Combined tool for fishing broken rod of eccentric blanking plug of injection well

Abstract

The utility model relates to the technical field of oil and gas production, in particular to a broken rod fishing combination tool for an eccentric blanking plug of an injection well, which comprises a box body and a box cover, the box body is of a hollow rectangular structure and is rotatably connected with the box cover through a rotating shaft, and a centralizing fishing head, a cam unlocking fishing head and a gland outer cylinder fishing head are respectively arranged in the box body. According to the combined tool for fishing the broken rod of the eccentric blanking plug of the injection well, the cam unlocking fishing head can unlock a blanking plug cam and clamp a broken polished rod of the blanking plug, and the centralizing fishing head can clamp the deviated broken polished rod of the blanking plug. According to the combined tool for fishing the broken rod of the eccentric blanking plug of the injection well, the multiple fishing heads are arranged, multiple fishing modes are provided, the most suitable tool can be selected according to different fishing conditions, the fishing success rate is increased, and the working efficiency is improved. And the flexibility and the applicability of the fishing work are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas production, in particular to a broken rod salvage combination tool for an eccentric plugger of an injection well. Background Art

[0002] In recent years, with the continuous subdivision of injection well layers in oil fields, the distance between layers has been shortened to 2-5 meters, which has brought great problems to the injection volume allocation work. In the process of allocation by throwing and fishing plugs, since the layers are too close, operators are very likely to make mistakes and throw the plugs into the wrong layer. The consequences of such misoperation are very serious. When there is already a plug in the adjacent layer, and the operator mistakenly believes that there is no plug installed in the layer, throwing the plug into the layer again will cause the plug filter cover on the fishing head of the fishing plug to collide violently with the fishing rod at the upper end of the existing plug. During the repeated throwing process, this collision will cause the fish scale head of the fishing rod to be broken, thereby causing damage to the equipment and interruption of the injection operation.

[0003] Currently, there are no special salvage tools that can effectively handle this situation. Once the plugger scales break, it can only be handled by reporting the operation, which not only increases the operating cost, but also delays the production progress and has an adverse impact on the overall operational efficiency of the oil field. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] The utility model provides a combined tool for salvaging a broken rod of an eccentric plug for an injection well, so as to overcome the problem in the prior art that the remaining light rod portion cannot be salvaged after the plug salvage rod is broken off.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model provides an injection well eccentric plugger broken rod salvage combination tool, comprising: a box body and a box cover;

[0008] The box body is a hollow rectangular structure, and the box body and the box cover are rotatably connected through several rotating shafts;

[0009] The box body is respectively provided with a supporting salvage head, a cam unlocking salvage head and a pressure cap outer cylinder salvage head;

[0010] The said salvage head is a hollow cylindrical structure, and a joint is provided on the upper end of the said salvage head. The joint is a cylindrical structure, and the joint is made integral with the salvage head. The outer wall of the joint is provided with through holes running through both sides.

[0011] The cam unlocking salvage head is a hollow cylindrical structure. A cam unlocking salvage head joint is provided on the upper end of the cam unlocking salvage head. The joint is a cylindrical structure. The joint is integrated with the cam unlocking salvage head. The outer wall of the joint is provided with through holes running through both sides.

[0012] The gland outer tube salvage head is a hollow cylindrical structure. A gland outer tube salvage head joint is provided on the upper end of the gland outer tube salvage head. The gland outer tube salvage head joint is a cylindrical structure. The gland outer tube salvage head joint is integrated with the gland outer tube salvage head. The outer wall of the gland outer tube salvage head joint is provided with through holes running through both sides.

[0013] Preferably, a buffer partition is provided in the box body, and three grooves are provided on the buffer partition, and the supporting main salvage head, the cam unlocking salvage head and the pressure cover outer cylinder salvage head are respectively embedded in the grooves.

[0014] Preferably, the inner wall of the upper end of the supporting salvage head is provided with a step, and the radius of the inner wall of the lower end of the supporting salvage head is greater than the radius of the inner wall of the upper end.

[0015] Preferably, shock-absorbing material is filled between the buffer partition and the box body.

[0016] Preferably, the inner wall of the cam unlocking fishing head is provided with a step, and the radius of the inner wall of the cam unlocking fishing head matches the radius of the inner wall of the upper end of the supporting fishing head.

[0017] Preferably, the inner wall of the gland outer cylinder fishing head is provided with a step, and the radius of the inner wall of the gland outer cylinder fishing head matches the radius of the inner wall of the lower end of the supporting body fishing head.

[0018] Preferably, the outer walls of the lower ends of the supporting main salvage head, the cam unlocking salvage head and the pressure cap outer cylinder salvage head are respectively provided with two rectangular through holes.

[0019] Preferably, the two rectangular through holes provided on the outer wall of the lower ends of the supporting main salvage head, the cam unlocking salvage head and the pressure cap outer cylinder salvage head are perpendicular to each other.

[0020] (3) Beneficial effects

[0021] The utility model provides a combined tool for salvaging a broken rod of an eccentric plugger in an injection well, which can realize multiple salvaging methods by arranging a supporting salvaging head, a cam unlocking salvaging head and a pressure cap outer cylinder salvaging head. The most suitable tool can be selected for different salvaging situations, thereby improving the success rate of salvage and increasing the flexibility and applicability of salvage work. By placing multiple salvage heads in a box body and connecting the box cover to the box body through rotation, the storage and carrying of the tools are convenient, thereby achieving the purpose of improving the efficiency and success rate of salvage operations and reducing salvage time and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a broken rod salvage combination tool for an eccentric plugger of an injection well according to the present invention is shown;

[0023] Figure 2 A schematic structural diagram of a capping outer cylinder fishing head of a broken rod fishing combined tool for an eccentric plugger of an injection well according to the present invention is shown;

[0024] Figure 3 A schematic diagram of the structure of a cam unlocking fishing head of a broken rod fishing combination tool for an eccentric plugger of an injection well according to the present invention is shown;

[0025] Figure 4 The utility model shows a structural schematic diagram of a supporting salvage head of a broken rod salvage combination tool for an eccentric plugger of an injection well.

[0026] Among them: 1: box body; 2: rotating shaft; 3: box cover; 4: supporting the main salvage head; 5: cam unlocking salvage head; 6: pressing the outer tube salvage head. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “inside”, “outside”, “top”, “bottom”, etc. are all based on the directions or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the present invention.

[0029] like Figures 1-4 As shown, the utility model provides a combined tool for salvaging a broken rod of an eccentric plug of an injection well, comprising: a box body 1 and a box cover 3;

[0030] The box body 1 adopts a hollow rectangular structure to ensure sufficient internal space to accommodate a variety of fishing heads while maintaining overall strength and durability. A box cover 3 is provided on one side of the box body 1. The box body 1 and the box cover 3 are rotatably connected by a plurality of rotating shafts 2, so that the box cover 3 can be easily opened and closed, making it convenient to take and put the fishing heads.

[0031] The box body 1 is provided with a buffer partition, which not only serves as a partition so that each tool has an independent space, but also is filled with high-density foam plastic as a shock-absorbing material between the buffer partition and the inner wall of the box body 1 to absorb external impact. The buffer partition is provided with three grooves, the sizes and shapes of which respectively match the supporting salvage head 4, the cam unlocking salvage head 5 and the pressure cover outer cylinder salvage head 6, so that the three salvage tools can be tightly embedded therein, which not only saves space but also ensures that the tools are firmly fixed in the box body, avoiding mutual friction and collision between the tools.

[0032] like Figure 3 As shown, the cam unlocking salvage head 5 is a hollow cylindrical structure, and a cam unlocking salvage head joint is provided at the upper end of the cam unlocking salvage head 5 to facilitate connection and torque transmission. The cam unlocking salvage head joint is made into one piece with the cam unlocking salvage head 5. The cam unlocking salvage head joint is a cylindrical structure, and the outer diameter of the cam unlocking salvage head joint is smaller than the outer diameter of the cam unlocking salvage head 5. A through hole is provided on the outer wall of the cam unlocking salvage head joint, and two mutually perpendicular rectangular through holes are provided on the outer wall of the lower end of the cam unlocking salvage head 5. The two rectangular through holes enable the lower end of the cam unlocking salvage head 5 to open outwards under pressure, and the broken part of the polished rod of the plugger is clamped and fixed by the opened structure, thereby achieving effective salvage.

[0033] The cam unlocking salvaging head 5 is used when the plugger cannot be salvaged after repeated salvage during the process of salvaging the downhole plugger by the salvage device. It is necessary to first perform a lead mold test, lower the lead mold into the target layer by connecting the weighted rod, and then lift the lead mold to observe the traces of the lead print. If the trace of the lead print is the imprint of a broken rod and the lead print is not deflected, the cam unlocking salvaging head 5 is used to cooperate with the salvage device to perform the salvage operation. When lowering, the front end of the cam unlocking salvaging head 5 will open under the action of pressure to clamp and fix the broken part of the plugger's rod. When lifting the salvage device, the cam unlocking salvaging head 5 drives the plugger cam to unlock, and the plugger is pulled out of the deviated hole. The strong magnetic group in the salvage device pocket will adsorb the salvaged plugger on the strong magnetic group to prevent the plugger from falling off.

[0034] like Figure 4The cam 4 is provided with a plurality of holes, each of which is provided with a plurality of holes, each of which is provided with a plurality of holes, each of which is provided with a plurality of holes.

[0035] The supporting salvage head 4 is used when the plug cannot be salvaged after repeated salvage during the process of salvaging the underground plug by the salvage device. It is necessary to first perform a lead mold test, lower the lead mold into the target layer by connecting the weighted rod, and then lift the lead mold to observe the traces of the lead print. If the trace of the lead print is the imprint of a broken rod and the lead print is observed to be deflected, the supporting salvage head 4 is used to cooperate with the salvage device to perform the salvage operation. When lowering, the part with a larger inner diameter at the lower end of the supporting salvage head 4 first contacts the plug, and the lower end part with a larger inner diameter is covered with the pressure cover of the plug for straightening, and then the broken part of the plug's polished rod is clamped and fixed by the upper end with a smaller inner diameter. When lifting the salvage device, the supporting salvage head 4 drives the plug cam to unlock, and pulls the plug out of the deviated hole. The strong magnetic group in the salvage device pocket will adsorb the salvaged plug on the strong magnetic group to prevent the plug from falling off during the lifting process.

[0036] like Figure 2 As shown, the gland outer tube salvage head 6 is a hollow cylindrical structure, and a gland outer tube salvage head joint is provided at the upper end of the gland outer tube salvage head 6. The joint on the gland outer tube salvage head is a cylindrical structure, and the joint on the gland outer tube salvage head is integrated with the gland outer tube salvage head 6. The outer wall of the joint on the gland outer tube salvage head is provided with through holes running through both sides, and the inner wall of the gland outer tube salvage head 6 is provided with steps. The radius size of the inner wall of the gland outer tube salvage head 6 matches the radius size of the inner wall of the lower end of the supporting formal salvage head 4. The outer wall of the lower end of the gland outer tube salvage head 6 is provided with two mutually perpendicular rectangular through holes. The two rectangular through holes enable the lower end of the gland outer tube salvage head 6 to open outward under pressure, thereby clamping and fixing the plug gland outer tube;

[0037] The gland outer tube salvage head 6 is used to salvage the plug when the cam unlocking salvage head 5 cannot be successfully salvaged. When in use, it is necessary to first perform a lead mold test, lower the lead mold into the target layer by connecting the weighted rod, and then lift the lead mold to observe the traces of the lead print. If the trace of the lead print is the mark of a broken rod and the lead print is not deflected, first use the cam unlocking salvage head 5 to cooperate with the salvage device to perform the salvage operation. If the cam unlocking salvage head 5 cannot salvage the plug, it is determined that the plug cam has been successfully unlocked. However, because the upper end of the broken polished rod is too short and the clamping fails, it is necessary to use the gland outer tube salvage head 6 for secondary salvage. The salvage device connected to the gland outer tube salvage head 6 is lowered, and the gland outer tube salvage head 6 passes through the broken polished rod part of the plug and is stuck on the outside of the gland outer tube of the plug. At this time, the plug has been unlocked by the cam unlocking salvage head 5. Therefore, the salvage device can be lifted up to pull the plug out of the side hole. The strong magnetic group in the salvage device pocket will adsorb the fished plug on the strong magnetic group to prevent the plug from falling off during the lifting process.

[0038] It can be understood that the above-mentioned embodiments mentioned in the present invention can be combined with each other to form combined embodiments without violating the principle logic. Due to space limitations, the present invention will not elaborate on them.

[0039] Those skilled in the art will understand that in the above-mentioned method of the specific implementation method, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0040] The utility model provides a combined tool for salvaging a broken rod of an eccentric plugger in an injection well. By arranging a supporting salvage head 4, a cam unlocking salvage head 5 and a pressure cap outer cylinder salvage head 6, a variety of salvage methods are provided. The most suitable tool can be selected for different salvage situations, thereby improving the success rate of salvage and increasing the flexibility and applicability of salvage work. By placing a variety of salvage heads in a box body 1 and connecting the box cover 3 to the box body 1 through rotation, the storage and carrying of the tools are convenient, thereby achieving the purpose of improving the efficiency and success rate of salvage operations and reducing salvage time and costs.

[0041] While various embodiments of the present invention have been described above, the above descriptions are illustrative and non-exhaustive, and are not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or technological improvements in the marketplace, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An eccentric plugging device broken rod fishing combination tool for an injection well, characterized in that, include: Box body (1) and box cover (3); The box body (1) is a hollow rectangular structure, and the box body (1) and the box cover (3) are rotatably connected via a plurality of rotating shafts (2); The box body (1) is provided with a supporting salvage head (4), a cam unlocking salvage head (5) and a pressure cap outer cylinder salvage head (6). The said salvaging head (4) is a hollow cylindrical structure, and the upper end of the said salvaging head (4) is provided with a salvaging head joint, and the said salvaging head joint is a cylindrical structure, and the salvaging head joint and the salvaging head (4) are made into one body, and the outer wall of the salvaging head joint is provided with through holes penetrating both sides; The cam unlocking salvage head (5) is a hollow cylindrical structure, and a cam unlocking salvage head upper joint is provided at the upper end of the cam unlocking salvage head (5). The cam unlocking salvage head upper joint is a cylindrical structure, and the cam unlocking salvage head upper joint is integrated with the cam unlocking salvage head (5). The outer wall of the cam unlocking salvage head upper joint is provided with through holes penetrating both sides. The gland outer tube salvage head (6) is a hollow cylindrical structure. A gland outer tube salvage head upper joint is provided on the upper end of the gland outer tube salvage head (6). The gland outer tube salvage head upper joint is a cylindrical structure. The gland outer tube salvage head upper joint and the gland outer tube salvage head (6) are made into one piece. The outer wall of the gland outer tube salvage head upper joint is provided with through holes penetrating both sides.

2. The eccentric plugging tool for injection wells and the combined tool for fishing broken rods according to claim 1, wherein A buffer partition is provided in the box body (1), and three grooves are provided on the buffer partition, and a supporting salvage head (4), a cam unlocking salvage head (5), and a pressure cover outer cylinder salvage head (6) are respectively embedded in the grooves.

3. The eccentric plugging device break rod fishing combination tool for an injection well according to claim 1, characterized in that The inner wall of the upper end of the supporting salvage head (4) is provided with a step, and the radius of the inner wall of the lower end of the supporting salvage head (4) is greater than the radius of the inner wall of the upper end.

4. The eccentric plugging device broken rod fishing combination tool for an injection well according to claim 2, characterized in that, Shock-absorbing material is filled between the buffer partition and the box body (1).

5. The eccentric plugging device break rod fishing combination tool for an injection well according to claim 3, characterized in that, The inner wall of the cam unlocking salvage head (5) is provided with a step, and the radius of the inner wall of the cam unlocking salvage head (5) matches the radius of the inner wall of the upper end of the supporting salvage head (4).

6. The eccentric plugging and fishing combination tool for injection wells according to claim 3, characterized in that The inner wall of the gland outer cylinder salvage head (6) is provided with a step, and the radius of the inner wall of the gland outer cylinder salvage head (6) matches the radius of the inner wall of the lower end of the supporting body salvage head (4).

7. The eccentric plugging tool for a water injection well and the fishing combination tool for a broken rod according to claim 1, wherein, The outer walls of the lower ends of the supporting salvage head (4), the cam unlocking salvage head (5) and the pressure cap outer cylinder salvage head (6) are respectively provided with two rectangular through holes.

8. The eccentric plugging device broken rod fishing combination tool for an injection well according to claim 7, characterized in that, Two rectangular through holes are provided on the outer walls of the lower ends of the supporting salvage head (4), the cam unlocking salvage head (5) and the pressure cap outer cylinder salvage head (6), and are perpendicular to each other.

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