CN2674080Y - High pressure recovery bridge plug - Google Patents
High pressure recovery bridge plug Download PDFInfo
- Publication number
- CN2674080Y CN2674080Y CN 200420038075 CN200420038075U CN2674080Y CN 2674080 Y CN2674080 Y CN 2674080Y CN 200420038075 CN200420038075 CN 200420038075 CN 200420038075 U CN200420038075 U CN 200420038075U CN 2674080 Y CN2674080 Y CN 2674080Y
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- China
- Prior art keywords
- high pressure
- cone
- slips
- central tube
- recyclable
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- Expired - Fee Related
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Abstract
The utility model discloses a high pressure reclaimable bridge plug used in oil industry. It is composed of an upper joint, a center pipe, an upper cone, a lower cone, pastern canisters, a female-tensioned ring, a male-tensioned ring, slips, a seat seal pushing-down mechanism, etc. The seat seal pushing-down mechanism is composed of a positioning pin, a pressing sleeve and a self-locking ring. The upper cone and the lower cone are installed on both ends of the slips, and the upper pastern canister and the lower pastern canister are installed on both ends of the upper cone and the lower cone. A seat seal pushing-up mechanism is installed in the lower part of the lower pastern canister, and an unsealing mechanism is installed inside the center pipe. This tool is a reclaimable layer sealing tool which can bear bidirectional high pressure. Matched with corresponding technical skills, the tool can effectively carry on compartmentation to various high pressure and special operating wells, such as deep wells and super-deep wells, and producing wells, which improves the operating speed and the technical reliability. The tool has the advantages of simple structure, high bidirectional pressure bearing and exact position and is reliable on unsealing the seat seal.
Description
Technical field
The utility model belongs to the recyclable bridging plug of petroleum industry underground work seal instrument, particularly high pressure, and being applicable to needs packing engineering between formation testing by layer and production horizon.
Technical background
In oil exploration and development process, seal is a very important flow chart, according to different work purpose needs packing is carried out in the different layers position, so that system, estimate formation characteristics exactly, science, reasonably formulate development plan, comprise that layer is done in formation testing by layer, separate stratum fracfturing acidifying, selective sand control, seperated layer water injection, layerwise production and shut off water, sealing, layer or the like is discarded in sealing, bridging plug is the necessary device that makes that above-mentioned technology is achieved.Seal technology is divided into mechanical type seal, cementing seal.The shortcoming of cementing seal is hour can not construct at overflow well, absorption well and layer thickness, need bore upper and lower layer of connection of cement plug recovery simultaneously when returning construction needs under.The advantage of machinery seal is that tool construction is little, speed of application is fast, but there is withstand voltage difference problem low and milling difficulty when returning down in the bridging plug that uses in the mechanical seal technology, can not satisfy the high-voltage construction requirement, increase the postorder difficulty of construction, thereby increase cost of production.Along with going deep into of oil, gas exploration, deep-well, ultradeep well, gas well construction quantity and other special operations involving high pressure well quantity present ascendant trend, adopt traditional seal instrument can not satisfy production requirement, promote the product technology performance, develop the new tool and the related process technology that satisfy the high-voltage construction needs, significant to the production contradiction that solution becomes increasingly conspicuous.
Summary of the invention
The purpose of this utility model is to make the recyclable bridging plug of high pressure, overcomes defective of the prior art, solves the upper and lower pressure-bearing of common bridging plug and differs greatly, and withstand voltage low problem makes the seal success smoothly, and recyclable performance is good, reduces production costs.
Use the present technique solution can reach above-mentioned purpose: the recyclable bridging plug of high pressure, comprise top connection, central tube, upper cone, lower cone, packing element, mother rise ring, public affairs rise ring, slips and seat envelope push-down machine structure, seat envelope push-down machine structure is made up of shop bolt, gland, self-locking ring, be installed in the top of packing element, install cone and lower cone at the two ends of slips; Install packing element and lower rubber cylinder in the two ends of upper/lower cone, the bottom mount pad of lower rubber cylinder is sealed up pushing mechanism; Install in the central tube and separate sealing mechanism.
The utility model compared with prior art has following outstanding feature: slips is an overall structure, has a plurality of conical surfaces to engage with the upper/lower cone inner surface, and the contact area of external surface and sleeve pipe is big; Slips is in two packing elements middle part, avoids sand and other object to contact with slips, and the seat envelope is reliable.The deblocking central tube conical surface of separating sealing mechanism can make tool into as a whole with deblocking pin location after being pressed into elastic center pipe inner conical surface.When returning the understratum under needing, can be recycled to ground by salvaging.The machinery seal uses this instrument, and the seal operation effectiveness is reliable, is a kind of recyclable seal instrument that can bear bidirectional high-pressure.Supporting corresponding technology can effectively be separated deep-well, ultradeep well, high-pressure well, high pressure special construction well, improve the reliability of speed of application and technology, be specially adapted to special constructions such as deep-well, gas well, short lap, high pressure zone, lost-circulation zone, operation on the sea.Overcome long, shortcoming such as pressure-bearing is low, difficult milling, deblocking load are big of the construction complexity, the time that exist in other technology construction.This apparatus structure is simple, bidirectional bearing is high, the position is accurate, seat envelope deblocking is reliable.
Description of drawings
Accompanying drawing 1 is first figure of the utility model structural representation.
Accompanying drawing 2 is second figure of the utility model structural representation.
Among the figure: top connection 1, shop bolt 2, gland 3, self-locking ring 4, deblocking pin 5, central tube 6, deblocking central tube 7, last packing element 8, female expansion ring 9, male expansion ring 10, upper cone 11, slips 12, lower cone 13, elastic center pipe 14, lower rubber cylinder 15, piston 16, guiding valve 17, seat envelope bolt 18.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description: referring to attached Fig. 1 and 2, the recyclable bridging plug of high pressure, comprise top connection 1, central tube 6, upper cone 11, lower cone 13, go up packing element 8, female expansion ring 9, male expansion ring 10 and slips 12 and seat envelope push-down machine structure, seat envelope push-down machine structure is made up of shop bolt 2, gland 3 and self-locking ring 4, installs cone 11 and lower cone 13 at the two ends of slips 12.Install packing element 8 and lower rubber cylinder 15 in the two ends of upper/lower cone 11 and 13, the bottom mount pad of lower rubber cylinder 15 is sealed up pushing mechanism; Install in the central tube 6 and separate sealing mechanism.Separate sealing mechanism and be made up of deblocking central tube 7, elastic center pipe 14 reconciliation offset nails 5, deblocking central tube 7 lower ends are pressed in the upper end internal taper hole of elastic center pipe 14, are fixed on the central tube 6 by deblocking pin 5.The upper-end inner diameter of deblocking central tube 7 has step, and the lower end external diameter is that taper matches with the inner conical surface of the upper end endoporus of elastic center pipe 14; The bottom of elastic center pipe 14 and middle part external diameter have step, and its top external diameter has screw thread, has 1 vertical slot to the top at least.Seat is sealed up pushing mechanism and is made up of piston 16, guiding valve 17 and seat envelope bolt 18, piston 16 is contained in the guiding valve 17, the lower step place that seat envelope bolt 18 is contained in guiding valve 17 connects with guiding valve 17, and sealing bolt 18 has an external diameter that the center attachment bolt of screw thread is arranged, and is set on the center of pushing mechanism.Guiding valve 17 middle parts radially are provided with pressure transmission hole or pressure transmission groove; The external diameter two ends of piston 16 are provided with seal.Slips 12 is provided with the whole slips that engages the conical surface for the two ends external diameter is provided with card tooth, internal diameter, Ka Ya and engage the conical surface towards on the contrary, the cylindrical shell of slips 12 has 2 vertical slots from top to bottom, from bottom to top at least, the perforation end of vertical slot is staggered.The upper-end inner diameter of top connection 1 is provided with step, and the radial width of its step is advisable with restriction deblocking central tube 7 outer scurrying.
The connected mode of the recyclable bridging plug of high pressure is: central tube 6, elastic center pipe 14 are connected as a single entity by upper cone 11, slips 12, lower cone 13; Gland 3, self-locking ring 4, last packing element 8, female expansion ring 9, male expansion ring 10 are enclosed within the upper end of central tube 6, and to lower compression, shop bolt 2 combines as a whole gland 3 and top connection 1 to the only permission power of structure of self-locking ring 4 by gland 3; The upper end of elastic center pipe 14 is a notching construction, and external surface is threaded with central tube 6 and connects, and the deblocking central tube 7 lower end conical surfaces are located with deblocking pin 5 after being pressed into elastic center pipe 14 inner conical surfaces; Piston 16 and seat envelope bolt 18 are housed in the guiding valve 17.
Preceding this instrument of work connects guiding valve 17 by a seat envelope bolt 18, and the center attachment bolt and the special-purpose assorted seat envelope instrument that are sealed bolt 18 by seat link together.The active force that seat envelope instrument produces during work is pressed in downwards and cuts off on the upper surface of gland 3 that shop bolt 2 backs are continued to promote self-locking rings 4, gone up packing element 8, female expansion ring 9, male expansion ring 10, upper cone 11, slips 12 are descending, make that packing element 8 distortion is outer expands, 12 of slips are in internal surface of sleeve pipe.At following envelope of reaction force acts bolt 18 pulling guiding valves 17, lower rubber cylinder 15, elastic center pipe 14, central tube 6, deblocking central tube 7 up compression lower rubber cylinders 15, final upward packing element 8, the lower rubber cylinder 15 Seal Oil cover annular space realized, slips 12 is positioned at the duty of internal surface of sleeve pipe in upper cone 11 and lower cone 13 effect lower supports.
The split-type fishing spear is lowered to deblocking central tube 7 inner chambers during the deblocking construction, and piston 16 pushed open downwards the recyclable bridging plug of high pressure is communicated with up and down reach pressure balance, on carry and cut off deblocking pin 5 and drag for joint 1, under the transmission of power, drive central tube 6, upper cone 11 is up, the conical surface that slips 12 engages with upper cone 11 is thrown off, and realizes the deblocking of instrument is salvaged.
Claims (7)
1, the recyclable bridging plug of high pressure, comprise top connection (1), central tube (6), upper cone (11), lower cone (13), female expansion ring (9) and male expansion ring (10), packing element and slips (12) and seat envelope push-down machine structure, seat envelope push-down machine structure is made up of shop bolt (2), gland (3), self-locking ring (4), install cone (11) and lower cone (13) at the two ends of slips (12), it is characterized in that installing packing element (8) and lower rubber cylinder (15) in the two ends of upper/lower cone (11) and (13), the bottom mount pad of lower rubber cylinder (15) is sealed up pushing mechanism; Install in the central tube (6) and separate sealing mechanism.
2, the recyclable bridging plug of high pressure according to claim 1, it is characterized in that separating sealing mechanism is made up of deblocking central tube (7), elastic center pipe (14) reconciliation offset nail (5), deblocking central tube (7) lower end is pressed in the upper end endoporus of elastic center pipe (14), is fixed on the central tube (6) by deblocking pin (5).
3, the recyclable bridging plug of high pressure according to claim 2 is characterized in that the upper-end inner diameter of deblocking central tube (7) has step, and the lower end external diameter is that taper matches with the interior chamfering of the upper end endoporus of elastic center pipe (14); The bottom and the middle part external diameter of elastic center pipe (14) have step, and its top external diameter has screw thread, has 1 vertical slot to the top at least.
4, the recyclable bridging plug of high pressure according to claim 1, the last pushing mechanism that it is characterized in that the seat envelope is made up of piston (16), guiding valve (17) and seat envelope bolt (18), piston (16) is contained in the guiding valve (17), the lower step place that seat envelope bolt (18) is contained in guiding valve (17) connects with guiding valve (17), seat envelope bolt (18) is provided with an external diameter has the center of screw thread to connect bolt, is set on the center of pushing mechanism.
5, the recyclable bridging plug of high pressure according to claim 4 is characterized in that guiding valve (17) middle part radially is provided with pressure transmission hole or pressure transmission groove; The external diameter two ends of piston (16) are provided with seal.
6, the recyclable bridging plug of high pressure according to claim 1, it is characterized in that slips (12) is for the two ends external diameter is provided with the card tooth, internal diameter is provided with the whole slips that engages the conical surface, the card tooth and engage the conical surface towards on the contrary, at least have 2 vertical slots on the cylindrical shell of slips (12) from top to bottom, from bottom to top, the perforation end of vertical slot is staggered.
7, the recyclable bridging plug of high pressure according to claim 1 is characterized in that the upper-end inner diameter of top connection (1) is provided with step, and the radial width of its step is advisable with outer the scurrying of restriction deblocking central tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038075 CN2674080Y (en) | 2004-01-18 | 2004-01-18 | High pressure recovery bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038075 CN2674080Y (en) | 2004-01-18 | 2004-01-18 | High pressure recovery bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2674080Y true CN2674080Y (en) | 2005-01-26 |
Family
ID=34483948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420038075 Expired - Fee Related CN2674080Y (en) | 2004-01-18 | 2004-01-18 | High pressure recovery bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2674080Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539078A (en) * | 2012-02-17 | 2012-07-04 | 中国石油天然气股份有限公司 | Split-type repeatable testing device |
| CN102686824A (en) * | 2009-12-18 | 2012-09-19 | 哈利伯顿能源服务公司 | Retrieval method for opposed slip type packers |
| CN103174398B (en) * | 2011-12-23 | 2016-03-16 | 中国石油化工股份有限公司 | A kind of drillable press-fracturing bridge plug |
| CN108150130A (en) * | 2016-12-06 | 2018-06-12 | 中国石油天然气股份有限公司 | A kind of press-fracturing bridge plug |
-
2004
- 2004-01-18 CN CN 200420038075 patent/CN2674080Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102686824A (en) * | 2009-12-18 | 2012-09-19 | 哈利伯顿能源服务公司 | Retrieval method for opposed slip type packers |
| CN102686824B (en) * | 2009-12-18 | 2015-09-16 | 哈利伯顿能源服务公司 | The retrieval methods of relative sliding type packer |
| CN103174398B (en) * | 2011-12-23 | 2016-03-16 | 中国石油化工股份有限公司 | A kind of drillable press-fracturing bridge plug |
| CN102539078A (en) * | 2012-02-17 | 2012-07-04 | 中国石油天然气股份有限公司 | Split-type repeatable testing device |
| CN102539078B (en) * | 2012-02-17 | 2014-09-03 | 中国石油天然气股份有限公司 | Split-type repeatable testing device |
| CN108150130A (en) * | 2016-12-06 | 2018-06-12 | 中国石油天然气股份有限公司 | A kind of press-fracturing bridge plug |
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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 |