Wellbore strengthening tool and method of strengthening a wellbore

Abstract

The present application provides a well wall strengthening tool, comprising a drill string, which comprises a first joint, a second joint arranged downstream of the first joint, and a sleeve arranged between the first joint and the second joint, wherein a through hole is arranged on the sleeve, and a well wall strengthening mechanism, which comprises a coiled pipe sleeved outside the sleeve, and an inflation cavity arranged between the sleeve and the coiled pipe and communicated with the through hole, wherein the inflation cavity is configured to expand after receiving drilling fluid from the sleeve through the through hole, so as to drive the coiled pipe to move radially outward and form a sealing connection with the well wall. In the present application, each part acts relatively independently, the requirement for overall sealing is relatively obviously reduced compared with the prior art, and complex formation plugging can be achieved multiple times without loss of the borehole diameter.

Description

Technical Field

[0001] This invention relates to the field of complex wellbore treatment technology, specifically to a wellbore strengthening tool and a method for strengthening wellbore walls. Background Technology

[0002] Currently, during the drilling process, after the drill bit breaks the formation rock, it disrupts the stress state of the formation, often leading to complex drilling situations such as wellbore instability or drilling fluid loss when encountering fractured formations. To deal with wellbore loss and complex wellbore instability, the first step is usually to adjust the properties of the drilling fluid. If wellbore instability or complex leakage still exists after adjusting the properties of the drilling fluid and changing the drilling fluid system, casing is usually installed for isolation. However, casing isolation requires sacrificing most of the wellbore diameter, and the next drilling can only be done with a small drill bit.

[0003] In ultra-deep well drilling, encountering complex formations and using casing to isolate these formations increases the number of wellbore structural stages, reduces the completed wellbore size, and impacts reservoir stimulation and production efficiency. Currently, to address wellbore stability and complex leakage issues, both temporary rigid wellbore isolation with corrugated expansion tubing and solid expansion tubing technologies can mitigate the impact of wellbore collapse and leakage on safe drilling.

[0004] Expandable corrugated pipe technology: A circular metal pipe is cold-pressed into a non-circular cross-section to reduce its outer diameter, creating a corrugated shape. The corrugated pipe is then driven into the complex well section to be sealed using drill pipe. Pressure is applied within the drill string to restore the corrugated pipe to its circular shape, allowing it to contact the formation and seal the complex formation. The challenge of this technology lies in maintaining sufficient sealing performance during the restoration of the circular shape. Furthermore, the metal pipe has small-diameter cylindrical structures at both ends, requiring separate expansion tools and milling shoes after expansion for mechanical expansion and borehole milling. Each expansion operation takes at least one week.

[0005] Solid expandable tubing technology: This technology uses metal tubing to temporarily isolate complex formations. The tubing is circular before entering the well. After insertion, pressure is applied within the drill string, driving an expansion cone inside the launch chamber at the bottom of the tubing string upwards. This further enlarges the diameter of the circular tubing downhole, allowing it to conform to the wellbore and seal the complex formation. Solid expandable tubing technology typically requires cementing operations. Early technologies often required the expandable tubing to be suspended from the upper casing shoe for expansion. Currently, open-hole solid expandable tubing technology has been developed.

[0006] However, both of the above-mentioned temporary rigid wellbore reinforcement methods require maintaining high pressure inside the drill string and tubing, and also have disadvantages such as high expansion deformation pressure, multiple construction procedures, and long operation cycles.

[0007] Therefore, it is desirable in the art to provide a wellbore strengthening tool to solve the above-mentioned technical problems. Summary of the Invention

[0008] The purpose of this invention is to provide a wellbore reinforcement tool in which each part functions relatively independently, the overall sealing requirement is significantly reduced compared to the prior art, and complex formation plugging can be achieved multiple times without losing the wellbore diameter.

[0009] According to a first aspect of the present invention, a wellbore reinforcement tool is provided, comprising a drill string including a first connector, a second connector disposed downstream of the first connector, and a sleeve disposed between the first connector and the second connector, wherein a through hole is provided in the sleeve.

[0010] The wellbore reinforcement mechanism includes a rolled tube sleeved outside the sleeve, and an expansion cavity disposed between the sleeve and the rolled tube and communicating with the through hole.

[0011] The expansion chamber is configured to expand after receiving drilling fluid from the sleeve through the through hole, thereby causing the hose reel to move radially outward and form a sealed connection with the well wall.

[0012] In one embodiment, a hollow metal ring is provided at the junction of the first connector and the sleeve, thereby allowing drilling fluid from the through hole to flow only into the expansion chamber.

[0013] In one embodiment, the hollow metal ring forms a threaded connection with the first connector.

[0014] In one embodiment, the expansion cavity is made of rubber, and the top of the expansion cavity is vulcanized onto the hollow metal ring.

[0015] In one embodiment, a radially inwardly extending first step is formed at the junction of the second connector and the sleeve, and the coiled tube initially abuts axially against the first step.

[0016] In one embodiment, the tube is made of rolled metal sheet and includes a first side end and a second side end, wherein a locking portion extending radially inward is provided on the first side end, and an engaging portion for extending through the locking portion is formed on the second side end.

[0017] In one embodiment, the outer wall surface of the engaging portion is provided with a plurality of spaced-apart, radially outward and downwardly inclined first wedge-shaped teeth, and the inner wall surface of the locking portion is provided with a plurality of spaced-apart second wedge-shaped teeth for engaging with the first wedge-shaped teeth.

[0018] In one embodiment, the wellbore strengthening tool further includes a ball seat fixed within the sleeve by a pin, the through hole being radially disposed on the sleeve, and initially the through hole being axially positioned within the range of the ball seat.

[0019] By throwing a ball to press down and cut the pin, the ball seat is forced to move downstream to open the through hole.

[0020] In one embodiment, a second step is formed on the inner wall of the second joint, extending radially outward and for axially abutting against the ball seat.

[0021] According to a second aspect of the present invention, a method for strengthening a wellbore using a wellbore strengthening tool as described above is provided, comprising the following steps:

[0022] S1. After the well wall strengthening tool is lowered to the predetermined position, the pin is cut off by throwing a ball to press down, thereby causing the ball seat to move downstream to open the through hole;

[0023] S2. The expansion chamber expands after receiving drilling fluid from the sleeve through the through hole, thereby causing the hose reel to move radially outward, and is locked by the engaging part and the locking part to form a sealed connection between the hose reel and the well wall.

[0024] S3. Lift up and remove the drill string and expansion chamber.

[0025] Compared with the prior art, the advantages of the present invention are as follows:

[0026] Firstly, the coiled pipe in this invention can expand radially outward under the action of the expansion chamber until it adheres to the well wall and forms a sealed connection. At this point, the locking part and the engaging part form a lock to limit the deformation of the coiled pipe. This achieves the purpose of temporary isolation of the well wall in complex formations. Compared with existing technologies, this method has advantages such as simple structure, fewer expansion steps, and lower construction requirements.

[0027] Secondly, since the present invention only requires the engaging part to gradually disengage from the locking part to lock the deformation of the rolled tube, compared with the sealing technology in the prior art, the present invention only needs to maintain a low hydraulic pressure to achieve the effect of expanding the rolled tube, thereby significantly reducing various requirements in the construction process.

[0028] Thirdly, the top of the expansion chamber in this invention can be vulcanized onto the hollow metal ring. Therefore, under the action of the hollow metal ring, the drilling fluid flowing out through the through-hole can only enter the expansion chamber, thereby enhancing the flow capacity of the through-hole, the hollow metal ring, and the expansion chamber—the flow channel for drilling fluid—to improve the efficiency and speed of wellbore strengthening. Furthermore, since the expansion chamber can be suspended integrally on the hollow metal ring through vulcanization, it facilitates subsequent lifting operations after the wellbore strengthening work is completed.

[0029] Fourth, each part of the present invention functions relatively independently, the overall sealing requirement is significantly reduced compared to the prior art, and complex formation plugging can be achieved multiple times without losing the wellbore diameter. Attached Figure Description

[0030] The invention will now be described in detail with reference to the accompanying drawings, in which:

[0031] Figure 1 The schematic diagram illustrates the structure of the wellbore strengthening tool according to the present invention;

[0032] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0033] Figure 3 The schematic diagram illustrates the wellbore strengthening tool according to the present invention in its working state;

[0034] Figure 4 This is a schematic diagram of the drum in the wellbore strengthening tool according to the present invention in a first state;

[0035] Figure 5 This is a schematic diagram showing the drum in the wellbore strengthening tool according to the present invention in a second state.

[0036] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0037] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0038] Directional terms such as "upstream," "above," or similar terms refer to the direction closer to the wellhead, i.e. Figure 1 The direction from the top of the wellhead. Directional terms such as "downstream," "below," or similar terms refer to the direction away from the wellhead, i.e. Figure 1 The bottom direction in the middle.

[0039] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0041] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] The invention will now be further described with reference to the accompanying drawings.

[0043] Figure 1 The schematic diagram illustrates the structure of the wellbore strengthening tool 100 according to the present invention;

[0044] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0045] Figure 3 The schematic diagram shows the wellbore strengthening tool 100 according to the present invention in a working state;

[0046] Figure 4 This is a schematic diagram of the drum 20 in the wellbore strengthening tool 100 according to the present invention in a first state;

[0047] Figure 5 This is a schematic diagram of the reel 20 in the wellbore strengthening tool 100 according to the present invention in a second state.

[0048] like Figure 1 As shown, according to a first aspect of the present invention, a wellbore strengthening tool 100 is provided, which includes a drill string. The drill string includes a first connector 11, a second connector 12, and a sleeve 13.

[0049] Preferably, the first connector 11 is located at the upper part, and a drill rod clip (not shown) is provided at the top of the first connector 11 for connecting the upper drill string (not shown).

[0050] Preferably, the second connector 12 is located at the lower part, in other words, the second connector 12 is located downstream of the first connector 11, and a drill rod clip (not shown) is provided at the bottom end of the second connector 12 for connecting the guide shoe (not shown) or the drill bit (not shown).

[0051] Preferably, the sleeve 13 is disposed between the first connector 11 and the second connector 12. It is easy to understand that the sleeve 13 in this invention is composed of two parts: a first sleeve portion 132 and a second sleeve portion 133. The first sleeve portion 132 is fixedly connected to the lower end face of the first connector 11, and the second sleeve portion 133 is fixedly connected to the upper end face of the second connector 12. The first sleeve portion 132 and the second sleeve portion 133 are connected by a threaded connection.

[0052] In one embodiment, such as Figure 2 As shown, a through hole 131 is provided on the sleeve 13. Preferably, in the open state, drilling fluid from inside the sleeve 13 can flow to the outside through the through hole 131.

[0053] According to the present invention, such as Figure 2 As shown, the wellbore strengthening tool 100 also includes a ball seat 40 fixed inside the sleeve 13 by a pin 401. Preferably, the outer peripheral surface of the ball seat 40 is in a sealing connection with the inner peripheral surface of the sleeve 13.

[0054] In a preferred embodiment, the through hole 131 is radially disposed on the sleeve 13, and initially, the through hole 131 is axially located within the range of the ball seat 40. It is readily understood that during the lowering of the wellbore strengthening tool 100, the through hole 131 remains closed under the action of the ball seat 40, thereby ensuring that the through hole 131 is only opened after the wellbore strengthening tool 100 has been lowered to the predetermined position, thus improving the success rate of wellbore strengthening.

[0055] It is easy to understand that once the well wall strengthening tool 100 is lowered to the predetermined position, the pin 401 can be cut by throwing a ball to apply pressure, thereby causing the ball seat 40 to move downstream to open the through hole 131, which in turn helps to carry out subsequent well wall strengthening work.

[0056] According to the present invention, the wellbore strengthening tool 100 further includes a wellbore strengthening mechanism. For example... Figure 1 As shown, the wellbore reinforcement mechanism includes a coiled tube 20 and an expansion chamber 30.

[0057] Preferably, the coiled pipe 20 is sleeved on the outside of the casing 13; and the expansion cavity 30 is disposed between the casing 13 and the coiled pipe 20, and the expansion cavity 30 can communicate with the casing 13 through the through hole 131 to receive drilling fluid.

[0058] In one embodiment, such as Figure 1 and 3As shown, a second step 122 extending radially outward is formed on the inner wall of the second connector 12. Preferably, during the process of shearing the pin 401 and the ball seat 40 descending, the second step 122 can receive and form axial abutment with the ball seat 40, thereby restricting the position of the ball seat 40 in the axial direction.

[0059] It is easy to understand that when the ball seat 40 and the second step 122 axially abut against each other, the outer peripheral surface of the ball seat 40 and the inner peripheral surface of the second connector 12 form a sealed connection, thereby causing the drill string to form a closed environment, so as to ensure that the drilling fluid in the sleeve 13 can flow smoothly through the through hole 131 to the external expansion chamber 30.

[0060] After the through hole 131 is opened, the drilling fluid in the sleeve 13 can flow into the expansion chamber 30 through the through hole 131. As the total volume of the drilling fluid increases, the expansion chamber 30 will gradually expand and push the hose 20 to move radially outward until a sealed connection is formed between the hose 20 and the well wall, thereby completing the reinforcement of the well wall.

[0061] In one embodiment, such as Figure 2 As shown, a hollow metal ring 111 is also provided at the junction of the first connector 11 and the sleeve 13. It is easy to understand that the hollow metal ring 111 can serve as a transmission medium for drilling fluid, thereby connecting the through hole 131 with the expansion chamber 30. This ensures that the drilling fluid flowing out through the through hole 131 can only flow to the expansion chamber 30, thereby ensuring that the expansion chamber 30 can expand smoothly and further improving the success rate of wellbore reinforcement work.

[0062] In a preferred embodiment, the hollow metal ring 111 is threadedly connected to the first connector 11. In other words, the hollow metal ring 111 and the first connector 11 are connected by a fine thread, thereby improving the stability of the hollow metal ring 111 during the reinforced wellbore operation.

[0063] After the through hole 131 is opened, the drilling fluid in the sleeve 13 can flow into the expansion chamber 30 through the through hole 131 and the hollow metal ring 111 in sequence, thereby ensuring that the drilling fluid flowing out through the through hole 131 can only flow into the expansion chamber 30, so as to achieve the purpose of completing the well wall strengthening work and improving the success rate of well wall strengthening.

[0064] In one embodiment, the expansion chamber 30 is made of rubber, and the top of the expansion chamber 30 is vulcanized onto the hollow metal ring 111. This ensures that the expansion chamber 30 communicates only with the hollow metal ring 111 and can smoothly receive drilling fluid from the hollow metal ring 111, thereby improving the success rate of wellbore reinforcement.

[0065] In this way, on the one hand, the flow capacity of the drilling fluid supply channel, which consists of through hole 131, hollow metal ring 111 and expansion cavity 30, is enhanced, thereby improving the efficiency and speed of wellbore strengthening work; on the other hand, the sulfidation method allows the expansion cavity 30 to be suspended as a whole on the hollow metal ring 111, which helps with the subsequent lifting work after the wellbore strengthening work is completed.

[0066] In one embodiment, such as Figure 1 and 3 As shown, a radially inwardly extending first step 121 is formed at the junction of the second connector 12 and the sleeve 13. Preferably, the coil 20 is able to axially abut against the first step 121 in the initial state.

[0067] Furthermore, since the inner diameter of the coiled pipe 20 in its initial state is less than or equal to the outer diameter of the first connector 11 and the second connector 12, the coiled pipe 20 can be restrained at a fixed position outside the sleeve 13 under the combined action of the first connector 11 and the second connector 12 during the lowering process, thereby ensuring that the well wall strengthening tool 100 can be smoothly lowered to the predetermined position inside the well.

[0068] In one specific embodiment, the coiled tube 20 is made of rolled metal sheet. This effectively improves the overall structural stability of the coiled tube 20, so that under the action of the expansion chamber 30, the coiled tube 20 can smoothly expand radially outward, thereby forming a sealed connection with the well wall and achieving the purpose of strengthening the well wall.

[0069] In one embodiment, such as Figure 4 and 5 As shown, the coil 20 includes a first side end 21 (end face) and a second side end 22 (end face). Preferably, a locking portion 211 extending radially inward is provided on the first side end 21, and an engaging portion 221 for extending through the locking portion 211 is formed on the second side end 22. It is easy to understand that the locking portion 211 and the engaging portion 221, when engaged, can achieve the effects of locking and preventing retraction.

[0070] As is easily understood, after the expansion chamber 30 receives drilling fluid and expands, the hose reel 20 expands radially outward under the action of the expansion chamber 30. At this time, the engaging part 221 will gradually disengage from the locking part 211. Until the hose reel 20 adheres to the well wall and forms a sealed connection, the locking part 211 and the engaging part 221 lock together to limit the deformation of the hose reel 20.

[0071] In one specific embodiment, such as Figure 4 and 5As shown, the outer wall surface of the engaging portion 221 is provided with a plurality of spaced-apart, radially outward and downward inclined first wedge-shaped teeth 222; while the inner wall surface of the locking portion 211 is provided with a plurality of spaced-apart, radially outward and upward inclined second wedge-shaped teeth 212. It is easy to understand that the first wedge-shaped teeth 222 and the second wedge-shaped teeth 212 are always in an engaging state, thereby achieving the effect of locking and preventing the reel in the tube 20.

[0072] Compared to existing technologies, this invention utilizes the expansion chamber 30 to receive drilling fluid, causing the tubing 20 to expand radially outward. Furthermore, during the expansion process, the first wedge-shaped tooth 222 on the engaging portion 221 and the second wedge-shaped tooth 212 on the locking portion 211 act as a locking and anti-reverse mechanism, ensuring that the tubing 20 can precisely conform to the wellbore, thereby improving the wellbore reinforcement capability.

[0073] In other words, the present invention essentially achieves precise fit between the hose reel 20 and the well wall by changing the position of the engaging part 221 on the locking part 211. Therefore, compared with the prior art, the present invention has advantages such as simple structure, fewer expansion steps, and lower construction requirements.

[0074] The assembly of the wellbore reinforcement tool 100 involves the following steps: First, the top of the expansion chamber 30 needs to be vulcanized onto the hollow metal ring 111 to ensure that drilling fluid can flow between the hollow metal ring 111 and the expansion chamber 30. Then, the hollow metal ring 111 is installed on the first sleeve portion 132 of the first connector 11 through fine threads to ensure the stability of the hollow metal ring 111 during downhole operation. Finally, the hose reel 20 is inserted into the sleeve 13 from bottom to top, and then the second connector 12 is connected to ensure that the axial position of the hose reel 20 is relatively fixed and cannot move under the action of the first connector 11 and the second connector 12.

[0075] Preferably, the outer diameter of the tube 20 before and after deformation needs to be determined based on the drill string size and wellbore size.

[0076] According to a second aspect of the present invention, a method for strengthening a wellbore using a wellbore strengthening tool as described above is provided, comprising the following steps:

[0077] First, the assembled wellbore strengthening tool 100 is lowered to the designated position;

[0078] Then, by throwing a ball to press and shear the pin 401, the ball seat 40 is forced to move downstream to open the through hole 131. The ball seat 40 will then continue to move downstream until it forms axial contact with the second step 122.

[0079] Subsequently, the drilling fluid from the sleeve 13 flows into the expansion chamber 30 through the through hole 131 and the hollow metal ring 111 under pressure.

[0080] Subsequently, as the drilling fluid gradually increases, the expansion chamber 30 expands under the action of the drilling fluid, and pushes the hose 20 to expand radially outward until the hose 20 adheres to the well wall and forms a sealed connection, thereby locking the hose 20 through the engaging part 221 and the locking part 211 to achieve the shaping of the hose 20.

[0081] Specifically, during the expansion of the hose 20, the engaging part 221 gradually disengages from the locking part 211 until the hose 20 adheres to the well wall and forms a sealed connection. At this point, the first wedge-shaped tooth 222 on the engaging part 221 locks with the second wedge-shaped tooth 212 on the locking part 211 to ensure that the hose 20 can accurately adhere to the well wall, thereby improving the well wall's strengthening ability.

[0082] It is easy to understand that since the first wedge tooth 222 and the second wedge tooth 212 can always mesh with each other, the locking part 211 can effectively prevent the locking part 221 from retracting during the expansion of the coil 20.

[0083] Finally, the drill string and expansion chamber 30 are lifted and removed.

[0084] In a preferred embodiment, the above steps can be repeated to achieve multiple wellbore reinforcement operations on complex formations, thereby ensuring safe drilling through complex formations.

[0085] Compared with existing technologies, the present invention has the following advantages:

[0086] Firstly, the coiled pipe 20 in this invention can expand radially outward under the action of the expansion chamber 30 until it adheres to the well wall and forms a sealed connection. At this point, the locking part 211 and the engaging part 221 lock the coiled pipe 20 to limit its deformation. This achieves the purpose of temporary isolation of the well wall in complex formations. Compared with existing technologies, this method has advantages such as simple structure, fewer expansion steps, and lower construction requirements.

[0087] Secondly, since the present invention only requires the engaging part 221 to gradually disengage from the locking part 211 to lock the deformation of the coil 20, compared with the sealing technology in the prior art, the present invention only needs to maintain a low hydraulic pressure to achieve the effect of expanding the coil 20, thereby significantly reducing various requirements in the construction process.

[0088] Thirdly, the top of the expansion cavity 30 in this invention can be vulcanized onto the hollow metal ring 111. Therefore, under the action of the hollow metal ring 111, the drilling fluid flowing out through the through hole 131 can only enter the expansion cavity 30, thereby enhancing the flow capacity of the through hole 131, the hollow metal ring 111, and the expansion cavity 30—the flow channel for drilling fluid—to improve the efficiency and speed of wellbore strengthening work. Furthermore, since the expansion cavity 300 can be suspended integrally on the hollow metal ring 111 through vulcanization, it facilitates subsequent lifting operations after the wellbore strengthening work is completed.

[0089] Fourth, each part of the present invention functions relatively independently, the overall sealing requirement is significantly reduced compared to the prior art, and complex formation plugging can be achieved multiple times without losing the wellbore diameter.

[0090] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for reinforcing a wellbore using a wellbore strengthening tool, the wellbore strengthening tool comprising: A drill string includes a first connector (11), a second connector (12) disposed downstream of the first connector (11), and a sleeve (13) disposed between the first connector (11) and the second connector (12), wherein the sleeve (13) is provided with a through hole (131), and The well wall reinforcement mechanism includes a coiled tube (20) sleeved outside the sleeve (13) and an expansion cavity (30) disposed between the sleeve (13) and the coiled tube (20) and communicating with the through hole (131). The expansion chamber (30) is configured to expand after receiving drilling fluid from the sleeve (13) through the through hole (131), thereby causing the hose reel (20) to move radially outward and form a sealed connection with the well wall. The coil (20) includes a first side end (21) and a second side end (22). A locking portion (211) extending radially inward is provided on the first side end (21), and a locking portion (221) for extending through the locking portion (211) is formed on the second side end (22). The locking portion (221) locks the coil (20) with the locking portion (211) to achieve shaping. The wellbore reinforcement tool also includes a ball seat (40) fixed inside the sleeve (13) by a pin (401). The through hole (131) is radially disposed on the sleeve (13). In the initial state, the through hole (131) is axially within the range of the ball seat (40). The method includes the following steps: S1. After the well wall strengthening tool is lowered to the predetermined position, the pin (401) is cut off by throwing a ball to press down, thereby causing the ball seat (40) to move downstream to open the through hole (131). S2. The expansion chamber (30) expands after receiving drilling fluid from the sleeve (13) through the through hole (131), thereby causing the hose reel (20) to move radially outward, and is locked by the engaging part (221) and the locking part (211) to form a sealed connection between the hose reel (20) and the well wall. S3. Lift up and remove the drill string and expansion chamber (30).

2. The method according to claim 1, characterized in that, An inner hollow metal ring (111) is also provided at the junction of the first connector (11) and the sleeve (13), thereby allowing drilling fluid from the through hole (131) to flow only into the expansion chamber (30).

3. The method according to claim 2, characterized in that, The hollow metal ring (111) forms a threaded connection with the first connector (11).

4. The method according to claim 3, characterized in that, The expansion cavity (30) is made of rubber, and the top of the expansion cavity (30) is vulcanized on the hollow metal ring (111).

5. The method according to claim 4, characterized in that, A first step (121) extending radially inward is formed at the junction of the second connector (12) and the sleeve (13), and the coil (20) abuts axially against the first step (121) in the initial state.

6. The method according to claim 5, characterized in that, The tube (20) is made of rolled metal sheet.

7. The method according to claim 6, characterized in that, The outer wall surface of the engaging portion (221) is provided with a plurality of spaced-apart first wedge teeth (222) that extend radially outward and downward, and the inner wall surface of the locking portion (211) is provided with a plurality of spaced-apart second wedge teeth (212) that engage with the first wedge teeth (222).

8. The method according to claim 7, characterized in that, A second step (122) is formed on the inner wall of the second joint (12) extending radially outward and used to axially abut against the ball seat (40).

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