CN107165601B

CN107165601B - Drill rod dead clamp and control method thereof

Info

Publication number: CN107165601B
Application number: CN201710572818.4A
Authority: CN
Inventors: 陈伦俊; 池振华; 卢伟
Original assignee: Chengdu Zhuoxin Industry Co ltd
Current assignee: Chengdu Zhuoxin Industry Co ltd
Priority date: 2017-07-14
Filing date: 2017-07-14
Publication date: 2023-03-24
Anticipated expiration: 2037-07-14
Also published as: CN107165601A

Abstract

The invention relates to a drilling rod clamping device for preventing blowout during oil and gas field drilling, in particular to a drilling rod clamping device and a control method thereof. The device comprises a dead card assembly I and a dead card assembly II, wherein one end of the dead card assembly I is hinged with one end of the dead card assembly II; one end of the dead-stop assembly I is fixedly connected with the locking device, and the other end of the dead-stop assembly I is hinged with the dead-stop assembly II; one end of the dead clamp assembly II is hinged with the dead clamp assembly I, and the other end of the dead clamp assembly II is a movable end; the locking device comprises a locking device body and a sliding part capable of sliding along the locking device body, and a groove for placing the movable end of the dead clip assembly II is formed between the sliding part and the locking device body. According to the invention, the card locking assembly I is fixedly connected with the locking device, the locking device is arranged in a push-pull type structure, and the locking and unlocking of the card locking assembly II are completed through the push-pull sliding part, so that the card locking assembly and the locking device are integrated, the installation and the disassembly can be completed only by once hoisting, and the installation and the disassembly are very convenient.

Description

Drill rod dead clamp and control method thereof

Technical Field

The invention relates to a drilling rod dead clamp device for preventing blowout in oil and gas field drilling, in particular to a drilling rod dead clamp and a control method thereof.

Background

In the field of development and exploration of oil and gas fields, when drilling construction personnel acquire various pressure oil and gas reservoirs, the bottom hole pressure exerts a great acting force which pushes the drilling fluid and the drilling tool outwards. A kick or blowout occurs when the bottom hole pressure is greater than the counterbalance force applied by the driller. The wellhead is then provided with a dedicated blowout preventer to prevent the fluid in the well from being blown out from the surface of the drilling tool, while the drilling tools generally have internal blowout preventers to prevent the fluid in the well from being blown up from the bore of the drilling tool. But then the pressure in the well will continue to rise and the drilling tool will behave as a pressurized hydraulic cylinder piston rod moving upwards. At the moment, if no measures are taken, the blowout preventer is easy to damage, a drilling tool with the length of thousands of meters can be completely ejected out of a well head to cause blowout of an oil-gas well, the life safety of related personnel can be seriously threatened, and huge economic loss is brought. At present, most drill pipe dead blocks are locked by hydraulic pressure, but the traditional hydraulic control system has the following defects:

1. the control system is complex, the operating system is provided with 4 operating handles, and the operating steps are complicated;

2. the reversing valve is adopted to close the hydraulic cylinder under pressure, and the hydraulic cylinder leaks pressure due to the fact that the reversing valve cannot be effectively sealed, and operation failure is finally caused;

3. the system returns oil to the hydraulic power station, and hydraulic unloading is incomplete due to the opening pressure of the oil return check valve of the hydraulic power station, so that the piston spring cannot push back the piston, and the drill rod is stuck and cannot be unlocked.

The invention discloses a drill rod dead clamp which is provided with an authorized announcement number of CN204591201U and an authorized announcement date of 2015.08.26, and comprises a dead clamp body, wherein the dead clamp body is formed by splicing two or more dead clamp assemblies, and the drill rod dead clamp is characterized in that: one end of the dead-stop assembly is hinged together, and the other end of the dead-stop assembly is connected with a hydraulic locking device.

The drill rod is clamped in a manner that the hydraulic locking device and the clamping component are connected in a split mode, the clamping component is required to be sleeved on a drilling tool firstly when the drilling tool is installed, the clamping component is compressed, then the hydraulic locking device is lifted to the position of the clamping component through a lifting appliance, and the clamping component is sleeved into a groove of the hydraulic locking device. Because the hydraulic locking device and the dead-stop assembly are heavy, the installation and the disassembly are completed by more manpower and lifting appliances, and inevitable troubles are brought to the installation and the disassembly.

Disclosure of Invention

The invention aims to provide a drill rod dead clamp and a control method thereof, which are simple in structure, convenient to maintain and simple to operate.

In order to achieve the purpose, the invention adopts the technical scheme that:

a drill rod dead clamp comprises a dead clamp assembly I and a dead clamp assembly II, wherein one end of the dead clamp assembly I is hinged with one end of the dead clamp assembly II; one end of the dead-stop assembly I is fixedly connected with the locking device, and the other end of the dead-stop assembly I is hinged with the dead-stop assembly II; one end of the dead clamp assembly II is hinged with the dead clamp assembly I, and the other end of the dead clamp assembly II is a movable end; the locking device comprises a locking device body and a sliding part capable of sliding along the locking device body, and a groove for placing the movable end of the dead-stop assembly II is formed between the sliding part and the locking device body.

The locking device body is provided with a C-shaped groove corresponding to the sliding part in size, and the sliding part is arranged in the C-shaped groove; the side walls of the upper end and the lower end of the C-shaped groove are provided with sliding grooves, sliding blocks corresponding to the sliding grooves are arranged at positions corresponding to the sliding portions, and the sliding blocks are arranged in the sliding grooves.

The sliding part comprises a mechanical locking mechanism, the mechanical locking mechanism comprises a stud and a screw hole, the stud is arranged in the screw hole, the outer wall of the stud is provided with threads matched with the screw hole, and the screw hole is arranged in the sliding part; the screw hole is communicated with the groove; the mechanical locking mechanism is driven by a hydraulic motor, the hydraulic motor comprises a driving shaft, and the driving shaft drives the stud to move in the screw hole.

The sliding part is also provided with a hydraulic cylinder, a piston and a spring are arranged in the hydraulic cylinder, the spring is arranged between the piston and the hydraulic cylinder, a hydraulic oil groove is formed between the hydraulic cylinder and the piston, and the hydraulic oil groove is communicated with a hydraulic inlet and a hydraulic outlet.

Be provided with stopper I and stopper II on the spout, be provided with on the slider with stopper I and stopper II corresponding spacing groove, be provided with spacing roof beam on the spacing groove between stopper I and the stopper II.

A handle II is arranged on the sliding part; and a handle I is arranged on the dead-stop assembly II.

The end part of the stud close to the driving shaft is provided with a shaft hole and a groove, the shaft hole and the groove are both arranged along the axial direction of the stud, and the groove is arranged on one side of the shaft hole; the end part of the driving shaft is fixedly provided with a transmission key, the end part of the driving shaft is arranged in the shaft hole, and the transmission key is arranged in the groove.

And a sealing block is also arranged in the hydraulic cylinder, and a hydraulic oil groove is formed between the sealing block and the piston.

Two hydraulic cylinders are arranged, and hydraulic oil grooves in the two hydraulic cylinders are connected through holes; the hydraulic inlet and outlet are single and arranged on the sealing block; and sealing elements are arranged between the piston and the hydraulic cylinder and between the sealing block and the hydraulic cylinder.

A hydraulic inlet and outlet on the hydraulic cylinder are respectively connected with a one-way valve I and a one-way valve II, one end of the one-way valve I is connected with a hydraulic source, and the other end of the one-way valve I is respectively connected with the hydraulic cylinder and the one-way valve II; one end of the check valve II is connected with the oil storage device II, and the other end of the check valve II is connected with the check valve I and the hydraulic cylinder respectively.

The hydraulic source is also connected with a three-position four-way valve, and the three-position four-way valve is respectively connected with the hydraulic source, the hydraulic motor and the oil storage device I.

The three-position four-way valve is characterized in that the one-way valve I, the one-way valve II and the three-position four-way valve are all arranged in the cabinet, the one-way valve I and the one-way valve II are controlled through an operating rod II, and the three-position four-way valve is controlled through an operating rod I.

An oil inlet of the check valve I is connected with a hydraulic source, and an oil outlet of the check valve I is respectively connected with a hydraulic cylinder and an oil inlet of the check valve II; and an oil inlet of the check valve II is respectively connected with an oil outlet of the check valve I and the hydraulic cylinder, and the oil outlet is connected with an oil storage device II.

The oil inlet of three-position four-way valve is connected with the hydraulic source, the oil return port is connected with the oil storage device I, the working oil port I is connected with the liquid inlet of the hydraulic motor, and the working oil port II is connected with the liquid outlet of the hydraulic motor.

The control ports of the one-way valve I and the one-way valve II are arranged in opposite directions, the operating rod II is arranged between the one-way valve I and the one-way valve II, and the bottom of the operating rod II is connected with the control ends of the one-way valve I and the one-way valve II respectively.

And a control groove is formed in the control cabinet panel, the operating rod II penetrates through the control groove, and the bottom of the operating rod II is connected with the control cabinet through a linear bearing.

And the machine cabinet is also provided with a pressure gauge, and the pressure gauge is connected with an oil inlet of the hydraulic cylinder.

A control system for drill pipe dead stop comprises the following steps:

A. opening a locking device, opening the dead clamp assembly I and the dead clamp assembly II around a hinge point, sleeving the dead clamp assembly I and the dead clamp assembly II on a drill rod, closing the dead clamp assembly I and the dead clamp assembly II, and closing the locking device;

B. the hydraulic source is communicated with the hydraulic cylinder, hydraulic oil is filled into the hydraulic cylinder, the hydraulic oil pushes the piston to move towards the dead-lock assembly II, and the dead-lock assembly I and the dead-lock assembly II are locked;

C. hydraulic oil in a hydraulic source is filled into a hydraulic motor, the hydraulic motor is driven to rotate, the hydraulic motor drives a locking device to lock a dead clamp assembly I and a dead clamp assembly II, and after the stud completes the locking of the dead clamp assembly I and the dead clamp assembly II, the hydraulic motor is stopped from being filled with the hydraulic oil;

D. and releasing the hydraulic oil in the hydraulic cylinder to an oil storage device II.

When releasing the locking to the subassembly I that blocks with death and block II, include the following step:

E. the hydraulic source is communicated with the hydraulic cylinder, hydraulic oil is filled into the hydraulic cylinder, the hydraulic oil pushes the piston to move towards the dead-lock assembly II, and the dead-lock assembly I and the dead-lock assembly II are locked;

F. filling hydraulic oil in a hydraulic source into a hydraulic motor, driving the hydraulic motor to rotate reversely, releasing the locking of the locking device on the dead clamp assembly I and the dead clamp assembly II, and stopping filling the hydraulic motor with the hydraulic oil after releasing the locking is completed;

G. and releasing the hydraulic oil in the hydraulic cylinder to an oil storage device II.

In the step A, the locking device is opened in a mode that the sliding part slides leftwards, so that the purpose of opening the locking device can be achieved; the locking device is closed by sliding the sliding portion rightward, so that the locking device can be closed.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the dead-stop assembly I is fixedly connected with the locking device, the locking device is arranged to be of a push-pull type structure, and the locking and unlocking of the dead-stop assembly II are completed through the push-pull sliding part, so that the dead-stop assembly and the locking device are integrated, the installation and the disassembly can be completed only by once hoisting, and the installation and the disassembly are very convenient.

2. The arrangement of the limiting block I, the limiting block II and the limiting groove further limits the sliding block to move along a straight line, and meanwhile, the arrangement of the limiting beam between the limiting block I and the limiting block II can prevent the sliding part from sliding out of the sliding groove due to overlarge sliding distance, so that the stability and the safety of the sliding block are improved. When the locking device is opened, the limit beam moves to the limit block I and then is blocked by the limit block I, so that the sliding part can be prevented from sliding out of the sliding groove; when the locking device is closed, the limit beam moves to the limit block II and then is blocked by the limit block II, so that the sliding part can be prevented from sliding out of the sliding groove.

3. Set up handle II and handle I on sliding part and the card subassembly II that dies respectively, make things convenient for opening of sliding part and the card subassembly II that dies.

4. In the process of drilling tool work, the assembly I and the assembly II are locked through a mechanical locking mode, hydraulic oil does not need to be led into all the time to keep the assembly I and the assembly II locked, safety and stability are improved, and meanwhile, the assembly is simple and convenient to install and use on site.

5. The mode through rotatory double-screw bolt will be blocked subassembly I and II locking of the card that die, can realize not needing to maintain the operation of the card that dies for locking means provides power again at the in-process of drilling tool work.

6. Because flammable and explosive gas exists in a drilling site, the drilling site is safer by adopting the hydraulic motor. The hydraulic cylinder and the hydraulic cylinder adopt the same power, other power sources are not required to be added, and the equipment is convenient to install. The hydraulic motor has large torque, and can obtain larger torque without increasing a speed reducer, so that the equipment is simple. Meanwhile, the hydraulic motor is continuously cooled by hydraulic oil during operation, and the overheating risk is avoided.

7. The hydraulic motor drives the driving shaft to rotate, the transmission key rotates along with the driving shaft, meanwhile, the transmission key drives the stud to rotate, the stud can move forwards or backwards in the screw hole in the rotating process, the transmission key slides in the groove in the stud shaft hole in the moving forward or backwards process, and the stud moves forwards or backwards under the condition that the driving shaft and the transmission key are kept static relative to the locking device. The driving force of the driving shaft is transmitted to the stud through the transmission key, the position of the hydraulic motor can be kept unchanged, the driving shaft of the hydraulic motor is also directly connected with the stud, the driving shaft of the hydraulic motor is prevented from directly bearing the axial force of the stud, and the stud is prevented from damaging the hydraulic motor while the locking effect of the locking device is ensured.

8. When the drill rod is used, the sliding part is pulled out along the sliding groove, the dead clamp assembly II is opened along the hinged point, the dead clamp assembly I and the dead clamp assembly II are sleeved on the drill rod, the dead clamp assembly I and the dead clamp assembly II are closed, and the sliding part is pushed in along the sliding groove. And hydraulic oil is introduced into the hydraulic cylinder, a piston in the hydraulic cylinder compresses the dead clamp assembly II, then the stud is driven by the hydraulic motor to rotate in the screw hole, the dead clamp assembly I and the dead clamp assembly II are locked, and hydraulic pressure in the hydraulic cylinder is released after the stud is locked. When the card that dies is got off to needs, let in hydraulic oil in the hydraulic cylinder earlier, let the piston in the hydraulic cylinder compress tightly the subassembly II that dies, then rethread hydraulic motor drive double-screw bolt counter-rotation in the screw, the cancellation is to the locking of subassembly I that dies and subassembly II that dies, treats that double-screw bolt counter-rotation accomplishes the back, releases the hydraulic pressure in the hydraulic cylinder. By introducing hydraulic oil, the power required to be provided by the hydraulic motor in the locking and opening process of the driving stud is reduced, the power of the hydraulic motor is reduced, and energy is saved. Meanwhile, the stud is more convenient to lock and open.

9. Through the setting of check valve I and check valve II, when needs provide pressure for the hydraulic cylinder, hydraulic oil passes through I flow in hydraulic cylinder of check valve, when the hydraulic cylinder pressure of needs blowdown, and hydraulic oil passes through II flows of check valve to the oil storage device II. Opening and closing of the one-way valve I and the one-way valve II are controlled through the operating rod II, and operation is simple and convenient. Hydraulic oil is controlled through the check valve I and the check valve II, hydraulic oil cannot leak, and the stability of pressure in the hydraulic cylinder can be guaranteed. Because the oil storage device II is not closed, when the pressure in the hydraulic cylinder is released, the oil outlet of the one-way valve II is directly contacted with air, the pressure in the hydraulic cylinder can be completely released, the piston is smoothly rebounded, and the dead block is effectively unlocked.

10. The hydraulic motor is controlled by the three-position four-way valve, so that the forward rotation and the reverse rotation of the hydraulic motor can be realized, and the operation is very simple.

11. Check valve I and check valve II are controlled by control rod II, and the three-position four-way valve is controlled by control rod I, makes this system accomplish whole locking and unblock operation and only need can accomplish through control rod I control and control rod II, makes the operation simpler, lets operating personnel can be skilled in mastering operation method in very short time.

12. The setting of manometer can let operating personnel know the size of hydraulic cylinder internal pressure definitely, makes things convenient for operating personnel to carry out hydraulic control.

13. The control method is simple to operate, can be complete only by operating the two operating levers, and meanwhile, the gears of the operating levers are preset, so that an operator only needs to operate according to a fixed gear sequence, and the control method is simple and easy to learn, and can ensure that accidents such as misoperation and the like can not occur in the operating process.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a perspective view of the present invention with the deadbolt assembly open;

FIG. 3 is a perspective view of the invention with the deadbolt assembly open (slide not shown);

FIG. 4 is an enlarged view of the sliding part structure of the present invention;

FIG. 5 is an enlarged sectional view of the sliding portion;

FIG. 6 is an enlarged top view of the stud structure;

FIG. 7 is a hydraulic control topology of the present invention;

FIG. 8 is a schematic diagram of the structure of the control cabinet of the present invention;

FIG. 9 is a schematic diagram showing the positional relationship of the operating lever II with the check valve I and the check valve II according to the present invention.

The labels in the figure are: 1. a card-fixing component I; 2. a locking device; 3. a sealing block; 4. a mechanical locking mechanism; 5. a drive shaft; 6. a drive key; 7. a stud; 8. a through hole; 9. a seal member; 10. a piston; 11. a spring; 12. a hydraulic oil tank; 13. a shaft hole; 14. a groove; 15. a screw hole; 16. a hydraulic cylinder; 17. a hydraulic inlet and outlet; 18. a groove; 19. a chute; 20. a limiting block I; 21. a limiting block II; 23. a handle I; 24. a handle II; 25. a slider; 26. a limiting groove; 27. a limiting beam; 28. a card-fixing component II; 29. a locking device body; 30. a sliding part; 101. a hydraulic source; 102. a one-way valve I; 103. a pressure gauge; 104. an oil storage device I; 105. a hydraulic motor; 106. a one-way valve II; 107. an oil storage device II; 108. a three-position four-way valve; 109. a control lever I; 110. an operating lever II; 111. a control cabinet; 112. a control slot; 113. and a linear bearing.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements that are referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the embodiment discloses a drill pipe dead clamp and a control method thereof, and the embodiment includes:

a drill rod dead clamp comprises a dead clamp assembly I1 and a dead clamp assembly II 28, wherein one end of the dead clamp assembly I1 is hinged with one end of the dead clamp assembly II 28; one end of the dead-stop assembly I1 is fixedly connected with the locking device 2, and the other end of the dead-stop assembly I is hinged with the dead-stop assembly II 28; one end of the dead clamp assembly II 28 is hinged with the dead clamp assembly I1, and the other end of the dead clamp assembly II is a movable end; the locking device 2 comprises a locking device body 29 and a sliding part 30 capable of sliding along the locking device body 29, wherein a groove 18 for placing the movable end of the dead card assembly II 28 is formed between the sliding part 30 and the locking device body 29.

The locking device body 29 is provided with a C-shaped groove corresponding to the sliding part 30 in size, and the sliding part 30 is arranged in the C-shaped groove; the side walls of the upper end and the lower end of the C-shaped groove are respectively provided with a sliding groove 19, the position corresponding to the sliding part 30 is provided with a sliding block 25 corresponding to the sliding groove 19, and the sliding block 25 is arranged in the sliding groove 19.

The sliding part 30 comprises a mechanical locking mechanism 4, the mechanical locking mechanism 4 comprises a stud 7 and a screw hole 15, the stud 7 is arranged in the screw hole 15, the outer wall of the stud 7 is provided with a thread matched with the screw hole 15, and the screw hole 15 is arranged in the sliding part 2; the screw hole 7 is communicated with the groove 18; the mechanical locking mechanism 4 is driven by a hydraulic motor 105, the hydraulic motor 105 comprising a drive shaft 5, the drive shaft 5 driving the stud 7 in the threaded hole 15.

The sliding part 30 is further provided with a hydraulic cylinder 16, a piston 10 and a spring 11 are arranged in the hydraulic cylinder 16, the spring 11 is arranged between the piston 10 and the hydraulic cylinder 16, a hydraulic oil groove 12 is formed between the hydraulic cylinder 16 and the piston, and the hydraulic oil groove 12 is communicated with a hydraulic inlet and outlet 17.

A limiting block I20 and a limiting block II 21 are arranged on the sliding groove 19, a limiting groove 26 corresponding to the limiting block I20 and the limiting block II 21 is arranged on the sliding block 25, and a limiting beam 27 is arranged on the limiting groove 26 between the limiting block I20 and the limiting block II 21.

The sliding part 30 is provided with a handle II 24; and a handle I23 is arranged on the dead-lock assembly II 28.

The end part of the stud 7 close to the driving shaft 5 is provided with a shaft hole 13 and a groove 14, the shaft hole 13 and the groove 14 are both arranged along the axial direction of the stud 7, and the groove 14 is arranged on one side of the shaft hole 13; the end of the driving shaft 5 is fixedly provided with a transmission key 6, the end of the driving shaft 5 is arranged in the shaft hole 13, and the transmission key 6 is arranged in the groove 14.

And a sealing block 3 is also arranged in the hydraulic cylinder 16, and a hydraulic oil tank 12 is formed between the sealing block 3 and the piston 10.

Two hydraulic cylinders 16 are arranged, and hydraulic oil grooves 12 in the two hydraulic cylinders 16 are connected through holes 8; the hydraulic inlet and outlet 17 is single and is arranged on the sealing block 3; and a sealing element 9 is arranged between the piston 10 and the sealing block 3 and the hydraulic cylinder 16.

A hydraulic inlet and outlet 17 on the hydraulic cylinder 16 is respectively connected with a one-way valve I102 and a one-way valve II 106, one end of the one-way valve I102 is connected with a hydraulic source 101, and the other end of the one-way valve I102 is respectively connected with the hydraulic cylinder 16 and the one-way valve II 106; the check valve II 106 is connected to the oil storage device II 107 at one end and is connected to the check valve I102 and the hydraulic cylinder 16 at the other end.

The hydraulic source 101 is further connected with a three-position four-way valve 108, and the three-position four-way valve 108 is respectively connected with the hydraulic source 101, the hydraulic motor 105 and the oil storage device I104.

The check valve I102, the check valve II 106 and the three-position four-way valve 108 are all arranged in a cabinet 111, the check valve I102 and the check valve II 106 are controlled through an operating lever II 110, and the three-position four-way valve 108 is controlled through an operating lever I109.

An oil inlet of the check valve I102 is connected with a hydraulic source 101, and an oil outlet of the check valve I is respectively connected with oil inlets of the hydraulic cylinder 16 and the check valve II 106; and an oil inlet of the check valve II 106 is respectively connected with an oil outlet of the check valve I102 and the hydraulic cylinder 16, and an oil outlet is connected with an oil storage device II 107.

An oil inlet of the three-position four-way valve 108 is connected with the hydraulic source 101, an oil return port is connected with the oil storage device I104, a working oil port I is connected with a liquid inlet of the hydraulic motor 105, and a working oil port II is connected with a liquid outlet of the hydraulic motor 105.

The control ports of the one-way valve I102 and the one-way valve II 106 are arranged oppositely, the operating lever II 110 is arranged between the one-way valve I102 and the one-way valve II 106, and the bottom of the operating lever II 110 is connected with the control ends of the one-way valve I102 and the one-way valve II 106 respectively.

A control groove 112 is formed in the panel of the control cabinet 111, the operating lever II 110 penetrates through the control groove 112, and the bottom of the operating lever II is connected with the control cabinet 111 through a linear bearing 113.

The cabinet 111 is further provided with a pressure gauge 103, and the pressure gauge 103 is connected with an oil inlet of the hydraulic cylinder 16.

When the operating lever I109 is in the 0 gear, the oil inlet and the oil return port of the three-position four-way valve 108 are closed, and the working oil port I and the working oil port II are closed.

When the operating lever I109 is in the 1-gear position, an oil inlet of the three-position four-way valve 108 is communicated with the working oil port II, and the working oil port I is communicated with the oil return port.

When the operating lever I109 is in the 2-gear position, an oil inlet of the three-position four-way valve 108 is communicated with the working oil port I, and the working oil port II is communicated with the oil return port.

When the operating lever II 110 is in the 3-gear position, the check valve 102I and the check valve II 106 are both in a closed state.

When the operating lever II 110 is in the 4-gear position, the check valve II 106 is closed, and the check valve 102I is opened.

When the operating lever II 110 is in the 5 th gear, the check valve 102I is closed, and the check valve II 106 is opened.

A control system for drill pipe dead stop comprises the following steps:

A. opening the locking device 2, opening the dead clamp assembly I1 and the dead clamp assembly II 28 around a hinge point, sleeving the dead clamp assembly I1 and the dead clamp assembly II 28 on a drill rod, closing the dead clamp assembly I1 and the dead clamp assembly II 28, and closing the locking device 2;

B. the hydraulic source 101 is communicated with the hydraulic cylinder 16, hydraulic oil is filled into the hydraulic cylinder 16, the piston 10 is pushed by the hydraulic oil to move towards the second dead-blocking assembly 28, and the first dead-blocking assembly 1 and the second dead-blocking assembly 28 are locked;

C. hydraulic oil in a hydraulic source 101 is filled into a hydraulic motor 105, the hydraulic motor 105 is driven to rotate, the hydraulic motor 105 drives a locking device 2 to lock a dead bolt assembly I1 and a dead bolt assembly II 28, and after the stud 7 completes the locking of the dead bolt assembly I1 and the dead bolt assembly II 28, the hydraulic motor 105 is stopped from being filled with the hydraulic oil;

D. the hydraulic oil in the hydraulic cylinder 16 is discharged to the oil storage device ii 107.

When the locking of the dead-lock assembly I1 and the dead-lock assembly II 28 is released, the method comprises the following steps:

E. the hydraulic source 101 is communicated with the hydraulic cylinder 16, hydraulic oil is filled into the hydraulic cylinder 16, the hydraulic oil pushes the piston 10 to move towards the dead-lock assembly II 28, and the dead-lock assembly I1 and the dead-lock assembly II 28 are locked;

F. filling hydraulic oil in a hydraulic source 101 into a hydraulic motor 105, driving the hydraulic motor 105 to rotate reversely, releasing the locking of the locking device 2 on the I1 and II 28 dead-lock components, and stopping filling the hydraulic motor 105 with the hydraulic oil after the locking is released;

G. the hydraulic oil in the hydraulic cylinder 16 is discharged to the oil storage device ii 107.

In the step a, the locking device 2 is opened by sliding the sliding part 30 leftward, so that the locking device 2 can be opened; the locking device 2 is closed by sliding the sliding portion 30 rightward, and the purpose of closing the locking device 2 is achieved.

According to the invention, the card locking assembly I1 is fixedly connected with the locking device 2, the locking device 2 is arranged in a push-pull type structure, and the locking and unlocking of the card locking assembly II 28 are completed through the push-pull sliding part 30, so that the card locking assembly and the locking device 2 are integrated, the installation and the disassembly can be completed only by once hoisting, and the installation and the disassembly are very convenient.

The arrangement of the limiting block I20, the limiting block II 21 and the limiting groove 26 further limits the linear motion of the sliding block 19, and meanwhile, the arrangement of the limiting beam 27 between the limiting block I20 and the limiting block II 21 can prevent the sliding part 30 from sliding out of the sliding groove 19 due to an overlarge sliding distance, so that the stability and the safety of the sliding block are improved. When the locking device 2 is opened, the limit beam 27 is stopped by the limit block I20 after moving to the limit block I20, so that the sliding part 30 can be prevented from sliding out of the sliding groove 19; when the locking device 2 is closed, the limit beam 27 is stopped by the limit block II 21 after moving to the limit block II 21, so that the sliding part 30 can be prevented from sliding out of the sliding groove 19.

And a handle II 24 and a handle I23 are respectively arranged on the sliding part 30 and the dead-stop assembly II 28, so that the sliding part 30 and the dead-stop assembly II 28 can be conveniently opened.

In the working process of the drilling tool, the I1 and II 28 dead-stop assemblies are locked in a mechanical locking mode, hydraulic oil does not need to be led into all the time to keep the I1 and II 28 dead-stop assemblies locked, safety and stability are improved, and meanwhile, the field installation and the use are simple and convenient.

The I1 and II 28 of the dead-stop assembly are locked by rotating the stud 7, so that the dead-stop operation can be maintained without providing power for the locking device 2 in the working process of the drilling tool.

Because the drilling site has flammable and explosive gas, the hydraulic motor is adopted to ensure that the drilling site is safer. The same power as the hydraulic cylinder 16 is adopted, other power sources are not required to be added, and the equipment is convenient to install. The hydraulic motor has large torque, and can obtain larger torque without increasing a speed reducer, so that the equipment is simple. Meanwhile, the hydraulic motor is continuously cooled by hydraulic oil during operation, and no overheating risk exists.

The hydraulic motor drives the driving shaft 5 to rotate, meanwhile, the transmission key 6 rotates along with the driving shaft 5, meanwhile, the transmission key 6 drives the stud 7 to rotate, the stud 7 can move forwards or backwards in the screw hole 15 in the rotating process, the transmission key 6 slides in the groove 14 in the shaft hole 13 of the stud 7 in the moving forward or backwards process of the stud 7, and the stud 7 moves forwards or backwards under the condition that the positions of the driving shaft 5 and the transmission key 6 are kept static relative to the locking device 2. The driving force of the driving shaft 5 is transmitted to the stud 7 through the transmission key 6, the position of the hydraulic motor can be kept unchanged, meanwhile, the driving shaft 5 of the hydraulic motor is also not directly connected with the stud 7, the driving shaft 5 of the hydraulic motor is prevented from directly bearing the axial force of the stud 7, and the stud 7 is prevented from damaging the hydraulic motor while the locking effect of the locking device 2 is ensured.

When the drill rod locking mechanism is used, the sliding part 30 is firstly pulled out along the sliding groove 19, the dead clamp assembly II 28 is opened along a hinged point, the dead clamp assembly I1 and the dead clamp assembly II 28 are sleeved on a drill rod, the dead clamp assembly I1 and the dead clamp assembly II 28 are closed, and the sliding part 30 is pushed in along the sliding groove 19. Hydraulic oil is introduced into the hydraulic cylinder 16, the piston 10 in the hydraulic cylinder 16 presses the second dead bolt assembly 28 tightly, then the stud 7 is driven by the hydraulic motor to rotate in the screw hole 15, the first dead bolt assembly 1 and the second dead bolt assembly 28 are locked, and after the stud 7 is locked, hydraulic pressure in the hydraulic cylinder 16 is released. When the dead bolt needs to be taken down, hydraulic oil is firstly introduced into the hydraulic cylinder 16, the piston in the hydraulic cylinder 16 compresses the dead bolt assembly II 28, then the stud 7 is driven by the hydraulic motor to rotate reversely in the screw hole 15, locking of the dead bolt assembly I1 and the dead bolt assembly II 28 is cancelled, and hydraulic pressure in the hydraulic cylinder 16 is released after the stud 7 rotates reversely. By introducing hydraulic oil, the power required to be provided by the hydraulic motor in the locking and opening processes of the driving stud 7 is reduced, the power of the hydraulic motor is reduced, and energy is saved. And meanwhile, the stud 7 is more convenient to lock and unlock.

Through the arrangement of the check valve I102 and the check valve II 106, when pressure needs to be supplied to the hydraulic cylinder 16, hydraulic oil flows into the hydraulic cylinder 16 through the check valve I102, and when the pressure of the hydraulic cylinder 16 needs to be relieved, the hydraulic oil flows out to the oil storage device II 107 through the check valve II 106. The opening and closing of the check valve I102 and the check valve II 106 are controlled through an operating rod II 110, and the operation is simple and convenient. The hydraulic oil is controlled through the check valve I102 and the check valve II 106, the hydraulic oil cannot leak, and the pressure in the hydraulic cylinder 16 can be guaranteed to be stable. Because the oil storage device II 107 is not sealed, when the pressure in the hydraulic cylinder 16 is released, the oil outlet of the one-way valve II 106 is directly contacted with air, so that the pressure in the hydraulic cylinder 16 can be completely released, the piston 10 is smoothly rebounded, and the locking is effectively unlocked.

By controlling the hydraulic motor 105 by the three-position four-way valve 108, the forward rotation and the reverse rotation of the hydraulic motor 105 can be realized, and the operation is very simple. The one-way valve I102 and the one-way valve II 106 are controlled by an operating lever II 110, and the three-position four-way valve 108 is controlled by an operating lever I109, so that the system can complete the whole locking and unlocking operation only by controlling the operating lever I109 and the operating lever II 110, the operation is simpler, and an operator can master the operation method in a short time. The pressure gauge 103 can make the operator know the pressure in the hydraulic cylinder 16 clearly, which is convenient for the operator to control the hydraulic pressure.

The control method is simple to operate, can be complete only by operating the two operating levers, simultaneously, the gears of the operating levers are preset, and an operator only needs to operate according to a fixed gear sequence, so that the control method is simple and easy to learn, and can ensure that accidents such as misoperation and the like can not occur in the operation process.

Example 2

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the embodiment discloses a drill rod fixing clamp, which includes:

a drill rod dead clamp comprises a dead clamp assembly I1 and a dead clamp assembly II 28, wherein one end of the dead clamp assembly I1 is hinged with one end of the dead clamp assembly II 28; one end of the dead-stop assembly I1 is fixedly connected with the locking device 2, and the other end of the dead-stop assembly I1 is hinged with the dead-stop assembly II 28; one end of the dead clamp assembly II 28 is hinged with the dead clamp assembly I1, and the other end of the dead clamp assembly II is a movable end; the locking device 2 comprises a locking device body 29 and a sliding part 30 capable of sliding along the locking device body 29, and a groove 18 for placing the movable end of the dead-lock assembly II 28 is arranged between the sliding part 30 and the locking device body 29.

Example 3

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 2, except that:

Example 4

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 3, except that:

Example 5

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 4, except that:

Example 6

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 5, except that:

be provided with stopper I20 and stopper II 21 on the spout 19, be provided with on the slider 25 with stopper I20 and stopper II 21's corresponding spacing groove 26, be provided with spacing roof beam 27 on the spacing groove 26 between stopper I20 and the stopper II 21.

Example 7

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 6, except that:

Example 8

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 7, except that:

Example 9

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 8, except that:

Example 10

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the present embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 9, except that:

Example 11

Example 12

Referring to the accompanying drawings 1 to 7, this embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 11 except that:

Example 13

Referring to the accompanying drawings 1 to 7, this embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 12 except that:

Example 14

Referring to the accompanying drawings 1 to 7, this embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 13 except that:

Example 15

Example 16

Referring to the accompanying drawings 1 to 7, this embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 15 except that:

Example 17

Referring to the accompanying drawings 1 to 7, this embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 16 except that:

the panel of the control cabinet 111 is provided with a control groove 112, the operating lever II 110 penetrates through the control groove 112, and the bottom of the operating lever II is connected with the control cabinet 111 through a linear bearing 113.

Example 18

Referring to the accompanying drawings 1 to 7, this embodiment discloses a drill rod fixing clamp, which is substantially the same as embodiment 17 except that:

Example 19

As a preferred embodiment of the present invention, referring to fig. 1 to 7 of the specification, the embodiment discloses a control method for drill pipe dead stop, and the embodiment includes:

a control system for drill pipe dead stop comprises the following steps:

A. opening the locking device 2, opening the dead-stop assembly I1 and the dead-stop assembly II 28 around a hinge point, sleeving the drill rod, closing the dead-stop assembly I1 and the dead-stop assembly II 28, and closing the locking device 2;

B. the hydraulic source 101 is communicated with the hydraulic cylinder 16, hydraulic oil is filled into the hydraulic cylinder 16, the hydraulic oil pushes the piston 10 to move towards the dead-lock assembly II 28, and the dead-lock assembly I1 and the dead-lock assembly II 28 are locked;

Example 20

Referring to the accompanying drawings 1 to 7, this embodiment discloses a control method for drill pipe dead jamming, which is substantially the same as embodiment 19 except that:

E. the hydraulic source 101 is communicated with the hydraulic cylinder 16, hydraulic oil is filled into the hydraulic cylinder 16, the piston 10 is pushed by the hydraulic oil to move towards the second dead-blocking assembly 28, and the first dead-blocking assembly 1 and the second dead-blocking assembly 28 are locked;

Example 21

Example 22

Referring to fig. 1 to 7 of the drawings, this embodiment discloses a method for controlling drill pipe stuck in a drill pipe, which is substantially the same as embodiment 20, except that:

when the dead block needs to be locked, the operating rod I109 is controlled to be adjusted to the 0 position, the oil inlet and the oil return port of the three-position four-way valve 108 are closed at the moment, and the working oil port I and the working oil port II are closed. And (3) adjusting the operating lever II 110 to 4, opening the one-way valve 102I at the moment, closing the one-way valve II 106, filling hydraulic oil in the hydraulic source 101 into the hydraulic cylinder 16, adjusting the operating lever II 110 to 3 when the pressure gauge 103 indicates that the pressure in the hydraulic cylinder 16 reaches a preset value, wherein the one-way valve 102I and the one-way valve II 106 are both in a closed state, and the pressure in the hydraulic cylinder 16 is kept stable. Transfer control rod I109 to 1 shelves, the oil inlet and the work hydraulic fluid port II switch-on of three-position four-way valve 108 this moment, work hydraulic fluid port I and oil return opening switch-on, hydraulic oil flows out from hydraulic pressure source 101, loop through the oil inlet of three-position four-way valve 108, work hydraulic fluid port II, the liquid outlet of hydraulic motor 105, the inlet of hydraulic motor 105, the work hydraulic fluid port I of three-position four-way valve 108 and the oil return opening of three-position four-way valve 108, flow into in oil storage device I104, thereby let hydraulic motor 105 rotate, drive double-screw bolt 7 is in 15 internal rotations of screw, will die card subassembly I1 and the locking of card subassembly II 28.

After the locking is completed, the operating rod I109 is adjusted to the 0 gear, the oil inlet and the oil return port of the three-position four-way valve 108 are closed at the moment, and the working oil port I and the working oil port II are closed. When the operating lever II 110 is shifted to 5, the check valve 102I is closed, the check valve II 106 is opened, and the hydraulic oil in the hydraulic cylinder 16 flows into the oil storage device II 107 through the check valve II 106, so that the pressure in the hydraulic cylinder 16 is released. After the pressure relief is completed, the operating lever II 110 is adjusted to 3, and the check valve 102I and the check valve II 106 are both in a closed state.

Example 22

As a preferred embodiment of the present invention, referring to fig. 1 to fig. 7 in the specification, this embodiment discloses a method for controlling drill rod stuck, which is substantially the same as embodiment 20, except that:

when the dead block needs to be unlocked, the operating rod I109 is controlled to be adjusted to the 0 gear, the oil inlet and the oil return port of the three-position four-way valve 108 are closed, and the working oil port I and the working oil port II are closed. And (3) adjusting the operating lever II 110 to 4 th gear, opening the check valve 102I at the moment, closing the check valve II 106, filling hydraulic oil in the hydraulic source 101 into the hydraulic cylinder 16, adjusting the operating lever II 110 to 3 rd gear when the pressure gauge 103 indicates that the pressure in the hydraulic cylinder 16 reaches a preset value, wherein the check valve 102I and the check valve II 106 are both in a closed state at the moment, and the pressure in the hydraulic cylinder 16 keeps stable. Transfer control rod I109 to 2 grades, the oil inlet and the I switch-on of work hydraulic fluid port of three-position four-way valve 108 this moment, work hydraulic fluid port II and oil return opening switch-on, hydraulic oil flows out from hydraulic pressure source 101, loop through the oil inlet of three-position four-way valve 108, the work hydraulic fluid port I of three-position four-way valve 108, the inlet of hydraulic motor 105, the liquid outlet of hydraulic motor 105, the work hydraulic fluid port II of three-position four-way valve 108 and the oil return opening of three-position four-way valve 108, flow into in oil storage device I104, thereby let hydraulic motor 105 reversal, drive double-screw bolt 7 is reverse rotation in screw 15, the locking of card subassembly I1 and card subassembly II 28 that dies is relieved.

After the locking is removed, the operating rod I109 is adjusted to the 0 gear, the oil inlet and the oil return port of the three-position four-way valve 108 are closed, and the working oil port I and the working oil port II are closed. When the operating lever II 110 is shifted to 5, the check valve 102I is closed, the check valve II 106 is opened, and the hydraulic oil in the hydraulic cylinder 16 flows into the oil storage device II 107 through the check valve II 106, so that the pressure in the hydraulic cylinder 16 is released. After the pressure relief is completed, the operating lever II 110 is adjusted to 3, and the check valve 102I and the check valve II 106 are both in a closed state.

When the operating rod I109 is in the 0-gear position, the oil inlet and the oil return port of the three-position four-way valve 108 are closed, and the working oil port I and the working oil port II are closed.

When the operating lever II 110 is in the 3-gear position, the check valve 102I and the check valve II 106 are in a closed state.

The gear name of the joystick i 109 described in the above embodiments is not completely unchanged from the open or closed state of the three-position four-way valve 108, and those skilled in the art can name the open or closed state of the three-position four-way valve 108 by using other gear names, which also belongs to the protection scope of the present invention.

The gear names of the operating lever ii 110 in the above embodiments are not completely the same as the opening or closing states of the check valve i 102 and the check valve ii 106, and those skilled in the art can name the opening or closing states of the check valve i 102 and the check valve ii 106 by using other gear names, which also falls into the protection scope of the present invention.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which all belong to the protection scope of the present application.

Claims

1. A drill pipe dead clamp is characterized in that: the device comprises a dead card assembly I (1) and a dead card assembly II (28), wherein one end of the dead card assembly I (1) is hinged with one end of the dead card assembly II (28); one end of the dead-stop assembly I (1) is fixedly connected with the locking device (2), and the other end of the dead-stop assembly I is hinged with the dead-stop assembly II (28); one end of the dead clamp assembly II (28) is hinged with the dead clamp assembly I (1), and the other end of the dead clamp assembly II is a movable end; the locking device (2) comprises a locking device body (29) and a sliding part (30) capable of sliding along the locking device body (29), and a groove body (18) for placing the movable end of the dead clip assembly II (28) is arranged between the sliding part (30) and the locking device body (29);

the locking device body (29) is provided with a C-shaped groove corresponding to the sliding part (30) in size, and the sliding part (30) is arranged in the C-shaped groove; the side walls of the upper end and the lower end of the C-shaped groove are respectively provided with a sliding groove (19), the position corresponding to the sliding part (30) is provided with a sliding block (25) corresponding to the sliding groove (19), and the sliding block (25) is arranged in the sliding groove (19);

the sliding part (30) comprises a mechanical locking mechanism (4), the mechanical locking mechanism (4) comprises a stud (7) and a screw hole (15), the stud (7) is arranged in the screw hole (15), the outer wall of the stud (7) is provided with threads matched with the screw hole (15), and the screw hole (15) is arranged in the sliding part (30); the screw hole (15) is communicated with the groove body (18); the mechanical locking mechanism (4) is driven by a hydraulic motor (105), the hydraulic motor (105) comprises a driving shaft (5), and the driving shaft (5) drives the stud (7) to move in the screw hole (15);

the sliding part (30) is further provided with a hydraulic cylinder (16), a piston (10) and a spring (11) are arranged in the hydraulic cylinder (16), the spring (11) is arranged between the piston (10) and the hydraulic cylinder (16), a hydraulic oil groove (12) is formed between the hydraulic cylinder (16) and the piston, and the hydraulic oil groove (12) is communicated with a hydraulic inlet and outlet (17).

2. The drill pipe dead stop collar as recited in claim 1, further comprising: a hydraulic inlet and outlet (17) on the hydraulic cylinder (16) is respectively connected with a one-way valve I (102) and a one-way valve II (106), one end of the one-way valve I (102) is connected with a hydraulic source (101), and the other end of the one-way valve I (102) is respectively connected with the hydraulic cylinder (16) and the one-way valve II (106); one end of the one-way valve II (106) is connected with the oil storage device II (107), and the other end of the one-way valve II is respectively connected with the one-way valve I (102) and the hydraulic cylinder (16).

3. The drill pipe dead stop collar as recited in claim 2, wherein: the hydraulic source (101) is further connected with a three-position four-way valve (108), and the three-position four-way valve (108) is respectively connected with the hydraulic source (101), the hydraulic motor (105) and the oil storage device I (104).

4. The drill pipe dead stop collar as recited in claim 3, wherein: the check valve I (102), the check valve II (106) and the three-position four-way valve (108) are all arranged in the cabinet (111), the check valve I (102) and the check valve II (106) are controlled through an operating lever II (110), and the three-position four-way valve (108) is controlled through an operating lever I (109).

5. A control method for drill pipe stuck control according to claim 4, comprising the steps of:

A. opening the locking device (2), opening the dead clamp assembly I (1) and the dead clamp assembly II (28) around a hinge point, sleeving the dead clamp assembly I (1) and the dead clamp assembly II (28) on a drill rod, closing the dead clamp assembly I (1) and the dead clamp assembly II (28), and closing the locking device (2);

B. the hydraulic source (101) is communicated with the hydraulic cylinder (16), hydraulic oil is filled into the hydraulic cylinder (16), the hydraulic oil pushes the piston (10) to move towards the dead-lock assembly II (28), and the dead-lock assembly I (1) and the dead-lock assembly II (28) are locked;

C. hydraulic oil in a hydraulic source (101) is filled into a hydraulic motor (105), the hydraulic motor (105) is driven to rotate, the hydraulic motor (105) drives a locking device (2) to lock a dead bolt assembly I (1) and a dead bolt assembly II (28), and after a stud (7) completes the locking of the dead bolt assembly I (1) and the dead bolt assembly II (28), the hydraulic motor (105) is stopped from being filled with the hydraulic oil;

D. and discharging the hydraulic oil in the hydraulic cylinder (16) to an oil storage device II (107).

6. The drill pipe stuck control method according to claim 5, characterized in that when the stuck component I (1) and the stuck component II (28) are unlocked, the method comprises the following steps:

E. the hydraulic source (101) is communicated with the hydraulic cylinder (16), hydraulic oil is filled into the hydraulic cylinder (16), the hydraulic oil pushes the piston (10) to move towards the dead-lock assembly II (28), and the dead-lock assembly I (1) and the dead-lock assembly II (28) are locked;

F. hydraulic oil in a hydraulic source (101) is filled into a hydraulic motor (105), the hydraulic motor (105) is driven to rotate reversely, the locking of the locking device (2) on the dead clamp assembly I (1) and the dead clamp assembly II (28) is released, and after the locking is released, the hydraulic motor (105) is stopped being filled with the hydraulic oil;

G. and discharging the hydraulic oil in the hydraulic cylinder (16) to an oil storage device II (107).

7. The control method of drill pipe stuck according to claim 5, characterized in that: in the step A, the locking device (2) is opened by sliding the sliding part (30) leftwards, so that the purpose of opening the locking device (2) can be achieved; the locking device (2) is closed by sliding the sliding part (30) to the right, so that the locking device (2) can be closed.