CN116427862B

CN116427862B - Device for quickly replacing drilling core barrel in sea area drilling and working method

Info

Publication number: CN116427862B
Application number: CN202310671851.8A
Authority: CN
Inventors: 周长祥; 孙雨沁; 牛志力; 于立栋; 张晨西; 徐珺
Original assignee: SHANDONG GEOLOGICAL SCIENCES INSTITUTE
Current assignee: SHANDONG GEOLOGICAL SCIENCES INSTITUTE
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2023-09-05
Anticipated expiration: 2043-06-08
Also published as: CN116427862A

Abstract

The invention relates to the technical field of ocean bottom rock drilling equipment, and particularly discloses a device for quickly replacing a drilling core barrel in sea area drilling and a working method thereof, wherein the device comprises a drilling mechanism, a core barrel lifting mechanism and a core barrel replacing operation platform; the core changing operation platform is arranged on the seabed surface, two core changing manipulators and two groups of core barrel dismounting mechanisms are arranged on the core changing operation platform, the core barrel is held by the core changing manipulators to rotate for dismounting or mounting, and the core barrel dismounting mechanisms dismount or mount the core barrel to the core barrel lifting mechanism; according to the invention, the core barrel can be replaced more quickly, the replaced core barrel is directly conveyed to the barge, the integrity and accuracy of samples are ensured, then a new core barrel is conveyed downwards for standby, the core barrel replacement efficiency is high, and the overall drilling efficiency is high; simple structure, convenient operation through seabed camera visual operation.

Description

Device for quickly replacing drilling core barrel in sea area drilling and working method

Technical Field

The invention relates to the technical field of ocean bottom rock drilling equipment, in particular to a device for quickly replacing a drilling core barrel in sea area drilling and a working method.

Background

A core barrel refers to a section of tubing attached to the upper portion of a drill bit during core drilling to contain and protect the core. During each drilling operation, it is necessary to withdraw the core barrel from the borehole and then remove the core from the core barrel. The existing operation method is that steel wires and joints are stretched into the sleeve rod of a drill rod, a core barrel is lifted out, then a new core barrel is stretched into the bottom by the same operation method, and the new core barrel is replaced. The method needs to be completed step by step to detach and lift the old core barrel, then lowers and installs the new core barrel, has lower operation efficiency, and particularly has the disadvantage that the whole drill rod is longer due to the depth of sea water and the depth of the seabed needing to be drilled downwards when in submarine exploration operation, and the mode is extremely time-consuming. In order to improve efficiency, there is also a central control type submarine multi-head continuous sampling drilling machine disclosed in patent application number 202111257800.8, a storage bin type structure is adopted, a plurality of core tubes can be simultaneously contained, the core tubes are stored and replaced, drilling efficiency and core replacement efficiency are improved, but the whole structure is complex, the core tubes are stored on the seabed and cannot be transported up in time, and the accuracy of samples can be influenced. Therefore, a device and a working method for quickly replacing a drilling core barrel in sea area drilling are needed to solve the problems that the core barrel replacement efficiency is low and the core barrel is not transported timely.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a device for quickly replacing a drilling core barrel in sea area drilling and a working method thereof.

The technical scheme adopted for solving the technical problems is as follows: the device comprises a drilling mechanism, a core barrel lifting mechanism and a core barrel changing operation platform, wherein the drilling mechanism and the core barrel lifting mechanism are arranged on a barge, the core barrel lifting mechanism is provided with two groups, and the core barrel lifting mechanism lifts and conveys the core barrel upwards and downwards;

the core changing operation platform is arranged on the seabed surface, two core changing manipulators and two groups of core barrel dismounting mechanisms are arranged on the core changing operation platform, the core barrel is held by the core changing manipulators to rotate for dismounting or mounting, and the core barrel dismounting mechanisms dismount or mount the core barrel to the core barrel lifting mechanism.

Specifically, the drilling mechanism comprises a drilling machine, a drill rod, a core barrel and a drill bit, wherein the drilling machine is arranged on a barge, a plurality of sections of drill rods are arranged below the drilling machine, the lower part of the drill rod is connected with the core barrel, and the lower part of the core barrel is connected with the drill bit.

Specifically, the core barrel lifting mechanism is provided with a first winch, a second winch and two steel wire stabilizing frames, wherein the first winch is provided with a first steel wire, the second winch is provided with a second steel wire, the bottoms of the first steel wire and the second steel wire are connected with bearings, the bearings are rotatably arranged on a core barrel fixing cover, and a toothed ring is fixed on the periphery of the lower portion of the core barrel fixing cover.

Specifically, the steel wire stabilizer is fixed in the bottom of barge, installs a plurality of steel wire stabilizers on the steel wire stabilizer, and the steel wire stabilizer is equipped with two stabilizer motors and two steel wire arm clamps, and stabilizer motor drive steel wire arm clamps swing, and after steel wire one or steel wire two passed the steel wire stabilizer, the outside of steel wire one or steel wire two is spacing at steel wire one's drive steel wire arm clamps cover, and the steel wire arm clamps inboard is equipped with the roller.

Specifically, trade heart operation platform includes annular skeleton, vertical support and electric putter, and annular skeleton and vertical support form drum type frame construction, electric putter is installed to vertical support's bottom, and electric putter's bottom mounting support board, backup pad support on the seabed face.

Specifically, locator, spirit level and camera are still installed on the trade heart operation platform, and the spirit level discerns trade heart operation platform's levelness and adjusts whole level through electric putter.

Specifically, trade heart manipulator is equipped with two that distribute from top to bottom, trade heart manipulator includes arm, railcar and centre gripping arm, swing motor is connected to arm one end, and swing motor control arm swing, and swing motor rotates and installs on the railcar, and the wheel of railcar is spacing in annular track to be removed, and annular track installs in trading heart operation platform inboard, is equipped with driving motor in the railcar, and driving motor drive railcar moves along annular track, and two centre gripping motors are installed to the other end of arm, and centre gripping motor connects the centre gripping arm, and the centre gripping motor control is opened and shut of two centre gripping arms and is pressed from both sides tight core barrel.

Specifically, core tube dismouting mechanism installs on the crossbeam, the crossbeam is fixed in the inboard upper portion of trading heart operation platform, core tube dismouting mechanism is equipped with clamping block one, clamping block two and reverse screw rod, reverse screw rod passes through the bearing frame and rotates and install in the crossbeam bottom, screw motor is connected to reverse screw rod's one end, screw motor drive reverse screw rod rotates, clamping block one and clamping block two upper portions all are equipped with the screw seat, the screw seat silk connects on reverse screw rod, reverse screw rod rotates the relative or the opposite movement of control clamping block one and clamping block two, be used for clamping block one and clamping block two to press from both sides tight or loosen core tube fixed cover, clamping block one and clamping block two's lower part all are equipped with the dismouting motor, the motor shaft connecting gear of dismouting motor, the outside toothed ring of gear engagement connection core tube fixed cover, the rotatory dismantlement of dismouting motor control core tube fixed cover or installation core tube.

Specifically, a drill bit clamp is arranged at the lower part of the core-changing operation platform, the drill bit clamp adopts a clamp motor to drive a drill bit clamp arm, and the clamp motor controls the drill bit clamp arm to swing to clamp a drill bit.

The working method of the device for quickly replacing the drilling core barrel in sea area drilling comprises the following steps:

1) Setting up a drilling machine on a barge, wherein a drill rod and a drill bit of the drilling machine extend to the seabed surface, a core-changing operation platform is arranged on the periphery of the drill rod, a winch I and a winch II are arranged beside the drilling machine, and a steel wire stabilizer are arranged at the bottom of the barge;

2) When the core tube needs to be replaced, a new core tube is connected to the core tube fixing cover of the winch I, the winch I and the winch II move downwards simultaneously, the steel wire clamping arm of the steel wire stabilizer clamps the steel wire I and the steel wire II, and the steel wire I and the steel wire II with the new core tube fall to the upper part of the core replacing operation platform;

3) The drilling machine controls the old core barrel and the drill bit to rise to the core changing operation platform, the drill bit clamp clamps the drill bit inwards, the swing motors of the two core changing manipulators control the mechanical arms to move to point to the direction of the old core barrel, the clamping motors control the clamping arms to clamp the old core barrel, the two core changing manipulators clamp the old core barrel, the driving motors drive the railcar to move along the same direction to drive the old core barrel to rotate, and the old core barrel is disassembled;

4) Then, the steel wire I and the steel wire II continuously descend into the core exchanging operation platform, the core exchanging manipulator at the lower part loosens the old core barrel, the swing motor and the driving motor drive the clamping arm to move to the new core barrel, the clamping motor drives the clamping arm to clamp the new core barrel, and the core exchanging manipulator at the upper part clamps the old core barrel and moves to the core barrel fixing cover of the steel wire II through the swing motor and the driving motor;

5) The two screw motors work simultaneously to drive the two groups of clamping blocks I and clamping blocks II to clamp the core barrel fixing cover on the steel wire I and the steel wire II respectively, gears of the clamping blocks I and the clamping blocks II are meshed with toothed rings on the core barrel fixing cover, the dismounting motor controls the gears to rotate to drive the toothed rings to rotate and the core barrel fixing cover to rotate, so that a new core barrel on the steel wire I is dismounted and clamped by a core changing manipulator at the lower part, an old core barrel is screwed on the steel wire II, the clamping blocks I and the clamping blocks II are loosened to two sides, the steel wire II drives the old core barrel to ascend to a barge, and the new core barrel is lowered;

6) The center-changing manipulator at the lower part drives the new core barrel to return to the center position, the center-changing manipulator at the upper part also grasps the new core barrel, the rail car is driven by the driving motor to reversely rotate, the new core barrel is arranged between the drill rod and the drill bit, the two center-changing manipulators swing to one side, the drill bit clamp is loosened, and new drilling work is started.

The invention has the following beneficial effects:

when the device and the working method for quickly replacing the drilling core barrel in sea area drilling are used for replacing the core barrel, the new core barrel stands by, so that the core barrel can be replaced more quickly, the replaced core barrel is directly conveyed to a barge, the integrity and accuracy of samples are ensured, and then the new core barrel is conveyed downwards to stand by, so that the core barrel replacement efficiency is high, and the overall drilling efficiency is high; the whole structure is simple, the operation is convenient, and the designed steel wire stabilizer enables the vertical transportation of the core barrel to be more stable through the visual operation of the submarine camera.

Drawings

Fig. 1 is a schematic diagram of a device for quickly replacing a drilling core barrel in sea area drilling.

Fig. 2 is a second schematic structural view of the device for quickly replacing a drilling core barrel in sea area drilling.

Fig. 3 is a top view of the heart changing operation platform.

Fig. 4 is a schematic structural view of the core barrel attaching and detaching mechanism.

Fig. 5 is a side view of the core barrel assembly and disassembly mechanism.

Fig. 6 is a schematic structural view of the combined state of the wire stabilizers.

Fig. 7 is a schematic view of the structure of the opened state of the wire stabilizer.

In the figure: 1-drilling mechanism, 1.1-drilling machine, 1.2-drill rod, 1.3-core barrel and 1.4-drill bit;

2-core tube lifting mechanism, 2.1-winch I, 2.2-winch II, 2.3-wire I, 2.4-wire II, 2.5-wire stabilizer, 2.6-wire stabilizer, 2.7-stabilizer motor, 2.8-core tube fixing cover, 2.9-toothed ring, 2.10-bearing and 2.11-wire clamp arm;

3-core changing operation platform, 3.1-annular framework, 3.2-vertical support and 3.3-electric push rod;

the device comprises a 4-core changing manipulator, a 4.1-mechanical arm, a 4.2-annular track, a 4.3-railcar, a 4.4-swing motor, a 4.5-clamping arm and a 4.6-clamping motor;

the device comprises a 5-core barrel dismounting mechanism, a 5.1-cross beam, a 5.2-clamping block I, a 5.3-clamping block II, a 5.4-reverse screw, a 5.5-nut seat, a 5.6-screw motor, a 5.7-dismounting motor, a 5.8-gear and a 5.9-bearing seat;

6-barge; 7-sea level; 8-sea bed surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described in further detail below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-7, a device for quickly replacing a drilling core barrel in sea area drilling comprises a drilling mechanism 1, a core barrel lifting mechanism 2, a core barrel replacing operation platform 3, a core barrel replacing manipulator 4 and a core barrel dismounting mechanism 5, wherein the drilling mechanism 1 and the core barrel lifting mechanism 2 are arranged on a barge 6, the core barrel lifting mechanism 2 is provided with two groups, and the core barrel lifting mechanism 2 lifts and lowers the core barrel 1.3.

The core changing operation platform 3 is arranged on the seabed surface 8, two core changing manipulators 4 and two groups of core barrel dismounting mechanisms 5 are arranged on the core changing operation platform 3, the core barrel 1.3 is held by the core changing manipulators 4 to rotate for dismounting or mounting, and the core barrel dismounting mechanisms 5 dismount or mount the core barrel 1.3 on a core barrel fixing cover 2.8 of the core barrel lifting mechanism 2.

The drilling mechanism 1 comprises a drilling machine 1.1, a drill rod 1.2, a core barrel 1.3 and a drill bit 1.4, wherein the drilling machine 1.1 is arranged on a barge 6, a plurality of sections of drill rods 1.2 are arranged below the drilling machine 1.1, the lower part of the drill rod 1.2 is connected with the core barrel 1.3, and the lower part of the core barrel 1.3 is connected with the drill bit 1.4.

The core barrel lifting mechanism 2 is provided with a first winch 2.1, a second winch 2.2, a first steel wire 2.3, a second steel wire 2.4 and two steel wire stabilizing frames 2.5, the first winch 2.1 is provided with the first steel wire 2.3, the second winch 2.2 is provided with the second steel wire 2.4, the bottoms of the first steel wire 2.3 and the second steel wire 2.4 are connected with a bearing 2.10, the bearing 2.10 is rotatably arranged on a core barrel fixing cover 2.8, and a toothed ring 2.9 is fixed on the periphery of the lower part of the core barrel fixing cover 2.8.

The steel wire stabilizer 2.5 is fixed at the bottom of the barge 6, a plurality of steel wire stabilizers 2.6 are arranged on the steel wire stabilizer 2.5, the steel wire stabilizers 2.6 are provided with two stabilizer motors 2.7 and two steel wire clamping arms 2.11, roll shafts are arranged on the inner sides of the steel wire clamping arms 2.11, the steel wire moves smoothly, the stabilizer motors 2.7 drive the steel wire clamping arms 2.11 to swing, and after the steel wire I2.3 or the steel wire II 2.4 passes through the steel wire stabilizer 2.5, the stabilizer motors 2.7 drive the steel wire clamping arms 2.11 to be sleeved outside the steel wire I2.3 or the steel wire II 2.4 for limiting. In order to increase the stability of the steel wire and avoid the influence of ocean currents, a thin steel rod is used as a stabilizing frame within 100m below the ocean surface, a rope stabilizing mechanical gripper is used as a stabilizer stabilizing rope, when the core barrel 1.3 is conveyed down, the steel wire stabilizer 2.6 limits the position of the steel wire, the self weight of the steel wire and the core barrel 1.3 well reaches the corresponding position, and the core barrel replacing mechanical hand 4 accurately grabs the steel wire. When the core barrel 1.3 is sent up, the steel wire stabilizer 2.6 is opened at 180 degrees, and the core barrel 1.3 can be smoothly sent to the operation surface of the barge 6.

The core-changing operation platform 3 comprises an annular framework 3.1, a vertical support 3.2 and an electric push rod 3.3, wherein the annular framework 3.1 and the vertical support 3.2 form a cylindrical frame structure, the electric push rod 3.3 is installed at the bottom of the vertical support 3.2, a supporting plate is installed at the bottom of the electric push rod 3.3, and the supporting plate is supported on a seabed surface 8. The heart-changing operation platform 3 is also provided with a locator, a level gauge and a camera, the seabed camera realizes the visualization of seabed operation, the level gauge recognizes the levelness of the heart-changing operation platform 3 and adjusts the whole level through the electric push rod 3.3, and the whole mechanism base has a horizontal plane adjusting function.

The core changing manipulator 4 is provided with two vertically distributed core changing manipulators, each core changing manipulator 4 comprises a mechanical arm 4.1, an annular track 4.2, a rail car 4.3, a swinging motor 4.4, a clamping arm 4.5 and a clamping motor 4.6, one end of each mechanical arm 4.1 is connected with the swinging motor 4.4, the swinging motor 4.4 controls the mechanical arms 4.1 to swing, the swinging motor 4.4 is rotatably mounted on the rail car 4.3, wheels of the rail car 4.3 move in the annular track 4.2 in a limiting mode, the annular track 4.2 is mounted on the inner side of the core changing operation platform 3, a driving motor is arranged in the rail car 4.3 and drives the rail car 4.3 to move along the annular track 4.2, the other end of each mechanical arm 4.1 is provided with two clamping motors 4.6, the clamping motors 4.6 are connected with the clamping arms 4.5, and the clamping motors 4.6 control the opening and closing of the two clamping arms 4.5 to clamp the core barrel 1.3.

The core barrel dismounting mechanism 5 is mounted on the cross beam 5.1, the cross beam 5.1 is fixed on the upper portion of the inner side of the core barrel replacing operation platform 3, the core barrel dismounting mechanism 5 is provided with a clamping block I5.2, a clamping block II 5.3 and a reverse screw 5.4, the reverse screw 5.4 is rotatably mounted at the bottom of the cross beam 5.1 through a bearing seat 5.9, one end of the reverse screw 5.4 is connected with a screw motor 5.6, the screw motor 5.6 drives the reverse screw 5.4 to rotate, screw bases 5.5 are arranged on the upper portions of the clamping block I5.2 and the clamping block II 5.3, the screw bases 5.5 are connected with the reverse screw 5.4 in a threaded mode, the reverse screw 5.4 rotates to control the relative or opposite movement of the clamping block I5.2 and the clamping block II 5.3, the core barrel is used for clamping or loosening a core barrel fixing cover 2.8 through the clamping block I5.2 and the clamping block II.3, a dismounting motor 5.7 is arranged on the lower portion of the clamping block I5.2 and the clamping block II.3, a motor shaft of the dismounting motor 5.7 is connected with a gear 5.8, and a gear 5.8 is connected with the motor shaft of the gear 5.8, and the core barrel 2.8 is rotatably mounted on the outer side of the core barrel 2.8, and the core barrel is rotatably mounted and fixedly mounted on the core barrel 2.8.

The lower part of the core-changing operation platform 3 is provided with a drill bit clamp, the drill bit clamp adopts a clamp motor to drive a drill bit clamp arm, and the clamp motor controls the drill bit clamp arm to swing to clamp a drill bit.

1) Setting up a drilling machine 1.1 on a barge 6, wherein a drill rod 1.2 and a drill bit 1.4 of the drilling machine 1.1 extend to a seabed surface 8, a core-changing operation platform 3 is arranged on the seabed surface 8 and on the periphery of the drill rod 1.2, a winch I2.1 and a winch II 2.2 are arranged beside the drilling machine 1.1, and a steel wire stabilizer 2.5 and a steel wire stabilizer 2.6 are arranged at the bottom of the barge 6;

2) When the core tube 1.3 needs to be replaced, a new core tube is connected to the core tube fixing cover 2.8 of the winch I2.1 in a wire mode, the winch I2.1 and the winch II 2.2 move downwards simultaneously, the steel wire clamping arm 2.11 of the steel wire stabilizer 2.6 clamps the steel wire I2.3 and the steel wire II 2.4, and the steel wire I2.3 and the steel wire II 2.4 with the new core tube fall to the upper portion of the core replacing operation platform 3;

3) The drilling machine 1.1 controls the old core barrel and the drill bit 1.4 to rise to the center changing operation platform 3, the drill bit clamp clamps the drill bit 1.4 inwards, the swinging motors 4.4 of the two center changing manipulators 4 control the mechanical arms 4.1 to move to point to the direction of the old core barrel, the clamping motors 4.6 control the clamping arms 4.5 to clamp the old core barrel, the two center changing manipulators 4 clamp the old core barrel, the driving motor drives the railcar 4.3 to move in the same direction to drive the old core barrel to rotate, and the old core barrel is disassembled;

4) Then, the steel wire I2.3 and the steel wire II 2.4 continuously descend into the core changing operation platform 3, the core changing manipulator 4 at the lower part loosens the old core barrel, the swing motor 4.4 and the driving motor drive the clamping arm 4.5 to move to the new core barrel, the clamping motor 4.6 drives the clamping arm 4.5 to clamp the new core barrel, and the core changing manipulator 4 at the upper part clamps the old core barrel and moves to the core barrel fixing cover 2.8 of the steel wire II 2.4 through the swing motor 4.4 and the driving motor;

5) The two screw motors 5.6 work simultaneously to drive the two groups of clamping blocks I5.2 and II 5.3 to clamp the core barrel fixing cover 2.8 on the steel wire I2.3 and the steel wire II 2.4 respectively, the gears 5.8 of the clamping blocks I5.2 and II 5.3 are meshed with the toothed ring 2.9 on the core barrel fixing cover 2.8, the dismounting motor 5.7 controls the gears 2.8 to rotate to drive the toothed ring 2.9 to rotate and the core barrel fixing cover 2.8 to rotate, so that a new core barrel on the steel wire I2.3 is dismounted and clamped by the lower core changing manipulator 4, the old core barrel is screwed on the steel wire II 2.4, the clamping blocks I5.2 and II 5.3 are loosened to two sides, the steel wire II 2.4 drives the old core barrel to rise to the barge 6, and the new core barrel is lowered to be brought back to the new core barrel;

6) The lower core changing manipulator 4 drives the new core barrel to return to the center position, the upper core changing manipulator 4 also grasps the new core barrel, the driving motor drives the railcar 4.3 to reversely rotate, the new core barrel is arranged between the drill rod 1.2 and the drill bit 1.4, the two core changing manipulators 4 swing to one side, the drill bit clamp is loosened, and new drilling work is started.

The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions.

The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.

Claims

1. The device for quickly replacing the drilling core barrel in sea area drilling is characterized by comprising a drilling mechanism, a core barrel lifting mechanism and a core barrel replacing operation platform, wherein the drilling mechanism and the core barrel lifting mechanism are arranged on a barge;

the core tube lifting mechanism is provided with two groups, the core tube lifting mechanism lifts and conveys the core tube, the core tube lifting mechanism is provided with a first winch, a second winch and two steel wire stabilizing frames, the first winch is provided with a first steel wire, the second winch is provided with a second steel wire, the bottoms of the first steel wire and the second steel wire are connected with bearings, the bearings are rotatably arranged on a core tube fixing cover, and a toothed ring is fixed on the periphery of the lower part of the core tube fixing cover;

the heart-changing operation platform is arranged on the seabed surface and comprises an annular framework, a vertical support and an electric push rod, wherein the annular framework and the vertical support form a cylindrical frame structure, the electric push rod is arranged at the bottom of the vertical support, a supporting plate is arranged at the bottom of the electric push rod, and the supporting plate is supported on the seabed surface;

the core changing operation platform is provided with two core changing manipulators and two groups of core changing operation platform dismounting mechanisms, the core changing manipulators hold the core changing tubes to rotate for dismounting or mounting, the core changing tube dismounting mechanisms dismount or mount the core changing tubes to the core changing tube lifting mechanisms, the core changing tube dismounting mechanisms are mounted on the cross beam, the cross beam is fixed on the upper inner side of the core changing operation platform, the core changing tube dismounting mechanisms are provided with a clamping block I, a clamping block II and a reverse screw rod, the reverse screw rod is rotatably mounted on the bottom of the cross beam through a bearing seat, one end of the reverse screw rod is connected with a screw rod motor, the screw rod motor drives the reverse screw rod to rotate, screw bases are respectively arranged on the upper parts of the clamping block I and the clamping block II, the screw bases are connected to the reverse screw rod, the reverse screw rod rotates to control the relative or opposite movement of the clamping block I and the clamping block II, the lower parts of the clamping block I and the clamping block II are used for clamping or loosening the core changing tube fixing cover, the dismounting motors are respectively arranged on the lower parts of the clamping block I and the clamping block II, motor shaft connecting gears of the dismounting motors are meshed with a toothed ring outside the core changing tube fixing cover, and the dismounting motors control the core changing tube fixing cover to detach or mount the core changing tubes.

2. The device for quickly replacing a drilling core barrel for sea area drilling according to claim 1, wherein the steel wire stabilizer is fixed at the bottom of the barge, a plurality of steel wire stabilizers are arranged on the steel wire stabilizer, the steel wire stabilizers are provided with two stabilizer motors and two steel wire clamping arms, the stabilizer motors drive the steel wire clamping arms to swing, after the steel wire I or the steel wire II passes through the steel wire stabilizer, the stabilizer motors drive the steel wire clamping arms to be sleeved outside the steel wire I or the steel wire II for limiting, and a roll shaft is arranged on the inner side of the steel wire clamping arms.

3. The device for quickly replacing a drilling core barrel for sea area drilling according to claim 1, wherein a positioner, a level gauge and a camera are further installed on the core replacement operation platform, and the level gauge recognizes the levelness of the core replacement operation platform and adjusts the overall level through an electric push rod.

4. The device for quickly replacing a drilling core barrel for sea area drilling according to claim 1, wherein the core replacing manipulator is provided with two vertically distributed core replacing manipulators, each core replacing manipulator comprises a manipulator, a rail car and a clamping arm, one end of each manipulator is connected with a swinging motor, each swinging motor controls the manipulator to swing, the swinging motors are rotatably mounted on the rail car, wheels of the rail car move in a limiting mode in an annular track, the annular track is mounted on the inner side of a core replacing operation platform, a driving motor is arranged in the rail car, the driving motor drives the rail car to move along the annular track, the other end of each manipulator is provided with two clamping motors, each clamping motor is connected with each clamping arm, and the clamping motors control opening and closing of the two clamping arms to clamp the core barrel.

5. The device for quickly replacing a drilling core barrel for sea area drilling according to claim 1, wherein a drill bit clamp is arranged at the lower part of the core replacement operation platform, the drill bit clamp adopts a clamp motor to drive a drill bit clamp arm, and the clamp motor controls the drill bit clamp arm to swing to clamp a drill bit.

6. A method of operating a device for quick retrieval of drilling core tubes for sea area drilling according to any one of claims 1-5, comprising the steps of: