CN2766031Y - Sleeve plug for blocking junk - Google Patents
Sleeve plug for blocking junk Download PDFInfo
- Publication number
- CN2766031Y CN2766031Y CN 200520025115 CN200520025115U CN2766031Y CN 2766031 Y CN2766031 Y CN 2766031Y CN 200520025115 CN200520025115 CN 200520025115 CN 200520025115 U CN200520025115 U CN 200520025115U CN 2766031 Y CN2766031 Y CN 2766031Y
- Authority
- CN
- China
- Prior art keywords
- central tube
- cone
- sleeve pipe
- pipe
- track pin
- 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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Abstract
The utility model relates to a casing pipe objetct-retaining plug used for plugging oil wells, which comprises a central pipe, a cone, a spring cylinder and a track pin, wherein the cone is fixed on the central pipe, the spring cylinder under the cone forms a sliding and rotating fit with the central pipe, and the track pin on the spring cylinder forms a sliding fit with an L-shaped track groove on the central pipe. When the central pipe is rotated, the position of the track pin can be shifted, so that bottom entering state of the casing pipe objetct-retaining plug can be shifted to the anchor state. A trapezoidal anchor block on the spring cylinder is embedded in the seaming part of a casing coupling so as to anchor the casing pipe objetct-retaining plug without hanging oil pipes, and people can lower to the position which is the distance of a casing pipe away from the well mouth. The utility model is accurate in positioning, can not slip and can retain falling objects without blocking the communication of the casing pipe.
Description
(1) technical field
The utility model belongs to field of petroleum exploitation, relates to a kind of control class downhole tool that stops junk in sleeve pipe, specifically, is sleeve pipe block material plug, is specially adapted to the oil well shut-in well and protects oil well at present near well head.
(2) background technology
In oil well Long-time Shut-down well shut-in period, often stolen or go to pot and make well head be in opening-wide state because of the well head facility, people are in curiosity or other reasons, often in well, throw foreign material, the down-hole situation is unclear when causing driving a well again, gives and to repair salvagings, bores plug, the recovery oil well production brings time and loss economically.
Existing packer, bridging plug are used as sleeve pipe block material plug use and be not suitable for, this normally is connected on the oil pipe because of packer, bridging plug and uses, time in the darker position of distance well head, and be cut off fully, the Sealed casing pipe space.For inactive well, do not need to be lowered to oil pipe in the well usually; The position that sleeve pipe block material plug is set wishes that apart from well head closely the position of an about sleeve pipe is so that the salvaging of junk; Sleeve pipe block material plug is only needed to stop junk, do not need to block the connection of sleeve pipe, because when driving a well again, also will exit or kill-job oil well.
Do not see as yet up to now and be specifically designed to the downhole tool that in sleeve pipe, stops junk.
(3) technology contents
The purpose of this utility model is: provide a kind of oil pipe that do not need to hang, can grappling in sleeve pipe, and can stop junk, do not block the downhole tool that sleeve pipe is communicated with again.
The purpose of this utility model is achieved in that
A kind of sleeve pipe block material plug, comprise central tube, cone, spring strut and track pin, the cone of upper end band bead is fixedlyed connected with central tube, the lower end of central tube is sealed, spring strut is positioned at the cone below, slide and be rotatably assorted with central tube, one or more L shaped rail grooves are arranged on this fitting face of central tube, on the annular solid of spring strut bottom by screw thread or pin-and-hole one or more track pin that are connected, the part that track pin is inwardly stretched out is slidingly matched with L shaped rail groove on the central tube, a plurality of finger-type leaf springs are arranged at spring strut top, the trapezoidal anchorage block of its oriented outer process in end, and the inner surface of each trapezoidal anchorage block can mesh with cone.
Screw thread can be arranged at the top at central tube, is used to connect the box cupling of top trough of belt, or other rotation, fishing joint.
Above the central tube blind end, some intercommunicating pores can be arranged.
Owing to adopt technique scheme, when track pin was positioned at L shaped rail groove horizontal segment, spring strut broke away from cone and axially locks with central tube, the distortion that can curve inwardly of finger-type leaf spring on the spring strut, reduced outside diameter is lowered in the sleeve pipe, and produces certain frictional force with sleeve pipe.When needing grappling sleeve pipe block material plug, the center of rotation pipe, make track pin be in vertical section of L shaped rail groove, in the central tube upper end application of force, the relative spring strut with cone of central tube moves down, it is descending to prop up spring strut by cone, when sleeve pipe block material plug runs into the casing coupling seam, the finger-type leaf spring outwards ejects under the effect of flexural deformation power, the trapezoidal anchorage block of its end embeds in the casing coupling seam, and cone continues descending, wedges each trapezoidal anchorage block inner surface, trapezoidal anchorage block can not inwardly be shunk again, so just sleeve pipe block material plug is anchored in the sleeve pipe.
Advantage of the present utility model is: do not need oil pipe to hang, and by the grappling of casing coupling seam, accurate positioning, position stability can slippage.Do not have slips, do not need big oil pipe weight grappling, can be following in the very near position of distance well head, be convenient to salvage.The central tube of cone and lower end closed can stop junk.Slit between the finger-type leaf spring and the intercommunicating pore on the central tube can keep sleeve pipe to be communicated with, venting and kill-job when being convenient to drive a well.The box cupling of central tube and upper end thereof can be salvaged for existing various oil pipe fishing tools.
(4) description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model is in the state of being lowered in sleeve pipe a schematic diagram;
Fig. 3 is the utility model is in the grappling state in sleeve pipe a schematic diagram;
Fig. 4 is the schematic diagram that the utility model finishes in the grappling of casing coupling seam crossing.
Among the figure: 1. groove, 2. box cupling, 3. screw thread, 4. central tube, 5. cone, 6. trapezoidal anchorage block, 7. finger-type leaf spring, 8. spring strut, 9. track pin, 10.L shape rail groove, 11. intercommunicating pores, 12. sleeve pipes, 13. casing couplings, 14. casing coupling seams.
(5) concrete enforcement
Below in conjunction with accompanying drawing the utility model is specifically described.
Shown in Figure 1: sleeve pipe block material plug comprises central tube (4), cone (5), spring strut (8) and track pin (9).The cone (5) of upper end band bead is fixedlyed connected with central tube (4), and the lower end of central tube (4) is sealed.Spring strut (8) is positioned at cone (5) below, slides and is rotatably assorted with central tube (4), and one or more L shaped rail grooves (10) are arranged on this fitting face of central tube (4).By screw thread or the pin-and-hole one or more track pin (9) that are connected, the part that track pin (9) is inwardly stretched out is slidingly matched with L shaped rail groove (10) on the central tube (4) on the annular solid of spring strut (8) bottom.A plurality of finger-type leaf springs (7) are arranged at spring strut (8) top, the trapezoidal anchorage block (6) of its oriented outer process in end, and the inner surface of each trapezoidal anchorage block (6) can mesh with cone (5).
Fig. 2 to Fig. 4 is an operating principle schematic diagram of the present utility model, has increased sleeve pipe (12) and casing coupling (13) among the figure.In casing coupling, between the end face of two sleeve pipes, formed one section annular, diameter is greater than the casing coupling seam (14) of casing inner diameter.
As shown in Figure 2, when track pin (9) was positioned at the horizontal segment of L shaped rail groove (10), sleeve pipe block material plug was in the state of being lowered to.At this moment, spring strut (8) breaks away from cone (5), and by track pin (9) and axially locking of central tube (4), and the finger-type leaf spring (7) on the spring strut (8) can flexural deformation, and reduced outside diameter is lowered in the sleeve pipe (12), and produces certain frictional force with sleeve pipe.Be lowered to state, sleeve pipe block material plug can be crossed casing coupling seam (14).
As shown in Figure 3, center of rotation pipe (4), track pin (9) is in vertical section of L shaped rail groove (10), and sleeve pipe block material plug is in the grappling state.Impose gravity (normally using the oil pipe force feed) in central tube upper end, central tube (4) moves down with respect to spring strut (8) with cone (5), and it is descending to prop up spring strut (8) by cone (5).
As shown in Figure 4, when sleeve pipe block material plug runs into casing coupling seam (14), finger-type leaf spring (7) outwards ejects under the effect of flexural deformation power, the trapezoidal anchorage block (6) of its end embeds casing coupling seam (14), cone (5) continues descending, wedge the inner surface of each trapezoidal anchorage block (6), trapezoidal anchorage block (6) can not be moved inward again, so just sleeve pipe block material plug is anchored in the sleeve pipe.
On the top of central tube (4) screw thread (3) can be arranged, be used to connect the box cupling (2) of top trough of belt (1), or other rotation, fishing joint.If with under the sleeve pipe block material plug at first sleeve pipe place of distance well head, can with the oil pipe pressurization, sleeve pipe block material plug be pushed into first casing coupling place grappling then at well head with the direct center of rotation pipe of hand (4) transfer trajectory.When needs descend many sleeve pipes following sleeve pipe block material plug, the instrument that available lower end has the in-line projection is connected the oil pipe lower end, with groove (1) engagement on box cupling (2) top, pushes sleeve pipe block material plug down to desired depth, center of rotation pipe (4) becomes the rail grappling then.Also can connect employing key, pin, isostructural rotation, fishing joint in central tube (4) upper end, finish same task.
In the time of need from well, pulling sleeve pipe block material plug out, can be lowered to oil pipe, drag for lance, fishing tool such as dipper docks with central tube (4) and on carry, make cone (5) break away from spring strut (8), trapezoidal anchorage block (6) can inwardly shrink to be got back in the sleeve pipe, sleeve pipe block material plug can be taken out from sleeve pipe.
Can there be some intercommunicating pores (11) or communicating slits in top at central tube (4) blind end, and the slit between finger-type leaf spring (7) is communicated with down the sleeve pipe block material beyond the Great Wall, so that venting and kill-job when driving a well once more.
Claims (3)
1. sleeve pipe block material plug, comprise central tube (4), cone (5), spring strut (8) is characterized in that with track pin (9): the cone (5) of upper end band bead is fixedlyed connected with central tube (4), the lower end of central tube (4) is sealed, spring strut (8) is positioned at cone (5) below, slide and be rotatably assorted with central tube (4), one or more L shaped rail grooves (10) are arranged on this fitting face of central tube (4), on the annular solid of spring strut (8) bottom by screw thread or the pin-and-hole one or more track pin (9) that are connected, the part that track pin (9) is inwardly stretched out is slidingly matched with L shaped rail groove (10) on the central tube (4), a plurality of finger-type leaf springs (7) are arranged at spring strut (8) top, the trapezoidal anchorage block (6) of its oriented outer process in end, the inner surface of each trapezoidal anchorage block (6) can mesh with cone (5).
2. sleeve pipe block material plug according to claim 1 is characterized in that: screw thread (3) can be arranged at the top of central tube, is used to connect the box cupling (2) of top trough of belt (1), or other rotation, fishing joint.
3. sleeve pipe block material plug according to claim 1 is characterized in that: can there be some intercommunicating pores (11) top at central tube (4) blind end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025115 CN2766031Y (en) | 2005-01-10 | 2005-01-10 | Sleeve plug for blocking junk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025115 CN2766031Y (en) | 2005-01-10 | 2005-01-10 | Sleeve plug for blocking junk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2766031Y true CN2766031Y (en) | 2006-03-22 |
Family
ID=36606695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520025115 Expired - Fee Related CN2766031Y (en) | 2005-01-10 | 2005-01-10 | Sleeve plug for blocking junk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2766031Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907124A (en) * | 2015-12-22 | 2017-06-30 | 中国石油天然气股份有限公司 | Packer central tube and packer |
| CN109736734A (en) * | 2019-01-10 | 2019-05-10 | 中国海洋石油集团有限公司 | It is a kind of to select to push locator by formula |
-
2005
- 2005-01-10 CN CN 200520025115 patent/CN2766031Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106907124A (en) * | 2015-12-22 | 2017-06-30 | 中国石油天然气股份有限公司 | Packer central tube and packer |
| CN109736734A (en) * | 2019-01-10 | 2019-05-10 | 中国海洋石油集团有限公司 | It is a kind of to select to push locator by formula |
| CN109736734B (en) * | 2019-01-10 | 2020-12-29 | 中国海洋石油集团有限公司 | Selective pass type press-down positioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |