CN104563947B - A kind of oil well blowout prevention tubing string - Google Patents
A kind of oil well blowout prevention tubing string Download PDFInfo
- Publication number
- CN104563947B CN104563947B CN201410797619.XA CN201410797619A CN104563947B CN 104563947 B CN104563947 B CN 104563947B CN 201410797619 A CN201410797619 A CN 201410797619A CN 104563947 B CN104563947 B CN 104563947B
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- Prior art keywords
- rotating plate
- single current
- well
- string
- oil
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
Abstract
The present invention relates to well construction field, particularly it is a kind of made a trip for oil well during prevent the tubing string of well wellbore blowout.The rotating plate switch of this oil well blowout prevention tubing string is connected to hold-down packer lower end, by being set under flow string to precalculated position, then single current sealing intubation is connected under the lower going-into-well of flow string lower end, single current sealing intubation is plugged in rotating plate switch, rotating plate switch is driven on top, and oil well is normally produced；When carrying out underground work, act flow string, single current sealing intubation is above carried, and rotating plate switch is closed, and realizes well wellbore blowout prevention effect, and hanging packer top pit shaft separates with oil-gas Layer, effectively prevents blowout.
Description
Technical field
The present invention relates to well construction field, particularly one kind prevents well wellbore blowout during being made a trip for oil well
Tubing string.
Background technology
At present, it is higher for part oil field Triassic system oil reservoir block oil-gas ratio, at present pull out of hole when oil pipe can not blowout prevention, need to put
Operation, influence oil well operation timeliness and oil well output could be carried out after spray, and there is certain safety and environmental protection hidden danger.Generally adopt at present
With a kind of blowout control drip, the bleeder is connected on conventional tube pump standing valve upper end, and in lower Tubing During Running, bleeder is in
Closed mode, can prevent hydrocarbon stratum and be sprayed from oil pipe.Under in place after, using plunger depression bleeder, be at oil pipe
Interior connected state, you can produced with just normally opened pumping.When having needed oil pipe again, act sucker rod and pump plunger, put into out of oil pipe
Pup joint of sucker rod, by hitting, coupling cock inside and outside bleeder is severed, UNICOM inside and outside bleeder is realized（With oil jacket ring in oil pipe
It is empty）, you can when playing oil pipe, realize draining.The use of the type preventer, can effectively be solved anti-during tubing string tripping in
Spray problem, but during oil pipe rises, because bleeder has been opened, above and below in oil pipe, with all realizing connection inside and outside oil pipe
It is logical, it is impossible to play blowout prevention effect.But high gas-oil ratio (HGOR) well is in construction operation, as tubing string rises, pit shaft fluid column declines, and can lead
Crude oil deaeration is caused, of short duration oil gas occurs and sprays, there is construction safety hidden danger.
The content of the invention
The purpose of the present invention is that, for the high oil well of Triassic system block oil-gas ratio, oil pipe can not blowout prevention, need when pulling out of hole at present
It could carry out operation after open flow, influence oil well operation timeliness and oil well output, and the problem of there is certain safety and environmental protection hidden danger, this
Invention provides a kind of oil well blowout prevention tubing string, and asking for high oil-gas ratio well wellbore hydrojet is prevented in trip-out and going down process
Topic, it is ensured that safety, it is ensured that oil well operation timeliness.
The present invention solve its technical problem use technical scheme be：A kind of oil well blowout prevention tubing string, it is by giving up
Tubing string is constituted twice for tubing string and flow string, it is characterized in that：It is rotating plate switch above Back-off Pipe String, is single current below flow string
Sealing intubation, single current sealing intubation is plugged in rotating plate switch.
Described Back-off Pipe String also includes back-off sub, hold-down packer, communicating valve and mother and blocked up, wherein Back-off Pipe String
Upper end is to be connected to rotating plate through hold-down packer below back-off sub, back-off sub to switch, and rotating plate switch lower section is through communicating valve
It is connected to female stifled.
Described back-off sub is ball-throwing type safety joint.
Described flow string also includes oil well pump and screen casing, and oil well pump connects screen casing through oil pipe, and the connection of screen casing lower end is single
Stream sealing intubation.
The top of described single current sealing intubation is the top connection for being connected with screen casing bottom, the bottom of single current sealing intubation
Portion is the water conservancy diversion push rod that rotating plate switch is driven for pushing up, and the lower section of top connection has been sequentially arranged ball-and-seat and well-flushing protection skin respectively
It is intubated below bowl, well-flushing protection leather cup to the single current sealing above water conservancy diversion push rod on tube wall and is provided with UNICOM tube wall Wai Zhiguannei centers
The pod apertures of passage.
Described ball-and-seat includes central passage top in single current valve bonnet, valve ball, valve seat, the pipe of single current sealing intubation and set
Have and single current valve bonnet is fixed with valve seat, valve seat, single current valve bonnet is built-in with valve ball.
Described well-flushing protection leather cup includes cup packer, leather cup central tube and leather cup support base, leather cup center pipe sleeve
Single current sealing cannula outer wall is connected on, leather cup central tube fixes cup packer by leather cup support base.
Described rotating plate switch is mainly made up of rotating plate switching mechanism and Compulsory reduction mechanism,
Wherein rotating plate switching mechanism includes top connection, fixing key seat, rotary shaft, rotating plate, and top connection bottom is fixed with fixation
Key seat, rotating plate is connected on fixing key seat bottom by rotating axle pin, and the size of rotating plate is more than top connection bottom port；
Compulsory reduction mechanism includes push rod, overcoat, forced resetting spring, lower contact, and push rod one end passes through bearing pin with rotating plate
Be hinged, the push rod other end is fixed on forced resetting spring top, forced resetting spring bottom is fixed in lower contact, lower contact with
Overcoat is also associated between top connection.
Hold-down packer lower end is connected to the beneficial effects of the invention are as follows the rotating plate of this oil well blowout prevention tubing string switch,
By being set under flow string to precalculated position, then single current sealing intubation is connected under the lower going-into-well of flow string lower end, it is single
Stream sealing intubation is plugged in rotating plate switch, and rotating plate switch is driven on top, and oil well is normally produced；When carrying out underground work, act production
Tubing string, single current sealing intubation is above carried, and rotating plate switch is closed, and realizes well wellbore blowout prevention effect, hanging packer top pit shaft with
Oil-gas Layer separates, and effectively prevents blowout.
Brief description of the drawings
With reference to embodiment accompanying drawing, the present invention is further described.
Fig. 1 is Underwell anti-injection tubing string schematic diagram；
Fig. 2 is single current sealing cannula structures figure；
Fig. 3 is rotating plate construction of switch figure；
In figure：1st, oil well pump；2nd, screen casing；3rd, single current sealing intubation；4th, back-off sub；5th, hold-down packer；6th, rotating plate
Switch；7th, communicating valve；8th, it is female stifled;
3-1, top connection；3-2, single current valve bonnet；3-3, valve ball；3-4, valve seat；3-5, cup packer；3-6, leather cup center
Pipe；3-7, leather cup support base；3-8, pod apertures；3-9, water conservancy diversion push rod；
6-1, top connection；6-2, fixing key seat；6-3, rotary shaft；6-4, rotating plate；6-5, push rod；6-6, overcoat；It is 6-7, strong
Back-moving spring processed；6-8, lower contact.
Embodiment
Embodiment 1
As shown in Fig. 1 oil well blowout prevention tubular column structure schematic diagram of the present invention, this blowout prevention tubing string be by Back-off Pipe String and
Tubing string is constituted flow string twice, is rotating plate switch 6 above Back-off Pipe String, is single current sealing intubation 3, single current below flow string
Sealing intubation 3 is plugged in rotating plate switch 6.
Back-off Pipe String also includes back-off sub 4, hold-down packer 5, communicating valve 7 and female stifled 8, wherein on Back-off Pipe String
Hold as back-off sub 4, back-off sub 4 is ball-throwing type safety joint, the lower section of back-off sub 4 is connected through hold-down packer 5
To rotating plate switch 6, the lower section of rotating plate switch 6 is connected to female stifled 8 through communicating valve 7.
Flow string also includes oil well pump 1 and screen casing 2, and oil well pump 1 connects screen casing 2, the lower end of screen casing 2 connection single current through oil pipe
Sealing intubation 3.
In this blowout prevention tubing string in addition to single current sealing intubation 3 and rotating plate switch 6 structures, other structures are existing mature technology
Or matured product, such as screen casing 2, ball-throwing type safety joint 4, hold-down packer 5, communicating valve 7, female stifled 8, its structure is herein
It is not explained in detail.
Oil well blowout-prevention tubing string workflow is：Rotating plate switch 6 is connected to the lower end of hold-down packer 5, passes through flow string
Under set to precalculated position, then single current sealing intubation 3 is connected under the lower going-into-well of flow string lower end, single current sealing intubation 3
It is plugged in rotating plate switch 6, rotating plate switch 6 is driven on top, and oil well is normally produced；When carrying out underground work, act flow string, single current
Sealing intubation 3 is above carried, and rotating plate switch 6 is closed, and realizes well wellbore blowout prevention effect, the top pit shaft of hanging packer 5 and oil-gas Layer
Separate, effectively prevent blowout.
Specific construction field case：
Test well GuXX-XXJing, which is bored, meets layer bit length X, finishing drilling well depth 1406.0m, artificial bottom of a well 1397.5m, is produced daily before operation
Liquid 4.62m3,Day oil-producing 4.11t, moisture content 11.0%, gas-oil ratio 86.5m3/t。
1st, lower packet, which is set, gives up：
Oil well blowout-prevention tubing string connection flow string is gone into the well to precalculated position（1213.5m）, from oil pipe according to 5-10-15
MPa ladders are suppressed, and during which each voltage stabilizing 5min, is suppressed by oil pipe and set, after the completion of instrument is set, slow test oil pipe, oil
Pipe depth is constant, and deadweight reduces 1-2t, and instrument sets completion；Then pup joint of sucker rod is put into from oil pipe, ball-throwing type is lost safely
Hand joint is knocked, completion of giving up, and acts ball-throwing type safety joint above tubing string.
2nd, tripping in flow string and sealing intubation：
Single current sealing intubation is connected to oil well pump afterbody, tubing string is combined as from top to bottom：φ 73mm oil pipes+tubing pump+φ
73mm oil pipes+screen casing 2+ single currents sealing intubation 3.Precalculated position is arrived under depth according to plan, instrument（1213.5m）, slowly descend oil drilling
Pipe, tubing depth is constant, and deadweight reduces 10-30kN, and then tubing string load restoration is normal, continues to transfer tubing string, deadweight is reduced
30kN, tubing string is no longer descending, and the decentralization of single current sealing intubation 3 in place, open by rotating plate switch 6.
3rd, the reliability of checking rotating plate switch
Above carry opening after flow string 0.3m, completion and take out, oil well does not go out liquid for 12 hours, rotating plate is switched on successfully packing packer
Portion's pit shaft and oil-gas Layer, produce a desired effect.
4th, completion
By predetermined design tripping in sucker rod and plunger, completion, 2 hour oil well liquid outputs after driving a well.
Embodiment 2
As Fig. 2 single current sealing cannula structures schematic diagram shown in, single current sealing intubation 3 top be for the bottom of screen casing 2
The top connection 3-1 of portion's connection, the bottom of single current sealing intubation 3 is the water conservancy diversion push rod 3-9 that rotating plate switch 6 is driven for pushing up, top connection
3-1 lower section has been sequentially arranged below ball-and-seat and well-flushing protection leather cup, well-flushing protection leather cup to above water conservancy diversion push rod 3-9 respectively
Single current sealing intubation 3 tube walls on be provided with outside UNICOM's tube wall to manage in central passage pod apertures 3-8.
The operation principle of single current sealing intubation：Single current sealing intubation 3 is connected to flow string lowermost, and single current is sealed and inserted
In the water conservancy diversion push rod 3-9 insertion rotating plates switch 6 of the bottom of pipe 3, rotating plate 6-4 is opened on top during rotating plate is switched, and makes single current sealing intubation 3
Connected with oil reservoir, while the pod apertures 3-8 that liquid is sealed by single current in intubation in pit shaft leads at center in single current sealing intubation 3
Enter hanging packer top oil sets annular space through ball-and-seat behind road.
Ball-and-seat includes central passage top in single current valve bonnet 3-2, valve ball 3-3, valve seat 3-4, the pipe of single current sealing intubation 3
It is provided with valve seat 3-4, valve seat 3-4 and is fixed with single current valve bonnet 3-2, single current valve bonnet 3-2 is built-in with valve ball 3-3, single current sealing is inserted
Valve ball 3-3 in pipe 3 on the liquid top valve opening seat 3-4 of central passage enters upper space.
Well-flushing protection leather cup includes cup packer 3-5, leather cup central tube 3-6 and leather cup support base 3-7, leather cup central tube
3-6 is socketed in single current sealing 3 outer walls of intubation, and leather cup central tube 3-6 fixes cup packer 3-5, single current by leather cup support base 3-7
After sealing intubation 3 is plugged in rotating plate switch 6, cup packer 3-5 switchs 6 central channel sections by being interference fitted with rotating plate
To sealing function, during well-flushing, flushing fluid can not be switched 6 gaps with rotating plate by single current sealing intubation 3 in oil pipe and pollute stratum,
Protecting both leather cups to be combined by ball-and-seat and well-flushing effectively prevents flushing fluid from pouring in down a chimney into stratum.
Embodiment 3
Rotating plate such as Fig. 3 is switched shown in 6 structural representations, and rotating plate switch 6 is main by rotating plate switching mechanism and forced resetting
Mechanism is constituted.
Wherein rotating plate switching mechanism includes top connection 6-1, fixing key seat 6-2, rotary shaft 6-3, rotating plate 6-4, top connection 6-1
Bottom is fixed with fixing key seat 6-2, and rotating plate 6-4, in fixing key seat 6-2 bottoms, enables rotating plate 6-4 by rotary shaft 6-3 pin joints
Using rotary shaft 6-3 as pivoted downward, rotating plate 6-4 size is more than top connection 6-1 bottom ports so that rotating plate 6-4 rotates
To top connection 6-1 bottom port can be blocked during upper end.
Compulsory reduction mechanism includes push rod 6-5, overcoat 6-6, forced resetting spring 6-7, lower contact 6-8, push rod 6-5 one end
With rotating plate 6-4 by hinge, the push rod 6-5 other ends are fixed on forced resetting spring 6-7 tops, forced resetting spring 6-7
Bottom is fixed on lower contact 6-8, and overcoat 6-6, forced resetting spring 6-7 are also associated between lower contact 6-8 and top connection 6-1
It can be compressed in the cavity that overcoat 6-6 is surrounded.
The operation principle of rotating plate switch 6：Rotating plate switch 6 is connected to the lower end of hanging packer 5, single current by top connection 6-1
Sealing intubation 3 bottoms water conservancy diversion push rod 3-9 insertion rotating plate switch 6 in, during rotating plate is switched rotating plate 6-4 top open, rotating plate 6-4 by
Water conservancy diversion push rod 3-9 thrust, rotating plate 6-4 is moved downward using rotary shaft 6-3 as axle center, and promotes push rod 6-5 to compress forced resetting
Spring 6-7 shrinks, and the pod apertures 3-8 sealed by single current in intubation 3 connects oil reservoir；When lifting in single current sealing intubation 3,
Forced resetting spring 6-7 promotes push rod 6-5 rotating plate is switched the rotating plate 6-4 resets in 6 by the elastic force of spring, rotating plate is switched 6
It is closed.
Claims (1)
1. a kind of oil well blowout prevention tubing string, by Back-off Pipe String and flow string, tubing string is constituted twice for it, it is characterized in that：Give up
It is rotating plate switch above tubing string（6）, flow string lower section seals intubation for single current（3）, single current sealing intubation（3）It is plugged on rotating plate
Switch（6）It is interior；Described Back-off Pipe String also includes back-off sub（4）, hold-down packer（5）, communicating valve（7）And it is female stifled
（8）, wherein Back-off Pipe String upper end is back-off sub（4）, back-off sub（4）Lower section is through hold-down packer（5）It is connected to rotating plate
Switch（6）, rotating plate switch（6）Lower section is through communicating valve（7）It is connected to female stifled（8）；Described single current sealing intubation（3）Top be
For with screen casing（2）The top connection of bottom connection（3-1）, single current sealing intubation（3）Bottom be for push up open rotating plate switch（6）
Water conservancy diversion push rod（3-9）, top connection（3-1）Lower section be sequentially arranged respectively ball-and-seat and well-flushing protection leather cup, well-flushing protection
To water conservancy diversion push rod below leather cup（3-9）The single current sealing intubation of top（3）UNICOM tube wall Wai Zhiguannei centers are provided with tube wall to lead to
The pod apertures in road（3-8）；Described ball-and-seat includes single current valve bonnet（3-2）, valve ball（3-3）, valve seat（3-4）, single current, which is sealed, to be inserted
Pipe（3）Pipe in central passage top be provided with valve seat（3-4）, valve seat（3-4）On be fixed with single current valve bonnet（3-2）, ball-and-seat
Cover（3-2）It is built-in with valve ball（3-3）；Described well-flushing protection leather cup includes cup packer（3-5）, leather cup central tube（3-6）With
And leather cup support base（3-7）, leather cup central tube（3-6）It is socketed in single current sealing intubation（3）Outer wall, leather cup central tube（3-6）It is logical
Cross leather cup support base（3-7）Fixed cup packer（3-5）；Described back-off sub（4）It is ball-throwing type safety joint；It is described
Flow string also include oil well pump（1）And screen casing（2）, oil well pump（1）Screen casing is connected through oil pipe（2）, screen casing（2）Lower end is connected
Single current sealing intubation（3）；Described rotating plate switch（6）Mainly it is made up of rotating plate switching mechanism and Compulsory reduction mechanism, wherein revolving
Switching plate mechanism includes top connection（6-1）, fixing key seat（6-2）, rotary shaft（6-3）, rotating plate（6-4）, top connection（6-1）Bottom
It is fixed with fixing key seat（6-2）, rotating plate（6-4）Pass through rotary shaft（6-3）Pin joint is in fixing key seat（6-2）Bottom, rotating plate（6-4）
Size be more than top connection（6-1）Bottom port；Compulsory reduction mechanism includes push rod（6-5）, overcoat（6-6）, forced resetting bullet
Spring（6-7）, lower contact（6-8）, push rod（6-5）One end and rotating plate（6-4）Pass through hinge, push rod（6-5）The other end is fixed
In forced resetting spring（6-7）Top, forced resetting spring（6-7）Bottom is fixed on lower contact（6-8）On, lower contact（6-8）
With top connection（6-1）Between be also associated with overcoat（6-6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410797619.XA CN104563947B (en) | 2014-12-22 | 2014-12-22 | A kind of oil well blowout prevention tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410797619.XA CN104563947B (en) | 2014-12-22 | 2014-12-22 | A kind of oil well blowout prevention tubing string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104563947A CN104563947A (en) | 2015-04-29 |
| CN104563947B true CN104563947B (en) | 2017-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410797619.XA Active CN104563947B (en) | 2014-12-22 | 2014-12-22 | A kind of oil well blowout prevention tubing string |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401527B (en) * | 2016-09-28 | 2019-01-18 | 中国石油天然气股份有限公司 | Well-flushing misses control device |
| CN106522867B (en) * | 2017-01-17 | 2018-11-20 | 中石化石油工程技术服务有限公司 | A kind of trip-out of satellite positioning control is anti-to return spray mud device |
| CN110984901B (en) * | 2019-11-06 | 2021-10-15 | 大庆油田有限责任公司 | Blowout prevention packer for quick pumping down and well completion after fracturing |
| CN111441737B (en) * | 2020-04-15 | 2022-02-01 | 青岛理工大学 | Double-rotary-barrel double-plunger sliding key type shaft-plug core three-in-one blowout preventer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8528641B2 (en) * | 2009-09-03 | 2013-09-10 | Baker Hughes Incorporated | Fracturing and gravel packing tool with anti-swabbing feature |
| CN201794563U (en) * | 2010-07-29 | 2011-04-13 | 大庆油田有限责任公司 | Selective production string optionally adjustable within four layers |
| CN201874524U (en) * | 2010-12-01 | 2011-06-22 | 冯新永 | Wellhead check valve for water injection well |
| CN202493239U (en) * | 2011-09-09 | 2012-10-17 | 中国石油天然气股份有限公司 | Blowout preventer |
| CN204002695U (en) * | 2014-07-09 | 2014-12-10 | 中国海洋石油总公司 | Down-hole rotating plate switching device |
| CN204703836U (en) * | 2014-12-22 | 2015-10-14 | 中国石油天然气股份有限公司 | A kind of oil well blowout prevention tubing string |
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2014
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| CN104563947A (en) | 2015-04-29 |
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