A Hydraulic Dog Clutch Drill Pipe Hoisting Cap

Abstract

The present invention discloses a hydraulic lifting cap for a spline drill pipe, which comprises a support cylinder, a spline tooth sliding sleeve, a lifting device, a pole holding device, a rotary driving device, and a telescopic device. The spline tooth sliding sleeve is sleeved inside the support cylinder. The lifting device is connected to the spline tooth sliding sleeve. The pole holding device is fitted on the support cylinder. The rotary driving device is arranged on the support cylinder. The telescopic device is arranged inside the spline tooth sliding sleeve. The hydraulic lifting cap for a spline drill pipe according to the present invention solves the problem of the connection and disconnection of large spline drill pipes, and has the advantages of strong adaptability, compact structure, flexibility, and easy operation.

Description

Technical Field

[0001] The present invention relates to the technical field of large engineering drills, and particularly relates to a spline-type drill pipe hydraulic lifting cap. Background Art

[0002] Large engineering drills generally adopt a drilling process of using drill pipes to transmit power, slurry wall protection, and compressed air reverse circulation well washing. Since the spline-type drill pipe joints have a large load-bearing capacity, high reliability, and quick disassembly, more spline-type joint drill pipes are used in large engineering drills. However, with the increase in the capacity of the drills, the time taken for the connection and disconnection of the spline-type drill pipes using a crane for lifting and manual assistance is relatively long, resulting in low work efficiency and poor safety. Therefore, it is of great significance to develop a special hydraulic lifting cap for spline-type joint drill pipes with complete functions, strong adaptability, compact structure, and flexibility. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0004] To this end, an embodiment of the present invention provides a spline-type drill pipe lifting cap, which has a large driving power, strong adaptability, and flexibility, can solve the problems of disassembly and assembly of large spline-type drill pipes, and has simple operation and a compact structure.

[0005] The spline-type drill pipe hydraulic lifting cap according to an embodiment of the present invention includes a support cylinder, a spline tooth sliding sleeve, a lifting device, a pipe holding device, a rotary driving device, and a telescopic device.

[0006] A plurality of mutually spaced slides are provided on the outer wall of the support cylinder;

[0007] The spline tooth sliding sleeve is arranged in the support cylinder and is in sliding fit with the support cylinder, and can rotate relative to the support cylinder or move in the axial direction;

[0008] The lifting device includes a lifting cap head, a spline sliding sleeve guide post, a clamp, a positioning disk, a retaining ring, a flat key, and a snap ring. The upper end of the lifting cap head is connected to the hook of a crane. The lifting cap head is connected to the spline sliding sleeve guide post through the clamp. The spline sliding sleeve guide post is connected to the positioning disk through the flat key, and the flat key restricts the relative rotation between the spline sliding sleeve guide post and the positioning disk. The snap ring is used to restrict the axial movement between the spline sliding sleeve guide post and the positioning disk. At least a part of the spline sliding sleeve guide post is located in the spline tooth sliding sleeve and is in sliding fit with the spline tooth sliding sleeve;

[0009] There are multiple hoist pole devices, and each hoist pole device includes a jaw moving oil cylinder support, a jaw moving oil cylinder, a bushing, a jaw opening and closing oil cylinder, a jaw mounting seat, and a jaw. The jaw moving oil cylinder support is fixedly connected to the support cylinder. The cylinder end of the jaw moving oil cylinder is connected to the jaw moving oil cylinder support, and the piston rod end of the jaw moving oil cylinder is connected to the bushing. The bushing is connected to the top end of the jaw mounting seat. The cylinder end of the jaw opening and closing oil cylinder is rotatably connected to the bushing, and the piston rod end of the jaw opening and closing oil cylinder is connected to the jaw. The jaw is hinged to the bottom end of the jaw mounting seat, and the jaw can rotate relative to the jaw mounting seat. The jaw mounting seat is slidably fitted in the slideway of the support cylinder;

[0010] The slewing drive device is arranged on the support cylinder and is used to drive the jaw clutch sliding sleeve to rotate;

[0011] The telescopic device is arranged inside the jaw clutch sliding sleeve, and the telescopic device is used to drive the jaw clutch sliding sleeve to move axially relative to the support seat.

[0012] In some embodiments, the slewing drive device is a planetary gear reducer driven by a hydraulic motor, and includes a frame, an internal and external gear ring, an upper support sleeve, a sun gear, a hydraulic motor, a bearing seat ring, a gear ring, a planet carrier, a lower support sleeve, a positioning pin, and planet gears. The gear ring has an internal gear and an external gear. The frame is fixedly connected to the support cylinder. The two ends of the planet carrier are extended through the upper support sleeve and the lower support sleeve and are respectively supported in the holes of the upper box plate and the lower box plate of the frame. The bearing seat ring and the gear ring are fixedly connected respectively, and the bearing seat ring is supported at the two ends of the planet carrier through roller bearings respectively. The planet gears are respectively meshed with the internal gear, and the sun gear is meshed with the planet gears.

[0013] In some embodiments, the telescopic device includes an oil cylinder upper seat cover, a telescopic oil cylinder, and an oil cylinder lower seat cover. The oil cylinder upper seat cover is fixedly connected to the jaw sliding sleeve guide post. The oil cylinder lower seat cover is fixedly connected to the jaw clutch sliding sleeve. The oil cylinder upper seat cover and the oil cylinder lower seat cover are arranged at intervals. The telescopic oil cylinder is arranged between the oil cylinder upper seat cover and the oil cylinder lower seat cover and is respectively hinged to the oil cylinder upper seat cover and the oil cylinder lower seat cover. The telescopic oil cylinder can drive the jaw clutch sliding sleeve to reciprocate linearly in the support cylinder in the axial direction.

[0014] In some embodiments, a hydraulic system is further provided, and the movement control of the jaw moving oil cylinder, the jaw opening and closing oil cylinder, the telescopic oil cylinder, and the hydraulic motor is all realized by the hydraulic system.

[0015] Beneficial effects

[0016] According to the hydraulic lifting cap for spline drill pipe of the present invention, the lifting cap head is connected to the crane, and the jaws are in an open state. The jaw moving oil cylinder pushes the jaw mounting seat to move, so that the hydraulic lifting cap approaches the spline drill pipe until the distance is reached where the jaws can hook the external gear ring of the spline drill pipe. The jaws are locked at the external gear ring of the spline drill pipe by driving the jaw opening and closing oil cylinder. The telescopic oil cylinder drives the spline tooth sliding sleeve to move towards the spline drill pipe, and the spline tooth sliding sleeve is rotated to the position where the teeth on the spline tooth sliding sleeve mesh with the spline drill pipe by the rotary device. When the teeth of the spline tooth sliding sleeve 4 pass over the internal teeth of the drill pipe, the rotary drive device drives the spline tooth sliding sleeve to rotate an angle of one tooth width (22.5°). At this time, the hydraulic lifting cap and the lifted spline drill pipe are integrated, and the drill pipe can be hoisted to the wellhead by the crane. The hydraulic lifting cap for spline drill pipe of the present invention solves the problem of connection and disconnection of large spline drill pipes, and has the advantages of strong adaptability, compact structure, flexibility and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view of the hydraulic lifting cap for spline drill pipe according to the embodiment of the present invention;

[0018] Figure 2 is the left view of the hydraulic lifting cap for spline drill pipe according to the embodiment of the present invention;

[0019] Figure 3 is the enlarged view of the rotary device of the hydraulic lifting cap for spline drill pipe according to the embodiment of the present invention.

[0020] Reference numerals:

[0021] Lifting device 1; Mast device 2; Rotary drive device 3; Spline tooth sliding sleeve 4; Support cylinder 5; Telescopic device 6; Lifting cap head 7; Spline sliding sleeve guide post 8; Clamp 9; Positioning disk 10; Retaining ring 11; Flat key 12; Snap ring 13; Jaw moving oil cylinder support 14; Jaw moving oil cylinder 15; Liner seat 16; Jaw opening and closing oil cylinder 17; Jaw mounting seat 18; Jaw 19; Frame 20; Internal and external gear rings 21; Upper support sleeve 22; Sun gear 23; Hydraulic motor 24; Bearing seat ring 25; Gear ring 26; Planet carrier 27; Lower support sleeve 28; Positioning pin 29; Planet gear 30. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following detailed description of the specific embodiments of the present invention will be made with reference to the accompanying drawings.

[0023] As Figure 1 、 2 shown, to solve the above technical problems, the present invention adopts the following technical solutions: A hydraulic lifting cap for spline drill pipe includes a lifting device 1, a mast device 2, a rotary drive device 3, a spline tooth sliding sleeve 4, a support cylinder 5, a telescopic device 6, a hydraulic system and other parts.

[0024] As Figure 1, 2 As shown in the figure, the lifting device of the spline drill pipe hydraulic lifting cap includes components such as a lifting cap head 7, a spline sliding sleeve guide post 8, a clamp 9, a positioning disc 10, a retaining ring 11, a flat key 12, and a snap ring 13. The upper end of the lifting cap head 7 is directly connected to the pin shaft of the crane hook. The split clamp 9 connects the lifting cap head 7 and the spline sliding sleeve guide post 8 into one body through screws. The spline sliding sleeve guide post 8 is connected to the positioning disc 10 through a flat key 12 to restrict the relative rotation between the two. The axial movement between the spline sliding sleeve guide post 8 and the positioning disc 10 is restricted by the split snap ring 13.

[0025] As Figure 1 , 2 shown in the figure, the pipe holding device of the spline drill pipe hydraulic lifting cap includes components such as a jaw moving oil cylinder support 14, a jaw moving oil cylinder 15, a lining seat 16, a jaw opening and closing oil cylinder 17, a jaw mounting seat 18, and jaws 19. The jaw moving oil cylinder support 14 is fixed on the support cylinder 5 through screws and shear pins. The cylinder end of the jaw moving oil cylinder 15 is connected to the jaw moving oil cylinder support 14 through a pin shaft, and the piston rod end is connected to the large hole end of the lining seat 16 and the jaw mounting seat 18 through a pin shaft. The cylinder end of the jaw opening and closing oil cylinder 17 is connected to the small hole end of the lining seat 16 and the jaw mounting seat 18 through a pin shaft, and the piston rod end is connected to the jaws 19 through a pin shaft. The jaws 19 are hinged to the jaw mounting seat 18 through a pin shaft. A spline drill pipe hydraulic lifting cap includes a plurality of pipe holding devices 2. Each pipe holding device 2 is matched with the slideway on the support cylinder 5 through the slide groove on one side of the jaw mounting seat 18 to realize the telescopic movement with the support cylinder 5. When the piston rod of the jaw moving oil cylinder 15 extends, it pushes the jaw mounting seat 18 to slide along the T-shaped slideway on the support cylinder 5.

[0026] As Figure 3As shown in the figure, the slewing drive device of the jaw type drill pipe hydraulic lifting cap adopts a planetary gear reducer driven by a hydraulic motor. This reducer has the basic structure of a planetary reducer, including a frame 20, internal and external gear rings 21, an upper support sleeve 22, a sun gear 23, a hydraulic motor 24, a bearing seat ring 25, a gear ring 26, a planetary carrier 27, a lower support sleeve 28, a positioning pin 29, planetary gears 30 and other components. The characteristic of this reducer is that the planetary carrier 27 is fixed to the frame 20. The gear ring 26 has both internal and external gears and rotates relative to the frame 20 via the planetary gear reducer driven by the hydraulic motor 24. The frame 20 is of an integral open structure and is directly fixed to the support cylinder 5 by screws. To enable the reducer components to be installed from the open end of the frame 20, both ends of the planetary carrier 27 are extended by the upper support sleeve 22 and the lower support sleeve 28 respectively and supported in the holes of the upper and lower box plates of the frame 20. The bearing seat ring 25 and the gear ring 26 are connected into one body by screws and then supported at both ends of the planetary carrier 27 by roller bearings respectively. A split nylon positioning pin 29 is provided between the mating cylindrical surfaces of the lower support sleeve 28 and the planetary carrier 27 to achieve the transmission of the reverse torque of the planetary carrier 27 to the gear ring 26. This reverse torque is finally transmitted to the frame 20 because of the flange connection between the lower support sleeve 28 and the lower box plate of the frame 20.

[0027] As Figure 2 shown, the telescopic device of the jaw type drill pipe hydraulic lifting cap uses a hydraulic cylinder to achieve its telescopic function, including components such as an upper cylinder seat cover, a telescopic cylinder, and a lower cylinder seat cover. The upper cylinder seat cover is fixed to the jaw type slide sleeve guide post 8 by screws and serves as the base of the telescopic device. The lower cylinder seat cover is connected to the jaw type tooth slide sleeve 4 by screws. The cylinder barrel side of the telescopic cylinder is hinged to the upper cylinder seat cover, and the piston rod side is hinged to the lower cylinder seat cover. The telescopic movement of the piston rod of the telescopic cylinder can push the jaw type tooth slide sleeve 4 to reciprocate linearly along the inner hole of the support cylinder 5.

[0028] A brief description of the working process of the jaw type drill pipe hydraulic lifting cap when the drill rig connects the drill pipe is as follows:

[0029] Assume that the jaw-type drill pipe to be lifted is in a horizontal position. Connect the upper end of the lifting cap head 7 directly to the pin shaft of the crane hook, and use other lifting equipment to assist in placing the hydraulic lifting cap of the jaw-type drill pipe on the same center line of the jaw-type drill pipe as close as possible. At this time, the claw 19 is in an open state; the piston rod of the claw moving oil cylinder 15 extends, pushing the claw mounting seat 18 to slide along the T-shaped groove slide on the support cylinder 5, so that the hydraulic lifting cap is close to the jaw-type drill pipe until the distance where the claw can hook the outer gear ring of the jaw-type drill pipe is reached. The claw opening and closing oil cylinder 17 acts, and the claw 19 locks the outer gear ring of the jaw-type drill pipe; the oil cylinder piston rod of the telescopic oil cylinder device 6 extends, pushing the jaw tooth sliding sleeve 4 towards the jaw-type drill pipe. The teeth on the jaw tooth sliding sleeve 4 should be inserted into the tooth grooves of the jaw-type drill pipe. If the two cannot mesh smoothly, the rotary drive device 3 needs to be used to drive the jaw tooth sliding sleeve 4 to rotate until the teeth on the jaw tooth sliding sleeve 4 are smoothly inserted into the tooth grooves of the jaw-type drill pipe. When the rectangular teeth of the jaw tooth sliding sleeve 4 cross the inner teeth of the drill pipe, the rotary drive device 3 drives the jaw tooth sliding sleeve 4 to rotate by an angle of one tooth width (22.5°). At this time, the hydraulic lifting cap of the jaw-type drill pipe is integrated with the lifted jaw-type drill pipe, and the drill pipe can be lifted to the wellhead by the crane. The working process of the hydraulic lifting cap of the jaw-type drill pipe when the drill pipe is unloaded from the drilling rig is opposite to the above process.

[0030] In each working cycle of the hydraulic lifting cap of the jaw-type drill pipe, the operator only needs to adjust the approximate position of the hydraulic lifting cap, and rely on the holding rod device 2 and the rotary drive device 3 to realize the automatic precise positioning of the hydraulic lifting cap of the drill pipe to the drill pipe joint.

[0031] The motion control of each oil cylinder and hydraulic motor is realized by its hydraulic system. The hydraulic system refers to the integration of a hydraulic pump station, hydraulic control, and an electrical control system, and the hydraulic system is fixed at a convenient operation location on the drilling rig.

[0032] As an auxiliary operation device for large engineering drilling rigs when using jaw-type drill pipes, the present invention solves the problem of connecting and disconnecting large jaw-type drill pipes, and has the advantages of strong adaptability, compact structure, flexibility, and easy operation. Its excellent working performance will greatly improve the operation efficiency of the drilling rig, which is a breakthrough in the technology of large engineering drilling rigs.

[0033] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above examples, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left", "right", "front", "rear", "upper", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the protected content of the present invention.

Claims

1. A hydraulic lifting cap for a spline drill pipe, Characterized in that, Comprising: A support cylinder, on the outer wall of which there are a plurality of slideways, and the plurality of slideways are distributed at intervals; A spline tooth sliding sleeve, which is arranged in the support cylinder and is slidably matched with the support cylinder, and the spline tooth sliding sleeve can rotate relative to the support cylinder or move in the axial direction; A lifting device, which includes a lifting cap head, a spline sliding sleeve guide column, a clamp, a positioning disc, a retaining ring, a flat key, and a snap ring. The upper end of the lifting cap head is connected to the hook of a crane. The lifting cap head and the spline sliding sleeve guide column are connected by the clamp. The spline sliding sleeve guide column and the positioning disc are connected by a flat key, and the flat key restricts relative rotation between the spline sliding sleeve guide column and the positioning disc. The snap ring is used to restrict axial movement between the spline sliding sleeve guide column and the positioning disc. At least part of the spline sliding sleeve guide column is located in the spline tooth sliding sleeve and is slidably matched with the spline tooth sliding sleeve; A pole holding device, there are a plurality of the pole holding devices, and each pole holding device includes a claw moving oil cylinder support, a claw moving oil cylinder, a lining seat, a claw opening and closing oil cylinder, a claw mounting seat, and a claw. The claw moving oil cylinder support is fixedly connected to the support cylinder. The cylinder end of the claw moving oil cylinder is connected to the claw moving oil cylinder support. The piston rod end of the claw moving oil cylinder is connected to the lining seat. The lining seat is connected to the top end of the claw mounting seat. The cylinder end of the claw opening and closing oil cylinder is rotatably connected to the lining seat. The piston rod end of the claw opening and closing oil cylinder is connected to the claw. The claw is hinged to the bottom end of the claw mounting seat. The claw can rotate relative to the claw mounting seat. The claw mounting seat is slidably matched in the slideway of the support cylinder; A rotary drive device, which is arranged on the support cylinder and is used to drive the spline tooth sliding sleeve to rotate; A telescopic device, which is arranged in the spline tooth sliding sleeve and is used to drive the spline tooth sliding sleeve to move relative to the support cylinder in the axial direction.

2. The hydraulic lifting cap for a spline drill pipe according to claim 1, Characterized in that, The rotary drive device is a planetary gear reducer driven by a hydraulic motor, and includes a frame, an inner and outer gear ring, an upper support sleeve, a sun gear, a hydraulic motor, a bearing seat ring, a gear ring, a planetary carrier, a lower support sleeve, a positioning pin, and planetary gears. The gear ring has an internal gear and an external gear. The frame is fixedly connected to the support cylinder. The two ends of the planetary carrier are lengthened through the upper support sleeve and the lower support sleeve and are respectively supported in the holes of the upper box plate and the lower box plate of the frame. The bearing seat ring and the gear ring are fixedly connected respectively, and the bearing seat ring is supported at both ends of the planetary carrier through roller bearings respectively. The planetary gears are respectively meshed with the internal gear. The sun gear is meshed with the planetary gears.

3. The hydraulic lifting cap for a spline drill pipe according to claim 2, Characterized in that, The telescopic device includes an oil cylinder upper seat cover, a telescopic oil cylinder, and an oil cylinder lower seat cover. The oil cylinder upper seat cover is fixedly connected to the jaw slip sleeve guide column. The oil cylinder lower seat cover is fixedly connected to the jaw tooth slip sleeve. The oil cylinder upper seat cover and the oil cylinder lower seat cover are arranged at intervals. The telescopic oil cylinder is disposed between the oil cylinder upper seat cover and the oil cylinder lower seat cover and is respectively hinged to the oil cylinder upper seat cover and the oil cylinder lower seat cover. The telescopic oil cylinder can drive the jaw tooth slip sleeve to reciprocate linearly in the axial direction within the support cylinder.

4. The jaw-type drill pipe hydraulic lifting cap according to claim 3, wherein, a hydraulic system is further provided, and the movement control of the jaw moving oil cylinder, the jaw opening and closing oil cylinder, the telescopic oil cylinder, and the hydraulic motor is all realized by the hydraulic system.

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