CN103470222B - Under insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do - Google Patents
Under insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do Download PDFInfo
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- CN103470222B CN103470222B CN201310431641.8A CN201310431641A CN103470222B CN 103470222 B CN103470222 B CN 103470222B CN 201310431641 A CN201310431641 A CN 201310431641A CN 103470222 B CN103470222 B CN 103470222B
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Abstract
<b> the present invention relates to </b><bGreatT.Gre aT.GT underbalance complete </b><bGreatT.Gre aT.GT well operations and oil producing operation </b><bGreatT.Gre aT.GT technical field, that under a kind of insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do, carry out as follows: the first step, sequentially blowout hookup and hand basket in oil pipe is fixedly mounted from top to bottom in the bottom of tubing string, in oil pipe, blowout hookup internal fixtion installs valve holder, in valve holder, valve is installed, the reverse gas lift valve of one is no less than in the fixed installation of the middle part of tubing string, the upper end of sleeve pipe is fixed on well head.The present invention is by blowout hookup in the bottom of tubing string fixed installation oil pipe, lower oil pipe operation can not only be completed smoothly at completion phase, and in gas-lift production process, gas lift liquid drainage can be set up or produce passage, gas-lift production operation is carried out smoothly, shorten duty cycle, the reservoir protection effect of strengthening </b><bGreatT.Gre aT.GT underbalance </b><bGreatT.Gre aT.GT drilling well, Oil/gas Well can be gone into operation in time, good production capacity is kept to promote effect, and then improve Unbalance technique competitiveness </b><bGreatT.Gre aT.GT.</b>
Description
Technical field
the present invention relates to insufficient balance well completion operation and oil producing operation technical field, is that under a kind of insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do.
Background technology
the well that current employing Unbalance technique bores is under completion phase during oil pipe, and generally install oil line check valve constant pressure valve in the bottom of tubing string, be used for preventing in the process of lower oil pipe, borehole fluid sprays from oil pipe.In the appropriate location of tubing string, reverse gas lift valve is installed, after tubing string is setting, direct circulation build the pressure open oil pipe internal channel realize oil jacket be communicated with, set up gas lift liquid drainage or produce passage.In real process, there is circulation blind area in existing apparatus in application process.Under be drilled into certain well depth after, owing to there is pressure reduction inside and outside the oil pipe at the reverse gas lift valve place of oil pipe, and after pressure reduction reaches certain value, gas lift valve is opened, now, mud in oil jacket annular space enters in oil pipe by the reverse gas lift valve opened, simultaneously, ground grouting system also pours into mud in oil pipe, from in the mud of two aspects all containing solid phase particles, solid phase particles constantly sinks in oil pipe, and deposit at the spool place of oil line check valve constant pressure valve, along with the increase of head of liquid, the continuous compacting of solid phase particles, final formation sand bridge plug, when suppressing in the setting backward oil pipe of oil pipe, pressure can only be passed on sand bridge stopper, cause the spool of oil line check valve constant pressure valve cannot be opened owing to failing to receive pressure, therefore cause gas lift liquid drainage or produce passage not smooth.In addition; structure and the matched process technology of existing balance well completion oil tube column be single, move on to that technological process is loaded down with trivial details, auxiliary equipment shortcoming; cause lifting duty cycle thus; the completion phase activity duration is long; weaken the reservoir protection effect of under balance pressure drilling significantly; cause go into operation delayed and production capacity of Oil/gas Well to promote the harmful effects such as poor effect, and then have impact on Unbalance technique competitiveness.
Summary of the invention
the invention provides oil pipe and gaslift under a kind of insufficient balance well completion to go into operation the method joining and do; overcome the deficiency of above-mentioned prior art, its effectively can solve the gas lift liquid drainage that exists in gas-lift production process or produce that passage is not smooth, the reservoir protection effect of lifting duty cycle and under balance pressure drilling is by the problem significantly weakened.
technical scheme of the present invention is realized by following measures: under a kind of insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do, carry out as follows: the first step, blowout hookup and hand basket in oil pipe is sequentially installed with from top to bottom in the bottom of tubing string, in oil pipe, blowout hookup internal fixtion installs valve holder, in valve holder, valve is installed, the reverse gas lift valve of one is no less than in the fixed installation of the middle part of tubing string, the upper end of sleeve pipe is fixed on well head, oil recovery four-way is fixedly mounted on the sleeve pipe above well head, wherein: the head of liquid starting pressure of reverse gas lift valve being set greater than lower going-into-well section, second step, to enter under tubing string in sleeve pipe, then the upper end base of tubing string is hung in oil recovery four-way, finally by setting for production tree on oil recovery four-way, wherein: under in the process that enters, open the valve in oil pipe on blowout hookup, to under the tubing string entered to different well section carry out direct circulation operation, when direct circulation operation each time starts, valve in oil pipe on blowout hookup is opened automatically, after the direct circulation end of job each time, valve is closed automatically, under control the pressure between sleeve pipe and tubing string by rotating blowout preventer in the process that enters, 3rd step, promotes the valve holder in interior blowout hookup downwards and falls into in hand basket, by the through hole on hand basket, tubing string being communicated with in well, sets up and produces passage, 4th step, injects lifting gas to the annular space between tubing string and sleeve pipe, and lifting gas will return out fluids in series by the through hole on hand basket, tubing string, oil recovery four-way and production tree gaslift to ground in well.
here is the further optimization and/or improvements to foregoing invention technical scheme:
in above-mentioned oil pipe, blowout hookup can be shutter-type oil pipe float valve device, valve holder is valve valve seat, valve is arranged in valve valve seat by torsion spring, in the third step, drop into tapping pin by production tree in oil pipe, tapping pin pushes away under the valve valve seat in shutter-type oil pipe float valve device, valve valve seat and valve fall in hand basket in the lump, by the through hole on hand basket, tubing string is communicated with in well, tubing string is communicated with in well, set up and produce passage.
in above-mentioned oil pipe, blowout hookup can be pitching and to build the pressure opening type oil pipe level pressure float valve, valve holder is spool, valve is arranged on spool, in the third step, build the pressure in opening type oil pipe level pressure float valve to pitching and drop into pressure ball of spraining, the ball sealing that builds the pressure blocks up the spool flow-guiding channel that pitching builds the pressure in opening type oil pipe level pressure float valve, in oil pipe, inject working fluid by production tree to build the pressure, valve on the spool of the opening type oil pipe level pressure that pitching built the pressure float valve and spool is delivered in hand basket together, by the through hole on hand basket, tubing string is communicated with in well, set up and produce passage.
above-mentioned working fluid can be water or oily or mud.
in above-mentioned 4th step, production tree can fixedly mount reclaimer by surface line, return out fluid recovery in reclaimer.
in above-mentioned 4th step, before injecting lifting gas to the annular space between tubing string and sleeve pipe, the displacement fluid of density lower than the original fluid in down-hole is pumped into direct circulation in tubing string, from the original fluid recovery in the down-hole displaced in well to reclaimer by production tree.
above-mentioned lifting gas can be natural gas or nitrogen or carbon dioxide.
the present invention is by blowout hookup in the bottom of tubing string fixed installation oil pipe; lower oil pipe operation can not only be completed smoothly at completion phase; and in gas-lift production process; gas lift liquid drainage can be set up or produce passage; gas-lift production operation is carried out smoothly, shortens duty cycle, the reservoir protection effect of strengthening under balance pressure drilling; Oil/gas Well can be gone into operation in time, keep good production capacity to promote effect, and then improves Unbalance technique competitiveness.
Accompanying drawing explanation
accompanying drawing 1 is main TV structure simplified schematic diagram of the present invention.
coding in accompanying drawing is respectively: 1 is tubing string, and 2 is blowout hookup in oil pipe, and 3 is hand basket, and 4 is reverse gas lift valve, and 5 is sleeve pipe, and 6 is oil recovery four-way, and 7 is production tree, and 8 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 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 in an embodiment, 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, the invention will be further described:
embodiment 1: under this insufficient balance well completion, oil pipe and gaslift are gone into operation and joined the method done and carry out as follows: the first step, sequentially blowout hookup 2 and hand basket 3 in oil pipe is fixedly mounted from top to bottom in the bottom of tubing string 1, in oil pipe, blowout hookup 2 internal fixtion installs valve holder, in valve holder, valve is installed, the reverse gas lift valve 4 of one is no less than in the fixed installation of the middle part of tubing string 1, the upper end of sleeve pipe 5 is fixed on well head, oil recovery four-way 6 is fixedly mounted on the sleeve pipe 5 above well head, wherein: the head of liquid starting pressure of reverse gas lift valve 4 being set greater than predetermined lower going-into-well section, second step, tubing string is entered for 1 time in sleeve pipe 5, then the upper end base of tubing string 1 is hung in oil recovery four-way 6, finally by setting for production tree 7 on oil recovery four-way 6, wherein: under in the process that enters, open the valve on blowout hookup 2 in oil pipe, to under the tubing string 1 entered to different well section carry out direct circulation operation, when direct circulation operation each time starts, valve in oil pipe on blowout hookup 2 is opened automatically, after the direct circulation end of job each time, valve is closed automatically, under control the pressure between sleeve pipe 5 and tubing string 1 by rotating blowout preventer in the process that enters, 3rd step, promotes the valve holder in interior blowout hookup 2 downwards and falls into in hand basket 3, by the through hole 8 on hand basket 3, tubing string 1 being communicated with in well, sets up and produces passage, 4th step, injects lifting gas to the annular space between tubing string 1 and sleeve pipe 5, and lifting gas will return out fluids in series by the through hole 8 on hand basket 3, valve, tubing string 1, oil recovery four-way 6 and production tree 7 gaslift to ground in well.In tubing string 1, oil pipe, blowout hookup 2, hand basket 3, oppositely gas lift valve 4, oil recovery four-way 6 and production tree 7 are existing known technology.The setting of reverse gas lift valve 4 starting pressure can prevent tubing string 1 under in the process that enters, reverse gas lift valve 4 is opened under the effect of well section head of liquid, under in the process that enters, to under the tubing string 1 entered to different well section carry out direct circulation operation and can the solid phase particles be deposited in oil pipe on blowout hookup 2 be discharged outside tubing string 1 by valve, can prevent the over-deposit of solid phase particles from forming sand bridge plug, the valve holder causing blowout hookup 2 in oil pipe after tubing string enters for 1 time is avoided to cut off, thus successfully set up gas lift liquid drainage or produce passage, gas-lift production operation is carried out smoothly, shorten duty cycle, the reservoir protection effect of strengthening under balance pressure drilling, Oil/gas Well can be gone into operation in time, good production capacity is kept to promote effect, and then improve Unbalance technique competitiveness, in oil pipe, blowout hookup 2 can realize direct circulation operation, enter in process 1 time at tubing string, when running into well overflow and being serious, adopt density higher than borehole fluid circulation of fluid carry out direct circulation dispose overflow, when direct circulation stops, production passage in oil pipe in blowout hookup 2 is closed automatically, then continues the function fulfiling blowout prevention, and the tubing string being convenient to continue to implement no killing well enters operation 1 time.
embodiment 2: as the optimization of above-described embodiment, in oil pipe, blowout hookup 2 is shutter-type oil pipe float valve device, valve holder is valve valve seat, and valve is arranged in valve valve seat by torsion spring, in the third step, in oil pipe, tapping pin is dropped into by production tree 7, tapping pin pushes away under the valve valve seat in shutter-type oil pipe float valve device, and valve valve seat and valve fall in hand basket 3 in the lump, by the through hole 8 on hand basket 3, tubing string 1 is communicated with in well, tubing string 1 is communicated with in well, sets up and produce passage.Shutter-type oil pipe float valve device employing notification number is the technology in the Chinese patent literature of CN202500534U.
embodiment 3: as the optimization of above-described embodiment, in oil pipe, blowout hookup 2 to build the pressure opening type oil pipe level pressure float valve for pitching, valve holder is spool, valve is arranged on spool, in the third step, build the pressure in opening type oil pipe level pressure float valve to pitching and drop into pressure ball of spraining, the ball sealing that builds the pressure blocks up the spool flow-guiding channel that pitching builds the pressure in opening type oil pipe level pressure float valve, in oil pipe, inject working fluid by production tree 7 to build the pressure, valve on the spool of the opening type oil pipe level pressure that pitching built the pressure float valve and spool is delivered in hand basket 3 together, by the through hole 8 on hand basket 3, tubing string 1 is communicated with in well, set up and produce passage.The pitching opening type oil pipe level pressure float valve that builds the pressure adopts publication number to be technology in the Chinese patent literature of CN102606108A.
embodiment 4: as the optimization of above-described embodiment, working fluid is water or oily or mud.The selection gist individual well actual conditions of working fluid and determining.
embodiment 5: be with the difference of above-described embodiment, in the 4th step, production tree 7 fixedly mounts reclaimer by surface line, returns out fluid recovery in reclaimer.
embodiment 6: be with the difference of above-described embodiment, in 4th step, before injecting lifting gas to the annular space between tubing string 1 and sleeve pipe 5, the displacement fluid of density lower than the original fluid in down-hole is pumped into direct circulation in tubing string 1, from the original fluid recovery in the down-hole displaced in well to reclaimer by production tree 7.
embodiment 7: as the optimization of above-described embodiment, lifting gas is natural gas or nitrogen or carbon dioxide.
Claims (11)
1. under an insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do, it is characterized in that carrying out as follows: the first step, sequentially blowout hookup and hand basket in oil pipe is fixedly mounted from top to bottom in the bottom of tubing string, in oil pipe, blowout hookup internal fixtion installs valve holder, in valve holder, valve is installed, the reverse gas lift valve of one is no less than in the fixed installation of the middle part of tubing string, the upper end of sleeve pipe is fixed on well head, oil recovery four-way is fixedly mounted on the sleeve pipe above well head, wherein: the head of liquid starting pressure of reverse gas lift valve being set greater than lower going-into-well section, second step, to enter under tubing string in sleeve pipe, then the upper end base of tubing string is hung in oil recovery four-way, finally by setting for production tree on oil recovery four-way, wherein: under in the process that enters, to under the tubing string entered to different well section carry out direct circulation operation, when direct circulation operation each time starts, the valve in oil pipe on blowout hookup is opened automatically, after the direct circulation end of job, valve is closed automatically, under control the pressure between sleeve pipe and tubing string by rotating blowout preventer in the process that enters, 3rd step, promotes the valve holder in interior blowout hookup downwards and falls into in hand basket, by the through hole on hand basket, tubing string being communicated with in well, sets up and produces passage, 4th step, injects lifting gas to the annular space between tubing string and sleeve pipe, and lifting gas will return out fluids in series by the through hole on hand basket, tubing string, oil recovery four-way and production tree gaslift to ground in well.
2. under insufficient balance well completion according to claim 1, oil pipe and gaslift are gone into operation the method joining and do, it is characterized in that in oil pipe, blowout hookup is shutter-type oil pipe float valve device, valve holder is valve valve seat, valve is arranged in valve valve seat by torsion spring, in the third step, in oil pipe, tapping pin is dropped into by production tree, tapping pin pushes away under the valve valve seat in shutter-type oil pipe float valve device, valve valve seat and valve fall in hand basket in the lump, by the through hole on hand basket, tubing string is communicated with in well, set up and produce passage.
3. under insufficient balance well completion according to claim 1, oil pipe and gaslift are gone into operation the method joining and do, to it is characterized in that in oil pipe that blowout hookup is that pitching builds the pressure opening type oil pipe level pressure float valve, valve holder is spool, valve is arranged on spool, in the third step, build the pressure in opening type oil pipe level pressure float valve to pitching and drop into the ball that builds the pressure, the ball sealing that builds the pressure blocks up the spool flow-guiding channel that pitching builds the pressure in opening type oil pipe level pressure float valve, in oil pipe, inject working fluid by production tree to build the pressure, valve on the spool of the opening type oil pipe level pressure that pitching built the pressure float valve and spool is delivered in hand basket together, by the through hole on hand basket, tubing string is communicated with in well, set up and produce passage.
4. under insufficient balance well completion according to claim 3, oil pipe and gaslift are gone into operation the method joining and do, and it is characterized in that working fluid is water or oil or mud.
5. under the insufficient balance well completion according to claim 1 or 2 or 3 or 4, oil pipe and gaslift are gone into operation the method joining and do, and it is characterized in that, in the 4th step, production tree fixedly mounting reclaimer by surface line, return out fluid recovery in reclaimer.
6. under the insufficient balance well completion according to claim 1 or 2 or 3 or 4, oil pipe and gaslift are gone into operation the method joining and do, it is characterized in that in the 4th step, before injecting lifting gas to the annular space between tubing string and sleeve pipe, the displacement fluid of density lower than the original fluid in down-hole is pumped into direct circulation in tubing string, from the original fluid recovery in the down-hole displaced in well to reclaimer by production tree.
7. under insufficient balance well completion according to claim 5, oil pipe and gaslift are gone into operation the method joining and do, it is characterized in that in the 4th step, before injecting lifting gas to the annular space between tubing string and sleeve pipe, the displacement fluid of density lower than the original fluid in down-hole is pumped into direct circulation in tubing string, from the original fluid recovery in the down-hole displaced in well to reclaimer by production tree.
8. under the insufficient balance well completion according to claim 1 or 2 or 3 or 4, oil pipe and gaslift are gone into operation the method joining and do, and it is characterized in that lifting gas is natural gas or nitrogen or carbon dioxide.
9. under insufficient balance well completion according to claim 5, oil pipe and gaslift are gone into operation the method joining and do, and it is characterized in that lifting gas is natural gas or nitrogen or carbon dioxide.
10. under insufficient balance well completion according to claim 6, oil pipe and gaslift are gone into operation the method joining and do, and it is characterized in that lifting gas is natural gas or nitrogen or carbon dioxide.
Under 11. insufficient balance well completions according to claim 7, oil pipe and gaslift are gone into operation the method joining and do, and it is characterized in that lifting gas is natural gas or nitrogen or carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310431641.8A CN103470222B (en) | 2013-09-22 | 2013-09-22 | Under insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do |
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| CN201310431641.8A CN103470222B (en) | 2013-09-22 | 2013-09-22 | Under insufficient balance well completion, oil pipe and gaslift are gone into operation the method joining and do |
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| CN103470222A CN103470222A (en) | 2013-12-25 |
| CN103470222B true CN103470222B (en) | 2016-04-06 |
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| CN106481319B (en) * | 2016-10-20 | 2019-10-11 | 中国石油化工股份有限公司 | Gas-lift well drain simulation test device and test method |
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