Well wall supporting device and construction method thereof

Abstract

The invention discloses a well wall supporting device and a construction method thereof. And the number of the hinged rods is two, the hinged rods are movably arranged on the two sides of the hinged base, connecting pieces are arranged at the ends of one set of hinged rods, buckling pieces matched with the connecting pieces are arranged at the ends of the other set of hinged rods, and adjusting sliding grooves are formed in the two sets of hinged rods. When the equipment is used, the multiple sets of well wall supporting devices are connected through the connecting pieces and the buckling pieces so as to be annularly arranged around the well wall, then the piston rods are connected with hydraulic equipment, the internal pressure of the hydraulic adjusting part is increased, and therefore an annular structure which abuts against one another is formed between the supporting devices; and along with the continuous increase of the internal pressure of the hydraulic adjusting part, the hydraulic telescopic pipe can be pushed to enable the abutting plate to make contact with the well wall, so that the well wall is supported, the adaptability of the structure is good, the device can be adapted to use scenes with different diameters, and the overall operation efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of supporting structures, and in particular to a shaft wall supporting device and a construction method thereof. Background Art

[0002] In the fields of oil and gas field development, mineral resource exploration, and underground engineering construction, well support is one of the key technologies to ensure operational safety and prevent formation collapse and well instability. Although traditional well support methods, such as grouting reinforcement and steel pipe support, can meet the support needs to a certain extent, they have problems such as long construction period, high cost, and limited support effect. Especially under complex geological conditions, such as soft rock formations and broken zones, traditional support methods often fail to achieve ideal support effects.

[0003] Therefore, the development of new, efficient and reliable shaft support devices is of great significance for improving operation safety, reducing support costs and improving overall operation efficiency. Therefore, a shaft support device and a construction method thereof are proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a well wall support device to address the above-mentioned deficiencies and achieve efficient and reliable well wall support effects.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a shaft wall support device, comprising:

[0006] Articulated seat;

[0007] Articulated rods, the number of which is two groups and which are movably arranged on both sides of the articulated seat, the end of one group of articulated rods is provided with a connecting piece, the end of the other group of articulated rods is provided with a buckle piece matched with the connecting piece, and both groups of articulated rods are provided with an adjustment slot;

[0008] A hydraulic connecting rod, wherein the hydraulic connecting rod is movably arranged between the two groups of hinged rods, and adjustment pins matching the adjustment slide grooves are arranged at both ends of the hydraulic connecting rod, and a hydraulic adjustment part is arranged in the center of the hydraulic connecting rod;

[0009] A piston rod, the piston rod is fixedly connected to the articulated seat and penetrates the hydraulic adjustment part and is slidably and sealedly connected to the hydraulic adjustment part, the piston rod is used to provide hydraulic oil to the hydraulic adjustment part to adjust the position of the hydraulic connecting rod, so as to adjust the opening and closing angle of the articulated rod;

[0010] A hydraulic telescopic tube, which is arranged on the hinge seat and is connected to the piston rod;

[0011] A contact plate, which is arranged at the output end of the hydraulic telescopic tube and is used to contact the well wall;

[0012] A plurality of groups of the well wall supporting devices are connected by connecting pieces and buckling pieces to be arranged in a ring shape around the well wall to support the well wall.

[0013] Furthermore, a sealing sheet is provided at a section of the piston rod located inside the hydraulic adjustment part;

[0014] The hydraulic adjustment part is provided with a hydraulic cavity corresponding to the sealing sheet;

[0015] An expansion pipeline and a support pipeline are arranged in the piston rod;

[0016] The piston rod is provided with a first liquid guide hole and a second liquid guide hole for respectively connecting the expansion pipeline and the support pipeline with the hydraulic chamber;

[0017] When the piston rod supplies fluid, it is used to push the hydraulic connecting rod to move close to the hinge seat and drive the hydraulic telescopic tube to operate so that the contact plate contacts the well wall.

[0018] Furthermore, a barrier is provided inside the second liquid guiding hole, and the barrier is used to block the second liquid guiding hole;

[0019] The barrier is a sleeve with a notch at one end, a connecting portion at the other end, a connecting slider at the barrier, and a resisting spring that resists the connecting slider in the second liquid guide hole;

[0020] The barrier is used to first fill the hydraulic chamber with hydraulic oil to fix the multiple groups of hinged rods of the well wall support device to each other, and then the connecting part extends the support pipeline to connect the expansion pipeline and the support pipeline, so as to inject oil into the hydraulic telescopic pipe to extend the contact plate to complete the support.

[0021] Furthermore, one end of the barrier member having a notch extends into the hydraulic cavity, and a reset block is provided in the hydraulic cavity;

[0022] The reset block is used to push the connecting portion of the blocking member to extend into the support pipeline to connect the expansion pipeline and the support pipeline when the hydraulic connecting rod moves away from the hinge seat due to oil pumping, so as to pump oil from the hydraulic telescopic tube to reset and retract the contact plate.

[0023] Furthermore, a limiting sliding groove corresponding to the connecting slider is opened on the inner side of the second liquid guiding hole, and the resisting spring is arranged in the limiting sliding groove.

[0024] Furthermore, a sealing valve is provided at one end of the piston rod away from the hinge seat, and the piston rod is connected to the hydraulic equipment through the sealing valve.

[0025] Furthermore, the piston rod is provided with a pressure sensor, and the number of the pressure sensors is two groups;

[0026] The two groups of pressure sensors are used to detect the internal pressure of the expansion pipeline and the support pipeline respectively.

[0027] Furthermore, a fixing panel for fixing a contact plate is provided at the output end of the hydraulic telescopic tube, and the contact plate is fixedly connected to the fixing panel by bolts.

[0028] Furthermore, the connecting member and the fastening member are hingedly connected via connecting bolts.

[0029] A construction method for a shaft support device comprises the following steps:

[0030] S1. Measuring: measuring the target wellbore diameter to obtain the wellbore perimeter information, and then obtaining the required number of wellbore support devices according to the perimeter information;

[0031] S2, pre-assembly, pre-assembly all the well wall support devices into a circle with a diameter smaller than the well wall through the connecting piece 21 and the fastening piece 22, and install a fixed contact plate 6 on the hydraulic telescopic tube 5;

[0032] S3, installation, setting a liquid supply pipe for the spliced ​​well wall support device, and then lifting the spliced ​​well wall support device to the place where support is required in the well by a lifting device;

[0033] S4, expansion, supplying liquid to the expansion pipeline 42 and the support pipeline 43 inside the piston rod 4 through the hydraulic device and the liquid supply pipe, so that a mutually conflicting annular structure is formed between the hinged rods 2 of each well wall support device, and then the hydraulic telescopic tube 5 pushes the fixed contact plate 6 to contact the well wall to form support;

[0034] S5. Re-inspection: After the well wall support device forms a stable support for the well wall, remove the lifting device, and obtain the pressure on the well wall support device through the pressure sensor, and monitor the well wall in real time based on the value.

[0035] The beneficial effects of the present invention are embodied in:

[0036] According to the present invention, when the equipment is in use, a plurality of groups of the well wall support devices can be connected by connecting parts and snap-fit ​​parts to be arranged in a ring around the well wall. Then, the piston rod is connected to the hydraulic equipment to increase the internal pressure of the hydraulic adjustment part, so that a mutually resisting ring structure is formed between the various support devices. As the internal pressure of the hydraulic adjustment part continues to increase, the hydraulic telescopic tube can be pushed to make the resistance plate contact with the well wall, thereby supporting the well wall. The above structure has good adaptability and can be adapted to usage scenarios of different diameters. At the same time, the construction period is short and the support effect is strong, which effectively improves the operation safety, reduces the support cost, and improves the overall operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1A three-dimensional view of the present invention;

[0038] Figure 2 It is a schematic diagram of the implementation of the present invention;

[0039] Figure 3 is a cross-sectional view of the present invention;

[0040] Figure 4 is a cross-sectional view of a piston rod of the present invention;

[0041] Figure 5 It is a schematic diagram of the barrier structure of the present invention.

[0042] In the figure:

[0043] 1. Articulated seat;

[0044] 2. hinged rod; 21. connecting piece; 22. buckle piece; 23. adjusting slide groove;

[0045] 3. Hydraulic connecting rod; 31. Hydraulic adjustment unit; 311. Hydraulic chamber; 312. Reset block;

[0046] 4. Piston rod; 41. Sealing sheet; 42. Extension pipeline; 421. First liquid guide hole; 43. Support pipeline; 431. Second liquid guide hole; 44. Blocking member; 441. Connecting part; 442. Connecting slider; 443. Resistance spring; 45. Reset nut;

[0047] 5. Hydraulic telescopic tube;

[0048] 6. Resistance plate. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0050] See also Figure 1-5 The present invention discloses a shaft support device, comprising:

[0051] Articulated seat 1;

[0052] Articulated rods 2, the number of the articulated rods 2 being two groups and being movably arranged on both sides of the articulated seat 1, the end of one group of articulated rods 2 being provided with a connecting piece 21, the end of the other group of articulated rods 2 being provided with a buckle piece 22 adapted to the connecting piece 21, and both groups of articulated rods 2 being provided with an adjusting slot 23;

[0053] A hydraulic connecting rod 3, wherein the hydraulic connecting rod 3 is movably arranged between the two groups of the hinge rods 2, and an adjusting bayonet 32 ​​adapted to the adjusting slide groove 23 is arranged at both ends of the hydraulic connecting rod 3, and a hydraulic adjusting portion 31 is arranged in the center of the hydraulic connecting rod 3;

[0054] A piston rod 4, wherein the piston rod 4 is fixedly connected to the articulated seat 1 and penetrates the hydraulic adjustment portion 31 and is slidably and sealedly connected to the hydraulic adjustment portion 31, and the piston rod 4 is used to provide hydraulic oil to the hydraulic adjustment portion 31 to adjust the position of the hydraulic connecting rod 3, so as to adjust the opening and closing angle of the articulated rod 2;

[0055] A hydraulic telescopic tube 5, which is arranged on the hinge seat 1 and is connected to the piston rod 4;

[0056] A contact plate 6, which is arranged at the output end of the hydraulic telescopic tube 5 and is used to contact the well wall;

[0057] A plurality of groups of the shaft wall supporting devices are connected by connecting members 21 and buckling members 22 to be arranged in a ring shape around the shaft wall to support the shaft wall.

[0058] Through the above-mentioned structural arrangement, when the equipment is in use, multiple groups of the well wall support devices can be connected through the connecting parts 21 and the snap-fit ​​parts 22 to be arranged in a ring around the well wall. Then, by connecting the piston rod 4 to the hydraulic equipment, the internal pressure of the hydraulic adjustment part 31 is increased, so that a mutually resisting ring structure is formed between the various support devices. As the internal pressure of the hydraulic adjustment part 31 continues to increase, the hydraulic telescopic tube 5 can also be pushed to make the resistance plate 6 contact with the well wall, thereby supporting the well wall. The above-mentioned structure has good adaptability and can be adapted to usage scenarios of different diameters. At the same time, the construction period is short and the support effect is strong, which effectively improves the operation safety, reduces the support cost, and improves the overall operation efficiency.

[0059] It should be supplemented that a sealing sheet 41 is provided at a section of the piston rod 4 located inside the hydraulic adjustment part 31;

[0060] The hydraulic adjustment part 31 is provided with a hydraulic cavity 311 corresponding to the sealing sheet 41. It should be noted that an air cavity is provided on the other side of the hydraulic adjustment part 31 relative to the sealing sheet 41. An air supply hole is provided between the air cavity and the outside to prevent the air inside the hydraulic cavity 311 from being squeezed when the hydraulic cavity 311 is extended or contracted.

[0061] The piston rod 4 is provided with an expansion pipeline 42 and a support pipeline 43;

[0062] The piston rod 4 is provided with a first liquid guide hole 421 and a second liquid guide hole 431 for connecting the expansion pipeline 42 and the support pipeline 43 to the hydraulic chamber 311 respectively;

[0063] When the piston rod 4 supplies fluid, it is used to push the hydraulic connecting rod 3 to move close to the hinge seat 1 and drive the hydraulic telescopic tube 5 to operate so that the contact plate 6 contacts the well wall.

[0064] Furthermore, in order to achieve the purpose of first making the hinged rods 2 of each support device abut against each other to form a complete closed loop, and then making the abutment plate 6 contact the well wall to form support, a blocking member 44 is provided inside the second liquid guide hole 431, and the blocking member 44 is used to block the second liquid guide hole 431;

[0065] The barrier 44 is a sleeve with a notch at one end, a connecting portion 441 at the other end, a connecting slider 442 at the barrier 44, and a resisting spring 443 that resists the connecting slider 442 at the second liquid guide hole 431;

[0066] The barrier 44 is used to first fill the hydraulic chamber 311 with hydraulic oil to fix the multiple groups of hinged rods 2 of the well wall support device to each other, and then the connecting part 441 extends to the outside of the second liquid guide hole 431 to connect the expansion pipeline 42 and the support pipeline 43, so as to inject oil into the hydraulic telescopic tube 5 to extend the contact plate 6 to complete the support.

[0067] With the above-mentioned structural arrangement, when the equipment is in use, the hydraulic oil inside the expansion pipeline 42 first fills the hydraulic chamber 311, and pushes the hydraulic connecting rod 3 to move close to the hinge seat 1, so that the two groups of hinged rods 2 expand, so that the hinged rods 2 of each support device abut against each other to form a complete closed loop, and then continuously supplies oil to the hydraulic chamber 311. Since the hinged rods 2 of each support device abut against each other, the hydraulic connecting rod 3 cannot move, causing the internal space of the hydraulic chamber 311 to remain unchanged, so that the internal pressure continues to increase until the pressure is greater than the elastic force of the resistance spring 443 in the barrier 44. At this time, the barrier 44 is pushed, and the connecting portion 441 extends to the outside of the second liquid guide hole 431 to connect the expansion pipeline 42 and the support pipeline 43. In this process, the hydraulic oil fills the hydraulic telescopic tube 5 with oil to extend the resistance plate 6 to complete the support.

[0068] It should be noted that the end of the barrier 44 with the notch extends to the outside of the second liquid guide hole 431, and a reset block 312 is provided in the hydraulic cavity 311;

[0069] The reset block 312 is used to push the connecting portion 441 of the blocking member 44 to extend into the support pipeline 43 to connect the expansion pipeline 42 and the support pipeline 43 when the hydraulic connecting rod 3 moves away from the hinge seat 1, so as to pump oil from the hydraulic telescopic tube 5 to reset and retract the contact plate 6.

[0070] Through the above-mentioned structural setting, in order to prevent the subsequent resistance plate 6 from being unable to retract normally, the present application can discharge the hydraulic oil in the hydraulic chamber 311 through the expansion pipeline 42, and then move the hydraulic connecting rod 3 away from the hinge seat 1. During the movement, the reset block 312 can resist the barrier 44 and retract, thereby connecting the expansion pipeline 42 and the support pipeline 43, so as to facilitate the subsequent extraction of the hydraulic oil in the hydraulic telescopic tube 5, so that the resistance plate 6 can be reset and retracted.

[0071] It is easy to imagine that a limiting sliding groove corresponding to the connecting slider 442 is opened on the inner side of the second liquid guiding hole 431, and the resisting spring 443 is arranged in the limiting sliding groove.

[0072] It should be further explained that a reset nut is sleeved on the piston rod 4 away from the articulated seat 1, which is not shown in the figure. A threaded groove corresponding to the reset nut is provided on the outer surface of the piston rod 4. The reset nut is rotatably connected to the hydraulic connecting rod 3. Through the setting of the reset nut, the equipment can discharge the hydraulic oil in the hydraulic chamber 311. When the reset nut is rotated, the thread will pull the hydraulic connecting rod 3 away from the articulated seat 1, so that the reset block 312 can retract against the barrier 44.

[0073] In the present application, it is easy to imagine that a sealing valve is provided at one end of the piston rod 4 away from the hinge seat 1, and the piston rod 4 is connected to the hydraulic equipment through the sealing valve.

[0074] It should be noted that the piston rod 4 is provided with a pressure sensor, and the number of the pressure sensors is two groups;

[0075] The two groups of pressure sensors are used to detect the internal pressure of the expansion pipeline 42 and the support pipeline 43 respectively.

[0076] Through the above-mentioned structural setting, the equipment can implement monitoring support devices according to the changes in the pressure sensor value, and can realize real-time monitoring and intelligent adjustment of the well wall status through integrated sensors and intelligent algorithms, thereby improving the accuracy and efficiency of support.

[0077] It should be noted that a fixing panel for fixing the abutment plate 6 is provided at the output end of the hydraulic telescopic tube 5 , and the abutment plate 6 is fixedly connected to the fixing panel by bolts.

[0078] Finally, it is easy to think that the connecting member 21 and the fastening member 22 are hingedly connected by connecting bolts. The above connection structure is a common technical means used by those skilled in the art, so it is not explained and described in detail.

[0079] Another technical solution that needs to be explained in this application is:

[0080] A construction method for a shaft support device comprises the following steps:

[0081] S1. Measuring: measuring the target wellbore diameter to obtain the wellbore perimeter information, and then obtaining the required number of wellbore support devices according to the perimeter information;

[0082] S2, pre-assembly, pre-assembly all the well wall support devices into a circle with a diameter smaller than the well wall through the connecting piece 21 and the fastening piece 22, and install a fixed contact plate 6 on the hydraulic telescopic tube 5;

[0083] S3, installation, setting a liquid supply pipe for the spliced ​​well wall support device, and then hoisting the spliced ​​well wall support device to the place where support is required in the well by a hoisting device;

[0084] S4, expansion, supplying liquid to the expansion pipeline 42 and the support pipeline 43 inside the piston rod 4 through the hydraulic device and the liquid supply pipe, so that a mutually conflicting annular structure is formed between the hinged rods 2 of each well wall support device, and then the hydraulic telescopic tube 5 pushes the fixed contact plate 6 to contact the well wall to form support;

[0085] S5. Re-inspection: After the well wall support device forms a stable support for the well wall, remove the lifting device, and obtain the pressure on the well wall support device through the pressure sensor, and monitor the well wall in real time based on the value.

[0086] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0087] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0088] In addition, "plurality" means two or more.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shaft support device, characterized in that: include: Articulated seat (1); Articulated rods (2), the articulated rods (2) being in two groups and movably arranged on both sides of the articulated seat (1), the ends of one group of articulated rods (2) being provided with connecting pieces (21), the ends of the other group of articulated rods (2) being provided with fastening pieces (22) matched with the connecting pieces (21), and both groups of articulated rods (2) being provided with adjusting slide grooves (23); A hydraulic connecting rod (3), the hydraulic connecting rod (3) being movably arranged between the two groups of hinged rods (2), the two ends of the hydraulic connecting rod (3) being provided with adjustment pins (32) adapted to the adjustment slide groove (23), and the center of the hydraulic connecting rod (3) being provided with a hydraulic adjustment portion (31); A piston rod (4), the piston rod (4) being fixedly connected to the hinge seat (1) and penetrating the hydraulic adjustment portion (31) and being slidably sealedly connected to the hydraulic adjustment portion (31), the piston rod (4) being used to provide hydraulic oil to the hydraulic adjustment portion (31) to adjust the position of the hydraulic connecting rod (3) so as to adjust the opening and closing angle of the hinge rod (2); A hydraulic telescopic tube (5), wherein the hydraulic telescopic tube (5) is arranged on the hinge seat (1) and is in communication with the piston rod (4); A contact plate (6), the contact plate (6) being arranged at the output end of the hydraulic telescopic tube (5) and being used for contacting the well wall; A plurality of groups of the well wall support devices are connected via connecting pieces (21) and buckling pieces (22) to be arranged in a ring shape around the well wall, so as to support the well wall.

2. The shaft support device according to claim 1, characterized in that: A sealing sheet (41) is provided at a section of the piston rod (4) located inside the hydraulic adjustment portion (31); The hydraulic adjustment portion (31) is provided with a hydraulic cavity (311) corresponding to the sealing sheet (41); An expansion pipeline (42) and a support pipeline (43) are arranged in the piston rod (4); The piston rod (4) is provided with a first liquid guide hole (421) and a second liquid guide hole (431) for respectively connecting the expansion pipeline (42) and the support pipeline (43) to the hydraulic chamber (311); When the piston rod (4) supplies fluid, it is used to push the hydraulic connecting rod (3) to move closer to the hinge seat (1) and drive the hydraulic telescopic tube (5) to operate so that the contact plate (6) contacts the well wall.

3. The shaft support device according to claim 2, characterized in that: A blocking member (44) is disposed inside the second liquid guiding hole (431), and the blocking member (44) is used to block the second liquid guiding hole (431); The barrier (44) is a sleeve with a notch at one end, a connecting portion (441) is provided at the other end of the barrier (44), a connecting slider (442) is provided on the barrier (44), and a resisting spring (443) that resists the connecting slider (442) is provided in the second liquid guide hole (431); The blocking member (44) is used to first fill the hydraulic chamber (311) with hydraulic oil to fix the plurality of articulated rods (2) of the well wall support device to each other, and then the connecting portion (441) extends into the support pipeline (43) to connect the expansion pipeline (42) and the support pipeline (43), so as to inject oil into the hydraulic telescopic tube (5) to extend the contact plate (6) to complete the support.

4. The shaft support device according to claim 3, characterized in that: One end of the blocking member (44) having a notch extends into the hydraulic cavity (311), and a reset block (312) is provided in the hydraulic cavity (311); The reset block (312) is used to push the connecting portion (441) of the blocking member (44) to extend into the support pipeline (43) to connect the expansion pipeline (42) and the support pipeline (43) when the hydraulic connecting rod (3) is moved away from the hinge seat (1) by pumping oil, so as to pump oil from the hydraulic telescopic tube (5) to reset and retract the contact plate (6).

5. The shaft support device according to claim 3, characterized in that: A limiting sliding groove corresponding to the connecting slider (442) is provided on the inner side of the second liquid guiding hole (431), and the resisting spring (443) is arranged in the limiting sliding groove.

6. The shaft support device according to claim 1, characterized in that: A sealing valve is provided at one end of the piston rod (4) away from the hinge seat (1), and the piston rod (4) is connected to the hydraulic equipment via the sealing valve.

7. The shaft support device according to claim 1, characterized in that: The piston rod (4) is provided with a pressure sensor, and the number of the pressure sensors is two groups; The two groups of pressure sensors are used to detect the internal pressure of the expansion pipeline (42) and the support pipeline (43) respectively.

8. The shaft support device according to claim 1, characterized in that: The output end of the hydraulic telescopic tube (5) is provided with a fixing panel for fixing the abutment plate (6), and the abutment plate (6) is fixedly connected to the fixing panel by means of bolts.

9. The shaft support device according to claim 1, characterized in that: The connecting piece (21) and the buckling piece (22) are hingedly connected via connecting bolts.

10. The construction method of the shaft wall support device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Measuring: measuring the target wellbore diameter to obtain the wellbore perimeter information, and then obtaining the required number of wellbore support devices according to the perimeter information; S2, pre-assembly, pre-assembly of all the well wall support devices into a circle with a diameter smaller than the well wall by means of a connecting piece (21) and a fastening piece (22), and installation of a fixed contact plate (6) on the hydraulic telescopic tube (5); S3, installation, setting a liquid supply pipe for the spliced ​​well wall support device, and then lifting the spliced ​​well wall support device to the place where support is required in the well by a lifting device; S4, expansion, supplying fluid to the expansion pipeline (42) and the support pipeline (43) inside the piston rod (4) through the hydraulic device and the fluid supply pipe, so that a mutually abutting annular structure is formed between the hinged rods (2) of each well wall support device, and then the hydraulic expansion and contraction pipe (5) pushes the fixed abutment plate (6) to abut against the well wall to form support; S5. Re-inspection: After the well wall support device forms a stable support for the well wall, remove the lifting device, and obtain the pressure on the well wall support device through the pressure sensor, and monitor the well wall in real time based on the value.

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