CN106930715B - Oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device and its application method - Google Patents
Oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device and its application method Download PDFInfo
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- CN106930715B CN106930715B CN201710339266.2A CN201710339266A CN106930715B CN 106930715 B CN106930715 B CN 106930715B CN 201710339266 A CN201710339266 A CN 201710339266A CN 106930715 B CN106930715 B CN 106930715B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
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- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
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Abstract
The present invention is that oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device and its application method, stratum progress nitrogen negative pressure can be returned and apply work, negative-pressure ward power is realized by release liquid nitrogen, reduces the density of well liquid in pit shaft, will take ground out of after the tamper suction in surrounding formations.The present invention includes fishing cap, it catches crown portion and is equipped with fishing upper bolt, upper pressure control solenoid valve and low pressure control solenoid valve are connected in the top liquid nitrogen storage chamber and lower part liquid nitrogen storage chamber of ontology, the both ends of ontology are separately connected fishing cap and lower endcaps, top pressure transmission hole and lower part pressure transmission hole are connected to top liquid nitrogen storage chamber and lower part liquid nitrogen storage chamber respectively；Liquid nitrogen filling quick coupling one and liquid nitrogen filling quick coupling two are connect with top liquid nitrogen storage chamber and lower part liquid nitrogen storage chamber respectively, and top injection discrimination hole and lower part injection discrimination hole are respectively equipped on fishing cap and lower endcaps.Present invention significantly reduces construction costs, improve construction effect.
Description
Technical field
It is negative that the present invention relates to the down-hole formation plug-removing device of petroleum industry oil-water well, especially oil-water well self-propelled nitrogen
The row's of returning casting and dragging free device and its application method are pressed, stratum progress nitrogen negative pressure can be returned and apply work, realized by release liquid nitrogen negative
Suction force is pressed, the density of well liquid in pit shaft is reduced, ground will be taken out of after the tamper suction in surrounding formations.
Background technique
With the development of landing ground and offshore oilfield oil and gas development technique, deep formation transformation work operations amount increases year by year,
It is one of common construction technology that nitrogen foam negative pressure, which returns row, its working principle is that: nitrogen is injected from casing annulus, with pressure liter
Height, annular space are constantly excluded with liquid in oil pipe, when annulus fluid is all discharged nitrogen, is reached pressure inflection point, are continued to inject
Nitrogen, due to being gas and liquid mixture in oil pipe, head of liquid is gradually decreased.Due to the reduction of pressure, occur during gaslift
Induced flow phenomenon can achieve preferable flowback effect.Suitable for oil-water well, for the pollution in drilling process, during operation
Gum asphalt organic deposition, calcium and magnesium salt inorganic scale and small bits of clay near perforation holes block caused by migrating, can be effective
Depollution and blocking are solved, nearly near wellbore percolation ability is improved and then improves grease well capacity.Nitrogen foam negative pressure returns drainage technique
It is used on land, needs vehicle to draw and carry the equipment of making nitrogen；At sea oil platform uses, because by platform base to orientation, ship anchor
The restriction of the factors such as point, tide meteorology, construction in summer process all effected.
A kind of oil-water well, which is disclosed, application No. is CN201520626108.1 returns heat-extraction system, including oil pipe, casing with negative pressure,
Oil pipe is placed in casing and has gap, and plugging device is arranged at oil pipe bottom, and the oil pipe on plugging device top is equipped with tap, point
It flows connector and is equipped with sieve, the oil pipe on sieve top is equipped with the packer for forming sealing structure with casing, packer top
Oil pipe is equipped with negative pressure and returns row's device.The beneficial effect is that: physics and chemical double action are carried out to stratum, thoroughly dredged before de-plugging
Secondary injury is eliminated, thus effective protection reservoir with the quick thorough row's of the returning blockages relieving fluid of negative pressure after de-plugging processing in stratum duct.But
It is to lead to long construction period due to generating negative pressure induced flow indirectly.If at sea oil platform uses, construction ship and oil are needed
Coordinative construction is taken turns, not only use cost is high, is also restricted by factors such as meteorology, sea situations, it is also difficult to implement.On the other hand, the negative pressure
The construction negative pressure value adjustment for returning heat-extraction system is difficult, be easy to cause negative pressure value excessive, causes near wellbore zone to spit sand serious, stratum sand body
The negative effect such as structure collapse.Therefore need to invent a kind of short construction period, reusable, low-cost nitrogen negative pressure is returned
Arranging device.
Summary of the invention
The object of the present invention is to provide oil-water well self-propelled nitrogen negative pressure to return row's casting and dragging free device and its application method, gram
It takes current stratum nitrogen negative pressure and returns row long construction period, at high cost and negative pressure and return row's value and set difficult bring negative effect,
It improves construction efficiency, reduce production cost, improve construction effect.
The technical solution of the invention is as follows:
It includes fishing cap that oil-water well self-propelled nitrogen negative pressure, which returns row's casting and dragging free device, and fishing crown portion, which is equipped with, catches upper anchor
Bar, upper pressure control solenoid valve and low pressure control solenoid valve are connected to top liquid nitrogen storage chamber and the lower part of ontology
In liquid nitrogen storage chamber, the both ends of ontology are separately connected fishing cap and lower endcaps, top pressure transmission hole and lower part pressure transmission hole respectively with it is upper
Portion's liquid nitrogen storage chamber is connected to lower part liquid nitrogen storage chamber；Liquid nitrogen fill quick coupling one and liquid nitrogen filling quick coupling two respectively with
Top liquid nitrogen storage chamber is connected with lower part liquid nitrogen storage chamber, and top injection discrimination hole is respectively equipped on fishing cap and lower endcaps under
Spray discrimination hole in portion.
Oil-water well self-propelled nitrogen negative pressure returns the application method of row's casting and dragging free device, is:
A, it according to hole deviation and the cracking pressure of wellbore trajectory setting upper pressure control solenoid valve, is constructed according to removal of bridge formation
The negative pressure of the setting present apparatus returns row's value and returns the unlatching pressure of row's value setting low pressure control solenoid valve according to the negative pressure of the present apparatus
Power；
B, cracking pressure required for controlling solenoid valve according to upper pressure fills liquid nitrogen, root in the liquid nitrogen storage chamber of top
Liquid nitrogen is filled in the liquid nitrogen storage chamber of lower part according to the cracking pressure of low pressure control solenoid valve；
C, the present apparatus is put into the blowout prevention standpipe connected on wax removal valve by the wax removal valve for closing construction well wellhead oil tree
In, keep fishing upper bolt upward；
D, wax removal valve is opened after catching device is installed in blowout prevention standpipe, the present apparatus falls into the oil pipe of construction well by self weight
In.
E, construction finishes, and after the present apparatus is captured by the catching device in blowout prevention standpipe, resets upper pressure and controls electromagnetism
The cracking pressure of valve 5 and low pressure control solenoid valve 10 fills liquid nitrogen on ground again, and the next nitrogen negative pressure of progress, which is returned, to be applied
Work.
Compared with prior art, remarkable result of the invention is: the present invention can lift liquid nitrogen container to operation platform, keep away
The use of coordinative construction ship is exempted from, the negative pressure value accurately generated to stratum overcomes and continuously constructs under terrible weather, reached and mentioned
High construction efficiency reduces production cost, improves the purpose of construction effect.Top injection discrimination hole of the invention is due to having centainly
Tilt angle, it is ensured that the present apparatus steady operation and generates maximum effective push in progradation, accelerates device under reaching
Submergence set by portion's electromagnetic pressure control valve shortens the single construction period.Constructed using the present apparatus, construction before only need by
Liquid nitrogen container is hoisted to the offshore oil platform of construction, and progress liquid nitrogen is filling, is not influenced, is greatly facilitated by extraneous weather environment
Offshore construction.According to the physical property of construction drain, the cracking pressure of low pressure control solenoid valve is adjusted, the present apparatus can be made in difference
Submergence open, the cracking pressure setting side of upper pressure control solenoid valve and low pressure control solenoid valve in the present apparatus
Just, the negative pressure value generated to stratum is accurately controlled.The present invention is without being connected to G.I.H in down-hole string, without on ground
Nitrogen gas generating device is installed in face, and catching device is installed in the blowout prevention standpipe that need to only connect on wellhead oil tree wax removal valve, incite somebody to action this
Can be after the completion of construction in invention investment oil pipe, auto-returned ground is captured by the catching device in blowout prevention standpipe.The present invention
The cracking pressure that row's value setting low pressure control solenoid valve can be returned according to detail design negative pressure, sets according to hole deviation and wellbore trajectory
Determine the cracking pressure of upper pressure control solenoid valve.The present invention will be in the liquid nitrogen storage chamber of lower part using low pressure control solenoid valve
Liquid nitrogen sprayed by lower part jetting manifold, reduce well liquid density after liquid nitrogen release, returning row's lifting force by negative pressure will
The present apparatus is lifted to well head, is captured by catching device, can repeatedly use behind ground again filling liquid nitrogen.The present invention has negative
The pressure row's of returning value setting is convenient, see liquid level after promote automatically, exempt from it is reusable, low in cost etc. after fishing, filling liquid nitrogen
Advantage, the investment for significantly reducing working procedure, reducing construction equipment eliminate current negative pressure and return the adjustment of heat-extraction system negative pressure value
Difficulty be easy to cause negative pressure value excessive, and causing near wellbore zone to be spat, sand is serious, and stratum sand body structure collapse etc. negatively affects, effectively
Improve using effect.Such as at sea oil platform is greatly facilitated using not restricted by platform, ship, meteorology factor
Offshore construction.In conclusion improving construction effect present invention significantly reduces construction cost, there is significant economic benefit
And social benefit.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
The present invention is described in detail below in conjunction with attached drawing, is not limited the scope of the invention, it is all to be thought using design of the invention
The improvement that rood goes out belongs to protection category of the invention.
It includes fishing cap that oil-water well self-propelled nitrogen negative pressure, which returns row's casting and dragging free device, and fishing crown portion, which is equipped with, catches upper anchor
Bar 2, upper pressure control solenoid valve 5 and low pressure control solenoid valve 10 are connected to the top liquid nitrogen storage chamber 6 of ontology 1
In lower part liquid nitrogen storage chamber 9, the both ends of ontology 1 are separately connected fishing cap and lower endcaps, top pressure transmission hole 4 and lower part pressure transmission hole
11 are connected to top liquid nitrogen storage chamber 6 and lower part liquid nitrogen storage chamber 9 respectively；Liquid nitrogen fills quick coupling 1 and liquid nitrogen filling is fast
Quick coupling 28 is connect with top liquid nitrogen storage chamber 6 and lower part liquid nitrogen storage chamber 9 respectively, is set respectively on fishing cap and lower endcaps
There are top injection discrimination hole 3 and lower part injection discrimination hole 12.
The middle part of the ontology 1, which is equipped with, is equipped with control valve erecting bed every platform, both ends, and the internal diameter every platform two sides is less than top liquid
The internal diameter of nitrogen storage chamber 6 and lower part liquid nitrogen storage chamber 9, liquid nitrogen fills quick coupling 1 and liquid nitrogen filling quick coupling 28 is distinguished
Be mounted on makes it generate outside jet power to 1 both ends of ontology every platform two sides.
The upper pressure control solenoid valve 5 and low pressure control solenoid valve 10 are mounted on top liquid nitrogen storage chamber backwards
6 and lower part liquid nitrogen storage chamber 9 in, top pressure transmission hole 4 and lower part pressure transmission hole 11 are separately positioned on upper pressure control 5 He of solenoid valve
Low pressure controls on the ontology 1 between solenoid valve 10 and control valve erecting bed, enables top pressure transmission hole 4 and lower part pressure transmission hole 11
Enough enter well liquid, measure submergence and pressure, upper pressure can be opened by pressure conduction and control solenoid valve 5 and low pressure
Control the pressure controller of solenoid valve 10.Upper pressure control solenoid valve 5 and low pressure control solenoid valve 10 are sold using market
The adjustable electromagnetic pressure control valve of the cracking pressure sold.
It is equipped with boosting chamber between the fishing cap and lower endcaps and control valve erecting bed at 1 both ends of ontology, produces the present apparatus
The raw bigger row's of returning lifting force.
Top injection discrimination hole 3 and lower part injection discrimination hole 12 at least provided with three, top injection discrimination hole 3 be inclined hole, with
The center line of ontology 1 is equipped between 10.8-11.5 degree and is inclined outwardly angle, can produce better jet power, and discrimination is sprayed in lower part
The centerline parallel in hole 12 and ontology 1.
Cracking pressure of the cracking pressure of the upper pressure control solenoid valve 5 lower than low pressure control solenoid valve 10.
Oil-water well self-propelled nitrogen negative pressure returns the application method of row's casting and dragging free device, is:
A, it according to hole deviation and the cracking pressure of wellbore trajectory setting upper pressure control solenoid valve 5, is applied according to removal of bridge formation
The negative pressure of the work setting present apparatus returns row's value and returns opening for row's value setting low pressure control solenoid valve 10 according to the negative pressure of the present apparatus
Open pressure；
B, cracking pressure required for controlling solenoid valve 5 according to upper pressure fills accordingly in top liquid nitrogen storage chamber 6
The liquid nitrogen of quantity fills respective numbers in lower part liquid nitrogen storage chamber 9 according to the cracking pressure that low pressure controls solenoid valve 10
Liquid nitrogen；
C, the present apparatus is put into the blowout prevention standpipe connected on wax removal valve by the wax removal valve for closing construction well wellhead oil tree
In, make to catch upper bolt 2 upwards；
D, wax removal valve is opened after catching device is installed in blowout prevention standpipe, the present apparatus falls into the oil pipe of construction well by self weight
In.
E, construction finishes, and after the present apparatus is captured by the catching device in blowout prevention standpipe, resets upper pressure and controls electromagnetism
The cracking pressure of valve 5 and low pressure control solenoid valve 10 fills liquid nitrogen on ground again, and the next nitrogen negative pressure of progress, which is returned, to be applied
Work.
When ontology 1 contacts liquid level, since the presence of well liquid mill resistance slows down the falling speed of the present apparatus, when ontology 1 sinks
Into liquid level, well liquid pressure is conducted by top pressure transmission hole 4 to top electromagnetic pressure control valve 5, when submergence pressure reaches
The cracking pressure of portion's electromagnetic pressure control valve 5, upper pressure control solenoid valve 5 and open.Liquid nitrogen in top liquid nitrogen storage chamber 6 is logical
The release of top jetting manifold 3 is crossed, liquid nitrogen discharges rapid spatial expansion, and boosting ontology 1 moves down its acceleration.Higher well liquid pressure
Power, which is conducted by lower part pressure transmission hole 11 to low pressure, controls solenoid valve 10, when submergence pressure reaches low pressure control electromagnetism
The cracking pressure of valve 10, low pressure control solenoid valve 10 and open, and the liquid nitrogen in lower part liquid nitrogen storage chamber 9 sprays discrimination by lower part
Pipe 12 discharges, and liquid nitrogen discharges rapid spatial expansion, makes the reduction of well liquid density.When well liquid head of liquid is lower than strata pressure, stratum
Liquid stream enters pit shaft, the liquid uplink in operating tool string, pushes the present apparatus with liquid in operating tool string to go upward to wellhead oil tree clear
In the blowout prevention standpipe connected on wax valve, it is stuck in the fishing upper bolt 2 of the present apparatus in catching device.Close the paraffin valve of production tree
Door removes catching device and takes out the present apparatus after blowout prevention standpipe pressure release, complete single nitrogen negative pressure and return row.Ontology 1 is cleaned, is filled again
Liquid nitrogen simultaneously sets the cracking pressure of upper pressure control solenoid valve 5 and the cracking pressure of low pressure control solenoid valve 10, carries out
Secondary nitrogen negative pressure returns row, and the present apparatus can repeatedly fill liquid nitrogen reuse.
The embodiment described above is only exemplary embodiments, but the present invention is not limited only to these embodiments, this field
Technical staff can make modification without departing from the spirit and inspiration of the present invention.There may be many for aspect disclosed herein
Change, combination and modification, and be within, therefore, protection scope is not limited only to explanation above.
Claims (7)
1. oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device, including fishing cap, fishing crown portion, which is equipped with, catches upper anchor
Bar, characterized in that upper pressure control solenoid valve and low pressure control solenoid valve are connected to the top liquid nitrogen of ontology and deposit
In storage chamber and lower part liquid nitrogen storage chamber, the both ends of ontology are separately connected fishing cap and lower endcaps, top pressure transmission hole and lower part pressure transmission
Hole is connected to top liquid nitrogen storage chamber and lower part liquid nitrogen storage chamber respectively；Liquid nitrogen fills quick coupling one and liquid nitrogen fills fast quick access
First two connect with top liquid nitrogen storage chamber and lower part liquid nitrogen storage chamber respectively, and top is respectively equipped on fishing cap and lower endcaps and is sprayed
Penetrate discrimination hole and lower part injection discrimination hole.
2. oil-water well self-propelled nitrogen negative pressure as described in claim 1 returns row's casting and dragging free device, characterized in that the ontology
Middle part be equipped with every platform, both ends be equipped with control valve erecting bed, every platform two sides internal diameter be less than top liquid nitrogen storage chamber and lower part liquid
The internal diameter of nitrogen storage chamber, liquid nitrogen filling quick coupling one and liquid nitrogen filling quick coupling two are separately mounted to every platform two sides.
3. oil-water well self-propelled nitrogen negative pressure as claimed in claim 2 returns row's casting and dragging free device, characterized in that the top
Electromagnetic pressure control valve and low pressure control solenoid valve are mounted on backwards in top liquid nitrogen storage chamber and lower part liquid nitrogen storage chamber,
Top pressure transmission hole and lower part pressure transmission hole are separately positioned on upper pressure control solenoid valve and low pressure control solenoid valve and control
On ontology between valve erecting bed.
4. oil-water well self-propelled nitrogen negative pressure as claimed in claim 2 returns row's casting and dragging free device, characterized in that the ontology
Boosting chamber is equipped between the fishing cap and lower endcaps and control valve erecting bed at both ends.
5. oil-water well self-propelled nitrogen negative pressure as claimed in claim 4 returns row's casting and dragging free device, characterized in that the top
Spray discrimination hole and lower part injection discrimination hole at least provided with three, top injection discrimination hole is inclined hole, is equipped with the center line of ontology
It is inclined outwardly angle between 10.8-11.5 degree, the centerline parallel in discrimination hole and ontology is sprayed in lower part.
6. oil-water well self-propelled nitrogen negative pressure as claimed in claim 3 returns row's casting and dragging free device, characterized in that the top
Cracking pressure of the cracking pressure of electromagnetic pressure control valve lower than low pressure control solenoid valve.
7. oil-water well self-propelled nitrogen negative pressure as described in claim 1 returns the application method of row's casting and dragging free device, it is:
A, it according to hole deviation and the cracking pressure of wellbore trajectory setting upper pressure control solenoid valve, is constructed and is set according to removal of bridge formation
The negative pressure of the present apparatus returns row's value and returns the cracking pressure of row's value setting low pressure control solenoid valve according to the negative pressure of the present apparatus；
B, cracking pressure required for controlling solenoid valve according to upper pressure fills liquid nitrogen in the liquid nitrogen storage chamber of top, under
The cracking pressure of portion's electromagnetic pressure control valve fills liquid nitrogen in the liquid nitrogen storage chamber of lower part；
C, the wax removal valve for closing construction well wellhead oil tree puts into the present apparatus in the blowout prevention standpipe connected on wax removal valve,
Keep fishing upper bolt upward；
D, wax removal valve is opened after catching device is installed in blowout prevention standpipe, the present apparatus is in the oil pipe that self weight falls into construction well；
E, construction finish, the present apparatus by blowout prevention standpipe catching device capture after, reset upper pressure control solenoid valve and
The cracking pressure of low pressure control solenoid valve fills liquid nitrogen on ground again, and the next nitrogen negative pressure of progress, which is returned, applies work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339266.2A CN106930715B (en) | 2017-05-15 | 2017-05-15 | Oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339266.2A CN106930715B (en) | 2017-05-15 | 2017-05-15 | Oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device and its application method |
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| Publication Number | Publication Date |
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| CN106930715A CN106930715A (en) | 2017-07-07 |
| CN106930715B true CN106930715B (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710339266.2A Active CN106930715B (en) | 2017-05-15 | 2017-05-15 | Oil-water well self-propelled nitrogen negative pressure returns row's casting and dragging free device and its application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109209305B (en) * | 2018-11-13 | 2023-10-13 | 中国石油化工股份有限公司 | Intelligent plunger drainage and production device for gas well and construction method |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2083628U (en) * | 1991-03-27 | 1991-08-28 | 玉门石油管理局石油沟油矿 | Energy-storage hydraulic pulse vibrator |
| GB9923200D0 (en) * | 1999-10-01 | 1999-12-01 | Andertech Limited | Fluid extraction |
| US6527050B1 (en) * | 2000-07-31 | 2003-03-04 | David Sask | Method and apparatus for formation damage removal |
| CN1190586C (en) * | 2002-09-13 | 2005-02-23 | 中国石化胜利油田有限公司采油工艺研究院 | Hydro-impact broken down method and device for oil-water well |
| CN2656624Y (en) * | 2003-10-13 | 2004-11-17 | 孙旭光 | Negative pressure swabbing device for oil well |
| CN200992988Y (en) * | 2006-12-18 | 2007-12-19 | 辽河石油勘探局 | Oil well forced-discharge negative-pressure blockage removing tool |
| CN201041023Y (en) * | 2007-05-29 | 2008-03-26 | 中国石油天然气股份有限公司 | Gas-liquid mixed injection method liquid level-lowering induced spraying construction device |
| CN101435327B (en) * | 2008-12-08 | 2010-12-22 | 辽河石油勘探局 | Uranium well air pumping dredge method |
| CN202689977U (en) * | 2012-05-10 | 2013-01-23 | 中国石油天然气股份有限公司 | Cavitation negative pressure flow-back device |
| CN103089203A (en) * | 2012-12-28 | 2013-05-08 | 西安通源石油科技股份有限公司 | Pressure relief device of dynamic negative pressure perforating operation |
| CN103821470B (en) * | 2014-03-19 | 2017-03-15 | 辽宁新科石油设备制造有限公司 | Oil well heat injection nitrogen technology for washing well method |
| CN104265250A (en) * | 2014-09-17 | 2015-01-07 | 中国海洋石油总公司 | Rapid induced flow completion pipe column for subsurface nitrogen making gas well |
| CN204877385U (en) * | 2015-08-19 | 2015-12-16 | 陕西兴油科技开发有限公司 | Stifled system is separated to oil -water well forced -ventilated negative pressure |
| CN204827391U (en) * | 2015-08-19 | 2015-12-02 | 陕西兴油科技开发有限公司 | Heat -extraction system is returned to negative pressure for oil -water well |
| CN206071538U (en) * | 2016-05-12 | 2017-04-05 | 山东科瑞石油工程技术研究院 | A kind of wax card well nitrogen speed hot fluid is excused from a college course well unfreezing system |
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