CN101210485B - Design method of expansion sleeve for oil field - Google Patents
Design method of expansion sleeve for oil field Download PDFInfo
- Publication number
- CN101210485B CN101210485B CN2006101052564A CN200610105256A CN101210485B CN 101210485 B CN101210485 B CN 101210485B CN 2006101052564 A CN2006101052564 A CN 2006101052564A CN 200610105256 A CN200610105256 A CN 200610105256A CN 101210485 B CN101210485 B CN 101210485B
- Authority
- CN
- China
- Prior art keywords
- expansion
- plug
- cone
- sleeve
- oil
- Prior art date
Links
- 239000003921 oils Substances 0.000 title claims description 10
- 230000001808 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reactions Methods 0.000 claims description 17
- 239000007787 solids Substances 0.000 claims description 6
- 238000000034 methods Methods 0.000 abstract description 9
- 238000005500 petroleum industry Methods 0.000 abstract description 2
- 230000003139 buffering Effects 0.000 abstract 3
- 238000005553 drilling Methods 0.000 description 10
- 239000003129 oil well Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 208000002925 Dental Caries Diseases 0.000 description 2
- 238000005516 engineering processes Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Abstract
Description
Technical field
The present invention relates to the design of string pipe method used in the operation of petroleum industry expansion sleeve, particularly a kind of method for designing with expansion sleeve of buffer capacity.
Background technology
The field use expansion sleeve is used for repairing the sleeve pipe that is corroded in the oil well, to keep the integrality of oil well casing, keeps normal oil well production, prolongs the life-span of oil well; Also can be used for drillng operation, solve some challenges that occur in the drilling process, as when boring the chance salt deposit or being prone to collapse the stratum, available expansion sleeve operation pipe keeps the integrality of well, guarantees proceeding of drillng operation; Maybe need be lowered in the drillng operation of multilayer sleeve at deep-well and ultradeep well drilling well, use the expansion sleeve technology can obtain bigger intact and internal diameter, convenient follow-up operation.Existing through the expansion sleeve embodiment be an expansion tube is transferred to preposition after, turn on pump is suppressed expansion, under the effect of pressure, the expansion body moves down.Second process is expansion positioning, and when the expansion body was inflated the anchor position packing element, the expansion body was anchored on the sleeve pipe.When the expansion body is anchored on the sleeve pipe; Along with pump is constantly suppressed, expansion cone begins to go up the top, because expansion cone is hard the connection with drilling tool; The weight of drilling tool will all be added on the expansion cone; Additonal pressure sharply increases when causing expansion, and these additonal pressures can cause and start chamber plug seal failure, and the expansion operation is given up halfway.And maintenance is inconvenient.
Summary of the invention
The object of the present invention is to provide a kind of method for designing of expansion sleeve for oil field,, improve the reliability in the expansion sleeve operation process, and it is easy to maintenance so that reduce the risk of expansion operation process.
Technical scheme of the present invention is that a kind of method for designing of expansion sleeve for oil field is characterized in that: it is provided with buffer gear on expansion sleeve, to reduce impact force and the pressure on the expansion sleeve; Buffer gear is an expansion coupling.
Described expansion sleeve comprises expansion body 2, expansion cone 10, plug 11, tubing string 1 at least, and the lower end of expansion body 2 is connected with plug 11; In plug 11 upper ends, expansion body 2 is reserved cone segments has expansion cone 10; There is tubing string 1 upper end of expansion body 2, between tubing string 1 and expansion cone 10, is connected with expansion coupling.
Described expansion coupling comprises retracting cylinder 3, expansion link 6, expansion link joint 8 at least; Expansion link joint 8 one ends are connected with expansion cone 10; Expansion link joint 8 other ends are connected with expansion link 6; Expansion link 6 other ends are slidingly connected at the inner tube wall of retracting cylinder 3, and the length of expansion link 6 is chosen in 60-160cm.
The length of said expansion link 6 is at 120cm.
The cross section of inboard wall of described retracting cylinder 3 is just hexagonal or positive squares, or round.
One end of described plug 11 is that the cavity body other end is a solid, and the internal diameter of plug one end cavity matches with the outside dimension of demounting tool 12 connectors, and the outside of plug 11 other end solids has screw thread to be connected with the threaded one end of expansion body 2.
The course of work of the present invention and characteristics are: the method for designing of this expansion sleeve for oil field, and it is provided with buffer gear on expansion sleeve, to reduce impact force and the pressure on the expansion sleeve; Buffer gear can be an expansion coupling, in the expansion sleeve operation of oil field, uses expansion coupling, and expansion link joint 8 one ends are threaded with expansion cone connecting thread 9; Expansion link joint 8 other ends are threaded with the expansion link connecting thread 7 of expansion link 6; The inner tube wall of expansion link 6 other ends and retracting cylinder 3 is slidingly connected.When moving on the expansion cone 10, expansion coupling shrinks during work, and this just is equivalent to expansion coupling the weight and the expansion cone 10 of drilling tool isolated, and the weight of drilling tool can not be added on the expansion cone 10.After expansion coupling all harvested, pump pressure rose, on carry drilling tool.So circulation can be accomplished the expansion operation smoothly.Lower impact force and pressure, increased the reliability of grappling, the risk of favourable reduction expansion operation process improves the reliability in the expansion sleeve operation process, and its expansion process is steady.Because expansion link 6 length dimensions are long, processing cost is too high, and the little role of undersized adjustable range is little, so expansion link 6 length ranges are chosen in 60-160cm, optimum length is 120cm, and adjustable range is big like this, and cost is low.The plug of the present invention's design is realized the shutoff to expansion body 2 through the connection of screw thread; Demounting tool and plug are connected during dismounting, realize that the fast quick-detach of plug is convenient to maintenance.
Description of drawings
Below in conjunction with the embodiment accompanying drawing the present invention is described further.
Fig. 1 is the example structure sketch map;
Cross sectional representation when Fig. 2 is the use of embodiment plug.
Among the figure: 1, tubing string; 2, expansion body; 3, retracting cylinder; 4, grappling packing element; 5, sealing ring; 6, expansion link; 7, connecting thread; 8, expansion link joint; 9, expansion cone connecting thread; 10, expansion cone; 11, plug; 12, demounting tool.
The specific embodiment
As shown in Figure 1, the lower end of expansion body 2 is connected with plug 11; Expansion body 2 and plug 11 and the bobbin seal that is corroded, there is tubing string 1 upper end of expansion body 2, between tubing string 1 and expansion cone 10, is connected with expansion coupling.Expansion coupling mainly contains retracting cylinder 3, expansion link 6, expansion link joint 8; Expansion link joint 8 one ends are connected with expansion cone 10; Expansion link joint 8 other ends are connected with expansion link 6; Expansion link 6 other ends slide at the inner tube wall of retracting cylinder 3, and the length of expansion link 6 is chosen in 60-160cm, and optimum length is 120cm.Expansion cone 10 at first is fixed on expansion body 2 and reserves cone segments.There is expansion cone connecting thread 9 expansion cone 10 upper ends, and expansion link joint 8 one ends are also threaded, and expansion cone 10 connecting threads 9 are threaded with expansion link joint 8 one ends; Expansion link joint 8 other ends are threaded with the connecting thread 7 of expansion link 6.During work, when expansion body 2 is anchored to grappling packing element 4, along with pump is constantly suppressed, move on the expansion cone 10, expansion coupling shrinks, and this just is equivalent to expansion coupling the weight and the expansion cone of drilling tool isolated, and the weight of drilling tool can not be added on the expansion cone 10.After expansion coupling all harvests, on carry drilling tool.So circulation can be accomplished the expansion operation smoothly.Expansion coupling should be capable of expansion and contraction, and sealing, so retracting cylinder 3 interfaces again has sealing ring 5, and the expansion link 6 and the interface of retracting cylinder 3 are effectively sealed.
Cross sectional representation when Fig. 2 is the use of embodiment plug, as shown in Figure 2, this plug 11 1 ends are that the cavity body other end is a solid, the internal diameter of plug 11 1 end cavitys matches with the outside dimension of demounting tool 12 connectors.The outside of plug 11 other end solids has screw thread to be connected with the threaded one end of expansion body 2.
The shape of cross section of plug 11 1 end cavitys can be regular hexagon, or cross or wherein a kind of of square, and selecting any is basis and corresponding the getting final product of demounting tool 12 connector shape sizes.The outside screw thread of plug 11 other ends is connected with the threaded one end of expansion body 2 when using, and plug 11 is realized the shutoff to expansion body 2 through the connection of screw thread; Demounting tool 12 is connected with plug 11 during repair demolition, realizes the dismounting of plug 11.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101052564A CN101210485B (en) | 2006-12-25 | 2006-12-25 | Design method of expansion sleeve for oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101052564A CN101210485B (en) | 2006-12-25 | 2006-12-25 | Design method of expansion sleeve for oil field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101210485A CN101210485A (en) | 2008-07-02 |
| CN101210485B true CN101210485B (en) | 2012-06-06 |
Family
ID=39610729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101052564A CN101210485B (en) | 2006-12-25 | 2006-12-25 | Design method of expansion sleeve for oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101210485B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011023743A2 (en) | 2009-08-28 | 2011-03-03 | Shell Internationale Research Maatschappij B.V. | System and method for anchoring an expandable tubular to a borehole wall |
| CA2770458A1 (en) | 2009-08-28 | 2011-03-03 | Shell Internationale Research Maatschappij B.V. | System and method for anchoring an expandable tubular to a borehole wall |
| BR112012004486A2 (en) | 2009-08-28 | 2016-03-22 | Shell Int Research | system for anchoring an expandable tubular to a well wall |
| CN101812980B (en) * | 2010-02-03 | 2013-06-26 | 华鼎鸿基石油工程技术(北京)有限公司 | Expansion tube assembly, oil well subsidy construction mechanism and construction method |
| CN103696718A (en) * | 2013-12-19 | 2014-04-02 | 中国石油天然气股份有限公司 | Method and device for repairing double-clamping-sleeve of expansion pipe of long section of casing damage well in layered partition manner |
| CN103835674B (en) * | 2014-03-04 | 2016-03-02 | 岳维建 | Oil field fast and safely solid expansion pipe bracing means |
-
2006
- 2006-12-25 CN CN2006101052564A patent/CN101210485B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CN101210485A (en) | 2008-07-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| C06 | Publication | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090109 Address after: Shaanxi province Xi'an Weiyang Weiyang Road No. 151 in Changqing Garden District Changqing headquarters and the Ministry of science and Engineering Applicant after: Chuanqing Drilling Engineering Co., Ltd. of China National Petroleum Corporation Address before: Science and Technology Bureau of Exploration Bureau of Changqing prosperous garden district, Xi'an, Shaanxi Applicant before: Changqing Petroleum Prospection Bureau |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM GROUP CHUANQING DRILLING ENGINEERI Free format text: FORMER OWNER: CHANGQING PETROLEUM EXPLORATION BUREAU Effective date: 20090109 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20161225 |