CN104389546A - Compressed packer rubber barrel with spacer ring combined spring shoulder pad - Google Patents
Compressed packer rubber barrel with spacer ring combined spring shoulder pad Download PDFInfo
- Publication number
- CN104389546A CN104389546A CN201410688087.6A CN201410688087A CN104389546A CN 104389546 A CN104389546 A CN 104389546A CN 201410688087 A CN201410688087 A CN 201410688087A CN 104389546 A CN104389546 A CN 104389546A
- Authority
- CN
- China
- Prior art keywords
- packing element
- spacer ring
- rubber
- annulus
- limit
- 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.)
- Pending
Links
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 27
- 238000012856 packing Methods 0.000 claims abstract description 140
- 230000006835 compression Effects 0.000 claims description 22
- 238000007906 compression Methods 0.000 claims description 22
- 230000001012 protector Effects 0.000 claims description 13
- 239000013536 elastomeric material Substances 0.000 claims description 6
- 238000005987 sulfurization reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 7
- 239000003292 glue Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000003466 welding Methods 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
- E21B33/122—Multiple string packers
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 specifically provides a compressed packer rubber barrel with a spacer ring combined spring shoulder pad. the compressed packer rubber barrel is characterized in that a rubber barrel body comprises two side rubber barrels, and a medium rubber barrel positioned between the two side rubber barrels; two ends of the medium rubber barrels are respectively separated and in close contact with the side rubber barrels through a spacer ring; multi-layer circular spiral spring rings are respectively arranged at the shoulder parts of the two side rubber barrels and used for being radially expanded along the rubber barrel body to protect the shoulder parts of the side rubber barrels when an opposite axial extruding force is applied to the rubber barrel body. According to the compressed packer rubber barrel with the spacer ring combined spring shoulder pad, the multi-layer spiral springs can effectively protect the shoulder parts of the rubber barrel body; when in setting packing, the multi-layer spiral spring is expanded to block an a ring space to prevent the rubber barrels from being extruded; the multi-layer spiral spring is retracted under the tension force of the spring when releasing the packing and recovering; therefore, the problem of difficult retracting of the general rubber barrels can be avoided; in case that one section is failed in sealing when the rubber barrel body works, the other two sections can perform effective sealing; the compressed packer rubber barrel is high in bearing capacity and deformation resistance, and cam meet the requirements on high temperature, high pressure, and releasing and recovering.
Description
Technical field
The present invention relates to the downhole tool technical field of petroleum-gas fiedl pressing crack construction, specifically a kind of band spacer ring complex spring shoulder protector compression type packer tubling.
Background technology
Compression packer is the important underground operation tool of the operations such as petroleum-gas fiedl reservoir reconstruction, production, and packing element is the core component of packer, and the performance of packing element directly has influence on the performance of packer.Operationally, its packing element can be squeezed and expand compression packer, the extrusion stress that its inner existence is very large.Upper and lower shoulder (being called shoulder with glue tube base contact portion) due to packing element is squeezed the stress that can produce and clamp-on to annular space, when this stress is greater than the anti-shearing force of packing element rubber, packing element can be torn, and especially more easily damages in the environment of high temperature, high pressure.So the upper and lower shoulder of packing element is the vulnerable point of packing element.Current packing element shoulder safeguard measure is mainly designed with plastics, metal Hu Sandeng mechanism at packing element two ends, but these mechanisms are mostly " disposable " or " permanent type ", do not meet packer can deblocking reclaim demand.
For this reason, for the demand of current underground construction and fracturing technology, exploitation one is needed to meet high temperature, high pressure, the high-performance packing element of Recyclable packer.
Summary of the invention
The object of the invention is to overcome current compression type packer tubling can not meet high temperature, high pressure, can the problem of demand that reclaims of deblocking, a kind of compression type packer tubling with packing element body structure and special packing element shoulder operator guards is provided.
For this reason, the invention provides a kind of band spacer ring complex spring shoulder protector compression type packer tubling, its technical scheme is: a kind of band spacer ring complex spring shoulder protector compression type packer tubling, comprise packing element body, described packing element body comprises two limit packing elements and a middle packing element, described middle packing element is between two limit packing elements, and the two ends of middle packing element are separated by with spacer ring respectively and between the packing element of limit, limit packing element and middle packing element respectively with spacer ring close contact; The shoulder place of described two limit packing elements is respectively arranged with the multi-layer helical spring annulus when packing element body is subject to axial compression power in opposite directions along the shoulder for the protection of limit packing element of packing element body radial dilatation.
Above-mentioned multi-layer helical spring annulus comprises external spiral spring annulus and is sheathed on the inside spin spring annulus in external spiral spring annulus.
Above-mentioned inside spin spring annulus) quantity be at least 1.
Above-mentioned multi-layer helical spring annulus is embedded on the shoulder of described limit packing element.
Above-mentioned multi-layer helical spring annulus and limit packing element sulfuration are integrated.
The center of circle of above-mentioned multi-layer helical spring annulus is positioned on the central axis of described packing element body, and the external diameter of described multi-layer helical spring annulus is equal with the external diameter of limit packing element; Described multi-layer helical spring annulus radial parallel in the radial direction of described packing element body; The cross section radius of circle of described multi-layer helical spring annulus is greater than the annular clearance distance between packing element body and internal surface of sleeve pipe.
Above-mentioned limit packing element is made up of elastomeric material, and its hardness is your the A95 degree that continues.
Above-mentioned middle packing element is made up of elastomeric material, and its hardness is your the A85 degree that continues.
Beneficial effect of the present invention: the shoulder of this packing element provided by the invention adopts special callable operator guards: namely respectively inlay a multi-layer helical spring annulus at the upper and lower shoulder of packing element, and sulfide with packing element, this annulus can expand with packing element, shrink; When setting, multi-layer helical spring spreading blocks annular space, prevents extruding of packing element, and when deblocking reclaims, multi-layer helical spring bounces back under spring tension effect, avoids the problem of conventional packing element retraction difficulty.This packing element adopts three packing element band spacer ring combining forms, limit, two ends packing element act as crams annular space and part sealing function, and can prevent from middle packing element from extruding from annular clearance being damaged, middle packing element plays the effect of main seal, during work, even if single hop seal failure, all the other two sections also can be played sealing function effectively.The present invention has higher pressure-bearing and non-deformability, can meet high temperature, high pressure, the callable demand of deblocking.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is multi-layer helical spring annulus schematic diagram;
Fig. 2 is the multi-layer helical spring ring cross-section schematic diagram with the inner sheathed inside spin spring circular ring structure of external spiral spring annulus;
Fig. 3 is structural representation of the present invention;
Fig. 4 is the schematic diagram of the present invention when being in packing state;
Fig. 5 is the shoulder partial enlarged drawing of the present invention when being in packing state;
Fig. 6 is the schematic diagram of the present invention when being in unset state.
Description of reference numerals:
1, external spiral spring annulus; 2, inside spin spring annulus; 3, limit packing element; 4, middle packing element; 5, spacer ring; 6, upper glue tube base; 7, sleeve pipe; 8, central tube; 9, lower rubber cylinder seat; 10, pad.
Detailed description of the invention
Embodiment 1:
One band spacer ring complex spring shoulder protector compression type packer tubling as shown in Figure 3, comprise packing element body, described packing element body is three packing element fabricated structures, comprise two limit packing elements 3 and a middle packing element 4, described middle packing element 4 is between two limit packing elements 3, and the two ends of middle packing element 4 are separated by with spacer ring 5 respectively and between limit packing element 3, limit packing element 3 and middle packing element 4 respectively with spacer ring 5 close contact; The structure of this packing element body is three packing element band spacer ring fabricated structures, and its packing element structure is syllogic hermetically-sealed construction, and during work, even if single hop seal failure, all the other two sections also can be played sealing function effectively.The shoulder place of described two limit packing elements 3 is respectively arranged with the multi-layer helical spring annulus when packing element body is subject to axial compression power in opposite directions along the shoulder for the protection of limit packing element 3 of packing element body radial dilatation.The shoulder of this packing element provided by the invention adopts special callable operator guards: namely respectively inlay a multi-layer helical spring annulus at the upper and lower shoulder of packing element, and sulfide with packing element, this annulus can expand with packing element, shrink; When setting, multi-layer helical spring spreading blocks annular space, prevents extruding of packing element, and when deblocking reclaims, multi-layer helical spring bounces back under spring tension effect, avoids the problem of conventional packing element retraction difficulty.This packing element adopts three packing element band spacer ring combining forms, limit, two ends packing element act as crams annular space and part sealing function, and can prevent from middle packing element from extruding from annular clearance being damaged, middle packing element plays the effect of main seal, during work, even if single hop seal failure, all the other two sections also can be played sealing function effectively.
Embodiment 2:
On the basis of embodiment 1, described multi-layer helical spring annulus comprises external spiral spring annulus 1 and is sheathed on the inside spin spring annulus 2 in external spiral spring annulus 1, as shown in Figure 1 and Figure 2, it is configured to little cylindrically coiled spring and is positioned in large helical spring, respectively by inside and outside helical spring head, tail two ends through special process welding formed annulus (pad 10 as shown in fig. 1), this annulus can radial dilatation, contraction; The quantity of the inside spin spring annulus 2 in the present embodiment is at least 1.The shoulder that described multi-layer helical spring annulus is embedded in described limit packing element 3 is integrated with limit packing element 3 sulfuration, and rubber osmosis is in the inside of spring, spring plays the effect strengthening rubbery intensity, as shown in Figure 3.Multi-layer helical spring annulus can expand with the expansion of packing element, and operationally bears differential pressure action, reaches the effect preventing packing element from extruding; The center of circle of multi-layer helical spring annulus is positioned on the central axis of described packing element body, and the external diameter of described multi-layer helical spring annulus is equal with the external diameter of limit packing element 3; Multi-layer helical spring annulus radial parallel in the radial direction of described packing element body; The cross section radius of circle of multi-layer helical spring annulus is greater than the annular clearance distance between packing element body and sleeve pipe 7 inwall.Limit packing element 3 elastomeric material hardness is your the A95 degree that continues in the present embodiment; Middle packing element 4 is gum structure, and in the present embodiment, its elastomeric material hardness is your the A85 degree that continues.The present invention has higher pressure-bearing and non-deformability, can meet high temperature, high pressure, the callable demand of deblocking, reaches the requirement of formation testing gas job safety green technology, economical and effective.
Below in conjunction with compression packer operating principle, present embodiment is set forth.The core texture of compression packer comprises the limit packing element 3 of central tube 8, upper glue tube base 6, lower rubber cylinder seat 9 and end, middle middle packing element 4, as shown in Figure 3, Figure 4.During packer setting, upper and lower glue tube base 6,9 stressed squish lip packing element 3 and middle packing element 4, expanding after packing element body is squeezed causes limit packing element 3 and middle packing element 4 external surface to be close to the inwall of sleeve pipe 7, limit packing element 3 and middle packing element 4 inner surface are close to the external surface of packer central tube 8, and packer realizes setting.
Shoulder protection mechanism below in conjunction with packing element body is set forth: packer is when setting, the extrusion stress that inner existence is larger is caused because packing element is squeezed, the inside and outside surface of packing element body does not have the central tube outer wall of packer and internal surface of sleeve pipe to support, and can balance the extrusion stress of packing element inside; The area on the upper and lower surface of packing element has the upper and lower glue tube base of packer to support, and can balance the extrusion stress of packing element inside, as shown in Figure 5.But, be the annular space of packer rubber cylinder base and internal surface of sleeve pipe outside the upper and lower shoulder of packer, there is no outside supporting surface to balance the extrusion stress of packing element inside.Now, the upper and lower shoulder of packing element body of the present invention is double-layer spiral spring circular ring structure, and this helical spring annulus is expanded with the expanded radially of packing element.Last helical spring annulus is close to internal surface of sleeve pipe by the extruding of glue tube base with packing element radial dilatation.The gap of footpath much larger than packer rubber cylinder base and internal surface of sleeve pipe annular space is cut due to helical spring annulus, helical spring annulus can not continue to expand to the annular space of packer and sleeve pipe, and now helical spring annulus is as the supporting surface balance extrusion stress of packing element inside of packing element shoulder and annulus fluid high pressure.
When removing seal for packer, the extruding force of upper and lower glue tube base to packing element of packer is cancelled, packing element retracted for clearance, the helical spring annulus of the upper and lower shoulder of packing element with the rubber retracted for clearance of packing element, as shown in Figure 6.When again setting, helical spring annulus is with packing element rubber swelling radial dilatation.This helical spring annulus can protect packing element again.
The part do not described in detail in present embodiment belongs to the known conventional means of the industry, does not describe one by one here.More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (8)
1. a band spacer ring complex spring shoulder protector compression type packer tubling, comprise packing element body, it is characterized in that: described packing element body comprises two limit packing elements (3) and a middle packing element (4), described middle packing element (4) is positioned between two limit packing elements (3), and the two ends of middle packing element (4) are separated by with spacer ring (5) respectively and between limit packing element (3), limit packing element (3) and middle packing element (4) respectively with spacer ring (5) close contact; The shoulder place of described two limit packing elements (3) is respectively arranged with the multi-layer helical spring annulus when packing element body is subject to axial compression power in opposite directions along the shoulder for the protection of limit packing element (3) of packing element body radial dilatation.
2. a kind of band spacer ring complex spring shoulder protector compression type packer tubling as claimed in claim 1, is characterized in that: described multi-layer helical spring annulus comprises external spiral spring annulus (1) and is sheathed on the inside spin spring annulus (2) in external spiral spring annulus (1).
3. a kind of band spacer ring complex spring shoulder protector compression type packer tubling as claimed in claim 2, is characterized in that: the quantity of described inside spin spring annulus (2) is at least 1.
4. a kind of band spacer ring complex spring shoulder protector compression type packer tubling as claimed in claim 1, is characterized in that: described multi-layer helical spring annulus is embedded on the shoulder on described limit packing element (3).
5. a kind of band spacer ring complex spring shoulder protector compression type packer tubling as claimed in claim 4, is characterized in that: described multi-layer helical spring annulus and limit packing element (3) sulfuration are integrated.
6. a kind of band spacer ring complex spring shoulder protector compression type packer tubling as claimed in claim 1, it is characterized in that: the center of circle of described multi-layer helical spring annulus is positioned on the central axis of described packing element body, and the external diameter of described multi-layer helical spring annulus is equal with the external diameter of limit packing element (3);
Described multi-layer helical spring annulus radial parallel in the radial direction of described packing element body;
The cross section radius of circle of described multi-layer helical spring annulus is greater than the annular clearance distance between packing element body and sleeve pipe (7) inwall.
7. the one band spacer ring complex spring shoulder protector compression type packer tubling as described in claim 1 or 2 or 3 or 4 or 5 or 6, is characterized in that: described limit packing element (3) is made up of elastomeric material, and its hardness is your the A95 degree that continues.
8. the one band spacer ring complex spring shoulder protector compression type packer tubling as described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7, is characterized in that: described middle packing element (4) is made up of elastomeric material, and its hardness is your the A85 degree that continues.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410688087.6A CN104389546A (en) | 2014-11-26 | 2014-11-26 | Compressed packer rubber barrel with spacer ring combined spring shoulder pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410688087.6A CN104389546A (en) | 2014-11-26 | 2014-11-26 | Compressed packer rubber barrel with spacer ring combined spring shoulder pad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104389546A true CN104389546A (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410688087.6A Pending CN104389546A (en) | 2014-11-26 | 2014-11-26 | Compressed packer rubber barrel with spacer ring combined spring shoulder pad |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104389546A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912513A (en) * | 2015-05-25 | 2015-09-16 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Spring type shoulder protector high-temperature and high-pressure expansion type packer rubber tube |
| CN106246134A (en) * | 2016-08-30 | 2016-12-21 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of High Temperature High Pressure retrievable formation testing packer |
| WO2017198121A1 (en) * | 2016-05-20 | 2017-11-23 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder having higher stiffness in upper end portion, packer, and bridge plug |
| CN107701142A (en) * | 2017-10-21 | 2018-02-16 | 中国石油集团渤海钻探工程有限公司 | A kind of testing pressure of well head rotary sealing type casing blanking plug |
| CN109681146A (en) * | 2018-04-16 | 2019-04-26 | 中国石油化工股份有限公司 | Double medium multistage amplificate packers and card encapsulation method |
| WO2022119576A1 (en) * | 2020-12-04 | 2022-06-09 | Halliburton Energy Services, Inc. | Radially expandable anti-extrusion backup ring |
| CN116446820A (en) * | 2023-04-27 | 2023-07-18 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
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| CN204283310U (en) * | 2014-11-26 | 2015-04-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of band spacer ring complex spring shoulder protector compression type packer tubling |
-
2014
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060047028A1 (en) * | 2004-02-02 | 2006-03-02 | Yanmei Li | Hydrogel for use in downhole seal applications |
| US20070163777A1 (en) * | 2006-01-18 | 2007-07-19 | Murray Douglas J | Self energized packer |
| CN201057016Y (en) * | 2007-06-26 | 2008-05-07 | 大港油田集团有限责任公司 | Hydraulic self-sealing slip packer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912513A (en) * | 2015-05-25 | 2015-09-16 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Spring type shoulder protector high-temperature and high-pressure expansion type packer rubber tube |
| WO2017198121A1 (en) * | 2016-05-20 | 2017-11-23 | 天鼎联创密封技术（北京）有限公司 | Rubber cylinder having higher stiffness in upper end portion, packer, and bridge plug |
| CN106246134A (en) * | 2016-08-30 | 2016-12-21 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of High Temperature High Pressure retrievable formation testing packer |
| CN107701142A (en) * | 2017-10-21 | 2018-02-16 | 中国石油集团渤海钻探工程有限公司 | A kind of testing pressure of well head rotary sealing type casing blanking plug |
| CN109681146A (en) * | 2018-04-16 | 2019-04-26 | 中国石油化工股份有限公司 | Double medium multistage amplificate packers and card encapsulation method |
| WO2022119576A1 (en) * | 2020-12-04 | 2022-06-09 | Halliburton Energy Services, Inc. | Radially expandable anti-extrusion backup ring |
| GB2614006A (en) * | 2020-12-04 | 2023-06-21 | Halliburton Energy Services Inc | Radially expandable anti-extrusion backup ring |
| US11732545B2 (en) | 2020-12-04 | 2023-08-22 | Halliburton Energy Services, Inc. | Radially expandable anti-extrusion backup ring |
| CN116446820A (en) * | 2023-04-27 | 2023-07-18 | 盐城市弘通石油机械有限公司 | Tail pipe top packer |
| 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 |
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Application publication date: 20150304 |
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