CN2876318Y - Admissible drillable high pressure bridge plug - Google Patents
Admissible drillable high pressure bridge plug Download PDFInfo
- Publication number
- CN2876318Y CN2876318Y CN 200520105699 CN200520105699U CN2876318Y CN 2876318 Y CN2876318 Y CN 2876318Y CN 200520105699 CN200520105699 CN 200520105699 CN 200520105699 U CN200520105699 U CN 200520105699U CN 2876318 Y CN2876318 Y CN 2876318Y
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- CN
- China
- Prior art keywords
- central tube
- mandrel
- cone
- release piece
- high pressure
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- 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 - Lifetime
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Abstract
A kind of high-pressure bridge plug, which can fetch and drill, includes a core axis, a center tube, a two-way anchoring device, a sealing component, an upper and lower locking device and a unblocking device; the upper part of the center tube is assembled on the core axis through the releasing claw; the lower part of the center tube is assembled on the core axis through the lower releasing claw; the two-way anchoring device includes an upper cone, sheathing, slip, spring, lower cone and a lower steel set; the upper cone, slip and the lower cone are assembled on the lower part of the center tube; the protective set is assembled on the upper cone; the lower steel set is assembled on the lower cone. The utility model has the following features: the operation of scene setting, salvage and unblocking is easy; the construction is convenient and reliable; the upper and lower pressure difference of the bridge plug is large (up to 70MPa); the success rate in one-time use is high; even in the case of unsuccessful unblocking, the drilling mill can be easily used to unblock, and the overhaul accidents under the well will not be caused, and so on. The model is particularly applicable to measures of the tubular technology in the oil field exploration, the blocking of the bottom water of the oil gas well in development, the acid pressure of the selected layer and the upward trial oil, etc.
Description
One, technical field:
The utility model relates to the bridging plug of oil gas well in oil field prospecting, the exploitation, is a kind of desirable high pressure bridging plug that bores, be specially adapted to oil gas well in oil field prospecting, the exploitation bottom water plugging, choosing layer acid fracturing and on return in the tubing string technological measure such as formation testing.
Two, background technology:
In the oil field prospecting development process, owing in the oily vapour well a plurality of series of strata are often arranged, and the series of strata nature difference is bigger, in order better to understand the different qualities of each series of strata, formation testing by layer is absolutely necessary, and in the increasing yield and injection measure, also to often carry out separate stratum fracfturing, separate layer acid treatment, in various measure tubing strings, the use of bridging plug is necessary.What the most generally adopts according to different operating modes at present both at home and abroad is drillable bridging plug or detachable bridge plug, and they respectively have pluses and minuses: the drillable bridging plug holds bidirectional pressure difference height, sealing for a long time, but deblocking release expense height; Detachable bridge plug holds the pressure reduction height, hold down that pressure reduction is general, the sealing time is not long, but deblocking release expense is low.
Three, summary of the invention:
The utility model provides a kind of desirable high pressure bridging plug that bores, and has overcome the deficiency of above-mentioned prior art, and it sets, salvages simple, the easy construction of unsealing operation, and is safe and reliable, seals of long durationly, bears the bidirectional pressure difference height.
The technical solution of the utility model realizes by following measure: a kind of desirable high pressure bridging plug that bores, it comprises mandrel, central tube, bidirectionally anchoring device, black box, twin-lock is decided device reconciliation seal apparatus up and down, the top of central tube is sleeved on the mandrel by release piece, and the bottom of central tube is sleeved on the mandrel by following release piece; The bidirectionally anchoring device comprises upper cone, sheath, slips, spring, lower cone and following steel bushing, and upper cone, slips and lower cone are sleeved on the bottom of central tube, and sheath is sleeved on the upper cone, and following steel bushing is sleeved on the lower cone; Black box comprises and protects part, limit packing element, middle packing element and support ring, is set with on the central tube on upper cone top and protects part, limit packing element, middle packing element and support ring; Twin-lock is decided device and is comprised gland and lock ring up and down, between central tube and the upper cone lock ring is installed, be set with gland on the central tube that protects the part top, between the bottom of last gland and central tube, lock ring be installed, between the top of last gland and central tube, safe shear pin is being installed; The deblocking device comprises mandrel, release cover, shear pin, moment of torsion pin, release piece, lock ring, following release piece, following gland and baffle ring, the lower end of last mandrel is installed in the top of mandrel, discharging cover is installed on the mandrel by shear pin, the moment of torsion pin is installed on last mandrel, between the bottom of the top of lower cone and following gland baffle ring is installed, the top of following gland is installed on the lower cone by shear pin.
Be further optimization and/or improvements below to above-mentioned technical solutions of the utility model:
Hanging platform can be arranged and can tangle hanging platform on its corresponding central tube in the lower inside of upper cone, make the upper cone can not be along central tube to top offset.
Above-mentioned slips can be the ship shape slips, and its profile of tooth base two angles are respectively 30 ° and 60 °, and its low-angle opening of 30 ° all points to the slips center.
Between above-mentioned central tube and the release piece or between release piece and the mandrel O-ring seals is being installed.
Between above-mentioned central tube and the release piece and between release piece and the mandrel O-ring seals is being installed.
The utlity model has following characteristics: the scene sets, salvaging, unsealing operation is simple, easy construction is reliable; Bridging plug bears upper and lower pressure reduction big (reaching as high as 70MPa), uses the one-time success rate height; Can not cause down-hole overhaul accident etc. even under the situation that deblocking does not fall, be easy to by boring the mill deblocking yet.It is specially adapted to oil gas well in oil field prospecting, the exploitation bottom water plugging, choosing layer acid fracturing and on return in the tubing string technological measure such as formation testing.
Four, description of drawings:
Accompanying drawing 1 is looked the half section structural representation for the master of the utility model most preferred embodiment.
Coding in the accompanying drawing is respectively: 1 is last mandrel, and 2 for discharging cover, and 3 is shear pin, and 4 is the moment of torsion pin, 5 is safe shear pin, and 6 is release piece, and 7 is last gland, and 8 and 9 all is O-ring seals, 10 is lock ring, and 11 for protecting part, and 12 is the limit packing element, and 13 is middle packing element, 14 is central tube, and 15 is support ring, and 16 is mandrel, and 17 is upper cone, 18 is sheath, and 19 is slips, and 20 is spring, and 21 is lower cone, 22 are following release piece, and 23 are steel bushing down, and 24 are gland down, and 25 is baffle ring.
Five, the specific embodiment:
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
As shown in Figure 1, this is desirable to bore that the high pressure bridging plug comprises mandrel 16, central tube 14, bidirectionally anchoring device, black box, twin-lock is decided device and conciliate seal apparatus up and down, the top of central tube 14 is sleeved on the mandrel 16 by release piece 6, and the bottom of central tube 14 is sleeved on the mandrel 16 by following release piece 22; The bidirectionally anchoring device comprises upper cone 17, sheath 18, slips 19, spring 20, lower cone 21 and following steel bushing 23, upper cone 17, slips 19 and lower cone 21 are sleeved on the bottom of central tube 14, sheath 18 is sleeved on the upper cone 17, and following steel bushing 23 is sleeved on the lower cone 21; Black box comprises and protects part 11, limit packing element 12, middle packing element 13 and support ring 15, is set with on the central tube 14 on upper cone 17 tops and protects part 11, limit packing element 12,13 in middle glue and support ring 15; Twin-lock is decided device and is comprised gland 7 and lock ring 10 up and down, between central tube 14 and the upper cone 17 lock ring 10 is installed, on the central tube 14 that protects part 11 tops, be set with gland 7, between the bottom of last gland 7 and central tube 14, lock ring 10 is installed, between the top of last gland 7 and central tube 14, safe shear pin 5 is installed; The deblocking device comprises mandrel 1, release cover 2, shear pin 3, moment of torsion pin 4, release piece 6, lock ring 10, following release piece 22, following gland 24 and baffle ring 25, the lower end of last mandrel 1 is installed in the top of mandrel 16, discharging cover 2 is installed on the mandrel 1 by shear pin 3, on last mandrel 1, moment of torsion pin 4 is installed, retaining 25 rings are installed between the bottom of the top of lower cone 21 and following gland 24, and the top of following gland 24 is installed on the lower cone 21 by shear pin 3.
In order further to optimize performance of the present utility model, as shown in Figure 1, the lower inside of upper cone 17 has hanging platform and can tangle hanging platform on its corresponding central tube 14, makes the upper cone 17 can not be along central tube 14 to top offset; Slips 19 is the ship shape slips, and its profile of tooth base two angles are respectively 30 ° and 60 °, and its low-angle opening of 30 ° all points to the slips center; Between central tube 14 and release piece 6, O-ring seals is installed; Between release piece 6 and mandrel 16, O-ring seals is installed.
In the utility model, central tube, go up gland, lock ring, protect part, limit packing element, middle packing element, support ring, upper cone, sheath, slips, lower cone, down steel bushing, gland and baffle ring are all made by boring material down.
The foregoing description has stronger compliance and best implementation result, but can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
Operating principle of the present utility model: this desirable last mandrel 1 place of boring the high pressure bridging plug is set running tool with the bolt of giving up with bridging plug be connected, send into purpose envelope position, down-hole by oil pipe, when this desirable high pressure bridging plug that bores behind the precalculated position, in oil pipe, drop into one piece of steel ball by ground, after treating that ball is fallen bridging plug setting tool ball seat, oil pipe is built the pressure, this moment, the bridging plug setting tool was under the effect of extraneous pressure, its central tube will be subjected to thrust upwards, piston jacket will be subjected to downward thrust, piston jacket is under thrust, with descending and will descend thrust to pass to this desirable last gland 7 that bores the high pressure bridging plug, and last gland 7 is cut off the shear pin 3 on safe shear pin 5 and the upper cone 17 under thrust, at compression limit packing element 12, in packing element 13 time, the descending sideband in limit moves lock ring 10, upper cone 17 moves downward, strut slips 19 and make the tight sleeve pipe of its anchor, twin-lock is decided device and will firmly be locked each motion compresses part up and down, this desirable high pressure bridging plug that bores can not move, be subjected to upwards the bridging plug setting tool central tube of thrust simultaneously and will break with this and desirablely bore the bolt of giving up that the high pressure bridging plug is connected, realization is desirable bores setting of high pressure bridging plug, the process of giving up.Only need be lowered to fishing tool during salvaging, catch this desirable release cover 2 that bores the high pressure bridging plug by simply transferring tubing string, during the upper lifting pipe post, the shear pin 3 that discharges on the cover 2 will be cut off, discharge the cover 2 up spaces of abdicating, this moment, release piece 6 was disengaged constraint, this desirable mandrel 16 that bores the high pressure bridging plug continues up under the effect of upper lifting force, following release piece 22 is disengaged constraint, when the hanging platform of mandrel 16 bottoms is run into down release piece 22 roots, it is up to carry this desirable central tube 14 that bores the high pressure bridging plug, this moment is desirable limit packing element 12 that bores the high pressure bridging plug originally, in the suffered sleeve friction power of packing element 13 and slips 19 suffered casing pressure component in vertical direction they are moved downward, they can drive support ring 15 simultaneously, the lock ring 10 of bottom, upper cone 17, sheath 18, lower cone 21, following steel bushing 23, following gland 24 moves downward together, the bidirectionally anchoring device and up and down twin-lock decide device and discharged by deblocking, whole the desirable high pressure bridging plug that bores realized deblocking, the hanging platform that the desirable upper cone 17 that bores the high pressure bridging plug of the basis of deblocking is connected following release piece 22 places on the central tube 14 tangles, like this this desirable bore carry in the process all on high pressure bridging plug whole inside and outside parts all well can be proposed safely.If this desirable high pressure bridging plug that bores is owing to foreign matter in the well causes deblocking smoothly, can fall this desirable bored parts that bore the high pressure bridging plug by following special packaged milling tool milling, the desirable twin-lock up and down that bores the high pressure bridging plug of this sample is decided device and is released, this desirable high pressure bridging plug that bores is discharged by deblocking, this desirable central tube 14 that bores the high pressure bridging plug can be caught by quilt cover miller tool simultaneously, just can propose well to the desirable residual body that bores the high pressure bridging plug of the basis that has discharged smoothly, thereby can not cause the overhaul of downhole tool.
Claims (7)
1, a kind of desirable high pressure bridging plug that bores, it is characterized in that comprising mandrel, central tube, bidirectionally anchoring device, black box, twin-lock is decided device and is conciliate seal apparatus up and down, the top of central tube is sleeved on the mandrel by release piece, and the bottom of central tube is sleeved on the mandrel by following release piece; The bidirectionally anchoring device comprises upper cone, sheath, slips, spring, lower cone and following steel bushing, and upper cone, slips and lower cone are sleeved on the bottom of central tube, and sheath is sleeved on the upper cone, and following steel bushing is sleeved on the lower cone; Black box comprises and protects part, limit packing element, middle packing element and support ring, is set with on the central tube on upper cone top and protects part, limit packing element, middle packing element and support ring; Twin-lock is decided device and is comprised gland and lock ring up and down, between central tube and the upper cone lock ring is installed, be set with gland on the central tube that protects the part top, between the bottom of last gland and central tube, lock ring be installed, between the top of last gland and central tube, safe shear pin is being installed; The deblocking device comprises mandrel, release cover, shear pin, moment of torsion pin, release piece, lock ring, following release piece, following gland and baffle ring, the lower end of last mandrel is installed in the top of mandrel, discharging cover is installed on the mandrel by shear pin, the moment of torsion pin is installed on last mandrel, between the bottom of the top of lower cone and following gland baffle ring is installed, the top of following gland is installed on the lower cone by shear pin.
2, the desirable high pressure bridging plug that bores according to claim 1, the lower inside that it is characterized in that upper cone have hanging platform and can tangle hanging platform on its corresponding central tube, make the upper cone can not be along central tube to top offset.
3, the desirable high pressure bridging plug that bores according to claim 1 and 2 is characterized in that slips is the ship shape slips, and its profile of tooth base two angles are respectively 30 ° and 60 °, and its low-angle opening of 30 ° all points to the slips center.
4, the desirable high pressure bridging plug that bores according to claim 1 and 2 is characterized in that between central tube and the release piece or between release piece and the mandrel O-ring seals being installed.
5, the desirable high pressure bridging plug that bores according to claim 3 is characterized in that between central tube and the release piece or between release piece and the mandrel O-ring seals being installed.
6, the desirable high pressure bridging plug that bores according to claim 1 and 2 is characterized in that between central tube and the release piece and between release piece and the mandrel O-ring seals being installed.
7, the desirable high pressure bridging plug that bores according to claim 3 is characterized in that between central tube and the release piece and between release piece and the mandrel O-ring seals being installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520105699 CN2876318Y (en) | 2005-09-02 | 2005-09-02 | Admissible drillable high pressure bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520105699 CN2876318Y (en) | 2005-09-02 | 2005-09-02 | Admissible drillable high pressure bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2876318Y true CN2876318Y (en) | 2007-03-07 |
Family
ID=37819555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520105699 Expired - Lifetime CN2876318Y (en) | 2005-09-02 | 2005-09-02 | Admissible drillable high pressure bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2876318Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550815B (en) * | 2009-04-08 | 2012-05-30 | 中国石油天然气股份有限公司 | A bridge plug that blocks off oil tube |
| CN106089145A (en) * | 2011-08-22 | 2016-11-09 | 井下技术有限责任公司 | A kind of plug for downhole tool |
| CN110821442A (en) * | 2019-12-02 | 2020-02-21 | 大庆益科石油科技开发有限公司 | Integral fishable and drillable bridge plug |
-
2005
- 2005-09-02 CN CN 200520105699 patent/CN2876318Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550815B (en) * | 2009-04-08 | 2012-05-30 | 中国石油天然气股份有限公司 | A bridge plug that blocks off oil tube |
| CN106089145A (en) * | 2011-08-22 | 2016-11-09 | 井下技术有限责任公司 | A kind of plug for downhole tool |
| CN110821442A (en) * | 2019-12-02 | 2020-02-21 | 大庆益科石油科技开发有限公司 | Integral fishable and drillable bridge plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150902 Granted publication date: 20070307 |
|
| EXPY | Termination of patent right or utility model |