieves the purpose of salvaging the fallen object in one trip down the well.

[0019] Furthermore, the utility model uses oil as a conveying tool during operation, and the screw motor provides rotation torque. For cluster perforation-bridge perforation in oil and gas wells, the perforating gun string with short cables that is stuck can be quickly salvaged. If it cannot be unstuck after being salvaged, the screw motor can also be used to drive the salvage tool string to rotate to release the salvage tool in a rotating manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure salvage of the utility model;

[0022] Figure 2 This is a schematic diagram of a scooping assembly in Example 1 of the utility model;

[0023] Figure 3 This is a schematic diagram of the salvage body of Example 1 of the utility model;

[0024] Figure 4 This is a schematic diagram of a milling control ring in Embodiment 1 of the utility model;

[0025] Figure 5 This is a schematic diagram of salvaging slips in Example 1 of the utility model;

[0026] Figure 6 This is a schematic diagram of a milling head set in Example 1 of the utility model;

[0027] Figure 7 This is a schematic diagram of the upper joint of Example 1 of the utility model;

[0028] Among them, 1. oil connection; 2. hydraulic release; 3. screw motor; 4. salvage assembly; 5. buffer spring; 6. reinforcement tube; 7. logging cable; 41. salvage body; 42. milling control ring; 43. salvage slip; 44. sleeve milling head; 45. upper joint; 421. convex key; 422. cemented carbide; 423. first arrow-shaped introduction groove; 424. first cable receiving groove; 431. second arrow-shaped introduction groove; 432. second cable receiving groove; 441. milling teeth. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] The utility model is described in detail below in conjunction with the accompanying drawings.

[0033] like Figure 1 As shown, a fishing tool with a short cable gun string of the utility model comprises: a fishing assembly 4, the fishing assembly 4 comprises a fishing body 41, the upper end of the fishing body 41 is connected to an upper joint 45, and the lower end is connected to a set milling head 44, the fishing body 41 is a hollow tubular shell, the fishing body 41 is equipped with a fishing slip 43 and a milling control ring 42, the logging cable 7 passes through the buffer spring 5 and is sheathed together with the reinforcing tube 6 to form a fish head, during construction, the reinforcing tube 6 enters the fishing assembly 4 with the logging cable 7 to realize the fishing of fallen objects. The bottom end of the milling control ring 42 has a hard alloy 422.

[0034] The milling control ring 42 is fixed in the salvaging body 41 through the sleeve milling head 44 .

[0035] The top of the fishing assembly 4 is connected to a screw motor 3, the other end of the screw motor 3 is connected to a hydraulic release 2, and the other end of the hydraulic release 2 is connected to an oil connection 1. The fishing object of the fishing body 41 is a fish head, and the fish head includes a reinforcing tube 6, and a buffer spring 5 is arranged on the top of the reinforcing tube 6. The logging cable 7 passes through the buffer spring 5 and is connected to the reinforcing tube 6 to form an irregular fish head.

[0036] When the fish head is irregular and cannot enter the overshot tube, the buffer spring 5 and the logging cable 7 that affect the fish can be removed by the sleeve milling head 44 and the milling control ring 42 with hard alloy 422, and the salvage of the fallen object can be continued; if it cannot be unstuck after catching, the salvage tool string can be driven by the screw motor 3 to rotate to realize the release of the salvage tool in a rotating manner, which can effectively solve the salvage of the perforating gun string with short cable that is stuck, achieve the purpose of rapid processing, and is conducive to the further implementation of the cluster perforating process. Among them, the salvage tool string includes an oil connection 1, a hydraulic release 2, a screw motor 3 and a sleeve salvage assembly 4.

[0037] Example 1

[0038] It includes an oil connection 1, a hydraulic release 2, a screw motor 3, a fishing assembly 4, a buffer spring 5, a reinforcing tube 6 and a logging cable 7.

[0039] One end of the hydraulic release 2 is connected to the oil connection 1, and the other end is connected to the screw motor 3, and the other end of the screw motor 3 is connected to the salvage assembly 4. The reinforcement tube 6 enters the salvage assembly 4 to realize the salvage of the fallen objects. Specifically, the oil connection 1 is a continuous oil pipe.

[0040] The oil connection 1 is a long oil pipe without threaded connection that can be continuously lowered or pulled out, and is used to transport the fishing assembly 4. When the fishing tool string cannot be unstuck and rotated out after fishing, the hydraulic release 2 can be used to release the fishing tool string so that the problem will not be further complicated. The screw motor 3 can convert the kinetic energy of the liquid into the rotational kinetic energy of the output shaft, driving the fishing assembly 4 to rotate.

[0041] The fishing assembly 4 has a cavity inside, and a fishing slip 43 and a milling control ring 42 are installed in the tube. The logging cable 7 passes through the buffer spring 5 and is sheathed together with the reinforcing tube 6. During construction, the reinforcing tube 6 enters the fishing assembly 4 to realize the salvage of fallen objects. The logging cable 7 passes through the buffer spring 5 and is sheathed together with the reinforcing tube 6 to form a fish head. The irregular fish head generated when the gun string moves upward becomes the main factor affecting the reinforcing tube 6 entering the fishing assembly 4.

[0042] Specifically, the reinforcing tube 6 is a regular fish head.

[0043] like Figures 2 to 7 As shown, the salvaging assembly 4 includes a salvaging body 41 , a milling control ring 42 , a salvaging slip 43 , a sleeve milling head 44 and an upper joint 45 .

[0044] One end of the upper joint 45 is connected to the screw motor 3, and the other end is connected to the top of the salvaging body 41. A first arrow-shaped introduction groove 423 is provided in the milling control ring 42 to provide an accommodation space.

[0045] like Figure 3 As shown, the salvaging body 41 is a hollow tubular shell.

[0046] A milling control ring 42 and a salvage slip 43 are installed in the salvage body 41. The salvage slip 43 has a groove matching the convex key 421. The salvage slip 43 and the milling control ring 42 are sheathed together with the convex key 421 of the milling control ring 42 and the groove of the salvage body 41 to limit the rotation of the salvage slip 43 in the cylinder.

[0047] The inner wall of the middle part of the salvage body 41 is provided with an inverted sawtooth left-hand thread, and the clearance between the sawtooth left-hand thread and the outer thread of the salvage slip 43 determines the locking and releasing state of the salvage slip 43 in the salvage body 41 .

[0048] A longitudinal keyway is engraved on the lower part of the salvage body 41 to limit the rotation of the assembled milling control ring 42 and the salvage slips 43 in the salvage body 41 .

[0049] The milling control ring 42 is used to introduce, accommodate and trim the irregular fish head including the logging cable 7 and the reinforcing tube 6.

[0050] like Figure 4 As shown, the milling control ring 42 is annular, and has a convex key 421 on the upper end that matches the longitudinal keyway of the salvage body 41, and is used to achieve positioning together with the salvage slip 43 and the longitudinal keyway in the salvage body 41. Specifically, the convex key 421 is set on the end of the milling control ring 42.

[0051] The inner wall of the milling control ring 42 is circumferentially evenly provided with a plurality of first arrow-shaped introduction grooves 423 for guiding the logging cable 7 through the milling control ring 42 and into the salvage slip 43; the inner wall of the milling control ring 42 is circumferentially evenly provided with first cable accommodating grooves 424 connected to the first arrow-shaped introduction grooves 423 for accommodating the logging cable 7; the first arrow-shaped introduction grooves 423 are reduced in diameter toward the first cable accommodating groove 424.

[0052] Specifically, the number of the first arrow-shaped introduction grooves 423 and the number of the first cable accommodating grooves 424 are both four.

[0053] Specifically, the first cable accommodating groove 424 has a groove width of 12 mm. The lower end of the milling control ring 42 is welded with granular carbide 422 , specifically, the granular carbide 422 is tungsten carbide, which is used to handle the deformed buffer spring 5 and the sagging logging cable 7 that cannot enter the milling control ring 42 .

[0054] like Figure 5 As shown, the inner wall of the salvage cava 43 is provided with a plurality of second arrow-shaped introduction grooves 431 and second cable accommodating grooves 432 corresponding to the positions of the first arrow-shaped introduction grooves 423, and the second arrow-shaped introduction grooves 431 and the second cable accommodating grooves 432 are interconnected; the diameter of the second cable accommodating groove 432 is smaller than that of the second arrow-shaped introduction grooves 431.

[0055] The salvage slips 43 have through holes, and the salvage slips 43 adopt a basket-type slip structure.

[0056] Specifically, the number of the second arrow-shaped introduction groove 431 and the second cable receiving groove 432 are both four; the second arrow-shaped introduction groove 431 and the second cable receiving groove 432 of the salvage cava 43 are both connected with each first cable receiving groove 424 of the milling control ring 42.

[0057] The salvage slip 43 has a left-handed conical thread on the outside, and the gap between the inner conical thread of the salvage body 41 and the left-handed outer conical thread of the salvage slip 43 is 4mm, which can improve the movement ability of the salvage slip 43 on the basis of ensuring safety. The inner diameter of the salvage slip 43 is 1-1.5mm smaller than the outer diameter of the salvaged object, which is convenient for the release of the slip; the reliability and safety of the salvage tool can be well achieved through the salvage slip 43.

[0058] like Figure 6 As shown, one end of the sleeve milling head 44 is wavy, and the other end is a double-stage male buckle, which is used to connect with the salvage body 41. When the sleeve milling operation is performed, the tool string can bear a large torque. The milling teeth 441 of the sleeve milling head 44 are wavy with four teeth, and the bottom is welded with granular cemented carbide 422, which is used to sleeve the downhole cable and move the reinforcement tube 6 or the downhole sand, and introduce the reinforcement tube 6 into the milling control ring 42 and the salvage slip 43; the upper joint 45, the upper end outputs the male buckle, which is connected to the screw motor 3; the lower end is a triangular buckle, which is connected to the salvage body 41. Specifically, the cemented carbide 422 has tungsten carbide.

[0059] Example 2

[0060] When the utility model is used, a salvage tool with a short cable gun string is firstly implemented, and then the milling salvage operation is switched to after the salvage fails. During construction, the oil connection 1 is used to transport the salvage assembly 4 in the casing to the fish head composed of the buffer spring 5, the logging cable 7, and the reinforcing tube 6. During salvage, under the action of drilling pressure, the reinforcing tube 6, the top buffer spring 5, and the logging cable 7 on the side enter the milling head 44, and the salvage tool continues to move downward. Under the guidance of the first arrow-shaped introduction groove 423 of the milling control ring 42, the logging cable 7 will enter any open groove of the milling control ring 42. As the salvage tool is lowered, the second arrow-shaped introduction groove 431 of the salvage slip 43 at the same angle as the receiving groove of the milling control ring 42 guides the logging cable 7 into the receiving groove of the salvage slip 43, so that the logging cable 7 is no longer the main factor affecting the capture of fallen objects. At this time, the buffer spring 5 and the reinforcing tube 6 also smoothly enter the salvage slip 43 under the action of external force. The depth method and drilling pressure method are used to determine that the reinforcing tube 6 enters the salvage slip 43 through the sleeve milling head 44 and the milling control ring 42, and then the lowering of the oil connection 1 is stopped. Lift the oil connection 1, the load of the salvage tool increases, and then try to unblock it within the safe tension range. If it is determined that the fish head cannot be introduced into the salvage tube, first clean the fish head, start the screw motor 3 at the top of the fish head, slowly lower the salvage tool, rely on the sleeve milling head 44 and the milling control ring 42 to loosen and crush foreign objects such as sand on the top of the fish head, and then introduce the fish head into the salvage tool. Appropriately increase the drilling pressure during salvage. If it is ineffective, switch to the sleeve salvage operation. Under the action of drilling pressure and torque, the irregular fish top is trimmed until the buffer spring 5 and the logging cable 7 no longer affect the salvage of fallen objects. After the reinforcing tube 6 enters the salvage slip 43, the pump is stopped and the salvage tool string is lifted up. If the perforating gun string is stuck within the tensile load range, it is unstuck and pulled out; if it cannot be unstuck, the pump is turned on to start the screw 3, and the oil connection 1 is slowly lifted up. Driven by the screw motor, the salvage tool is rotated to release it; if the salvage tool cannot be withdrawn, the hydraulic release 2 is released to pull out the oil connection 1.

[0061] Unless otherwise specified, the device elements involved in the above embodiments are all conventional device elements, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A fishing tool with a short cable gun string, characterized in that: include: A salvage assembly (4), the salvage assembly (4) comprising a salvage body (41), the upper end of the salvage body (41) being connected to an upper joint (45), the lower end being connected to a sleeve milling head (44), the salvage body (41) being a hollow shell; the inner wall of the salvage body (41) being connected to a milling control ring (42) and a salvage slip (43); the milling control ring (42) and the salvage slip (43) being provided with arrow-shaped introduction grooves capable of accommodating a logging cable (7); the bottom end of the milling control ring (42) being provided with a hard alloy (422).

2. A fishing tool with a short cable gun string according to claim 1, characterized in that: The salvaging slip (43) is nested above the milling control ring (42).

3. A fishing tool with a short cable gun string according to claim 1, characterized in that: The top of the fishing assembly (4) is connected to a screw motor (3), the other end of the screw motor (3) is connected to a hydraulic release hand (2), and the other end of the hydraulic release hand (2) is connected to an oil connection (1).

4. A fishing tool with a short cable gun string according to claim 3, characterized in that: The other end of the upper joint (45) is connected to the screw motor (3).

5. A fishing tool with a short cable gun string according to claim 1, characterized in that: The milling control ring (42) is fixed in the salvaging body (41) through the sleeve milling head (44).

6. A fishing tool with a short cable gun string according to claim 1, characterized in that: One end of the sleeve milling head (44) is a milling tooth (441), and the other end is a double-stage male buckle connected to the salvaging body (41).

7. A fishing tool with a short cable gun string according to claim 1, characterized in that: The inner wall of the middle part of the salvaging body (41) has threads.

8. A fishing tool with a short cable gun string according to claim 7, characterized in that: The thread of the salvage body (41) is a reverse sawtooth type left-hand thread.

9. A fishing tool with a short cable gun string according to claim 1, characterized in that: A longitudinal keyway is engraved on the inner wall of the lower part of the salvaging body (41), and a convex key (421) matching the longitudinal keyway of the salvaging body (41) is provided on the upper end of the milling control ring (42).

10. A fishing tool with a short cable gun string according to claim 9, characterized in that: The inner wall of the milling control ring (42) is uniformly provided with a plurality of first arrow-shaped introduction grooves (423) and a first cable receiving groove (424) connected to the first arrow-shaped introduction grooves (423), and the first arrow-shaped introduction grooves (423) are reduced in diameter toward the first cable receiving grooves (424); the inner wall of the salvage slip (43) is provided with a plurality of second arrow-shaped introduction grooves (431) and a second cable receiving groove (432) corresponding to the positions of the first arrow-shaped introduction grooves (423), and the second arrow-shaped introduction grooves (431) and the second cable receiving grooves (432) are connected to each other; The diameter of the second cable accommodating groove (432) is smaller than that of the second arrow-shaped introduction groove (431).

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