CN105370243A - Multifunctional oil pipe float collar - Google Patents
Multifunctional oil pipe float collar Download PDFInfo
- Publication number
- CN105370243A CN105370243A CN201510877936.7A CN201510877936A CN105370243A CN 105370243 A CN105370243 A CN 105370243A CN 201510877936 A CN201510877936 A CN 201510877936A CN 105370243 A CN105370243 A CN 105370243A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve base
- land
- float collar
- oil pipe
- 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.)
- Pending
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
Abstract
The invention relates to the oil pipe float valve apparatus technical field, and refers to a multifunctional oil pipe float collar comprising a body, a valve seat, a valve, a torsion spring, a seal ring, a jack screw, and a salvage basket; the inner wall of the body is provided with an upper ring platform and a lower ring platform from top to bottom, and the inner diameter of the upper and lower ring platforms gradually decreases; the top end face of the lower ring platform is provided with the valve seat matched with the inner diameter of the upper ring platform; the valve seat is an annular sleeve; the inner diameter of the valve seat is smaller than that of the lower ring platform; the inner wall of the lower portion of the valve seat is a cone annular surface with small top and big bottom; the valve is a cone platform with small top and big bottom. The multifunctional oil pipe float collar is reasonable and compact in structure, convenient in usage, can effectively prevent well inner fluid from backflowing through the oil pipe, can prevent blowout accidents, thus improving safety of imbalanced well-completion practice; the multifunctional oil pipe float collar can prevent oil pipe blowout under imbalance, can realize gas lift commissioning, and can realize one trip string fracture reconstruction, thus saving lower pipe lifting time, and improving exploitation efficiency.
Description
Technical field
the present invention relates to oil pipe float valve device technique field, is a kind of Multifunctional oil-pipe float collar.
Background technology
when implementing insufficient balance well completion operation, if when the situation of not installing oil pipe blowout instrument on oil pipe carries out lower oil pipe operation, stratum flows through oil pipe and will flow backwards, light then that well head can be made to operate is very inconvenient, heavy then well control can be caused out of control, cause serious consequence, but if heavy sizing pressure down-hole oil tube is adopted when implementing insufficient balance well completion, heavy sizing has just killed stratum, and do not reach underbalance object, so overall process under-balance just loses meaning.
Summary of the invention
the invention provides a kind of Multifunctional oil-pipe float collar, overcome the deficiency of above-mentioned prior art, it can effectively solve the problem that in insufficient balance well completion operation, under no killing well, oil pipe easily sprays.
technical scheme of the present invention is realized by following measures: a kind of Multifunctional oil-pipe float collar, comprises body, valve base, valve, torsion spring, joint ring, jackscrew and junk basket, the inwall of body is provided with upper land and lower land that internal diameter reduces successively from top to bottom, the valve base of external diameter and upper land diameter compatible is had at the seat of honour, upper surface of lower land, valve base is circular cylinder, the internal diameter of valve base is less than the internal diameter of lower land, the lower inner wall of valve base is up-small and down-big conical ring face, valve is up-small and down-big frustum, two torque arm of torsion spring are fixedly installed togather with the lower surface of valve base and the lower surface of valve respectively and make valve be sealed in valve base bottom, the joint ring of external diameter and upper land diameter compatible is had at the seat of honour, upper surface of valve base, jackscrew is installed with in upper land inner chamber above joint ring, the upper end of jackscrew is not higher than the upper surface of upper land, the lower surface of jackscrew and the upper surface of joint ring offset, the lower surface of joint ring and the upper surface of valve base offset, junk basket is the staving of lower end sealing, and the upper inside wall of junk basket and the bottom outer wall of body are fixedly installed togather, and the junk basket below body is evenly equipped with through hole.
here is the further optimization and/or improvements to foregoing invention technical scheme:
the upper surface of above-mentioned lower land is up big and down small conical ring face, and the bottom of valve base is the frustum matched with the conical ring face of lower land upper surface.
the upper surface of above-mentioned upper land is up big and down small conical ring face.
above-mentionedly between valve base and upper land, be installed with sealing ring, between valve base and valve, be installed with sealing ring.
the upper inside wall of above-mentioned junk basket and the bottom outer wall of body are fixedly installed togather by screw thread, and internal thread is arranged at the top of body.
reasonable and compact in structure of the present invention, easy to use, can effectively prevent borehole fluid from being flow backwards by oil pipe, prevent gas blowout accident from occurring, improve insufficient balance well completion job safety, realize the object of oil pipe blowout under underbalance, gaslift operation, fracturing reform one-trip string further, saved a lower tubular column time, improve production efficiency.
Accompanying drawing explanation
accompanying drawing 1 is that the master of preferred embodiment looks half section structural representation.
coding in accompanying drawing is respectively: 1 is body, and 2 is upper land, and 3 is lower land, and 4 is valve base, and 5 is valve, and 6 is torsion spring, and 7 is joint ring, and 8 is jackscrew, and 9 is junk basket, and 10 is through hole, tapping pin centered by 11, and 12 is level pressure plug, and 13 is sealing ring, and 14 is through hole.
Detailed description of the invention
the present invention by the restriction of following embodiment, can not determine concrete embodiment according to technical scheme of the present invention and actual conditions.
in the present invention, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of upper and lower, left and right etc. determines according to the Butut direction of Figure of description.
below in conjunction with embodiment and accompanying drawing, the invention will be further described:
as shown in Figure 1, this Multifunctional oil-pipe float collar comprises body 1, valve base 4, valve 5, torsion spring 6, joint ring 7, jackscrew 8 and junk basket 9, the inwall of body 1 is provided with upper land 2 and lower land 3 that internal diameter reduces successively from top to bottom, the valve base 4 of external diameter and upper land 2 diameter compatible is had at the seat of honour, upper surface of lower land 3, valve base 4 is circular cylinder, the internal diameter of valve base 4 is less than the internal diameter of lower land 3, the lower inner wall of valve base 4 is up-small and down-big conical ring face, valve 5 is in up-small and down-big frustum, two torque arm of torsion spring 6 are fixedly installed togather with the lower surface of valve base 4 and the lower surface of valve 5 respectively and make valve 5 be sealed in valve base 4 bottom, the joint ring 7 of external diameter and upper land 2 diameter compatible is had at the seat of honour, upper surface of valve base 4, jackscrew 8 is installed with in upper land 2 inner chamber above joint ring 7, the upper end of jackscrew 8 is not higher than the upper surface of upper land 2, the lower surface of jackscrew 8 and the upper surface of joint ring 7 offset, the lower surface of joint ring 7 and the upper surface of valve base 4 offset, the staving that junk basket 9 seals for lower end, the upper inside wall of junk basket 9 and the bottom outer wall of body 1 are fixedly installed togather, and the junk basket 9 below body 1 is evenly equipped with through hole 10.
the present invention is arranged on oil pipe column bottom, before entering well, first to carry out pressure testing and Leakage Test to the present invention entering well, guarantee qualified after can enter well, the present invention is when mounted, must not anti-loaded up and down, once after anti-loaded, valve of just not opening during gaslift operation operation, causes suppressing pump, vertical pressure sharply rises, and adds follow-up work amount; The Main Function of valve 5 is in lower Tubing During Running, and valve 5 is automatically closed under the effect of torsion spring 6, is equivalent to the effect of ball-and-seat; The Main Function of jackscrew 8 is used to fixing valve base 4 and joint ring 7, jackscrew 8 carries out dismounting by special dismantling device, the present invention can use special dismantling device to carry out changing and cleaning, through hole on junk basket 9 realizes oil pipe and is communicated with reservoir, junk basket 9 can prevent again center tapping pin 11 from falling into shaft bottom simultaneously, during use, under oil pipe after predetermined well depth, when needing gaslift operation, by ground, center tapping pin 11 is dropped in oil pipe, open valve 5, center tapping pin 11 carries through hole 10, realize being communicated with reservoir in oil pipe.Under insufficient balance well completion operation during completion tubular column, valve 5 of the present invention is closed automatically, prevent spray in oil pipe, effective guarantee time oil pipe well control safety, after arriving predetermined well depth under oil pipe, input center tapping pin 11, valve 5 unlatching under the exerting pressure of center tapping pin 11, realize being communicated with reservoir in oil pipe, the operations such as gaslift operation can be carried out, recover the oil the later stage, when needing to carry out fracturing work, only oil well pump need be tripped out, level pressure plug 12 is dropped into by oil pipe, the level pressure plug 12 dropped into is on the upper surface of upper land 2, then perforation through tubing is carried out, fracturing work, do not need again to play flowline, the present invention can realize oil pipe blowout under underbalance, gaslift is gone into operation, fracturing work one-trip string, save a lower tubular column time, improve production efficiency, center tapping pin 11 is evenly equipped with through hole 14, and when center tapping pin 11 is suppressed after to junk basket 9, the through hole on center pike pole 11 can more conveniently effectively make to be communicated with reservoir in oil pipe, sets up interface channel inside and outside oil pipe.The mounting means of torsion spring 6 is existing known technology, also can adopt existing other mounting meanss known.
according to actual needs, above-mentioned Multifunctional oil-pipe float collar can be made further optimization and/or improvements:
as shown in Figure 1, the upper surface of lower land 3 is up big and down small conical ring face, and the bottom of valve base 4 is the frustum matched with the conical ring face of lower land 3 upper surface.When valve base 4 is on the upper surface of lower land 3, the conical ring face of lower land 3 upper surface and the frustum of valve base 4 bottom match, and can provide and install stability and sealing preferably.
as shown in Figure 1, the upper surface of upper land 2 is up big and down small conical ring face.The bottom of level pressure plug 12 in the frustum matched with the conical ring face of upper land 2 upper surface, when after input level pressure plug 12, the frustum of level pressure plug 12 bottom can preferably seat on the upper surface of upper land 2, for perforating and fracturing operation provides reliable sealing.
as shown in Figure 1, between valve base 4 and upper land 2, be installed with sealing ring 13, between valve base 4 and valve 5, be installed with sealing ring 13.Sealing ring 13 can further for valve base 4 and body 1, provide reliable sealing between valve base 4 and valve 5, and avoid before opening valve 5, reservoir is to pressure release in oil pipe.
as shown in Figure 1, the upper inside wall of junk basket 9 and the bottom outer wall of body 1 are fixedly installed togather by screw thread, and internal thread is arranged at the top of body 1.Body 1 top is connected with the lower end of oil pipe by internal thread; Be threaded and facilitate installation and removal.
above technical characteristic constitutes most preferred embodiment of the present invention, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (9)
1. a Multifunctional oil-pipe float collar, is characterized in that comprising body, valve base, valve, torsion spring, joint ring, jackscrew and junk basket, the inwall of body is provided with upper land and lower land that internal diameter reduces successively from top to bottom, the valve base of external diameter and upper land diameter compatible is had at the seat of honour, upper surface of lower land, valve base is circular cylinder, the internal diameter of valve base is less than the internal diameter of lower land, the lower inner wall of valve base is up-small and down-big conical ring face, valve is up-small and down-big frustum, two torque arm of torsion spring are fixedly installed togather with the lower surface of valve base and the lower surface of valve respectively and make valve be sealed in valve base bottom, the joint ring of external diameter and upper land diameter compatible is had at the seat of honour, upper surface of valve base, jackscrew is installed with in upper land inner chamber above joint ring, the upper end of jackscrew is not higher than the upper surface of upper land, the lower surface of jackscrew and the upper surface of joint ring offset, the lower surface of joint ring and the upper surface of valve base offset, junk basket is the staving of lower end sealing, and the upper inside wall of junk basket and the bottom outer wall of body are fixedly installed togather, and the junk basket below body is evenly equipped with through hole.
2. Multifunctional oil-pipe float collar according to claim 1, is characterized in that the upper surface of lower land is up big and down small conical ring face, and the bottom of valve base is the frustum matched with the conical ring face of lower land upper surface.
3. Multifunctional oil-pipe float collar according to claim 1 and 2, is characterized in that the upper surface of land is up big and down small conical ring face.
4. Multifunctional oil-pipe float collar according to claim 1 and 2, is characterized in that being installed with sealing ring between valve base and upper land, between valve base and valve, is installed with sealing ring.
5. Multifunctional oil-pipe float collar according to claim 3, is characterized in that being installed with sealing ring between valve base and upper land, between valve base and valve, is installed with sealing ring.
6. Multifunctional oil-pipe float collar according to claim 1 and 2, it is characterized in that the upper inside wall of junk basket and the bottom outer wall of body are fixedly installed togather by screw thread, internal thread is arranged at the top of body.
7. Multifunctional oil-pipe float collar according to claim 3, it is characterized in that the upper inside wall of junk basket and the bottom outer wall of body are fixedly installed togather by screw thread, internal thread is arranged at the top of body.
8. Multifunctional oil-pipe float collar according to claim 4, it is characterized in that the upper inside wall of junk basket and the bottom outer wall of body are fixedly installed togather by screw thread, internal thread is arranged at the top of body.
9. Multifunctional oil-pipe float collar according to claim 5, it is characterized in that the upper inside wall of junk basket and the bottom outer wall of body are fixedly installed togather by screw thread, internal thread is arranged at the top of body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510877936.7A CN105370243A (en) | 2015-12-04 | 2015-12-04 | Multifunctional oil pipe float collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510877936.7A CN105370243A (en) | 2015-12-04 | 2015-12-04 | Multifunctional oil pipe float collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105370243A true CN105370243A (en) | 2016-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510877936.7A Pending CN105370243A (en) | 2015-12-04 | 2015-12-04 | Multifunctional oil pipe float collar |
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| CN (1) | CN105370243A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577912A (en) * | 2018-12-27 | 2019-04-05 | 中国石油集团西部钻探工程有限公司 | Jet-preventing tool and a formula underbalance combine oil production method in oil pipe under underbalance |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201306140Y (en) * | 2008-10-29 | 2009-09-09 | 西部钻探吐哈钻井工艺研究院 | Valve type float valve |
| CN102606108A (en) * | 2012-04-01 | 2012-07-25 | 中国石油集团西部钻探工程有限公司 | Pitching pressure-out opening oil tube constant-pressure floating valve |
| CN102606109A (en) * | 2012-04-01 | 2012-07-25 | 中国石油集团西部钻探工程有限公司 | Valve-type oil tube floating valve device |
| CN202596667U (en) * | 2012-05-03 | 2012-12-12 | 中国石油集团西部钻探工程有限公司 | Bypass type oil pipe floating valve |
| CN103470221A (en) * | 2013-09-22 | 2013-12-25 | 中国石油集团西部钻探工程有限公司 | Underbalance tubing, no-killing gas lifting, shaft pumping and pump detecting combined method |
| US20140251620A1 (en) * | 2013-03-07 | 2014-09-11 | Kevin R. George | Method and Apparatus for Establishing Injection into a Cased Bore Hole using a Time Delay Toe Injection Apparatus |
| CN205277368U (en) * | 2015-12-04 | 2016-06-01 | 中国石油集团西部钻探工程有限公司 | Multi -functional oil pipe float collar |
-
2015
- 2015-12-04 CN CN201510877936.7A patent/CN105370243A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201306140Y (en) * | 2008-10-29 | 2009-09-09 | 西部钻探吐哈钻井工艺研究院 | Valve type float valve |
| CN102606108A (en) * | 2012-04-01 | 2012-07-25 | 中国石油集团西部钻探工程有限公司 | Pitching pressure-out opening oil tube constant-pressure floating valve |
| CN102606109A (en) * | 2012-04-01 | 2012-07-25 | 中国石油集团西部钻探工程有限公司 | Valve-type oil tube floating valve device |
| CN202596667U (en) * | 2012-05-03 | 2012-12-12 | 中国石油集团西部钻探工程有限公司 | Bypass type oil pipe floating valve |
| US20140251620A1 (en) * | 2013-03-07 | 2014-09-11 | Kevin R. George | Method and Apparatus for Establishing Injection into a Cased Bore Hole using a Time Delay Toe Injection Apparatus |
| CN103470221A (en) * | 2013-09-22 | 2013-12-25 | 中国石油集团西部钻探工程有限公司 | Underbalance tubing, no-killing gas lifting, shaft pumping and pump detecting combined method |
| CN205277368U (en) * | 2015-12-04 | 2016-06-01 | 中国石油集团西部钻探工程有限公司 | Multi -functional oil pipe float collar |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577912A (en) * | 2018-12-27 | 2019-04-05 | 中国石油集团西部钻探工程有限公司 | Jet-preventing tool and a formula underbalance combine oil production method in oil pipe under underbalance |
| CN109577912B (en) * | 2018-12-27 | 2024-03-01 | 中国石油天然气集团有限公司 | Blowout prevention tool in underbalanced lower oil pipe and one-pass underbalanced combined oil extraction method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160302 |
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| RJ01 | Rejection of invention patent application after publication |