CN110331959A - A kind of capping tools - Google Patents
A kind of capping tools Download PDFInfo
- Publication number
- CN110331959A CN110331959A CN201910698402.6A CN201910698402A CN110331959A CN 110331959 A CN110331959 A CN 110331959A CN 201910698402 A CN201910698402 A CN 201910698402A CN 110331959 A CN110331959 A CN 110331959A
- Authority
- CN
- China
- Prior art keywords
- packing element
- slips
- retaining ring
- cone
- capping tools
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012856 packing Methods 0.000 claims abstract description 71
- 230000001012 protector Effects 0.000 claims abstract description 5
- 230000015556 catabolic process Effects 0.000 claims description 6
- 238000006731 degradation reaction Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 10
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 2
- 241001074085 Scophthalmus aquosus Species 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000000518 rheometry Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 240000005546 Piper methysticum Species 0.000 description 2
- 235000016787 Piper methysticum Nutrition 0.000 description 2
- 229920000954 Polyglycolide Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004633 polyglycolic acid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 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
- 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 present invention provides a kind of capping tools, capping tools include mandrel, it is disposed with pin thread thread protector, upper retaining ring, top slips, upper cone, top retaining ring, top packing element, intermediate packing element, lower part packing element, lower part retaining ring, lower cone, lower slips, lower retaining ring, guide shoe from top to bottom in mandrel exterior, is provided with liner body between mandrel and upper packing element, intermediate packing element, lower rubber cylinder.The technology has the advantage that the structure of upper lower cone, mandrel and liner body composition can play the role of limiting packing element compression displacement compared with existing brill bridge plug technology, excessive active force is avoided to be crushed packing element, cause to lose sealing function, improves sealing effect；The outer surface of slips and inner surface are uniformly distributed fluted, can prevent from blocking in advance, reduce stress concentration effect, improve leakproofness.
Description
Technical field
The present invention relates to oil and gas exploration and development technical field more particularly to a kind of capping tools.
Background technique
In recent years, as hypotonic, fine and close oil-gas reservoir obtains large scale mining, multistage fracturing technique is widely used in oil gas increasing
Production field.In fracturing process, need to build the pressure effect using capping tools formation in the wellbore to generate hydraulic fracture with ditch
Logical reservoir.And capping tools used at present are all to be copied on the tool that external You Fu company provides mostly, due to
External You Fu company only provides Site Service mostly, does not sell capping tools, therefore develop with independent intellectual property right
Down-hole plugging tool be of great significance for breaking external monopolization.
By the research of domestic scholars, a part of capping tools are had now been developed at present.But it is sending out in actual use
There is the problems such as blocking in advance, poor sealing effect during tripping in pit shaft in now current capping tools.
Summary of the invention
In order to solve the above problems, the present invention provides a kind of capping tools, which has and prevents from mentioning
The advantages of preceding closure, good airproof performance.
A kind of capping tools, capping tools main body be mandrel, mandrel exterior be disposed with from top to bottom pin thread thread protector,
Upper press ring, top slips, upper cone, top retaining ring, packing element, lower part retaining ring, lower cone, lower slips, lower pressure ring, guide shoe, in core
Axis and upper packing element, intermediate packing element are provided with liner body between lower rubber cylinder, and the mandrel and the liner body are circular tube shaped, the mandrel
Outer round surface and the liner body internal circular surfaces are cooperatively connected, and the liner body outer round surface and the packing element inner surface are cooperatively connected.
Further, the packing element is seperated packing element, and the packing element includes top packing element, intermediate packing element and lower part packing element.
Further, intermediate packing element hardness is lower than top packing element and lower part packing element.
Further, the capping tools select degradation material production.
Further, upper slips and lower slips are all the hollow taper cylinder of variable diameter, the upper slips and lower slips outer surface
With several equally distributed external grooves, upper slips and lower slips are divided into several valve slips bodies by external groove, slips body
Quantity is identical as external groove quantity, and external groove is running through upper slips wall and lower slips wall close to cone segments, far from cone end slot
It is deep to be less than upper slips wall thickness and lower slips wall thickness.
Further, upper slips and lower slips are evenly arranged with inner groovy, indent groove depth close to the inner surface of cone segments
Less than upper slips and lower slips wall thickness, and indent groove depth is successively decreased with far from cone.
Further, the top retaining ring of capping tools and lower part retaining ring are variable diameter ring bodies, top retaining ring and lower part retaining ring
Outer surface has several equally distributed external grooves, and external groove is running through retaining ring wall close to cone segments, far from cone end slot
Deep to be less than retaining ring wall thickness, top retaining ring and lower part retaining ring inner surface are the circular conical surface at certain inclination angle, top retaining ring and lower part retaining ring
One end inner surface and packing element circular conical surface cooperate, other end anchor ring and cone annulus groove face cooperate.
The present invention provides a kind of capping tools, have the advantage that compared with prior art
(1) structure of lower cone, mandrel and liner body composition can play the role of limiting packing element compression displacement on, avoid
Big active force is crushed packing element, causes to lose sealing function, improves sealing effect.
(2) outer surface of slips and inner surface are uniformly distributed fluted, can be prevented from blocking in advance, be reduced stress concentration effect
It answers, improve sealing performance.
(3) top retaining ring and lower part retaining ring can prevent packing element rheology to weaken sealing performance.
Detailed description of the invention:
Fig. 1 core shaft structure schematic diagram；
Fig. 2 capping tools structural schematic diagram；
Fig. 3 limits packing element compression displacement schematic diagram；
Fig. 4 kava structure schematic diagram；
Fig. 5 fission packing element structural schematic diagram；
Fig. 6 retaining ring structure schematic diagram；
Fig. 7 retaining ring prevents packing element rheology schematic diagram；
In figure: mandrel 1, pin thread thread protector 2, upper press ring 3, upper slips 4, upper cone 5, top retaining ring 6, top packing element 7, centre
Packing element 8, lower part packing element 9, lower part retaining ring 10, lower cone 11, lower slips 12, lower pressure ring 13, guide shoe 14, be pumped into ring 15, casing 16,
Liner body 17.
Specific embodiment:
In the following description, when being related to specific direction and illustrating, using close to shaft bottom end as lower part, be upper close to uphole end
Portion.
As shown in Figs. 1-2, the present invention provides a kind of capping tools.Capping tools include mandrel 1, outside mandrel 1 from
Top to bottm is disposed with pin thread thread protector 2, upper press ring 3, top slips 4, upper cone 5, top retaining ring 6, top packing element 7, centre
Packing element 8, lower part packing element 9, lower part retaining ring 10, lower cone 11, lower slips 12, lower pressure ring 13, guide shoe 14, in mandrel 1 and top glue
Cylinder 7, intermediate packing element 8 are provided with liner body 17 between lower part packing element 9.
Further, capping tools select degradation material.Degradable magnesium aluminium alloy can be selected in degradation material, degradable
Magnesium alloy has the characteristics that density is small, intensity is high, processability is good, and electricity can occur for degradable magnesium aluminium alloy in subsurface environment
Chemical attack, to degrade.In addition, polyglycolic acid also can be selected in degradation material, polyglycolic acid optimizes through ovennodulation, has
There are the intensity and mechanical property close to magnesium alloy, and hydrolysis occurs in subsurface environment, is finally degraded to water and dioxy
Change carbon.
In capping tools, mandrel 1 is the main structure of isolating tool, and mandrel 1 is integrated the tubular structure of machine-shaping.
1 outer round surface of mandrel and 17 internal circular surfaces of liner body are cooperatively connected, 17 outer round surface of liner body and intermediate packing element 8, lower part
The inner surface mating connection of packing element 9, lower part retaining ring 110.In order to ensure the sealing between mandrel 1 and liner body 17, in 1 appearance of mandrel
The cooperation position at face and 17 both ends of liner body is provided with annular groove, for installing sealing ring.
Referring to Fig. 3, two ends of mandrel 1 are threadedly coupled with upper cone 5 and lower cone 11 respectively, in order to realize sealing,
Sealing ring is provided at link position.The structure that upper cone 5, lower cone 11 and liner body 17 form can play limitation packing element pressure
It condenses the effect of shifting, avoids excessive active force from being crushed packing element, cause to lose sealing function.
Capping tools will be completed to block in underground, need to use perforating gun tripping in capping tools, then penetrating by perforating gun
Bullet explosion in hole generates axial motive force.Under the action of axial motive force, slips is slided and is opened along the conical surface expansion of cone,
Close active force is generated between casing.Meanwhile packing element is also by axial motive force, to be pushed and be occurred radial
Sealing is realized in expansion.
When tripping in capping tools are into well, capping tools are primarily subjected to the gravity of perforating gun and rush with the transverse direction of pit shaft
Hit power, it is therefore desirable in tripping in capping tools, it is ensured that the endurance of capping tools not will lead to capping tools failure.
And in capping tools failure, discovery slips is the knot for being most susceptible to impact force in capping tools and destroying
Structure.Find that existing slips when being generated radial expansion by cone axial force, is easy along the single crack of slips outer wall simultaneously
Extension.By using numerical simulation software analysis, inventor discovery this is because slips upper stress concentrate caused by, due to card
Watt discontinuity, thus in radial expansion also can not uniform expansion, stress concentration phenomenon is generated, so as to cause " C " type
Destruction.
Based on above-mentioned factor, inventor improves kava structure, referring to fig. 4.
Further, upper slips 4 and lower slips 12 are the hollow taper cylinder of variable diameter, 12 outer surface of upper slips 4 and lower slips
With several equally distributed external grooves, upper slips 4 and lower slips 12 are divided into several valve slips bodies, slips body by external groove
Quantity it is identical as external groove quantity.External groove is running through slips wall thickness close to cone segments, is being less than card far from cone segments groove depth
Watt wall thickness.
Further, upper slips 4 and lower slips 12 are also evenly arranged with inner groovy, inner groovy close to the inner surface of cone segments
Depth is less than slips wall thickness, and indent groove depth is successively decreased with far from cone.
Slip insert is axially distributed on slips body, slip insert is embedded in internal surface of casing during closure, to realize close
Envelope and pressure-bearing.
The structure setting of the external groove of slips and inner groovy through the invention, when slips is by impact force, slips can
Certain radial deformation is generated, is failed in advance so as to avoid capping tools.Meanwhile above structure is it is also possible that slips is radial
Extension is more uniformly stressed when destroying, therefore more preferable with the anchoring effect of casing after slips opening, provides better sealing
Energy.
It should be noted that upper slips 4 and lower slips 12 can use identical mode arranged symmetrically.
Further, inventor has found that the mode of heat treatment still can generate serious abrasion when processing slips, i.e., hot
Processing mode is not able to satisfy the hardness requirement of biodegradable card watt, therefore uses slips surface in the present invention and coat Ni-based conjunction
The method of gold plating.On the one hand the presence of coating can guarantee slips hardness requirement, on the other hand can be before pressing crack construction
Guarantee the degradation speed of reduction slips, and after pressure break, since the partial coating quilt cover tube wall on slips surface destroys, increase
The exposure level of slips and formation fluid, it can accelerate slips post-fracturing solution rate, this greatly meets Party A
The demand gone into operation is needed after pressure.
For the packing element of capping tools using seperated packing element, seperated packing element includes top packing element 7, intermediate packing element 8, lower part packing element
10, wherein intermediate 8 hardness of packing element is lower than the packing element at both ends.The high rigidity packing element on both sides ensure that the bearing capacity of packing element, intermediate
Position soft packing element ensure that the leakproofness of bridge plug.
Further, in order to guarantee that there is good leakproofness after packing element seals, retaining ring is also provided in capping tools
(referring to Fig. 6).Retaining ring is variable diameter ring bodies, and retaining ring outer surface has several equally distributed external grooves, and external groove is close
Cone segments run through retaining ring wall, are being less than retaining ring wall thickness far from cone segments groove depth.Retaining ring inner surface is the circular conical surface at certain inclination angle, shield
One end inner surface of ring can cooperate with the packing element circular conical surface at both ends, prevent packing element rheology to weaken sealing performance.Retaining ring
Other end anchor ring and cone annulus groove face cooperate.
The action principle of retaining ring is referring to Fig. 7, and under axial thrust effect, cone thrust is in retaining ring, since retaining ring is remote
Radial deformation occurs for one end of the presence of cone segments groove, retaining ring, constitutes to blocking the packing element of deformation in two retaining rings
Confined space in, play the role of preventing packing element rheology.It will be understood by those skilled in the art that when retaining ring deforms bigger, shield
Contact of the ring with casing wall is closer, therefore stronger to " closure " function and effect of packing element, and sealing performance is better.
It should be noted that top retaining ring 6 and lower part retaining ring 10 use identical mode arranged symmetrically.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (7)
1. a kind of capping tools, it is characterised in that: capping tools main body is mandrel, is disposed with from top to bottom in mandrel exterior
Pin thread thread protector, upper press ring, top slips, upper cone, top retaining ring, packing element, lower part retaining ring, lower cone, lower slips, lower pressure ring,
Guide shoe is provided with liner body between mandrel and upper packing element, intermediate packing element, lower rubber cylinder, and the mandrel and the liner body are circular tube shaped,
The mandrel outer round surface and the liner body internal circular surfaces are cooperatively connected, and the liner body outer round surface is matched with the packing element inner surface
Close connection.
2. capping tools according to claim 1, it is characterised in that: the packing element is seperated packing element, and the packing element includes
Top packing element, intermediate packing element and lower part packing element.
3. capping tools according to claim 2, it is characterised in that: the intermediate packing element hardness is lower than the top packing element
With the lower part packing element.
4. capping tools according to claim 1, it is characterised in that: the capping tools select degradation material production.
5. capping tools according to claim 1, it is characterised in that: upper slips and lower slips are all the hollow taper of variable diameter
Cylinder, the upper slips and lower slips outer surface have several equally distributed external grooves, and external groove is by upper slips and lower slips
It is divided into several valve slips bodies, the quantity of slips body is identical as external groove quantity, and external groove is running through upper slips close to cone segments
Wall and lower slips wall are being less than upper slips wall thickness and lower slips wall thickness far from cone segments groove depth.
6. capping tools according to claim 1, it is characterised in that: the inner surface of upper slips and lower slips close to cone segments
It is evenly arranged with inner groovy, indent groove depth is less than upper slips and lower slips wall thickness, and indent groove depth is passed with far from cone
Subtract.
7. capping tools according to claim 1, it is characterised in that: capping tools top retaining ring is variable diameter ring bodies, on
Portion retaining ring outer surface has several equally distributed external grooves, and external groove is running through retaining ring wall close to epicone body end, separate
Upper cone end slot is less than top retaining ring wall thickness deeply, and top retaining ring inner surface is the circular conical surface at certain inclination angle, one end of top retaining ring
Inner surface and packing element circular conical surface cooperate, and other end anchor ring and cone annulus groove face cooperate, and lower part retaining ring is adopted in a like fashion
It is symmetrical arranged with top retaining ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698402.6A CN110331959B (en) | 2019-07-31 | 2019-07-31 | Plugging tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910698402.6A CN110331959B (en) | 2019-07-31 | 2019-07-31 | Plugging tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110331959A true CN110331959A (en) | 2019-10-15 |
| CN110331959B CN110331959B (en) | 2020-07-17 |
Family
ID=68148172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910698402.6A Expired - Fee Related CN110331959B (en) | 2019-07-31 | 2019-07-31 | Plugging tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110331959B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441741A (en) * | 2020-05-08 | 2020-07-24 | 中国石油天然气集团有限公司 | Soluble pumpable open type temporary bridge plug tool and use method thereof |
| CN111764862A (en) * | 2020-06-29 | 2020-10-13 | 中国石油天然气集团有限公司 | Rubber cylinder end omnibearing protection end ring |
| CN113250648A (en) * | 2020-02-07 | 2021-08-13 | 四川维泰科创石油设备制造有限公司 | Soluble metal sealing card seat |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250648A (en) * | 2020-02-07 | 2021-08-13 | 四川维泰科创石油设备制造有限公司 | Soluble metal sealing card seat |
| CN113250648B (en) * | 2020-02-07 | 2024-05-28 | 四川维泰科创石油设备制造有限公司 | Soluble metal seal clamping seat |
| CN111441741A (en) * | 2020-05-08 | 2020-07-24 | 中国石油天然气集团有限公司 | Soluble pumpable open type temporary bridge plug tool and use method thereof |
| CN111441741B (en) * | 2020-05-08 | 2023-09-29 | 中国石油天然气集团有限公司 | Soluble pumpable open temporary plugging bridge plug tool and use method |
| CN111764862A (en) * | 2020-06-29 | 2020-10-13 | 中国石油天然气集团有限公司 | Rubber cylinder end omnibearing protection end ring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110331959B (en) | 2020-07-17 |
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