CN108999597A - A kind of center completion tubular column and gaslift construction method for gaslift production - Google Patents
A kind of center completion tubular column and gaslift construction method for gaslift production Download PDFInfo
- Publication number
- CN108999597A CN108999597A CN201810908814.3A CN201810908814A CN108999597A CN 108999597 A CN108999597 A CN 108999597A CN 201810908814 A CN201810908814 A CN 201810908814A CN 108999597 A CN108999597 A CN 108999597A
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- China
- Prior art keywords
- seat
- oil pipe
- coiled tubing
- operating pressure
- hanger
- Prior art date
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Classifications
-
- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
-
- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
Abstract
The invention discloses a kind of center completion tubular columns and gaslift construction method for gaslift production, including the complete well oil pipe of Operating Pressure, external hanger, coiled tubing, blanking plug, operation annular space is equipped between the coiled tubing and the complete well oil pipe of Operating Pressure, the bottom of the coiled tubing is connected with blanking plug, the external hanger is equipped with apocenosis passage and is connected with operation annular space, apocenosis passage is connected with bypass flange, is connected with ball-and-seat in the bottom of the complete well oil pipe of Operating Pressure.The present invention on external hanger by being arranged bypass flange, it can be used as production apocenosis passage, it by coiled tubing and the complete smaller annular space of well oil pipe of Operating Pressure, is mentioned for gas well lower for critical liquid carrying flow rate, is providing channel compared with the continuous production under low yield for gas well；In the case where hydrops occurs for the complete well oil pipe of Operating Pressure, by squeezing into nitrogen to coiled tubing, ball-and-seat is closed, pit shaft quickly effectively can be discharged in hydrops in the complete well oil pipe of Operating Pressure, so that reducing wellbore effusion influences gas well liquid loading bring.
Description
Technical field
The present invention relates to a kind of petroleum gas fields, and in particular to it is a kind of for gaslift production center completion tubular column and
Gaslift construction method.
Background technique
During gas reservoir development, pit shaft high-speed gas-liquid two phase flow wash away for a long time casing and casing top casing head,
The components such as tubing head, there are certain well control safety risks；Gas well is produced by casing, critical to take because casing inner diameter is larger
After formation water output preferably cannot be carried out pit shaft by flow quantity, it just will appear wellbore effusion, and then influence gas well liquid loading.Cause
This all can tripping in 2 generally after the completion of gas well gas testing7/8Or 23/8Conventional oil pipe has carried out well.
But gas well liquid loading is to certain time, and with the decline of strata pressure, gas flow rate is reduced, and gas well fluid-carrying capability is gradually
It is deteriorated.Pit shaft starts hydrops occur, and shaft bottom back pressure is continuously increased, and causes gas well liquid loading pressure difference to reduce, yield sharp fall.Such as
What further increases gas well fluid-carrying capability, slows down wellbore effusion, extends gas well mining time, is to need emphasis to grind in gas field development
Study carefully the technical problem of solution.
The method that scene proposes is just to fully consider that completion tubular column designs the influence to gas well liquid loading at gas well completion initial stage,
Currently, the completion tubular column of field application is in production, there are the deficiencies of following several respects:
(1) nearly 10 days of completion tubular column construction period under Operating Pressure, single time operating cost nearly 1,000,000, and wind of constructing
Danger is high, how to reduce replacement completion tubular column number, is problem urgently to be resolved；
(2) all there is the rule of decline of pressure in nearly all gas well, after the gas well liquid loading regular hour, gas well reservoir pressure
Power can decline, the completion tubular column of original tripping in equally can not meet it is current it is critical take liquid requirement, pit shaft will appear hydrops, thus shadow
Ring the production of gas well；
(3) if hydrops is up to certain degree, original completion tubular column bottom end is caused to be flooded, conventional nitrogen gaslift, bubble
The techniques such as foam draining are short there are validity period, and repeatedly investment causes cost huge.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of construction peace in view of the deficiency of the prior art
Entirely, reliably, sustainable operation for gaslift production center completion tubular column and gaslift construction method.
The technical scheme adopted by the invention is as follows: a kind of center completion tubular column for gaslift production, including Operating Pressure
Complete well oil pipe, external hanger, coiled tubing, blanking plug, the complete well oil pipe of Operating Pressure are suspended on oil by hanger
In tube head, the coiled tubing is lifted in the complete well oil pipe of Operating Pressure by external hanger, the coiled tubing and band
It presses and is equipped with operation annular space between the complete well oil pipe of operation, the bottom of the coiled tubing is connected with blanking plug, it is characterised in that: described
External hanger is equipped with apocenosis passage and is connected with operation annular space, and apocenosis passage is connected with bypass flange, in Operating Pressure
The bottom of complete well oil pipe is connected with ball-and-seat, and the pressure inside the complete well oil pipe of Operating Pressure is greater than outside the complete well oil pipe of Operating Pressure
The pressure in portion, the ball-and-seat are closed, and the pressure outside the complete well oil pipe of Operating Pressure is greater than inside the complete well oil pipe of Operating Pressure
Pressure when, ball-and-seat open.
According to the above technical scheme, the ball-and-seat includes ball-and-seat seat, and the ball-and-seat seat is fixed on the complete well of Operating Pressure
On oil pipe, ball-and-seat bar is coated in the centre bore of ball-and-seat seat, the ball-and-seat bar and the sliding of ball-and-seat seat configure, described
The both ends of ball-and-seat bar are conical seal (contact) face, spring can be set on ball-and-seat with the centre bore seal arrangement of ball-and-seat seat,
The both ends of the spring are supported at the conical seal (contact) face of ball-and-seat seat and ball-and-seat bar upper end, are equipped in the lower end of ball-and-seat bar
It is connected inside circulation passage and the complete well oil pipe of Operating Pressure.
According to the above technical scheme, the ball-and-seat bar includes the upper valve rod and lower valve rod designed at T-type, in lower valve rod
Lower end to upper end is equipped with circulation passage.
According to the above technical scheme, the external hanger includes that locking type sits hanging joint, seal assembly, hanger sheet
Body, the coiled tubing sits hanging joint by locking type and seal assembly is suspended in hanger body, in hanger body
Apocenosis passage is equipped with positioned at the lower end of seal assembly to be connected with bypass flange.
According to the above technical scheme, the hanger body includes seat under the sequentially connected hanger seat of honour, hanger, continuously
Oil pipe passes sequentially through seat under the hanger seat of honour, hanger, and the apocenosis passage is arranged under hanger on seat, the bypass flange
With seat phase configuration under hanger.
According to the above technical scheme, seat is located between the lower end inner wall and coiled tubing of apocenosis passage and is equipped under the hanger
Gap is connected with operation annular space.
According to the above technical scheme, the seal assembly is fixed in hanger body by jackscrew；The seal assembly packet
The slip spider sitting the hanging joint seat of honour, connecting with the seat hanging joint seat of honour is included, taper slips, institute are provided in the bellmouth of slip spider
It states taper slips inner wall and coiled tubing outer wall anchors.
It is a kind of to carry out gaslift construction method using central tube completion tubular column described in claim 1, it is characterised in that:
Step 1: installation Operating Pressure equipment and pressure testing, wherein Operating Pressure equipment includes safe preventer group, work
Preventer group, hydraulic pressure lifting device, control device etc.；
It is installed Step 2: well tool will be entered, christmas tree is removed, by Operating Pressure equipment by tool and tubing string in pit shaft
Tripping in situation with pressure, the complete well oil pipe of installation Operating Pressure and coiled tubing, close No. 1 gate valve after pressure testing is qualified, remove band
Operating equipment is pressed, christmas tree is installed；
The capping tools of the complete well oil pipe of Operating Pressure are opened Step 3: building the pressure, gas well is allow to pass through the complete well of Operating Pressure
Oil pipe is produced；
Step 4: installation coiled tubing wellhead equipment and pressure testing, wherein coiled tubing wellhead equipment includes coiled tubing note
Enter head, coiled tubing operation window, preventer and lubricator；
Step 5: connection external hanger, external hanger body is mounted on above No. 1 valve, specifically:
Attended operation window and hanger intert oil pipe, do rolling-type oil pipe connector, connect into well tool, pressure testing is qualified
After drive a well port strobe, decentralization coiled tubing to design design well depth；Hanger jackscrew is unclamped, operation window is opened, hanger card is installed
Watt, jackscrew is tightened, coiled tubing is sheared, christmas tree is installed；
Step 6: opening No.1 valve, liquid feeding pressure in coiled tubing, tube used for bottom pouring column bottom blanking plug opens production channel, into
Row production；
Step 7: connecting nitrogen when needing gaslift and being pumped into equipment, from christmas tree inlet, injection nitrogen makes ball-and-seat
It closes, external hanger bypass flange is connected to open flow pond, and bypass flanged outlet realizes that gaslift is made as gas lift liquid drainage channel
Industry construction；
Step 8: needing to put into bott stick into coiled tubing in well head when having needed coiled tubing out, realize pair
Effective closure of coiled tubing in well facilitates coiled tubing to rise safely；
Step 9: needing again well head to throw into the complete well oil pipe of Operating Pressure when having needed the complete well oil pipe of Operating Pressure out
Enter blanking plug, realize effective closure to the complete well oil pipe of Operating Pressure in well, the safety of the complete well oil pipe of scheme Operating Pressure rises.
It is obtained by the present invention to have the beneficial effect that
1, the present invention can be used as production apocenosis passage, pass through company by the way that bypass flange is arranged on external hanger
Continuous oil pipe and the complete smaller annular space of well oil pipe of Operating Pressure, mention lower for critical liquid carrying flow rate for gas well, are gas well compared with low yield
Continuous production under amount provides channel；In the case where hydrops occurs for the complete well oil pipe of Operating Pressure, by being squeezed into coiled tubing
Nitrogen closes ball-and-seat, pit shaft quickly effectively can be discharged in hydrops in the complete well oil pipe of Operating Pressure, to reduce pit shaft product
Liquid influences gas well liquid loading bring.
2, the present invention can be realized in the case where motionless original flow string, and the coiled tubing of tripping in smaller diameter carries out
Complete well provides the production channel for needing smaller critical liquid carrying flow rate for gas well, can also by ball-and-seat cooperate coiled tubing into
Draining is lifted in promoting the circulation of qi, can effectively reduce influence of the wellbore effusion to gas well liquid loading.
3, do not change the structure of well head original christmas tree when the present invention has carried out well using external hanger, it is raw to be conducive to the later period
Produce management；Coiled tubing blanking plug has cracking pressure that is stable, can setting as the case may be, and neither makes after unlatching
At trouble of lost tool in hole, later period measure operation is influenced, blocking will not produce channel in production；
4, ball-and-seat does not influence the performance of tubing string with completion tubular column tripping in, and one can be provided for gaslift in the later period
Enclosure space greatly promotes gas lift efficiency.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is external continuous tubing hanger structural schematic diagram.
Fig. 3 is the structure chart of hanger seal assembly.
Fig. 4 is the structure chart of ball-and-seat.
Fig. 5 is the structure chart of blanking plug in the present invention.
Fig. 6 is the structure chart of bott stick in the present invention.
Fig. 7 is installation wellhead assembly ground construction flow diagram.
Accompanying drawing number are as follows: 1, christmas tree, 2, external continuous tubing hanger, 3, well head No.1 gate valve, 4, tubing head, 5,
Oil pipe, 6, coiled tubing, 7, casing, 8, coiled tubing blanking plug, 9, ball-and-seat, 10, flow control valve, 11, external it is continuous
The boll-weevil hanger seat of honour, 12, jackscrew assembly, 13, seal assembly, 14, seat under external continuous tubing hanger, 15, drain it is logical
Road, 16, slips, 17, slip spider, 18, Sealed adhesive bucket, 19, fixing screws, 20, seat under seal assembly, 21, ball-and-seat valve rod,
22, spring, 23, ball-and-seat seat, 24, sealing ring, 25, seal operation cylinder, 26, check pin, 27, screen casing, 28, closure piston,
29, it blocks piston and starts shear pin, 30, piston lock ring, 31, target seeker, 32, rolling link slot, 33, sealing drum inner convex platform, 34, sieve
Pipe air inlet, 35, step in screen casing, 36, sealing knock-off joint, 37, sealing ring, 38, piston bush, 39, sealing bar piston, 40, close
Seal lever lock spring, 41, lock-on connection, 42, sealing bar piston start shear pin, 43, pressure transmission hole, 44, step in piston bush, 45, locking
Connector positioning step, 46, locking spring refer to, 47, gooseneck boom, 48, injection head, 49, blowout prevention box, 50, blooie pipe, 51, preventer,
52, operation window, 53, ram preventer.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, present embodiments providing a kind of complete well flow string of central tube, it includes external hanger 2, band
Operation completion tubular column 5, coiled tubing 6, blanking plug and bott stick are pressed, 6 upper end of coiled tubing and external hanger 2 seal
Configuration, is suspended on external hanger, the external hanger is installed in No. 13 top of gate valve of well head, well head No.1 valve 3
It is installed in the top of well head oil tube head 4, Operating Pressure completion tubular column 5 is suspended in tubing head by hanger.The continuous oil
Pipe 6 is mounted in Operating Pressure completion tubular column 5 by external hanger suspension 2, the bottom of the coiled tubing 6 and blanking plug
8 are connected, and when lower tubular column, blanking plug blocks coiled tubing, and tubing string has realized that well produces by hydraulic open blanking plug, bott stick
Cooperate secondary plugging coiled tubing with blanking plug when for playing completion tubular column.
In the present embodiment, as shown in Fig. 2, external hanger includes that locking type sits hanging joint 13, hanger body 14.It is outstanding
Hanging device ontology 14 is arranged on No. 13 top of gate valve, and the hanger body includes the sequentially connected hanger seat of honour 11, seals always
At seat 14 under 13, hanger, coiled tubing 6 sequentially passes through seat 14 under the hanger seat of honour 11, seal assembly 13, hanger, outstanding
The upper end periphery of seat 14 is provided with jackscrew pressing groove under hanging device, and seal assembly upper end acts on sealing always by tubing head jackscrew 12
At in 13 jackscrew pressing groove.
In the present embodiment, as shown in figure 3, seal assembly have slips 16, slip spider 17, Sealed adhesive bucket 18, fixing screws 19,
Seat 20 forms under seal assembly.The slips 16 has 4 valves, is engaged by slips internal tooth with coiled tubing 6, Sealed adhesive bucket 18 passes through
Jackscrew forms sealing effect after compressing centrum, fixing screws 19 by seat 20 under slip spider 17, Sealed adhesive bucket 18, seal assembly into
Row fastening.Pressing force is pressed in the self weight of coiled tubing 6 and jackscrew, Sealed adhesive bucket 18 is made to insulate wellbore annulus pressure.
As shown in Fig. 2, being equipped with apocenosis passage 15 and bypass flange positioned at the lower end of seal assembly on seat 14 under hanger
It is connected.The operation annular space production channel that bypass flange can be used as coiled tubing 6 and the complete well oil pipe 4 of Operating Pressure carry out production or
Channel as gaslift operation.
In the present embodiment, as shown in figure 4, the ball-and-seat includes ball-and-seat seat 23, the ball-and-seat seat is fixedly mounted on
The lower end of the complete well oil pipe 5 of Operating Pressure is coated with ball-and-seat bar 21, the ball-and-seat bar 21 in the centre bore of ball-and-seat seat 23
It slides and configures with ball-and-seat seat, the both ends of the ball-and-seat bar are conical seal (contact) face, can seal and match with the centre bore of ball-and-seat seat
It sets, spring 22 is set on ball-and-seat, the both ends of the spring 22 are supported mounted in ball-and-seat seat 23 and 21 upper end of ball-and-seat bar
At conical seal (contact) face, it is equipped with inside circulation passage and the complete well oil pipe of Operating Pressure and is connected in the lower end of ball-and-seat bar.The list
Flowing valve rod 21 includes the upper valve rod and lower valve rod designed at T-type, is equipped with circulation passage in the lower end of lower valve rod to upper end.It is described
Ball-and-seat 4 is placed in the lower end of completion practice oil pipe 5 by box cupling fixator, is lowered into the horizontal segment of horizontal well, is just generating
During production, due to 22 elastic force of spring act on, ball-and-seat valve rod 21 is jacked up, shaft bottom biphase gas and liquid flow can under strata pressure,
By flowing out at the circulation passage on ball-and-seat valve-rod body, when needing gaslift to drain, high pressure gas is injected into coiled tubing 6
Interior, ball-and-seat valve rod 21 is because upper end captured area is big, and under the action of certain positive pressure, spring 22 compresses, under ball-and-seat valve rod 21
Row sealing circulation passage, plays the role of sealing oil pipe, and liquid is carried flowline by high pressure gas, is more advantageous to gas well draining and adopts
Gas.
In the present embodiment, as shown in figure 5, blanking plug 8 includes the seal operation cylinder 25 being successively linked in sequence from top to bottom, sieve
Pipe 27, seeker 31,25 upper end outer surface of seal operation cylinder are machined with multiple rolling link slots 32 and are set with the use of sealing ring 24
It is connected in coiled tubing sealing, sealing drum inner convex platform 33 is processed inside lower end, sealing drum inner convex platform 33 is needed for subsequent
Out when coiled tubing, bott stick is limited；The upper end sealing shroud of the screen casing 27 is outside seal operation cylinder 25, the sieve
Pipe 27 prevents the connection between seating nipple 25 from loosening by check pin 26.It is equipped with to block in the upper end internal sleeve of screen casing 27 and live
Plug 28, is provided with multiple screen casing air inlets 34 at the middle part of screen casing 27, in the screen casing that the lower end of screen casing is provided with that internal diameter becomes larger
Step 35.The closure piston 28 is fixed in screen casing 25 by starting pin 29, in the lower end housing for blocking piston 28
Equipped with piston lock ring 30；Seeker 31 prevents closure piston 28 from falling to form underground for closing to the end of screen casing 27
Junk.
When having needed coiled tubing out, seal operation cylinder 25 is provided with the bott stick with its seal arrangement,
Structure is as shown in fig. 6, the bott stick includes the blocking knock-off joint 36 being successively linked in sequence from top to down, piston bush 38, locking
Connector 41 is provided with pressure transmission hole 43 in the blocking knock-off joint 36, and outer end is provided with sealing ring 37, and the pressure transmission hole 43 is used for will
Hydraulic pressure transfer gives the sealing piston 39 being arranged in piston bush 38, and the lower end of the sealing bar piston 39 is solid by starting shear pin 42
It is scheduled on lock-on connection 41, limited position mechanism and retaining mechanism is set on the bott stick, the position-limit mechanism setting is being locked
The lower end of tight coupling 41, and it is corresponding with the locating part 33 on seal operation cylinder 25；Locking is provided on sealing bar piston 39
Mechanism.
The present embodiment additionally provides a kind of complete well of central tube and gaslift construction method comprising following steps:
(1), installation Operating Pressure equipment and pressure testing, wherein Operating Pressure equipment includes safe preventer group, work blowout prevention
Device group, hydraulic pressure lifting device, control device etc.；
(2), well tool will be entered to install, and christmas tree will be removed, by Operating Pressure equipment by tool and tubing string in wellbore zone
Tubing string is suspended on inside casing head by tripping in the case where pressure by boll-weevil hanger, and completion tubular column tripping in designs well depth, is sat and is hung
Hanger closes No. 1 valve after pressure testing is qualified, removes Operating Pressure equipment, installs christmas tree；
(3), it by pump truck small displacement injected clear water into oil pipe, builds the pressure and opens oil pipe capping tools, lead to gas well
Completion tubular column is crossed to be produced；
(4) install coiled tubing wellhead equipment (as shown in fig. 7, coiled tubing wellhead equipment include coiled tubing, roller,
Pump truck, flow container, multiple valves, multiple connecting pipelines, coiled tubing injection head 48, coiled tubing operation window 52, preventer 51 and
Built-in hanger lubricator 50 etc. can be accommodated), and pressure testing.Specifically: coiled tubing injection head is successively installed from top to bottom, is connected
Continuous tubing manipulation window, preventer, lubricator 50, are inserted into coiled tubing, carry out pressure testing test.Wherein, coiled tubing operation window 53
For providing operating space in tubing string Completion Operations, to shear coiled tubing.
(5) external hanger body is installed on No. 13 top of gate valve (as shown in Figure 7).Specifically: wellhead assembly examination
After pressing lattice, closes No. 1 gate valve and remove the gas production wellhead on No. 13 top of gate valve, tripping in coiled tubing injection head to appropriate position
It sets, blanking plug 8 is installed, pressure testing examination is drawn, injection head docking and well head, whole pressure testing.
(6) No. 1 gate valve 3 is opened, by 6 tripping in of coiled tubing to design position, jackscrew 12 is tightened, closes preventer kill-job end
Mouthful, pressure testing.
(7) operation window 52 is opened, hanger slips 16 is installed, shutoff operation window 52 unclamps hanger jackscrew 12, and decentralization is continuous
Oil pipe 6 simultaneously pressurizes, confirmation suspension reliability.
(8) hanger jackscrew 12 is tightened, hanger leakproofness is tested, after qualified, shears coiled tubing 6, injection head is hung
Well head installs christmas tree and production procedure.
(9) well head christmas tree is loaded onto, No.1 valve is opened, liquid feeding pressure in coiled tubing makes closure piston 28 cut starting and cuts
Nail 29, and go downwards in 27 screen casing of screen casing at step 35, mutually blocked by step 35 in piston lock ring 30 and screen casing, realizes lock piston
The fixation of ring 30 and screen casing 27, so that tube used for bottom pouring column bottom blanking plug, opens production channel, completes coiled tubing completion tubular column,
It is produced.Trouble of lost tool in hole is neither caused after cracking pressure can be reached using this blanking plug, influences later period measure operation, it will not
The purpose in blocking production channel in production.
(10) when needing gaslift to construct, the entrance of coiled tubing 6 on gaslift pump truck and christmas tree is connected, with a constant flow pump
Enter gas, gas enters completion tubular column 5 from coiled tubing 6, and coiled tubing 6 and 5 annular space of oil pipe take liquid channel as nitrogen, by well
Cylinder hydrops carries out pit shaft, achievees the purpose that water pumping gas production.When gaslift construction terminates, 6 pressure release of coiled tubing, ball-and-seat 9 is in bullet
It is opened under the pressure on spring 22 and stratum, gas well can carry out taking liquid production by reservoir energy.
(11) it when having needed coiled tubing out, needs to put into bott stick into coiled tubing in well head, bott stick is in quilt
After putting into blanking plug, fluid power is applied in sealing piston 39 by pressure transmission hole 43, at this point, locking spring refers to that 46 can in fluid power and again
Power acts on lower contraction distortion until the locating part 33 for passing through seal operation cylinder 25 is annular convex platform, and is carried out by positioning step 45
Limit, continues through the mode of pressurization, bott stick piston 39 will cut starting shear pin 42 under the action of fluid power and downlink up to
Mutually block in into lock-on connection 41 and by step 44 in bott stick snap 40 and piston bush, realize locking, at this point, bott stick is logical
It crosses positioning step 44 and locking spring refers to that 45 are limited.As a result, by the way that matched bott stick is arranged, realize to continuous in well
Effective closure of oil pipe facilitates tubing string to rise safely.
Claims (8)
1. a kind of center completion tubular column for gaslift production, including the complete well oil pipe of Operating Pressure, external hanger, continuous oil
Pipe, blanking plug, the complete well oil pipe of Operating Pressure are suspended in tubing head by hanger, and the coiled tubing passes through external
Hanger is lifted in the complete well oil pipe of Operating Pressure, and operation ring is equipped between the coiled tubing and the complete well oil pipe of Operating Pressure
The bottom of sky, the coiled tubing is connected with blanking plug, it is characterised in that: the external hanger is equipped with apocenosis passage and makees
Industry annular space is connected, and apocenosis passage is connected with bypass flange, is connected with ball-and-seat in the bottom of the complete well oil pipe of Operating Pressure, when
Pressure inside the complete well oil pipe of Operating Pressure is greater than the pressure outside the complete well oil pipe of Operating Pressure, and the ball-and-seat is closed, and works as band
When the pressure outside the complete well oil pipe of operation being pressed to be greater than the pressure inside the complete well oil pipe of Operating Pressure, ball-and-seat is opened.
2. center completion tubular column according to claim 1, it is characterised in that: the ball-and-seat includes ball-and-seat seat, described
Ball-and-seat seat is fixed on the complete well oil pipe of Operating Pressure, and ball-and-seat bar, single stream are coated in the centre bore of ball-and-seat seat
Valve rod and the sliding of ball-and-seat seat configure, and the both ends of the ball-and-seat bar are conical seal (contact) face, can be close with the centre bore of ball-and-seat seat
Envelope configuration, is set with spring on ball-and-seat, and the taper mounted in ball-and-seat seat and ball-and-seat bar upper end is supported at the both ends of the spring
At sealing surface, it is equipped with inside circulation passage and the complete well oil pipe of Operating Pressure and is connected in the lower end of ball-and-seat bar.
3. center completion tubular column according to claim 2, it is characterised in that: the ball-and-seat bar includes designing at T-type
Upper valve rod and lower valve rod, the lower end of lower valve rod to upper end be equipped with circulation passage.
4. center completion tubular column according to claim 1 or 2, it is characterised in that: the external hanger includes locking
Formula sits hanging joint, seal assembly, hanger body, and the coiled tubing sits hanging joint by locking type and seal assembly is suspended on
In hanger body, apocenosis passage is equipped with positioned at the lower end of seal assembly in hanger body and is connected with bypass flange.
5. center completion tubular column according to claim 4, it is characterised in that: the hanger body includes sequentially connected
Seat under the hanger seat of honour, hanger, coiled tubing pass sequentially through seat under the hanger seat of honour, hanger, the apocenosis passage setting
Under hanger on seat, seat phase configuration under the bypass flange and hanger.
6. center completion tubular column according to claim 5, it is characterised in that: seat is located at apocenosis passage under the hanger
Gap is equipped between lower end inner wall and coiled tubing to be connected with operation annular space.
7. center completion tubular column according to claim 4, it is characterised in that: the seal assembly is fixed on outstanding by jackscrew
In hanging device ontology；The seal assembly includes the slip spider sitting the hanging joint seat of honour, connecting with the seat hanging joint seat of honour, in slip spider
Taper slips is provided in bellmouth, the taper slips inner wall and coiled tubing outer wall anchor.
8. a kind of carry out gaslift construction method using central tube completion tubular column described in claim 1, it is characterised in that:
Step 1: installation Operating Pressure equipment and pressure testing, wherein Operating Pressure equipment includes safe preventer group, work blowout prevention
Device group, hydraulic pressure lifting device, control device；
It is installed Step 2: well tool will be entered, removes christmas tree, it is by Operating Pressure equipment that tool and tubing string is with pressure in pit shaft
In the case where tripping in, the complete well oil pipe of installation Operating Pressure and coiled tubing, close No. 1 gate valve after pressure testing is qualified, remove work with pressure
Industry equipment installs christmas tree；
The capping tools of the complete well oil pipe of Operating Pressure are opened Step 3: building the pressure, gas well is allow to pass through the complete well oil pipe of Operating Pressure
It is produced；
Step 4: installation coiled tubing wellhead equipment and pressure testing, wherein coiled tubing wellhead equipment includes coiled tubing injection
Head, coiled tubing operation window, preventer and lubricator；
Step 5: connection external hanger, external hanger body is mounted on above No. 1 valve, specifically: attended operation
Window and hanger intert oil pipe, do rolling-type oil pipe connector, connect into well tool, and drive a well port strobe after pressure testing is qualified, decentralization
Coiled tubing to design designs well depth；Hanger jackscrew is unclamped, operation window is opened, hanger slips is installed, tightens jackscrew, shearing connects
Continuous oil pipe, installs christmas tree；
Step 6: opening No.1 valve, liquid feeding pressure in coiled tubing, tube used for bottom pouring column bottom blanking plug is opened production channel, is given birth to
It produces；
Step 7: connecting nitrogen when needing gaslift and being pumped into equipment, from christmas tree inlet, injection nitrogen closes ball-and-seat
It closes, external hanger bypass flange is connected to open flow pond, and bypass flanged outlet realizes gaslift operation as gas lift liquid drainage channel
Construction；
Step 8: needing to put into bott stick into coiled tubing in well head, realizing in well when having needed coiled tubing out
Effective closure of coiled tubing facilitates coiled tubing to rise safely；
Step 9: needing again well head put into Operating Pressure complete well oil pipe when having needed the complete well oil pipe of Operating Pressure out and blocking up
Device is filled in, realizes effective closure to the complete well oil pipe of Operating Pressure in well, the safety of the complete well oil pipe of scheme Operating Pressure rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810908814.3A CN108999597A (en) | 2018-08-10 | 2018-08-10 | A kind of center completion tubular column and gaslift construction method for gaslift production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110952963A (en) * | 2019-10-30 | 2020-04-03 | 中国石油化工股份有限公司 | Structure and method for producing tubular column with pressing-down gas lift |
| CN112377136A (en) * | 2020-11-12 | 2021-02-19 | 中联煤层气有限责任公司 | Speed pipe blanking plug opening method and speed pipe communication method |
| CN112377148A (en) * | 2020-11-12 | 2021-02-19 | 中联煤层气有限责任公司 | Speed pipe communication device and method |
| WO2021052360A1 (en) * | 2019-09-16 | 2021-03-25 | 中国石油天然气股份有限公司 | Permanent packer and extended gas lift method employing permanent packer |
| CN113090231A (en) * | 2021-04-22 | 2021-07-09 | 新疆瀚科油气技术服务有限公司 | Gas lift drainage and gas production integrated speed pipe column and operation process thereof |
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Effective date of registration: 20191206 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petrochemical Co., Ltd. Applicant after: PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE, JIANGHAN OILFIELD BRANCH OF CHINA PETROCHEMICAL CORPORATION Address before: 430035 Hubei city of Wuhan province Gutian two Road No. 37 HSBC Nanniwan Avenue headquarters block fifth B Applicant before: PETROLEUM ENGINEERING TECHNOLOGY RESEARCH INSTITUTE, JIANGHAN OILFIELD BRANCH OF CHINA PETROCHEMICAL CORPORATION |
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Application publication date: 20181214 |