A top drive system for marine engineering survey and coring drilling

Abstract

The present invention relates to a top drive system for marine engineering survey and coring drilling, comprising: an upper connecting coring assembly, a dual-channel replaceable flushing pipe mechanism, a top drive floating mechanism, a back-up clamp mechanism, a top drive main gearbox mechanism and a lifting ring mechanism; the upper connecting coring assembly is arranged on the top of the dual-channel replaceable flushing pipe mechanism and connected to the top of the dual-channel replaceable flushing pipe mechanism; the bottom of the dual-channel replaceable flushing pipe mechanism is connected to the top of the top drive main gearbox mechanism; the top drive floating mechanism is connected to both sides of the top drive main gearbox mechanism; the back-up clamp mechanism and the lifting ring mechanism are also connected to the top drive main gearbox mechanism; the bottom main shaft of the top drive main gearbox mechanism is connected to a drill pipe. The marine engineering survey and coring drilling top drive system provided by the present invention meets the needs of completing marine engineering survey and coring drilling on existing marine survey ships.

Description

Technical Field

[0001] The invention belongs to the technical field of marine exploration top drive, and in particular relates to a marine engineering survey and coring drilling top drive system. Background Art

[0002] On an offshore engineering survey vessel, the hull space is small, but the drilling top drive system needs to be installed on board; the drilling top drive system is required to have limited space and be lightweight; the current offshore top drive cannot meet the above requirements, so a top drive system that can complete offshore engineering survey coring drilling on board is needed. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the existing technical problems, the present invention provides a top drive system for marine engineering survey and coring drilling, which meets the demand for completing marine engineering survey and coring drilling on existing marine survey vessels.

[0005] (II) Technical solution

[0006] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0007] A top drive system for marine engineering survey and coring drilling, comprising: an upper connection coring assembly, a dual-channel replaceable flushing pipe mechanism, a top drive floating mechanism, a back-up clamp mechanism, a top drive main body gearbox mechanism and a lifting ring mechanism;

[0008] The upper connecting coring assembly is arranged on the top of the dual-channel replaceable flushing tube mechanism and connected to the top of the dual-channel replaceable flushing tube mechanism;

[0009] The bottom of the dual-channel replaceable flushing pipe mechanism is connected to the top of the top drive main body gearbox mechanism;

[0010] The top drive floating mechanism is connected to both sides of the top drive main body gearbox mechanism;

[0011] The top drive main body gearbox mechanism is also connected to the back-up clamp mechanism and the lifting ring mechanism;

[0012] The bottom main shaft of the top drive main body gearbox mechanism is connected to the drill pipe;

[0013] The upper connecting coring assembly can be connected to the main shaft of the top drive main body gearbox mechanism through the dual-channel replaceable flushing pipe mechanism;

[0014] The CPT sampling drill rod can penetrate the main shaft from the top of the upper connection coring assembly and further probe to the bottom of the drill rod to take geological samples under the drill rod.

[0015] Preferably, the upper connection coring assembly comprises: a sampling pipeline, a sampling bell mouth and an electric-controlled ball valve assembly;

[0016] The sampling bell mouth is arranged at the top of the sampling pipe;

[0017] The bottom of the sampling pipeline is connected to the dual-channel replaceable flushing pipe mechanism through a flange;

[0018] The electrically controlled ball valve assembly is arranged inside the sampling pipeline to control the closing or opening of the sampling pipeline.

[0019] Preferably, the dual-channel replaceable flushing pipe mechanism comprises: a flushing pipe support unit, a replaceable upper sealing unit, a replaceable lower sealing unit, a replaceable flushing pipe and gooseneck pipe support unit;

[0020] The bottom of the flushing tube support unit is connected to the top of the top drive main body gearbox mechanism;

[0021] The top of the flush pipe support unit is connected to the neck support of the gooseneck support unit;

[0022] The bottom port of the replaceable flushing pipe is threadedly connected to the main shaft of the top drive main body gearbox mechanism;

[0023] The top port of the replaceable flushing tube is threadedly connected to the bottom port of the gooseneck bracket unit;

[0024] The replaceable lower sealing unit is sealingly arranged around the main shaft connection port of the top drive main body gearbox mechanism to seal the connection portion between the replaceable wash pipe and the main shaft;

[0025] The replaceable upper sealing unit is arranged around the top port of the replaceable flushing tube to seal the connection between the replaceable flushing tube and the gooseneck bracket unit;

[0026] The replaceable flushing tube is a large-diameter flushing tube or a small-diameter flushing tube;

[0027] The sizes of the replaceable upper sealing unit and the replaceable lower sealing unit match the sizes of the replaceable flushing tube.

[0028] Preferably, the top drive floating mechanism comprises: a first floating jump unit and a second floating jump unit;

[0029] The first floating jump unit and the second floating jump unit have the same structure;

[0030] The first floating jump unit and the second floating jump unit are respectively arranged rotationally symmetrically on both sides of the top drive main body gearbox mechanism;

[0031] The first floating jump unit and the second floating jump unit are both connected to a heave compensation system on the offshore derrick;

[0032] The hanging pin connectors on both sides of the top drive main body gearbox mechanism are respectively hung on the first floating jump unit and the second floating jump unit;

[0033] The top drive body gearbox mechanism can be installed on the marine derrick with the aid of the first floating jump unit and the second floating jump unit.

[0034] Preferably, the first floating jump unit comprises: an L-shaped sliding seat body, a jump balancing cylinder assembly, an active heave compensation connection assembly, an anti-torsion beam connection assembly and a passive heave compensation connection assembly;

[0035] The back side of the L-shaped slide body is provided with a slide groove for passing the pin shaft of the offshore top drive hanging pin connector;

[0036] The slide groove has a free travel space in the vertical direction to meet the needs of upward sliding of the top drive main body gearbox mechanism;

[0037] The upward balancing cylinder assembly is arranged in the vertical direction of the long side of the L-shaped sliding seat body;

[0038] The upward balancing cylinder assembly is connected to the top drive main body gearbox mechanism;

[0039] The active heave compensation connection assembly is detachably arranged at one end of the short side of the L-shaped sliding seat body;

[0040] The passive heave compensation connection assembly is arranged on the short side body of the L-shaped sliding seat body;

[0041] The anti-torsion beam connection assembly is arranged on the L-shaped sliding seat body.

[0042] Preferably, the back clamp mechanism comprises: a cantilever portion and a clamping portion;

[0043] The top of the cantilever part is connected to the back of the top drive main body gearbox mechanism;

[0044] The bottom of the cantilever portion is connected to the clamping portion;

[0045] Wherein, the cantilever part comprises: an anti-torque outer cylinder unit, an anti-torque inner cylinder unit and a suspension telescopic unit;

[0046] The top of the anti-torque outer cylinder unit is connected to the back of the top drive;

[0047] The anti-torque inner cylinder unit and the anti-torque outer cylinder unit are connected by means of the suspension telescopic unit;

[0048] The anti-torque inner cylinder unit realizes the telescopic function of the cantilever part by means of the suspension telescopic unit;

[0049] The bottom of the anti-torque inner cylinder unit is connected to the clamping portion;

[0050] The clamping part can realize the thread alignment of the drill rod and the top drive main shaft by means of the telescopic extension of the cantilever part.

[0051] Preferably, the top drive body gearbox mechanism comprises: a dual servo drive motor assembly, a hydraulic shift drive assembly and a gearbox;

[0052] The dual servo drive motor assembly and the hydraulic shift drive assembly are both arranged on the gearbox;

[0053] The gearbox comprises: a housing, a dual input shaft, a main shaft, two speed change gears and a shift paddle assembly;

[0054] The dual input shafts, the main shaft, the two speed change gears and the shift paddle assembly are all disposed in the housing;

[0055] The dual input shafts are drivingly connected to the dual servo drive motor assemblies respectively;

[0056] The shift paddle assembly is drivingly connected to the hydraulic shift drive assembly;

[0057] The two speed change gears are arranged on the main shaft;

[0058] The dual input shaft drives the main shaft to rotate through the two speed change gears;

[0059] The hydraulic shift drive assembly drives the shift paddle assembly to switch the two speed gears to achieve large and small speed ratio transmission of the main shaft.

[0060] Preferably, the lifting ring mechanism comprises: a swing frame cylinder assembly, a swing frame assembly, a connecting rod assembly and a lifting ring assembly;

[0061] The swing frame cylinder assembly is arranged on the cantilever part;

[0062] The swing frame assembly is hinged on the outer wall of the gearbox;

[0063] The driving end of the swing frame oil cylinder assembly is hinged to the swing frame assembly;

[0064] The two ends of the connecting rod assembly are respectively connected to the end of the swing frame assembly and the lifting ring assembly;

[0065] A drill pipe elevator of a top drive is arranged at the bottom of the lifting ring assembly;

[0066] The swing frame oil cylinder assembly can drive the swing frame assembly to swing freely with the hinge of the gearbox as a fixed point;

[0067] When the swing frame assembly swings, it can synchronously drive the lifting ring assembly to swing through the connecting rod assembly, and synchronously drive the lifting card to swing to a predetermined position, so as to load and unload the drill pipe to the predetermined position.

[0068] Preferably, the gooseneck bracket unit comprises: a lower connecting flange, a welded pipe, an upper connecting flange, a connecting pipe and a mud pipe;

[0069] The lower connecting flange is fixedly arranged at the bottom end of the welded pipe;

[0070] The upper connecting flange is fixedly arranged at the top end of the welded pipe;

[0071] One end of the connecting pipe is arranged on the side wall of the welded pipe;

[0072] The other end of the connecting pipe is connected to the mud pipe;

[0073] The mud pipe is communicated with the welding pipe by means of the connecting pipe.

[0074] Preferably, the upper connecting flange is connected to a sampling pipeline.

[0075] When the replaceable flushing tube is of small diameter:

[0076] The replaceable upper sealing unit further comprises: an upper transition plate;

[0077] The replaceable flushing pipe is connected to the gooseneck bracket unit by means of the upper transition plate;

[0078] The replaceable lower sealing unit further comprises: a lower transition plate;

[0079] The replaceable flushing tube is connected to the main shaft of the gearbox by means of the lower transition plate.

[0080] (III) Beneficial effects

[0081] The beneficial effects of the present invention are as follows: the top drive system for marine engineering survey and coring drilling provided by the present invention has the following beneficial effects:

[0082] (1) The flushing mechanism can be quickly disassembled and replaced on the top drive, thus avoiding the time and economic costs of replacing the top drive system.

[0083] (2) The seal of the sealing unit has the advantage of wear compensation, which is not only convenient for disassembly and replacement, but also prolongs the service life of the sealing unit.

[0084] (3) The pipe flushing mechanism is suitable for top drive in engineering surveys of various seabed strata.

[0085] (4) The dual-channel replaceable flushing mechanism enables the offshore top drive to meet both the process requirements for high-speed diamond rope coring in hard rock formations on the seabed and the process and functional requirements for low-speed rotary drilling in soft rock on the seabed and the passage of CPT sampling tools.

[0086] (5) Heave compensation multi-space concentration.

[0087] (6) Centralized and compact; lightweight, high clearance, and high-level operation safety for large tonnage.

[0088] (7) Floating controllability and accuracy of thread unscrewing and unscrewing.

[0089] (8) With torque transmission guide: large torque transmission and axial floating guide.

[0090] (9) Ensure that the upper jump cylinder is not stressed during the heavy-load process of drilling and lowering, and only bears the weight of the top drive when the upper jump operation is required during the process of screwing and unscrewing. The stroke is not limited by the screw during the floating process.

[0091] (10) It meets the functional connection of heave compensation and the floating requirements of thread unscrewing and removing.

[0092] (11) It meets the multi-functional requirements in limited space.

[0093] (12) It meets the needs of marine drilling heave compensation, automated unscrewing and limited space on the marine derrick.

[0094] (13) The back-up clamp has a telescopic function to ensure the alignment of the drill pipe and the main shaft thread and protect the thread.

[0095] (14) The self-floating clamping slip structure allows automatic alignment with the drill pipe center as the slip center.

[0096] (15) The adjustable telescopic cylinder guide compensation structure satisfies the requirements of wear compensation and flexible alignment during operation.

[0097] (16) The separate replacement of large and small slips saves operating space and reduces the difficulty of replacement.

[0098] (17) It can automatically move and swing the top drive pipe string in a limited space.

[0099] (18) Cooperate with the top drive to complete the lifting and unscrewing operations of the pipe column.

[0100] (19) The four-link structure completes the swing of the lifting ring to meet the needs of lightweight marine top drive small body.

[0101] (20) The lifting ring cylinder is connected to the back-up clamp, with a compact structure, which is convenient for lifting the pipe column; the lifting ring and the hanging basket are reasonably connected, etc.

[0102] (21) Hydraulic control shifting is used to meet the process requirements of high and low speeds.

[0103] (22) The output shaft is used for gear shifting to meet the needs of small body space.

[0104] (23) The bottom is load-bearing and the upper part is non-load-bearing, so as to achieve a small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0105] Figure 1 A structural diagram of a top drive system for marine engineering survey and coring drilling provided by the present invention;

[0106] Figure 2 A structural diagram of a top drive system for marine engineering survey and coring drilling provided by the present invention;

[0107] Figure 3 It is a structural schematic diagram of the dual-channel replaceable flushing pipe mechanism in the present invention;

[0108] Figure 4 It is a structural diagram of the flushing pipe support of the dual-channel replaceable flushing pipe mechanism in the present invention;

[0109] Figure 5 It is a structural diagram of the gooseneck tube support unit in the dual-channel replaceable flushing tube mechanism of the present invention;

[0110] Figure 6 It is a structural diagram of a large-diameter flushing pipe of a dual-channel replaceable flushing pipe mechanism in the present invention;

[0111] Figure 7 It is a structural schematic diagram of a small-diameter flushing pipe in a dual-channel replaceable flushing pipe mechanism of the present invention;

[0112] Figure 8 It is a side structural diagram of the first floating jump unit in the top drive floating mechanism of the present invention;

[0113] Fig. 9 It is a structural diagram of the first floating jump unit in the top drive floating mechanism of the present invention;

[0114] Fig.10 It is a structural diagram of the first floating jump unit in the top drive floating mechanism of the present invention;

[0115] Fig.11 It is a back structural diagram of the first floating jump unit in the top drive floating mechanism of the present invention;

[0116] Fig.12 It is a schematic diagram of the side structure of the back-up clamp in the present invention;

[0117] Fig.13 It is a structural schematic diagram of the back-up clamp in the present invention from a three-dimensional perspective;

[0118] Fig.14 It is a schematic structural diagram of the middle anti-torque inner cylinder unit in the present invention;

[0119] Fig.15 It is a schematic structural diagram of the anti-torque outer cylinder unit in the present invention;

[0120] Fig.16 is a cross-sectional view of the cantilever portion of the present invention;

[0121] Fig.17 It is a structural schematic diagram of the clamping part in the present invention;

[0122] Fig.18 It is a side structural schematic diagram of the lifting ring mechanism in the present invention;

[0123] Fig.19 It is a front structural schematic diagram of the lifting ring mechanism in the present invention;

[0124] Fig. 20 It is a schematic diagram of the back structure of the swing frame assembly of the lifting ring mechanism in the present invention;

[0125] Fig.21 It is a three-dimensional structural schematic diagram of the swing frame assembly of the lifting ring mechanism in the present invention;

[0126] Fig. 22 It is a structural schematic diagram of the first connecting rod monomer in the lifting ring mechanism of the present invention;

[0127] Fig.23 It is a structural schematic diagram of the lifting ring connecting member in the lifting ring mechanism of the present invention.

[0128] [Description of Reference Numerals]

[0129] 1: Upper connection coring assembly; 2: Dual-channel replaceable flushing pipe mechanism; 3: Top drive main gearbox mechanism; 4: Top drive floating mechanism; 5: Back-up clamp mechanism; 6: Lifting ring mechanism; 21: Flushing pipe support unit; 2101: Top flange; 2102: Bottom flange; 2103: Support; 22: Upper sealing unit; 2201: Upper pressure sleeve; 2202: U-shaped seal; 2203: Clamp ring; 2204: O-ring; 2205: Upper transition plate; 23: Lower sealing unit; 2301 : Sealing box; 2302: Tie rod seal; 2303: Gland; 22304: U-shaped seal: 22305: Lower transition plate; 24: Replaceable punching pipe; 25: Gooseneck support unit; 2501: Lower connecting flange; 2502: Welding pipe; 2503: Upper connecting flange; 2504: Connecting pipe; 2505: Mud pipe; 26: Top drive body; 41: First pin hole; 42: Anti-torsion beam connection assembly; 43: First L-shaped vertical plate; 44: Shackle connector; 45: Balance cylinder; 46: chute; 47: passive heave compensation connection assembly; 48: bottom plate; 49: parallel vertical plate; 410: active heave compensation connection pin; 411: upper jump connection piece; 412: hanging pin connection piece; 413: lifting eye shaft; 51: upper connection assembly; 52: rectangular outer cylinder; 53: lifting eye cylinder seat; 54: exploration window; 55: rectangular inner cylinder; 56: lower connection assembly; 57: inner cylinder upper sealing assembly; 58: telescopic cylinder; 59: bottom tray assembly; 510: first spring guide rod; 511: first floating spring; 512: rectangular box; 513: bell mouth; 514: connecting assembly; 515: cava cylinder; 516: spherical universal joint; 517: cava seat; 518: split cava block; 61: swing frame cylinder assembly; 62: swing frame assembly; 63: connecting rod assembly; 64: lifting ring assembly; 65: lifting ring connector; 6501: connecting base; 6502: connecting plate; 66: first connecting assembly; 67: second connecting assembly; 68: third connecting assembly. DETAILED DESCRIPTION

[0130] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0131] like Figure 1 and Figure 2 As shown: This embodiment discloses a top drive system for marine engineering survey and coring drilling, including: an upper connecting coring assembly 1, a dual-channel replaceable flushing pipe mechanism 2, a top drive floating mechanism 4, a back-up clamp mechanism 5, a top drive main body gearbox mechanism 3 and a lifting ring mechanism 6; the upper connecting coring assembly 1 is arranged on the top of the dual-channel replaceable flushing pipe mechanism 2 and connected to the top of the dual-channel replaceable flushing pipe mechanism 2; the bottom of the dual-channel replaceable flushing pipe mechanism 2 is connected to the top of the top drive main body gearbox mechanism 3.

[0132] The top drive floating mechanism 4 is connected to both sides of the top drive main gearbox mechanism 3; the back-up clamp mechanism 5 and the lifting ring mechanism 6 are also connected to the top drive main gearbox mechanism 3; the bottom main shaft of the top drive main gearbox mechanism 3 is connected to the drill pipe; the upper connecting coring assembly 1 can be connected to the main shaft of the top drive main gearbox mechanism 3 through the dual-channel replaceable flushing pipe mechanism 2; the CPT sampling drill rod can penetrate into the main shaft from the top of the upper connecting coring assembly 1, and further probe to the bottom of the drill pipe, so as to take geological samples under the drill pipe.

[0133] About the dual-channel replaceable flushing mechanism

[0134] like Figure 3-Figure 7 As shown in the figure, the dual-channel replaceable flushing pipe mechanism in this embodiment includes: a flushing pipe support unit 21, a replaceable upper sealing unit 22, a replaceable lower sealing unit 23, a replaceable flushing pipe 24 and a gooseneck support unit 25. The bottom of the flushing pipe support unit 21 is connected to the top of the top drive body; the top of the flushing pipe support unit 21 is connected to the neck support of the gooseneck support unit 25.

[0135] The bottom port of the replaceable wash pipe is threadedly connected to the main shaft of the top drive body 26; the top port of the replaceable wash pipe 24 is threadedly connected to the bottom port of the gooseneck support unit 25; the replaceable lower sealing unit 23 is sealingly arranged around the main shaft connection port of the top drive body 26 to seal the connection between the replaceable wash pipe 24 and the main shaft. The replaceable upper sealing unit 22 is arranged around the top port of the replaceable wash pipe 24 to seal the connection between the replaceable wash pipe 24 and the gooseneck support unit 25; the replaceable wash pipe 24 is a large-diameter wash pipe or a small-diameter wash pipe; the sizes of the replaceable upper sealing unit 22 and the replaceable lower sealing unit 23 match the size of the replaceable wash pipe 24.

[0136] It should be noted that the replaceable lower sealing unit 23 and the replaceable upper sealing unit 22 are matching components with the corresponding diameter flushing pipe. When replacing the flushing pipe in actual application, the upper sealing unit 22 and the lower sealing unit 23 of the corresponding matching size need to be replaced simultaneously.

[0137] For example, when performing CPT sampling, the sampling tool needs to pass through the top drive spindle of the punch pipe in turn and go down into the underground for sampling. At this time, a large-diameter punch pipe that matches the sampling tool is required; when performing diamond rope coring, high-speed drilling is required. Due to the limitation of linear speed, a small-diameter punch pipe is replaced.

[0138] The replaceable lower sealing unit 23 described in this embodiment includes: a sealing box 2301, a tie rod seal 2302 and a pressure cover 2303; the sealing box 2301 is arranged at the main shaft connection port on the upper part of the top drive body 26, and is sleeved on the outer wall of the replaceable flushing tube 24. The tie rod seal 2302 is arranged between the outer wall of the replaceable flushing tube 24 and the inner wall of the sealing box 2301; the pressure cover 2303 is sleeved on the outer wall of the replaceable flushing tube 24 and covers the sealing box 2301.

[0139] In detail, the gland 2303 is connected to the sealing box 2301 by a screw; the bottom of the gland 2303 is pressed against the top of the tie rod seal 2302 to seal the tie rod seal 2302; the gland 2303 can adjust the downward stroke by means of a screw. A U-shaped seal 2304 is also provided between the sealing box 2301 and the top drive body 26 in this embodiment to enhance the sealing performance of the sealing device.

[0140] It should be noted that the sealing cover 2303 and the tie rod seal 2302 of the lower sealing unit 23 have the advantage of wear compensation, which is not only convenient for disassembly and replacement, but also prolongs the service life of the sealing unit.

[0141] The replaceable upper sealing unit 22 described in this embodiment includes: an upper pressure sleeve 2201, a U-shaped seal 2202 and a clamping ring 2203; the upper pressure sleeve 2201 is sleeved on the outer wall of the upper part of the replaceable punch tube 24; an annular groove is provided on the inner wall of the upper pressure sleeve 2201; and the U-shaped seal 2202 is arranged in the annular groove. An annular groove for the punch tube is provided on the outer wall of the upper part of the replaceable punch tube 24; the clamping ring 2203 is clamped in the annular groove for the punch tube above the upper pressure sleeve 2201. The upper pressure sleeve 2201 described in this embodiment is provided with a plurality of bolt holes; the upper pressure sleeve 2201 is connected to the gooseneck bracket unit 25 through a plurality of bolts and the plurality of bolt holes.

[0142] The flushing pipe support unit 21 in this embodiment includes: a support part 2103, a top flange part 2101 and a bottom flange part 2102; the top flange part 2101 is fixedly arranged at the top of the support part 2103; the bottom flange part 2102 is fixedly arranged at the bottom of the support part 2103; the bottom flange part 2102 is connected to the top drive body 26; the top flange part 2101 is connected to the gooseneck support unit 25. In this embodiment, the top flange part 2101 and the bottom flange part 2102 are both provided with a plurality of threaded holes; the bottom flange part 2102 is fixedly arranged on the top drive body 26 by bolts and a plurality of threaded holes; the gooseneck support unit 25 is fixedly arranged on the top flange part 2101 by means of bolts and a plurality of threaded holes.

[0143] The gooseneck support unit 25 described in this embodiment includes: a lower connecting flange 2501, a welded pipe 2502, an upper connecting flange 2503, a connecting pipe 2504 and a mud pipe 2505. In detail, the lower connecting flange 2501 is fixedly arranged at the bottom end of the welded pipe 2502; the upper connecting flange 2503 is fixedly arranged at the top end of the welded pipe 2502; one end of the connecting pipe 2504 is arranged on the side wall of the welded pipe 2502. The other end of the connecting pipe 2504 is connected to the mud pipe 2505; the mud pipe 2505 is connected to the welded pipe 2502 by means of the connecting pipe 2504.

[0144] In this embodiment, the lower connecting flange 2501 is connected to the upper sealing unit 22; the lower connecting flange 2501 is connected to the top flange 2101 of the flushing support unit 21 and the upper pressing sleeve 2201 by bolts, wherein an annular groove is provided on the connecting surface of the upper pressing sleeve 2201; an O-ring is provided in the annular groove, and the O-ring is greased during assembly and replaced regularly according to the usage. In addition, the upper connecting flange 2503 is connected to the top electric control ball valve component.

[0145] When the replaceable flush pipe 24 has a small diameter: the replaceable upper sealing unit 22 also includes: an upper transition plate 2205; the replaceable flush pipe 24 is connected to the gooseneck support unit 25 by means of the upper transition plate 2204; the replaceable lower sealing unit 23 also includes: a lower transition plate 2305; the replaceable flush pipe 24 is connected to the main shaft of the top drive body 26 by means of the lower transition plate 2305.

[0146] About Top Drive Floating Mechanism

[0147] like Figure 8-Figure 11 As shown: the top drive floating mechanism 4 in this embodiment includes: a first floating jumping unit and a second floating jumping unit.

[0148] The first floating jump unit and the second floating jump unit have the same structure; the first floating jump unit and the second floating jump unit are rotationally symmetrically arranged on both sides of the offshore top drive.

[0149] The first floating jump unit and the second floating jump unit are both connected to the heave compensation system on the offshore derrick; the hanging pin connectors 412 on both sides of the offshore top drive are respectively suspended on the first floating jump unit and the second floating jump unit; the offshore top drive can be installed on the offshore derrick with the help of the first floating jump unit and the second floating jump unit.

[0150] In practical applications, the top drive floating mechanism suitable for wave heave compensation provided in this embodiment integrates the connection components for hanging the top drive, heave compensation and jump functions. It achieves the purpose of centralized compactness, lightweight, and large-tonnage high-position safe operation; it also ensures that the jump cylinder is not stressed during the heavy-load process of drilling and drilling, and only bears the weight of the top drive when the jump operation is required during the process of screwing and unscrewing, and the stroke is not limited by the thread during the floating process.

[0151] The first floating jump unit described in this embodiment includes: an L-shaped sliding seat body, a jump balancing cylinder assembly, an active heave compensation connection assembly, an anti-torsion beam connection assembly 42 and a passive heave compensation connection assembly 47.

[0152] The back side of the L-shaped slide body is provided with a slide groove 46 for passing the pin shaft of the offshore top drive hanging pin connector 412; the slide groove 46 has a free travel space in the vertical direction to meet the requirements of the offshore top drive upward jump sliding; the upward jump balancing cylinder assembly is arranged in the vertical direction of the long side of the L-shaped slide body.

[0153] It should be noted that a guide copper pad is also provided at the pin shaft of the hanging pin connector 412 of the offshore engineering top drive to help the offshore engineering top drive to rise and fall more accurately along the slide groove 46 when jumping up.

[0154] The upward balancing cylinder assembly is connected to the offshore top drive; the active heave compensation connection assembly is detachably arranged at one end of the short side of the L-shaped slide body; the passive heave compensation connection assembly 47 is arranged on the short side of the L-shaped slide body; the anti-torsion beam connection assembly 42 is arranged on the L-shaped slide body. The L-shaped slide body described in this embodiment includes: a first L-shaped vertical plate 43, a second L-shaped vertical plate and an intermediate fixed connection plate.

[0155] In detail, the first L-shaped vertical plate 43 and the second L-shaped vertical plate have the same structure; the first L-shaped vertical plate 43 and the second L-shaped vertical plate are arranged in parallel; the first L-shaped vertical plate 43 and the second L-shaped vertical plate are fixedly connected together by means of the intermediate fixed connecting plate to form the L-shaped sliding seat body. The intermediate fixed connecting plate can be provided in plurality according to actual needs, in order to meet the structural strength and structural stability of the entire L-shaped sliding seat body.

[0156] The first L-shaped vertical plate 43 described in this embodiment is provided with a first pin hole 1 at the top of the long side; the first L-shaped vertical plate 43 is provided with the slide groove 46 in the vertical direction of the long side; the first L-shaped vertical plate 43 is provided with a second pin hole on the short side; the first pin hole 41 is used to connect the locking cylinder of the heave compensation system. The slide groove 46 is used to connect and set the offshore top drive; the second pin hole is used to set the passive heave compensation connection assembly 47. The L-shaped sliding seat body integrates the connection properties of heave compensation and derrick, making the equipment more space-saving and meeting the needs of use on marine ships.

[0157] The upward jump balancing cylinder assembly described in this embodiment includes: a shackle connector 44, a balancing cylinder 45 and an upward jump connector 411; the shackle connector 44 is fixed on the long side of the first L-shaped vertical plate 43; one end of the balancing cylinder 45 is connected to the shackle connector 44, and the other end is connected to the upward jump connector 411.

[0158] In actual application, the shackle connector 44 is set on the L-shaped slide body with the help of the lifting eye shaft 413; the lifting eye shaft 413 bears the gravity of the shackle connector 44, the balancing cylinder 45 and the upper jump connector 411; the lifting eye shaft 413 passes through the first L-shaped vertical plate 43 and the second L-shaped vertical plate and is fixed.

[0159] The balancing oil cylinder 45 is arranged on the L-shaped slide body by means of the shackle connector 44 ; the balancing oil cylinder 45 is connected to the offshore top drive through the upper jump connector 411 .

[0160] Specifically, the balancing oil cylinder 45 is arranged on the side of the L-shaped slide body, which not only has a simple structure and saves space, but also improves the stability of the entire mechanism.

[0161] The balancing cylinder 45 described in this embodiment is hung on the L-shaped slide body in the vertical direction with the help of the shackle connector 44; when jumping is required, the balancing cylinder 45 contracts the jumping connector 411 to pull the offshore top drive upward; the slide groove 46 can cooperate with the balancing cylinder 45 to lift the offshore top drive to a set height.

[0162] The active heave compensation connection assembly described in this embodiment includes: a mounting seat and an active heave compensation connection pin 410; the mounting seat is fixedly arranged on the end surface of the short side of the L-shaped sliding seat body by bolts.

[0163] The mounting base includes: a bottom plate 48, two parallel vertical plates 49 and plate ribs; the two parallel vertical plates 49 are fixedly arranged on the bottom plate 48; the plate ribs are respectively connected to the bottom plate 48 and the two parallel vertical plates 49 to fix the two parallel vertical plates 49. It should be noted that the two parallel vertical plates 49 have the same structure and are preferably formed as an integral structure with the bottom plate 48 and the plate ribs.

[0164] The active heave compensation connecting pin 410 is disposed on the two parallel vertical plates 49 ; the active heave compensation cylinder is connected to the first floating jump unit via the active heave compensation connecting pin 410 .

[0165] The anti-torsion beam connection assembly 42 described in this embodiment includes: a first connection member and a second connection member; the first connection member is arranged on the inner side of the upper end of the long side of the L-shaped slide body; the second connection member is arranged on the bottom surface of the short side of the L-shaped slide body. The arrangement of the anti-torsion beam connection assembly 42 further concentrates the effectiveness of space, and there is no need to set up a bracket specifically for connecting the anti-torsion beam, so that the equipment is more efficient and the cost is lower.

[0166] The passive heave compensation connection assembly 47 in this embodiment includes: a limit member and the passive heave compensation connection pin; the passive heave compensation connection pin is arranged in the second pin hole; the limit member is arranged on the first L-shaped vertical plate 43, so as to limit the passive heave compensation connection pin in the second pin hole.

[0167] In this embodiment, the balancing oil cylinder 45 is connected to a control device of the offshore derrick system; the control device can control the balancing oil cylinder 45 to start or stop the upward jump operation.

[0168] It should be noted that the first floating jump unit and the second floating jump unit need to be used at the same time to ensure the smooth progress of heave compensation and jump work. In actual application, the two are arranged on both sides of the offshore top drive in a rotationally symmetrical manner to ensure the balance and stability of both sides.

[0169] About the back-up clamp mechanism

[0170] like Figure 12-Figure 17 As shown: the back-up clamp mechanism 5 in this embodiment includes: a cantilever part and a clamping part; the top of the cantilever part is connected to the back of the top drive; the bottom of the cantilever part is connected to the clamping part. The cantilever part has a telescopic function and can synchronously drive the clamping part to rise and fall to achieve accurate centering or unscrewing of the drill pipe and the top drive main shaft.

[0171] Wherein, the cantilever part includes: an anti-torque outer cylinder unit, an anti-torque inner cylinder unit and a suspension telescopic unit; the top of the anti-torque outer cylinder unit is connected to the back of the top drive; the anti-torque inner cylinder unit and the anti-torque outer cylinder unit are connected by means of the suspension telescopic unit.

[0172] In detail, the anti-torque inner cylinder unit realizes the telescopic function of the cantilever part with the help of the suspension telescopic unit; the bottom of the anti-torque inner cylinder unit is connected to the clamping part; the clamping part can realize the thread alignment of the drill rod and the top drive main shaft with the help of the telescopic function of the cantilever part.

[0173] The anti-torque outer cylinder unit described in this embodiment includes: a rectangular outer cylinder 52, an upper connecting assembly 51 and a lifting eye oil cylinder seat 53. The upper connecting assembly 51 is arranged on the top side of the rectangular outer cylinder 52; an outer cylinder cover is arranged on the top of the rectangular outer cylinder 52; the rectangular outer cylinder 52 can be fixedly arranged on the back of the top drive by means of the upper connecting assembly 51.

[0174] It should be noted that the upper connection assembly 51 is a mechanical connection assembly, which mainly realizes a firm connection between components by bolts. The lifting ring oil cylinder seat 53 is installed on the outer wall of the rectangular outer cylinder 52 to set the oil cylinder of the lifting ring. The installation of the lifting ring oil cylinder seat 53 on the rectangular outer cylinder 52 can further optimize the space utilization of the top drive system, reduce the occupied space, and lay a good foundation for realizing the miniaturization of the system on the seagoing vessel.

[0175] The anti-torque inner cylinder unit described in this embodiment includes: a rectangular inner cylinder 55, an inner cylinder upper sealing assembly 57 and a lower connecting assembly 56. In detail, the inner cylinder upper sealing assembly 57 is arranged inside the rectangular inner cylinder 5 and connected to the inner wall of the rectangular inner cylinder 55; the lower connecting assembly 56 is fixedly arranged at the bottom of the rectangular inner cylinder 55; the rectangular inner cylinder 55 is connected to the clamping part by means of the lower connecting member 56. The rectangular inner cylinder 55 is suspended in the rectangular outer cylinder 52 by means of the cooperation of the inner cylinder upper sealing assembly 57 and the suspension telescopic unit.

[0176] The suspension telescopic unit described in this embodiment includes: a telescopic oil cylinder 58, a bottom tray assembly 59 and a double floating spring assembly; the top of the telescopic oil cylinder 58 is connected to the upper connecting assembly 51 in the rectangular outer cylinder by bolts. The telescopic shaft of the telescopic oil cylinder 58 passes through the inner cylinder upper sealing assembly 57 and enters the interior of the rectangular inner cylinder 55; the bottom of the telescopic shaft is fixedly connected to the bottom tray assembly 59; the floating spring assembly is arranged on the bottom tray assembly 59.

[0177] In detail, the double floating spring assembly includes: a first floating spring 511, a second floating spring, a first spring guide rod 510 and a second spring guide rod. The first spring guide rod 510 and the second spring guide rod are symmetrically and vertically fixed on the bottom tray assembly 59; the first floating spring 511 and the second floating spring are respectively sleeved on the first spring guide rod 510 and the second spring guide rod.

[0178] The inner cylinder upper sealing assembly 57 described in this embodiment is provided with a first perforation, a second perforation and a third perforation; the first perforation and the second perforation have the same size; the first perforation and the second perforation are used for the penetration of the first spring guide rod 510 and the second spring guide rod respectively.

[0179] Correspondingly, the size of the third through hole is set in the center; the first through hole and the second through hole are symmetrically arranged on both sides of the third through hole; the size of the third through hole matches the telescopic shaft of the telescopic oil cylinder 58, and is used for the telescopic shaft of the telescopic oil cylinder 58 to pass through. The ends of the first spring guide rod 510 and the second spring guide rod passing through the inner cylinder upper sealing assembly 57 are nuts and pins, which are used to limit the position on the inner cylinder upper sealing assembly 57.

[0180] The bottom tray assembly 59 described in this embodiment is sleeved with a self-lubricating copper sleeve; the bottom tray assembly 59 can contact the inner wall of the rectangular inner tube 55 with the help of the self-lubricating copper sleeve. The rectangular outer tube 52 is provided with a probe window 54; a guide compensation device is also provided between the rectangular outer tube 52 and the rectangular inner tube 55; the probe window 54 can be opened or closed to replace the guide compensation device.

[0181] It should be noted that the guide compensation device is a copper pad attached to the inner wall of the rectangular outer cylinder 52.

[0182] The clamping part described in this embodiment includes: a rectangular box 512, a first slip clamping assembly and a second slip clamping assembly; a vertically penetrating channel suitable for inserting a drill rod is provided in the middle of the rectangular box 512. The first slip clamping assembly and the second slip clamping assembly are symmetrically arranged in the rectangular box 512 on both sides of the channel; the first slip clamping assembly and the second slip clamping assembly can cooperate to clamp the drill rod passing through the channel; in detail, a bell mouth assembly 513 is provided at the lower end of the channel to facilitate the insertion of the drill rod into the channel.

[0183] The first slip clamping assembly and the second slip clamping assembly described in this embodiment have the same structure; wherein, the first slip clamping assembly comprises: a slip cylinder 515, a spherical universal joint 516, a slip seat 517 and a split slip block 518. The slip cylinder 515 is connected to the spherical universal joint 516; the slip seat 517 is connected to the spherical universal joint 516; the split slip block 518 is detachably arranged on the slip seat 517. When the slip cylinder 515 pushes the spherical universal joint 516, the spherical universal joint 516 drives the slip seat 517 and the split slip block 518 to clamp the drill pipe in the channel.

[0184] The rectangular box 512 described in this embodiment is provided with a connecting assembly 5514; the rectangular box 512 is connected to the rectangular inner cylinder 55 through the connecting assembly 514 and the lower connecting assembly 56; both ends of the rectangular box 512 are provided with end covers; the end covers are detachably connected to both ends of the rectangular box 512. It should be noted that the provision of the end covers can facilitate rapid repair or replacement of parts when parts such as the slip cylinder 515 in the rectangular box 512 fail.

[0185] About the lifting ring mechanism

[0186] like Figure 18-Figure 23 As shown: the lifting ring mechanism in this embodiment includes: a swing frame cylinder assembly 61, a swing frame assembly 62, a connecting rod assembly 63 and a lifting ring assembly 64. In detail, the swing frame cylinder assembly 61 is arranged on the back clamp of the offshore top drive; the swing frame assembly 62 is hinged on the outer wall of the gearbox of the offshore top drive; the driving end of the swing frame cylinder assembly 61 is hinged to the swing frame assembly 62; and the two ends of the connecting rod assembly 63 are respectively connected to the end of the swing frame assembly 62 and the lifting ring assembly 64.

[0187] In this embodiment, a top-driven drill pipe basket is arranged at the bottom of the lifting ring assembly 64; the swing frame cylinder assembly 61 can drive the swing frame assembly 62 to swing freely with the hinge of the gearbox as a fixed point; when the swing frame assembly 62 swings, it can synchronously drive the lifting ring assembly 64 to swing through the connecting rod assembly 63, and synchronously drive the basket to swing to a predetermined position, so as to load and unload the drill pipe to the predetermined position.

[0188] It should be noted that: on the marine engineering survey ship, due to the small hull space, but the drilling top drive system needs to be installed on the ship, so the drilling top drive system is required to have limited space and lightweight; during offshore exploration operations, a derrick is installed on the ship, and a heave compensation frame, an anti-torque beam frame and a marine top drive are installed on the derrick; the marine top drive needs to complete the lifting and unscrewing operations of the pipe string on the ship. The lifting ring mechanism in this embodiment can cooperate with the lifting and unscrewing operations of the pipe string on the ship, while meeting the requirements of limited space and lightweight on the ship. The connecting rod assembly 63 and the lifting ring assembly 64 constitute a four-link structure; and the four-link structure can complete the swing of the lifting ring, meeting the requirements of a lightweight marine top drive.

[0189] The swing frame assembly 62 in this embodiment includes: a Y-shaped swing frame body, a first connecting assembly 66, a second connecting assembly 67 and a third connecting assembly 68; the Y-shaped swing frame body includes: a head, a first swing arm and a second swing arm; the first swing arm and the second swing arm have the same structure; the first swing arm and the second swing arm are symmetrically arranged on both sides of the bottom of the head. The first swing arm, the second swing arm and the head are an integrally formed structure; the first connecting assembly 66 is detachably arranged on the top of the head; the Y-shaped swing frame body is connected to the outer wall of the gearbox by means of the first connecting assembly 66; the second connecting assembly 67 is detachably arranged at the bottom of the head. The driving end of the swing frame cylinder assembly 61 is connected to the Y-shaped swing frame body by means of the second connecting member 67; the third connecting assembly 68 is detachably arranged at the ends of the first swing arm and the second swing arm; the connecting rod assembly 63 is connected to the Y-shaped swing frame body by means of the third connecting assembly 68.

[0190] The design of the Y-shaped swing frame body can not only effectively achieve the purpose of intensive space, but also maximize the reduction of the weight of the equipment to meet the load requirements on board.

[0191] The second connecting component 67 described in this embodiment includes: a first connecting pin unit and a second connecting pin unit; the first connecting pin unit and the second connecting pin unit have the same structure; the first connecting pin unit and the second connecting pin unit are symmetrically arranged on both sides of the bottom of the head.

[0192] The third connecting component 68 described in this embodiment includes: a third connecting pin unit and a fourth connecting pin unit; the third connecting pin unit and the fourth connecting pin unit have the same structure; the third connecting pin unit and the fourth connecting pin unit are symmetrically arranged at the ends of the first lower swing cantilever and the second lower swing cantilever, respectively.

[0193] The above-mentioned connecting components are all existing standard connecting parts and will not be described in detail here.

[0194] The swing frame cylinder assembly 61 described in this embodiment includes: a first swing frame cylinder unit and a second swing frame cylinder unit; the first swing frame cylinder unit and the second swing frame cylinder unit have the same structure; the first swing frame cylinder unit and the second swing frame cylinder are symmetrically fixed on the two side walls of the top drive back embedment; the first swing frame cylinder unit and the second swing frame cylinder unit are both control-connected to the control end of the top drive system.

[0195] It should be noted that installing the swing frame cylinder assembly 61 on the back-up clamp of the top drive can not only improve the flexibility of the equipment, but also greatly improve the utilization rate of the space on board, and at the same time enhance the structural strength and stability of the entire lifting ring mechanism; in actual use, it also has the advantage of convenient disassembly and replacement. Accordingly, the lifting ring cylinder is connected to the back-up clamp, the structure is compact, and the lifting operation of the pipe column is convenient; the lifting ring and the hanging basket are reasonably connected.

[0196] The first swing frame cylinder unit described in this embodiment includes: a cylinder connecting seat and a swing frame cylinder; the cylinder connecting seat is fixedly arranged on one side of the top drive back embedment; the swing frame cylinder is installed on the cylinder connecting seat; the output end of the swing frame cylinder is connected to the Y-shaped swing frame body through the first connecting pin unit.

[0197] like Fig. 22 As shown: the connecting rod assembly 63 described in this embodiment includes: a first connecting rod monomer and a second connecting rod monomer; the first connecting rod monomer and the second connecting rod monomer have the same structure.

[0198] Wherein, both ends of the first connecting rod monomer are provided with pin holes; both ends of the first connecting rod monomer are respectively connected to the first lower swing cantilever and the lifting ring assembly through the pin holes.

[0199] The lifting ring assembly 64 described in this embodiment includes: a first lifting ring rod and a second lifting ring rod; the first lifting ring rod and the second lifting ring rod have the same structure; wherein, both ends of the first lifting ring rod are provided with connecting holes; the end of the first lifting ring rod is connected to the hanging basket through the connecting holes.

[0200] like Fig.23 As shown: the first lifting ring rod described in this embodiment is also provided with a lifting ring connector 65; the first railing monomer is connected to the first lifting ring rod through the lifting ring connector 65.

[0201] In detail, the lifting ring connector 65 in this embodiment includes: a connecting base 6501 and a connecting plate 6502; the first lifting ring rod is arranged between the connecting base 6501 and the connecting plate 6502; the connecting base 6501 and the connecting plate 6502 are connected by four bolt assemblies.

[0202] It should be noted that both the connecting rod assembly 63 and the lifting ring assembly 64 are double-monomer structures. In practical applications, the first lifting ring rod and the second lifting ring rod are respectively connected to the first connecting rod monomer and the second connecting rod monomer.

[0203] The first connecting rod monomer and the second connecting rod monomer described here are respectively connected to the third connecting pin unit and the fourth connecting pin unit; the first swing frame cylinder unit and the second swing frame cylinder unit are respectively connected to the first connecting pin unit and the second connecting pin unit.

[0204] Accordingly, the lifting ring mechanism provided in this embodiment, under the driving control of the swing frame cylinder assembly, not only satisfies the automatic swinging operation of the top drive pipe string in a limited space, but can also cooperate with the top drive to complete the lifting and unscrewing operations of the pipe string.

[0205] About the top drive gearbox mechanism

[0206] In this embodiment, the top drive main body gearbox mechanism includes: a dual servo drive motor assembly, a hydraulic shift drive assembly and a gearbox; the dual servo drive motor assembly and the hydraulic shift drive assembly are both arranged on the gearbox.

[0207] The gearbox comprises: a housing, a dual input shaft, a main shaft, two speed gears and a shift paddle assembly; the dual input shaft, the main shaft, the two speed gears and the shift paddle assembly are all arranged in the housing; the dual input shafts are respectively connected to the dual servo drive motor assembly. The shift paddle assembly is connected to the hydraulic shift drive assembly; the two speed gears are arranged on the main shaft; the dual input shaft drives the main shaft to rotate through the two speed gears; the hydraulic shift drive assembly drives the shift paddle assembly to switch the two speed gears to achieve a large and small speed ratio transmission of the main shaft.

[0208] The technical principles of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention and cannot be interpreted in any way as limiting the scope of protection of the present invention. Based on the explanations here, those skilled in the art can associate other specific implementations of the present invention without creative work, and these methods will fall within the scope of protection of the present invention.

Claims

1. A top drive system for marine engineering survey and coring drilling, It is characterized in that include: The upper part is connected with the coring assembly, the dual-channel replaceable flushing pipe mechanism, the top drive floating mechanism, the back-up clamp mechanism, the top drive main body gearbox mechanism and the lifting ring mechanism; The upper connecting coring assembly is arranged on the top of the dual-channel replaceable flushing tube mechanism and connected to the top of the dual-channel replaceable flushing tube mechanism; The bottom of the dual-channel replaceable flushing pipe mechanism is connected to the top of the top drive main body gearbox mechanism; The top drive floating mechanism is connected to both sides of the top drive main body gearbox mechanism; The top drive main body gearbox mechanism is also connected to the back-up clamp mechanism and the lifting ring mechanism; The bottom main shaft of the top drive main body gearbox mechanism is connected to the drill pipe; The upper connecting coring assembly can be connected to the main shaft of the top drive main body gearbox mechanism through the dual-channel replaceable flushing pipe mechanism; The CPT sampling drill rod can penetrate the main shaft from the top of the upper connection coring assembly and further probe to the bottom of the drill rod to take geological samples under the drill rod; The top drive floating mechanism comprises: a first floating jump unit and a second floating jump unit; The first floating jump unit and the second floating jump unit have the same structure; The first floating jump unit and the second floating jump unit are respectively arranged rotationally symmetrically on both sides of the top drive main body gearbox mechanism; The first floating jump unit and the second floating jump unit are both connected to a heave compensation system on the offshore derrick; The hanging pin connectors on both sides of the top drive main body gearbox mechanism are respectively hung on the first floating jump unit and the second floating jump unit; The top drive main body gearbox mechanism can be installed on the marine derrick by means of the first floating jump unit and the second floating jump unit; The first floating jump unit comprises: an L-shaped sliding seat body, a jump balancing cylinder assembly, an active heave compensation connection assembly, an anti-torsion beam connection assembly and a passive heave compensation connection assembly; The back side of the L-shaped slide body is provided with a slide groove for passing the pin shaft of the offshore top drive hanging pin connector; The slide groove has a free travel space in the vertical direction to meet the needs of upward sliding of the top drive main body gearbox mechanism; The upward balancing cylinder assembly is arranged in the vertical direction of the long side of the L-shaped sliding seat body; The upward balancing cylinder assembly is connected to the top drive main body gearbox mechanism; The active heave compensation connection assembly is detachably arranged at one end of the short side of the L-shaped sliding seat body; The passive heave compensation connection assembly is arranged on the short side body of the L-shaped sliding seat body; The anti-torsion beam connection assembly is arranged on the L-shaped sliding seat body.

2. The top drive system according to claim 1, It is characterized in that The upper connecting coring assembly comprises: a sampling pipeline, a sampling bell mouth and an electric-controlled ball valve assembly; The sampling bell mouth is arranged at the top of the sampling pipe; The bottom of the sampling pipeline is connected to the dual-channel replaceable flushing pipe mechanism through a flange; The electrically controlled ball valve assembly is arranged inside the sampling pipeline to control the closing or opening of the sampling pipeline.

3. The top drive system according to claim 2, It is characterized in that The dual-channel replaceable flushing pipe mechanism comprises: a flushing pipe support unit, a replaceable upper sealing unit, a replaceable lower sealing unit, a replaceable flushing pipe and gooseneck pipe support unit; The bottom of the flushing tube support unit is connected to the top of the top drive main body gearbox mechanism; The top of the flush pipe support unit is connected to the neck support of the gooseneck support unit; The bottom port of the replaceable flushing pipe is threadedly connected to the main shaft of the top drive main body gearbox mechanism; The top port of the replaceable flushing tube is threadedly connected to the bottom port of the gooseneck bracket unit; The replaceable lower sealing unit is sealingly arranged around the main shaft connection port of the top drive main body gearbox mechanism to seal the connection portion between the replaceable wash pipe and the main shaft; The replaceable upper sealing unit is arranged around the top port of the replaceable flushing tube to seal the connection between the replaceable flushing tube and the gooseneck bracket unit; The replaceable flushing tube is a large-diameter flushing tube or a small-diameter flushing tube; The sizes of the replaceable upper sealing unit and the replaceable lower sealing unit match the sizes of the replaceable flushing tube.

4. The top drive system according to claim 1, It is characterized in that The back-up clamp mechanism comprises: a cantilever portion and a clamping portion; The top of the cantilever part is connected to the back of the top drive main body gearbox mechanism; The bottom of the cantilever portion is connected to the clamping portion; Wherein, the cantilever part comprises: an anti-torque outer cylinder unit, an anti-torque inner cylinder unit and a suspension telescopic unit; The top of the anti-torque outer cylinder unit is connected to the back of the top drive; The anti-torque inner cylinder unit and the anti-torque outer cylinder unit are connected by means of the suspension telescopic unit; The anti-torque inner cylinder unit realizes the telescopic function of the cantilever part by means of the suspension telescopic unit; The bottom of the anti-torque inner cylinder unit is connected to the clamping portion; The clamping part can realize the thread alignment of the drill rod and the top drive main shaft by means of the telescopic extension of the cantilever part.

5. The top drive system according to claim 4, It is characterized in that The top drive main gearbox mechanism includes: dual servo drive motor assembly, hydraulic shift drive assembly and gearbox; The dual servo drive motor assembly and the hydraulic shift drive assembly are both arranged on the gearbox; The gearbox comprises: a housing, a dual input shaft, a main shaft, two speed change gears and a shift paddle assembly; The dual input shafts, the main shaft, the two speed change gears and the shift paddle assembly are all disposed in the housing; The dual input shafts are drivingly connected to the dual servo drive motor assemblies respectively; The shift paddle assembly is drivingly connected to the hydraulic shift drive assembly; The two speed change gears are arranged on the main shaft; The dual input shaft drives the main shaft to rotate through the two speed change gears; The hydraulic shift drive assembly drives the shift paddle assembly to switch the two speed gears to achieve large and small speed ratio transmission of the main shaft.

6. The top drive system according to claim 4, It is characterized in that The lifting ring mechanism comprises: a swing frame cylinder assembly, a swing frame assembly, a connecting rod assembly and a lifting ring assembly; The swing frame cylinder assembly is arranged on the cantilever part; The swing frame assembly is hinged on the outer wall of the gearbox; The driving end of the swing frame cylinder assembly is hinged to the swing frame assembly; The two ends of the connecting rod assembly are respectively connected to the end of the swing frame assembly and the lifting ring assembly; A drill pipe elevator of a top drive is arranged at the bottom of the lifting ring assembly; The swing frame oil cylinder assembly can drive the swing frame assembly to swing freely with the hinge of the gearbox as a fixed point; When the swing frame assembly swings, it can synchronously drive the lifting ring assembly to swing through the connecting rod assembly, and synchronously drive the lifting card to swing to a predetermined position, so as to load and unload the drill pipe to the predetermined position.

7. The top drive system according to claim 3, It is characterized in that The gooseneck support unit comprises: a lower connecting flange, a welded pipe, an upper connecting flange, a connecting pipe and a mud pipe; The lower connecting flange is fixedly arranged at the bottom end of the welded pipe; The upper connecting flange is fixedly arranged at the top end of the welded pipe; One end of the connecting pipe is arranged on the side wall of the welded pipe; The other end of the connecting pipe is connected to the mud pipe; The mud pipe is communicated with the welding pipe by means of the connecting pipe.

8. The top drive system according to claim 7, It is characterized in that The upper connecting flange is connected to the sampling pipeline; When the replaceable flushing tube is of small diameter: The replaceable upper sealing unit further comprises: an upper transition plate; The replaceable flushing pipe is connected to the gooseneck bracket unit by means of the upper transition plate; The replaceable lower sealing unit further comprises: a lower transition plate; The replaceable flushing tube is connected to the main shaft of the gearbox by means of the lower transition plate.

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