CN116717203A - Horizontal well sand discharging device and use method - Google Patents
Horizontal well sand discharging device and use method Download PDFInfo
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- CN116717203A CN116717203A CN202310996309.XA CN202310996309A CN116717203A CN 116717203 A CN116717203 A CN 116717203A CN 202310996309 A CN202310996309 A CN 202310996309A CN 116717203 A CN116717203 A CN 116717203A
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- 239000004576 sand Substances 0.000 title claims abstract description 228
- 238000007599 discharging Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005086 pumping Methods 0.000 claims abstract description 38
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 63
- 210000001503 joint Anatomy 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 16
- 238000007667 floating Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 239000003129 oil well Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to the field of oil exploitation, in particular to a horizontal well sand discharging device and a using method thereof. The technical proposal is as follows: the efficient sand discharge circulating pipe column assembly comprises a double-circulation faucet, a double-circulation valve, a high-pressure plug, a low-pressure plug, an underground power pump, an underground lifting screw pump assembly, a negative pressure sand pump, a sand pump pipe, a sand mixer and a sand suction nozzle. The beneficial effects are that: according to the invention, the single oil pipe can be connected without stopping the pump, so that the continuous negative pressure sand pumping effect without stopping the pump is realized; the high-low pressure circulation system can realize one-key operation and switch an inlet and an outlet; a bypass channel is arranged on the underground power pump, so that the circulation of power fluid in the pipe column can be realized; valves in the high-pressure circulating system and the low-pressure circulating system adopt an integrated assembly structure, can be used by connection, are not required to be assembled on site, and reduce site installation procedures.
Description
Technical Field
The invention relates to the field of oil exploitation, in particular to a horizontal well sand discharging device and a using method thereof.
Background
At present, the completion mode of the horizontal well is mostly open hole or screen pipe completion, because the output is influenced after sand is discharged from the horizontal well Duan Jiaochang, the sand flushing difficulty of the horizontal well is high, especially the sand discharging difficulty of long horizontal and ultra-deep wells is higher, the sand flushing by adopting a continuous oil pipe mode is a technical means commonly used at present, the technology aims at the problems that the horizontal well cannot form effective sand flushing due to horizontal lying of stratum sand, the ultra-deep well is immature in the technology of the conventional continuous oil pipe equipment and high in price, the conventional oil pipe sand flushing is adopted, the pump is required to be stopped in the single joint process in the sand flushing process, the sand flushing process is stopped, the stratum sand is easy to fall back to a sand clamping pipe column, and construction risks are caused.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides a horizontal well sand discharging device and a using method thereof, which can realize continuous negative pressure sand pumping without stopping a pump, thereby effectively solving the problem of sand flushing of a horizontal well.
The invention relates to a horizontal well sand discharging device, which has the technical scheme that: comprises a sand discharge circulation pipe column assembly, a wellhead and a sleeve assembly, and also comprises a ground liquid supply circulation system, wherein the ground liquid supply circulation system comprises a high-pressure circulation system and a low-pressure circulation system,
the high-pressure circulating system comprises a circulating pump truck set, a main inlet joint, a first outlet gate, a second outlet gate, a first switch control rod, a communication gate, a first outlet joint, a second outlet joint, a first inlet high-pressure pipeline and a second inlet high-pressure pipeline, wherein the circulating pump truck set is connected with the main inlet joint through a hard pipeline, the main inlet joint and the first outlet gate and the second outlet gate form a three-way structure through steel pipe welding, the first outlet gate and the second outlet gate respectively control one way of outlet and are in opposite switch positions, the first switch control rod controls the first outlet gate and the second outlet gate to realize one way of opening, the communication gate is connected between the two ways of outlets through the steel pipe and is in a normally closed state, and the first outlet joint and the second outlet joint are welded at two ways of outlet positions and are used for connecting the first inlet high-pressure pipeline and the second inlet high-pressure pipeline;
the low-pressure circulation system comprises a three-phase separator, a total outlet joint, a first inlet gate, a second switch control rod, a first inlet joint, a second inlet joint, a first outlet low-pressure pipeline and a second outlet low-pressure pipeline, wherein the three-phase separator is used for separating oil gas, sewage and silt, the three-phase separator is connected with the total outlet joint through a soft pipeline, the total outlet joint and the first inlet gate and the second inlet gate form a three-way joint through steel pipe welding, the first inlet gate and the second inlet gate respectively control one way of inlet and are in opposite switch positions, the second switch control rod controls the first inlet gate and the second inlet gate to realize one way of opening, and the first inlet joint and the second inlet joint are welded at the two inlet positions and are used for connecting the first outlet low-pressure pipeline and the second outlet low-pressure pipeline.
Preferably, the sand discharge circulation pipe column assembly comprises a double circulation faucet, an oil pipe, an inner pipe, a double circulation valve, a high-pressure plug, a low-pressure plug, an underground power pump, an underground lifting screw pump assembly, a negative pressure sand pump, a sand pumping pipe, a sand mixer and a sand suction nozzle, wherein the lower end of the double circulation faucet is connected with the double circulation valve through a plurality of groups of oil pipes, the inner pipe is arranged in an inner cavity of the oil pipe, the high-pressure plug and the low-pressure plug are arranged on the oil pipe on a wellhead, the underground power pump, the underground lifting screw pump assembly and the negative pressure sand pump are arranged on the oil pipe at the middle lower part of an oil well, the sand pumping pipe is connected with the lower end of the negative pressure sand pump, and the tail end of the sand pumping pipe is connected with the sand mixer and the sand suction nozzle.
Preferably, the dual-circulation faucet comprises a hanging pipe, two wing tee joints, an inlet elbow, an outlet elbow, an inner pipe elbow, an inlet connecting pipe, an outlet connecting pipe, a faucet outer pipe, a faucet inner pipe, an inlet joint and an outlet joint, wherein the lower end of the hanging pipe is connected with the two wing tee joints, the lower end of the two wing tee joints is connected with the faucet outer pipe, and the faucet inner pipe is arranged in the inner cavity of the faucet outer pipe; one side of the two-wing tee joint is connected with an outlet connecting pipe through an outlet elbow, the outer end of the outlet connecting pipe is connected with an outlet joint, the upper end of the faucet inner pipe is connected with an inlet connecting pipe through an inner pipe elbow and an inlet elbow, and the outer end of the inlet connecting pipe is connected with an inlet joint.
Preferably, the sand sucking nozzle comprises a sand sucking short joint, a righting piece and a sand sucking guide head, wherein the end part of the sand sucking short joint is fixedly connected with the sand sucking guide head, the outer wall of one end of the sand sucking guide head and the inner wall of the sand sucking short joint form a support, and more than one sand sucking hole is formed in the inclined position of the other end of the sand sucking guide head; the plurality of groups of centralizing plates are welded and fixed on the outer wall of the sand suction short circuit.
Preferably, the sand mixer comprises a sand mixing cylinder and a sand mixing regulator, wherein the sand mixing regulator is arranged inside the sand mixing cylinder and is formed into an integral structure after being welded and reprocessed, more than one transverse flow passage and more than one longitudinal flow passage are arranged inside the sand mixing regulator, and a guiding inclined plane is arranged inside the sand mixing cylinder.
Preferably, the wellhead and sleeve assembly comprises a wellhead elevator, a wellhead blowout preventer, a wellhead large four-way joint and a sleeve, wherein the sleeve is connected to the lower end of the wellhead large four-way joint, the wellhead blowout preventer is arranged at the upper end of the wellhead large four-way joint, and the wellhead elevator is arranged at the upper part of the wellhead blowout preventer.
Preferably, the double-circulation valve comprises a protection joint, a valve core, a sealing cylinder, a double-circulation valve body, a bushing, a high-pressure floating valve core, a low-pressure switch sliding sleeve and a double-circulation valve inner pipe, wherein the outer wall of the lower end of the protection joint is connected with the inner wall of the upper end of the double-circulation valve body, the sealing cylinder and the valve core are arranged between the lower end of the protection joint and the inner part of the upper end of the double-circulation valve body, the valve core is arranged in the lower end of the sealing cylinder and forms a seal, the outer wall of the double-circulation valve body is provided with a high-pressure butt joint and a low-pressure butt joint, the bushing and the high-pressure floating valve core are arranged in the high-pressure butt joint, the outer wall of the lower end of the bushing is in threaded connection with the double-circulation valve body, the upper end of the high-pressure floating valve core and the high-pressure butt joint form a seal, and the lower end of the high-pressure floating valve core is arranged in the upper end of the bushing and can form a sliding seal; the outer wall of the upper end of the inner tube of the double-circulation valve is in threaded connection with the inside of the double-circulation valve body to form a seal, the low-pressure switch sliding sleeve is arranged inside the lower end of the double-circulation valve body, and transverse flow passages are formed inside the sealing cylinder, the double-circulation valve body and the low-pressure switch sliding sleeve.
Preferably, the downhole power pump is provided with a bypass passage.
The application method of the horizontal well sand discharge device provided by the invention comprises the following steps:
(1) Installing a wellhead and a matched assembly: a wellhead large four-way joint is arranged above a wellhead position sleeve, a wellhead blowout preventer is arranged above the wellhead large four-way joint, and a wellhead elevator is used for lifting and lowering an oil pipe when the workover rig works;
(2) Downhole tubular column connection: the wellhead is sequentially connected with a sand suction nozzle, a sand mixer, a sand pumping pipe and a negative pressure sand pumping pump, then connected with an underground lifting screw pump assembly and an underground power pump through oil pipes, and connected to the wellhead through a plurality of groups of oil pipes and double circulation valves;
(3) The wellhead is connected with a circulation system: when the sand suction nozzle reaches the sand surface position of the horizontal well, a double-circulation valve is arranged at the wellhead, the high-pressure plug connector and the low-pressure plug connector are fixedly connected with the butt joint of the double-circulation valve in a plug-in manner, and the high-pressure plug connector is connected with a first outlet connector of a high-pressure circulation system through a second inlet high-pressure pipeline; the low-pressure plug connector is connected with a second inlet connector of the low-pressure circulating system through a second outlet low-pressure pipeline, a first switch control rod is pulled to open a first outlet gate and simultaneously close a second outlet gate, a liquid inlet channel where the first outlet gate is positioned is opened at the moment, a second switch control rod is pulled to open the second inlet gate and simultaneously close the first inlet gate, and a liquid return channel where the second inlet gate is positioned is opened at the moment;
(4) Circulating sand pumping: the method comprises the steps that a circulating pump truck set is started, high-pressure liquid is used as sand flushing liquid to enter a high-pressure circulating system through a main inlet joint, at the moment, a first outlet gate is in an open state, the high-pressure liquid enters a second inlet high-pressure pipeline through a first outlet joint, a double-circulation valve is used for opening an internal channel through a high-pressure plug connector, then the high-pressure liquid reaches an underground power pump along the inside of an inner pipe, at the moment, the underground power pump starts to rotate and drives an underground lifting screw pump assembly to start working, meanwhile, the negative-pressure sand pump also starts working under the action of the underground lifting screw pump assembly, negative pressure is generated at the bottom of a horizontal well, the high-pressure liquid enters the annular space of a pipe column and the inner wall of a sleeve through a bypass channel which is arranged laterally of the underground power pump until reaching the bottom of the pipe column, stratum sand and the liquid are supplemented, after stratum sand and the stratum sand are subjected to sand-ratio mixing through a sand suction nozzle and a sand mixer, the formed carrier fluid enters the annular space inside the inner pipe and the inner pipe through the negative-pressure sand pump along with the circulating injection of the high-pressure liquid, the formed carrier fluid reaches the double-circulation valve along the position, and then enters the annular space outside the inner pipe through the low-pressure sand pump through the negative-pressure sand pump, and enters a second outlet joint, and enters a three-phase-oil-gas-carrier circulation inlet joint through the second inlet joint, and enters a three-phase-oil-gas-phase-separation inlet joint, and enters a three-phase circulation system through the inlet joint, and enters a three-phase circulation inlet joint, and is opened cycle, and is formed;
(5) The pump is not stopped to connect with a single pipe: the upper end of an oil pipe provided with an inner pipe is in threaded connection with the lower end of a double-circulation valve, the upper end of the double-circulation valve is in threaded connection with the lower end of a double-circulation faucet, and the inner pipe of the double-circulation faucet is inserted into the upper end of the double-circulation valve to form sliding sealing connection; a hanging pipe on a double-circulation water tap is hung by the workover rig, the lower end of a single oil pipe is in threaded connection with the upper end of a wellhead double-circulation valve, and an inner pipe is inserted into the upper end of the double-circulation valve to form sliding seal;
(6) And (3) connecting a circulation system: the inlet joint of the double-circulation faucet is connected with the second outlet joint of the high-pressure circulation system through a first inlet high-pressure pipeline, the outlet joint of the double-circulation faucet is connected with the first inlet joint of the low-pressure circulation system through a first outlet low-pressure pipeline, the second inlet gate is closed and simultaneously the first inlet gate is opened by pulling a second switch control rod, one liquid return channel where the first inlet gate is positioned is opened at the moment, the first outlet gate is closed and simultaneously the second outlet gate is opened by pulling the first switch control rod, and one liquid inlet channel where the first outlet gate is positioned is opened at the moment; removing the high-pressure plug connector, the low-pressure plug connector and the connected second inlet high-pressure pipeline and second outlet low-pressure pipeline which are connected by the double-circulation valve;
(7) Circulating sand pumping, and discharging a tubular column while pumping sand: the high-pressure liquid enters a first inlet high-pressure pipeline through a second outlet connector, enters an internal channel of a double-circulation faucet through an inlet connector, then reaches an underground power pump along the inside of an inner pipe, at the moment, the underground power pump starts to rotate to drive an underground lifting screw pump assembly to start working, meanwhile, the negative pressure sand pump also starts working under the action of the underground lifting screw pump assembly, and simultaneously generates negative pressure at the bottom of the well, the high-pressure liquid enters the annular space of a pipe column and a sleeve through a bypass channel arranged at the side of the underground power pump until reaching the bottom of the pipe column, the well bottom liquid is replenished, stratum sand and liquid are subjected to sand ratio mixing through a sand sucking nozzle and a sand mixer, then reach the position of the negative pressure sand sucking pump through the inside of the sand sucking pipe, the formed sand carrying liquid enters the annular space outside the inner pipe and the inner pipe along the position of the double-valve along with the circulating injection of the high-pressure liquid, and then enters the annular space of the oil-gas phase separator through the second outlet connector, and enters the second inlet connector through the second inlet connector, and enters the three-phase sand inlet connector and the three-phase circulation system after entering the three-phase circulation connector, and the three-phase separator is completed;
(8) And (3) repeating the steps (3) - (7) to realize continuous circulation negative pressure sand pumping without stopping the pump until the sand pumping operation of the horizontal well is completed.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the single oil pipe can be connected without stopping the pump, so that the continuous negative pressure sand pumping effect without stopping the pump is realized; the high-pressure circulation system and the low-pressure circulation system on the ground can realize one-key operation and switch an inlet and an outlet; in addition, a built-in bypass channel is added to the double-circulation faucet, so that a double-circulation effect can be realized; the underground power pump is provided with a bypass channel, high-pressure liquid enters the annular space between the pipe column and the inner wall of the sleeve through the bypass channel laterally arranged by the underground power pump until reaching the bottom of the pipe column, and the liquid at the bottom of the well is supplemented, so that the circulation of the power liquid in the pipe column can be realized; in addition, the valve groups in the high-pressure circulation system and the low-pressure circulation system are of an integrated assembly structure, and can be used after being connected, so that on-site assembly is not needed, and on-site installation procedures are reduced; in a word, the invention effectively solves the problem of sand washing of the horizontal well.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a dual cycle faucet;
FIG. 3 is a schematic view of the structure of the sand sucking nozzle;
FIG. 4 is a schematic view of the structure of the sand mixer;
FIG. 5 is a schematic diagram of a dual cycle valve;
FIG. 6 is a schematic diagram of a dual cycle valve cycle flow scheme;
FIG. 7 is a schematic diagram of a single-connection dual-cycle faucet cycle flow;
in the upper graph: the double-circulation water tap 01, an oil pipe 02, an inner pipe 03, a double-circulation valve 04, a high-pressure plug 05, a low-pressure plug 06, an underground power pump 07, an underground lifting screw pump assembly 08, a negative pressure sand pump 09, a sand pumping pipe 10, a sand mixer 11, a sand sucking nozzle 12, a wellhead elevator 13, a wellhead blowout preventer 14, a wellhead large four-way 15 and a sleeve 16;
a lifting pipe 0101, a two-wing tee 0102, an inlet elbow 0103, an outlet elbow 0104, an inner pipe elbow 0105, an inlet connecting pipe 0106, an outlet connecting pipe 0107, a faucet outer pipe 0108, and a faucet inner pipe 0109;
the valve comprises a protection joint 0401, a valve core 0402, a sealing cylinder 0403, a double-circulation valve body 0404, a bushing 0405, a high-pressure floating valve core 0406, a low-pressure switch sliding sleeve 0407 and a double-circulation valve inner tube 0408;
a circulation pump truck 1001, a main inlet joint 1002, a first outlet gate 1003, a second outlet gate 1004, a first switch lever 1005, a communication gate 1006, a first outlet joint 1007, a second outlet joint 1008, a first inlet high pressure line 1009, a second inlet high pressure line 1010, an inlet joint 1011;
the sand mixing drum 1101, the sand mixing regulator 1102, the sand suction short circuit 1201, the centralizing plate 1202, the sand suction guide head 1203, the three-phase separator 2001, the total outlet joint 2002, the first inlet gate 2003, the second inlet gate 2004, the second switch lever 2005, the first inlet joint 2006, the second inlet joint 2007, the first outlet low pressure line 2008, the second outlet low pressure line 2009, the outlet joint 2010.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Embodiment 1, referring to fig. 1-7, the horizontal well sand discharging device of the present invention comprises a sand discharging circulation pipe column assembly, a wellhead and a sleeve assembly, and further comprises a ground liquid supply circulation system, wherein the ground liquid supply circulation system comprises a high-pressure circulation system and a low-pressure circulation system,
the high-pressure circulation system comprises a circulation pump truck 1001, a total inlet joint 1002, a first outlet gate 1003, a second outlet gate 1004, a first switch control rod 1005, a communication gate 1006, a first outlet joint 1007, a second outlet joint 1008, a first inlet high-pressure pipeline 1009 and a second inlet high-pressure pipeline 1010, wherein the circulation pump truck 1001 is connected with the total inlet joint 1002 through a hard pipeline, the total inlet joint 1002, the first outlet gate 1003 and the second outlet gate 1004 form a three-way structure through steel pipe welding, the first outlet gate 1003 and the second outlet gate 1004 control one way of outlets and are in relative switch positions, the first outlet gate 1003 and the second outlet gate 1004 are controlled to realize one way opening through the first switch control rod 1005, the communication gate is connected between the two ways of outlets through a steel pipe and is in a normally closed state, and the first outlet joint 1007 and the second outlet joint 1008 are welded at two ways of outlet positions and are used for connecting the first inlet high-pressure pipeline 1009 and the second inlet high-pressure pipeline 1010;
the low-pressure circulation system comprises a three-phase separator 2001, a total outlet joint 2002, a first inlet gate 2003, a second inlet gate 2004, a second switch control rod 2005, a first inlet joint 2006, a second inlet joint 2007, a first outlet low-pressure pipeline 2008 and a second outlet low-pressure pipeline 2009, wherein the three-phase separator 2001 is used for separating oil gas, sewage and silt, the three-phase separator 2001 is connected with the total outlet joint 2002 through soft pipelines, the total outlet joint 2002 and the first inlet gate 2003 and the second inlet gate 2004 form a three-way joint through steel pipe welding, the first inlet gate 2003 and the second inlet gate 2004 respectively control one way of inlet and are in relative switch positions, the first inlet gate 2003 and the second inlet gate 2004 are controlled by the second switch control rod 2005 to realize one way of opening, and the first inlet joint 2006 and the second inlet joint 2007 are welded at two inlet positions and are used for connecting the first outlet low-pressure pipeline 2008 and the second outlet low-pressure pipeline 2009.
Referring to fig. 1, the sand discharge circulation pipe column assembly comprises a double circulation water faucet 01, an oil pipe 02, an inner pipe 03, a double circulation valve 04, a high-pressure plug connector 05, a low-pressure plug connector 06, an underground power pump 07, an underground lifting screw pump assembly 08, a negative pressure sand pump 09, a sand pumping pipe 10, a sand mixer 11 and a sand suction nozzle 12, wherein the lower end of the double circulation water faucet 01 is connected with the double circulation valve 04 through a plurality of groups of the oil pipe 02, the inner pipe 03 is arranged in the inner cavity of the oil pipe 02, the oil pipe 02 on a wellhead is provided with the high-pressure plug connector 05 and the low-pressure plug connector 06, the underground power pump 07, the underground lifting screw pump assembly 08 and the negative pressure sand pump 09 are arranged on the oil pipe 02 at the middle lower part of an oil well, the sand pumping pipe 10 is connected with the lower end of the negative pressure sand pump 09, and the tail end of the sand pumping pipe 10 is connected with the sand mixer 11 and the sand suction nozzle 12.
Referring to fig. 2, the dual cycle faucet 01 of the present invention comprises a hanging pipe 0101, a two-wing tee 0102, an inlet elbow 0103, an outlet elbow 0104, an inner pipe elbow 0105, an inlet connecting pipe 0106, an outlet connecting pipe 0107, a faucet outer pipe 0108, a faucet inner pipe 0109, an inlet joint 1011, and an outlet joint 2010, wherein the lower end of the hanging pipe 0101 is connected with the two-wing tee 0102, the lower end of the two-wing tee 0102 is connected with the faucet outer pipe 0108, and the faucet inner pipe 0109 is installed in the inner cavity of the faucet outer pipe 0108; one side of the two-wing tee 0102 is connected with an outlet connecting pipe 0107 through an outlet elbow 0104, the outer end of the outlet connecting pipe 0107 is connected with an outlet joint 2010, the upper end of the faucet inner pipe 0109 is connected with an inlet connecting pipe 0106 through an inner pipe elbow 0105 and an inlet elbow 0103, and the outer end of the inlet connecting pipe 0106 is connected with an inlet joint 1011.
Referring to fig. 3, the sand suction nozzle 12 of the present invention includes a sand suction short circuit 1201, a centralizing piece 1202, and a sand suction guide head 1203, wherein the end of the sand suction short circuit 1201 is fixedly connected with the sand suction guide head 1203, the outer wall of one end of the sand suction guide head 1203 forms a support with the inner wall of the sand suction short circuit 1201, and more than one sand suction hole is provided at the inclined position of the other end of the sand suction guide head 1203; the plurality of sets of righting sheets 1202 are welded and fixed on the outer wall of the sand suction short circuit 1201.
Referring to fig. 4, the sand mixer 11 according to the present invention includes a sand mixing drum 1101 and a sand mixing regulator 1102, wherein the sand mixing regulator 1102 is disposed inside the sand mixing drum 1101, and is formed into an integral structure after being reworked by welding, more than one lateral flow passage and more than one longitudinal flow passage are provided inside the sand mixing regulator 1102, and a guiding inclined plane is provided inside the sand mixing drum 1101.
The wellhead and sleeve assembly comprises a wellhead elevator 13, a wellhead blowout preventer 14, a wellhead large four-way joint 15 and a sleeve 16, wherein the sleeve 16 is connected to the lower end of the wellhead large four-way joint 15, the wellhead blowout preventer 14 is arranged at the upper end of the wellhead large four-way joint 15, and the wellhead elevator 13 is arranged at the upper part of the wellhead blowout preventer 14.
Referring to fig. 5, the double-circulation valve 04 of the present invention includes a protection joint 0401, a valve core 0402, a sealing cylinder 0403, a double-circulation valve body 0404, a bushing 0405, a high-pressure floating valve core 0406, a low-pressure switch sliding sleeve 0407 and a double-circulation valve inner tube 0408, wherein the outer wall of the lower end of the protection joint 0401 is connected with the inner wall of the upper end of the double-circulation valve body 0404, the sealing cylinder 0403 and the valve core 0402 are arranged at the lower end of the protection joint 0401 and the middle of the inner part of the upper end of the double-circulation valve body 0404, the valve core 0402 is arranged at the lower end of the sealing cylinder 0403 and forms a seal, the outer wall of the double-circulation valve body 0404 is provided with a high-pressure butt joint and a low-pressure butt joint, the bushing 0405 and the high-pressure floating valve core 0406 are arranged at the inner wall of the lower end of the bushing 0405 and form a sliding seal with the high-pressure butt joint of the double-circulation valve body 0404; the outer wall of the upper end of the double-circulation valve inner tube 0408 is in threaded connection with the inside of the double-circulation valve body 0404 to form a seal, the low-pressure switch sliding sleeve 0407 is arranged in the lower end of the double-circulation valve body 0404, and transverse flow passages are formed in the sealing cylinder 0403, the double-circulation valve body 0404 and the low-pressure switch sliding sleeve 0407.
In addition, the underground power pump 07 is provided with a bypass channel, and high-pressure liquid enters the annular space between the pipe column and the inner wall of the sleeve 16 through the bypass channel laterally arranged on the underground power pump 07 until reaching the bottom of the pipe column, so as to supplement the liquid at the bottom of the well; in addition, the downhole power pump 07, the downhole lifting screw pump assembly 08 and the negative pressure sand pump 09 are well known to those skilled in the art, and will not be described in detail.
The application method of the horizontal well sand discharge device provided by the invention comprises the following steps:
(1) Installing a wellhead and a matched assembly: a wellhead large four-way 15 is arranged above a wellhead position sleeve 16, a wellhead blowout preventer 14 is arranged above the wellhead large four-way 15, and an oil pipe 02 is started and started when a wellhead elevator 13 is used for workover rig operation;
(2) Downhole tubular column connection: the wellhead is sequentially connected with a sand sucking nozzle 12, a sand mixer 11, a sand pumping pipe 10 and a negative pressure sand pumping pump 09, then connected with an underground lifting screw pump assembly 08 and an underground power pump 07 through an oil pipe 02, and connected to the wellhead through a plurality of groups of oil pipes 02 and double circulation valves 04;
(3) The wellhead is connected with a circulation system: after the sand sucking mouth 12 reaches the sand surface position of the horizontal well, a double-circulation valve 04 is arranged at the wellhead, a high-pressure plug 05 and a low-pressure plug 06 are fixedly plugged with the butt joint of the double-circulation valve 04, and the high-pressure plug 05 is connected with a first outlet joint 1007 of a high-pressure circulation system through a second inlet high-pressure pipeline 1010; the low-pressure plug connector 06 is connected with a second inlet connector 2007 of the low-pressure circulation system through a second outlet low-pressure pipeline 2009, the first outlet gate 1003 is opened and the second outlet gate 1004 is closed by pulling the first switch control rod 1005, at the moment, one liquid inlet channel where the first outlet gate 1003 is positioned is opened, the second inlet gate 2004 is opened and the first inlet gate 2003 is closed by pulling the second switch control rod 2005, at the moment, one liquid return channel where the second inlet gate 2004 is positioned is opened;
(4) Circulating sand pumping: the circulating pump set 1001 is started, high-pressure liquid is used as sand washing liquid to enter a high-pressure circulating system through the main inlet joint 1002, at the moment, the first outlet gate 1003 is in an open state, the high-pressure liquid enters the second inlet high-pressure pipeline 1010 through the first outlet joint 1007, enters the double-circulating valve 04 through the high-pressure plug-in joint 05 to open an internal passage, then the high-pressure liquid reaches the underground power pump 07 along the inside of the inner pipe 03, at the moment, the underground power pump 07 starts rotating to drive the underground lifting screw pump assembly 08 to start working, meanwhile, the negative pressure sand pump 09 also starts working under the action of the underground lifting screw pump assembly 08, at the same time, negative pressure is generated at the bottom of a horizontal well, the high-pressure liquid enters the annular space between a pipe column and the inner wall of the sleeve 16 through the bypass passage laterally arranged by the underground power pump 07, until reaching the bottom of the pipe column, supplementing the bottom liquid, carrying out sand ratio mixing on stratum sand by a sand suction nozzle 12 and a sand mixer 11, then reaching the position of a negative pressure sand pump 09 through the inside of a sand pumping pipe 10, along with the circulation injection of high-pressure liquid, enabling formed sand-carrying liquid to enter an annular space inside an oil pipe 02 and outside an inner pipe 03 through the negative pressure sand pump 09, enabling the sand-carrying liquid to reach the position of a double circulation valve 04 along the annular space, then entering a second outlet low-pressure pipeline 2009 through a low-pressure plug 06, then entering a low-pressure circulation system through a second inlet connector 2007, and enabling the sand-carrying liquid to enter a three-phase separator 2001 through a total outlet connector 2002 for oil gas, sewage and mud sand separation due to the fact that the second inlet gate 2004 is at an opening position, and completing a circulation period;
(5) The pump is not stopped to connect with a single pipe: the upper end of an oil pipe 02 provided with an inner pipe 03 is in threaded connection with the lower end of a double-circulation valve 04, the upper end of the double-circulation valve 04 is in threaded connection with the lower end of a double-circulation faucet 01, and the inner pipe 03 of the double-circulation faucet 01 is inserted into the upper end of the double-circulation valve 04 to form sliding sealing connection; a hanging pipe 0101 on a double-circulation water tap 01 of the workover rig is used for connecting the lower end of a single oil pipe 02 with the upper end of a wellhead double-circulation valve 04 in a threaded manner, and an inner pipe 03 is inserted into the upper end of the double-circulation valve 04 to form sliding seal;
(6) And (3) connecting a circulation system: the inlet joint 1011 of the double-circulation faucet 01 is connected with the second outlet joint 1008 of the high-pressure circulation system through a first inlet high-pressure pipeline 1009, the outlet joint 2010 of the double-circulation faucet is connected with the first inlet joint 2006 of the low-pressure circulation system through a first outlet low-pressure pipeline 2008, the second inlet gate 2004 is closed and the first inlet gate 2003 is opened by pulling the second switch control rod 2005, a liquid return channel where the first inlet gate 2003 is positioned is opened at the moment, the first outlet gate 1003 is closed and the second outlet gate 1004 is opened by pulling the first switch control rod 1005, and a liquid inlet channel where the first outlet gate 1003 is positioned is opened at the moment; removing the high-pressure plug 05, the low-pressure plug 06 and the second inlet high-pressure pipeline 1010 and the second outlet low-pressure pipeline 2009 which are connected with the double-circulation valve 04;
(7) Circulating sand pumping, and discharging a tubular column while pumping sand: because the high-pressure liquid is continuously pumped into the circulating pump set 1001, the gates of the high-pressure circulating system and the low-pressure circulating system are converted, the second outlet gate 1004 is in an open state, the high-pressure liquid enters the first inlet high-pressure pipeline 1009 through the second outlet connector 1008, enters the internal channel of the double-circulating faucet 01 through the inlet connector 1011, then reaches the underground power pump 07 along the inner part of the inner pipe 03, at this time, the underground power pump 07 starts rotating to drive the underground lifting screw pump assembly 08 to start working, meanwhile, the negative pressure sand pump 09 also starts working under the action of the underground lifting screw pump assembly 08, at the same time, negative pressure is generated at the bottom of the well, the high-pressure liquid enters the annular space between the pipe column and the inner wall of the sleeve 16 through the bypass channel laterally arranged by the underground power pump 07, until reaching the bottom of the pipe column, supplementing the bottom liquid, carrying out sand ratio mixing on stratum sand by a sand suction nozzle 12 and a sand mixer 11, then reaching the position of a negative pressure sand pump 09 through the inside of a sand pumping pipe 10, along with the circulation injection of high-pressure liquid, enabling formed sand-carrying liquid to enter an annular space inside an oil pipe 02 and outside an inner pipe 03 through the negative pressure sand pump 09, enabling the sand-carrying liquid to reach the position of a double circulation valve 04 along the annular space, then entering a second outlet low-pressure pipeline 2009 through a low-pressure plug 06, then entering a low-pressure circulation system through a second inlet connector 2007, and enabling the sand-carrying liquid to enter a three-phase separator 2001 through a total outlet connector 2002 for oil gas, sewage and mud sand separation due to the fact that the second inlet gate 2004 is at an opening position, and completing a circulation period;
(8) And (3) repeating the steps (3) - (7) to realize continuous circulation negative pressure sand pumping without stopping the pump until the sand pumping operation of the horizontal well is completed.
The above description is only a few preferred embodiments of the present invention, and any person skilled in the art may make modifications to the above described embodiments or make modifications to the same. Accordingly, the corresponding simple modifications or equivalent changes according to the technical scheme of the present invention fall within the scope of the claimed invention.
Claims (9)
1. The utility model provides a horizontal well sand discharging device, includes sand discharging circulation tubular column assembly, well head and sleeve pipe assembly, characterized by: the system also comprises a ground liquid supply circulation system, wherein the ground liquid supply circulation system comprises a high-pressure circulation system and a low-pressure circulation system,
the high-pressure circulating system comprises a circulating pump set (1001), a total inlet joint (1002), a first outlet gate (1003), a second outlet gate (1004), a first switch control rod (1005), a communication gate (1006), a first outlet joint (1007), a second outlet joint (1008), a first inlet high-pressure pipeline (1009) and a second inlet high-pressure pipeline (1010), wherein the circulating pump set (1001) is connected with the total inlet joint (1002) through a hard pipeline, the total inlet joint (1002) and the first outlet gate (1003) and the second outlet gate (1004) form a three-way structure through steel pipe welding, the first outlet gate (1003) and the second outlet gate (1004) control one-way outlet and are in opposite switch positions, the first outlet gate (1003) and the second outlet gate (1004) are controlled to be opened by the first switch control rod (1005), the communication gate (1006) is connected between the two-way outlets through a steel pipe and is in a normally closed state, and the first outlet joint (1007) and the second outlet joint (1008) are welded at two-way outlet positions and are used for connecting the first inlet high-pressure pipeline (1009) and the second inlet high-pressure pipeline (1010);
the low-pressure circulation system comprises a three-phase separator (2001), a total outlet joint (2002), a first inlet gate (2003), a second inlet gate (2004), a second switch control rod (2005), a first inlet joint (2006), a second inlet joint (2007), a first outlet low-pressure pipeline (2008) and a second outlet low-pressure pipeline (2009), the three-phase separator (2001) is used for separating oil gas, sewage and silt, the three-phase separator (2001) is connected with the total outlet joint (2002) through a soft pipeline, the total outlet joint (2002) is welded with the first inlet gate (2003) and the second inlet gate (2004) through steel pipes to form a three-way joint, the first inlet gate (2003) and the second inlet gate (2004) are respectively controlled to be in a way opening and closing position, the first inlet gate (2003) and the second inlet gate (2004) are controlled to be opened in a way through the second switch control rod (2005), and the first inlet joint (2006) and the second inlet joint (2007) are welded at two way opening positions and are used for connecting the first outlet low-pressure pipeline (2008) and the second outlet low-pressure pipeline (2009).
2. The horizontal well sand removing apparatus according to claim 1, wherein: the sand discharge circulation pipe column assembly comprises a double circulation water faucet (01), an oil pipe (02), an inner pipe (03), a double circulation valve (04), a high-pressure plug (05), a low-pressure plug (06), an underground power pump (07), an underground lifting screw pump assembly (08), a negative pressure sand pump (09), a sand pumping pipe (10), a sand mixer (11) and a sand suction nozzle (12), wherein the lower end of the double circulation water faucet (01) is connected with the double circulation valve (04) through a plurality of groups of oil pipes (02), the inner pipe (03) is arranged in an inner cavity of the oil pipe (02), the high-pressure plug (05) and the low-pressure plug (06) are arranged on the oil pipe (02) on the wellhead, the underground power pump (07), the underground lifting screw pump assembly (08) and the negative pressure sand pumping pump (09) are arranged on the oil pipe (02) on the middle lower portion of an oil well, the lower end of the negative pressure sand pumping pump (09) is connected with the sand pumping pipe (10), and the tail end of the sand pumping pipe (10) is connected with the sand mixer (11) and the sand suction nozzle (12).
3. The horizontal well sand removing apparatus according to claim 2, wherein: the double-circulation faucet (01) comprises a hanging pipe (0101), a two-wing tee joint (0102), an inlet elbow (0103), an outlet elbow (0104), an inner pipe elbow (0105), an inlet connecting pipe (0106), an outlet connecting pipe (0107), a faucet outer pipe (0108), a faucet inner pipe (0109), an inlet joint (1011) and an outlet joint (2010), wherein the lower end of the hanging pipe (0101) is connected with the two-wing tee joint (0102), the lower end of the two-wing tee joint (0102) is connected with a faucet outer pipe (0108), and the faucet inner pipe (0109) is arranged in the inner cavity of the faucet outer pipe (0108); one side of the two-wing tee joint (0102) is connected with an outlet connecting pipe (0107) through an outlet elbow (0104), the outer end of the outlet connecting pipe (0107) is connected with an outlet joint (2010), the upper end of the faucet inner pipe (0109) is connected with an inlet connecting pipe (0106) through an inner pipe elbow (0105) and an inlet elbow (0103), and the outer end of the inlet connecting pipe (0106) is connected with an inlet joint (1011).
4. A horizontal well sand removal apparatus as set forth in claim 3 wherein: the sand sucking nozzle (12) comprises a sand sucking short joint (1201), a centralizing piece (1202) and a sand sucking guide head (1203), wherein the end part of the sand sucking short joint (1201) is fixedly connected with the sand sucking guide head (1203), the outer wall of one end of the sand sucking guide head (1203) forms a support with the inner wall of the sand sucking short joint (1201), and more than one sand sucking hole is formed in the inclined position of the other end of the sand sucking guide head (1203); the plurality of groups of righting sheets (1202) are welded and fixed on the outer wall of the sand suction short circuit (1201).
5. The horizontal well sand removing apparatus according to claim 4, wherein: the sand mixer (11) comprises a sand mixing cylinder (1101) and a sand mixing regulator (1102), wherein the sand mixing regulator (1102) is arranged inside the sand mixing cylinder (1101), an integral structure is formed after the sand mixing regulator (1102) is reprocessed by welding, more than one transverse flow passage and more than one longitudinal flow passage are arranged inside the sand mixing regulator (1102), and a guiding inclined plane is arranged inside the sand mixing cylinder (1101).
6. The horizontal well sand removing apparatus according to claim 5, wherein: the wellhead and casing assembly comprises a wellhead elevator (13), a wellhead blowout preventer (14), a wellhead large four-way joint (15) and a casing (16), wherein the casing (16) is connected to the lower end of the wellhead large four-way joint (15), the wellhead blowout preventer (14) is arranged at the upper end of the wellhead large four-way joint (15), and the wellhead elevator (13) is arranged on the upper portion of the wellhead blowout preventer (14).
7. The horizontal well sand removing apparatus according to claim 6, wherein: the double-circulation valve (04) comprises a protection joint (0401), a valve core (0402), a sealing cylinder (0403), a double-circulation valve body (0404), a bushing (0405), a high-pressure floating valve core (0406), a low-pressure switch sliding sleeve (0407) and a double-circulation valve inner pipe (0408), wherein the outer wall of the lower end of the protection joint (0401) is connected with the inner wall of the upper end of the double-circulation valve body (0404), the sealing cylinder (0403) and the valve core (0402) are arranged between the lower end of the protection joint (0401) and the inner part of the upper end of the double-circulation valve body (0404), the valve core (0402) is arranged in the lower end of the sealing cylinder (0403) and forms a seal, the outer wall of the double-circulation valve body (0404) is provided with a high-pressure butt joint port and a low-pressure butt joint port, the bushing (0405) and the high-pressure floating valve core (0406) are arranged in the high-pressure butt joint of the double-circulation valve body (0404), the outer wall of the lower end of the bushing (0405) is in the double-circulation valve body (0404) in a threaded connection, and the high-pressure floating valve core (0406) forms a seal with the high-pressure butt joint; the outer wall of the upper end of the inner tube (0408) of the double-circulation valve is in threaded connection with the inside of the double-circulation valve body (0404) to form a seal, the low-pressure switch sliding sleeve (0407) is arranged in the lower end of the double-circulation valve body (0404), and the sealing cylinder (0403), the double-circulation valve body (0404) and the low-pressure switch sliding sleeve (0407) are all internally provided with transverse flow passages.
8. The horizontal well sand removing apparatus according to claim 7, wherein: the underground power pump (07) is provided with a bypass channel.
9. The method of using a horizontal well sand removal apparatus as set forth in claim 8, comprising the steps of:
(1) Installing a wellhead and a matched assembly: a wellhead large four-way joint (15) is arranged above a wellhead position sleeve (16), a wellhead blowout preventer (14) is arranged above the wellhead large four-way joint (15), and an oil pipe (02) is started and started when a wellhead elevator (13) is used for workover rig operation;
(2) Downhole tubular column connection: the wellhead is sequentially connected with a sand sucking nozzle (12), a sand mixer (11), a sand pumping pipe (10) and a negative pressure sand pumping pump (09), then is connected with an underground lifting screw pump assembly (08) and an underground power pump (07) through an oil pipe (02), and is connected to the wellhead through a plurality of groups of oil pipes (02) and double circulation valves (04);
(3) The wellhead is connected with a circulation system: after the sand suction nozzle (12) reaches the sand surface position of the horizontal well, a double-circulation valve (04) is arranged at the wellhead, a high-pressure plug connector (05) and a low-pressure plug connector (06) are fixedly connected with a butt joint of the double-circulation valve (04) in a plug-in manner, and the high-pressure plug connector (05) is connected with a first outlet connector (1007) of a high-pressure circulation system through a second inlet high-pressure pipeline (1010); the low-pressure plug connector (06) is connected with a second inlet connector (2007) of the low-pressure circulating system through a second outlet low-pressure pipeline (2009), a first switch control rod (1005) is pulled, a first outlet gate (1003) is opened, meanwhile, a second outlet gate (1004) is closed, at the moment, a liquid inlet channel where the first outlet gate (1003) is positioned is opened, a second inlet gate (2004) is opened, at the moment, a first inlet gate (2003) is closed by pulling a second switch control rod (2005), at the moment, a liquid return channel where the second inlet gate (2004) is positioned is opened;
(4) Circulating sand pumping: the circulating pump set (1001) is started, high-pressure liquid enters a high-pressure circulating system through a main inlet joint (1002), at the moment, a first outlet gate (1003) is in an open state, high-pressure liquid enters a second inlet high-pressure pipeline (1010) through a first outlet joint (1007), the high-pressure liquid enters a double circulation valve (04) through a high-pressure plug (05) to open an internal passage, then the high-pressure liquid reaches an underground power pump (07) along the inside of an inner pipe (03), at the moment, the underground power pump (07) starts to rotate, a downhole lifting screw pump assembly (08) is driven to start to work, meanwhile, a negative pressure sand pump (09) also starts to work under the action of the downhole lifting screw pump assembly (08), at the same time, negative pressure is generated at the bottom of a horizontal well, the high-pressure liquid enters the inner wall of a pipe column and a sleeve (16) through a bypass passage laterally arranged by the underground power pump (07), until reaching the bottom of the pipe column, after formation sand and the sand mixer (11) are subjected to specific mixing, the negative pressure sand reaches the inside of the suction pipe (10) through a sand-carrying nozzle (12) and the sand mixer (11), the negative pressure sand carrying position reaches the inner pipe (09) along with the sand carrying position of the double circulation valve (09), the negative pressure pump (09) reaches the inner side of the double circulation valve (04 along with the position (09) along with the sand carrying position of the sand carrying point (02) and the annular space, then enters a low-pressure circulation system through a second inlet joint (2007), and sand-carrying fluid enters a three-phase separator (2001) through a total outlet joint (2002) to separate oil gas, sewage and silt because a second inlet gate (2004) is in an open position, and a circulation period is completed at the moment;
(5) The pump is not stopped to connect with a single pipe: the upper end of an oil pipe (02) provided with an inner pipe (03) is in threaded connection with the lower end of a double-circulation valve (04), the upper end of the double-circulation valve (04) is in threaded connection with the lower end of a double-circulation faucet (01), and the inner pipe (03) of the double-circulation faucet (01) is inserted into the upper end of the double-circulation valve (04) to form sliding sealing connection; a hanging pipe (0101) on a double-circulation water tap (01) of the workover rig is used for connecting the lower end of a single oil pipe (02) with the upper end of a wellhead double-circulation valve (04) in a threaded manner, and an inner pipe (03) is inserted into the upper end of the double-circulation valve (04) to form sliding seal;
(6) And (3) connecting a circulation system: an inlet joint (1011) of the double-circulation faucet (01) is connected with a second outlet joint (1008) of the high-pressure circulation system through a first inlet high-pressure pipeline (1009), an outlet joint (2010) of the double-circulation faucet is connected with a first inlet joint (2006) of the low-pressure circulation system through a first outlet low-pressure pipeline (2008), a second switch control rod (2005) is pulled to close the second inlet gate (2004) and simultaneously open the first inlet gate (2003), a liquid return channel where the first inlet gate (2003) is located is opened at the moment, a first switch control rod (1005) is pulled to close the first outlet gate (1003) and simultaneously open the second outlet gate (1004), and a liquid inlet channel where the first outlet gate (1003) is located is opened at the moment; dismantling a high-pressure plug (05), a low-pressure plug (06) and a second inlet high-pressure pipeline (1010) and a second outlet low-pressure pipeline (2009) which are connected with the double-circulation valve (04);
(7) Circulating sand pumping, and discharging a tubular column while pumping sand: because the circulating pump set (1001) is continuously pumped with high-pressure liquid, the high-pressure circulating system and the gate of the low-pressure circulating system are switched, at the moment, the second outlet gate (1004) is in an open state, the high-pressure liquid enters the first inlet high-pressure pipeline (1009) through the second outlet connector (1008), enters the internal channel of the double-circulating faucet (01) through the inlet connector (1011), then the high-pressure liquid reaches the underground power pump (07) along the inside of the inner pipe (03), at the moment, the underground power pump (07) starts to rotate, the underground lifting screw pump assembly (08) is driven to start to work, meanwhile, the negative pressure sand pump (09) also starts to work under the action of the underground lifting screw pump assembly (08), at the same time, negative pressure is generated at the bottom of the well, the high-pressure liquid enters the inner wall annulus of the pipe column and the sleeve (16) through the bypass channel laterally arranged by the underground power pump (07), until reaching the bottom of the pipe column, after stratum sand and the sand are mixed by the sand pump (12) and the sand mixer (11), the negative pressure sand reaches the position inside the sand pump (10) along with the sand carrying point, the negative pressure pump (09) reaches the position of the inner pipe (09), the negative pressure sand carrying point (09) enters the inner wall of the double-circulating pipeline (2009), the sand pump (09) along with the position of the negative pressure circulating pump (02) and reaches the position of the inner wall of the double-circulating pump (2009), then enters a low-pressure circulation system through a second inlet joint (2007), and sand-carrying fluid enters a three-phase separator (2001) through a total outlet joint (2002) to separate oil gas, sewage and silt because a second inlet gate (2004) is in an open position, and a circulation period is completed at the moment;
(8) And (3) repeating the steps (3) - (7) to realize continuous circulation negative pressure sand pumping without stopping the pump until the sand pumping operation of the horizontal well is completed.
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| CN202310996309.XA CN116717203B (en) | 2023-08-09 | 2023-08-09 | Horizontal well sand discharging device and use method |
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| CN202310996309.XA CN116717203B (en) | 2023-08-09 | 2023-08-09 | Horizontal well sand discharging device and use method |
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| US3593800A (en) * | 1969-08-25 | 1971-07-20 | Chevron Res | Apparatus for making preformed foam for use in wells |
| CN102094586A (en) * | 2010-12-24 | 2011-06-15 | 中国石油天然气股份有限公司 | Ground sand washing device for horizontal well and application method thereof |
| CN102383750A (en) * | 2011-09-28 | 2012-03-21 | 张作阳 | Continuous positive and negative integrated sand washing device for oil well |
| CN105041243A (en) * | 2015-07-14 | 2015-11-11 | 中国石油天然气股份有限公司 | Horizontal well concentric tubing continuous negative pressure sand pump process tubular column |
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3593800A (en) * | 1969-08-25 | 1971-07-20 | Chevron Res | Apparatus for making preformed foam for use in wells |
| CN102094586A (en) * | 2010-12-24 | 2011-06-15 | 中国石油天然气股份有限公司 | Ground sand washing device for horizontal well and application method thereof |
| CN102383750A (en) * | 2011-09-28 | 2012-03-21 | 张作阳 | Continuous positive and negative integrated sand washing device for oil well |
| CN105041243A (en) * | 2015-07-14 | 2015-11-11 | 中国石油天然气股份有限公司 | Horizontal well concentric tubing continuous negative pressure sand pump process tubular column |
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
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