CN107939332B - A kind of degradable floating type protrusion-resisting protective device of packer - Google Patents
A kind of degradable floating type protrusion-resisting protective device of packer Download PDFInfo
- Publication number
- CN107939332B CN107939332B CN201711223949.8A CN201711223949A CN107939332B CN 107939332 B CN107939332 B CN 107939332B CN 201711223949 A CN201711223949 A CN 201711223949A CN 107939332 B CN107939332 B CN 107939332B
- Authority
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- China
- Prior art keywords
- claw
- packing element
- packer
- roller ball
- relocation mechanism
- Prior art date
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- 230000001681 protective effect Effects 0.000 title claims abstract description 21
- 238000012856 packing Methods 0.000 claims abstract description 46
- 210000000078 claw Anatomy 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 7
- 239000007769 metal material Substances 0.000 claims description 6
- 229910001051 Magnalium Inorganic materials 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 3
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- OWXLRKWPEIAGAT-UHFFFAOYSA-N [Mg].[Cu] Chemical compound [Mg].[Cu] OWXLRKWPEIAGAT-UHFFFAOYSA-N 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 235000009854 Cucurbita moschata Nutrition 0.000 description 1
- 240000001980 Cucurbita pepo Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- -1 almag Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 210000000245 forearm Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000020354 squash Nutrition 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- 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 discloses a kind of degradable floating type protrusion-resisting protective devices of packer, including claw relocation mechanism and claw relocation mechanism mounting seat, when work, packing element is compressed axially to be squeezed and be placed at complete circle recessed lid stereochemical structure lower half portion, packing element is compressed axially be radially expanded after, touch with claw top half card tooth and touches, slight circumferential angulation change is occurred by bottom circular groove and roller ball Ball-and-Socket Attachment Structure after catch force, power passes to mandrel, its lower end Inner extrusion compression spring, slight straight-line displacement occurs along telescopic spring amount under the effect of compression spring elastic force to change.The present invention can be effectively prevented packing element in the shoulder protrusion for setting with occurring during pressure-bearing, keep higher contact stress, improve the sealing performance of packing element, extend the service life of packing element, it reduces in operation and frequently changes envelope, be conducive to setting for packer, unsealing operation.
Description
Technical field
The invention belongs to petroleum oil well completion technical field of operation, are related to a kind of protrusion-resisting protective device, specifically, being a kind of envelope
Every the degradable floating type protrusion-resisting protective device of device.
Background technique
The fine or not key of packer sealing quality is contact stress.When packer setting, packing element is axially compressed
After certain value, packing element excessive deformation will form shoulder to the spatial flow between the internal surface of sleeve pipe and tool rigid body at both ends
Portion is prominent, causes contact stress to decline, directly affects airtight quality.Therefore in packing element deformation, it is similar to fully block, hinders
Only this protrusion is very necessary.
Outburst prevention device is to place certain blocker ring, supporting element or other limiting protectors at the end both ends of packing element, is used
Packing element is prominent towards oil sets annular space when preventing and limit packer setting or flows.When packer setting, once packing element
It is deformed to and is contacted with internal surface of sleeve pipe, under external load function, outburst prevention device is just unfolded, covers between packer and internal surface of sleeve pipe
Annular gap prevents packing element prominent towards this annular space, packing element is forced to be in sealing space in each to the state of homogeneous compaction, generates
With keep higher contact stress, to obtain good sealing performance.
The common outburst prevention device of packer mainly uses squash type contact sealing at present, and elastic deformation occurs by material,
The metal parts of the materials such as brass, mild steel, aluminium alloy is installed at packing element end both ends.During entering well, the outer diameter of outburst prevention device
Slightly larger than the outer diameter of packing element, it can protect packing element and do not scratched during going into the well.When packing element is axially compressed
When being radially expanded, metal parts occurs elastic deformation and is close to internal surface of sleeve pipe closure annular gap, prevents packing element excessive deformation and produces
Raw shoulder is prominent.But due to the materials such as packing element and brass, mild steel, aluminium alloy hardness, toughness, in terms of larger difference
It is different, easily cause the separation of packing element Yu mild steel, brass, aluminium alloy, packer is wriggled in addition, more exacerbate outburst prevention device and packing element it
Between peeling, even scratch packing element, and outburst prevention device can be generated and squeeze the phenomenon that ruining, polishing.To cause packer to use
Timeliness is short, and envelope is frequently changed in operation, is unfavorable for the unsealing operation of packer.
There is a kind of anti-lug structure of free-standing expansive ring type.When packing element compression, first by axial force transmission to wedge ring, wedge
Shape circle forces expansion loop radial dilatation, and with being gradually increased for setting force, expansion loop is radially also gradually increased, when setting force reaches
When 35~40kN, expansion loop outer diameter and casing inner diameter are overlapped, and expansion loop can completely enclose the annular gap at packing element.This protrusion-dispelling
Although structure is more novel, packer pressure resistance performance is not satisfactory, also needs more reasonable anti-lug structure that could keep higher
Sealing performance.
Patent (CN 203685115U) describes a kind of packing element protrusion-dispelling ring of permanent packer.In setting process, glue
Cylinder is squeezed dilatancy.Under internal surface of sleeve pipe and packing element collective effect, forearm occurs irreversible protrusion-dispelling ring at easily fold point
The non-resilient bending in ground, up to 90 °, reversibly elasticity bending occurs for postbrachium for maximum bending.Although this device can prevent packing element shoulder
Portion's distinct issues, but application influences the service life of material for a long time, needs to frequently replace protrusion-dispelling component.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of degradable floating type protrusion-resisting protective device of packer,
It is prominent in the shoulder for setting with occurring during pressure-bearing that packing element can be effectively prevented, keep higher contact stress, improve packing element
Sealing performance, extend the service life of packing element, reduce in operation and frequently change envelope, be conducive to setting for packer, unsealing operation.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that: a kind of packer is with degradable floating type
Protrusion-resisting protective device, including claw relocation mechanism and claw relocation mechanism mounting seat, claw relocation mechanism and claw floating engine
Structure mounting seat is sleeved on the outside of packer central tube, and claw relocation mechanism mounting seat includes end cap, bottom cover, core axle hole and spiral shell
Bolt, bottom cover are a disk structure, and disc centre has the centre bore for entangling packing element, and bottom cover is located at the protection of entire protrusion-dispelling
The bottom of device, end cap be with the matched structure of bottom cover, be uniformly distributed circumferentially on disk top surface and be provided with 8 mandrels
Hole, end cap are fixed together by bolt and bottom cover；Claw relocation mechanism includes claw, roller ball, mandrel, pressure bullet
Spring, step groove washer and Ka Ya, claw are the L shape stereochemical structure that annulus cuts 8 equal parts, are divided into vertical top half and water
Flat lower half portion, top half are in arc-shaped, and back outer profile is in stepped chamfers formula structure, and lower half portion is in arc-shaped, play branch
The effect of packing element boss is supportted, the bottom of lower half portion is provided with bottom circular groove, and mandrel bottom centre is with installation pressure
The concave mounting groove of power spring, mandrel top are fixedly connected with roller ball, and roller ball is inserted into bottom circular groove and connects in ball-and-socket hinge style
It is connected together, step groove washer is in step groove shape, and step groove washer is fixedly connected on bottom circular groove by screw
Bottom periphery, diameter is more smaller than rolling bulb diameter at ladder, is in contact at roller ball bottom and step groove washer ladder, support
Roller ball prevents roller ball from disengaging from bottom circular inside grooves, and mandrel lower part is inserted into core axle hole, in compression spring top
It sets in concave mounting groove, bottom end is fixed on bottom cover, so that mandrel is moved up and down in compression spring elastic force position and is made card
The bottom surface of pawl is not contacted with end cap；Card tooth is zigzag structure, is tightened in inside claw stereochemical structure top half by jackscrew,
When setting, packing element, which is compressed axially, is radially expanded the close contact of rear and card tooth.
The top half of the claw and the design of lower half portion junction have smooth rounded corner.
The claw is made of degradable metal material, and degradable metal material is magnesium alloy, almag, magnesium copper
At least one of materials such as alloy, magnesium-zinc alloy, magnalium nickel alloy.
The beneficial effects of the present invention are: slight angle can not only occur using the degradable floating type protrusion-resisting protective device
Change with displacement, there is floating adjustment effect, and can degrade automatically in underground and lose protrusion-dispelling protective effect, it is structurally reasonable,
Securely and reliably, the shoulder that can be effectively prevented packing element is prominent, keeps higher contact stress, improves the sealing performance of packing element,
Be conducive to setting for packer, unsealing operation.
Detailed description of the invention
Fig. 1 is degradable floating type protrusion-resisting protective device schematic diagram of internal structure of the invention；
Fig. 2 is degradable floating type protrusion-resisting protective device claw schematic perspective view of the invention；
Fig. 3 is degradable floating type protrusion-resisting protective device claw back outer profile structure top view of the invention；
Fig. 4 is that degradable floating type protrusion-resisting protective device card tooth and packing element of the invention contact schematic diagram.
Specific embodiment
Foregoing invention content of the invention is described in further detail With reference to embodiment.But it should not incite somebody to action
This range for being interpreted as the above-mentioned theme of the present invention is only limitted to following embodiments.Do not separating the above-mentioned technical idea situation of the present invention
Under, according to ordinary skill knowledge and customary means, various replacements and change are made, the scope of the present invention should all be included in
It is interior.
As shown in Figs 1-4, packer of the invention degradable floating type protrusion-resisting protective device, including claw relocation mechanism
With claw relocation mechanism mounting seat, claw relocation mechanism and claw relocation mechanism mounting seat are sleeved on packer central tube 16
Outside, claw relocation mechanism mounting seat include end cap 11, bottom cover 12, core axle hole 13 and bolt 14, and bottom cover 12 is a disc type
Structure, disc centre have the centre bore 16 for entangling packing element, and bottom cover 12 is located at the bottom of entire protrusion-resisting protective device,
End cap 11 be with the matched structure of bottom cover 12, be uniformly distributed circumferentially on disk top surface and be provided with 8 core axle holes 13, end cap 11
It is fixed together by bolt 14 and bottom cover 12；Claw relocation mechanism 1 includes claw 9, roller ball 3, mandrel 4, pressure bullet
Spring 6, step groove washer 8 and Ka Ya 10, claw (9) are the L shape stereochemical structure that annulus cuts 8 equal parts, are divided into vertical upper half
Part 9a and horizontal lower half portion 9b, top half 9a are in arc-shaped, and back outer profile 9d is in stepped chamfers formula structure, lower half
Dividing 9b is in arc-shaped, plays 15 boss of combination wall and anchor packer packing element, and the bottom of lower half portion 9b is provided with bottom circular groove 2,
Concave mounting groove 5 of 4 bottom centre of mandrel with installation compression spring 6,4 top of mandrel are fixedly connected with roller ball 3, roller ball
3 insertion bottom circular grooves 2 link together in ball-and-socket hinge style, and step groove washer 8 is in step groove shape, step groove washer 8
It is fixedly connected on 2 bottom periphery of bottom circular groove by screw 7, diameter is more smaller than 3 diameter of roller ball at ladder, roller ball 3
It is in contact at bottom and 8 ladder of step groove washer, supports roller ball 3, prevent roller ball 3 from taking off inside bottom circular groove 2
It opens, 4 lower part of mandrel is inserted into core axle hole 13, and 6 top of compression spring is built in concave mounting groove 5, and bottom end is fixed on bottom cover
On 12, so that mandrel 4 is moved up and down in compression spring elastic force position and contact the bottom surface of claw 9 not with end cap 11；Card tooth
10 be zigzag structure, is tightened in inside 9 stereochemical structure top half 9a of claw by jackscrew, when setting, the axial pressure of packing element 15
It is in close contact after contracting is radially expanded with card tooth 10.
The top half 9a of the claw 9 and the design of the junction lower half portion 9b have smooth rounded corner.
The claw 9 is made of degradable metal material, and degradable metal material is magnesium alloy, almag, magnesium
At least one of materials such as copper alloy, magnesium-zinc alloy, magnalium nickel alloy.
When work, packing element 15 is compressed axially to be squeezed and be placed at complete circle recessed lid stereochemical structure lower half portion 9b, glue
It after cylinder 15 is compressed axially and is radially expanded, is in close contact with 9 top half 9a card tooth 10 of claw, passes through bottom after 9 stress of claw
Slight circumferential angulation change occurs for portion's circular groove 2 and 3 Ball-and-Socket Attachment Structure of roller ball；Power passes to mandrel 4, in lower end
Portion's squeeze pressure spring 6 occurs slight straight-line displacement along telescopic spring amount under the effect of 6 elastic force of compression spring and changes.As a result, 8
A claw fits together the recessed lid stereochemical structure of a complete circle of composition in ball-and-socket hinge style structure and spring by 360 ° of centric angle
Slight angle occurs for the lower synergistic effect of structure elastic force effect and displacement changes, and realizes that the floating of circumferencial direction is adjusted, is equivalent to circle
The recessed lid stereochemical structure top half 9a radius of shape becomes larger, to realize the floating type adjustment of displacement of protrusion-resisting protective device.Packer needs
When unsealing, claw 9 can degrade automatically, lose protrusion-dispelling protective effect, be conducive to the smooth unsealing operation of packing element 15.This device
It is prominent in the shoulder for setting with occurring during pressure-bearing that packing element can be effectively prevented, higher contact stress is kept, improve glue
The sealing performance of cylinder extends the service life of packing element, reduces in operation and frequently changes envelope, be conducive to packer sets operation.
In conclusion the contents of the present invention are not limited in the above embodiments, the knowledgeable people in same area can
Can propose other embodiments easily within technological guidance's thought of the invention, but this embodiment is included in this hair
Within the scope of bright.
Claims (3)
1. a kind of degradable floating type protrusion-resisting protective device of packer, which is characterized in that including claw relocation mechanism and claw
Relocation mechanism mounting seat, claw relocation mechanism and claw relocation mechanism mounting seat are sleeved on packer central tube (16) outside
Side, claw relocation mechanism mounting seat include end cap (11), bottom cover (12), core axle hole (13) and bolt (14), and bottom cover (12) is
One disk structure, disc centre have the centre bore for entangling packing element, and bottom cover (12) is located at entire protrusion-resisting protective device
Bottom, end cap (11) be with bottom cover (12) matched structure, be uniformly distributed on end cap (11) and be provided with 8 core axle holes
(13), end cap (11) is fixed together by bolt (14) with bottom cover (12)；Claw relocation mechanism (1) include claw (9),
Roller ball (3), mandrel (4), compression spring (6), step groove washer (8) and card tooth (10), claw (9) are annulus cutting 8 etc.
The L shape stereochemical structure divided, is divided into vertical top half (9a) and horizontal lower half portion (9b), and top half (9a) is in circular arc
Shape, back outer profile (9d) are in stepped chamfers formula structure, and lower half portion (9b) is in arc-shaped, it is convex to play combination wall and anchor packer packing element (15)
The effect of platform, the bottom of lower half portion (9b) are provided with bottom circular groove (2), and mandrel (4) bottom centre is with installation pressure bullet
The concave mounting groove (5) of spring (6), mandrel (4) top are fixedly connected with roller ball (3), and roller ball (3) is inserted into bottom circular groove
(2) it links together in ball-and-socket hinge style, step groove washer (8) is in step groove shape, and step groove washer (8) passes through screw (7)
It is fixedly connected on bottom circular groove (2) bottom periphery, diameter is more smaller than roller ball (3) diameter at ladder, roller ball (3) bottom
It is in contact, supports roller ball (3) at step groove washer (8) ladder, prevent roller ball (3) out of bottom circular groove (2)
Portion disengages, and mandrel (4) lower part is inserted into core axle hole (13), and compression spring (6) top is built in concave mounting groove (5), bottom
End is fixed on bottom cover (12), move up and down mandrel (4) can in compression spring elastic force position and make the bottom surface of claw (9) with
End cap (11) does not contact；Card tooth (10) is zigzag structure, is tightened in claw (9) stereochemical structure top half (9a) by jackscrew
Inside, when setting, packing element (15), which is compressed axially, is radially expanded the close contact of rear and card tooth (10).
2. the degradable floating type protrusion-resisting protective device of packer according to claim 1, which is characterized in that the claw
(9) top half (9a) and the design of the lower half portion junction (9b) has smooth rounded corner.
3. the degradable floating type protrusion-resisting protective device of packer according to claim 1, which is characterized in that the claw
(9) it is made of degradable metal material, degradable metal material is magnesium alloy, almag, magnesium copper alloy, the conjunction of magnesium zinc
At least one of gold, magnalium nickel alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711223949.8A CN107939332B (en) | 2017-11-27 | 2017-11-27 | A kind of degradable floating type protrusion-resisting protective device of packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711223949.8A CN107939332B (en) | 2017-11-27 | 2017-11-27 | A kind of degradable floating type protrusion-resisting protective device of packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107939332A CN107939332A (en) | 2018-04-20 |
| CN107939332B true CN107939332B (en) | 2019-08-20 |
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|---|---|---|---|
| CN201711223949.8A Active CN107939332B (en) | 2017-11-27 | 2017-11-27 | A kind of degradable floating type protrusion-resisting protective device of packer |
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| Country | Link |
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| CN (1) | CN107939332B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116446820B (en) * | 2023-04-27 | 2023-10-31 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587022A (en) * | 1981-07-03 | 1983-01-14 | 林 ▲あ▼哲 | Stake constructing method and apparatus |
| CN2782916Y (en) * | 2005-03-23 | 2006-05-24 | 中国石油化工股份有限公司中原油田分公司采油工程技术研究院 | Protective device for packer rubber tube |
| CN202194615U (en) * | 2011-08-25 | 2012-04-18 | 中国石油天然气股份有限公司 | Protection structure of rubber drum of packer |
| CN203296745U (en) * | 2013-05-30 | 2013-11-20 | 上海优强石油科技有限公司 | Rubber sleeve protection device of packer |
| CN204877370U (en) * | 2014-04-08 | 2015-12-16 | 兰州海默科技股份有限公司 | Abrupt protection device is prevented to compression packer |
| CN105781479B (en) * | 2016-04-20 | 2018-11-16 | 西南石油大学 | Outburst prevention device |
| CN106639964A (en) * | 2017-03-10 | 2017-05-10 | 西南石油大学 | High leakproofness shoulder-protrusion resistant compression type packer |
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2017
- 2017-11-27 CN CN201711223949.8A patent/CN107939332B/en active Active
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Effective date of registration: 20211105 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd., No. 83, Second Street, economic and Technological Development Zone, Binhai New Area, Tianjin, 300457 Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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