Casing and fishing integrated tool for downhole operation

Abstract

The utility model discloses a downhole operation casing and fishing integrated tool, and relates to the technical field of oil and gas exploitation equipment. A sleeve is fixedly connected to the lower portion of the outer side wall of the basket type slip fishing barrel, a movable block is arranged in the sleeve in a liftable mode, a rectangular groove is formed in the side wall of the movable block in a penetrating mode, a tool apron is connected to the side wall of the sleeve in a penetrating and sliding mode, and a milling tool is fixedly connected to the face, opposite to the movable block, of the tool apron. The inner wall of the sleeve is fixedly connected with a fixing plate, the side wall of the fixing plate is fixedly connected with a guide cylinder, a cylinder opening of the guide cylinder is slidably connected with a guide rod in a penetrating mode, and the rod end of the guide rod is fixedly connected with the side wall of the tool apron. According to the underground salvaging and casing pipe repairing device, underground salvaging and casing pipe repairing can be integrated, so that the underground salvaging and casing pipe repairing do not need to be carried out step by step, the problems of long operation period and high cost caused by repeated tripping of different tools are avoided, and well control risks caused by frequent tripping are avoided.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas extraction equipment technology, specifically to an integrated tool for downhole operations and retrieval. Background Technology

[0002] With the continuous development of oil fields, the number of deep wells, ultra-deep wells, heavy oil wells, and high-temperature, high-volume, high-pressure wells is increasing. The pumps in mechanically operated wells and electric pump wells are gradually being deepened. Various measures such as profile control, water shut-off, acid fracturing, etc. are widely used. Most carbonate formations are completed in open holes, resulting in serious formation leakage. The corresponding wellbore temperature is high. High temperature, high pressure difference, high hydrogen sulfide content, acid fracturing corrosion, etc., cause great damage to downhole tools and casing. Downhole tool and casing string accidents occur frequently.

[0003] Furthermore, as the casing's service life in the wellbore increases, the phenomena of casing leakage, deformation, rupture, and misalignment also increase. Therefore, when retrieving a fallen fish, it is necessary to first eliminate external obstructions in the casing string to avoid affecting the retrieval of the retrieval tube. Then, the retrieval operation is carried out using a basket slip retrieval tube. This construction method requires that downhole retrieval and casing repair be carried out in separate steps, which necessitates the repeated tripping of different tools. Repeated tripping of the drill bit leads to long operation cycles, high costs, and well control risks. In response to the above problems, the inventors have proposed an integrated downhole retrieval tool to solve these issues. Utility Model Content

[0004] To address the current issues of repeated drilling operations required for retrieving fallen fish, which leads to long operation cycles, high costs, and well control risks due to frequent drilling, this utility model aims to provide an integrated tool for downhole fish retrieval.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an integrated tool for downhole operation and retrieval, comprising a basket-type slip retrieval cylinder, a sleeve fixedly connected to the lower part of the outer side wall of the basket-type slip retrieval cylinder, a movable block being vertically and vertically arranged inside the sleeve, a rectangular groove being provided through the side wall of the movable block, a tool holder being slidably connected to the side wall of the sleeve, the tool holder corresponding to the movable block, a milling cutter being fixedly connected to the side of the tool holder facing away from the movable block, a fixing plate being fixedly connected to the inner wall of the sleeve, a guide cylinder being fixedly connected to the side wall of the fixing plate, a guide rod being slidably connected to the opening of the guide cylinder, the rod end of the guide rod being fixedly connected to the side wall of the tool holder, and a spring being sleeved on the side wall of the guide rod.

[0006] Preferably, the basket slip retrieval cylinder includes an upper connector. The basket slip retrieval cylinder is an existing mature product and will not be modified here; it will only be directly applied. The basket slip retrieval cylinder mainly includes an upper connector, a cylinder assembly, basket slips, a control ring, an inner sealing ring, an O-ring, and a guide shoe, etc. The working principle of the basket slip retrieval cylinder is that after the retrieval cylinder captures a fish, by lifting the drill string, the outer spiral sawtooth conical surface of the slips and the corresponding toothed surface inside the cylinder will generate relative displacement, thereby reducing the inner diameter of the slips and tightly gripping the fish. This device, a basket slip retrieval cylinder, is used to retrieve fish from a well. During retrieval, a milling cutter on the sleeve mills and repairs any deformed sections of the casing that are lowered into the well, preventing any disruption to the retrieval process. The fixed plate has a sliding groove on its side wall, and the movable block has a slide rail fixedly connected to its side wall. The slide rail corresponds to and slidably connects to the sliding groove. When the movable block moves up and down, the cooperation between the slide rail and the sliding groove ensures smoother movement.

[0007] Preferably, a housing is fixedly connected to the top surface of the sleeve, and an electric cylinder is disposed inside the housing. A boss is fixedly connected to the top surface of the movable block. The output shaft end of the electric cylinder is fixedly connected to the middle of the top surface of the boss. The housing is used to protect the electric cylinder. When the three electric cylinders are used for control, they must be able to extend and retract their output shafts synchronously so that the milling cutter moves along the same trajectory. The cross-section of the movable block is a right-angled trapezoid. The side of the tool holder facing the movable block is inclined, and the inclined surface of the tool holder matches the inclined surface of the movable block. The guide cylinder is located in a rectangular groove, and one end of the spring is fixedly connected to the end face of the guide cylinder. The other end is fixedly connected to the side wall of the tool holder. When the movable block moves up and down, the rectangular groove can prevent the guide cylinder from affecting the movement of the movable block. When it falls and encounters a deformed section of the casing that needs to be milled for repair, the electric cylinder is activated. The movable block moves down under the action of the output shaft of the electric cylinder to push the tool holder and move the milling cutter out of the sleeve. At this time, the spring is in a stretched state. The upper connector is used to connect the external drill string and the basket slip retrieval tube. At this time, the drill string causes the basket slip retrieval tube to rotate, which in turn causes the extended milling cutter to rotate to mill and repair the deformed section of the casing in the well, so as to avoid affecting the falling and retrieval of the basket slip retrieval tube.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: it enables downhole fishing and casing repair to be carried out in an integrated operation, thus eliminating the need for downhole fishing and casing repair to be carried out in separate steps. This avoids the need to run different tools multiple times, which would result in long operation cycles and high costs. It also avoids the situation where frequent tripping of the drill string could easily lead to well control risks. When fishing with a basket slip fishing tube, when encountering a deformed section of the casing, the milling cutter can be moved out of the casing and rotated with the help of the external drill string to mill and repair the deformed section of the casing in the well, so as not to affect the descent and fishing of the basket slip fishing tube. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the internal structure of the sleeve of this utility model.

[0012] Figure 3 This is a schematic diagram showing the cooperation between the movable block and the fixed plate of this utility model.

[0013] In the diagram: 1. Basket-type retrieval cylinder; 2. Upper connector; 3. Sleeve; 4. Tool holder; 5. Housing; 6. Electric cylinder; 7. Movable block; 8. Rectangular groove; 9. Boss; 10. Milling cutter; 11. Slide rail; 12. Fixing plate; 13. Slide groove; 14. Guide cylinder; 15. Guide rod; 16. Spring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example: Figure 1-3As shown, this utility model provides an integrated tool for downhole retrieval, including a basket-type slip retrieval cylinder 1. A sleeve 3 is fixedly connected to the lower part of the outer wall of the basket-type slip retrieval cylinder 1. A movable block 7 is vertically mounted inside the sleeve 3. A rectangular groove 8 is provided through the side wall of the movable block 7. A tool holder 4 is slidably connected to the side wall of the sleeve 3. The tool holder 4 corresponds to the movable block 7. A milling cutter 10 is fixedly connected to the side of the tool holder 4 facing away from the movable block 7. A fixing plate 12 is fixedly connected to the inner wall of the sleeve 3. A guide cylinder 14 is fixedly connected to the side wall of the fixing plate 12. A guide rod 15 is slidably connected to the opening of the guide cylinder 14. The rod end of the guide rod 15 is fixedly connected to the side wall of the tool holder 4, and a spring 16 is sleeved on the side wall of the guide rod 15.

[0016] The basket-type retrieval cylinder 1 includes an upper connector 2.

[0017] By adopting the above technical solution, the basket slip retrieval tube 1 is an existing mature product, and it will not be improved here, but will be directly applied. The basket slip retrieval tube 1 mainly includes an upper connector 2, a tube assembly, basket slips, a control ring, an inner sealing ring, an O-ring, and a guide shoe, etc. The working principle of the basket slip retrieval tube 1 is that when the retrieval tube captures a fish, by lifting the drill string, the outer spiral sawtooth cone surface of the slip and the corresponding tooth surface inside the tube will generate relative displacement, thereby reducing the inner diameter of the slip, tightly grasping the fish and retrieving it. When the basket slip retrieval tube 1 is being lowered into the well, the milling cutter 10 set on the sleeve 3 is used to mill and repair the deformed section of the casing in the well during the descent, so as to avoid affecting the descent and retrieval of the basket slip retrieval tube 1.

[0018] The top surface of the sleeve 3 is fixedly connected to the housing 5, and the inside of the housing 5 is provided with an electric cylinder 6. The top surface of the movable block 7 is fixedly connected to the boss 9, and the output shaft end of the electric cylinder 6 is fixedly connected to the middle of the top surface of the boss 9.

[0019] By adopting the above technical solution, the housing 5 is used to protect the electric cylinder 6. When the three electric cylinders 6 are used for control, the three electric cylinders 6 need to extend and retract their output shafts synchronously so that the moving trajectory of the milling cutter 10 is the same.

[0020] The cross-section of the movable block 7 is a right trapezoid. The side of the tool holder 4 facing the movable block 7 is inclined, and the inclined surface of the tool holder 4 matches the inclined surface of the movable block 7. The guide cylinder 14 is located in the rectangular groove 8. One end of the spring 16 is fixedly connected to the end face of the guide cylinder 14, and the other end of the spring 16 is fixedly connected to the side wall of the tool holder 4.

[0021] By adopting the above technical solution, when the movable block 7 moves up and down, the rectangular groove 8 can prevent the guide cylinder 14 from affecting the movement of the movable block 7. When it falls and encounters a deformed section of the casing that needs to be milled and repaired, the electric cylinder 6 is activated. The movable block 7 moves down under the action of the output shaft of the electric cylinder 6 to push the tool holder 4, so that the milling cutter 10 moves out of the sleeve 3. At this time, the spring 16 is in a stretched state. The upper connector 2 is used to connect the external drill string and the basket slip retrieval tube 1. At this time, the drill string makes the basket slip retrieval tube 1 rotate, which in turn makes the extended milling cutter 10 rotate to mill and repair the deformed section of the casing in the well, so as to avoid affecting the falling and retrieval of the basket slip retrieval tube 1.

[0022] The side wall of the fixed plate 12 is provided with a slide groove 13, and the side wall of the movable block 7 is fixedly connected with a slide rail 11. The slide rail 11 corresponds to the slide groove 13 and is slidably connected.

[0023] By adopting the above technical solution, when the movable block 7 moves up and down, the cooperation between the slide rail 11 and the slide groove 13 makes the movement of the movable block 7 more stable.

[0024] Working principle: When in use, the basket slip retrieval cylinder 1 is fixed to the external drill string through the upper connector 2. When it is necessary to lower the basket slip retrieval cylinder 1 into the well, the connected basket slip retrieval cylinder 1 is placed in the well. When it encounters the deformed section of the casing during the descent, the electric cylinder 6 is activated. The movable block 7 moves down under the action of the output shaft of the electric cylinder 6 to push the cutter holder 4, so that the milling cutter 10 moves out of the sleeve 3. At this time, the spring 16 is in a stretched state, and the basket slip retrieval cylinder 1 is rotated through the external drill string, which in turn allows the extended milling cutter 10 to rotate to mill and repair the deformed section of the casing in the well, so as to avoid affecting the descent and retrieval of the basket slip retrieval cylinder 1.

[0025] After the milling repair of the deformed section of the sleeve is completed, the electric cylinder 6 is controlled to move the movable block 7 upward, and the spring 16 begins to retract. Under the action of the elastic force of the spring 16, the tool holder 4 can be pulled back, which in turn allows the milling cutter 10 to move back into the sleeve 3.

[0026] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0027] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A downhole fishing tool integrating trap and retrieval, comprising a basket-type slip retrieval cylinder (1), characterized in that: A sleeve (3) is fixedly connected to the lower part of the outer wall of the basket-type retrieval cylinder (1). A movable block (7) is provided inside the sleeve (3) and can be raised and lowered. A rectangular groove (8) is provided through the side wall of the movable block (7). A tool holder (4) is slidably connected to the side wall of the sleeve (3). The tool holder (4) corresponds to the movable block (7). A milling cutter (10) is fixedly connected to the side of the tool holder (4) facing away from the movable block (7). A fixing plate (12) is fixedly connected to the inner wall of the sleeve (3). A guide cylinder (14) is fixedly connected to the side wall of the fixing plate (12). A guide rod (15) is slidably connected to the opening of the guide cylinder (14). The rod end of the guide rod (15) is fixedly connected to the side wall of the tool holder (4), and a spring (16) is sleeved on the side wall of the guide rod (15).

2. The integrated downhole fishing and retrieval tool as described in claim 1, characterized in that, The basket-type retrieval tube (1) includes an upper connector (2).

3. The integrated downhole fishing and retrieval tool as described in claim 1, characterized in that, The top surface of the sleeve (3) is fixedly connected to the housing (5), and an electric cylinder (6) is provided inside the housing (5).

4. The integrated downhole fishing and retrieval tool as described in claim 3, characterized in that, The top surface of the movable block (7) is fixedly connected to a boss (9), and the output shaft end of the electric cylinder (6) is fixedly connected to the middle of the top surface of the boss (9).

5. The integrated downhole fishing and retrieval tool as described in claim 1, characterized in that, The cross-section of the movable block (7) is a right trapezoid, the side of the knife holder (4) facing the movable block (7) is inclined, and the inclined surface of the knife holder (4) matches the inclined surface of the movable block (7).

6. The integrated downhole fishing and retrieval tool as described in claim 1, characterized in that, The guide cylinder (14) is located in the rectangular groove (8), one end of the spring (16) is fixedly connected to the end face of the guide cylinder (14), and the other end of the spring (16) is fixedly connected to the side wall of the tool holder (4).

7. The integrated downhole fishing and retrieval tool as described in claim 1, characterized in that, The side wall of the fixed plate (12) is provided with a sliding groove (13), and the side wall of the movable block (7) is fixedly connected with a slide rail (11). The slide rail (11) corresponds to the sliding groove (13) and is slidably connected.

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