Limit buffer device for backhaul operation

Abstract

The present application relates to the technical field of oil and gas development, and discloses a limit buffer device for towing back operation, which includes a fixed part, a sliding part, a limit part and a buffer part; the fixed part is suitable for connecting with a barge and supported under the sliding part; the sliding part is suitable for connecting with a drilling rig, and the sliding part and the fixed part are slidably connected along the towing back direction of the drilling rig; the limit part is suitable for connecting with a barge and is located at the front end of the sliding part; the buffer part is located between the sliding part and the limit part, and the buffer part is configured to buffer the impulse of the sliding part moving toward the limit part. The limit buffer device for towing back operation provided by the present application can effectively avoid reducing the excessive instantaneous pulling force of the drilling rig.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas development, and in particular to a limit buffer device for a pull-back operation. Background Art

[0002] As a construction technology for landing marine pipelines, offshore directional drilling plays a role in protecting the coastline topography. During the construction process, after drilling and reaming, the pipeline needs to be towed back. Before towing the pipeline back, first connect the pipeline to the reaming tool or center locator, and then start the towing back operation. The drilling rig drives the drill rod to rotate and retreat, and then tow back the reaming.

[0003] In the related art, a marine barge is generally used for towing operations, the towing drilling rig is rigidly connected to the barge, and a pulling force for towing is applied to the drill pipe.

[0004] In the process of implementing this application, the inventors found that the related technology has at least the following problems:

[0005] The barge will be affected by various factors such as wind, waves, and currents at sea, causing irregular movements. This irregular movement can cause excessive instantaneous pulling force on the drilling rig. Summary of the invention

[0006] In view of this, the present application provides a limit buffer device for backhaul operation, which can effectively avoid excessive instantaneous pulling force of the drilling rig. Specifically, it includes the following technical solutions:

[0007] The embodiment of the present application provides a limit buffer device for a back-pulling operation, the device comprising a fixing portion, a sliding portion, a limit portion and a buffer portion;

[0008] The fixed part is suitable for being connected to the barge and supported below the sliding part;

[0009] The sliding part is suitable for being connected to the drilling rig, and the sliding part and the fixing part are slidably connected along the pulling-back direction of the drilling rig;

[0010] The limiting portion is suitable for being connected to the barge and is located at the front end of the sliding portion;

[0011] The buffer portion is located between the sliding portion and the limiting portion, and is configured to buffer an impulse of the sliding portion moving toward the limiting portion.

[0012] In an implementation of the embodiment of the present application, the buffer portion includes at least one elastic member, and at least one end of the elastic member is connected to the limiting portion or the sliding portion.

[0013] In an implementation manner of the embodiment of the present application, the elastic member is a rubber block, a through hole is provided inside the rubber block, and an axial direction of the through hole is perpendicular to the pull-back direction.

[0014] In one implementation of the embodiment of the present application, the fixing portion includes a bottom plate and two sets of limiting grooves;

[0015] The two groups of limit grooves are located on the bottom plate and arranged side by side perpendicular to the pull-back direction;

[0016] Each group of the limiting grooves includes at least one limiting groove segment, and a plurality of limiting groove segments are arranged at intervals along the pulling-back direction.

[0017] In one implementation of the embodiment of the present application, the limiting groove section includes a first side plate arranged vertically and a second side plate arranged horizontally;

[0018] Two ends of the first side plate are respectively connected to the second side plate and the bottom plate;

[0019] The second side plate is located above the bottom plate and parallel to the bottom plate;

[0020] The first side plate, the second side plate and the bottom plate form a limiting groove facing the sliding part, and at least a portion of the sliding part is located inside the limiting groove.

[0021] In one implementation of the embodiment of the present application, the limiting groove section further includes a first baffle;

[0022] The first baffle is located at the rear end of the limiting groove section, the first baffle is connected to the first side plate and the second side plate, and extends toward the outside of the limiting groove.

[0023] In one implementation of the embodiment of the present application, a second baffle is provided on the outer side of the sliding portion;

[0024] The height of the second baffle plate in the direction perpendicular to the bottom plate is greater than the height of the limiting groove section, and / or the width of the second baffle plate in the direction parallel to the bottom plate is greater than the width of the limiting groove section, so that the second baffle plate and the limiting groove section cooperate to limit the moving distance of the second baffle plate.

[0025] In one implementation of the embodiment of the present application, the front end of the sliding portion has a mounting seat extending perpendicularly to the pull-back direction;

[0026] The mounting seat has at least one pin shaft, and the pin shaft is suitable for being matched and fixed with the ground anchor of the drilling rig.

[0027] In one implementation of the embodiment of the present application, the limiting portion includes a first limiting pile and a first reinforcing pile;

[0028] The first limit pile extends perpendicular to the pull-back direction and is close to the buffer portion;

[0029] The first reinforcement pile extends along the pull-back direction, and the rear end of the first reinforcement pile is connected to the first limit pile.

[0030] In one implementation of the embodiment of the present application, the device further includes a climbing portion;

[0031] The climbing part is suitable for being connected to the barge and is located at the rear end of the sliding part;

[0032] The height of the climbing portion in the vertical direction gradually decreases from front to back to form a slope.

[0033] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:

[0034] The limiting buffer device for towing back operation provided in the embodiment of the present application has a fixed part that can be fixed on the barge, and the drilling rig can be fixed on the sliding part, and the sliding part can slide relative to the fixed part in the towing back direction of the drilling rig, and the sliding distance of the drilling rig is limited by the limiting part located at the front end of the sliding part, and the impulse of the sliding part moving toward the sliding part is buffered by the buffer part between the sliding part and the limiting part, thereby effectively avoiding excessive instantaneous pulling force on the drilling rig caused by the movement of the barge and reducing the risk of damage to the drilling rig. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the top view of a position limiting buffer device provided in an embodiment of the present application is shown;

[0037] Figure 2 A schematic diagram of the installation structure of a position limiting buffer device and a barge provided in an embodiment of the present application is shown;

[0038] Figure 3 A schematic structural diagram of a rubber block provided in an embodiment of the present application is shown;

[0039] Figure 4 Shows Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0040] Figure 5 A side structural schematic diagram of a position limiting buffer device provided in an embodiment of the present application is shown.

[0041] The reference numerals in the figures represent respectively:

[0042] 1. fixing part; 11. bottom plate; 111. first bottom plate; 112. second bottom plate; 12. limiting groove section; 121. first side plate; 122. second side plate; 123. limiting groove; 124. first stop plate;

[0043] 2. Sliding part; 21. Second baffle plate; 22. Mounting seat; 221. Pin shaft; 222. Second reinforcing plate; 23. I-beam column; 231. Upper plate; 232. Lower plate; 233. Support plate; 24. First reinforcing beam;

[0044] 3. Limiting part; 31. First limiting pile; 311. Third reinforcing plate; 32. First reinforcing pile; 321. Fourth reinforcing plate;

[0045] 4. Buffering portion; 41. Through hole; 42. Fixing plate;

[0046] 5. Climbing part; 51. Second limit pile; 52. Second reinforcement pile; 521. Fifth reinforcement plate;

[0047] 6. Barge;

[0048] 7. Drilling rig. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] In order to make the technical solution and advantages of the present application clearer, the structure, function and advantages of the limit buffer device for the back-dragging operation will be described in detail below with reference to the accompanying drawings.

[0051] The limit buffer device for the back-pulling operation provided in the embodiment of the present application is as follows: Figure 1 As shown, the limit buffer device comprises a fixed portion 1, a sliding portion 2, a limit portion 3 and a buffer portion 4. The fixed portion 1 is suitable for being connected to a barge 6 and supported below the sliding portion 2. The sliding portion 2 is suitable for being connected to a drilling rig 7, and the sliding portion 2 and the fixed portion 1 are slidably connected along the towing direction of the drilling rig 7. The limit portion 3 is suitable for being connected to a barge 6 and is located at the front end of the sliding portion 2. The buffer portion 4 is located between the sliding portion 2 and the limit portion 3, and the buffer portion 4 is configured to buffer the impulse of the sliding portion 2 moving toward the sliding portion 2.

[0052] In the embodiment of the present application, Figure 1The bottom-up direction shown (or Figure 2 The left-to-right direction shown in the figure is the front-to-back direction in the embodiment of the present application, and the pulling back direction of the drilling rig 7 can be the front-to-back direction. Figure 1 and Figure 2 It can be seen from the figure that the limiting portion 3, the buffer portion 4 and the sliding portion 2 are arranged in sequence from front to back.

[0053] In traditional pipeline towing operations, the detachable drill pipe on the drilling rig is connected to a universal joint, which is connected to a towing head, which is connected to the submarine pipeline. The drill pipe is disassembled by twisting and pulling back the drilling rig, so that the pipelines are put into the borehole one by one from the land, and finally the pipelines are towed to the designed location.

[0054] During the pipeline towing operation, the drilling rig 7 is rigidly connected to the barge 6. Therefore, when the barge 6 moves backward under the influence of wind, waves, currents and other factors, the instantaneous pulling force of the drilling rig 7 will be too large, damaging the pipeline and drill pipe.

[0055] The limiting buffer device provided in the embodiment of the present application has a fixed part 1 that can be fixed on the barge 6, and the drilling rig 7 can be fixed on the sliding part 2, and the sliding part 2 can slide relative to the fixed part 1 along the towing direction of the drilling rig 7, and the sliding distance of the drilling rig 7 is limited by the limiting part 3 located at the front end of the sliding part 2, and the impulse of the sliding part 2 moving toward the limiting part 3 is buffered by the buffer part 4 between the sliding part 2 and the limiting part 3, thereby effectively avoiding excessive instantaneous pulling force on the drilling rig 7 caused by the movement of the barge 6 and reducing the risk of damage to the drilling rig 7.

[0056] In the present application embodiment, Figure 3 As shown, the buffer portion 4 may include at least one elastic member, and at least one end of the elastic member may be connected to the limiting portion 3 or the sliding portion 2. The elastic member may be at least one of a rubber block or a spring, and the buffer portion 4 includes at least two elastic members arranged in parallel perpendicular to the pull-back direction. Figure 1 In the figure, the elastic member is a rubber block, and two of them are provided as an example.

[0057] Furthermore, the front end of the elastic member can be fixed on the limiting portion 3 , so that the elastic member can be fixed relative to the barge 6 .

[0058] Alternatively, the rear end of the elastic member may be fixed to the sliding portion 2 , so that the elastic member may move along with the sliding portion 2 .

[0059] Alternatively, the two ends of the elastic member may be fixed on the limiting portion 3 and the sliding portion 2 respectively.

[0060] The elastic member can be squeezed when the sliding part 2 slides forward relative to the barge 6 to generate elastic deformation, thereby buffering the impulse of the sliding part 2 moving forward, and gradually recovering when the sliding part 2 moves backward relative to the barge 6.

[0061] In the embodiment of the present application, when the elastic member is a spring, springs with different stiffnesses can be selected according to the magnitude of the impulse of the sliding part 2 moving forward, so as to fully buffer the impulse of the sliding part 2.

[0062] like Figure 3 As shown, when the elastic member is a rubber block, the rubber block may have a through hole 41 inside, and the axial direction of the through hole 41 may be perpendicular to the pull-back direction. By providing the through hole 41 inside the rubber block, the rigidity of the elastic block can be reduced, the deformation capacity of the rubber block can be increased, and thus the buffering capacity of the rubber block can be improved.

[0063] like Figure 2 As shown, the two ends of the rubber block can be fixed on the sliding part 2 and the limiting part 3, respectively. Exemplarily, the limiting part 3 and the sliding part 2 can have a set of fixing plates 42, each set of fixing plates 42 includes two fixing plates 42 arranged in parallel perpendicular to the pull-back direction, and one end of the rubber block can be located between the two fixing plates 42 on the sliding part 2. Correspondingly, the other end of the rubber block can be located between the two fixing plates 42 on the limiting part 3. The two sets of fixing plates 42 extend relative to each other, and the rubber block can be fixed to the two adjacent fixing plates 42 by bolts.

[0064] In the embodiment of the present application, a limit plate may be provided above the elastic member to limit the deformation height of the elastic member in the vertical direction. For example, the limit plate may be a flat metal plate, one end of which may be fixed to the upper end of the sliding part 2 or the limit part 3, and the other end may be overlapped on the limit part 3 or the sliding part 2.

[0065] Alternatively, if Figure 4 As shown, the fixing part 1 may include a bottom plate 11 and two sets of limiting grooves, and the sliding part 2 may be located above the bottom plate 11 and may slide on the bottom plate 11. The bottom plate 11 may be a flat metal plate.

[0066] Two groups of limiting grooves may be located on the bottom plate 11 and arranged side by side perpendicular to the pull-back direction. Each group of limiting grooves may include at least one limiting groove segment 12, and a plurality of limiting groove segments 12 are arranged at intervals along the pull-back direction. In the embodiment of the present application, the distance between two adjacent limiting groove segments 12 may be kept consistent.

[0067] In the present application embodiment, Figure 4As shown, each limiting groove section 12 may include a vertically arranged first side plate 121 and a horizontally arranged second side plate 122. The two ends of the first side plate 121 may be connected to the second side plate 122 and the bottom plate 11 respectively, and the second side plate 122 is located above the bottom plate 11 and parallel to the bottom plate 11. The first side plate 121, the second side plate 122 and the bottom plate 11 may form a limiting groove 123 facing the sliding part 2, and at least a portion of the sliding part 2 may be located inside the limiting groove 123.

[0068] In the embodiment of the present application, the sliding portion 2 may include two I-beam columns 23 arranged in parallel and perpendicular to the pull-back direction, and each I-beam column 23 extends along the pull-back direction.

[0069] Specifically, each I-beam column 23 may include an upper plate 231 and a lower plate 232 arranged in parallel in the vertical direction, wherein the upper plate 231 may be located above the lower plate 232. A support plate 233 may be connected between the upper plate 231 and the lower plate 232, and the support plate 233 may be further connected to the middle of the upper plate 231 and the lower plate 232.

[0070] The widths of the upper plate 231 and the lower plate 232 perpendicular to the pull-back direction may be the same, and the widths of the upper plate 231 and the lower plate 232 may be greater than the width of the support plate 233 perpendicular to the pull-back direction, thereby forming an I-shaped structure.

[0071] In the embodiment of the present application, the side opposite to the two I-beams 23 can be called the inner side of the I-beam 23 , and correspondingly, the side away from the other I-beam 23 can be called the outer side of the I-beam 23 .

[0072] like Figure 4 As shown, a group of limiting grooves may be provided on the outer side of each I-beam column 23 , and the outer side portion of the lower plate 232 of the I-beam column 23 may slide in the limiting groove 123 .

[0073] Correspondingly, the bottom plate 11 may include a first bottom plate 111 and a second bottom plate 112 , and the first bottom plate 111 and the second bottom plate 112 may be respectively located under the two I-beam columns 23 , thereby reducing material usage and saving costs.

[0074] In other embodiments of the present application, the bottom plate 11 may also be a whole metal plate, and both I-beams 23 may slide on the bottom plate 11 .

[0075] Furthermore, the width of the first bottom plate 111 and the second bottom plate 112 perpendicular to the pull-back direction may be slightly larger than the width of the corresponding I-beam column 23 (i.e., the width of the upper plate 231 and the lower plate 232), and there may be a certain distance between the outer edge of the lower plate 232 of each I-beam column 23 and the inner wall of the first side plate 121, so that the sliding part 3 can also move slightly on the bottom plate 11 perpendicular to the pull-back direction.

[0076] In addition, the inner sides of the two I-beam columns 23 may have a first reinforcing beam 24. Both ends of the first reinforcing beam 24 are respectively connected to one I-beam column 23, and the first reinforcing beam 24 may be arranged perpendicular to the two I-beam columns 23 to ensure that the sliding part 2 can move as a whole.

[0077] For example, the first reinforcing beam 24 may also adopt an I-shaped structure to save material usage. The first reinforcing beam 24 and the two I-beam columns 23 may be connected by welding. The two ends of the first reinforcing beam 24 may be connected to the support plates 233 of the two I-beam columns 23, respectively. And the upper surface of the first reinforcing beam 24 may be connected to the lower surface of the upper plate 231, so that the connection strength can be improved by increasing the welding area.

[0078] Alternatively, if Figure 4 As shown, a second baffle plate 21 may be further provided on the outer side of the sliding part 2, and the second baffle plate 21 may be located on the outer side of each I-beam column 23. The second baffle plate 21 may be configured to cooperate with the limiting groove section 12 to limit the sliding distance of the sliding part 2. That is, the moving distance of the sliding part 2 is limited between two adjacent limiting groove sections 12.

[0079] In some embodiments of the present application, the height of the second baffle plate 21 in the direction perpendicular to the bottom plate 11 may be greater than the height of the limiting groove section 12. For example, the second baffle plate 21 may be arranged at the outer edge of the lower plate 232 and extend a certain length upward in the vertical direction, and the extension length may be greater than the height of the vertically arranged first side plate 121. After the sliding portion slides a certain distance between two adjacent limiting groove sections 12, the second baffle plate 21 may be limited by the horizontally arranged second side plate 122.

[0080] Alternatively, the width of the second baffle plate 21 in the direction parallel to the bottom plate 11 may be greater than the width of the limiting groove section 12. For example, the second baffle plate 21 may be arranged at the outer edge of the lower plate 232, and extend outwardly for a certain length perpendicular to the pull-back direction until it extends out to the outer side of the limiting groove section 12. After the sliding portion slides a certain distance between two adjacent limiting groove sections 12, the second baffle plate 21 may be limited by the vertically arranged first side plate 121.

[0081] In the embodiment of the present application, the second baffle plate 21 can satisfy the above two conditions at the same time, that is, the height of the second baffle plate 21 in the direction perpendicular to the bottom plate 11 can be greater than the height of the limiting groove section 12, and the width of the second baffle plate 21 in the direction parallel to the bottom plate 11 can be greater than the width of the limiting groove section 12, so that the second baffle plate 21 and the limiting groove section 12 can cooperate to limit the moving distance of the second baffle plate 21.

[0082] For example, Figure 4As shown, the second baffle plate 21 can be connected between the upper plate 231 and the lower plate 232 of the I-beam column 23, the width of the second baffle plate 21 in the direction parallel to the bottom plate 11 can be equal to the width of the upper plate 231 and the lower plate 232, the height of the second baffle plate 21 in the direction perpendicular to the bottom plate 11 can be equal to the height of the support plate 233, and the second baffle plate 21 can be arranged perpendicular to the support plate 233.

[0083] In this case, the second baffle plate 21 can also improve the strength of the sliding part 2 in the vertical direction to support the drilling rig 7 to move on the sliding part 2 , thereby improving the service life of the sliding part 2 .

[0084] Alternatively, if Figure 4 As shown, in order to reduce the impact strength of the second baffle plate 21 of the sliding part 2 on the limiting groove section 12, the limiting groove section 12 may also include a first baffle plate 124, which is connected to the first side plate 121 and the second side plate 122 and extends to the outside of the limiting groove 123.

[0085] The front and rear ends of the position-limiting slot section 12 may both have the first baffle plate 124. Alternatively, since the instantaneous excessive pulling force of the drilling rig 7 is mainly caused by the easy forward movement of the sliding part 2 relative to the barge 6, and the risk of the sliding part 2 moving backward relative to the barge 6 is relatively small, the first baffle plate 124 may be located only at the rear end of the position-limiting slot section 12 to reduce the impact between the first baffle plate 124 and the position-limiting slot section 12 in front of it when the sliding part 2 moves forward.

[0086] The first baffle plate 124 can be welded with the first side plate 121 and the second side plate 122. The first baffle plate 124 can increase the contact area between the limiting groove section 12 and the second baffle plate 21, thereby reducing the impact strength of the second baffle plate 21 on the limiting groove section 12 and extending the service life of the limiting groove section 12.

[0087] Alternatively, if Figure 1 and 2 As shown, the front end of the sliding part 2 may have a mounting seat 22 extending perpendicular to the back-pulling direction. The mounting seat 22 may have at least one pin 221, which is suitable for cooperating with the anchor of the drilling rig 7 to fix the drilling rig 7 on the sliding part 2.

[0088] In an embodiment of the present application, a second reinforcing plate 222 may be respectively provided between the mounting seat 22 and the two I-beam columns 23, each second reinforcing plate 222 may be located on the outer side of its corresponding I-beam column 23, and the second reinforcing plate 222 may have a certain angle with the I-beam column 23, so that a triangular stable structure can be formed between the second reinforcing plate 222 and the I-beam column 23 and the mounting seat 22.

[0089] Furthermore, since the second reinforcing plate 222 is outside the I-beam 23 and extends relative to the I-beam 23, when the sliding part 2 moves backward, the second reinforcing plate 222 and the limiting groove section 12 at its rear end can cooperate with each other to limit the sliding distance of the sliding part 2.

[0090] Alternatively, if Figure 1 As shown, the limiting portion 3 may include a first limiting pile 31 and a first reinforcing pile 32. The first limiting pile 31 may extend perpendicularly to the pull-back direction and be close to the buffer portion 4. The first reinforcing pile 32 may extend along the pull-back direction, and the rear end of the first reinforcing pile 32 may be connected to the first limiting pile 31.

[0091] In the embodiment of the present application, since the first limit pile 31 needs to bear most of the impact of the sliding part 2, a plurality of third reinforcing plates 311 may be arranged in parallel in the first limit pile 31 perpendicular to the pull-back direction to improve the strength of the first limit pile 31.

[0092] The first reinforcement pile 32 can be arranged similarly to the sliding part 2, and can include two beams arranged in parallel perpendicular to the pull-back direction, each beam extending along the pull-back direction. The beam can also be an I-beam. A fourth reinforcement plate 321 can also be connected between the inner sides of the two beams.

[0093] Alternatively, if Figure 1 and Figure 5 As shown, the position limiting buffer device may further include a climbing portion 5, which may be connected to the barge 6 and located at the rear end of the sliding portion 2, and the height of the climbing portion 5 in the vertical direction may gradually decrease from front to back to form a slope.

[0094] In the embodiment of the present application, the climbing portion 5 may include a second limit pile 51 and a second reinforcement pile 52. The second limit pile 51 may extend perpendicularly to the back-pulling direction and be close to the rear end of the sliding portion 2. The second reinforcement pile 52 may extend along the back-pulling direction, and the front end of the second reinforcement pile 52 may be connected to the second limit pile 51.

[0095] In some embodiments of the present application, the second limiting pile 51 may be an I-beam column, and the second limiting pile 51 may also have a plurality of reinforcing plates arranged in parallel and perpendicular to the pulling-back direction.

[0096] In other embodiments of the present application, considering that the second limit pile 51 is mainly used to limit the distance that the sliding part 2 moves backward relative to the barge 6, but the probability of the sliding part 2 moving backward relative to the barge 6 is relatively small, and when the sliding part 2 moves backward relative to the barge 6, the risk of damage to the drilling rig 7 is also relatively small, it can be considered that the risk and intensity of the impact of the sliding part 2 on the second limit pile 51 are relatively small. In order to save materials and reduce costs, the second limit pile 51 may not be provided with a reinforcement plate.

[0097] The second reinforcement pile 52 may be arranged in a slope shape, and the second reinforcement pile 52 may have a fifth reinforcement plate 521 arranged at intervals along the back-pulling direction. The fifth reinforcement plate 521 may be connected between the upper and lower ends of the second reinforcement pile 52 in the vertical direction to improve the strength of the second reinforcement pile 52 in the vertical direction, thereby supporting the movement of the drilling rig 7 on the climbing portion 5.

[0098] The limiting buffer device provided in the embodiment of the present application has a fixed part 1 that can be fixed on the barge 6, and the drilling rig 7 can be fixed on the sliding part 2, and the sliding part 2 can slide relative to the fixed part 1 along the towing direction of the drilling rig 7, and the sliding distance of the drilling rig 7 is limited by the limiting part 3 located at the front end of the sliding part 2, and the impulse of the sliding part 2 moving toward the sliding part 2 is buffered by the buffer part 4 between the sliding part 2 and the limiting part 3, thereby effectively avoiding the instantaneous pulling force of the drilling rig 7 caused by the movement of the barge 6 and reducing the risk of damage to the drilling rig 7.

[0099] Furthermore, the position limiting buffer device can fix the directional drilling rig on the barge, thereby solving the problem that the land directional drilling rig cannot be used for barge operation, and greatly improving the construction safety. At the same time, compared with the traditional method of using a pipe-laying ship to cooperate with offshore towing construction, the position limiting buffer device provided in the embodiment of the present application fixes the directional drilling rig on the barge, which can greatly reduce the construction cost of land and sea directional drilling.

[0100] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0101] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0102] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A limit buffer device for back-pulling operation, characterized in that: The device comprises a fixing part (1), a sliding part (2), a limiting part (3) and a buffer part (4); The fixed part (1) is suitable for being connected to a barge (6) and is supported below the sliding part (2); The sliding part (2) is suitable for being connected to the drilling rig (7), and the sliding part (2) and the fixing part (1) are slidably connected along the pulling-back direction of the drilling rig (7); The limiting portion (3) is suitable for being connected to the barge (6) and is located at the front end of the sliding portion (2); The buffer portion (4) is located between the sliding portion (2) and the limiting portion (3), and the buffer portion (4) is configured to buffer the impulse of the sliding portion (2) moving toward the limiting portion (3); Wherein, the fixing part (1) comprises a bottom plate (11) and two sets of limiting grooves; The two groups of limiting grooves are located on the bottom plate (11) and are arranged side by side perpendicular to the pulling-back direction; Each group of the limiting grooves comprises at least one limiting groove segment (12), and a plurality of limiting groove segments (12) are arranged at intervals along the pulling-back direction; The limiting groove section (12) comprises a first side plate (121) arranged vertically and a second side plate (122) arranged horizontally; Two ends of the first side plate (121) are respectively connected to the second side plate (122) and the bottom plate (11); The second side plate (122) is located above the bottom plate (11) and is parallel to the bottom plate (11); The first side plate (121), the second side plate (122) and the bottom plate (11) form a limiting groove (123) facing the sliding part (2), and at least a part of the sliding part (2) is located inside the limiting groove (123).

2. The device according to claim 1, characterized in that The buffer portion (4) comprises at least one elastic member, and at least one end of the elastic member is connected to the limiting portion (3) or the sliding portion (2).

3. The device according to claim 2, characterized in that The elastic member is a rubber block, the interior of the rubber block is provided with a through hole (41), and the axial direction of the through hole (41) is perpendicular to the pull-back direction.

4. The device according to claim 1, characterized in that The limiting groove section (12) further includes a first baffle plate (124); The first baffle plate (124) is located at the rear end of the limiting groove section (12), the first baffle plate (124) is connected to the first side plate (121) and the second side plate (122), and extends toward the outside of the limiting groove (123).

5. The device according to any one of claims 1 to 4, characterized in that: A second baffle (21) is provided on the outer side of the sliding portion (2); The height of the second baffle plate (21) in a direction perpendicular to the bottom plate (11) is greater than the height of the limiting groove section (12), and / or the width of the second baffle plate (21) in a direction parallel to the bottom plate (11) is greater than the width of the limiting groove section (12), so that the second baffle plate (21) and the limiting groove section (12) cooperate to limit the moving distance of the second baffle plate (21).

6. The device according to claim 1, characterized in that The front end of the sliding part (2) has a mounting seat (22) extending perpendicularly to the pulling-back direction; The mounting seat (22) has at least one pin shaft (221), and the pin shaft (221) is suitable for being matched and fixed with a ground anchor of the drilling rig (7).

7. The device according to claim 1, characterized in that The limiting portion (3) comprises a first limiting pile (31) and a first reinforcing pile (32); The first limiting pile (31) extends perpendicularly to the pulling-back direction and is close to the buffer portion (4); The first reinforcement pile (32) extends along the pulling-back direction, and the rear end of the first reinforcement pile (32) is connected to the first limiting pile (31).

8. The device according to claim 1, characterized in that The device also includes a climbing portion (5); The climbing part (5) is suitable for being connected to the barge (6) and is located at the rear end of the sliding part (2); The height of the climbing portion (5) in the vertical direction gradually decreases from front to back to form a slope.

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