Brake device for pipe slipping or pipe flying in coiled tubing tripping operation

Abstract

The utility model discloses a brake device for pipe slipping or pipe flying in coiled tubing tripping operation, which comprises a shell, a piston structure, a piston support, a brake device and a brake device, wherein the piston structure is arranged above a piston support frame of the shell; the piston structure moves up and down along the inner cavity of the shell; an annular rubber structure is arranged on the piston structure, a variable-diameter friction block is arranged in the annular rubber structure, and the variable-diameter friction block is provided with a framework with a groove and a protrusion. The opening and the contraction of the variable-diameter friction block are controlled through the loosening and the tightening of the annular rubber structure; a lower wear-resistant liner is arranged at the position, in contact with the piston structure, of the periphery of the annular rubber structure; a top cover is arranged above the shell, and an upper limiting filler block is arranged on the inner circumference of the top cover through a fastener; and tightening of the annular rubber structure is realized through matched extrusion of the lower wear-resistant liner and the upper limiting filler block. The continuous oil pipe braking device can brake the stalled continuous oil pipe on the premise of not damaging the continuous oil pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil and gas blowout preventer manufacturing, and particularly relates to a braking device for pipe sliding or flying in continuous tubing tripping operation. BACKGROUND

[0002] The continuous tubing may fly or slide due to well pressure or hinged fracture during tripping, the existing continuous tubing suspension device can only suspend the static continuous tubing, and the suspension purpose is achieved by the slip biting into the outer wall of the tubing, which may damage the outer wall of the tubing. Therefore, a device capable of braking the continuous tubing without damaging the continuous tubing during pipe sliding or flying is required. The diameters, weights and well pressures of continuous tubings used in different wellbores are different, and the continuous tubing brake needs to meet the continuous tubings with different diameters and different braking friction requirements. Since the length of the continuous tubing is more than 3000 meters, the kinetic energy during pipe sliding or flying is huge, and a large amount of heat will be generated during braking, so the braking device needs to withstand a certain degree of high temperature. SUMMARY

[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of the utility model is to provide a braking device for pipe sliding or flying in continuous tubing tripping operation.

[0004] The purpose is to solve the problem of pipe flying or sliding during continuous tubing tripping, and to brake the stalled continuous tubing without damaging the continuous tubing. The continuous tubing brake can be installed with a blowout preventer or a blowout box, or multiple superimposed installations can be used to increase the braking friction.

[0005] A braking device for pipe sliding or flying in continuous tubing tripping operation, comprising:

[0006] A housing is provided with a piston structure above the piston support frame of the housing;

[0007] The piston structure moves up and down along the inner cavity of the housing;

[0008] An annular rubber structure is provided on the piston structure, and a variable-diameter friction block is provided in the annular rubber structure,

[0009] The variable-diameter friction block is provided with a skeleton with grooves and protrusions;

[0010] The variable-diameter friction block is assembled into an annular shape on the plane through the skeleton structure;

[0011] The opening and contraction of the variable-diameter friction block are controlled by the relaxation and tightening of the annular rubber structure;

[0012] The outer periphery of the annular rubber structure is provided with a lower wear-resistant lining at the position in contact with the piston structure.

[0013] A top cover is arranged above the shell, and an upper limiting block is arranged on the inner periphery of the top cover through a fastener;

[0014] The ring-shaped rubber structure is tightened through extrusion of the lower wear-resistant pad and the upper limiting block.

[0015] In one preferred embodiment of the utility model, a first sealing ring is arranged on the contact surface between the inner periphery of the top cover and the upper limiting block.

[0016] In one preferred embodiment of the utility model, a piston outer wear-resistant ring and a piston outer sealing ring are arranged on the contact surface between the outer side of the piston structure and the shell;

[0017] A piston inner wear-resistant ring, a piston inner upper sealing ring and a piston inner lower sealing ring are arranged on the contact surface between the inner side of the piston structure and the shell.

[0018] In one preferred embodiment of the utility model, the piston structure is supported on the shell.

[0019] In one preferred embodiment of the utility model, the fastener is a screw.

[0020] In one preferred embodiment of the utility model, the top cover is supported and installed on the upper end of the shell through a cooperating cover-shaped nut and a stud bolt.

[0021] In one preferred embodiment of the utility model, a combination ring is installed between the inner side of the lower end of the top cover, the outer side of the piston structure and the inner side of the shell;

[0022] A second sealing ring is arranged on the contact surface between the combination ring and the inner side of the lower end of the top cover;

[0023] A combination ring upper sealing ring, a combination ring lower sealing ring and a combination wear-resistant ring are arranged on the contact surface between the combination ring and the outer side of the piston structure;

[0024] A third sealing ring is arranged on the contact surface between the combination ring and the inner side of the shell.

[0025] In one preferred embodiment of the utility model, the variable-diameter friction block is made of metal material.

[0026] The working principle of the utility model is as follows:

[0027] The utility model can stop the continuous oil pipe under the premise of not damaging the continuous oil pipe. The continuous oil pipe stopper can be installed with a blowout preventer and a blowout box, or multiple superimposed installations are used to increase the stopping friction. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Structure diagram of the utility model Figure One .

[0029] Figure 2 Structure diagram of the utility model Figure Two . DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below through the drawings and examples. However, it should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the scope of the utility model. In addition, the description of known structures and technologies is omitted in the following structure to avoid unnecessary confusion of the concept of the utility model.

[0031] In the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, "first" and "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0032] As shown in Figure 1 A stop device for pipe sliding or flying in coiled tubing tripping operation, as shown in 1 or 2, including a shell 8, a piston structure 7 is arranged above the piston support frame of the shell 8.

[0033] The piston structure 7 is supported and arranged on the shell 8.

[0034] A piston outer wear-resistant ring 9 and a piston outer sealing ring 10 are arranged on the contact surface between the outer side of the piston structure 7 and the shell 8, and a piston inner wear-resistant ring 24, a piston inner upper sealing ring 21 and a piston inner lower sealing ring 23 are arranged on the contact surface between the inner side of the piston structure 7 and the shell 8.

[0035] The piston structure 7 moves up and down along the inner cavity of the shell 8, an annular rubber structure 3 is arranged on the piston structure 7, a variable-diameter friction block 4 is arranged in the annular rubber structure 3, the variable-diameter friction block 4 is provided with a skeleton 5 with grooves and protrusions, and the skeleton 5 is assembled into a ring shape along the grooves and protrusions, and the protrusions of the skeleton 5 move along the grooves to control the inner diameter of the variable-diameter friction block.

[0036] The opening and closing of the variable-diameter friction block 4 are controlled by the relaxation and tightening of the annular rubber structure 3.

[0037] The position where the outer periphery of the annular rubber structure 3 contacts the piston structure 7 is provided with a lower wear-resistant lining 6, a top cover 12 is arranged above the shell 8, and an upper limiting bush 1 is arranged on the inner periphery of the top cover 12 through a fastener 13.

[0038] A first sealing ring 2 is arranged on the contact surface between the inner periphery of the top cover 12 and the upper limiting bush 1, and the top cover 12 is supported and installed on the upper end of the shell 8 through a matched cover-shaped nut 14 and a double-headed bolt 15.

[0039] The annular rubber structure 3 is tightened through the cooperation and extrusion of the lower wear-resistant lining 6 and the upper limiting bush 1.

[0040] A combination ring 17 is arranged between the inner side of the lower end of the top cover 12, the outer side of the piston structure 7 and the inner side of the shell 8, and a second sealing ring 16 is arranged on the contact surface between the combination ring 17 and the inner side of the lower end of the top cover 12.

[0041] A combination ring upper sealing ring 18, a combination ring lower sealing ring 22 and a combination wear-resistant ring 20 are arranged on the contact surface between the combination ring 17 and the outer side of the piston structure 7.

[0042] A third sealing ring 19 is arranged on the contact surface between the combination ring 17 and the inner side of the shell 8.

[0043] Because of the above structure, the working principle of the utility model is as follows:

[0044] The variable-diameter friction block is assembled into an annular shape through grooves and protrusions on the plane, and is connected by the annular rubber structure.

[0045] Under the upward action of the piston structure, the annular rubber structure is extruded, the variable-diameter friction block is inwardly contracted, the continuous oil pipe is tightly held, the continuous oil pipe is stopped through friction, and the suspension state of the oil pipe can be maintained for a long time through pressure maintaining of the oil path.

[0046] The piston structure moves downward, the compressed annular rubber structure can be automatically reset, the variable-diameter friction block is opened, and the oil pipe is loosened.

[0047] When the variable-diameter friction block is in the open state, the annular rubber structure is in the relaxed state, at this time, the upper oil path is filled with oil, and the piston is located at the bottom of the inner cavity of the shell.

[0048] When the lower part of the piston structure is filled with oil, the piston structure moves upward, the upper limiting bush is extruded with the lower wear-resistant lining, the variable-diameter friction block is contracted to the center under the guidance of the grooves and protrusions of the framework, the annular inner diameter of the variable-diameter friction block is contracted under the guidance of the grooves and protrusions, and the variable-diameter friction block tightly holds the continuous oil pipe.

[0049] When the oil path is pressure maintained, the variable-diameter friction block can maintain the open or closed state.

[0050] The continuous tubing stopper can be connected with the blowout preventer and the blowout box through the upper thread and the lower flange.

[0051] According to different requirements of the friction force of the continuous tubing under actual working conditions, the plurality of continuous tubing stoppers can be connected.

[0052] The variable-diameter friction block is made of metal material. The hard friction of the annular clamping with the outer wall of the continuous tubing during the stopping does not damage the surface of the continuous tubing and can withstand the high temperature and abrasion generated by the friction.

[0053] The hard friction of the annular clamping with the outer wall of the continuous tubing does not damage the surface of the continuous tubing and can withstand the high temperature and abrasion generated by the friction. Meanwhile, the operation is not affected during the running and lowering of the continuous tubing, and the continuous tubing of different specifications within a certain size range can be compatible.

[0054] The shell and the piston structure adopt an annular structure, the piston thrust is large, and after extruding the annular rubber and the variable-diameter friction block, a large positive pressure can be applied to the outer wall of the continuous tubing to provide sufficient friction force for stopping the continuous tubing.

[0055] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model.

[0056] Those skilled in the art should understand that the utility model is not limited to the above embodiments, and the above embodiments and the description in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for stopping a tubing string from running or flying in a coiled tubing rig-up or rig-down operation, characterized in that, The utility model relates to a piston structure of a hydraulic cylinder, comprising: a shell, a piston structure is arranged above a piston support frame of the shell; the piston structure moves up and down along the inner cavity of the shell; an annular rubber structure is arranged on the piston structure, and a variable-diameter friction block is arranged in the annular rubber structure, the variable-diameter friction block is provided with a framework with grooves and protrusions; the opening and contraction of the variable-diameter friction block are controlled by the relaxation and tightening of the annular rubber structure; a lower wear-resistant lining is arranged at the position where the outer periphery of the annular rubber structure is in contact with the piston structure; a top cover is arranged above the shell, and an upper limiting bush is arranged on the inner periphery of the top cover through a fastener; the annular rubber structure is tightened by extrusion through the cooperation of the lower wear-resistant lining and the upper limiting bush.

2. A stopping device for use in the event of a tubing slip or tubing fly in the running or tripping of coiled tubing as claimed in claim 1, wherein, a first sealing ring is arranged on the contact surface of the inner periphery of the top cover and the upper limiting bush.

3. A stopping device for use in the event of a tubing slip or tubing fly in the running or tripping of coiled tubing as claimed in claim 1, wherein, a piston outer wear-resistant ring and a piston outer sealing ring are arranged on the contact surface of the outer side of the piston structure and the shell; a piston inner wear-resistant ring, a piston inner upper sealing ring and a piston inner lower sealing ring are arranged on the contact surface of the inner side of the piston structure and the shell.

4. A stopping device for use in the event of a tubing slip or tubing fly in the running or tripping of coiled tubing as claimed in claim 1, wherein, The piston structure is supported and arranged on the shell.

5. A stopping device for use in a coiled tubing running and pulling operation in the event of a tubing slip or tubing flyaway as defined in claim 1, wherein, The fastener is a screw.

6. The braking device for preventing tubing slippage or overrun during coiled tubing tripping operations as described in claim 1, characterized in that, The top cover is supported and installed on the upper end of the shell through a matched cover-shaped nut and a double-headed bolt.

7. A braking device for preventing tubing slippage or overrun during coiled tubing tripping operations as described in claim 1, characterized in that, A combination ring is installed between the inner side of the lower end of the top cover, the outer side of the piston structure and the inner side of the shell; a second sealing ring is arranged on the contact surface of the combination ring and the inner side of the lower end of the top cover; a combination ring upper sealing ring, a combination ring lower sealing ring and a combination wear-resistant ring are arranged on the contact surface of the combination ring and the outer side of the piston structure; a third sealing ring is arranged on the contact surface of the combination ring and the inner side of the shell.

8. A braking device for preventing tubing slippage or overrun during coiled tubing tripping operations as described in claim 1, characterized in that, The variable-diameter friction block is made of metal material.

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