CN113775319A - Flow-regulating electrodeless section filling technology tubular column and use method thereof - Google Patents
Flow-regulating electrodeless section filling technology tubular column and use method thereof Download PDFInfo
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- CN113775319A CN113775319A CN202111181674.2A CN202111181674A CN113775319A CN 113775319 A CN113775319 A CN 113775319A CN 202111181674 A CN202111181674 A CN 202111181674A CN 113775319 A CN113775319 A CN 113775319A
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- Prior art keywords
- sliding sleeve
- pipe
- filling
- packer
- service
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
Abstract
The invention relates to the technical field of oilfield downhole operation equipment, and particularly discloses a flow-regulating non-polar section filling technical pipe column which comprises a well completion pipe column and a service pipe column, wherein the well completion pipe column comprises a packer, a filling sliding sleeve, a water control sieve pipe, a segmented sliding sleeve and a filling tool which are sequentially connected from top to bottom; the filling sliding sleeve comprises a sliding sleeve main body and a sliding sleeve arranged on the sliding sleeve main body, a sliding sleeve flow channel is formed in the sliding sleeve main body, and the sliding sleeve flow channel is opened and closed through the sliding sleeve; the service pipe column comprises a flushing pipe, the bottom of the flushing pipe is connected with a filling service tool matched with the filling tool, and the upper end of the flushing pipe is provided with a sliding sleeve switch matched with the sliding sleeve; an annular upstream return flow channel is formed between the flushing pipe and the water control sieve pipe and between the flushing pipe and the segmented sliding sleeve, and a backwashing channel communicated with the upstream return flow channel is further formed in the packer. The sand control method is suitable for long-section or super-long-section wells with high water content and serious sand production, can realize effective sand control of the long-section or super-long-section wells, and can achieve the effect of long-term flow regulation and water control.
Description
Technical Field
The invention relates to the technical field of oil field downhole operation equipment, in particular to a flow-regulating non-polar section filling technology tubular column and a using method thereof.
Background
As the main heavy oil sand production oil fields of China fall into the middle and later development stages of development of various oil fields such as Liaohe, Jidong, Henan and Xinjiang, the water content of development wells of the oil fields rises rapidly, the water content of some blocks reaches over 95 percent, and the development effect of horizontal wells is seriously influenced.
The main reason that the water content mass fraction of the horizontal well screen sleeve completion well is fast increased is caused by local water breakthrough of the horizontal section, and the two main conditions are that firstly, because a certain flow pressure drop exists in the horizontal section along the flow direction, the production pressure difference of the root end of the horizontal section is larger than the pressure difference of the finger end, and then the root end of the water ridge at the lower part of the horizontal section is higher and lower, so that the local water breakthrough of the root end is caused.
Secondly, the edge water and the injected water locally burst into the water to cause the local water breakthrough in the production section. In order to reduce or control the water content of the horizontal well, prolong the production life of the horizontal well and ensure the stable production and high yield of the oil field, some effective measures are required to solve the problem of flow regulation of the oil well.
The existing extensive measure for solving the high water content of the oil field is to use a water control sieve tube, but for a well with serious sand production and a long horizontal section or an ultra-long horizontal section, when the water control sieve tube is used for filling operation, the problem that filling pressure is too high and filling operation has to be stopped in advance to cause incompact filling is often faced, so that the inventor wants to design a filling technology tubular column to solve the difficult problem of the filling technology in the well at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a flow-regulating non-polar section filling technology tubular column and a using method thereof, wherein the flow-regulating non-polar section filling technology tubular column is reasonable in structure, can be used for effectively preventing sand in a long well section or an ultra-long well section with high water content and serious sand production, and can achieve the effects of flow regulation and water control for a long time.
The technical scheme of the invention is as follows:
a flow-regulating stepless section filling technology tubular column comprises a well completion tubular column and a service tubular column, wherein the service tubular column is positioned in a cavity of the well completion tubular column;
the well completion pipe column comprises a packer, a filling sliding sleeve, a water control sieve pipe, a segmented sliding sleeve and a filling tool which are sequentially connected from top to bottom, wherein a filling opening is formed in the bottom of the filling tool;
the filling sliding sleeve comprises a sliding sleeve main body and a sliding sleeve arranged on the sliding sleeve main body, a sliding sleeve flow channel is formed in the sliding sleeve main body, and the sliding sleeve flow channel is opened and closed through the displacement of the sliding sleeve;
the service pipe column comprises a flushing pipe, the bottom of the flushing pipe is connected with a filling service tool matched with the filling tool, and the upper end of the flushing pipe is provided with a sliding sleeve switch matched with a sliding sleeve;
an annular upward return flow channel is formed between the flushing pipe and the water control sieve pipe and between the flushing pipe and the segmented sliding sleeve, and a backwashing channel communicated with the upward return flow channel is further formed in the packer.
Preferably, the water control screen pipe comprises a base pipe, a screen sleeve, an end ring, a valve seat and a water control valve sheet;
the end ring is sleeved on the outer wall of the base pipe, the screen sleeve is sleeved on the outer side of the base pipe, the top of the screen sleeve is fixedly connected with the end ring, an annular filtrate flow passage is formed between the screen sleeve and the base pipe, the top of the valve seat is connected to the bottom of the filtrate flow passage, a filtrate hole is formed in the valve seat, the water control valve piece is installed on the valve seat, the water inlet of the water control valve piece is communicated with the filtrate flow passage, and the water outlet of the water control valve piece is communicated with the filtrate hole.
Preferably, the segmented sliding sleeve comprises a piston ring, an outer sheath, a spring and a shunt pipe;
the two ends of the outer sheath are respectively connected with a connecting ring and a lower connector, the upper end in the cavity of the outer sheath is provided with a slot matched with the shunt pipe, the top of the shunt pipe is inserted into the slot, and the shunt pipe is fixed in the cavity of the outer sheath through the lower connector;
an annular piston cavity is formed between the outer sheath and the shunt pipe, the piston ring is connected in the piston cavity in a sliding and sealing mode, and the spring is located between the lower joint and the piston ring and placed in the piston cavity;
the top of the outer sheath is provided with a pressure relief flow passage communicated with the top of the piston cavity, and the shunt pipe is provided with a drainage hole corresponding to the position of the piston ring.
Preferably, the packer is a ball throwing packer.
Preferably, the filling service tool comprises a central tube and a guide head, wherein the guide head is connected to the bottom of the central tube.
A use method of a flow-regulating stepless section filling technology tubular column comprises the following steps:
(1) and (3) lowering a completion pipe string:
sequentially connecting the packer, the filling sliding sleeve, the water control sieve tube, the segmented sliding sleeve and the filling tool from top to bottom to form a well completion pipe string, and then slowly putting the well completion pipe string into the sleeve;
(2) a service pipe column is arranged:
connecting a filling service tool, a flushing pipe and a sliding sleeve switch into a service pipe column, and slowly descending the service pipe column into a well completion pipe column cavity after the service pipe column is connected with an oil pipe;
when the service pipe column is pressed down, the sliding sleeve is pushed to move by using the sliding sleeve switch, a filling sliding sleeve flow passage is opened, and meanwhile, a filling opening of a filling tool is opened by using a filling service tool;
(3) setting a packer:
pumping liquid into an oil pipe, wherein the liquid firstly passes through the oil pipe to the interior of the packer and then enters a sliding sleeve switch, then passes through a flushing pipe to reach a filling tool, enters the annular space between a pipe column and a casing pipe from a filling opening of the filling tool, then enters an upward return flow channel through a water control sieve pipe, finally returns out from a backwashing channel, stops pumping the liquid after the returned liquid is clean and has no oil stain, and then seats the packer;
(4) testing the seal of the packer:
and (3) pressing and checking the seal from the annular space between the packer and the casing, wherein the seal checking pressure is 10-15MPa, then lifting the pipe column for 5t, and verifying the setting capability of the packer.
(5) Circularly adding sand:
pumping liquid into the bottom of the well from a washing pipe, circulating the liquid after passing through an upward return flow channel, gradually increasing the pumping liquid discharge volume to 300-600L/min, observing the pressure change of a sleeve, controlling the circulating pressure to be 3-5MPa, and adding sand for circulating filling operation after the pressure is stable;
when the pressure of the sleeve reaches 10MPa, the segmented sliding sleeve is actively opened to release the pressure.
(6) Replacing:
stopping adding sand, continuing to pump into liquid, utilizing the liquid stream to carry the grit that is detained in the washpipe from the packing mouth and get into completion tubular column and sleeve pipe annular space in, reach the inside purpose of washing tubular column, prevent that the later stage from producing in the time of oil recovery in with the grit that is detained in the tubular column suction pump, cause the harm to the pump.
(7) And (5) pulling out the service pipe column.
Compared with the prior art, the invention has the following advantages:
the invention can realize extrusion filling, solves the problem of incompact filling caused by overhigh sand control pressure in the current water control screen pipe filling by adapting the segmented sliding sleeve through the pipe column, saves time and cost and greatly prolongs the oil extraction period.
The water control valve plates in the water control sieve tube can be selected and assembled with different specifications according to different conditions of oil content and water content at the bottom of a well, and the movement trend of the fluid is changed by utilizing the basic physical property difference of oil and water and utilizing different flow regulating valve plates to change several characteristics of a flow channel so as to improve the bottom water coning.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the upper half of FIG. 1;
FIG. 3 is a schematic view of the lower half of FIG. 1;
FIG. 4 is a schematic structural view of a segmented sliding sleeve;
FIG. 5 is a schematic view of a water control screen;
in the figure: 1. the packer comprises a packer, 2, a filling sliding sleeve, 3, a water control sieve tube, 4, a segmented sliding sleeve, 5, a filling tool, 6, a filling port, 7, an oil pipe, 8, a sleeve, 9, a backwashing channel, 10, a sliding sleeve switch, 11, a flushing pipe, 12, an upward flow channel, 13, a filling service tool, 131, a central pipe, 132, a guide head, 201, a sliding sleeve main body, 202, a sliding sleeve flow channel, 203, a sliding sleeve, 204, a wire-wound sieve sleeve, 301, a base pipe, 302, an end ring, 303, a valve seat, 304, a sieve sleeve, 305, a water control valve sheet, 306, a filtrate hole, 307, a filtrate flow channel, 401, a connecting ring, 402, a pressure relief flow channel, a piston ring, 404, a discharge hole, 405, an outer sheath, 406, a piston cavity, 407, a spring, 408, a shunt pipe, 409 and a lower joint.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
Example 1
Referring to fig. 1-5, a flow-regulated stepless packing technology string includes a completion string and a service string, the service string is located in a cavity of the completion string.
The well completion pipe column comprises a packer 1, a filling sliding sleeve 2, a water control sieve pipe 3, a segmented sliding sleeve 4 and a filling tool 5 which are sequentially connected from top to bottom, wherein the packer 1 is selected as a ball throwing type packer.
Wherein, the water control sieve tube 3 and the subsection sliding sleeve 4 can be continuously assembled into a plurality of groups according to the filling length.
The filling opening 6 is provided at the bottom of the filling tool 5, the filling service tool 13 comprises a central tube 131 and a guiding head 132, the guiding head 132 is connected to the bottom of the central tube 131, and the guiding head 132 is generally in a conical structure to facilitate guiding the filling service tool 13 into the filling tool 5.
The filling sliding sleeve 2 comprises a sliding sleeve main body 201 and a sliding sleeve 203 arranged on the sliding sleeve main body 201, wherein a screen can be arranged on the outer side of the sliding sleeve main body 201, and the screen can be a wire-wound screen, a self-cleaning hole-variable anti-blocking screen and the like.
The sliding sleeve main body 201 is provided with a sliding sleeve flow passage 202, the sliding sleeve flow passage 202 is opened and closed through displacement of the sliding sleeve 203, and pressure difference between the inside and the outside of the pipe column is balanced through the sliding sleeve flow passage 202, so that the problem of local high pressure is avoided.
The service pipe column comprises a wash pipe 11, the bottom of the wash pipe 11 is connected with a filling service tool 13 matched with the filling tool 5, and the upper end of the wash pipe 11 is provided with a sliding sleeve switch 10 matched with a sliding sleeve 203.
An annular upstream flow channel 12 is formed between the flushing pipe 11 and the water control sieve pipe 3 and between the flushing pipe 11 and the segmented sliding sleeve 4, and a backwashing channel 9 communicated with the upstream flow channel 12 is further formed on the packer 1.
Wherein, the sliding sleeve 203 can be opened or closed by the contact friction with the sliding sleeve switch 10, or an elastic component is arranged between the sliding sleeve 203 and the sliding sleeve main body 201, the sliding sleeve 203 is pushed downwards to open the sliding sleeve flow passage 202 by pressing down the sliding sleeve switch 10, and when the sliding sleeve switch 10 is upward, the sliding sleeve 203 is reset under the elastic action.
The structure of the sliding sleeve switch 10 may be a plurality of bosses surrounding the periphery of the washpipe 11 at intervals, or an annular boss with through holes, and the upward return channels 12 at the upper and lower ends of the sliding sleeve switch 10 are communicated through gaps or through holes between the bosses.
Example 2
In this embodiment, the water control screen 3 is further optimized on the basis of embodiment 1, specifically:
referring to fig. 5, the water control screen 3 includes a base pipe 301, a screen jacket 304, an end ring 302, a valve seat 303, and a water control valve disc 305.
The end ring 302 is sleeved on the outer wall of the base pipe 301, the screen sleeve 304 is sleeved on the outer side of the base pipe 301, the top of the screen sleeve 304 is fixedly connected with the end ring 302, and an annular filtrate flow passage 307 is formed between the screen sleeve 304 and the base pipe 301.
The top of the valve seat 303 is connected to the bottom of the filtrate flow channel 307, the water control valve piece 305 is installed on the valve seat 303, the water inlet of the water control valve piece 305 is communicated with the filtrate flow channel 307, and the water outlet of the water control valve piece 305 is communicated with the filtrate hole 306.
In addition, the water regulating and controlling valve plate 305 can be adapted to the water controlling valve plate on the anti-blocking water controlling sieve tube, which is disclosed by the patent number CN202022493955.9 of the company, so that the assembly of the invention is more flexible and convenient.
The water control valves can be divided into 3 structures according to different oil content and water content, the first internal part is designed in a branch flow line type, the friction resistance of oil is effectively reduced, and the water flow is lengthened;
the second type is provided with 4-6 water inlets which are all in streamline design, the resistance is small, the flow surface base is large, the liquid passing amount is large, and the device is suitable for wells with high oil content;
the third structure inlet runner is spirally wound, has longer length than the first two structures, has the longest flow of water and the largest friction resistance, and is suitable for wells with higher water content.
The water control valve plate 305 can be selected and assembled with different specifications according to different conditions of oil and water containing at the bottom of a well, and the movement trend of the fluid is changed by utilizing the basic physical property difference of oil and water and utilizing different flow regulating valve plates to change a plurality of characteristics of a flow channel so as to improve the coning of the bottom water.
Example 3
In this embodiment, the segmented sliding sleeve 4 is further optimized on the basis of embodiment 1 or embodiment 2, specifically:
referring to fig. 4, the segmented sliding sleeve 4 includes a piston ring 403, an outer sheath 405, a spring 407, and shunt tubes 408;
the two ends of the outer sheath 405 are respectively connected with a connecting ring 401 and a lower connector 409, the upper end in the cavity of the outer sheath 405 is provided with a slot matched with the shunt tube 408, the top of the shunt tube 408 is inserted into the slot, and the shunt tube 408 is fixed in the cavity of the outer sheath 405 through the lower connector 409.
An annular piston cavity 406 is formed between the outer sheath 405 and the shunt tube 408, the piston ring 403 is slidably and hermetically connected in the piston cavity 406, and the spring 407 is positioned between the lower joint 409 and the piston ring 403 and is placed in the piston cavity.
The top of the outer sheath 405 is provided with a pressure relief flow passage 402 communicated with the top of the piston cavity, and the shunt tube 408 is provided with a discharge hole 404 corresponding to the position of the piston ring 403.
When the water control sieve tube 3 is assembled with the segmented sliding sleeve 4, the bottom of the base tube 301 is in threaded connection with the top of the shunt tube 408, and the filtrate flow passage 307 is communicated with the pressure relief flow passage 402.
During normal filling operation, liquid flow enters the upstream flow channel 12 from the sieve sleeve 304, the filtrate flow channel 307 and the filtrate hole 306, when the pressure in the filtrate flow channel 307 exceeds 10Mpa, part of liquid flow directly enters the pressure relief flow channel 402 through the sieve sleeve 304 and the filtrate flow channel 307 and pushes the piston ring 403 to move, so that the vent hole 404 is opened, and active pressure relief is realized.
Example 4
The use method of the flow-regulating stepless section filling technology tubular column in the embodiment comprises the following specific steps:
the method comprises the following steps:
(1) and (3) lowering a completion pipe string:
the packer 1, the filling sliding sleeve 2, the water control sieve tube 3, the subsection sliding sleeve 4 and the filling tool 5 are sequentially connected from top to bottom to form a well completion pipe string, and then the well completion pipe string is slowly put into the casing 8 to the designed depth.
(2) A service pipe column is arranged:
and connecting the filling service tool 13, the flushing pipe 11 and the sliding sleeve switch 10 into a service pipe column, and slowly descending the service pipe column into the cavity of the well completion pipe column to the designed depth after the service pipe column is connected with the oil pipe 7.
Then, the service pipe column is pressed down, the sliding sleeve 203 is pushed by the sliding sleeve switch 10 to move, the filling sliding sleeve flow passage 202 is opened, and the filling opening 6 of the filling tool 5 is opened by the filling service tool 13.
(3) Setting a packer:
firstly, pumping liquid into a washing pipe 11, leading the liquid to reach a filling tool 5 through the washing pipe 11, entering an annular space between a well completion pipe column and a casing pipe 8 from a filling port 6, then entering an upward return flow passage 12 from a filtrate hole 306 of a water control sieve pipe 3, and finally returning the liquid out from a backwashing channel 9;
and stopping pumping the liquid until the returned liquid is clean and has no oil stain, then throwing steel balls into the packer 1, and when the steel balls fall onto a ball seat of the packer 1, pumping the liquid into the pipe column, performing step-type pressurization on the packer for 5MPa, 8MPa and 12MPa, stabilizing the pressure of each step for 3 minutes, and sealing the rubber sleeve of the packer 1 with the sleeve 8 through hydraulic action to finish seat sealing.
(4) Testing the seal of the packer:
and (3) pressing and checking the seal from the annular space between the packer 1 and the sleeve 8, wherein the seal checking pressure is 10-15MPa, then lifting the pipe column for 5t, checking the setting capability of the packer, and back washing the steel ball after no problem exists in the setting.
(5) Circularly adding sand:
pumping liquid into the bottom of the well from a washing pipe 11, circulating the liquid after passing through an upward return flow channel 12, gradually increasing the pumping liquid discharge volume to 300L-600L/min, observing the pressure change of a sleeve 8, controlling the circulating pressure to be 3-5MPa, and adding sand for circulating filling operation after the pressure is stable.
When sand is added circularly, the sand adding proportion is generally 5 to 10 percent, and the discharge capacity is controlled to be 300L/min.
When the pressure of the sleeve 8 reaches 10MPa, a part of liquid enters the upstream flow channel 12 from the filtrate hole 306 of the water control sieve tube 3, the other part of liquid enters the pressure relief flow channel 402 from the filtrate flow channel 307, then the piston ring 403 is pushed to move, the pressure relief hole is opened for pressure relief, then low-speed filling operation is performed, after the pressure of the sleeve 8 is reduced to be below 10MPa, the piston ring 403 closes the pressure relief hole under the action of the spring 407, and then the sand adding speed can be continuously improved, and rapid filling operation is performed.
(6) Replacing:
stopping adding sand, continuing to pump liquid, enabling the liquid flow to carry sand retained in the washpipe 11 into the annulus between the well completion pipe column and the casing pipe 8 from the filling port 6, achieving the purpose of cleaning the inside of the pipe column, and preventing the sand retained in the pipe column from being sucked into the pump to damage the pump during later-stage production and oil extraction.
(7) And (5) pulling out the service pipe column.
By the device and the filling method, extrusion filling can be realized, the pipe column is matched with the segmented sliding sleeve 4, the problem that the filling is not compact due to overhigh filling sand control pressure of the current water control screen pipe 3 is solved, time and cost are saved, and the oil extraction period is greatly prolonged.
Claims (6)
1. A flow-regulating stepless section filling technology tubular column is characterized in that: the system comprises a completion string and a service string, wherein the service string is positioned in a cavity of the completion string;
the well completion pipe column comprises a packer, a filling sliding sleeve, a water control sieve pipe, a segmented sliding sleeve and a filling tool which are sequentially connected from top to bottom, wherein a filling opening is formed in the bottom of the filling tool;
the filling sliding sleeve comprises a sliding sleeve main body and a sliding sleeve arranged on the sliding sleeve main body, a sliding sleeve flow channel is formed in the sliding sleeve main body, and the sliding sleeve flow channel is opened and closed through the displacement of the sliding sleeve;
the service pipe column comprises a flushing pipe, the bottom of the flushing pipe is connected with a filling service tool matched with the filling tool, and the upper end of the flushing pipe is provided with a sliding sleeve switch matched with a sliding sleeve;
an annular upward return flow channel is formed between the flushing pipe and the water control sieve pipe and between the flushing pipe and the segmented sliding sleeve, and a backwashing channel communicated with the upward return flow channel is further formed in the packer.
2. The flow-regulating stepless section filling technology tubular column as claimed in claim 1, is characterized in that: the water control sieve tube comprises a base tube, a sieve sleeve, an end ring, a valve seat and a water control valve sheet;
the end ring is sleeved on the outer wall of the base pipe, the screen sleeve is sleeved on the outer side of the base pipe, the top of the screen sleeve is fixedly connected with the end ring, an annular filtrate flow passage is formed between the screen sleeve and the base pipe, the top of the valve seat is connected to the bottom of the filtrate flow passage, a filtrate hole is formed in the valve seat, the water control valve piece is installed on the valve seat, the water inlet of the water control valve piece is communicated with the filtrate flow passage, and the water outlet of the water control valve piece is communicated with the filtrate hole.
3. The flow-regulating stepless section filling technology tubular column as claimed in claim 1, is characterized in that: the segmented sliding sleeve comprises a piston ring, an outer sheath, a spring and a shunt pipe;
the two ends of the outer sheath are respectively connected with a connecting ring and a lower connector, the upper end in the cavity of the outer sheath is provided with a slot matched with the shunt pipe, the top of the shunt pipe is inserted into the slot, and the shunt pipe is fixed in the cavity of the outer sheath through the lower connector;
an annular piston cavity is formed between the outer sheath and the shunt pipe, the piston ring is connected in the piston cavity in a sliding and sealing mode, and the spring is located between the lower joint and the piston ring and placed in the piston cavity;
the top of the outer sheath is provided with a pressure relief flow passage communicated with the top of the piston cavity, and the shunt pipe is provided with a drainage hole corresponding to the position of the piston ring.
4. The flow-regulating stepless section filling technology tubular column as claimed in claim 1, is characterized in that: the packer is a ball throwing type packer.
5. The flow-regulating stepless section filling technology tubular column as claimed in claim 1, is characterized in that: the filling service tool comprises a central tube and a guide head, wherein the guide head is connected to the bottom of the central tube.
6. The use method of the flow-regulating stepless section filling technology tubular column according to any one of claims 1-5, is characterized in that: the method comprises the following steps:
(1) and (3) lowering a completion pipe string:
sequentially connecting the packer, the filling sliding sleeve, the water control sieve tube, the segmented sliding sleeve and the filling tool from top to bottom to form a well completion pipe string, and then slowly putting the well completion pipe string into the sleeve;
(2) a service pipe column is arranged:
connecting a filling service tool, a flushing pipe and a sliding sleeve switch into a service pipe column, and slowly descending the service pipe column into a well completion pipe column cavity after the service pipe column is connected with an oil pipe;
when the service pipe column is pressed down, the sliding sleeve is pushed to move by using the sliding sleeve switch, a filling sliding sleeve flow passage is opened, and meanwhile, a filling opening of a filling tool is opened by using a filling service tool;
(3) setting a packer:
pumping liquid into an oil pipe, wherein the liquid firstly passes through the oil pipe to the interior of the packer and then enters a sliding sleeve switch, then passes through a flushing pipe to reach a filling tool, enters the annular space between a pipe column and a casing pipe from a filling opening of the filling tool, then enters an upward return flow channel through a water control sieve pipe, finally returns out from a backwashing channel, stops pumping the liquid after the returned liquid is clean and has no oil stain, and then seats the packer;
(4) testing the seal of the packer:
pressing and checking the seal from the annular space between the packer and the casing, wherein the seal checking pressure is 10-15MPa, then lifting the pipe column for 5t, and verifying the setting capability of the packer;
(5) circularly adding sand:
pumping liquid into the bottom of the well from a washing pipe, circulating the liquid after passing through an upward return flow channel, gradually increasing the pumping liquid discharge volume to 300-600L/min, observing the pressure change of a sleeve, controlling the circulating pressure to be 3-5MPa, and adding sand for circulating filling operation after the pressure is stable;
when the pressure of the sleeve reaches 10MPa, the segmented sliding sleeve is actively opened to release pressure;
(6) replacing:
stopping adding sand, continuing pumping liquid, and carrying the sand retained in the washpipe into the completion pipe column and the casing annulus from the filling port by using liquid flow to achieve the purpose of cleaning the interior of the pipe column and prevent the sand retained in the pipe column from being sucked into the pump to damage the pump during later production and oil extraction;
(7) and (5) pulling out the service pipe column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181674.2A CN113775319A (en) | 2021-10-11 | 2021-10-11 | Flow-regulating electrodeless section filling technology tubular column and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181674.2A CN113775319A (en) | 2021-10-11 | 2021-10-11 | Flow-regulating electrodeless section filling technology tubular column and use method thereof |
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| CN113775319A true CN113775319A (en) | 2021-12-10 |
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|---|---|---|---|
| CN202111181674.2A Pending CN113775319A (en) | 2021-10-11 | 2021-10-11 | Flow-regulating electrodeless section filling technology tubular column and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592813A (en) * | 2022-04-18 | 2022-06-07 | 大庆长垣能源科技有限公司 | Well washing device for screen pipe well completion |
-
2021
- 2021-10-11 CN CN202111181674.2A patent/CN113775319A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592813A (en) * | 2022-04-18 | 2022-06-07 | 大庆长垣能源科技有限公司 | Well washing device for screen pipe well completion |
| CN114592813B (en) * | 2022-04-18 | 2023-11-21 | 大庆长垣能源科技有限公司 | Well flushing device for screen pipe well completion |
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