CN113775314A - Double-acting external packer rubber sleeve suitable for petroleum well completion - Google Patents
Double-acting external packer rubber sleeve suitable for petroleum well completion Download PDFInfo
- Publication number
- CN113775314A CN113775314A CN202010516128.9A CN202010516128A CN113775314A CN 113775314 A CN113775314 A CN 113775314A CN 202010516128 A CN202010516128 A CN 202010516128A CN 113775314 A CN113775314 A CN 113775314A
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- packing element
- ring
- rubber cylinder
- rubber sleeve
- rubber
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to a rubber sleeve of a double-acting external packer suitable for petroleum well completion, which comprises a left baffle ring, a rubber sleeve and a right baffle ring, wherein: the packing element is by outer packing element, support packing element and the radial superimposed combination packing element structure of interior packing element three-layer packing element, and outer packing element and interior packing element adopt from expanding material to make, and the combination packing element structure sets up and keeps off between the ring at a left side and keep off the ring at the right side, is equipped with airtight stock solution chamber including inside the packing element to set up in one side in stock solution chamber and annotate liquid hole and check valve. The invention has the advantages that: (1) the full setting of the rubber cylinder can be realized under the combined action of two modes of compression and self-expansion when meeting oil and water; (2) the outer rubber barrel and the inner rubber barrel are both made of rubber which can automatically expand when meeting oil and water, and both have the function of automatically expanding when meeting oil and water, so that the contact stress between the rubber barrel and the well wall is increased, and the setting effect is guaranteed; (3) the inner surface of the liquid storage cavity of the inner rubber sleeve is provided with a slow release coating to prevent the rubber sleeve from being set in advance in the process of going into the well, so that the construction safety of well completion operation is guaranteed.
Description
Technical Field
The invention relates to an external packer rubber sleeve in the field of petroleum well completion in the field of well completion tools.
Background
An external tubular packer is a well completion tool commonly used in petroleum well completion operations. The method has the main function of realizing the isolation between oil and gas layers with different pressures (or temperatures) or between the oil and gas layers and non-production layers (such as water layers) so as to achieve the purpose of preventing the mutual interference of fluids with different properties or pressure systems between different layers, thereby realizing the respective exploitation of the production layers, increasing the recovery ratio of an oil well and achieving the purpose of maximizing the development benefit of the oil well. The rubber sleeve is a core component of the external packer, and realizes the functions of contacting with a well wall (or a casing) and sealing an annular space. The conventional packer rubber barrel realizes setting in a hydraulic or mechanical mode. After the self-expanding rubber is contacted with substances such as water, hydrocarbon and the like, the volume is automatically expanded until the self-expanding rubber is contacted with a well wall, and stable annular isolation is formed. Both of these approaches have their own advantages. Therefore, how to combine the two setting modes and realize the continuous and stable pressure bearing of the rubber sleeve of the external packer is the development direction of the well completion technology.
Disclosure of Invention
The invention aims to combine the advantages of extrusion type setting and self-expansion type setting to realize continuous sealing of an external packer rubber sleeve, and provides a double-acting external packer rubber sleeve which is reasonable in structural design, simple, reliable and suitable for petroleum well completion.
A dual-acting external packer packing element suitable for oil well completion, comprising a left baffle ring, a packing element and a right baffle ring, wherein: the packing element is by outer packing element, support packing element and the radial superimposed combination packing element structure of interior packing element three-layer packing element, and outer packing element and interior packing element adopt from expanding material to make, and the combination packing element structure sets up and keeps off between the ring at a left side and keep off the ring at the right side, is equipped with airtight stock solution chamber including inside the packing element to set up in one side in stock solution chamber and annotate liquid hole and check valve.
The above scheme further comprises:
the left baffle ring or the right baffle ring is of a circular ring structure, a circular hole is formed in the center of the left baffle ring or the right baffle ring, and an inclined plane with an angle of 45 degrees is formed inside the left baffle ring or the right baffle ring. The outer rubber cylinder is of a circular structure, the outer diameter of the middle part is larger than the outer diameters of the two sides, a sawtooth-shaped groove is formed in the inner side of the middle part, and one end of the sawtooth-shaped groove is an inclined plane with an angle of 45 degrees and is matched with the left retaining ring or the right retaining ring; the supporting rubber cylinder is of a circular structure, the outer side of the middle part of the supporting rubber cylinder is provided with a saw-toothed bulge, the inner side of the middle part of the supporting rubber cylinder is provided with a saw-toothed groove, and one end part of the supporting rubber cylinder is an inclined plane with an angle of 45 degrees and is matched with the left retaining ring or the right retaining ring; the inner rubber cylinder is of a circular structure, and the outer side of the middle part of the inner rubber cylinder is provided with a saw-toothed bulge.
Or the left retaining ring and the right retaining ring are both of circular ring structures, the center part of the left retaining ring and the right retaining ring is provided with a circular hole, and an inclined plane with an angle of 45 degrees is arranged inside the left retaining ring and the right retaining ring. The outer rubber cylinder is of a circular structure, the outer diameter of the middle part is larger than the outer diameters of the two sides, a sawtooth-shaped groove is formed in the inner side of the middle part, and two inclined planes with 45-degree angles at the end parts are respectively matched with the left retaining ring or the right retaining ring; the supporting rubber cylinder is of a circular structure, the outer side of the middle part of the supporting rubber cylinder is provided with a sawtooth-shaped bulge, the inner side of the middle part of the supporting rubber cylinder is provided with a sawtooth-shaped groove, and two inclined planes with 45-degree angles at the end parts are respectively matched with the left retaining ring or the right retaining ring.
Furthermore, the outer parts of the left retaining ring and the right retaining ring radially extend to form a centralizing ring.
Further, the outer opposite ends of the left retaining ring and the right retaining ring extend axially to form a limiting convex ring.
Furthermore, the check valve is of a cylindrical structure, a liquid inlet is formed in one side of the check valve, a liquid outlet is formed in the other side of the check valve, and the check valve is connected with the inner rubber cylinder in a bonding mode.
Furthermore, the inner surface of the liquid storage cavity of the inner rubber cylinder is provided with a slow release coating.
The rubber cylinder of the external packer can realize double setting under the double actions of pushing by a plunger or self-expansion after being soaked in liquid. The plunger promotes to sit and seals and can keep off ring or right fender ring through the plunger promotion left side, keeps off outer packing element, support packing element, the interior packing element in ring extrusion middle part, contacts with the wall of a well after the outside uplift of packing element, accomplishes to sit and seals. The sawtooth structures on the outer rubber cylinder, the supporting rubber cylinder and the inner rubber cylinder can prevent sealing failure caused by tearing of the rubber cylinder due to concentrated stress in the deformation process of the rubber cylinder. The self-expansion setting is realized by the property that the self-expansion setting is realized by the oil and water meeting of the outer rubber cylinder and the inner rubber cylinder. Before the packer rubber cylinder enters a well, liquid (water or diesel oil) is firstly injected into a liquid storage cavity of the inner rubber cylinder. After entering the well, the outer rubber cylinder is fully contacted with liquid in the shaft and then expands in volume, and the outer surface of the rubber cylinder is contacted with the well wall to finish setting. The internal surface of the inner rubber cylinder is fully contacted with liquid in the liquid storage cavity, and then the volume expansion is generated, the supporting rubber cylinder and the outer rubber cylinder are further extruded, the contact stress between the outer rubber cylinder and the well wall is increased, and the setting of the rubber cylinder is ensured. The inner surface of the liquid storage cavity of the inner rubber cylinder is provided with a slow release coating which can prevent the inner liquid from being seated in advance after the action of the rubber cylinder.
Compared with the prior art, the double-acting external packer rubber cylinder has the advantages that: (1) the full setting of the rubber cylinder can be realized under the combined action of two modes of compression and self-expansion when meeting oil and water; (2) the outer rubber barrel and the inner rubber barrel are both made of rubber which can automatically expand when meeting oil and water, and both have the function of automatically expanding when meeting oil and water, so that the contact stress between the rubber barrel and the well wall is increased, and the setting effect is guaranteed; (3) the inner surface of the liquid storage cavity of the inner rubber sleeve is provided with a slow release coating to prevent the rubber sleeve from being set in advance in the process of going into the well, so that the construction safety of well completion operation is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a dual acting external packer rubber sleeve suitable for use in petroleum completions according to the present invention.
In the figure: 1-left baffle ring, 2-outer rubber cylinder, 3-support rubber cylinder, 4-one-way valve, 5-inner rubber cylinder and 6-right baffle ring.
Detailed Description
The invention will be described hereinafter from the point of view of embodiments and with reference to the drawings.
Example 1
A double-acting external packer packing suitable for petroleum well completion comprises a left baffle ring 1, a packing and a right baffle ring 6, wherein: the packing element is by outer packing element 2, support packing element 3 and the radial superimposed combined packing element structure of 5 three-layer packing elements of interior packing element, and outer packing element 2 and interior packing element 5 adopt from expanding rubber material to make, and the combined packing element structure sets up and keeps off between ring 1 and the right fender ring 6 at a left side, including packing element 5 inside is equipped with airtight stock solution chamber to set up in the left side in stock solution chamber and annotate liquid hole and check valve 4.
The left baffle ring 1 is of a circular ring structure, a circular hole is formed in the center of the left baffle ring, an inclined plane with an angle of 45 degrees is formed in the circular hole, and the right baffle ring 5 is a common baffle ring. The outer rubber cylinder 2 is of a circular structure, the outer diameter of the middle part is larger than the outer diameters of the two sides, a sawtooth-shaped groove is formed in the inner side of the middle part, the left end part of the sawtooth-shaped groove is an inclined plane with an angle of 45 degrees and is matched with the left retaining ring 1, and the right end part of the sawtooth-shaped groove is in right-angle butt joint with the right retaining ring 5; the supporting rubber cylinder 3 is of a circular structure, the outer side of the middle part of the supporting rubber cylinder is provided with a saw-toothed bulge, the inner side of the middle part of the supporting rubber cylinder is provided with a saw-toothed groove, the left end part of the supporting rubber cylinder is an inclined plane with an angle of 45 degrees and is matched with the left retaining ring 1, and the right end part of the supporting rubber cylinder is in right-angle butt joint with the right retaining ring 5; the inner rubber cylinder 5 is of a circular structure, and the outer side of the middle part of the inner rubber cylinder is provided with a saw-toothed bulge.
Example 2
A double-acting external packer packing suitable for petroleum well completion comprises a left baffle ring 1, a packing and a right baffle ring 6, wherein: the packing element is by outer packing element 2, support packing element 3 and the radial superimposed combined packing element structure of 5 three-layer packing elements of interior packing element, and outer packing element 2 and interior packing element 5 adopt from expanding rubber material to make, and the combined packing element structure sets up and keeps off between ring 1 and the right fender ring 6 at a left side, including packing element 5 inside is equipped with airtight stock solution chamber to set up in the left side in stock solution chamber and annotate liquid hole and check valve 4.
The right baffle ring 1 is of a circular ring structure, a circular hole is formed in the center of the right baffle ring, an inclined plane with an angle of 45 degrees is formed in the right baffle ring, and the left baffle ring 5 is a common baffle ring. The outer rubber cylinder 2 is of a circular structure, the outer diameter of the middle part is larger than the outer diameters of the two sides, a sawtooth-shaped groove is formed in the inner side of the middle part, the right end part of the sawtooth-shaped groove is an inclined plane with an angle of 45 degrees and is matched with the right retaining ring 1, and the left end part of the sawtooth-shaped groove is in right-angle butt joint with the left retaining ring 5; the supporting rubber cylinder 3 is of a circular structure, the outer side of the middle part of the supporting rubber cylinder is provided with a saw-toothed bulge, the inner side of the middle part of the supporting rubber cylinder is provided with a saw-toothed groove, the right end part of the supporting rubber cylinder is an inclined plane with an angle of 45 degrees and is matched with the right retaining ring 5, and the left end part of the supporting rubber cylinder is in a right angle and is butted with the left retaining ring 1; the inner rubber cylinder 5 is of a circular structure, and the outer side of the middle part of the inner rubber cylinder is provided with a saw-toothed bulge.
Example 3
A double-acting external packer packing suitable for petroleum well completion comprises a left baffle ring 1, a packing and a right baffle ring 6, wherein: the packing element is by outer packing element 2, support packing element 3 and the radial superimposed combined packing element structure of 5 three-layer packing elements of interior packing element, and outer packing element 2 and interior packing element 5 adopt from expanding rubber material to make, and the combined packing element structure sets up and keeps off between ring 1 and the right fender ring 6 at a left side, including packing element 5 inside is equipped with airtight stock solution chamber to set up in the left side in stock solution chamber and annotate liquid hole and check valve 4.
The left baffle ring 1 and the right baffle ring 5 are both of circular ring structures, a circular hole is formed in the center of the left baffle ring and a 45-degree inclined plane is formed in the left baffle ring and the right baffle ring. The outer rubber cylinder 2 is of a circular structure, the outer diameter of the middle part is larger than the outer diameters of the two sides, a sawtooth-shaped groove is formed in the inner side of the middle part, and two end parts of the sawtooth-shaped groove are inclined planes with an angle of 45 degrees and are respectively matched with the left retaining ring 1 and the right retaining ring 5; the supporting rubber cylinder 3 is of a circular structure, the outer side of the middle part of the supporting rubber cylinder is provided with a saw-toothed bulge, the inner side of the middle part of the supporting rubber cylinder is provided with a saw-toothed groove, and two end parts of the supporting rubber cylinder are inclined planes with an angle of 45 degrees and are respectively matched with the left retaining ring 1 and the right retaining ring 5; the inner rubber cylinder 5 is of a circular structure, and the outer side of the middle part of the inner rubber cylinder is provided with a saw-toothed bulge.
Example 4
On the basis of the above examples 1, 2 or 3, further:
the outer parts of the left retaining ring and the right retaining ring radially extend to form righting rings, so that the righting rings can be conveniently centered on a shaft or a well wall. The outer opposite ends of the left retaining ring and the right retaining ring extend axially to form limiting convex rings for clamping the outer rubber barrel 2. The check valve is of a cylindrical structure, a liquid inlet is formed in one side of the check valve, a liquid outlet is formed in the other side of the check valve, and the check valve is connected with the inner rubber cylinder in a bonding mode. The inner surface of the liquid storage cavity of the inner rubber cylinder is provided with a slow release coating.
Before the rubber sleeve of the double-acting external packer for petroleum well completion is put into a well, liquid (water or diesel oil) is injected into a liquid storage cavity of an internal rubber sleeve 5 through a one-way valve 4. And then is arranged on an external packer and is lowered into the well along with a completion string.
After the rubber sleeve of the external double-acting pipe packer is lowered to a preset position along with a well completion tool, a piston on the packer pushes the left baffle ring 1 and the right baffle ring 6 to extrude the external rubber sleeve 2, the supporting rubber sleeve 3 and the internal rubber sleeve 5. And the outer diameter of the outer rubber cylinder 2 is expanded until the outer diameter is contacted with the well wall, and setting under the compression action is completed. The sawtooth structures on the outer rubber cylinder 2, the supporting rubber cylinder 3 and the inner rubber cylinder 5 can prevent the rubber from being torn due to the concentrated local stress.
After the inner wall of the inner rubber tube 5 is contacted with the liquid in the liquid storage cavity, the volume expansion is increased, the supporting rubber tube 3 and the outer rubber tube 2 are further extruded, and the secondary setting under the self-expansion effect when meeting oil and water is completed.
The outer rubber sleeve 2 can also expand in volume after being fully contacted with liquid in a well, so that the setting effect of the packer is ensured.
The double-acting external packer rubber cylinder can realize double stable setting under two modes of compression and self-expansion when meeting oil and water.
Claims (9)
1. The utility model provides a double action external pipe packer packing element suitable for oil well completion, includes left fender ring, packing element and right fender ring, its characterized in that: the packing element is by outer packing element, support packing element and the radial superimposed combination packing element structure of interior packing element three-layer packing element, and outer packing element and interior packing element adopt from expanding material to make, and the combination packing element structure sets up and keeps off between the ring at a left side and keep off the ring at the right side, is equipped with airtight stock solution chamber including inside the packing element to set up in one side in stock solution chamber and annotate liquid hole and check valve.
2. A dual acting external packer packing element for use in oil completions as claimed in claim 1, wherein the left or right baffle ring is of annular configuration having a circular hole in the center and a 45 ° angled inside surface.
3. A dual acting external packer packing element suitable for use in oil completion as claimed in claim 2 wherein said outer packing element is of annular configuration, the outside diameter of the middle portion is greater than the outside diameters of both sides, the inside of the middle portion has a serrated groove, one of the ends is beveled at 45 ° and fits with either the left or right stop ring; the supporting rubber cylinder is of a circular structure, the outer side of the middle part of the supporting rubber cylinder is provided with a saw-toothed bulge, the inner side of the middle part of the supporting rubber cylinder is provided with a saw-toothed groove, and one end part of the supporting rubber cylinder is an inclined plane with an angle of 45 degrees and is matched with the left retaining ring or the right retaining ring; the inner rubber cylinder is of a circular structure, and the outer side of the middle part of the inner rubber cylinder is provided with a saw-toothed bulge.
4. A dual acting external packer rubber sleeve suitable for use in oil completions as claimed in claim 1, wherein the left and right barrier rings are each of annular configuration having a circular hole in the center and a 45 ° angled inside surface.
5. A double-acting external packer rubber sleeve suitable for oil completion according to claim 4, wherein the external rubber sleeve is of a circular ring structure, the outer diameter of the middle part is larger than the outer diameters of the two sides, a serrated groove is formed in the inner side of the middle part, and two inclined planes with 45-degree angles at the end parts are respectively matched with the left retaining ring or the right retaining ring; the supporting rubber cylinder is of a circular structure, the outer side of the middle part of the supporting rubber cylinder is provided with a sawtooth-shaped bulge, the inner side of the middle part of the supporting rubber cylinder is provided with a sawtooth-shaped groove, and two inclined planes with 45-degree angles at the end parts are respectively matched with the left retaining ring or the right retaining ring.
6. A double acting external packer rubber sleeve suitable for use in oil completions as claimed in claim 2 or claim 4, wherein the left and right slings have radially extending centralizing rings.
7. A double acting external packer rubber sleeve suitable for use in oil completions as recited in claim 6 wherein the outer opposing ends of the left and right slings extend axially with a set collar.
8. A dual acting external packer packing element suitable for use in petroleum completions as claimed in any one of claims 1 to 5, wherein the one way valve is of cylindrical configuration having a fluid inlet on one side and a fluid outlet on the other side, adhesively bonded to the internal packing element.
9. A dual acting external packer rubber sleeve suitable for use in petroleum completions as claimed in any of claims 1 to 5, wherein the inner surface of the inner rubber sleeve reservoir is provided with a slow release coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010516128.9A CN113775314A (en) | 2020-06-09 | 2020-06-09 | Double-acting external packer rubber sleeve suitable for petroleum well completion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010516128.9A CN113775314A (en) | 2020-06-09 | 2020-06-09 | Double-acting external packer rubber sleeve suitable for petroleum well completion |
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| Publication Number | Publication Date |
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| CN113775314A true CN113775314A (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010516128.9A Pending CN113775314A (en) | 2020-06-09 | 2020-06-09 | Double-acting external packer rubber sleeve suitable for petroleum well completion |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202023528U (en) * | 2011-03-09 | 2011-11-02 | 中国石化集团胜利石油管理局钻井工艺研究院 | Anti-channeling sealing device for side-drilling well window |
| CN204113204U (en) * | 2014-09-10 | 2015-01-21 | 中国石油天然气股份有限公司 | Horizontal well packer |
| CN204186343U (en) * | 2014-10-27 | 2015-03-04 | 诺斯石油工具(天津)有限公司 | A kind of chance liquid Self-expandable packer |
| US20150060088A1 (en) * | 2013-08-29 | 2015-03-05 | Weatherford/Lamb, Inc. | Packer Having Swellable and Compressible Elements |
| CN108278093A (en) * | 2018-01-16 | 2018-07-13 | 诺斯石油工具(天津)有限公司 | A kind of combined type packer and its application method |
| CN212454353U (en) * | 2020-06-09 | 2021-02-02 | 中石化石油工程技术服务有限公司 | Double-acting external packer rubber sleeve suitable for petroleum well completion |
-
2020
- 2020-06-09 CN CN202010516128.9A patent/CN113775314A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202023528U (en) * | 2011-03-09 | 2011-11-02 | 中国石化集团胜利石油管理局钻井工艺研究院 | Anti-channeling sealing device for side-drilling well window |
| US20150060088A1 (en) * | 2013-08-29 | 2015-03-05 | Weatherford/Lamb, Inc. | Packer Having Swellable and Compressible Elements |
| CN204113204U (en) * | 2014-09-10 | 2015-01-21 | 中国石油天然气股份有限公司 | Horizontal well packer |
| CN204186343U (en) * | 2014-10-27 | 2015-03-04 | 诺斯石油工具(天津)有限公司 | A kind of chance liquid Self-expandable packer |
| CN108278093A (en) * | 2018-01-16 | 2018-07-13 | 诺斯石油工具(天津)有限公司 | A kind of combined type packer and its application method |
| CN212454353U (en) * | 2020-06-09 | 2021-02-02 | 中石化石油工程技术服务有限公司 | Double-acting external packer rubber sleeve suitable for petroleum well completion |
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Effective date of registration: 20230613 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant after: SINOPEC Group Applicant after: SINOPEC OILFIELD SERVICE Corp. Applicant after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Applicant after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute Address before: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Applicant before: SINOPEC OILFIELD SERVICE Corp. Applicant before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Applicant before: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute |