CN101210485B - Design method of expansion sleeve for oil field - Google Patents

Design method of expansion sleeve for oil field Download PDF

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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
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CN
China
Prior art keywords
expansion
plug
cone
sleeve
oil
Prior art date
Application number
CN2006101052564A
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Chinese (zh)
Other versions
CN101210485A (en
Inventor
王长宁
李前春
魏小房
王莉
杨博
Original Assignee
中国石油集团川庆钻探工程有限公司
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Priority to CN2006101052564A priority Critical patent/CN101210485B/en
Publication of CN101210485A publication Critical patent/CN101210485A/en
Application granted granted Critical
Publication of CN101210485B publication Critical patent/CN101210485B/en

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Abstract

The invention relates to a method of designing a pipe column used in the operation of an expansion casing in the petroleum industry, in particular to a method of designing an expansion casing with buffering capacity. The invention is characterized in that: a buffering mechanism is arranged on the expansion casing to reduce impact and pressure on the expansion casing, and the buffering mechanism is a slip joint. The expansion casing is at least provided with an expansion pipe (2), an expansion cone (10) and a pipe column (1); wherein the lower end of the expansion pipe (2) is connected with a plug (11), the expansion cone is arranged on a preformed pyramidal section of the expansion pipe (2); the upper end of the expansion pipe (2) is connected with the pipe column (1), and the slip joint is arranged between the pipe column (1) and the expansion cone (10). The invention reduces the risk in the process of expansion operation, improves the reliability in the process of the operation of the expansion casing, and is convenient for maintenance.

Description

A kind of method for designing of expansion sleeve for oil field

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)

1. expansion sleeve for oil field, it 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 end, 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 end is connected with expansion link (6); Expansion link (6) other end is slidingly connected at the inner tube wall of retracting cylinder (3), and the length of expansion link (6) is chosen in 60-160cm.
2. a kind of expansion sleeve for oil field according to claim 1 is characterized in that: the length of said expansion link (6) is at 120cm.
3. a kind of expansion sleeve for oil field according to claim 1 is characterized in that: the inner chamber cross section of described retracting cylinder (3) is just hexagonal or positive square, or round.
4. a kind of expansion sleeve for oil field according to claim 1; It is characterized in that: an end of described plug (11) is that the cavity body other end is a solid; The internal diameter of plug one end cavity matches with the outside dimension of demounting tool (12) connector, and the outside of plug (11) other end solid has screw thread to be connected with the threaded one end of expansion body (2).
CN2006101052564A 2006-12-25 2006-12-25 Design method of expansion sleeve for oil field CN101210485B (en)

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

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
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

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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

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