CN213627496U

CN213627496U - Releasing device

Info

Publication number: CN213627496U
Application number: CN202022260066.8U
Authority: CN
Inventors: 孙玉豹; 孙永涛; 王通; 马增华; 顾启林; 胡厚猛; 勾字文
Original assignee: China Oilfield Services Ltd
Current assignee: China Oilfield Services Ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-07-06
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses a releasing device, a serial communication port, include: a rotating sleeve comprising a sleeve body comprising a top end and a bottom end opposite the top end; the hook-shaped groove comprises a first vertical section extending from the end part of the bottom end to the top end, a second vertical section extending from the position, close to the bottom end, of the sleeve body to the top end, and an inclined section; the first connecting pipe comprises a first pipe body, and one end of the first connecting pipe can be inserted into the bottom end; the suspension column extends out from the outer peripheral surface of the first pipe body in the radial direction and can extend into the second vertical section; one end of the second connecting pipe is rotatably connected with the top end; and a pin, both ends of which are respectively connected to the first connecting pipe and the rotating sleeve. By adopting the releasing device, whether the pressure in a shaft and the pressure in an oil pipe is increased or not, the first connecting pipe and the rotating sleeve can be quickly and safely separated.

Description

Releasing device

Technical Field

The utility model relates to an oil development technical field, more specifically relates to a releasing device.

Background

In the aspect of drilling and completing well heads in offshore oil fields, a device capable of quickly tripping a tubing hanger under a pressurized environment is sometimes needed, so that the safety of the well heads is ensured. For example: in the offshore injection-production integrated process, when an oil pipe is connected back, the oil pipe hanger needs to be quickly put in place and quickly disconnected in a pressurized environment due to the fact that the fluid pressure at the bottom of the well is high.

Existing releasing devices are limited to releasing downhole tools, such as releasing packers or slips, through elastomeric components or hydraulic principles. For example, chinese patent publication No. CN209212189U discloses a new releasing device, which contains a spring-type locking pawl, and the performance of the locking pawl of the new releasing device decreases with the increase of the frequency of use, so that the releasing operation cannot be performed normally. This novel releasing device also can't realize the safe effectual release under the no hydraulic pressure environment of oil pipe hanger.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a releasing device, it includes:

a rotating sleeve comprising

A sleeve body including a top end and a bottom end opposite the top end;

the hook-shaped groove comprises a first vertical section extending from the end part of the bottom end to the top end, a second vertical section extending from the position, close to the bottom end, of the sleeve body to the top end, and an inclined section;

a first connecting pipe comprising

A first tube having one end insertable into the bottom end;

a suspension post extending radially outward from an outer peripheral surface of the first pipe body and capable of extending into the first pipe body

In the second vertical section;

one end of the second connecting pipe is rotatably connected with the top end, and the second connecting pipe and the rotating sleeve can only rotate relatively around the axis; and

a pin having both ends connected to the first connection pipe and the rotary sleeve, respectively;

the two opposite ends of the inclined section are respectively connected with one end, close to the top end, of the first vertical section and one end, close to the top end, of the second vertical section, the distance between the side edge, close to the top end, of the inclined section and the top end is gradually increased from the first vertical section to the second vertical section, and the diameters of the suspension columns are smaller than the width of the narrowest part of the hook-shaped groove.

The embodiment of the utility model provides an in, when carrying out the releasing operation, push down the second connecting pipe, the second connecting pipe descends is followed to rotatory sleeve, because first connecting pipe can be fixed and remain motionless by oil pipe, hangs the post and enters into the slope section along first vertical section to offset with the oblique side of slope section. The inclined side of the inclined section and the suspension column are mutually extruded to enable the rotary sleeve to rotate, the pin is cut off by the rotary sleeve in the rotating process, and meanwhile, the suspension column is close to the first vertical section along the inclined section. After the rotating sleeve is rotated to the point where the suspension post enters the first vertical section, the second connecting tube is pressed down into place. Then, the first connection tube is lifted. The rotating sleeve rises along with the second connecting pipe, the hanging column descends relative to the rotating sleeve at the moment, and the hanging column moves towards the lower end opening of the first vertical section along the first vertical section until finally coming out of the hook-shaped groove, so that the rotating sleeve is separated from the first connecting pipe. Therefore, whether the pressure in the well bore and the oil pipe is pressurized or not, the first connecting pipe and the rotating sleeve can be quickly and safely separated.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention and not to limit the embodiments of the invention.

Fig. 1 is a schematic structural view of a releasing device in the present invention;

fig. 2 is a schematic full-section view of a releasing device in the present invention;

FIG. 3 is a schematic structural view of the releasing device in a pressed-down state according to the present invention;

fig. 4 is a schematic structural diagram of the releasing device in the lifting state of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

As shown in fig. 1 and 2, fig. 1 and 2 show a structure of a releasing device 1. The releasing device 1 comprises a rotating sleeve 11, a first connecting pipe 12, a second connecting pipe 13, an oil pipe hanger 15, a joint 16, a limiting piece 10 and a pin 14. One end of the rotating sleeve 11 is used for hanging the first connecting pipe 12, and the other end of the rotating sleeve 11 is rotatably connected with the second connecting pipe 13.

The rotating sleeve 11 includes a sleeve body 111, a hook groove 112, and a first lug 116. The sleeve body 111 has a straight cylindrical shape. The sleeve body 111 includes a top end and a bottom end opposite the top end. When the sleeve body 111 is vertically arranged, the top end of the sleeve body faces upward, and the bottom end of the sleeve body faces downward. A first collar 116 is provided at the top end of the sleeve body 111, the first collar 116 projecting radially inward from the inner peripheral surface of the sleeve body 111. The first collar 116 is disposed coaxially with the sleeve body 111.

A hook type groove 112 is provided at the bottom end of the sleeve body 111. Hook slot 112 includes a first vertical segment 113, a second vertical segment 114, and an angled segment 115. The first vertical section 113, the inclined section 115, and the second vertical section 114 are connected in sequence. The first vertical section 113 extends from an end of the bottom end of the sleeve body 111 toward the top end of the sleeve body 111. The lower end of the first vertical section 113 extends to the end of the bottom end of the sleeve body 111, and an opening is formed at the end of the bottom end of the sleeve body 111. The second vertical section 114 extends from a position of the sleeve body 111 near the bottom end toward the top end of the sleeve body 111. The lower end of the second vertical section 114 does not extend to the end of the bottom end of the sleeve body 111. The upper end of the first vertical section 113 is closer to the top end of the sleeve body 111 than the upper end of the second vertical section 114. Opposite ends of the inclined section 115 are connected to upper ends of the first and second

vertical sections

113 and 114, respectively. The inclined section 115 has two opposite sides, wherein the side near the top end of the sleeve body 111 is inclined, and the side far from the top end of the sleeve body 111 extends along the circumferential direction of the sleeve body 111. Thus, the bottom end of the sleeve body 111 forms a hook.

The first connection tube 12 includes a first tube body 121 and a suspension post 122. The first tube 121 is a circular tube. The suspension post 122 is cylindrical, and may be cylindrical. The suspension post 122 is provided on the outer circumferential surface of the first pipe body 121. The suspension post 122 extends radially outward from the outer peripheral surface of the first tubular body 121. The diameter of the hanger post 122 is less than the width of the narrowest portion of the hook-shaped slot 112. When the first connecting pipe 12 is vertically arranged, the hanging column 122 is close to the upper end of the first pipe body 121.

The upper end of the first pipe body 121 is inserted into the sleeve body 111 from the bottom end of the sleeve body 111, and the hanging column 122 on the first pipe body 121 is hung on the hook on the bottom end of the sleeve body 111, i.e., the hanging column 122 on the first pipe body 121 extends into the lower end of the second vertical section 114 of the hook groove 112 to hang the first connecting pipe 12 on the rotating sleeve 11.

A tubing hanger 15 is provided at the lower end of the first connection pipe 12. The tubing hanger 15 may be cylindrical. The tubing hanger 15 is arranged coaxially with the first tubular body 121 of the first connection tube 12. The tubing hanger 15 may be threaded onto the lower end of the first tubular body 121. The tubing hanger 15 is used to secure the first connection tube 12 and tubing relative to each other.

The sleeve body 111 is further provided with a first pin hole, and the first connecting pipe 12 is provided with a second pin hole. When the first connecting pipe 12 is hung on the rotating sleeve 11, the first pin hole is aligned with the second pin hole, and the pin 14 is inserted into the first pin hole and the second pin hole in sequence. The both ends of the pin 14 are connected to the first connection pipe 12 and the rotary sleeve 11, respectively, and prevent the first connection pipe 12 from being separated from the rotary sleeve 11 due to relative rotation between the first connection pipe 12 and the rotary sleeve 11 when there is no need to separate the rotary sleeve 11 and the first connection pipe 12 from each other.

The second connection pipe 13 includes a second pipe body 131 and a second male ring 132. The second tube 131 is a circular tube. The lower end of the second tube 131 can be inserted into the top end of the sleeve body 111. The second tube 131 is in clearance fit with the sleeve body 111. The second collar 132 is disposed at the lower end of the second tube 131 and is coaxial with the second tube 131. The second collar 132 protrudes radially outward from the outer circumferential surface of the second tube 131.

The stopper 10 is provided on the inner circumferential surface of the sleeve body 111. The limiting member 10 may be a circular ring. The stopper 10 is disposed coaxially with the sleeve body 111. The outer peripheral surface of the stopper 10 and the inner peripheral surface of the sleeve body 111 are in contact with each other. The limiting member 10 and the sleeve body 111 may be screwed together. The limiting member 10 and the first collar 116 are separated from each other to form an annular space, and the second collar 132 is disposed in the annular space. The retaining member 10 and the first collar 116 block the axial movement of the second collar 132 from the opposite ends of the second collar 132, and the first collar 116 can rotate around its axis. In this way, the second connecting pipe 13 and the rotating sleeve 11 can only rotate relatively, but cannot move relatively in the axial direction.

The joint 16 may be cylindrical. The joint 16 is connected to the upper end of the second pipe body 131. The joint 16 is disposed coaxially with the second pipe body 131. The connection between the nipple 16 and the second tube 131 may be a threaded connection. The end of the joint 16 facing away from the second tube 131 is provided with an internal thread for externally connecting a lifting device.

In use, the lower end of the first connecting tube 12 is fixed relative to the tubing by a tubing hanger 15 and the upper end of the second connecting tube 13 is fixed relative to the lifting device by a joint 16. The second connection pipe 13 can be lifted by the lifting device, and the second connection pipe 13 can be pressed down by the lifting device. When a releasing operation is required, as shown in fig. 3, the second connecting pipe 13 is pressed down by the lifting device, the rotating sleeve 11 descends along with the second connecting pipe 13, and the suspension post 122 enters the inclined section 115 along the first vertical section 113 and abuts against the inclined side edge of the inclined section 115 because the first connecting pipe 12 is fixed on the oil pipe and remains stationary. The pressing of the angled side of the angled section 115 against the depending post 122 causes the rotatable sleeve 11 to rotate, which causes the rotatable sleeve 11 to shear the pin 14 during rotation, while the depending post 122 approaches the first upright section 113 along the angled section 115. After the rotating sleeve 11 has been rotated until the suspension post 122 has entered the first upright 113, the second connecting tube 13 is pressed down into position. Then, as shown in fig. 4, the first connection pipe 12 is lifted up by the lifting device. The rotating sleeve 11 is raised along with the second connecting pipe 13, and at this time, the hanging stud 122 is lowered relative to the rotating sleeve 11, and the hanging stud 122 moves along the first vertical section 113 toward the lower end opening of the first vertical section 113 until finally escaping from the hook-shaped groove 112, thereby achieving the separation of the rotating sleeve 11 from the first connecting pipe 12. Therefore, the tubing hanger 15 can be quickly and safely removed regardless of the pressure in the wellbore and in the tubing.

Further, the hook groove 112 is provided in plural, for example, 3. The plurality of hook type grooves 112 are uniformly distributed along the circumferential direction of the sleeve body 111. The number of suspension posts 122 is the same as the number of hook-type slots 112, i.e., 3 is also possible. The plurality of suspension posts 122 are disposed at the same height. The plurality of suspension posts 122 are disposed to be evenly distributed along the circumferential direction of the first pipe body 121. The hanging posts 122 are arranged in one-to-one correspondence with the hook-shaped grooves 112, and the hanging posts 122 can extend into the corresponding hook-shaped grooves 112.

The plurality of hanging columns 122 are distributed and matched with the hook-shaped grooves 112, so that the acting force between the rotating sleeve 11 and the first connecting pipe 12 can be distributed more uniformly and reasonably.

Further, as shown in fig. 2, the releasing device 1 further comprises a first sealing ring 17. The first seal ring 17 is annular. The first sealing ring 17 may be a rubber ring. The first sealing ring 17 is sleeved on the first pipe 121 and is coaxially disposed with the first pipe 121. The first seal 17 may be located near the upper end of the first tube 121. The first pipe body 121 may be provided at an outer wall thereof with an annular mounting groove into which an inner edge portion of the first packing 17 is inserted. The outer edge of the first seal ring 17 can abut against the inner circumferential surface of the sleeve body 111.

The first seal ring 17 is interposed between the first pipe body 121 and the sleeve body 111, and seals a gap between the first pipe body 121 and the sleeve body 111.

Further, as shown in fig. 2, the releasing device 1 further comprises a second sealing ring 17. The second seal ring 17 is annular. The second sealing ring 17 may be a rubber ring. The second seal ring 17 is fitted around the second pipe 131 and is disposed coaxially with the second pipe 131. The second packing 17 may be located near the lower end of the second pipe 131. The inner edge of the second gasket 17 abuts against the outer peripheral surface of the second pipe 131.

The inner wall of the first male ring 116 may be provided with a mounting groove into which the outer edge portion of the second packing 17 is fitted.

The second seal ring 17 is interposed between the second pipe 131 and the first collar 116, and seals a gap between the second pipe 131 and the first collar 116.

In the description of the present invention, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "mouth" word structure "and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and thus, is not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, or may be connected through two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Although the embodiments of the present invention have been described above, the description is only for the convenience of understanding the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A releasing device, comprising:

a rotating sleeve comprising

A sleeve body including a top end and a bottom end opposite the top end;

a first connecting pipe comprising

A first tube having one end insertable into the bottom end;

the suspension column extends out from the outer peripheral surface of the first pipe body in the radial direction and can extend into the second vertical section;

one end of the second connecting pipe is rotatably connected with the top end, and the second connecting pipe and the rotating sleeve can only rotate relatively; and

the two opposite ends of the inclined section are respectively connected with one end, close to the top end, of the first vertical section and one end, close to the top end, of the second vertical section, the distance between the side edge, close to the top end, of the inclined section and the top end is gradually increased in the direction from the first vertical section to the second vertical section, and the diameters of the suspension columns are smaller than the width of the narrowest part of the hook-shaped groove.

2. The releasing device of claim 1, wherein:

the hook-shaped grooves are uniformly distributed along the circumferential direction of the sleeve body;

the number of the hanging columns is the same as that of the hook-shaped grooves, and the hanging columns are uniformly distributed along the circumferential direction of the first pipe body.

3. The releasing device of claim 1, wherein:

the rotating sleeve further comprises a first bulge loop protruding inwards from the inner circumferential surface of the top end in the radial direction;

the releasing device also comprises a limiting piece arranged on the inner circumferential surface of the sleeve body;

the second connecting pipe comprises a second pipe body with one end inserted into the top end and a second convex ring which radially and outwards protrudes from the outer peripheral surface of the second pipe body;

the second convex ring is arranged between the limiting piece and the first convex ring.

4. The releasing device of claim 3, wherein:

the limiting piece is annular, and the outer peripheral surface of the limiting piece abuts against the inner peripheral surface of the sleeve body.

5. The releasing device of claim 1, wherein:

the releasing device further comprises an oil pipe hanger, and the oil pipe hanger is arranged at one end, deviating from the rotating sleeve, of the first pipe body.

6. The releasing device of claim 1, wherein:

the releasing device also comprises a first sealing ring sleeved on the first pipe body;

the inner edge of the first sealing ring abuts against the outer peripheral surface of the first pipe body, and the outer edge of the first sealing ring abuts against the inner peripheral surface of the sleeve body.

7. The releasing device of claim 3, wherein:

the releasing device also comprises a second sealing ring sleeved on the second pipe body;

the inner edge of the second sealing ring abuts against the outer peripheral surface of the second pipe body, and the outer edge of the second sealing ring abuts against the inner peripheral surface of the first convex ring.

8. The releasing device of claim 3, wherein:

the releasing device further comprises a joint arranged at one end, deviating from the rotating sleeve, of the second pipe body.

9. The releasing device of claim 1, wherein:

the suspension column is a cylinder.