CN216517917U - Self-locking washable Y221 packer - Google Patents
Self-locking washable Y221 packer Download PDFInfo
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- CN216517917U CN216517917U CN202122568888.7U CN202122568888U CN216517917U CN 216517917 U CN216517917 U CN 216517917U CN 202122568888 U CN202122568888 U CN 202122568888U CN 216517917 U CN216517917 U CN 216517917U
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- central pipe
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Abstract
The utility model discloses a self-locking washable Y221 well packer which comprises an upper joint and a central pipe, wherein the outer side of the central pipe is provided with a backwashing valve outer barrel, an outer central pipe, a cone, a slip seat, a reversing main body and a friction block from top to bottom; the top end of the central pipe is clamped and communicated with the lower part of the upper joint; the spring is positioned between the upper joint and the top end of the backwashing valve core; a backwashing liquid inlet hole is formed in the backwashing valve outer cylinder corresponding to the backwashing valve core ring sleeved on the outer side of the central pipe; a sealing rubber cylinder is arranged on the outer side of the outer central pipe, and a backwashing channel is formed between the inner side of the lower part of the outer central pipe and the central pipe; the side wall of the cone is provided with a cone backwashing through hole, the upper part of the slip is positioned in the inclined slideway at the outer side of the cone, and the lower part of the slip is positioned at the inner side of the slip seat; the bottom end of the slip seat is contacted with the top of the reversing main body; the reversing sliding nail arranged on the central tube is positioned in the reversing groove of the reversing main body and moves along the reversing groove of the reversing main body, the lower part of the reversing main body is clamped on the inner side of the top of the friction block, and the elastic sheet is arranged between the friction block and the central tube.
Description
Technical Field
The utility model belongs to the technical field of packers, and particularly relates to a self-locking washable well Y221 packer.
Background
The packer refers to a downhole tool which is connected to a downhole tubular column and used for packing and isolating an oil pipe and an oil and gas well casing or an open hole well wall annular space; the method is mainly used for the construction of measures such as layered oil extraction, water injection, water exploration, water plugging, squeezing plugging, acidification, fracturing and the like. The Y221 packer is widely applied to a pumping isolation pipe column, but after the conventional Y221 packer is set, an oil pipe and a pump barrel above the packer can be bent and deformed in the axial direction under the action of a weight, so that eccentric wear of the pipe rod is aggravated, and the load of the pumping unit is increased. Meanwhile, the conventional Y221 packer does not have a backwashing function, and the backwashing valve of the packer with the backwashing function of other specifications is sealed by a standard O-shaped sealing ring, so that the sealing ring is easy to fall off under the scouring action of liquid or the sealing ring is bitten under the repeated opening and closing action of a valve core to lose the sealing action, thereby causing the sealing failure of the backwashing valve and leading to the loss of the effect of the packer. Therefore, a self-locking washable well Y221 packer needs to be developed.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a self-locking washable well Y221 packer.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a self-locking washable well Y221 packer comprises an upper joint and a central pipe, wherein a backwashing valve outer cylinder, an outer central pipe, a cone, slips, a slip seat, a reversing main body and a friction block are arranged on the outer side of the central pipe 18 from top to bottom;
the lower part of the upper joint is tightly connected with the backwashing valve outer cylinder; the top end of the central pipe is clamped and communicated with the inner ring of the lower part of the upper joint; meanwhile, a circle of spring is sleeved outside the central pipe, the top of the spring abuts against the bottom end of the lower part of the upper joint, the bottom of the spring abuts against the top end of the backwashing valve core, and the spring plays a pre-tightening and pre-compressing role; the backwashing valve core is positioned between the backwashing valve outer cylinder and the central pipe, and a backwashing liquid inlet hole is formed in the corresponding backwashing valve outer cylinder on the outer side of the backwashing valve core; the annular space between the outer central pipe and the central pipe forms a backwashing channel; the upper part of the outer central pipe is tightly connected with the outer cylinder of the backwashing valve; a sealing rubber cylinder is arranged on the outer side of the outer central tube, and the bottom end of the outer central tube is positioned between the central tube and the cone; the side wall of the cone is provided with a plurality of cone backwashing through holes communicated with the outside, and the plurality of cone backwashing through holes and an annular space formed between the central pipe and the cone form a cone backwashing channel together; the lower part of the cone and the central tube are locked with each other;
the upper part of the slip is positioned in the inclined slideway at the outer side of the cone, and the lower part of the slip is positioned at the inner side of the slip seat; the bottom end of the slip seat is abutted against the top end of the reversing main body; the side wall of the reversing main body is provided with a reversing main body reversing groove, a reversing sliding nail arranged on a central pipe on the central pipe is positioned in the reversing main body reversing groove and moves along the reversing main body reversing groove, the lower part of the reversing main body is clamped on the inner side of the top of a friction block, and an elastic sheet is arranged between the friction block and the central pipe.
Furthermore, the central tube is of a hollow pipeline structure with two open ends.
Further, the bottom end of the central tube extends out of the friction block.
Furthermore, the lower part of the upper joint is clamped between the central pipe and the backwashing valve outer barrel, and a sealing ring groove is formed in the outer side of the upper joint and used for placing a sealing ring, so that the lower part of the upper joint is tightly connected with the backwashing valve outer barrel.
Furthermore, the upper part of the outer central pipe is positioned between the central pipe and the outer barrel of the backwashing valve, and the top end of the outer central pipe is abutted against the bottom end of the backwashing valve core; and a sealing ring groove is formed in the outer side of the upper part of the outer central pipe and used for placing a backwashing valve special-shaped sealing ring, so that the upper part of the outer central pipe is tightly connected with the backwashing valve outer cylinder.
Further, the outer side of the lower part of the outer central tube is divided into three spaces by two spacer rings, and the three spaces are used for accommodating sealing rubber cylinders.
Furthermore, the lower part of the inner side of the cone is provided with a locking ring, and the locking ring can be meshed with the outer side of the central tube, so that the lower part of the cone and the central tube are locked with each other to prevent falling off.
Furthermore, the sawtooth teeth arranged on the lock ring are meshed with the sawtooth teeth arranged on the central tube.
Has the advantages that: according to the utility model, through the matched setting tool of the self-locking Y221 packer, after the pressure weight is unloaded, the packer is not unsealed, the tubing hanger can be smoothly set into a well mouth, and the well entry tie-back of the tubing string is realized. Because the self-locking mechanism is added in the packer, the packer can still keep a setting state after the packer is set and when the pressure weight is released, and the pipe column on the upper part of the packer is in a free state, thereby reducing the uplink and downlink friction of the sucker rod and the load of the oil pumping unit.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1-upper joint, 2-sealing ring, 3-spring, 4-backwashing valve outer cylinder, 5-backwashing valve core, 6-backwashing valve special-shaped sealing ring, 7-outer central pipe, 8-sealing rubber cylinder, 9-spacing ring, 10-cone, 11-cone backwashing through hole, 12-locking ring, 13-slip, 14-slip seat, 15-reversing main body, 16-friction block, 17-elastic sheet, 18-central pipe, 19-backwashing liquid inlet hole, 20-backwashing channel, 21-reversing slide nail on the central pipe, and 22-reversing main body reversing groove.
Detailed Description
The utility model is illustrated below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.
A self-locking washable well Y221 packer comprises an upper connector 1 and a central pipe 18, wherein a backwashing valve outer cylinder 4, an outer central pipe 7, a cone 10, slips 13, a slip seat 14, a reversing main body 15 and a friction block 16 are arranged on the outer side of the central pipe 18 from top to bottom;
the lower part of the upper joint 1 is clamped between the central pipe 18 and the backwashing valve outer cylinder 4, and a sealing ring groove is formed in the outer side of the upper joint 1 and used for placing a sealing ring 2, so that the lower part of the upper joint 1 is tightly connected with the backwashing valve outer cylinder 4;
the central tube 18 is a hollow pipeline structure with openings at two ends, the top end of the central tube is clamped and communicated with the inner ring of the lower part of the upper joint 1, and the bottom end of the central tube extends out of the friction block 16; meanwhile, a circle of spring 3 is sleeved outside the central pipe 18, the top of the spring 3 abuts against the bottom end of the lower part of the upper joint 1, the bottom of the spring 3 abuts against the top end of the backwashing valve core 5, and the spring 3 plays a pre-tightening and pre-compressing role; the backwashing valve core 5 is positioned between the backwashing valve outer cylinder 4 and the central pipe 18, and a backwashing liquid inlet hole 19 is formed on the corresponding backwashing valve outer cylinder 4 on the outer side of the backwashing valve core;
the annular space between the outer central tube 7 and the central tube 18 forms a backwash channel 20; the upper part of the outer central pipe 7 is positioned between the central pipe 18 and the backwashing valve outer cylinder 4, and the top end of the outer central pipe 7 is propped against the bottom end of the backwashing valve core 5; a sealing ring groove is arranged on the outer side of the upper part of the outer central pipe 7 and used for placing a backwashing valve special-shaped sealing ring 6, so that the upper part of the outer central pipe 7 is tightly connected with the backwashing valve outer cylinder 4; the outer side of the lower part of the outer central tube 7 is divided into three spaces for accommodating the sealing rubber cylinders 8 by two spacer rings 9, and the bottom end of the outer central tube 7 is positioned between the central tube 18 and the cone 10;
the side wall of the cone 10 is provided with a plurality of cone backwashing through holes 11 communicated with the outside, and the plurality of cone backwashing through holes 11 and an annular space formed between the central pipe 18 and the cone 10 form a cone backwashing channel; the lower part of the inner side of the cone 10 is provided with a locking ring 12, and the locking ring 12 can be mutually occluded with the outer side of the central tube 18, so that the lower part of the cone 10 and the central tube 18 are mutually locked to prevent falling off; specifically, the sawtooth teeth arranged on the lock ring 12 are meshed with the sawtooth teeth arranged on the central tube 18;
the upper part of the slips 13 is positioned in the inclined slideway on the outer side of the cone 10, and the lower part of the slips is positioned on the inner side of the slip seat 14;
the bottom end of the slip seat 14 abuts against the top end of the reversing main body 15;
the side wall of the reversing main body 15 is provided with a reversing main body reversing groove 22, a reversing sliding pin 21 arranged on a central pipe on the central pipe 18 is positioned in the reversing main body reversing groove 22 and moves along the reversing main body reversing groove 22, the lower part of the reversing main body 15 is clamped at the inner side of the top of the friction block 16, and an elastic sheet 17 is arranged between the friction block 16 and the central pipe 18.
The working principle of the utility model is as follows:
(1) setting: the pipe column is lowered to a designed position with a tool, lifted, rotated rightwards and lowered, the slips 13 bite the inner wall of the casing pipe, and the pipe column is lowered continuously to compress the sealing ring sleeve space of the sealing rubber sleeve 8 to realize sealing. At the moment, the sawtooth teeth arranged on the inner lock ring 12 of the cone 10 are meshed with the sawtooth teeth arranged on the central tube 18, so that the packer can keep a setting state even if the setting load of the side is dropped;
(2) backwashing: the reverse circulation well flushing construction is needed after the tool seat is sealed, the well flushing liquid is injected into the sleeve, when the annular pressure is greater than the pressure of the pipe column, the backwashing valve core 5 is opened by overcoming the elasticity of the spring 3, the well flushing liquid enters through a backwashing liquid inlet hole 19 arranged on the backwashing valve outer cylinder 4, flows through a backwashing channel 20 and finally enters the lower space of the packer through the cone backwashing through hole 11, and the oil pipe returns out, so that the reverse circulation well flushing is realized;
(3) deblocking: and lifting the pipe column to achieve the designed unsealing load, wherein the locking mechanism is invalid, and the unsealing can be performed by continuously lifting.
Claims (8)
1. A self-locking washable well Y221 packer is characterized by comprising an upper joint and a central pipe, wherein the outer side of the central pipe is provided with a backwashing valve outer cylinder, an outer central pipe, a cone, a slip seat, a reversing main body and a friction block from top to bottom;
the lower part of the upper joint is tightly connected with the backwashing valve outer cylinder; the top end of the central pipe is clamped and communicated with the inner ring of the lower part of the upper joint; meanwhile, a circle of spring is sleeved outside the central pipe, the top of the spring abuts against the bottom end of the lower part of the upper joint, the bottom of the spring abuts against the top end of the backwashing valve core, and the spring plays a pre-tightening and pre-compressing role; the backwashing valve core is positioned between the backwashing valve outer cylinder and the central pipe, and a backwashing liquid inlet hole is formed in the corresponding backwashing valve outer cylinder on the outer side of the backwashing valve core; the annular space between the outer central pipe and the central pipe forms a backwashing channel; the upper part of the outer central pipe is tightly connected with the outer cylinder of the backwashing valve; a sealing rubber cylinder is arranged on the outer side of the outer central tube, and the bottom end of the outer central tube is positioned between the central tube and the cone; the side wall of the cone is provided with a plurality of cone backwashing through holes communicated with the outside, and the plurality of cone backwashing through holes and an annular space formed between the central pipe and the cone form a cone backwashing channel together; the lower part of the cone and the central tube are locked with each other;
the upper part of the slip is positioned in the inclined slideway at the outer side of the cone, and the lower part of the slip is positioned at the inner side of the slip seat; the bottom end of the slip seat is abutted against the top end of the reversing main body; the side wall of the reversing main body is provided with a reversing main body reversing groove, a reversing sliding nail arranged on a central pipe on the central pipe is positioned in the reversing main body reversing groove and moves along the reversing main body reversing groove, the lower part of the reversing main body is clamped on the inner side of the top of a friction block, and an elastic sheet is arranged between the friction block and the central pipe.
2. The self-locking washable well Y221 packer of claim 1, wherein said base pipe is a hollow pipe structure with open ends and an interior.
3. The self-locking washable well Y221 packer of claim 1, wherein a bottom end of said base pipe extends outside of said friction block.
4. The self-locking washable well Y221 packer as claimed in claim 1, wherein the lower part of the upper joint is clamped between the central pipe and the outer barrel of the backwash valve, and a sealing ring groove is formed on the outer side of the upper joint and used for placing a sealing ring, so that the lower part of the upper joint is tightly connected with the outer barrel of the backwash valve.
5. The self-locking washable well Y221 packer of claim 1, wherein the upper part of the outer central pipe is positioned between the central pipe and the outer barrel of the backwashing valve, and the top end of the outer central pipe abuts against the bottom end of the backwashing valve core; and a sealing ring groove is formed in the outer side of the upper part of the outer central pipe and used for placing a backwashing valve special-shaped sealing ring, so that the upper part of the outer central pipe is tightly connected with the backwashing valve outer cylinder.
6. The self-locking washable well Y221 packer of claim 1 or 5, wherein the outer lower central tube portion is divided into three compartments on the outside by two spacer rings for receiving packing elements.
7. The self-locking washable well Y221 packer of claim 1, wherein the lower portion of the inner side of the cone is provided with a locking ring, and the locking ring can be engaged with the outer side of the central tube, so that the lower portion of the cone and the central tube are locked with each other to prevent falling off.
8. The self-locking washable well Y221 packer of claim 7, wherein said locking ring has serrations that interlock with serrations on the base pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122568888.7U CN216517917U (en) | 2021-10-25 | 2021-10-25 | Self-locking washable Y221 packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122568888.7U CN216517917U (en) | 2021-10-25 | 2021-10-25 | Self-locking washable Y221 packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216517917U true CN216517917U (en) | 2022-05-13 |
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ID=81525424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122568888.7U Active CN216517917U (en) | 2021-10-25 | 2021-10-25 | Self-locking washable Y221 packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216517917U (en) |
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2021
- 2021-10-25 CN CN202122568888.7U patent/CN216517917U/en active Active
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