CN105804680A - Under-pressure well repairing working device and method of oil-gas field - Google Patents
Under-pressure well repairing working device and method of oil-gas field Download PDFInfo
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- CN105804680A CN105804680A CN201610322116.6A CN201610322116A CN105804680A CN 105804680 A CN105804680 A CN 105804680A CN 201610322116 A CN201610322116 A CN 201610322116A CN 105804680 A CN105804680 A CN 105804680A
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- annular preventer
- pressure
- box cupling
- oil pipe
- preventer
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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
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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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
Abstract
The invention discloses an under-pressure well repairing working device and method of an oil-gas field. The device comprises a fixed-pressure valve mounted on a getting-in production pipeline; the upper part of a four-way joint is provided with a coupling detector, a lower annular anti-spraying device, a built-in hydraulic lift sub, a three-flashboard anti-spraying device, a sleeve short section and an upper annular anti-spraying device in sequence; the device further comprises a hydraulic control cabinet; the hydraulic control cabinet is connected with the built-in hydraulic lift sub, the three-flashboard anti-spraying device, the upper annular anti-spraying device and the lower annular anti-spraying device respectively; the method comprises the following steps: S1, a sucker rod works; S2, an oil pumping rod, a pump and other tools work. The well repairing working device and method, disclosed by the invention, completely break through a bottleneck of traditional well repairing work; well repairing pressure can be controlled to be lower than getting-in production pressure so that a pressure grade of needed equipment is reduced, the machining and manufacturing cost of the equipment is greatly reduced and the operation cost of an oil-gas well is reduced; furthermore, the difficulty that the well can be repaired only if the well is closed is innovatively overcome.
Description
Technical field
The present invention relates to exploitation of oil-gas field technical field, specifically, be a kind of oil gas field workover operation device with pressure and method.
Background technology
In the process of development of fields, as run into strata pressure change, down-hole accident, change mining type, Technology, adjust the situations such as Development layer series, generally require and carry out workover treatment.Workover treatment mainly comprises the following steps that one, workover rig trips out the tubing string in former well；Two, new tubing string, instrument and equipment are entered under.
For workover treatment, traditional workover treatment method can be summarized as two kinds:
One, using well killing fluid: squeeze in well with high-pressure pump by well killing fluid, kill-job is washed in circulation, relies on the pressure that fluid column produces to be pushed down by well, avoid blowout, then trips out old tubing string and tool equipment again, under enter new tubing string and tool equipment, carry out production of hydrocarbons；
Two, use Operating Pressure equipment: this mode need not wash kill-job, airtight when, trips out former well casing post by Operating Pressure equipment, then enter down new tubing string, instrument and underground equipment, carry out production of hydrocarbons.
But, if carrying out workover treatment by washing the mode of kill-job, well killing fluid not only can pollute stratum, causes that yield declines.It addition, wash kill-job operation to need substantial amounts of time and energy consumption, discharge well killing fluid and require time for, also need additionally to process, increase cost；If adopting the operation device under pressure that currently there are to carry out well workover, owing to each department or each block pressure gap are relatively big, after closing well, well head operation pressure can reach tens MPas, and operations involving high pressure safety coefficient is low, and speed of application is slow, equipment investment is very high.
Especially for whole world old filed the most general mode of production oil pumping pump extraction oil, this mode often adopts sucker rod pump, and including tubing pump, insert pump, screw pump etc., well workover maintenance workload is big.Producing for old filed, the Oil/gas Well yield that (one) pump mode of taking out carries out producing is relatively low, and Inlet pressure or well head inlet pipe communication system pressure are generally 0.7 MPa to 0.8 MPa, are individually 1 MPa to 1.5 MPas.If carrying out no killing well well workover after closing well, well head pressure can gradually rise, so the method for well workover after generally adopting kill-job；(2) the Oil/gas Well proportion by stratum energy blowing production is less, but yield is high.Flowing well is generally sleeve pipe and produces or oil pipe production, and tubular column structure is simple, instrument is less, and Inlet pressure is of a relatively high, reaches 1 MPa to 3 MPas.Kill-job well workover mode can cause the difficulty that drives a well, so the method being typically employed to Operating Pressure；(3) also have some to use electric submersible pump Lifting Technique, but well-repairing work difficulty is also bigger.
After these Oil/gas Well closing wells, bottom pressure recovers to cause well head pressure to gradually rise, and a lot of areas reach tens MPas.Two kinds of well workover modes that everybody adopts in the market, are pass well servicing.
Therefore; obtain and a kind of protect stratum, reduce the activity duration, reduce well workover energy expenditure, reduce cost, reduce the oil gas field workover operation device of well workover difficulty or workover treatment method, become the emphasis of those skilled in the art's technical problem urgently to be resolved hurrily and research.
Summary of the invention
For solving the pollution stratum of traditional workover treatment method existence, safety coefficient is low, time length, energy consumption big, must close the problems such as well servicing, the invention provides a kind of oil gas field workover operation device with pressure and method, by well workover Stress control below the production pressure that enters the station, realizing responding curve of well maintenance, the energy that strata pressure recovers to produce unloads at any time to entering the station in production flow line in well workover process.Present invention reduces the pressure rating of equipment needed thereby, reduce the cost that apparatus processing manufactures, reduce well workover difficulty, thoroughly broken the bottleneck that traditional workover treatment exists, solve the problem closing well servicing.
For achieving the above object, the invention discloses a kind of oil gas field workover operation device with pressure, this device includes being installed on the constant pressure valve entering the station on production flow line, and four-way top installs box cupling survey meter, lower annular preventer, built-in hydraulic elevator, triple ram preventer, casing nipple, upper annular preventer successively；This device also includes hydraulic control cabinet, and hydraulic control cabinet is connected with built-in hydraulic elevator, triple ram preventer, upper annular preventer, lower annular preventer respectively.
By above-mentioned oil gas field workover operation device with pressure, the present invention can realize actuating oil-pumping unit under low voltage situations, oil pipe, pump and instrument；Remove flowing well flow string, gaslift producing well tubing string, lower diameter is less in original production tubing string flow string, sleeve pipe blowing produce and change oil pipe production etc. into.The environment of low pressure of the present invention reduces the requirement to workover treatment equipment intensity, the safety drastically increasing workover treatment, the cost reducing workover treatment, protection ground environment.
Further, upper annular preventer top is also equipped with injection head, and injection head is connected with hydraulic control cabinet, enters or trip out sucker rod or oil pipe with more convenient control underground.
Further, casing nipple is connected with ground tanks by pipeline, and pipeline is provided with pressure release valve；The constant pressure valve pressure set points being installed on the pipeline that enters the station is the former production pressure entered the station.
By opening pressure release valve, the pressure in releasable casing nipple.The pressure set points of constant pressure valve is the former production pressure that enters the station entered the station in pipeline, and when annular space pressure is more than this value, constant pressure valve realizes releasing pressure automatically.The pressure set points of constant pressure valve carries out reasonable set according to actual needs, and in general less than 3 MPas, this pressure range belongs to low pressure for workover treatment, significantly reduces the requirement to workover rig intensity.
Further, hydraulic control cabinet is PLC control cabinet, to realize the Automated condtrol of workover treatment.
Further, upper annular preventer, lower annular preventer are respectively provided with rubber inner core, upper annular preventer, lower annular preventer all can automatically spray containment grease on rubber, automatic spray containment fat during rubber work, stop-leak compound contributes to the slipper seal between sucker rod, oil pipe etc. and annular preventer and reduces frictional resistance.
Another goal of the invention of the present invention is in that to provide a kind of oil gas field workover treatment method with pressure, and the method includes the steps,
S1, plays sucker rod, hollow bar operation:
S11, installs workover rig, installs constant pressure valve entering the station and arranges force value on production flow line, and back-off trips out polished rod, when box cupling is between polished rod sealer and master valve under polished rod, closes production tree master valve, trips out polished rod and polished rod sealer；By polished rod connected pipes blanking plug, under polished rod sealer sealing function, open master valve, enter polished rod under secondary and deliver first oil pipe top of tubing plug closure near boll-weevil hanger position, trip out polished rod and polished rod sealer；Remove four-way top production tree, then four-way top from bottom to top successively install box cupling survey meter, lower annular preventer, built-in hydraulic elevator, triple ram preventer, casing nipple, on annular preventer；
S12, enters polished rod band tubing plug fishing head under third time, pulls blanking plug out, again enter down polished rod, and make-up makes polished rod and sucker rod screwed connection, polished rod and upper annular preventer slipper seal；
S13, pull up out the polished rod of screwed connection, sucker rod, box cupling survey meter detects that box cupling moves upward when lower annular preventer, hydraulic control cabinet controls lower annular preventer rubber and opens, makes box cupling cross lower annular preventer, hydraulic control cabinet controls lower annular preventer rubber and seals sucker rod, open pressure release valve, open annular preventer rubber, continue to lift up polished rod, sucker rod makes box cupling cross annular preventer and can be seated on rod elevator；
S14, transfers and makes first, polished rod bottom rod collar be sitting on rod elevator, and shackle trips out sucker rod；
S15, repeats step S12, S13, S14, trips out whole sucker rod and the instrument being connected with sucker rod, pump piston；
S2, plays oil pipe and pump operation.
The workover treatment method of the present invention is suitable for almost all Oil/gas Wells, especially, for the Oil/gas Well that stratum energy is relatively low, the advantage of the present invention can be given full play to, reduce well workover energy expenditure, improve well workover efficiency, greatly save workover cost, it addition, the present invention carries out the difficulty of well workover after innovatively having captured necessary closing well.
Further, in step S2, play oil pipe and pump operation comprises the steps:
In step S2, play oil pipe and pump operation comprises the steps:
S21, enters tubing plug, the bottom of the oil pipe that closure is connected with pump housing top under in oil pipe；
S22, under enter tubing nipple, make-up is by tubing nipple and boll-weevil hanger screwed connection, tubing nipple and upper annular preventer, lower annular preventer slipper seal；
S23, the tubing nipple of screwed connection successively, boll-weevil hanger, oil pipe are upwards proposed, box cupling survey meter detects and moves upward when the boll-weevil hanger of lower annular preventer, box cupling, and hydraulic control cabinet controls lower annular preventer and opens, and makes boll-weevil hanger, the box cupling lower annular preventer of traverse；Continue to lift up, when boll-weevil hanger, box cupling enter in casing nipple, hydraulic control cabinet controls lower annular preventer and closes, and bleeds off the pressure in casing nipple, upper annular preventer is opened, and makes boll-weevil hanger, box cupling through upper annular preventer and can be seated on pipe elevator；
S24, transfers tubing nipple and boll-weevil hanger, makes the box cupling of first oil pipe be seated on pipe elevator, lays down boll-weevil hanger；
S25, under enter tubing nipple, tubing nipple is connected by make-up with oil pipe thread, makes annular preventer seal annular space, tubing nipple and upper annular preventer slipper seal, opens lower annular preventer, lift up oil pipe；When box cupling survey meter detect next root tubing coupling cross lower annular preventer time, lower annular preventer seal annular space, pressure release valve is opened, and upper annular preventer is opened；Continue oil pipe, carried to enabling this tubing coupling to be seated on pipe elevator, unload oil pipe；
S26, repeats step S25, trips out whole oil pipes on tubing plug top；
S27, when running into the oil pipe with blanking plug, upper annular preventer, lower annular preventer seal annular space simultaneously, and make the upper box cupling of oil pipe end pump be seated on built-in hydraulic elevator, back-off lays down the oil pipe with blanking plug, then oil pipe is lifted up to casing nipple, triple ram preventer sealing wellhead；Opening after pressure release valve bleeds off pressure, hydraulic control cabinet controls to open annular preventer, trips out the oil pipe with blanking plug；
S28, by entering the tubing nipple with plug valve under injection head, hydraulic control cabinet controls pass and closes annular preventer, opens triple ram preventer, and make-up makes the tubing nipple screwed connection pump housing with plug valve；Open lower annular preventer, lift up the pump housing and make the box cupling of the whole pump housing and next root oil pipe of the pump housing enter in casing nipple；Lower annular preventer working seal annular space；Transferring the pump housing, make the tubing coupling of pump housing bottom be seated on built-in hydraulic elevator, back-off unloads lower pump body, is then shut off triple ram preventer sealing wellhead, opens annular preventer and trip out the pump housing after bleeding off pressure；
S29, repeats step S21 to S28, trips out other instrument under whole oil pipe and pump.
Further, in step S13, box cupling is the box cupling between polished rod, sucker rod or the box cupling between sucker rod, piston or the box cupling between sucker rod, instrument or the box cupling between sucker rod, sucker rod；In step S23, box cupling is the box cupling between tubing nipple, boll-weevil hanger or the box cupling between boll-weevil hanger, oil pipe or the box cupling between oil pipe, oil pipe or the box cupling between oil pipe, the pump housing or the box cupling between oil pipe, instrument.
Further, in step S13, when box cupling enters in casing nipple, close lower annular preventer, open pressure release valve, oil gas water is put in the ground tanks to work place, after bleeding off pressure end, turn off pressure release valve, open annular preventer.
Further, in step S11, will enter under the polished rod of screwed connection and sucker rod to bottommost, back-off makes polished rod depart from sucker rod, plays polished rod, when box cupling is between polished rod sealer and master valve under polished rod, close oil recovery christmas tree master valve, trip out polished rod band polished rod sealer.Polished rod connected pipes blanking plug, under polished rod sealer sealing function, opens master valve, enters to deliver first oil pipe top of tubing plug closure near boll-weevil hanger position, trip out polished rod and polished rod sealer under secondary.
The invention have the benefit that the workover operation device of the present invention and method have thoroughly broken the bottleneck that traditional workover treatment exists, the present invention is before workover treatment, entering the station, production flow line installs constant pressure valve, when strata pressure higher than former enter the station production pressure time, can be unloaded to production flow line by constant pressure valve at any time, therefore, well workover pressure just controls below the former production pressure that enters the station always.The use of this constant pressure valve, reduces the pressure rating of equipment needed thereby, cost that apparatus processing manufacture is greatly reduced, and adds oil gas well yield.The present invention thoroughly solves to know clearly and just must can carry out the problem of well workover at closing well, improves efficiency of construction, is suitable to promote the use of widely.
The present invention is effectively prevented from the destruction of rubber in annular preventer in well workover process, protects annular preventer, improves the life-span of annular preventer.
Accompanying drawing explanation
Fig. 1 is oil gas field workover operation device structural representation with pressure.
Fig. 2 is the former oil recovery christmas tree structural representation of oil gas field.
In figure,
1, upper annular preventer；2, casing nipple；3, triple ram preventer；4, built-in hydraulic elevator；5, lower annular preventer；6, constant pressure valve；7, production flow line；8, four-way；9, box cupling survey meter；10, pressure release valve.
Detailed description of the invention
Detailed explanation and explanation is carried out below in conjunction with the Figure of description oil gas field workover operation device with pressure to the present invention and oil gas field workover treatment with pressure method.
Embodiment one:
As it is shown in figure 1, the invention discloses a kind of oil gas field workover operation device with pressure, including being installed on the former constant pressure valve 6 entered the station on production flow line 7, the pressure set points of constant pressure valve 6 is the former pressure entered the station in production flow line 7.In well workover process, when borehole pressure is higher than this pressure, by constant pressure valve 6 releasing pressure automatically, oil gas water is sent in production flow line 7.Four-way 8 top installs box cupling survey meter 9, lower annular preventer 5, built-in hydraulic elevator 4, triple ram preventer 3, casing nipple 2, upper annular preventer 1 successively.Upper annular preventer 1, lower annular preventer 5 are respectively provided with rubber inner core, and upper annular preventer 1, lower annular preventer 5 are respectively provided with the device of the stop-leak compound that can be automatically sprayed on rubber.The present invention needs to use the shear ram closed casing of triple ram preventer 3；This oil gas field workover operation device with pressure also includes hydraulic control cabinet, and in the present embodiment, hydraulic control cabinet is PLC control cabinet, and hydraulic control cabinet is connected with built-in hydraulic elevator 4, triple ram preventer 3, upper annular preventer 1, lower annular preventer 5, injection head respectively.The injection head of the present invention, under hydraulic action, is upwards proposed by injection head or pushes downwards, overcomes the upper top power that oil pipe, sucker rod, instrument etc. are produced by clips clamp force and down-hole pressure so that it is can trip out safely or under enter.Injection head is connected with hydraulic control cabinet, and casing nipple 2 is connected with ground tanks by pipeline, and pipeline is provided with pressure release valve 10.
As it is shown in figure 1, the invention also discloses a kind of oil gas field workover treatment method with pressure, can be applicable to multiple Oil/gas Well, more complicated owing to using sucker rod pump tubing string to carry out the mode of oil recovery gas production, it is example that the Oil/gas Well using sucker rod pump is carried out workover treatment by the present embodiment.This oil gas field workover treatment method with pressure comprises the steps,
S1, plays sucker rod operation:
S11, installs workover rig, installs constant pressure valve 6 and arrange force value on the former production flow line 7 that enters the station.
To enter under the polished rod of screwed connection and sucker rod to bottommost, back-off makes polished rod depart from sucker rod, lifts up polished rod when box cupling is between polished rod sealer and master valve under polished rod, closes production tree master valve, trips out polished rod band polished rod sealer.Polished rod connected pipes blanking plug, under polished rod sealer sealing function, opens master valve, enters to deliver first oil pipe top of tubing plug closure near boll-weevil hanger position, trip out polished rod and polished rod sealer under secondary.Because if not tripping out polished rod, it is impossible to install the structure on four-way 8 top of the present invention；The pressure set points of this constant pressure valve 6 is the former pressure entered the station in production flow line 7, remove the structure on four-way 8 top in Fig. 2, then four-way 8 top from bottom to top successively install box cupling survey meter 9, lower annular preventer 5, built-in hydraulic elevator 4, triple ram preventer 3, casing nipple 2, on annular preventer 1, then pressure testing is carried out, the internal diameter of all devices installed in the present invention is not less than the maximum outside diameter of equipment to be tripped out and box cupling, and the length of casing nipple 2 is rationally arranged according to the length of device to be removed in well；
S12, enters the polished rod with tubing plug fishing head under third time, pulls tubing plug out.Again playing polished rod, make-up makes polished rod screwed connection sucker rod, polished rod and upper annular preventer 1, lower annular preventer 5 slipper seal；
S13, pulls up out the polished rod of screwed connection, sucker rod, and box cupling survey meter 9 detects that box cupling moves upward when lower annular preventer 5, and under hydraulic control, annular preventer 5 is opened, made box cupling cross lower annular preventer 5, and sucker rod continues up；When in the casing nipple 2 that box cupling enters between upper and lower two annular preventers, under hydraulic control, annular preventer 5 cuts out and holds tightly sucker rod, and lower annular preventer rubber seals sucker rod.Open pressure release valve 10 and bleed off the oil gas in casing nipple 2, then go up rubber inside annular preventer 1 and open, it is ensured that box cupling may pass through annular preventer 1.Continue to lift up polished rod, sucker rod makes its box cupling cross annular preventer 1 and can take rod elevator.In this step, box cupling refers to the box cupling between polished rod, sucker rod or the box cupling between sucker rod, sucker rod or the box cupling between sucker rod, instrument or the box cupling between sucker rod, piston；The present invention innovatively have employed the mode of upper and lower two annular preventers cooperation and trips out the box cupling that external diameter is bigger, in the process of whole upwards pull-out sucker rod and box cupling, seals the oil pipe outside sucker rod all the time by upper annular preventer or lower annular preventer；
S14, transfers polished rod, makes first rod collar be seated on rod elevator, polished rod shackle；S15, repeats step S12, S13, S14, trips out whole sucker rod, pump piston.After tripping out during several sucker rods, control sucker rod by injection head and move up and down, now need to meet following condition: upper top power+seal friction resistance that sucker rod and instrument hermetic unit are produced by rod weight≤oil overpressure.
S2, plays oil pipe and pump operation: the upper annular preventer 1 of the present invention, lower annular preventer 5 can be used to hold tightly sealing sucker rod, also can be used to hold sealing oil pipe tightly after changing rubber.Sucker rod annular preventer can be adopted during actuating oil-pumping unit, during lower oil tube, also can adopt oil pipe annular preventer；
S21, installs blowout prevention standpipe, enters tubing plug by steel wire operation equipment under in oil pipe on upper annular preventer top, blocks the bottom of first oil pipe on pump by tubing plug, then replaces with lower two annular preventer rubber；In this step, proofread plug depth, bleed off overbottom pressure in oil pipe, observe more than 2 hours, confirm to block after successfully, trip out steel wire and instrument；
S22, uses under workover rig and enters tubing nipple, and tubing nipple screw thread is connected by make-up with boll-weevil hanger, tubing nipple and upper annular preventer 1, lower annular preventer 5 slipper seal；
S23, the tubing nipple of screwed connection successively, boll-weevil hanger, oil pipe are upwards proposed, when box cupling survey meter 9 detects boll-weevil hanger and the box cupling of the close lower annular preventer 5 that moves upward, under hydraulic control, annular preventer 5 is opened, make boll-weevil hanger, box cupling through lower annular preventer 5, continue to lift up；When boll-weevil hanger, box cupling enter in casing nipple 2, under hydraulic control, annular preventer 5 cuts out and holds tubing seal tightly, open pressure release valve 10 and bleed off the gas-liquid in casing nipple 2, oil gas water is put in the ground tanks to work place, when pressure in casing nipple is zero, bleed off pressure end, turn off pressure release valve 10, open annular preventer 1, inside upper annular preventer 1, rubber opens, it is ensured that box cupling may pass through annular preventer 1；Continue to lift up and place pipe elevator.
In this step, box cupling is the box cupling between tubing nipple, boll-weevil hanger or the box cupling between boll-weevil hanger, oil pipe or the box cupling between oil pipe, pump or the box cupling between oil pipe, instrument or the box cupling between oil pipe, oil pipe；The present invention innovatively have employed the mode of upper and lower two annular preventers cooperation and trips out the bigger box cupling of external diameter, instrument, equipment, in the whole process pulling up flowline and box cupling, instrument, equipment, by upper annular preventer or lower annular preventer all the time alternately or the common annular space sealing oil pipe and sleeve pipe；
S24, re-uses workover rig and transfers tubing nipple and boll-weevil hanger, makes the box cupling of first oil pipe be seated on pipe elevator 4, lays down boll-weevil hanger；
S25, makes annular preventer seal annular space, the pressure release valve closing gate of casing nipple, opens lower annular preventer, lift up pipe elevator and play oil pipe；When box cupling survey meter detect next root tubing coupling cross lower annular preventer time, lower annular preventer seal annular space, pressure release valve is opened and is bled off pressure, and upper annular preventer opens；Having continued oil pipe, carried to enabling this tubing coupling to be seated on pipe elevator, laid pipe elevator, lower drain line makes box cupling be sitting on pipe elevator；Unload oil pipe and this root oil pipe is placed on oil pipe bridge；
S26, repeats step S25, trips out whole oil pipes on tubing plug top；
S27, when running into the oil pipe with blanking plug, upper annular preventer, lower annular preventer seal annular space simultaneously, the box cupling making oil pipe end pump is seated on built-in hydraulic elevator 4, back-off lays down the oil pipe with blanking plug, then lifts up oil pipe to casing nipple 2, makes triple ram preventer 3 sealing wellhead, annular preventer 1 is opened in hydraulic control, trips out the oil pipe with blanking plug；
S28, by entering the tubing nipple with plug valve under injection head, hydraulic control is closed and is closed annular preventer 1, now, sleeve pipe is sealed by the tubing nipple of slipper seal and upper annular preventer, open triple ram preventer 3, make-up makes the tubing nipple screwed connection pump housing with plug valve, open lower annular preventer, lifting up the pump housing makes the box cupling of the whole pump housing and next root oil pipe of the pump housing enter in casing nipple, lower annular preventer working seal annular space, transfer the pump housing, the tubing coupling making pump housing bottom is seated on built-in hydraulic elevator 4, back-off unloads lower pump body, lift up and make the pump housing enter in casing nipple, it is then shut off triple ram preventer 3, sealing wellhead, annular preventer is opened after bleeding off pressure, trip out the pump housing；The plug valve of the present invention is used for blocking tubing nipple.If there being bleeder on the pump housing, tubing plug is blocked on the oil pipe of first, bleeder top.Play bleeder method identical with playing pumping method.
S29, repeats step S21 to S28, trips out whole oil pipes and other instrument under pump；As, blowout prevention standpipe is installed, with blanking plug under steel wire operation equipment to the bottom remaining oil pipe on upper annular preventer top；Under workover rig, oil pipe and the oil pipe boil on the nape opposite the mouth on built-in hydraulic elevator, repeat S25 step, trip out residue oil pipe；If tubing string afterbody is with other instruments such as screen casings, including anchor, packer etc., construction method same S27, S28；
S3, completion, under enter oil pipe and pump operation.
Method one:
S31, when former pipe operation wellhead device is constant, blowout prevention standpipe is installed on upper annular preventer top, with entering casing blanking plug under Operation Tubing Aggregate to more than perforated interval 5 to 10 meters of closure sleeve pipes；
S32, at ambient pressure, enters oil pipe, pump, sucker rod under conventional method for well fixing.
S33, improves production tree, connects the flow process pipeline needed that recovers the oil, and injects natural gas, nitrogen or crude oil from annular space, is forced into setting pressure and opens casing blanking plug inner core and set up gas channel, carries out production of hydrocarbons.
Method two:
S31, after having played pump line post, wellhead assembly is constant.Under enter oil pipe and instrument, first oil pipe with blanking plug, with tubing injector head push go into the well.When the deadweight of oil pipe Yu instrument can overcome the upper top power of what oil pipe, instrument were produced by clips clamp force and down-hole pressure, directly string and instrument with workover rig.
S32, when pipe is to pump line post instantly, is sitting in oil pipe on built-in oil pipe elevator before lower pump, and lower annular preventer works, and closes triple ram preventer.Blowout prevention standpipe is installed, opens triple ram preventer, pull the blanking plug bottom oil pipe out with steel wire operation equipment.Close triple ram preventer, tear lubricator open, prepare lower pump.
S33, pump connects a tubing nipple, and this pipe nipple is with tubing plug.Pump and pipe nipple under injection head, the annular space of upper annular preventer canned pump or tubing nipple external diameter, open triple ram preventer, make-up normally plays oil pipe.
S34, under after complete oil pipe and instrument, boll-weevil hanger is sitting in four-way, tightens boll-weevil hanger jackscrew, tears all above equipment of four-way open, installs wellhead assembly, improves production tree.Steel wire operation equipment pulls the blanking plug on pump in pipe nipple out.
Lower piston, instrument and sucker rod, with to trip out piston, instrument, sucker rod method identical, are completed by upper and lower ring seal alternation.
Embodiment two:
The present embodiment is the workover treatment with pressure in gaslift flow string situation.Method has similar with the method in embodiment one.Entering the station or entering installation constant pressure valve 6 on gathering system pipeline, setting former Inlet pressure as constant pressure valve 6 operating pressure, when wellbore pressure exceedes this pressure, automatic leakage is pressed into gathering system.
S1, plays pipe step:
S11, installs constant pressure valve 6 entering the station on pipeline, install blowout prevention standpipe, open each gate successively and make instrument can pass through gate, wellhead assembly along oil pipe down to first gas lift valve top on topmost gate；Under steel wire operation equipment, tubing plug is to first gas lift valve top, closure gas lift valve top oil pipe；
S12, tear wellhead assembly open, four-way more than 8 install successively box cupling survey meter 9, lower annular preventer 5, built-in hydraulic elevator 4, triple ram preventer 3, casing nipple 2, on annular preventer 1, tubing injector head, injection head use condition: tubing weight≤set overpressure to oil pipe and instrument hermetic unit generation upper top power+seal friction resistance.
S13, with tubing nipple under workover rig, with boll-weevil hanger make-up, upper annular preventer seals tubing nipple, then lifts up.When on boll-weevil hanger and first oil pipe, box cupling is crossed on lower annular preventer 5, lower annular preventer 5 works, and seals first oil pipe external diameter.Pressure in casing nipple 2 is put to bin.Then unclamping annular preventer 1 rubber, continuing to lift up and taking pipe elevator to first tubing coupling, place pipe elevator, lower drain line makes box cupling be sitting on pipe elevator；Boll-weevil hanger shackle.
S14, upper annular preventer 1 works, seal oil pipe external diameter, close the pressure release valve 10 being connected with casing nipple 2, unclamp lower annular preventer 5, continue to lift up oil pipe, when lower annular preventer 5 is crossed in next root tubing coupling, lower annular preventer 5 works, sealed lower portion oil pipe external diameter, bleed off the pressure in casing nipple 2 to bin and ground tanks, unclamp annular preventer 1, continue to lift up oil pipe and can be sitting on pipe elevator to box cupling, place pipe elevator, lower drain line makes box cupling be sitting on pipe elevator, then shackle again.Trip out tubing plug all of the above oil pipe by that analogy.
S15, when box cupling survey meter detects tubing plug and built-in hydraulic elevator crossed by gas lift valve, triple ram preventer 3 enters in casing nipple 2, lower annular preventer 5 works, sealing first oil pipe outer ring space of below gas lift valve, upper annular preventer 1 seals the oil pipe external diameter having tubing plug in more than gas lift valve first；Built-in hydraulic elevator 4 blocks lower first oil pipe of gas lift valve, gas lift valve and first, top oil pipe back-off, is unloaded by gas lift valve together back-off；Lift up oil pipe to make triple ram preventer 3 can close full envelope to reach shut-in well purpose, close triple ram preventer 3, bleed off the pressure in casing nipple 2, unclamp annular preventer 1, play the gentle act valve of flowline；
S16, installs blowout prevention standpipe, bottom tubing plug under steel wire operation equipment to first, second gas lift valve top oil pipe on upper annular preventer 1 top；Bleed off oil overpressure, remove standpipe；Installing and with tubing nipple under tubing injector head, upper annular preventer seals this pipe nipple external diameter, opens triple ram preventer, this pipe nipple lower and the oil pipe make-up being sitting on built-in hydraulic elevator.Lift up tubing nipple and oil pipe；
S17, repeats above step, whole oil pipes and gas lift valve is tripped out, and closes triple ram preventer 3, shut-in well.
S2, lower gas lift string:
After tripping out gaslift flow string, box cupling survey meter 9, lower annular preventer 5, built-in oil pipe elevator 4, triple ram preventer 3, short sleeve 2, upper annular preventer 1, each portion of tubing injector head remain stationary as；Under the effect of injection head, lower first oil pipe with tubing plug, with oil pipe under two fuel ring pipe sealer alternations；When before last gas lift valve, tubing coupling is sitting on built-in elevator, closes triple ram preventer.Installing blowout prevention standpipe, bottommost tubing plug pulled out by steel wire operation car.Remove standpipe, with gas lift valve under injection head and the tubing nipple with blanking plug；Open triple ram preventer 3, make-up；Open built-in hydraulic elevator 4, continue with oil pipe under two fuel ring pipe sealer alternations；Before penultimate gas lift valve, tubing coupling is sitting on built-in elevator；Blowout prevention standpipe is installed, pulls the blanking plug in last gas lift valve top sub out, close three ram seal devices；Remove standpipe, with lower second gas lift valve of injection head and the tubing nipple with blanking plug；Open triple ram preventer 3, make-up；Open built-in hydraulic elevator 4, continue with oil pipe under two fuel ring pipe sealer alternations；Repeat above each step, by gas lift string and gas lift valve G.I.H；
S3: lower gaslift flow string:
Blowout prevention standpipe is installed, with Operation Tubing Aggregate delivery casing blanking plug to oil-gas Layer top circle 5-10 rice on upper annular preventer 1 top.Bleed off wellbore pressure, after observing blanking plug reliable operation, with gaslift flow string under conventional workover treatment method.After completion installs oil recovery christmas tree, annular space nitrogen or natural gas or crude oil are suppressed and are destroyed casing blanking plug inner core, set up production of hydrocarbons passage.
Embodiment three:
Some is similar for this enforcement and embodiment two, is distinctive in that: the present embodiment be in original production tubing string under enter the gas lift string that diameter is less.
S1, remove oil recovery christmas tree master valve apparatus above, install successively on master valve little four-way, lower annular preventer 5, triple ram preventer 3, casing nipple 2, on annular preventer 1, tubing injector head；Connect constant pressure valve and and set former Inlet pressure as constant pressure valve operating pressure on the pipeline that enters the station；
S2, with entering the gas lift string stifled with tail pipe under injection head, when oil pipe conducts oneself with dignity the upper top power and seal friction resistance that can overcome borehole pressure that tubing seal part is produced, uses oil pipe and instrument under workover rig.One special ball-and-seat of each gas lift valve top configuration, during lower pipe, this ball-and-seat upwards seals.Alternately seal to enter under gas lift string in oil pipe with upper and lower annular preventer；
S3, installs oil recovery christmas tree, is just suppressing with nitrogen or natural gas and is opening the ball-and-seat that each gas lift valve top is arranged from top to bottom successively, finally destroys the stifled inner core of tail pipe, sets up gas channel；
Flowing well, water injection well, sleeve pipe blowing produce change oil pipe blowing flow string with pump line post compared with simply.When removing the tubing string of the longer tools such as screw pump, equipment, the casing nipple 2 between upper annular preventer 1 and triple ram preventer 3 corresponding to lengthen.
It is below completion step:
Under all kinds Oil/gas Well after complete tubing string, annular preventer, built-in hydraulic elevator 4, box cupling survey meter 9, triple ram preventer 3, casing nipple, lower annular preventer 5, oil pumping rod of oil tube injection head, constant pressure valve 6 in dismounting.Oil recovery christmas tree, flow process of resuming production are installed.Sucker rod pump started shooting pumping produce, flowing well induced flow produce, continuous gas lift gas well gas lift produce.
The present invention adopts automation control system, box cupling survey meter 9, upper and lower annular preventer 5 is linked, and controls workover rig or oil pipe, sucker rod injection head operating rate, and hydraulic control system controls to hold tightly, unclamp stripper rubber simultaneously；Instantly, when annular preventer 5 is held tightly, automatic control system is opened sleeve pipe and is adjusted the pressure release valve 10 of pipe nipple, and pressure unclamps annular preventer 1 when being zero；Triple ram preventer 3 opens, close, shear tubing system independently controls, and is provided simultaneously with manual mode to ensure safety.
The ground tanks that the present invention adopts, volume is 1 side, connects into production gathering system by oil-gas mixed delivery pump pipeline, the liquid that short sleeve is released can be pumped into production gathering system at any time.
It should be noted that " back-off " of the present invention is construed as and opens screwed connection, " make-up " is construed as and carries out screwed connection, " slipper seal " be construed as between two parts seal and also can relative sliding.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and simple modifications etc. made in flesh and blood of the present invention, should be included within protection scope of the present invention.
Claims (10)
1. an oil gas field workover operation device with pressure, it is characterized in that, this device includes the constant pressure valve (6) being installed on the production flow line that enters the station (7), and four-way (8) top installs box cupling survey meter (9), lower annular preventer (5), built-in hydraulic elevator (4), triple ram preventer (3), casing nipple (2), upper annular preventer (1) successively；This device also includes hydraulic control cabinet, and hydraulic control cabinet is connected with built-in hydraulic elevator, triple ram preventer, upper annular preventer, lower annular preventer respectively.
2. oil gas field according to claim 1 workover operation device with pressure, it is characterised in that upper annular preventer top is also equipped with injection head, and injection head is connected with hydraulic control cabinet.
3. oil gas field according to claim 1 and 2 workover operation device with pressure, it is characterised in that casing nipple is connected with ground tanks by pipeline, and pipeline is provided with pressure release valve (10)；The constant pressure valve pressure set points being installed on the pipeline that enters the station is the former production pressure entered the station.
4. oil gas field according to claim 1 and 2 workover operation device with pressure, it is characterised in that hydraulic control cabinet is PLC control cabinet.
5. oil gas field according to claim 1 and 2 workover operation device with pressure, it is characterised in that the upper annular preventer of spray containment grease and the inner core of lower annular preventer are rubber automatically.
6. an oil gas field workover treatment method with pressure, it is characterised in that the method includes the steps,
S1, plays sucker rod, hollow bar operation:
S11, installs workover rig, installs constant pressure valve entering the station and arranges force value on production flow line, and back-off trips out polished rod, when box cupling is between polished rod sealer and master valve under polished rod, closes production tree master valve, trips out polished rod and polished rod sealer；By polished rod connected pipes blanking plug, under polished rod sealer sealing function, open master valve, enter polished rod under secondary and deliver first oil pipe top of tubing plug closure near boll-weevil hanger position, trip out polished rod and polished rod sealer；Remove four-way top production tree, then four-way top from bottom to top successively install box cupling survey meter, lower annular preventer, built-in hydraulic elevator, triple ram preventer, casing nipple, on annular preventer；
S12, enters polished rod band tubing plug fishing head under third time, pulls blanking plug out, more lower polished rod make-up makes polished rod and sucker rod screwed connection, polished rod and upper annular preventer slipper seal；
S13, pull up out the polished rod of screwed connection, sucker rod, box cupling survey meter detects that box cupling moves upward when lower annular preventer, hydraulic control cabinet controls lower annular preventer rubber and opens, makes box cupling cross lower annular preventer, hydraulic control cabinet controls lower annular preventer rubber and seals sucker rod, open pressure release valve, open annular preventer rubber, continue to lift up polished rod, sucker rod makes box cupling cross annular preventer and can be seated on rod elevator；
S14, transfers and makes first, polished rod bottom rod collar be sitting on rod elevator, and shackle trips out sucker rod；
S15, repeats step S12, S13, S14, trips out whole sucker rod and the instrument being connected with sucker rod, pump piston；
S2, plays oil pipe and pump operation.
7. oil gas field according to claim 6 workover treatment method with pressure, it is characterised in that in step S2, plays oil pipe and pump operation comprises the steps:
S21, enters tubing plug, the bottom of the oil pipe that closure is connected with pump housing top under in oil pipe；
S22, under enter tubing nipple, make-up is by tubing nipple and boll-weevil hanger screwed connection, tubing nipple and upper annular preventer, lower annular preventer slipper seal；
S23, the tubing nipple of screwed connection successively, boll-weevil hanger, oil pipe are upwards proposed, box cupling survey meter detects and moves upward when the boll-weevil hanger of lower annular preventer, box cupling, and hydraulic control cabinet controls lower annular preventer and opens, and makes boll-weevil hanger, the box cupling lower annular preventer of traverse；Continue to lift up, when boll-weevil hanger, box cupling enter in casing nipple, hydraulic control cabinet controls lower annular preventer and closes, and bleeds off the pressure in casing nipple, upper annular preventer is opened, and makes boll-weevil hanger, box cupling through upper annular preventer and can be seated on pipe elevator；
S24, transfers tubing nipple and boll-weevil hanger, makes the box cupling of first oil pipe be seated on pipe elevator, lays down boll-weevil hanger；
S25, under enter tubing nipple, tubing nipple is connected by make-up with oil pipe thread, makes annular preventer seal annular space, tubing nipple and upper annular preventer slipper seal, opens lower annular preventer, lift up oil pipe；When box cupling survey meter detect next root tubing coupling cross lower annular preventer time, lower annular preventer seal annular space, pressure release valve is opened, and upper annular preventer is opened；Continue oil pipe, carried to enabling this tubing coupling to be seated on pipe elevator, unload oil pipe；
S26, repeats step S25, trips out whole oil pipes on tubing plug top；
S27, when running into the oil pipe with blanking plug, upper annular preventer, lower annular preventer seal annular space simultaneously, and make the upper box cupling of the oil pipe end pump housing be seated on built-in hydraulic elevator, back-off lays down the oil pipe with blanking plug, then oil pipe is lifted up to casing nipple, triple ram preventer sealing wellhead；Opening after pressure release valve bleeds off pressure, hydraulic control cabinet controls to open annular preventer, trips out the oil pipe with blanking plug；
S28, by entering the tubing nipple with plug valve under injection head, hydraulic control cabinet controls pass and closes annular preventer, opens triple ram preventer, and make-up makes the tubing nipple screwed connection pump housing with plug valve；Open lower annular preventer, lift up the pump housing and make the box cupling of the whole pump housing and next root oil pipe of pump enter in casing nipple；Lower annular preventer working seal annular space；Transferring the pump housing, make the tubing coupling of pump housing bottom be seated on built-in hydraulic elevator, back-off unloads lower pump body, is then shut off triple ram preventer sealing wellhead, opens annular preventer and trip out the pump housing after bleeding off pressure；
S29, repeats step S21 to S28, trips out other instrument under whole oil pipe and pump.
8. oil gas field according to claim 7 workover treatment method with pressure, it is characterized in that, in step S13, box cupling is the box cupling between polished rod, sucker rod or the box cupling between sucker rod, piston or the box cupling between sucker rod, instrument or the box cupling between sucker rod, sucker rod；In step S23, box cupling is the box cupling between tubing nipple, boll-weevil hanger or the box cupling between boll-weevil hanger, oil pipe or the box cupling between oil pipe, oil pipe or the box cupling between oil pipe, the pump housing or the box cupling between oil pipe, instrument.
9. oil gas field according to claim 7 workover treatment method with pressure, it is characterized in that, in step S13, when box cupling enters in casing nipple, close lower annular preventer, open pressure release valve, oil gas water is put in the ground tanks to work place, after bleeding off pressure end, turn off pressure release valve, open annular preventer.
10. oil gas field according to claim 7 workover treatment method with pressure, it is characterised in that in step S11, will enter under the polished rod of screwed connection and sucker rod to bottommost, and back-off makes polished rod depart from sucker rod.
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| CN105952394A (en) * | 2016-06-21 | 2016-09-21 | 崔斌 | Special elevator structure for pressurized workover of oil-gas field |
| CN106639952A (en) * | 2016-11-10 | 2017-05-10 | 中国矿业大学 | Wellhead sealing device used for well drilling video detecting |
| CN109441402A (en) * | 2018-12-29 | 2019-03-08 | 韩咏利 | Can Operating Pressure clean method and device |
| CN111706291A (en) * | 2020-07-09 | 2020-09-25 | 刘建男 | Pipeline plugging device and well repairing method |
| CN112727394A (en) * | 2019-10-28 | 2021-04-30 | 中国石油化工股份有限公司 | Coiled tubing hydraulic workover string and method |
| CN113047795A (en) * | 2019-12-27 | 2021-06-29 | 中国石油天然气股份有限公司 | Method for pressing reducing oil pipe string |
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| CN113464081A (en) * | 2020-03-30 | 2021-10-01 | 中国石油化工股份有限公司 | Coal bed gas micro-strip pressure well repairing process |
| CN111706291A (en) * | 2020-07-09 | 2020-09-25 | 刘建男 | Pipeline plugging device and well repairing method |
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