CN201428386Y - Expansion string for casing damaged well - Google Patents
Expansion string for casing damaged well Download PDFInfo
- Publication number
- CN201428386Y CN201428386Y CN2009200200110U CN200920020011U CN201428386Y CN 201428386 Y CN201428386 Y CN 201428386Y CN 2009200200110 U CN2009200200110 U CN 2009200200110U CN 200920020011 U CN200920020011 U CN 200920020011U CN 201428386 Y CN201428386 Y CN 201428386Y
- Authority
- CN
- China
- Prior art keywords
- expansion
- tube
- tubing string
- tube connector
- damaged well
- 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.)
- Expired - Fee Related
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- Earth Drilling (AREA)
Abstract
The utility model relates to an expansion string for a casing damaged well, which consists of an upper connecting pipe and a lower connecting pipe. A plurality of middle expansion pipes are arranged between the upper connecting pipe and the lower connecting pipe. Two adjacent expansion pipes are connected together through tapered threads. A protective sleeve is arranged at the joint of two adjacent expansion pipes. Since protective sleeves are arranged at the joints among the expansion pipes, the joints are not apt to separate from each other during and after the expansion of the expansion string, the connection of the joints among the expansion pipes is firm, the structural integrity of the joints among the expansion pipes is kept and thereby the tightness of the joints among the expansion pipes is high. Moreover, since retaining rings and O-rings are arranged at the joints among the expansion pipes, the tightness of the joints after the expansion of the expansion string is further guaranteed.
Description
Technical field
The utility model relates to a kind of OCTG, relates to a kind of employed expansion tubing string when in the oil exploitation process drilling well being repaired specifically.
Background technology
Bulged tube technology is a new technology in petroleum works field, expansion tube is a kind ofly to be made by special material, metal steel pipe with good plasticity, this technology is to make the expansion tube that is lowered in the oil gas well well produce expanded radially by methods such as machinery or hydraulic pressure, expansion tube is close on the outer field borehole wall or the sleeve pipe, thereby reach the breakage of casing damaged well is repaired, the purpose that reduces production costs, expansion tube is after expansion, under the cold effect of doing sclerosis, the intensity and the rigidity of expansion tube are improved, make expansion tube have the favorable mechanical performance, this kind recovery technique has the repair place of repairing the back casing damaged well can obtain bigger latus rectum, good airproof performance, advantages such as anti-inside and outside pressure energy power is strong and being widely used, when needs are lowered to the expansion tube length of well when bigger, need a plurality of independent expansion tubes are connected in the expansion tubing string lower going-into-well, and then whole expansion tubing string expanded, this junction that just needs the expansion tubing string also is radially expandable, promptly require the connector of expansion tubing string in expansion process and after expanding, not to be damaged, guarantee sealing load simultaneously, at present, the expansion tubing string exists the junction between each expansion tube to separate easily after the expansion, influenced the integrality of structure, the sealing performance of expansion tubing string after expansion descended and can't satisfy instructions for use.
The utility model content
Problem to be solved in the utility model is at above problem, provides that junction between a kind of each expansion tube is connected firmly after expansion, the casing damaged well expansion tubing string of good airproof performance.
For addressing the above problem; the technical scheme that the utility model adopted is: casing damaged well expansion tubing string; comprise tube connector and following tube connector; described going up between tube connector and the following tube connector is provided with some intermediate expansion pipes; connect by tapered thread between described two adjacent expansion tubes, the junction of described adjacent two expansion tubes is provided with protective sleeve.
A kind of concrete prioritization scheme, the junction of described adjacent two expansion tubes are provided with back-up ring and O RunddichtringO.
A kind of concrete prioritization scheme, the described tube connector lower end of going up is provided with conical internal thread.
A kind of concrete prioritization scheme, described tube connector down upper end is provided with conical external screw thread, and described tube connector lower end down is provided with internal thread.
A kind of concrete prioritization scheme, described intermediate expansion pipe comprises internal thread expansion tube and external screw thread expansion tube.
A kind of concrete prioritization scheme, described external screw thread expansion tube two ends are respectively arranged with conical external screw thread.
A kind of concrete prioritization scheme, described internal thread expansion tube two ends are respectively arranged with conical internal thread.
The utility model is taked above technical scheme; have the following advantages: because the junction between each expansion tube is provided with protective sleeve; so; in the expansion process of expansion tubing string with expand after the junction be difficult for separating; junction between each expansion tube is connected firmly; the structural integrity that has kept junction between each expansion tube; thereby make the junction between each expansion tube have higher sealing; again because the junction between each expansion tube is provided with back-up ring and O RunddichtringO; so, further guaranteed the sealing of expansion tubing string junction after expansion.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Accompanying drawing is the structural representation that casing damaged well is used the expansion tubing string among the utility model embodiment.
Among the figure: the last tube connector of 1-; The 2-back-up ring; The 3-O RunddichtringO; The 4-protective sleeve; 5-external screw thread expansion tube; 6-internal thread expansion tube; Tube connector under the 7-.
The specific embodiment
Embodiment: as shown in drawings; casing damaged well expansion tubing string; comprise tube connector 1 and following tube connector 7; last tube connector 1 and following tube connector 7 are provided with the intermediate expansion pipe; the intermediate expansion pipe comprises external screw thread expansion tube 5 and internal thread expansion tube 6; last tube connector 1 lower end is provided with conical internal thread; last tube connector 1 upper end is provided with external screw thread; following tube connector 7 upper ends are provided with conical external screw thread; following tube connector 7 lower ends are provided with internal thread; external screw thread expansion tube 5 two ends are respectively arranged with conical external screw thread; internal thread expansion tube 6 two ends are respectively arranged with conical internal thread; last tube connector 1 lower end is connected by tapered thread with external screw thread expansion tube 5 upper ends; external screw thread expansion tube 5 lower ends are connected by tapered thread with internal thread expansion tube 6 upper ends; internal thread expansion tube 6 lower ends are connected by tapered thread with following tube connector 7 upper ends; the junction of last tube connector 1 lower end and external screw thread expansion tube 5 upper ends; internal thread expansion tube 6 lower ends are respectively arranged with protective sleeve 4 with the junction of following tube connector 7 upper ends and the junction of external screw thread expansion tube 5 lower ends and internal thread expansion tube 6 upper ends; back-up ring 2 and O RunddichtringO 3, protective sleeve 4 is positioned on the excircle of each junction.
Can repair the length of casing damaged well sleeve pipe as required, increase or reduce the quantity of external screw thread expansion tube 5 and internal thread expansion tube 6, damage the needs that sleeve pipe is repaired thereby satisfy different length.
Claims (7)
1, casing damaged well expansion tubing string; comprise tube connector (1) and following tube connector (7); described going up between tube connector (1) and the following tube connector (7) is provided with some intermediate expansion pipes; it is characterized in that: connect by tapered thread between described two adjacent expansion tubes, the junction of described adjacent two expansion tubes is provided with protective sleeve (4).
2, casing damaged well as claimed in claim 1 expansion tubing string is characterized in that: the junction of described adjacent two expansion tubes is provided with back-up ring (2) and o RunddichtringO (3).
3, casing damaged well as claimed in claim 1 expansion tubing string is characterized in that: described tube connector (1) lower end of going up is provided with conical internal thread.
4, casing damaged well as claimed in claim 1 expansion tubing string is characterized in that: described tube connector (7) down upper end is provided with conical external screw thread, and described tube connector (7) lower end down is provided with internal thread.
5, casing damaged well as claimed in claim 1 expansion tubing string is characterized in that: described intermediate expansion pipe comprises internal thread expansion tube (6) and external screw thread expansion tube (5).
6, casing damaged well as claimed in claim 5 expansion tubing string is characterized in that: described external screw thread expansion tube (5) two ends are respectively arranged with conical external screw thread.
7, casing damaged well as claimed in claim 5 expansion tubing string is characterized in that: described internal thread expansion tube (6) two ends are respectively arranged with conical internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200200110U CN201428386Y (en) | 2009-03-31 | 2009-03-31 | Expansion string for casing damaged well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200200110U CN201428386Y (en) | 2009-03-31 | 2009-03-31 | Expansion string for casing damaged well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201428386Y true CN201428386Y (en) | 2010-03-24 |
Family
ID=42032120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200200110U Expired - Fee Related CN201428386Y (en) | 2009-03-31 | 2009-03-31 | Expansion string for casing damaged well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201428386Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003208A (en) * | 2015-08-19 | 2015-10-28 | 华鼎鸿基石油工程技术(北京)有限公司 | Sleeve tie-back device |
-
2009
- 2009-03-31 CN CN2009200200110U patent/CN201428386Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003208A (en) * | 2015-08-19 | 2015-10-28 | 华鼎鸿基石油工程技术(北京)有限公司 | Sleeve tie-back device |
| CN105003208B (en) * | 2015-08-19 | 2017-11-24 | 华鼎鸿基石油工程技术(北京)有限公司 | A kind of sleeve connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100324 Termination date: 20110331 |