Wall support device and method of construction thereof

Abstract

The application discloses a well wall supporting device and a construction method thereof, which comprises a hinged seat, two groups of hinged rods movably arranged on the two sides of the hinged seat, a connecting piece arranged at the end of one group of the hinged rods, a buckling piece adapted to the connecting piece arranged at the end of the other group of the hinged rods, and an adjusting sliding groove arranged on each of the two groups of the hinged rods. When the device is used, the connecting piece and the buckling piece are used to connect the two groups of the well wall supporting devices to be arranged in a ring shape around the well wall, then a hydraulic device is connected to the piston rod, the internal pressure of the hydraulic adjusting part is increased, a mutual resisting ring structure is formed between the supporting devices, the resisting plate is in contact with the well wall by driving the hydraulic telescopic pipe as the internal pressure of the hydraulic adjusting part continuously increases, and the well wall is supported. The above structure has good adaptability, can be adapted to different diameter use scenes, and effectively improves the overall operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of support structure technology, and in particular to a wellbore support device and its construction method. Background Technology

[0002] In oil and gas field development, mineral resource exploration, and underground engineering construction, wellbore support is one of the key technologies for ensuring operational safety and preventing formation collapse and wellbore instability. Traditional wellbore support methods, such as grouting reinforcement and steel pipe support, can meet support requirements to a certain extent, but they suffer from problems such as long construction cycles, high costs, and limited support effectiveness. Especially under complex geological conditions, such as soft rock formations and fractured zones, traditional support methods often fail to achieve ideal support results.

[0003] Therefore, developing new, efficient, and reliable wellbore support devices is of great significance for improving operational safety, reducing support costs, and enhancing overall operational efficiency. Thus, a wellbore support device and its construction method are proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings by providing a wellbore support device that achieves efficient and reliable wellbore support.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a wellbore support device, comprising:

[0006] Hinge mount;

[0007] The hinge rods are arranged in two sets and are movably disposed on both sides of the hinge seat. One set of the hinge rods is provided with a connector at its end, and the other set of the hinge rods is provided with a fastener adapted to the connector at its end. Both sets of the hinge rods are provided with an adjustment groove.

[0008] A hydraulic connecting rod is movably disposed between two sets of hinged rods. The two ends of the hydraulic connecting rod are provided with adjusting pins that are adapted to the adjusting slide groove. A hydraulic adjusting part is provided in the middle of the hydraulic connecting rod.

[0009] The piston rod is fixedly connected to the hinge seat and slidably sealed 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 and adjust the opening angle of the hinge rod.

[0010] A hydraulic telescopic tube, wherein the hydraulic telescopic tube is disposed on the hinge seat and communicates with the piston rod;

[0011] A contact plate is provided at the output end of the hydraulic telescopic pipe to contact the well wall;

[0012] Multiple sets of well wall support devices are connected by connectors and fasteners to form a ring around the well wall for supporting the well wall.

[0013] Furthermore, a sealing plate is provided on a section of the piston rod located inside the hydraulic adjustment unit;

[0014] The hydraulic adjustment section is provided with a hydraulic chamber corresponding to the sealing plate;

[0015] The piston rod is equipped with an expansion pipe and a support pipe.

[0016] The piston rod is provided with a first liquid guiding hole and a second liquid guiding hole, so that the expansion pipeline and the support pipeline are respectively connected to the hydraulic chamber;

[0017] When the piston rod is supplied with fluid, it is used to push the hydraulic connecting rod closer to the hinge seat and drive the hydraulic telescopic pipe to make the contact plate contact the well wall.

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

[0019] The barrier is a sleeve with a notch at one end and a connecting part at the other end. A connecting slider is provided on the barrier, and an abutting spring that abuts against the connecting slider is provided in the second liquid guiding hole.

[0020] The barrier is used to first fill the hydraulic chamber with hydraulic oil so that the hinge rods of the multiple sets of well wall support devices are fixed to each other, and then the connecting part extends into the support pipeline to conduct 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 with 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 part of the barrier to extend the support pipe into the expansion pipe and the support pipe when the hydraulic connecting rod moves away from the hinge seat by pumping oil, so as to pump oil into the hydraulic telescopic pipe to reset and retract the contact plate.

[0023] Furthermore, a limiting groove corresponding to the connecting slider is provided on the inner side of the second liquid guiding hole, and the abutment spring is disposed in the limiting groove.

[0024] Furthermore, a sealing valve is provided at the 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 equipped with a pressure sensor, and the number of pressure sensors is two sets;

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

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

[0028] Furthermore, the connector and the fastening member are hinged together by connecting bolts.

[0029] A construction method for a wellbore support device includes the following steps:

[0030] S1. Measurement: Measure the diameter of the target well wall to obtain the well wall perimeter information, and then determine the required number of well wall support devices based on the perimeter information.

[0031] S2. Pre-assembly: All well wall support devices are pre-assembled into a circle with a diameter smaller than that of the well wall by means of connector 21 and fastener 22, and a fixed contact plate 6 is installed on the hydraulic telescopic pipe 5.

[0032] S3. Installation: Install a fluid supply pipe on the assembled well wall support device, and then use a hoisting device to hoist the assembled well wall support device to the location that needs support downhole.

[0033] S4. Expansion: Through the hydraulic device and the supply pipe, liquid is supplied to the expansion pipe 42 and the support pipe 43 inside the piston rod 4, so that the hinge rods 2 of each well wall support device form a mutually abutting ring structure. Then the hydraulic telescopic pipe 5 pushes the fixed abutting plate 6 to abut against the well wall to form support.

[0034] S5. Re-inspection: After the well wall support device provides stable support to the well wall, disassemble the hoisting 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 this invention are reflected in:

[0036] In this invention, multiple sets of well wall support devices are connected in a ring around the well wall via connectors and fasteners. Then, by connecting a piston rod to a hydraulic device, the internal pressure of the hydraulic regulating unit is increased, causing the various support devices to form a mutually abutting ring structure. As the internal pressure of the hydraulic regulating unit continues to rise, it can also push the hydraulic telescopic pipe to bring the abutting plate into contact with the well wall, thereby supporting the well wall. This structure has good adaptability and can be adapted to different diameter application scenarios. It also features a short construction period, strong support effect, effectively improving operational safety, reducing support costs, and increasing overall operational efficiency. Attached Figure Description

[0037] Figure 1This is a perspective view of the present invention;

[0038] Figure 2 This is a schematic diagram illustrating an embodiment of the present invention;

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

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

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

[0042] In the picture:

[0043] 1. Hinge mount;

[0044] 2. Hinge rod; 21. Connector; 22. Fastener; 23. Adjusting slide;

[0045] 3. Hydraulic connecting rod; 31. Hydraulic adjusting part; 311. Hydraulic chamber; 312. Reset block;

[0046] 4. Piston rod; 41. Sealing plate; 42. Expansion pipe; 421. First liquid guide hole; 43. Support pipe; 431. Second liquid guide hole; 44. Barrier; 441. Connecting part; 442. Connecting slider; 443. Abutment spring; 45. Reset nut;

[0047] 5. Hydraulic telescopic pipe;

[0048] 6. Contact plate. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Please see Figure 1-5 This invention discloses a wellbore support device, comprising:

[0051] Hinge base 1;

[0052] The hinge rod 2 is provided in two sets and is movably disposed on both sides of the hinge seat 1. One set of the hinge rod 2 is provided with a connector 21 at its end, and the other set of the hinge rod 2 is provided with a fastener 22 that is adapted to the connector 21 at its end. Both sets of the hinge rod 2 are provided with an adjustment groove 23.

[0053] A hydraulic connecting rod 3 is movably disposed between the two sets of hinge rods 2. The two ends of the hydraulic connecting rod 3 are provided with adjusting pins 32 that are adapted to the adjusting slide groove 23. A hydraulic adjusting part 31 is provided in the middle of the hydraulic connecting rod 3.

[0054] Piston rod 4 is fixedly connected to hinge seat 1 and passes through hydraulic adjustment part 31 and is slidably sealed to hydraulic adjustment part 31. Piston rod 4 is used to provide hydraulic oil to hydraulic adjustment part 31 to adjust the position of hydraulic connecting rod 3 and adjust the opening angle of hinge rod 2.

[0055] Hydraulic telescopic tube 5, which is disposed on the hinge seat 1 and communicates with the piston rod 4;

[0056] A contact plate 6 is provided at the output end of the hydraulic telescopic pipe 5 to contact the well wall;

[0057] Multiple sets of well wall support devices are connected by connectors 21 and fasteners 22 to form a ring around the well wall for supporting the well wall.

[0058] With the above-described structure, during equipment use, multiple sets of well wall support devices can be connected by connectors 21 and fasteners 22 to form a ring around the well wall. Then, by connecting the piston rod 4 to the hydraulic equipment, the internal pressure of the hydraulic regulating unit 31 is increased, so that the various support devices form a mutually abutting ring structure. As the internal pressure of the hydraulic regulating unit 31 continues to rise, the hydraulic telescopic pipe 5 can be pushed to make the contact plate 6 contact the well wall, thereby achieving support for the well wall. The above structure has good adaptability and can be adapted to different diameter application scenarios. At the same time, the construction cycle is short, the support effect is strong, and it effectively improves the safety of operation, reduces the support cost, and improves the overall operation efficiency.

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

[0060] The hydraulic adjustment unit 31 is provided with a hydraulic chamber 311 corresponding to the sealing plate 41. It should be noted that an air chamber is provided on the other side of the hydraulic adjustment unit 31 relative to the sealing plate 41. An air supply hole is provided between the air chamber and the outside, so as to prevent the air inside the hydraulic chamber 311 from being squeezed when it extends and retracts.

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

[0062] The piston rod 4 is provided with a first liquid guiding hole 421 and a second liquid guiding hole 431, so that the expansion pipe 42 and the support pipe 43 are respectively connected to the hydraulic chamber 311;

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

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

[0065] The barrier 44 is a sleeve with a notch at one end, and the other end of the barrier 44 is provided with a connecting part 441. A connecting slider 442 is provided on the barrier 44, and an abutting spring 443 that abuts against the connecting slider 442 is provided in the second liquid guiding hole 431.

[0066] The barrier 44 is used to first fill the hydraulic chamber 311 with hydraulic oil so that the hinge rods 2 of the multiple sets of well wall support devices are fixed to each other. Then the connecting part 441 extends to the outside of the second guide hole 431 to conduct the expansion pipe 42 and the support pipe 43, so as to inject oil into the hydraulic telescopic pipe 5 so that the contact plate 6 extends to complete the support.

[0067] With the above structural setup, when the equipment is in use, the hydraulic oil inside the expansion pipe 42 first fills the hydraulic chamber 311 and pushes the hydraulic connecting rod 3 closer to the hinge seat 1, causing the two sets of hinge rods 2 to expand, so that the hinge rods 2 of each support device abut against each other to form a complete closed loop. Then, oil is continuously supplied into the hydraulic chamber 311. Since the hinge rods 2 of each support device abut against each other, the hydraulic connecting rod 3 cannot move, so the internal space of the hydraulic chamber 311 remains unchanged, causing its internal pressure to continuously increase until the pressure exceeds the elastic force of the abutment spring 443 in the barrier 44. At this time, the barrier 44 is pushed, and the connecting part 441 extends to the outside of the second guide hole 431 to conduct the expansion pipe 42 and the support pipe 43. During this process, the hydraulic oil injects oil into the hydraulic telescopic pipe 5 to extend the abutment plate 6 to complete the support.

[0068] It should be noted that the notched end of the barrier 44 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 part 441 of the blocking member 44 to extend into the support pipe 43 to conduct the expansion pipe 42 and the support pipe 43 when the hydraulic connecting rod 3 moves away from the hinge seat 1, so as to pump oil from the hydraulic telescopic pipe 5 to reset and retract the contact plate 6.

[0070] With the above structural design, in order to prevent the contact plate 6 from failing to retract properly, this application can discharge the hydraulic oil inside the hydraulic chamber 311 through the expansion pipe 42, and then move the hydraulic connecting rod 3 away from the hinge seat 1. During the movement, the reset block 312 can retract by contacting the blocking member 44, thereby connecting the expansion pipe 42 and the support pipe 43, so as to facilitate the subsequent extraction of hydraulic oil inside the hydraulic telescopic pipe 5, so that the contact plate 6 can be reset and retracted.

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

[0072] It should be further noted that a reset nut is fitted on the piston rod 4 away from the hinge seat 1 (not shown in the figure). The outer surface of the piston rod 4 is provided with a threaded groove corresponding to the reset nut. The reset nut is rotatably connected to the hydraulic connecting rod 3. With the reset nut, after the hydraulic oil inside the hydraulic chamber 311 is discharged, when the reset nut is rotated, the thread will pull the hydraulic connecting rod 3 away from the hinge seat 1, so that the reset block 312 can retract against the blocking member 44.

[0073] In this application, it is readily apparent that a sealing valve is provided at the 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 a pressure sensor is provided on the piston rod 4, and there are two sets of pressure sensors.

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

[0076] With the above-mentioned structural setup, the equipment can monitor the support device based on changes in pressure sensor values. Furthermore, by integrating sensors and intelligent algorithms, it can achieve real-time monitoring and intelligent adjustment of the wellbore condition, thereby improving the accuracy and efficiency of the support.

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

[0078] Finally, it is easy to see that the connector 21 and the fastening member 22 are hinged together by connecting bolts. The above connection structure is a common technical means used by those skilled in the art, so it has not been described in detail.

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

[0080] A construction method for a wellbore support device includes the following steps:

[0081] S1. Measurement: Measure the diameter of the target well wall to obtain the well wall perimeter information, and then determine the required number of well wall support devices based on the perimeter information.

[0082] S2. Pre-assembly: All well wall support devices are pre-assembled into a circle with a diameter smaller than that of the well wall by means of connector 21 and fastener 22, and a fixed contact plate 6 is installed on the hydraulic telescopic pipe 5.

[0083] S3. Installation: Install a fluid supply pipe on the assembled well wall support device, and then use a hoisting device to hoist the assembled well wall support device to the location that needs support downhole.

[0084] S4. Expansion: Through the hydraulic device and the supply pipe, liquid is supplied to the expansion pipe 42 and the support pipe 43 inside the piston rod 4, so that the hinge rods 2 of each well wall support device form a mutually abutting ring structure. Then the hydraulic telescopic pipe 5 pushes the fixed abutting plate 6 to abut against the well wall to form support.

[0085] S5. Re-inspection: After the well wall support device provides stable support to the well wall, disassemble the hoisting 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 indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0087] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0088] Additionally, "multiple" refers to 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wall support device, characterized in that The utility model provides a kind of well wall support device, including: Hinged seat (1); Hinged rod (2), the hinged rod (2) is two groups and movably arranged in the two sides of hinged seat (1), the end of one group of the hinged rod (2) is provided with connecting piece (21), the end of another group of the hinged rod (2) is provided with the fastening piece (22) matched with connecting piece (21), adjusting sliding slot (23) is set on two groups of the hinged rod (2); Hydraulic connecting rod (3), the hydraulic connecting rod (3) is movably arranged between two groups of the hinged rod (2), and the two ends of the hydraulic connecting rod (3) are provided with adjusting pin (32) matched with adjusting sliding slot (23), and the hydraulic connecting rod (3) is provided with hydraulic adjusting part (31) in the middle; Piston rod (4), the piston rod (4) is fixedly connected with hinged seat (1) and penetrates hydraulic adjusting part (31) simultaneously with hydraulic adjusting part (31) sliding seal connection, and the piston rod (4) is used to provide hydraulic oil for hydraulic adjusting part (31) to adjust the position of hydraulic connecting rod (3), to adjust the hinged rod (2) opening and closing angle; Hydraulic telescopic pipe (5), the hydraulic telescopic pipe (5) is arranged on hinged seat (1) and is communicated with piston rod (4); Resist plate (6), the resist plate (6) is arranged on the output end of hydraulic telescopic pipe (5) to contact with well wall; Multiple groups of the well wall support device are connected by connecting piece (21) and fastening piece (22) to be arranged annularly around well wall to support well wall; The section of the piston rod (4) in the interior of hydraulic adjusting part (31) is provided with sealing sheet (41); The hydraulic adjusting part (31) is provided with hydraulic cavity (311) corresponding to sealing sheet (41) in it; The piston rod (4) is provided with extension pipeline (42) and support pipeline (43) in it; The piston rod (4) is provided with first liquid guide hole (421) and second liquid guide hole (431) to make extension pipeline (42) and support pipeline (43) communicate with hydraulic cavity (311) respectively; The piston rod (4) is used to push hydraulic connecting rod (3) to move close to hinged seat (1) and drive hydraulic telescopic pipe (5) to run when supplying liquid to make resist plate (6) contact with well wall; The second liquid guide hole (431) is provided with barrier piece (44) in it, and the barrier piece (44) is used to block second liquid guide hole (431); The barrier piece (44) is sleeve with notch arranged at one end, and the other end of the barrier piece (44) is provided with communication part (441), and the barrier piece (44) is provided with connecting sliding block (442), and the second liquid guide hole (431) is provided with resist spring (443) abutting with connecting sliding block (442) in it; The barrier piece (44) is used to fill hydraulic oil in the interior of hydraulic cavity (311) first to make the hinged rod (2) of multiple groups of the well wall support device be fixed mutually, and then communication part (441) extends to support pipeline (43) to guide extension pipeline (42) and support pipeline (43) to inject oil to hydraulic telescopic pipe (5) to make resist plate (6) extend to complete support.

2. The wall support device of claim 1, wherein: The barrier (44) has one end with a notch extending into a hydraulic cavity (311) in which a reset block (312) is arranged; The reset block (312) is used to push the communication part (441) of the barrier (44) to extend into the support pipeline (43) to guide the extension pipeline (42) and the support pipeline (43) when the oil extraction makes the hydraulic connecting rod (3) move away from the hinged seat (1), so as to reset the contact plate (6) by the oil extraction of the hydraulic telescopic pipe (5).

3. A wall support device according to claim 2, characterised in that: A limiting sliding groove corresponding to the connecting sliding block (442) is arranged on the inner side of the second liquid guide hole (431), and the contact spring (443) is arranged in the limiting sliding groove.

4. The wall support device of claim 1, wherein: A sealing valve is arranged at one end of the piston rod (4) away from the hinged seat (1), and the piston rod (4) is connected to the hydraulic equipment through the sealing valve.

5. The wall support device of claim 1, wherein: A pressure sensor is arranged on the piston rod (4), and the number of the pressure sensor is two groups. The two groups of pressure sensors are respectively used to detect the internal pressure of the extension pipeline (42) and the support pipeline (43).

6. The wall support device of claim 1, wherein: A fixing panel for fixing the contact plate (6) is arranged at the output end of the hydraulic telescopic pipe (5), and the contact plate (6) is fixedly connected with the fixing panel through bolts.

7. The wall support device of claim 1, wherein: The connecting piece (21) and the buckling piece (22) are hinged through connecting bolts.

8. A method of installing a wall protection device according to any one of claims 1 to 7, characterised in that, The method comprises the following steps: S1, measuring, measuring the well wall diameter to obtain well wall circumference information, and then obtaining the number of well wall support devices required according to the circumference information; S2, pre-splicing, pre-splicing all well wall support devices into a circular shape with a diameter smaller than the well wall through the connecting piece (21) and the buckling piece (22), and installing the fixed contact plate (6) on the hydraulic telescopic pipe (5); S3, installation, providing a liquid supply pipe for the spliced well wall support device, and then hoisting the spliced well wall support device to the position to be supported in the well through a hoisting device; S4, expansion, supplying liquid to the extension pipeline (42) and the support pipeline (43) in the piston rod (4) through the hydraulic device and the liquid supply pipe, so that the hinged rods (2) of each well wall support device form a mutual contact annular structure, and then the hydraulic telescopic pipe (5) pushes the fixed contact plate (6) to contact the well wall to form support; S5, re-inspection, after the well wall support device forms stable support on the well wall, the hoisting device is removed, the pressure borne by the well wall support device is obtained through the pressure sensor, and the well wall is monitored in real time according to the feedback value of the pressure sensor.

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