CN109209257B - Full-well section pressurized construction operation device and construction process adopting same - Google Patents
Full-well section pressurized construction operation device and construction process adopting same Download PDFInfo
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- CN109209257B CN109209257B CN201811075822.0A CN201811075822A CN109209257B CN 109209257 B CN109209257 B CN 109209257B CN 201811075822 A CN201811075822 A CN 201811075822A CN 109209257 B CN109209257 B CN 109209257B
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- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 64
- 230000009182 swimming Effects 0.000 claims abstract description 55
- 230000008878 coupling Effects 0.000 claims description 86
- 238000010168 coupling process Methods 0.000 claims description 86
- 238000005859 coupling reaction Methods 0.000 claims description 86
- 238000007667 floating Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000010008 shearing Methods 0.000 claims description 10
- 210000002445 nipple Anatomy 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a full-well section pressurized construction operation device and a construction process adopting the device, wherein the device comprises an auxiliary function assembly, a main function assembly and a swimming function assembly which are sequentially arranged from bottom to top, the swimming function assembly is connected with a power lifting device with a pressurizing lifting function and is used for lifting or lowering the swimming function assembly, reliable sealing is realized between the swimming function assembly and the main function assembly, the main function assembly is in sealing connection with the auxiliary function assembly, and the lower end of the auxiliary function assembly is in sealing connection with a wellhead through a wellhead four-way joint. The invention also discloses a construction process adopting the device.
Description
Technical Field
The invention relates to an oil field oil-gas-water well under-pressure construction operation device and a construction process technology adopting the device, which are mainly used for the later maintenance and overhaul of the oil field oil-gas-water well under pressure.
Background
In the production process of oil and gas fields, the oil and gas well is to be overhauled and maintained regularly, and two schemes are generally adopted at present for the maintenance of the oil and gas well with pressure: one is to use the hydraulic well of the well killing, but will block the oil gas pipeline in the well after the well killing, although will be the oil gas well overhauls, but has caused the great influence to the output of the well after overhauling, this construction process has already been eliminated gradually; the other is that the under-pressure overhauling operation, the basic flow is to make the blanking plug to block the channel in the production pipe column, seal the annular space of the oil jacket by using the blowout preventer combination, finish overhauling in the construction equipment with the function of pressurizing and lifting, the characteristic of this scheme is that the blanking plug must carry on the effective blocking at the end of the production pipe column, but the actual production pipe column will be equipped with various downhole tools, the downhole tools basically have the phenomenon of reducing diameter, so it is basically difficult to realize the effective blocking of the end pipe column, the present process generally carries on the secondary blocking or carries on the blowout and robbing construction after lifting to the blanking plug, there are the question of safety and environmental pollution, so only apply to the water well generally, this construction process can't meet the site operation requirement for the oil and gas well.
The present invention has been made in order to overcome the above-mentioned drawbacks, and an advantageous improvement is made.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a full-well section pressurized construction device and a construction process adopting the device.
The following technical scheme is adopted to achieve the aim of the invention:
the utility model provides a full well section area presses construction operation device which characterized in that: the device comprises an auxiliary function assembly, a main function assembly and a swimming function assembly which are sequentially arranged from bottom to top, wherein the swimming function assembly is connected with a power lifting device with a pressurizing lifting function and is used for lifting or lowering the swimming function assembly, reliable sealing is realized between the swimming function assembly and the main function assembly, the main function assembly is in sealing connection with the auxiliary function assembly, and the lower end of the auxiliary function assembly is in sealing connection with a wellhead through a wellhead four-way joint;
further, the main function assembly comprises a hollow telescopic pipe, an upper coupling detector, an upper slip, an upper half seal, an upper full seal, a top half seal and a closed half seal which are arranged from bottom to top, all parts of the main function assembly are connected in a sealing manner from top to bottom, and the vertical distance between the upper half seal and the upper full seal is larger than the length of a pipe column coupling;
further, the auxiliary function assembly comprises a lower coupling detector, a safety full seal, a safety half seal, a safety slip, a shearing full seal, a lower half seal and a lower slip which are arranged from bottom to top, and all parts of the auxiliary function assembly are connected in a sealing manner from top to bottom, wherein the shearing full seal is used for shearing an oil gas pipe column and sealing the pressure in an oil gas well when an unexpected situation occurs so as to prevent dangerous situations such as blowout of the oil gas well;
further, the swimming function assembly comprises a swimming half seal, a swimming slip and a sealing pipe, and reliable sealing is realized between the swimming half seal and the sealing half seal;
further, a hydraulic clamp for oil well pipe column shackle is arranged between the swimming function assembly and the main function assembly and is used for shackle a coupling between the upper half seal and the upper full seal;
furthermore, the hollow telescopic pipe is a hollow power telescopic pipe which is provided with hydraulic power and can be controlled through hydraulic pressure, and the hollow telescopic pipe is matched with the upper slips and the lower slips to realize the lifting of the pipe column.
A construction process adopting the full-well section pressurized construction operation device comprises the following steps:
step 1: preparation of the pipe column before lifting: temporarily blocking an inner hole of the hanger by adopting a mechanical plugging device or a chemical plugging agent, dismantling a wellhead production tree or a gas production tree, and installing the full-well section pressurized construction operation device on a wellhead four-way joint;
step 2: lifting hanger: the method comprises the steps of (1) closing an upper half seal after the nipple is connected with a hanger in a buckling manner through a nipple below an inner cavity of a main functional assembly and an auxiliary functional assembly, lifting the hanger through the nipple, closing a lower half seal when the hanger is lifted to the lower part of the upper half seal, simultaneously opening the upper half seal, continuously lifting the hanger, unloading the nipple through a hydraulic clamp after the hanger is lifted from the upper end of the main functional assembly, lowering the swimming functional assembly through a power lifting device until the hanger extends into a sealing pipe and is positioned above the swimming slips, closing the swimming slips and the swimming half seal after reliable sealing is formed between the swimming half seal and the sealing half seal in the sealing pipe, and opening the upper half seal, wherein the power lifting device drives the swimming functional assembly to lift the pipe column;
step 3: lifting the first and second pipe strings: in the process that the power lifting device drives the swimming function combination body to lift the pipe column, when a coupling between the first pipe column and the second pipe column reaches the position of a lower coupling detector, the lower coupling detector detects the coupling and sends out a pulse signal, and at the moment, the upper half seal is closed and the lower half seal is opened by sequential operation; the pipe column continues to ascend, when the coupling reaches the position of the upper coupling detector, the upper coupling detector detects the coupling and sends out a pulse signal, and at the moment, the lower half seal is closed and the upper half seal is opened in sequence; when the coupling passes through the upper half seal, closing the upper half seal, stopping the lifting action of the pipe column, enabling the coupling to stay between the upper half seal and the upper full seal, then operating the upper slip to clamp, closing the top half seal, and opening the traveling slip;
step 4: the coupling shackle and proposes an upper tubular column: rotating the first pipe column by using a hydraulic clamp, breaking out the coupling between the upper half seal and the upper full seal, closing the traveling slips after breaking out is completed, at the moment, clamping the second pipe column by the upper slips, starting the power lifting device, slowly lifting the first pipe column, closing the upper full seal after the tail end of the first pipe column passes through the upper full seal, opening the top half seal, continuously lifting the first pipe column to lift the pipe column, and sequentially placing the lifted pipe column to an oil pipe seat;
step 5: constructing a sealing cavity and sending an upper end hoop of a second pipe column into the sealing pipe: starting a power lifting device to lower the swimming function assembly into the main function assembly, closing the airtight semi-seal, opening the upper full seal after effective sealing is formed between the swimming function assembly and the main function assembly, and operating the hollow telescopic pipe when the upper slip is in a clamping state, so that the hollow telescopic pipe is extended to the full stroke of the hollow telescopic pipe along with the pipe column; sequentially operating the lower slips to close, operating the hollow telescopic pipe to retract after the upper slips are opened, simultaneously, enabling the swimming function combination body to follow the descending, and feeding the upper end joint hoop of the second pipe column into the sealing pipe;
step 6: lifting pipe column: sequentially closing the floating semi-seal, the floating slip and the upper semi-seal, opening the lower semi-seal at the same time, and lifting the floating functional assembly by the power lifting device to slowly lift the pipe column, wherein the pipe column can be lifted in place at one time or in a repeated lifting mode in the lifting process of the pipe column; when the lifting mode is adopted for multiple times, after the pipe column is lifted to a certain height, the upper slips are sequentially closed, the movable slips are opened, at the moment, the movable semi-seal and the upper semi-seal are in a closed state, the movable functional assembly is operated to descend, then the movable slips are sequentially closed, the upper slips are sequentially opened, the pipe column is lifted again, and the problem of stability of a compression rod does not exist due to the fact that the upper end and the lower end of the pipe column are stressed consistently in the lifting process, and lateral bending of an oil pipe is avoided;
step 7: lifting a tubular column: operating the power lifting device to enable the pipe column to continue lifting, when a coupling passes through the lower coupling detector, the lower coupling detector can detect the coupling and send out a signal, when the coupling passes through the lower half seal, closing the lower half seal, continuing lifting the pipe column upwards, when the upper coupling detector detects the coupling and sends out a pulse signal, opening the upper half seal, after the coupling passes through the upper half seal, closing the upper half seal, simultaneously stopping the lifting action of the pipe column, enabling the coupling to stay between the upper half seal and the upper full seal, then operating the upper slips to clamp, and closing the top half seal;
step 8: sequentially repeating the step 4, the step 5, the step 6 and the step 7, and closing the safety full seal after the complete well Duan Guanzhu is lifted;
step 9: and (3) running the pipe column: after the well tool is installed on the last pipe column, the pipe column is clamped by a traveling slip in the traveling function assembly, the tail end of the pipe column is lowered onto the safety half seal, at the moment, the upper half seal is closed, the safety full seal is opened, the pipe column is enabled to descend, when the upper coupling of the pipe column is lowered onto the upper half seal, the lower half seal is closed, the upper half seal is opened, the coupling is poured into, then the pipe column continues to descend, when the coupling descends onto the lower half seal, the upper half seal is closed, the lower half seal is opened, and the whole pipe column is poured into, and the well completion is completed sequentially.
The invention has the beneficial effects that: compared with the prior art, the invention has the remarkable effects that: according to the invention, the combination of the swimming function combination body and the main function combination body is utilized to complete the construction of the whole well section in the construction process under pressure, a blanking plug can not be put in, and meanwhile, the conditions of scaling diameter reduction, diameter reduction of tools in the well and the like of an inner pipe column of the well can be avoided, so that the real construction of the whole well section under pressure is realized; an upper half seal, an upper full seal and a top half seal in the main function combination body are matched with a hydraulic clamp to realize the functions of pipe column shackle and well pressure partition in a closed space; the swimming semi-seal, swimming slip and sealing pipe combination in the swimming assembly can seal the inner hole of the pipe column, can accommodate the whole pipe column or the pipe column with limited length, has consistent stress at the top end and the tail end of the pipe column, is not stressed, avoids the problem of stable compression bar, can lift or press one pipe column at a time, greatly improves the construction efficiency.
Drawings
FIG. 1 is a schematic structural view of an all-well section pressurized construction operation device of the invention;
reference numerals: 1. a wellhead four-way joint; 2. a lower coupling detector; 3. safety full sealing; 4. safety semi-sealing; 5. a safety slip; 6. shearing and fully sealing; 7. a lower half seal; 8. a lower slip; 9. a hollow telescopic tube; 10. a coupling detector is arranged; 11. an upper slip; 12. an upper half seal; 13. sealing completely; 14. top half sealing; 15. sealing and semi-sealing; 16. semi-sealing; 17. a traveling slip; 18. sealing the tube.
Detailed Description
The invention is further described below with reference to the drawings and examples.
The whole structure of the embodiment of the invention is shown by referring to fig. 1, and the whole structure of the whole well section pressurized construction operation device comprises a secondary function assembly, a main function assembly and a traveling function assembly which are sequentially arranged from bottom to top, wherein the main function assembly comprises a hollow telescopic pipe 9, an upper coupling detector 10, an upper slip 11, an upper half seal 12, an upper full seal 13, a top half seal 14 and a closed half seal 15 which are arranged from bottom to top, all parts of the main function assembly are connected in a sealing way, and the vertical distance between the upper half seal 12 and the upper full seal 13 is larger than the length of a pipe column coupling, wherein in the embodiment, the hollow telescopic pipe 9 is a hollow power telescopic pipe which is provided with hydraulic power and can be controlled through hydraulic pressure, the hollow telescopic pipe can be matched with the upper slip 11 and the lower slip 8, required equipment can be simplified by adopting the hollow power telescopic pipe, and pressurized construction can be realized by only matching one mast with the traveling assembly. In the field of oil field operation under pressure, the hollow power telescopic pipe can be used for hollow hydraulic telescopic pipes (rods) and other parts; if the hollow telescopic tube adopts a mode without self-power, the hollow telescopic tube can also be matched with a swimming function assembly to complete corresponding functions.
The auxiliary function combination comprises a lower coupling detector 2, a safety full seal 3, a safety half seal 4, a safety slip 5, a shearing full seal 6, a lower half seal 7 and a lower slip 8 which are arranged from bottom to top, wherein the shearing full seal 6 is used for shearing an oil gas pipe column and sealing the pressure in an oil gas well when an unexpected situation occurs so as to prevent dangerous situations such as oil gas blowout; the movable functional combination comprises a movable half-seal 16, a movable slip 17 and a sealing tube 18, wherein reliable sealing is realized between the movable half-seal 16 and the airtight half-seal 15. The swimming function combination is connected with a power lifting device with a pressurizing lifting function, and is used for lifting or lowering the swimming function combination, reliable sealing is achieved between the swimming function combination and the main function combination, the main function combination is in sealing connection with the auxiliary function combination, and the lower end of the auxiliary function combination is in sealing connection with a wellhead through a wellhead four-way joint 1. The auxiliary function combination body and the main function combination body can be combined into a large whole body, the sealing of the top end of the pipe string and the lower part of the pipe string is realized by matching the movable half seal 16 and the upper half seal 12, further, the full-well section sealing of the pipe string is realized, the top end and the lower part of the pipe string are stressed consistently during the process, the problem of pressure lever stability is avoided, and the pipe string can be lifted or pressed down at one time.
A hydraulic clamp for breaking out the oil well pipe column is arranged between the traveling function assembly and the main function assembly and is used for breaking out the coupling between the upper half seal 12 and the upper full seal 13.
In the technical scheme, each semi-sealing component, each full-sealing component, the hydraulic clamp, the hollow telescopic pipe and the like can be hydraulically driven, the remote PLC controller for transmitting signals detected by the upper coupling detector 10, the lower coupling detector 2 and the like can be used for controlling the automatic opening and closing of each executing element such as the semi-sealing, the full-sealing, the hollow telescopic pipe, the hydraulic clamp and the like through the opening and closing of the electromagnetic valve according to the process flow condition, so that the remote control is realized, the construction risk is reduced, and the safety of operators is ensured. For those skilled in the art, other control modes such as a singlechip, an ARM and the like can be adopted to realize remote control.
The invention combines the prior industrial technology, the configuration sensor has the advantages of automation and intellectualization potential, higher safety, capability of lifting and pressing the whole pipe column at one time, capability of realizing sectional pressurization on the pipe column, adoption of network electricity for power, low carbon and environmental protection.
The construction process adopting the full-well section pressurized construction operation device comprises the following steps:
step 1: preparation of the pipe column before lifting: temporarily blocking an inner hole of the hanger by adopting a mechanical plugging device or a chemical plugging agent, dismantling a wellhead production tree or a gas production tree, and installing a full-well section pressurized construction operation device on the wellhead four-way joint 1;
step 2: lifting hanger: the lower half seal 7 is closed, the upper half seal 12 is opened, the hanger is lifted up continuously after the lower half seal 12 is closed, the hanger is lifted up, the floating functional assembly is lifted down through the hydraulic pliers until the hanger extends into the sealing pipe 18 and is positioned above the floating slips 17, the floating slips 17 and the floating half seal 16 are closed after reliable sealing is formed between the floating half seal 16 and the sealing half seal 15 in the sealing pipe 18, the upper half seal 12 is opened, and the power lifting device drives the floating functional assembly to lift the pipe column;
step 3: lifting the first and second pipe strings: in the process that the power lifting device drives the swimming function combination body to lift the pipe column, when a coupling between the first pipe column and the second pipe column reaches the position 2 of the lower coupling detector, the lower coupling detector 2 detects the coupling and sends out a pulse signal, and at the moment, the upper half seal 12 is closed and the lower half seal 7 is opened by sequential operation; the pipe column continues to ascend, when the coupling reaches the position of the upper coupling detector 10, the upper coupling detector 10 detects the coupling and sends out a pulse signal, and at the moment, the lower half seal 7 is closed and the upper half seal 12 is opened in sequence; when the coupling passes through the upper half seal 12, closing the upper half seal 12, stopping the lifting action of the pipe column, enabling the coupling to stay between the upper half seal 12 and the upper full seal 13, then operating the upper slips 11 to clamp, closing the top half seal 14, and opening the traveling slips 17;
step 4: the coupling shackle and proposes an upper tubular column: rotating the first pipe column by using a hydraulic clamp, breaking out the coupling between the upper half seal 12 and the upper full seal 13, closing the traveling slips 17 after breaking out is completed, clamping the second pipe column by the upper slips 11, starting the power lifting device to slowly lift the first pipe column, closing the upper full seal 13 after the tail end of the first pipe column passes through the upper full seal 13, opening the top half seal 14, lifting the first pipe column continuously to lift the pipe column, and sequentially placing the lifted pipe column to an oil pipe seat;
step 5: build a seal chamber and send the upper end collar of the second string into the seal tube 18: starting a power lifting device to lower the swimming function assembly into the main function assembly, closing the airtight semi-seal 15, opening the upper full seal 13 after effective sealing is formed between the swimming function assembly and the main function assembly, and operating the hollow telescopic pipe 9 when the upper slips 11 are in a clamping state at the moment, so that the hollow telescopic pipe 9 is extended to the full stroke of the hollow telescopic pipe 9 along with a pipe column; sequentially operating the lower slips 8 to be closed, operating the hollow telescopic pipe 9 to retract after the upper slips 11 are opened, simultaneously moving the functional assembly to follow the descending, and feeding the upper end joint hoop of the second pipe column into the sealing pipe 18;
step 6: lifting pipe column: the swimming semi-seal 16, the swimming slips 17 and the upper semi-seal 12 are closed in sequence, the lower semi-seal 7 is opened at the same time, and the power lifting device lifts the swimming function combination body to enable the pipe column to be lifted slowly, and the pipe column can be lifted in place at one time or in a repeated lifting mode in the lifting process of the pipe column; when the lifting mode is adopted for multiple times, after the pipe column is lifted to a certain height, the upper slips 11 are sequentially closed, the traveling slips 17 are opened, at the moment, the traveling semi-seal 16 and the upper semi-seal 12 are in a closed state, the traveling function combination body is operated to descend, then the traveling slips 17 are sequentially closed, the upper slips 11 are opened, the pipe column is lifted again, and in the lifting process, the stress of the upper end and the lower end of the pipe column is consistent, the stability problem of a compression rod does not exist, and the lateral bending of the oil pipe is avoided;
step 7: lifting a tubular column: the power lifting device is operated to enable the pipe column to continue lifting, when a coupling passes through the lower coupling detector 2, the lower coupling detector 2 detects the coupling and sends out a signal, after the coupling passes through the lower half seal 7, the lower half seal 7 is closed, the pipe column continues lifting upwards, after the upper coupling detector 10 detects the coupling and sends out a pulse signal, the upper half seal 12 is opened, after the coupling passes through the upper half seal 12, the upper half seal 12 is closed, meanwhile, the pipe column lifting action is stopped, the coupling stays between the upper half seal 12 and the upper full seal 13, then the upper slips 11 are operated to clamp, and the top half seal 14 is closed;
step 8: sequentially repeating the step 4, the step 5, the step 6 and the step 7, and closing the safety total seal 3 after the complete well Duan Guanzhu is lifted;
step 9: and (3) running the pipe column: after the well tool is installed on the last pipe column, the pipe column is tightly clamped by a traveling slip 17 in the traveling function assembly, the tail end of the pipe column is lowered onto the safety half seal 4, at the moment, the upper half seal 12 is closed, the safety full seal 3 is opened, the pipe column is lowered, when the upper coupling of the pipe column is lowered onto the upper half seal 12, the lower half seal 7 is closed, the upper half seal 12 is opened, the coupling is poured into, then the pipe column continues to be lowered, when the coupling is lowered onto the lower half seal 7, the upper half seal 12 is closed, the lower half seal 7 is opened, and the whole pipe column is poured into, and the well completion is completed sequentially
The above-described embodiment represents only one embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (3)
1. The utility model provides a full well section area presses construction operation device which characterized in that: the device comprises an auxiliary function assembly, a main function assembly and a swimming function assembly which are sequentially arranged from bottom to top, wherein the swimming function assembly is connected with a power lifting device with a pressurizing lifting function and is used for lifting or lowering the swimming function assembly, reliable sealing is realized between the swimming function assembly and the main function assembly, the main function assembly is in sealing connection with the auxiliary function assembly, and the lower end of the auxiliary function assembly is in sealing connection with a wellhead through a wellhead four-way joint;
the main function assembly comprises a hollow telescopic pipe, an upper coupling detector, an upper slip, an upper half seal, an upper full seal, a top half seal and a closed half seal which are arranged from bottom to top, all parts of the main function assembly are connected in a sealing manner from top to bottom, and the vertical distance between the upper half seal and the upper full seal is larger than the length of a pipe column coupling;
the auxiliary function assembly comprises a lower coupling detector, a safety full seal, a safety half seal, a safety slip, a shearing full seal, a lower half seal and a lower slip which are arranged from bottom to top, and all parts of the auxiliary function assembly are connected in a sealing manner from top to bottom, wherein the shearing full seal is used for shearing an oil gas pipe column and sealing the pressure in an oil gas well when an unexpected situation occurs so as to prevent dangerous situations such as oil gas blowout;
the swimming function assembly comprises a swimming half seal, a swimming slip and a sealing pipe, and reliable sealing is realized between the swimming half seal and the sealing half seal.
2. The full wellbore section pressurized construction work device according to claim 1, wherein: the hollow telescopic pipe is a hollow power telescopic pipe with hydraulic power and capable of being controlled through hydraulic pressure, and the hollow telescopic pipe, the upper slips and the lower slips are matched to achieve lifting of the pipe column.
3. A construction process using the full-well section pressurized construction operation device according to any one of claims 1 to 2, characterized in that: the process comprises the following steps:
step 1: temporarily blocking an inner hole of the hanger by adopting a mechanical plugging device or a chemical plugging agent, dismantling a wellhead production tree or a gas production tree, and installing the full-well section pressurized construction operation device on a wellhead four-way joint;
step 2: the method comprises the steps of (1) closing an upper half seal after the nipple is connected with a hanger in a buckling manner through a nipple below an inner cavity of a main functional assembly and an auxiliary functional assembly, lifting the hanger through the nipple, closing a lower half seal when the hanger is lifted to the lower part of the upper half seal, simultaneously opening the upper half seal, continuously lifting the hanger, unloading the nipple through a hydraulic clamp after the hanger is lifted from the upper end of the main functional assembly, lowering the swimming functional assembly through a power lifting device until the hanger extends into a sealing pipe and is positioned above the swimming slips, closing the swimming slips and the swimming half seal after reliable sealing is formed between the swimming half seal and the sealing half seal in the sealing pipe, and opening the upper half seal, wherein the power lifting device drives the swimming functional assembly to lift the pipe column;
step 3: in the process that the power lifting device drives the swimming function combination body to lift the pipe column, when a coupling between the first pipe column and the second pipe column reaches the position of a lower coupling detector, the lower coupling detector receives a pulse signal sent by the coupling, and at the moment, the upper half seal is closed and the lower half seal is opened by sequential operation; the pipe column continues to ascend, when the coupling reaches the position of the upper coupling detector, the upper coupling detector receives a pulse signal sent by the coupling, and at the moment, the lower half seal is closed and the upper half seal is opened in sequence; when the coupling passes through the upper half seal, closing the upper half seal, stopping the lifting action of the pipe column, enabling the coupling to stay between the upper half seal and the upper full seal, then operating the upper slip to clamp, closing the top half seal, and opening the traveling slip;
step 4: rotating the first pipe column by using a hydraulic clamp, breaking out the coupling between the upper half seal and the upper full seal, closing the traveling slips after breaking out is completed, at the moment, clamping the second pipe column by the upper slips, starting the power lifting device, slowly lifting the first pipe column, closing the upper full seal after the tail end of the first pipe column passes through the upper full seal, opening the top half seal, continuously lifting the first pipe column to lift the pipe column, and sequentially placing the lifted pipe column to an oil pipe seat;
step 5: starting a power lifting device to lower the swimming function assembly into the main function assembly, closing the airtight semi-seal, opening the upper full seal after effective sealing is formed between the swimming function assembly and the main function assembly, and operating the hollow telescopic pipe when the upper slip is in a clamping state, so that the hollow telescopic pipe is extended to the full stroke of the hollow telescopic pipe along with the pipe column; sequentially operating the lower slips to close, operating the hollow telescopic pipe to retract after the upper slips are opened, simultaneously, enabling the swimming function combination body to follow the descending, and feeding the upper end joint hoop of the second pipe column into the sealing pipe;
step 6: sequentially closing the floating semi-seal, the floating slip and the upper semi-seal, opening the lower semi-seal at the same time, and lifting the floating functional assembly by the power lifting device to slowly lift the pipe column, wherein the pipe column can be lifted in place at one time or in a repeated lifting mode in the lifting process of the pipe column; when the lifting mode is adopted for multiple times, after the pipe column is lifted to a certain height, the upper slips are sequentially closed, the movable slips are opened, at the moment, the movable semi-seal and the upper semi-seal are in a closed state, the movable functional assembly is operated to descend, then the movable slips are sequentially closed, the upper slips are sequentially opened, the pipe column is lifted again, and the problem of stability of a compression rod does not exist due to the fact that the upper end and the lower end of the pipe column are stressed consistently in the lifting process, and lateral bending of an oil pipe is avoided;
step 7: operating the power lifting device to enable the pipe column to continue to lift, when a coupling passes through the lower coupling detector, the lower coupling detector can receive a signal sent by the coupling, when the coupling passes through the lower half seal, the lower half seal is closed, the pipe column continues to lift upwards, when the upper coupling detector receives the signal of the coupling, the upper half seal is opened, when the coupling passes through the upper half seal, the upper half seal is closed, meanwhile, the pipe column lifting action is stopped, the coupling stays between the upper half seal and the upper full seal, then the upper slips are operated to clamp, and the top half seal is closed;
step 8: sequentially repeating the step 4, the step 5, the step 6 and the step 7, and closing the safety full seal after the complete well Duan Guanzhu is lifted;
step 9: after the well tool is installed on the last pipe column, the pipe column is clamped by a traveling slip in the traveling function assembly, the tail end of the pipe column is lowered onto the safety half seal, at the moment, the upper half seal is closed, the safety full seal is opened, the pipe column is enabled to descend, when the upper coupling of the pipe column is lowered onto the upper half seal, the lower half seal is closed, the upper half seal is opened, the coupling is poured into, then the pipe column continues to descend, when the coupling descends onto the lower half seal, the upper half seal is closed, the lower half seal is opened, and the whole pipe column is poured into, and the well completion is completed sequentially.
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