CN212428698U - Shaft packing device near wellhead of oil and gas well - Google Patents
Shaft packing device near wellhead of oil and gas well Download PDFInfo
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- CN212428698U CN212428698U CN202022210304.4U CN202022210304U CN212428698U CN 212428698 U CN212428698 U CN 212428698U CN 202022210304 U CN202022210304 U CN 202022210304U CN 212428698 U CN212428698 U CN 212428698U
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Abstract
The utility model provides an oil gas well near-wellhead wellbore packer, the packer comprises a compression packer and a flange, the compression packer comprises a central tube, a straight-through pipe joint, a sleeve, a lock spring seat, a slip anchoring structure, a rubber cylinder and a lower back cap which are sequentially sleeved on the outer wall of the central tube from top to bottom, an annular channel is formed between the central tube and the lock spring seat, a piston capable of axially sliding is arranged in the annular channel, the upper end of the piston extends upwards into the sleeve and is connected with a connecting sleeve by starting a shear pin; an axial liquid inlet channel is arranged between the central tube and the piston, and the straight-through type pipe joint penetrates through the sleeve and the piston along the radial direction and is communicated with the liquid inlet channel. The blowout prevention packing device is reasonable and compact in structure and convenient to use, can be used for setting and unsetting according to actual construction requirements, quickly completes underground annular packing, achieves underground blowout prevention plugging, and is obvious in blowout prevention effect.
Description
Technical Field
The utility model belongs to the technical field of the emergent measure operation of speedily carrying out rescue work of oil gas field, concretely relates to near well bore department of oil gas well pit shaft packer.
Background
During exploration, development and drilling operations, oil gas at the bottom of a shaft often encounters in the processes of drilling and testing the oil gas, overflows to a well head under the action of pressure, well kick occurs, well control dangerous situations such as out-of-control of an oil pipe in a well, tripping of double male-short connectors of a sleeve, failure of a blowout preventer and the like are caused, blowout occurs if control is not timely or misoperation occurs, personnel injury and equipment damage accidents are caused, the environment is polluted, a well control system needs to be reestablished during blowout emergency operation, the blowout preventer is installed on the well head, and well killing emergency operation is carried out.
However, after blowout occurs on the existing drilling and testing oil gas site, due to the fact that the pressure of the blowout is high, personnel and equipment cannot approach a wellhead where the blowout occurs, an existing blowout preventer does not have a positioning and guiding device, the blowout preventer is difficult to install in place, and meanwhile, mature and available rapid emergency rescue equipment does not exist basically. The emergency operation is frequently delayed, the personnel injury and the equipment damage accident are further caused, and the environment is polluted.
Therefore, the emergency rescue packer capable of being quickly installed on a wellhead and achieving sealing is an urgent problem to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that prior art exists, the utility model discloses an oil gas well is close to pit shaft department and is sealed off device.
The utility model discloses the technical scheme who adopts as follows:
a shaft packer near the wellhead of an oil and gas well comprises a compression packer and a flange,
the compression packer at least comprises a central pipe, a straight-through pipe joint, a sleeve, a spring locking seat, a slip anchoring structure, a rubber cylinder and a lower back cap which are sequentially sleeved on the outer wall of the central pipe from top to bottom,
the upper end of the sleeve is connected to the flange, and the upper end of the central tube is connected with the flange through a connecting sleeve;
an annular channel is formed between the central tube and the spring locking seat, a piston capable of axially sliding along the central tube is arranged in the annular channel, and the upper end of the piston extends upwards into the sleeve and is connected with the connecting sleeve through a starting shear pin; a lock spring is arranged in the lock spring seat,
an axial liquid inlet channel is arranged between the central tube and the piston, and the straight-through type pipe joint penetrates through the sleeve and the piston along the radial direction and is communicated with the liquid inlet channel.
Furthermore, an annular space is formed between the lower end of the piston and the lock spring seat, and a pawl spring is arranged in the annular space.
Specifically, the sleeve and the flange are of an integrated structure formed integrally.
Further, a sealing sleeve for sealing is arranged between the sleeve and the connecting sleeve.
Furthermore, the slips anchoring structure comprises slips and a cone, wherein the slips and the cone are respectively in sliding connection with the central pipe, the upper end face of the slips is in contact with the lower end face of the piston, and the lower end face of the cone is in contact with the upper end face of the rubber cylinder.
Furthermore, the outer side surface of the upper end of the cone is an oblique conical surface; the inner side surface of the lower end of the slip is a conical surface and is in sliding fit with the outer side surface of the upper end of the cone, and slip teeth are arranged on the outer side surface of the lower end of the slip.
Furthermore, a limiting sleeve is sleeved on the lock spring seat and used for limiting the depth of the compression packer in the well bore.
Furthermore, a plurality of spacer rings are arranged on the rubber cylinder at intervals.
A use method of a shaft packing device near a wellhead of an oil and gas well comprises the following steps:
s1, setting operation:
when the compression packer is pressurized to 6-15MPa from the straight-through pipe joint, the shear pin is started to be cut off, liquid acts on the piston through the straight-through pipe joint, the piston pushes the lower back cap, the central pipe and the connecting sleeve to move upwards together, the rubber cylinder is compressed to increase the diameter of the rubber cylinder, and the annular space of the oil separating sleeve is sealed; simultaneously, the slips are released, liquid acts on the slips through the straight-through pipe joint, the slips move downwards, the slips move upwards along the inclined conical surface of the cone, the slips are gradually spread, are eaten and anchored on the casing pipe, when the pressure is continuously increased to 25MPa, the rubber sleeve is completely compressed, the annular space of the oil sleeve is completely sealed, at the moment, the lock spring is locked on the lock spring seat, so that the rubber sleeve and the slips cannot be recovered, and the sealing of the compression type packer seat is completed;
s2, deblocking operation:
the sealing sleeve and the connecting sleeve are disassembled, the central pipe is unlocked, and the compression packer is unlocked.
Adopt above-mentioned technical scheme, the utility model has the advantages as follows:
1. the shaft packing device near the wellhead of the oil and gas well can be quickly inserted into the shaft when abnormal conditions such as well kick occur, the packing of underground annular space is effectively and quickly completed, a sealed oil and gas producing layer is realized in an underground producing layer, underground blowout prevention plugging is realized, and the blowout prevention effect is obvious; just the utility model discloses a rational in infrastructure and compactness, equipment convenient to use to can sit according to actual construction requirement and seal, the deblocking, effectively avoid unexpected seat, deblocking, reduce the operation risk, improve the efficiency of construction.
2. The utility model can make the high pressure fluid in the central pipe act on the rubber tube by pressing the straight-through pipe joint which is arranged radially, and the rubber tube is pressed against the inner wall of the well pipe after expanding, thereby realizing the plugging of the sleeve; after the connecting sleeve is unsealed, the compression type seal can be smoothly taken out, and the operation is simple, safe and reliable.
3. Oil gas well emergency rescue is with preventing spouting packing device's flange is standard flange, convenient and natural gas well head, well accuse double-gate board preventer ring flange lug connection.
The above description is only an overview of the technical solution of the present invention, and in order to clearly understand the technical means of the present invention and to implement the technical solution according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Figure 1 is the utility model discloses the oil gas well is close to wellbore department and is sealed off device's schematic structure diagram.
Description of reference numerals:
1. a flange; 2. a sleeve; 3. sealing sleeves; 4. connecting sleeves; 5. a piston; 6. a central tube; 7. a lock spring seat; 8. a locking spring; 9. a limiting sleeve; 10. a pawl spring; 11. slips; 12. a cone; 13. a rubber cylinder; 14. a spacer ring; 15. a lower back cap; 16. a straight-through pipe joint; 17. starting the shear pin; 18. and a liquid inlet channel.
Detailed Description
The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
the embodiment provides a shaft packing device near a wellhead of an oil and gas well, which is shown in figure 1 and comprises a compression packer and a flange 1,
the compression packer at least comprises a central pipe 6, a straight-through pipe joint 16, a sleeve 2, a locking spring seat 7, a slip anchoring structure, a rubber cylinder 13 and a lower back cap 15, wherein the sleeve 2, the locking spring seat 7, the slip anchoring structure, the rubber cylinder 13 and the lower back cap 15 are sequentially sleeved on the outer wall of the central pipe 6 from top to bottom, the upper end of the sleeve 2 is connected to the flange 1, and the upper end of the central pipe 6 is connected with the flange 1 through a connecting; an annular channel is formed between the central tube 6 and the spring locking seat 7, a piston 5 capable of axially sliding along the central tube 6 is arranged in the annular channel, the upper end of the piston 5 extends upwards into the sleeve 2 and is connected with the connecting sleeve 4 through a starting shear pin 17; a lock spring 8 is arranged in the lock spring seat 7; an axial liquid inlet channel 18 is arranged between the central tube 6 and the piston 5, and a straight-through pipe joint 16 radially penetrates through the sleeve 2 and the piston 5 and is communicated with the liquid inlet channel 18.
The use method of the shaft packing device near the wellhead of the oil and gas well comprises the following steps:
s1, setting operation:
when the compression packer is pressurized to 6-15MPa from the straight-through pipe joint 16, the shear pin 17 is started to be sheared off, liquid acts on the piston 5 through the straight-through pipe joint 16, the piston 5 pushes the lower back cap 15, the central pipe 6 and the connecting sleeve 4 to move upwards together, the rubber cylinder 13 is compressed to expand the rubber cylinder 13, and an annular space of an oil sleeve is sealed; meanwhile, the slip anchoring structure is anchored on the wall of the casing, when the pressure is continuously increased to 25MPa, the rubber cylinder 13 is completely compressed, the annular space of the oil casing is completely sealed, at the moment, the lock spring 8 is locked on the lock spring seat 7, so that the rubber cylinder 13 cannot rebound, and the sealing of the compression type packer is finished;
s2, deblocking operation:
the sealing sleeve 3 and the connecting sleeve 4 are disassembled, the central pipe 6 is unlocked, and the compression type packer is unsealed.
The near-wellhead wellbore packer of the oil-gas well uses a sealed well head sleeve through cooperating with a blowout control car. The packer can enable high-pressure fluid in the central pipe 6 to act on the rubber sleeve through the straight-through pipe joint 16, and the rubber sleeve is tightly propped against the inner wall of the well pipe after being expanded, so that the casing is plugged; after the connecting sleeve is unsealed, the compression type packing can be smoothly taken out.
Example 2:
in addition to embodiment 1, as shown in fig. 1, an annular space is formed between the lower end of the piston 5 and the bolt holder 7, and the pawl spring 10 is provided in the annular space.
Further, the sleeve 2 and the flange 1 are of an integrated structure, the flange 1 is a standard flange and is matched with a blowout preventer flange, and the flange is conveniently and directly connected with a natural gas well mouth and a well control double-ram blowout preventer flange.
A sealing sleeve 3 is arranged between the sleeve 2 and the connecting sleeve 4, and the sealing sleeve 3 is used for sealing a gap between the sleeve 2 and the connecting sleeve 4, so that the sealing performance of the whole device is more stable.
It needs to explain that when needing to dismantle the adapter sleeve and carrying out the deblocking, the utility model discloses can realize dismantling fast and installing of seal cover 3, adapter sleeve 4, easy operation, work efficiency is high.
The use method of the blowout prevention packer for the emergency rescue of the oil and gas well comprises the following steps of:
s1, setting operation:
when the compression packer is pressurized to 10-15MPa from the straight-through pipe joint 16, the shear pin 17 is started to be sheared off, liquid acts on the piston 5 through the straight-through pipe joint 16, the piston 5 pushes the lower back cap 15, the central pipe 6 and the connecting sleeve 4 to move upwards together, the rubber cylinder 13 is compressed to expand the rubber cylinder 13, and the annular space of the oil jacket is sealed; meanwhile, the slip anchoring structure is anchored on the wall of the sleeve, when the pressure is continuously increased to 25MPa, the rubber cylinder 13 is completely compressed, the annular space of the oil sleeve is completely sealed, at the moment, the lock spring 8 is locked on the lock spring seat 7 to ensure that the rubber cylinder cannot rebound, and the rubber cylinder is still in a sealing state all the time even if the setting pressure is removed;
s2, deblocking operation:
the sealing sleeve 3 and the connecting sleeve 4 are disassembled, the central pipe 6 is unlocked, and the compression type packer is unsealed.
Under the condition that well blowout out of control and oil gas well sleeve pipe double-male short circuit were threaded off, the compression packer of the near-wellhead wellbore packer of oil gas well can insert fast, effectively realizes the shutoff of oil jacket in the pit, and the well-known conventional blowout preventer of cooperation trade can provide powerful well control assurance for well blowout out of control oil gas well.
Example 3:
on the basis of embodiment 1, further, the slip anchoring structure comprises slips 11 and a cone 12, the slips 11 and the cone 12 are respectively connected with the central pipe 6 in a sliding manner, the upper end surface of the slips 11 is in contact with the lower end surface of the piston 5, and the lower end surface of the cone 12 is in contact with the upper end surface of the rubber barrel 13.
Furthermore, the outer side surface of the upper end of the cone 12 is an oblique conical surface; the inner side surface of the lower end of the slip 11 is a conical surface and is in sliding fit with the outer side surface of the upper end of the cone 12, and slip teeth are arranged on the outer side surface of the lower end of the slip 11.
Furthermore, a limiting sleeve 9 is sleeved on the lock spring seat 7, and the limiting sleeve 9 is used for limiting the depth of the compression packer in the shaft.
Further, a plurality of spacer rings 14 are arranged on the periphery of the rubber cylinder 13 at intervals, so that the annular space packing capacity can be enhanced, the packing speed can be increased, and the reliability of packing operation can be improved.
The use method of the wellbore packing device near the wellhead of the oil and gas well provided by the embodiment comprises the following steps of:
s1, setting operation:
when the compression packer is pressurized to 6-8MPa from the straight-through pipe joint 16, the shear pin 17 is started to be sheared, liquid acts on the piston 5 through the straight-through pipe joint 16, the piston 5 pushes the lower back cap 15, the central pipe 6 and the connecting sleeve 4 to move upwards together, the rubber cylinder 13 is compressed to enlarge the diameter of the rubber cylinder 13, and an annular space of an oil jacket is sealed; simultaneously, the slips 11 are released, liquid acts on the slips 11 through the straight-through pipe joint 16, the slips 11 move downwards, the slips 11 move upwards along the inclined conical surface of the cone 12, the slips 11 are gradually expanded, are eaten and anchored on the casing pipe, when the pressure is continuously increased to 25MPa, the rubber cylinder 13 is completely compressed, the annular space of the oil sleeve is completely sealed, at the moment, the lock spring 8 is locked on the lock spring seat 7, so that the rubber cylinder 13 and the slips 11 cannot be recovered, and the sealing of the compression type packer is completed;
s2, deblocking operation:
the sealing sleeve 3 and the connecting sleeve 4 are disassembled, the central pipe 6 is unlocked, and the compression type packer is unsealed.
In conclusion, when abnormal conditions such as well kick occur, the shaft packing device near the wellhead of the oil-gas well can effectively and quickly complete the packing of underground annular space, realize the sealing of an oil-gas producing layer in the underground producing layer, realize the underground blowout prevention plugging and have obvious blowout prevention effect; just the utility model discloses a rational in infrastructure and compactness, equipment convenient to use to can sit according to actual construction requirement and seal, the deblocking, effectively avoid unexpected seat, deblocking, reduce the operation risk, improve the efficiency of construction.
The foregoing is only a preferred embodiment of the present invention, and it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (8)
1. The utility model provides an oil gas well near well head department pit shaft packer which characterized in that: comprises a compression packer and a flange, wherein the compression packer is arranged on the flange,
the compression packer at least comprises a central pipe, a straight-through pipe joint, a sleeve, a spring locking seat, a slip anchoring structure, a rubber cylinder and a lower back cap which are sequentially sleeved on the outer wall of the central pipe from top to bottom,
the upper end of the sleeve is connected to the flange, and the upper end of the central tube is connected with the flange through a connecting sleeve;
an annular channel is formed between the central tube and the spring locking seat, a piston capable of axially sliding along the central tube is arranged in the annular channel, and the upper end of the piston extends upwards into the sleeve and is connected with the connecting sleeve through a starting shear pin; a lock spring is arranged in the lock spring seat,
an axial liquid inlet channel is arranged between the central tube and the piston, and the straight-through type pipe joint penetrates through the sleeve and the piston along the radial direction and is communicated with the liquid inlet channel.
2. The wellbore packing apparatus of claim 1, wherein: an annular space is formed between the lower end of the piston and the lock spring seat, and a pawl spring is arranged in the annular space.
3. The wellbore packing apparatus of claim 1, wherein: the sleeve and the flange are of an integrated structure formed integrally.
4. The wellbore packing apparatus of claim 1, wherein: and a sealing sleeve for sealing is arranged between the sleeve and the connecting sleeve.
5. The wellbore packing apparatus of claim 1, wherein: the slip anchoring structure comprises a slip and a cone, the slip and the cone are respectively in sliding connection with the central pipe, the upper end face of the slip is in contact with the lower end face of the piston, and the lower end face of the cone is in contact with the upper end face of the rubber cylinder.
6. An oil and gas well near-wellhead wellbore packing device as claimed in claim 5, wherein: the outer side surface of the upper end of the cone is an oblique conical surface; the inner side surface of the lower end of the slip is a conical surface and is in sliding fit with the outer side surface of the upper end of the cone, and slip teeth are arranged on the outer side surface of the lower end of the slip.
7. The wellbore packing apparatus of claim 1, wherein: and the lock spring seat is sleeved with a limiting sleeve, and the limiting sleeve is used for limiting the depth of the compression packer in the shaft.
8. The wellbore packing apparatus of claim 1, wherein: a plurality of spacer rings are arranged on the rubber cylinder at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210304.4U CN212428698U (en) | 2020-09-30 | 2020-09-30 | Shaft packing device near wellhead of oil and gas well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022210304.4U CN212428698U (en) | 2020-09-30 | 2020-09-30 | Shaft packing device near wellhead of oil and gas well |
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| CN212428698U true CN212428698U (en) | 2021-01-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049601A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气集团有限公司 | Shaft packing device near wellhead of oil and gas well and using method thereof |
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2020
- 2020-09-30 CN CN202022210304.4U patent/CN212428698U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049601A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气集团有限公司 | Shaft packing device near wellhead of oil and gas well and using method thereof |
| CN112049601B (en) * | 2020-09-30 | 2023-11-17 | 中国石油天然气集团有限公司 | Wellbore packer device at near wellhead of oil and gas well and application method thereof |
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