Anti-twist subsea chuck

Abstract

The application discloses an anti-torsion type seabed chuck and relates to the technical field of marine drilling equipment. The anti-torsion type seabed chuck comprises a hydraulic drive clamping mechanism, a frame in a trapezoidal hexahedron structure and with a bottom side plate, and two hydraulic drive auger type foot support mechanisms symmetrically installed at the bottom of the frame. The clamping mechanism is cross-shaped and is provided with two clamping mechanisms, each of which comprises a liquid cylinder, a pipe body, a jaw plate seat horizontally and oppositely driven in the pipe body by the liquid cylinder, and a jaw plate assembly one-to-one corresponding installed on the inner side of the jaw plate seat and provided with a double-V-shaped opening. The pipe bodies of the two clamping mechanisms are connected, and the lower end of the pipe body of the lower clamping mechanism is connected to the center position of the upper surface of the bottom of the frame. The application greatly improves the anti-torque effect when applied to deep sea drilling, effectively avoids the damage of the marine riser matched with the drill rod, greatly improves the drilling effect and efficiency of the drill rod, and can be adapted to various specifications of the drill rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of marine drilling equipment, in particular to an anti-torsion subsea chuck. BACKGROUND

[0002] In the process of marine drilling, especially deep-sea drilling, a riser is generally needed, which mainly functions to isolate seawater, form a circulation channel for drilling fluid, and then establish a channel for the drill rod to enter the formation. However, in deep-sea drilling, the ship body cannot be fixed on the deep sea, although it can be positioned and stabilized by a propeller cooperating with a GPS system, but the ship body will still be affected by wind and waves, causing it to rock. At this time, even if a traditional subsea drilling device such as a guide rod is used to drill into the seabed to centralize the drill rod, since the subsea drilling device does not have anti-torsion capability and cannot accommodate multiple specifications of drill rods, if the gap is relatively large, it still cannot avoid large rocking, which ultimately still causes the drill rod to be unable to be drilled straight into the seabed or causes damage to the riser, resulting in safety problems and economic losses in exploration.

[0003] Chinese Patent CN112282672A discloses a hydraulic clamp for a drilling machine, which proposes "including a clamping frame, at least two groups of oppositely arranged hydraulic clamping parts are arranged on the clamping frame, the structure of each group of hydraulic clamping parts includes a hydraulic cylinder body, a piston, a limiting sealing plate and a slip seat for installing slips, one end of the piston is in sliding fit with the inner wall of the hydraulic cylinder body, the other end is in elastic connection with the slip seat, the hydraulic cylinder body is provided with a first oil inlet and a second oil inlet, the hydraulic oil entering the first oil inlet acts on one end of the piston, for reversely pushing the hydraulic cylinder body to move, the hydraulic oil entering the second oil inlet acts on the slip seat, for positively pushing the slip to move".

[0004] Although the existing technology provides a hydraulic cylinder body to automatically compensate for the wear of the slips while clamping the drill rod, thereby achieving automatic centering to some extent, the compensation in the existing technology is only fine-tuning compensation, which is still difficult to compensate for the rocking of the drill rod caused by the rocking of the ship body when applied to deep-sea drilling, so that the overall anti-torque effect is still general, the riser cooperating with the drill rod is still prone to damage, and the final drilling efficiency and effect of the drill rod are still general. At the same time, the existing technology still has the technical problem that it cannot accommodate multiple specifications of drill rods, and the applicability is also general.

[0005] Therefore, a new technical solution is needed to solve the above technical problems.

[0006] The present application provides an anti-torsion subsea chuck. SUMMARY

[0007] The anti-torsion type seabed chuck aims to solve the technical problems of the current hydraulic drive clamping device for drill pipes, which has general anti-torque effect, is easy to damage the riser matched with the drill pipe, has general drill pipe drilling efficiency and effect, and cannot match various specifications of drill pipes.

[0008] To achieve the above object, the present application adopts the following technical scheme:

[0009] The anti-torsion type seabed chuck comprises a pulley lifting mechanism, a hydraulic drive clamping mechanism, a frame in a trapezoidal hexahedral structure and with a bottom side plate, and two hydraulic drive auger type foot support mechanisms symmetrically installed at the bottom of the frame, the clamping mechanism is cross-shaped and comprises two parts, each part comprises a hydraulic cylinder, a pipe body, a jaw plate seat horizontally driven by the hydraulic cylinder inside the pipe body, and a jaw plate assembly corresponding to the jaw plate seat and arranged in a double V-shaped opening, the pipe bodies of the two clamping mechanisms are connected, the upper end of the pipe body of the upper clamping mechanism is connected with a horn-shaped guide mechanism, and the lower end of the pipe body of the lower clamping mechanism is connected to the center position of the upper surface of the bottom of the frame.

[0010] Further, the longitudinal section of the frame is in a trapezoidal structure with narrow top and wide bottom, the frame comprises a square structure with top cover and bottom plate horizontally parallel, the top cover is arranged in a hollow manner, and a support square tube is fixed between the lower surface of the top cover and the upper surface of the bottom plate at four corners, respectively, the bottom plate is fixed with a hole bottom side plate arranged downward at the outer periphery of the four edges, a boss flange is fixed at the center position of the upper surface of the bottom plate, an energy accumulator is arranged on the position close to the boss flange on the upper surface of the bottom plate, and a hole lifting plate is fixed at the intermediate position of the lower surface of the four edges of the top cover.

[0011] Further, the pulley lifting mechanism comprises two vertical pulley sets and a horizontal pulley set in a right triangle distribution, the two vertical pulley sets are fixed on the upper surface of the top cover, the top of each vertical pulley set is provided with a steel cable guide sleeve, the horizontal pulley set is fixed on the upper surface of the top cover and located in the middle position between the two vertical pulley sets, the auger type foot support mechanism comprises a cylindrical foot support, an auger drill bit arranged inside the cylindrical foot support, and a hydraulic motor for driving the auger drill bit, the hydraulic motor is installed on the top of the cylindrical foot support, the auger drill bit comprises a cylindrical drill string and an auger spirally wound on the outside of the drill string, the head of the drill string extends out of the cylindrical foot support and forms a tapered tip, the outer diameter of the part of the auger located outside the cylindrical foot support is greater than the outer diameter of the part of the auger located inside the cylindrical foot support, a torsion-resistant pin shaft is fixed radially on the cylindrical foot support, two cylinders are fixed symmetrically on the upper surface of the bottom plate with the boss flange as the center, a through slot is formed in each cylinder and a flange hole is formed at the upper end of each cylinder, the torsion-resistant pin shaft is inserted and connected to the through slot one by one, each pipe body comprises a hollow cylindrical body, the upper and lower ends of the body are respectively formed with an upper flange and a lower flange, the lower flange of the upper pipe body is connected with the upper flange of the lower pipe body, the lower flange of the lower pipe body is connected with the boss flange, the horn-shaped guide mechanism comprises a hollow horn-shaped guide port and a hollow cylindrical guide column vertically penetrating through the top cover, the lower end of the guide port is formed with a first guide flange, the upper and lower ends of the guide column are respectively formed with a second guide flange and a third guide flange, the first guide flange is connected with the second guide flange, and the third guide flange is connected with the upper flange of the upper pipe body;

[0012] Further, the body is also provided with two symmetrical through holes for two jaw plate seats, two guiding plates are symmetrically fixed on the outer side of each through hole, an installation plate is vertically fixed on the upper end of the upper guiding plate and the lower end of the lower guiding plate, a cover plate is detachably installed on the outer side of the two installation plates, the jaw plate seat is T-shaped and includes two symmetrically arranged T-shaped plates, two sliding blocks are symmetrically fixed on the upper surface of the upper T-shaped plate and the lower surface of the lower T-shaped plate, the two sliding blocks of the upper T-shaped plate are respectively slid on the left and right sides of the upper guiding plate, the two sliding blocks of the lower T-shaped plate are respectively slid on the left and right sides of the lower guiding plate, a reinforcing rib plate is fixed between the two T-shaped plates, a jaw plate fixing plate is fixed on the end of the reinforcing rib plate close to the through hole, the jaw plate assembly includes a jaw plate which is detachably installed on the inner side of the corresponding jaw plate fixing plate, the opening of the jaw plate is double-V-shaped and corresponds to four tooth plate grooves which are symmetrically distributed, a tooth plate is embedded in each tooth plate groove, the liquid cylinder of each clamping mechanism is symmetrically provided with two, and each liquid cylinder is connected between the upper and lower T-shaped plates of the corresponding two jaw plate seats through the same side circular reinforcing plate.

[0013] Compared with the prior art, the beneficial effects of the present application are:

[0014] 1. The invention is that the clamping mechanism is driven by hydraulic pressure, and the clamping mechanism is composed of hydraulic cylinder, pipe body, jaw plate seat driven by hydraulic cylinder inside the pipe body horizontally opposite slide, and one-to-one corresponding detachable installation inside the jaw plate seat, at the same time, by setting two clamping mechanisms and crossing the two clamping mechanisms in a cross shape, and connecting the pipe bodies of the two clamping mechanisms, and connecting the lower end of the pipe body of the lower clamping mechanism to the center position of the upper surface of the bottom of the frame, the two clamping mechanisms are superimposed from different angles, so that the drill rod is constrained in the front and rear direction of the clamping mechanism, and also constrained in the left and right direction of the clamping mechanism, so as to realize the bidirectional positioning and clamping of the drill rod, avoid the shaking of the drill rod caused by the influence of offshore waves or tidal current, and preliminarily improve the torsional effect of the chuck when applied to deep sea drilling, on this basis, the frame with trapezoidal hexahedral structure and bottom side plate, and the two hydraulic driven auger type foot support mechanisms symmetrically installed at the bottom of the frame are cooperatively arranged, the bottom side plate of the frame is embedded in the mud due to the large weight of the chuck when placed on the surface of the seabed, and the auger type foot support mechanism is embedded in the deep mud during hydraulic driving operation, and the installation position is far away from the center position, so that the combination of the bottom side plate of the frame and the two auger type foot support mechanisms can withstand high torque, further greatly improving the torsional effect of the chuck when applied to deep sea drilling, and finally effectively avoiding the damage of the riser cooperating with the drill rod, greatly improving the drilling effect and efficiency of the drill rod, at the same time, the double V-shaped setting at the opening of the jaw plate assembly can be tangent to circles of different sizes, so that the jaw plate assembly can adapt to drill rods of multiple specifications, greatly improving the applicability of the chuck, in addition, the stroke of the hydraulic cylinder is also large, which can meet the stroke supplement of drill rods of different specifications, further improving the applicability of the chuck;

[0015] 2. The horn-shaped guide mechanism in the invention is composed of a hollow horn-shaped guide port and a hollow cylindrical guide column, the lower end of the guide port and the upper end of the guide column are connected through the first guide flange and the second guide flange, and the lower end of the guide column is connected with the upper flange of the upper pipe body through the third guide flange, so that the horn-shaped guide mechanism can guide when the drill rod is lowered, thereby further improving the drilling effect and efficiency of the drill rod;

[0016] 3. The jaw plate opening in the application is in a double V-shaped structure, and four left-right symmetrical tooth plate grooves are formed correspondingly, and tooth plates are embedded in the tooth plate grooves. In theory, a common V-shaped structure can be tangent to all circles as long as the extension line of the V-shaped structure is long enough, so that small specification drill pipes are relatively easy to adapt, while large specification drill pipes may not be adapted due to the insufficient length of the extension line, and the design of two V-shaped structures in the application can make up for the defect of insufficient length of the extension line of large specification drill pipes, so that large specification drill pipes can be adapted, that is, when small specification drill pipes are used, the two inner tooth plates are used for clamping, and when large specification drill pipes are used, the two outer tooth plates are used for clamping;

[0017] 4. The auger type foot support mechanism in the application is composed of a cylindrical foot support, an auger drill bit arranged in the cylindrical foot support, and a hydraulic motor for driving the auger drill bit, and a torsion-resistant pin shaft is fixed radially on the cylindrical foot support. In the application, the cylindrical surface on the upper surface of the bottom plate is connected and matched with the torsion-resistant pin shaft, so that the installation of the auger type foot support mechanism is realized, and the torsional moment effect brought by the auger type foot support mechanism is further improved.

[0018] 5. In the application, the cooperation of the two vertical pulley blocks and the horizontal pulley block distributed in a right triangle and the steel cable guide sleeve at the top of the two vertical pulley blocks makes the cable of the steel cable winch used to hoist the chuck on the seabed can bear the weight at the diagonal and is not easy to slip off, effectively ensuring the stability and safety of the chuck hoisting, and further ensuring the drilling effect and efficiency of the drill pipe. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of the application;

[0020] Figure 2 It is a top view schematic diagram of the application;

[0021] Figure 3 It is an axial side view of the application;

[0022] Figure 4 It is an axial side view of the frame of the application;

[0023] Figure 5 It is a sectional view of the auger type foot support mechanism of the application;

[0024] Figure 6 It is an axial side view of the horn-shaped guide mechanism of the application

[0025] Figure 7 It is an axial side view of the clamping mechanism of the application;

[0026] Figure 8 It is a top view schematic diagram of the clamping mechanism of the application;

[0027] Figure 9Fig. 1 is a schematic view of the front view of the clamping mechanism of the present application;

[0028] Figure 10 Fig. 2 is a schematic view of the axial view of the pipe body of the present application;

[0029] Figure 11 Fig. 3 is a schematic view of the structure of the jaw plate seat of the present application;

[0030] Figure 12 Fig. 4 is a schematic view of the working principle of the jaw plate seat of the present application;

[0031] Figure 13 Fig. 5 is a schematic view of the structure of the jaw plate of the present application;

[0032] Figure 14 Fig. 6 is a schematic view of the working principle of the jaw plate of the present application;

[0033] In the figure: 1, vertical pulley block, 2, horizontal pulley block, 3, steel cable guide sleeve, 4, frame, 41, bottom side plate, 42, top cover, 43, bottom plate, 44, support square tube, 45, lifting plate, 46, boss flange, 47, cylinder, 471, through slot, 472, flange hole, 5, hydraulic cylinder, 6, pipe body, 61, body, 62, upper flange, 63, lower flange, 64, through hole, 65, guide plate, 66, mounting plate, 7, jaw plate seat, 71, T-shaped plate, 711, circular ring reinforcing plate, 712, draw pin, 72, sliding block, 73, reinforcing rib plate, 74, jaw plate fixing plate, 8, jaw plate, 81, jaw slot, 9, jaw, 10, guide port, 101, first guide flange, 11, guide column, 111, second guide flange, 112, third guide flange, 12, energy accumulator, 13, cylindrical prop, 131, anti-torsion pin shaft, 14, auger drill bit, 141, drill string, 142, conical tip, 143, auger, 15, hydraulic motor, 16, cover plate. DETAILED DESCRIPTION

[0034] The following examples are used to further illustrate the content of the present application, and do not limit the application of the present application.

[0035] Please refer to Figures 1-14It shows a kind of anti-torsion type seabed chuck, including frame 4 in trapezoidal hexahedron structure, and two clamping mechanisms in cross-shaped cross arrangement, the longitudinal section of frame 4 is trapezoidal with narrow top and wide bottom, and includes top cover 42, bottom plate 43, support square tube 44, boss flange 46, cylinder 47 and hoisting plate 45 with hole, top cover 42 and bottom plate 43 are both square structure and arranged horizontally and parallelly, top cover 42 is hollow, support square tube 44 is provided with four and welded between the lower surface of four corners of top cover 42 and the upper surface of four corners of bottom plate 43, the outer periphery of four sides of bottom plate 43 is welded with downward arranged bottom side plate 41 with hole, hoisting plate 45 is provided with four and welded in the middle position of the lower surface of four sides of top cover 42, boss flange 46 is welded in the center position of the upper surface of bottom plate 43, cylinder 47 is provided with two and symmetrically welded in the upper surface of bottom plate 43 with boss flange 46 as center (at this time, a plurality of round holes are correspondingly provided on the upper surface of bottom plate 43 and welded with boss flange 46 and cylinder 47), through slot 471 is formed on the upper end of cylinder 47 and flange hole 472 is formed on the upper end, accumulator 12 is also arranged on the position of the upper surface of bottom plate 43 close to boss flange 46;

[0036] Further, pulley lifting mechanism is welded on the upper surface of top cover 42 (the function and structure of the conventional equipment such as existing pulley lifting mechanism commonly equipped with steel cable winch are well known in the art, and the connection setting is also well known, so it is not described here, and it is not shown in the drawings), pulley lifting mechanism is composed of two vertical pulley groups 1 in right triangle distribution and one horizontal pulley group 2, horizontal pulley group 2 is located in the middle position of two vertical pulley groups 1, two vertical pulley groups 1 are arranged on the opposite corners of the upper surface of top cover 42, and the top of two vertical pulley groups 1 is provided with steel cable guide sleeve 3, auger type support mechanism is correspondingly installed on the lower side of cylinder 47, auger type support mechanism is composed of cylindrical foot prop 13, auger drill bit 14 and hydraulic motor 15 (the function and structure of the conventional equipment such as existing hydraulic motor commonly equipped with control mechanism are well known in the art, and the connection setting is also well known, so it is not described here, and it is not shown in the drawings), hydraulic motor 15 is installed on the top of cylindrical foot prop 13, auger drill bit 14 is coaxially arranged in the inside of cylindrical foot prop 13 and is drivingly connected with hydraulic motor 15 at the top, auger drill bit 14 is composed of cylindrical drill string 141 and auger 143 wound on the outside of drill string 141, the head of drill string 141 extends out of cylindrical foot prop 13 and forms tapered tip 142, the outer diameter of the part of auger 143 in cylindrical foot prop 13 is smaller than the outer diameter of the part of auger 143 out of cylindrical foot prop 13 (the design of the outer diameter of auger 143 can make cylindrical foot prop 13 automatically fall into the hole of seabed after excavation), anti-torsion pin shaft 131 is radially inserted and welded on the through slot 471 of corresponding cylinder 47 on the cylindrical foot prop 13;

[0037] Further, the clamping mechanisms each include a pipe body 6, two liquid cylinders 5 arranged symmetrically left and right, a jaw plate seat 7 driven by the liquid cylinders 5 to slide horizontally inside the pipe body 6, and a jaw plate assembly fixed by bolts to the inner side of the jaw plate seat 7 (the functions and structures of the conventional control mechanisms and other conventional devices commonly provided with the liquid cylinders are known in the art, and the connection settings are also common knowledge, so they are not described here and are not shown in the drawings), the pipe body 6 includes a hollow cylindrical body 61, and an upper flange 62 and a lower flange 63 formed respectively at the upper and lower ends of the body 61, the lower flange 63 of the upper pipe body 6 is connected with the upper flange 62 of the lower pipe body, and the lower flange 63 of the lower pipe body 6 is connected with the boss flange 46, the jaw plate seat 7 is in T-shaped structure and penetrates the through hole 64 one by one, the jaw plate seat 7 includes two T-shaped plates 71 arranged symmetrically and horizontally, the lower surface of the upper T-shaped plate 71 and the upper surface of the lower T-shaped plate 71 are symmetrically welded with a circular reinforcing plate 711 at both ends, each liquid cylinder 5 is connected by the same side circular reinforcing plate 711 between the upper and lower T-shaped plates 71 of the corresponding two jaw plate seats 7 (corresponding to the draw pin 712), the body 61 is also provided with a square through hole 64 symmetrically in front and back, the outer side of each through hole 64 is symmetrically welded with two guide plates 65, at the same time, the upper surface of the upper T-shaped plate 71 and the lower surface of the lower T-shaped plate 71 are symmetrically welded with two sliding blocks 72, the two sliding blocks 72 of the upper T-shaped plate 71 slide on the left and right sides of the upper guide plate 65 under the drive of the liquid cylinder 5, the two sliding blocks 72 of the lower T-shaped plate 71 slide on the left and right sides of the lower guide plate 65 under the drive of the liquid cylinder 5, the upper surface of the upper guide plate 65 and the lower surface of the lower guide plate 65 are perpendicularly welded with a mounting plate 66 at one end away from the through hole 64, the outer sides of the upper and lower mounting plates 66 are bolted with a cover plate 16, wherein a reinforcing rib plate 73 is welded at the middle position between the upper and lower T-shaped plates 71, the reinforcing rib plate 73 is welded with a jaw plate fixing plate 74 at one end close to the through hole 64, the jaw plate assembly includes a jaw plate 8 with a double-V-shaped structure at the opening, the jaw plate 8 is bolted to the inner side of the jaw plate fixing plate 74 and corresponds to form four tooth plate grooves 81 distributed symmetrically left and right (at this time, the jaw plate 8 and the jaw plate fixing plate 74 are provided with threaded holes correspondingly), and the tooth plate 9 is embedded in the tooth plate groove 81 one by one;

[0038] Further, the upper flange 62 of the upper pipe body is connected with a horn-shaped guide mechanism, the horn-shaped guide mechanism is composed of a guide port 10 and a guide column 11, the guide port 10 is in a hollow horn shape and a first guide flange 101 is formed at the lower end, the guide column 11 is in a hollow cylindrical shape and a third guide flange 112 is formed at the lower end and connected with the upper flange 62 of the upper pipe body, the upper end of the guide column 11 vertically penetrates the top cover 42 and a second guide flange 111 is formed and connected with the first guide flange 101 (at this time, the side wall of the guide column 11 is provided with a plurality of apertures, which are used to avoid back pressure when the drill pipe is lowered, and the drill pipe cannot be lowered).

[0039] The working principle and working process of the present application are as follows:

[0040] When working, first, the sea floor chuck is suspended on the seabed by the pulley lifting mechanism using a conventional steel cable winch; then, the two hydraulic motors 15 of the auger type foot support mechanism are driven to operate simultaneously, driving the auger drill bit 14 to rotate, thereby causing the cylindrical foot support 13 to be inserted into the interior of the seabed; then, the hydraulic motor 15 is closed, and the drill pipe starts to be lowered under the guidance of the horn-shaped guide mechanism, and when the drill pipe stops, the hydraulic cylinder 5 of the clamping mechanism drives the two jaw plate seats 7 to slide relative to each other to achieve automatic centering, and the jaw plate 8 on the jaw plate 9 is clamped, so that the drill pipe is stable (at this time, the top drive or power tong back tong can also be used for up-torque); finally, the sea floor chuck is recovered by the steel cable winch (at this time, the lifting plate 45 of the frame 4 can cooperate to lift the sea floor chuck). During this process, when the hydraulic motor 15 drives the auger drill bit 14 to rotate, the mud will be discharged from the upper part of the auger drill bit 14, and the reaction force of the mud can insert the cylindrical foot support 13 into the interior of the seabed.

[0041] In addition, the accumulator 12 serves as power compensation for deep sea operations, and the two vertical pulley blocks 1 of the pulley lifting mechanism are arranged diagonally on the frame 4, so that the cable of the steel cable winch can bear the weight at the diagonal position without passing through the center hole position, and the existence of the steel cable guide sleeve 3 makes the cable not easy to slip off.

Claims

1. A torsion-resistant subsea chuck comprising a hydraulically driven clamping mechanism, characterised in that, The frame is in trapezoidal hexahedral structure and has a bottom side plate, and two hydraulic driving auger type foot prop mechanisms are symmetrically mounted at the bottom of the frame, the clamping mechanisms are cross-shaped and each includes a hydraulic cylinder, a pipe body, a jaw plate seat horizontally and oppositely driven by the hydraulic cylinder in the pipe body, and a jaw plate assembly symmetrically mounted on the inner side of the jaw plate seat and having a double V-shaped opening, the pipe bodies of the two clamping mechanisms are connected, and the lower end of the pipe body of the lower clamping mechanism is connected to the upper surface center of the bottom of the frame. The jaw plate seat is in T-shaped structure and includes two T-shaped plates symmetrically and horizontally arranged, the upper surface of the upper T-shaped plate and the lower surface of the lower T-shaped plate are fixed with two sliders symmetrically left and right, the two sliders of the upper T-shaped plate are slid on the left and right sides of the upper guide plate, and the two sliders of the lower T-shaped plate are slid on the left and right sides of the lower guide plate. The middle position between the two T-shaped plates is fixed with a reinforcing rib plate, one end of the reinforcing rib plate close to the through hole is fixed with a jaw plate fixing plate, the jaw plate assembly includes a jaw plate detachably mounted on the inner side of the corresponding jaw plate fixing plate, the opening of the jaw plate is in double V-shaped structure and corresponds to four tooth plate grooves symmetrically distributed left and right, and the tooth plate grooves are embedded with tooth plates. The hydraulic cylinder of each clamping mechanism is symmetrically provided with two, the lower surface of the upper T-shaped plate and the upper surface of the lower T-shaped plate of each jaw plate seat are fixed with circular ring reinforcing plates symmetrically at the left and right ends, and each hydraulic cylinder is connected between the upper and lower T-shaped plates of the corresponding two jaw plate seats through the circular ring reinforcing plates on the same side.

2. A torsion-resistant subsea chuck according to claim 1, wherein, The longitudinal section of the frame is in trapezoidal structure with narrow top and wide bottom, the frame includes a top cover and a bottom plate in square structure and horizontally parallel, the top cover is in hollow structure and fixed with a support square tube between the lower surface of the top cover and the upper surface of the bottom plate, the bottom plate is fixed with a bottom side plate with holes downward at the outer periphery of the four edges, and the bottom plate is fixed with a lifting plate with holes at the middle position of the lower surface of the four edges.

3. A torsion-resistant subsea chuck according to claim 2, wherein The bottom plate is fixed with a boss flange at the center of the upper surface, the pipe body includes a body in hollow cylindrical structure, the upper and lower ends of the body are formed with an upper flange and a lower flange, the lower flange of the upper pipe body is connected with the upper flange of the lower pipe body, the lower flange of the lower pipe body is connected with the boss flange, the body is further provided with a through hole for the two jaw plate seats to pass through, the outer side of each through hole is fixed with two guide plates horizontally and symmetrically at the upper and lower ends, the upper surface of the upper guide plate and the lower surface of the lower guide plate are fixed with mounting plates vertically at the end away from the through hole, and the outer sides of the upper and lower mounting plates are detachably mounted with a cover plate.

4. A torsion-resistant subsea chuck according to claim 3, wherein, The horn-shaped guide mechanism comprises a hollow horn-shaped guide port and a hollow cylindrical guide column vertically penetrating the top cover, a first guide flange is formed at the lower end of the guide port, a second guide flange and a third guide flange are respectively formed at the upper and lower ends of the guide column, the first guide flange is connected with the second guide flange, and the third guide flange is connected with the upper flange of the upper tube.

5. A torsion-resistant subsea chuck according to claim 3, wherein, The chuck further comprises an accumulator arranged on the upper surface of the bottom plate near the boss flange.

6. A torsion-resistant subsea chuck according to claim 2, wherein, The auger type foot support mechanism comprises a cylindrical foot support, an auger drill bit arranged inside the cylindrical foot support, and a hydraulic motor for driving the auger drill bit, the hydraulic motor is installed on the top of the cylindrical foot support, the auger drill bit comprises a cylindrical drill column and an auger spirally arranged outside the drill column, the head of the drill column extends out of the cylindrical foot support and forms a tapered tip, the outer diameter of the part of the auger outside the cylindrical foot support is larger than that of the part of the auger inside the cylindrical foot support, a torsion-resistant pin shaft is fixed radially on the cylindrical foot support, two cylinders are fixed symmetrically on the upper surface of the bottom plate with the boss flange as the center, a through slot is formed in each cylinder and a flange hole is formed at the upper end of each cylinder, and the torsion-resistant pin shaft is one-to-one correspondingly inserted and connected to the through slot.

7. A torsion-resistant subsea chuck according to claim 2, wherein, The chuck further comprises a pulley lifting mechanism, the pulley lifting mechanism comprises two vertical pulley blocks and one horizontal pulley block arranged in a right-angled triangle, the two vertical pulley blocks are fixed to the opposite corners of the upper surface of the top cover and each is provided with a steel cable guide sleeve at the top, and the horizontal pulley block is fixed to the upper surface of the top cover and located at the middle position between the two vertical pulley blocks.

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