CN111734370A - Application method of petroleum layered oil production device - Google Patents
Application method of petroleum layered oil production device Download PDFInfo
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- CN111734370A CN111734370A CN202010694153.6A CN202010694153A CN111734370A CN 111734370 A CN111734370 A CN 111734370A CN 202010694153 A CN202010694153 A CN 202010694153A CN 111734370 A CN111734370 A CN 111734370A
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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
- E21B43/14—Obtaining from a multiple-zone well
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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
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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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- 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
Abstract
The invention relates to a using method of a petroleum layered oil production device. The technical scheme is as follows: form feed liquor chamber (A) between efflux suction pipe column and the upper oil reservoir II suction pipe column, form the second between the bottom of upper oil reservoir II suction pipe column and the lower floor's oil reservoir I suction pipe column and return liquid chamber (B), the inner chamber of lower floor's oil reservoir I suction pipe column is first returns liquid chamber (C), and beneficial effect is: the invention realizes the direct control of the produced liquid of a plurality of oil layers of the stratified oil extraction, so that the obtained data is more real and reliable; the induced liquid adopts the original well liquid, so that not only are resources and cost saved, but also the extracted liquid components are ensured to have no invasion interference of foreign substances, and the method is more accurate and real; thirdly, the combination of injection and well washing saves space, increases the number of layers to be produced, and ensures that the service cycle of the oil well is longer; and fourthly, the layered mining eliminates the interlayer interference, and avoids the problems that only mixed mining is available originally, flooding is easy to occur, oil cannot be produced due to the water produced by the oil reservoir, and normal mining cannot be carried out.
Description
Technical Field
The invention relates to an oil exploitation device and method, in particular to a using method of an oil layering oil exploitation device.
Background
In the process of oil exploitation, because the stratum structure is more complicated, a negative pressure jetting and sucking technology, namely a jet flow oil extraction technology, is often adopted, and the negative pressure jetting and sucking technology depends on working fluid with certain pressure to be jetted and taken away by a nozzle at high speed, and just because the jet flow oil extraction technology needs to establish liquid circulation, and liquid flow or air flow channels are more complicated, so that the negative pressure jetting and sucking technology is mainly applied to single-layer oil extraction at present, and we know that: the stratified oil extraction is a fine management mode, particularly under the conditions of poor petroleum resources, complex geological conditions and high extraction difficulty in our country, if the jet stratified oil extraction mode can be realized, in the area suitable for jet extraction, the interference among oil layers can be overcome, the oil extraction efficiency is improved, the cost is saved, and the benefit is increased.
Disclosure of Invention
The invention aims to provide a using method of a petroleum layered oil extraction device, which aims to overcome the defects in the prior art, establishes relatively independent circulating systems, adopts a ground control mode, namely each oil production layer is provided with an independent oil extraction circulating system, realizes jet layered oil extraction in an independent liquid supply mode, and ensures that the oil layers are not interfered with each other.
The invention provides a using method of a petroleum layered oil extraction device, which adopts the technical scheme that: comprises a second layer of oil extraction, a first layer of oil extraction and well washing,
the first and second layer oil extraction comprises the following processes: injecting induced liquid into a high-pressure liquid supply tank (21), opening a valve a, supplying liquid through a high-pressure injection pump (18), sealing a downhole packer, sequentially opening valves d, e, f and g, allowing the high-pressure liquid to enter a liquid inlet cavity (A) through the valve d, allowing the induced liquid to flow downwards along the liquid inlet cavity (A) and be sprayed to a second liquid return cavity (B) through an upper-layer negative pressure jet hole (6.1), allowing the formed negative pressure to drive oil and water in an oil reservoir II to flow upwards along the second liquid return cavity (B) through the valve e, allowing one part of the oil and water to enter the high-pressure pump liquid supply tank (21) through the valve f, and allowing the other part of the oil and water to enter an external discharge pipeline through the valve g to form a second-layer oil extraction process, and closing the valves k, h and j all the time;
the first layer oil extraction comprises the following processes: when oil extraction needs to be carried out on the oil reservoir I, a valve a is opened, liquid is supplied through a high-pressure injection pump (18), an underground packer is sealed, then valves d, k, h and j are opened in sequence, high-pressure liquid enters a liquid inlet cavity (A) through the valve d, induced liquid is downward along the liquid inlet cavity (A) and is sprayed to a first liquid return cavity (C) through a lower-layer negative-pressure jet hole (7.1), the formed negative pressure drives oil and water of the oil reservoir I to upwards pass through the valve k along the first liquid return cavity (C), one part of the oil and water enters a high-pressure pump liquid supply tank (21) through the valve h, the other part of the oil and water enters an external discharge pipeline through the valve j to form first-layer oil extraction, and the valves e, f and g are closed all the time;
thirdly, the well washing process comprises the following steps:
when the liquid is thick and the underground pipe column is blocked, namely the well is required to be washed, the valves b, c and L are opened, and the well washing liquid can be specially supplied to the high-pressure injection pump 18 for well washing through the control valve b;
when the well is washed, the flow direction of the liquid is as follows: the cleaning agent enters an annular space of a sleeve and a jet flow suction pipe column (5) through a valve b → a high-pressure injection pump (18) → valve c, passes through a second washable well packer (10), a K344 interval packer (8) and a first washable well packer (4), and then passes through a liquid inlet check valve (2) → lower-layer negative pressure jet hole (7.1) → liquid inlet cavity (A) to clean the liquid inlet cavity (A), and at the moment, valves e, f and g and valves K, h and j are closed;
after the liquid inlet cavity (A) is washed, the valves e and g are opened, the valve L is closed, the second liquid return cavity (B) is washed, and the washing liquid is discharged through the connection of an external discharge pipeline;
after the second liquid return cavity (B) is cleaned, the valves k and j are opened, the valves e and g are closed, the first liquid return cavity (C) is cleaned, and cleaning liquid is discharged through the connection of an external discharge pipeline, so that the whole underground pipe column is cleaned.
Preferably, a valve above the second liquid return cavity (B) is opened, the liquid inlet cavity (A) enters the second liquid return cavity (B) through an upper-layer negative pressure jet hole (6.1) to form negative pressure, the flow dividing liquid inlet overflowing device (9) is driven to be opened, oil of the upper-layer oil reservoir II is taken out, and the oil is lifted to the well mouth along the second liquid return cavity (B).
Preferably, the lower layer liquid inlet opening valve (22) can adopt a steel ball.
Preferably, lower floor's feed liquor opens valve (22) and includes floating valve (22.1), valve body (22.2), rubber (22.3), locating pin (22.4), return spring (22.5), crosses liquid passageway (22.6) and feed area (22.7), the downside inner chamber of valve body (22.2) is equipped with the feed area (22.7) of toper structure, and the middle part of feed area (22.7) is equipped with locating pin (22.4) and return spring (22.5), is equipped with a plurality of liquid passageways (22.6) of crossing in the outside of feed area (22.7), crosses the bottom of liquid passageway (22.6) and feeds through with the cavity of feed area (22.7), and the top is passed through rubber (22.3) and is connected with floating valve (22.1), floating valve (22.1) are the toper structure, and the bottom is connected at locating pin (22.4) through return spring (22.5).
The invention has the beneficial effects that: the invention realizes the direct control of the produced liquid of a plurality of oil layers of the stratified oil extraction, so that the obtained data is more real and reliable; secondly, the induced liquid adopts the original well liquid, so that not only are resources and expenses saved, but also the extracted liquid components are ensured to have no invasion interference of foreign substances, and the method is more accurate and real; thirdly, the combination of injection and well washing saves space, increases the number of layers to be produced, and ensures that the service cycle of the oil well is longer; fourthly, the layered mining eliminates the interlayer interference, and avoids the problems that only mixed mining can be carried out originally, flooding is easy to occur, oil cannot be produced due to oil reservoir water production, and normal mining cannot be carried out; fifthly, the high-pressure injection pump is installed on the ground, so that the overhaul is more convenient, and the ground grid connection (namely, manifold) becomes very convenient because a plurality of independent mining channels are formed by adopting concentric pipe columns.
Drawings
FIG. 1 is a schematic representation of the construction of the downhole portion of the present invention;
FIG. 2 is a schematic representation of the structure of the uphole control portion of the present invention;
FIG. 3 is a schematic cross-sectional view of a split feed flow through apparatus;
FIG. 4 is a schematic structural view of a power jet adapter;
FIG. 5 is a schematic structural diagram of a lower liquid inlet opening valve;
in the upper diagram: the device comprises an oil well casing 1, a liquid inlet check valve 2, a bottom layer butting device 3, a first washable well packer 4, a jet flow suction pipe column 5, an upper layer oil deposit II suction pipe column 6, a lower layer oil deposit I suction pipe column 7, a K344 interval packer 8, a split liquid inlet flow passing device 9, a second washable well packer 10, a casing flange 11, a large four-way 12, a hanger 13, a jet flow four-way 14, a suction four-way 15, a bottom layer liquid outlet joint 16, an injection pipeline 17, a high-pressure injection pump 18, an injection liquid supply pipeline 19, a control valve 20, a high-pressure pump liquid supply tank 21, a lower layer liquid inlet opening valve 22, a pipe column blocking end cover 23, a liquid inlet cavity A, a second liquid return cavity B, a first liquid return cavity C, an upper layer negative pressure jet hole 6.1, a lower layer negative pressure jet hole 7.1, a floating valve 22.1, a valve body 22.2, rubber 22.3, a positioning pin 22.4, a return spring 22.5, a liquid passing channel 22.6 and a liquid supply area 22.7, Lower joint 24.3, diffusion chamber 24.4.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1-2, the invention provides a petroleum layered oil production device, namely a jet flow type layered oil production device, which comprises an oil well casing 1, a liquid inlet check valve 2, a bottom layer butt joint device 3, a first washable well packer 4, a jet flow suction pipe column 5, an upper layer oil reservoir II suction pipe column 6, a lower layer oil reservoir I suction pipe column 7, a K344 interval packer 8, a split liquid inflow overflowing device 9, a second washable well packer 10, a high pressure injection pump 18, an injection liquid supply pipeline 19, a high pressure pump liquid supply tank 21, a lower layer liquid inlet opening valve 22, a pipe column blocking end cover 23, a liquid inlet cavity A, a second liquid return cavity B, a first liquid return cavity C, an upper layer negative pressure jet hole 6.1 and a lower layer negative pressure jet hole 7.1,
installing a jet flow suction pipe column 5 in the oil well casing 1, and installing a first washable well packer 4, a second washable well packer 10 and a K344 interval packer 8 on the jet flow suction pipe column 5 so that two oil reservoirs are separated; an upper oil deposit II suction pipe column 6 is arranged in an inner cavity of a jet suction pipe column 5, a lower oil deposit I suction pipe column 7 is arranged in an inner cavity of the upper oil deposit II suction pipe column 6, an upper negative pressure jet hole 6.1 and a split liquid inlet overflowing device 9 are arranged between the jet suction pipe column 5 and the upper oil deposit II suction pipe column 6 and positioned at the upper oil deposit II, a pipe column blocking end cover 23 is arranged between the bottom of the upper oil deposit II suction pipe column 6 and the lower oil deposit I suction pipe column 7, a liquid inlet check valve 2 is connected to the lower side of the lower oil deposit I suction pipe column 7, a lower negative pressure jet hole 7.1 is arranged between the liquid inlet check valve 2 and the lower oil deposit I suction pipe column 7, a lower liquid inlet opening valve 22 is arranged in the liquid inlet check valve 2, and a bottom butt joint device 3 is arranged at; a liquid inlet cavity A is formed between the jet flow suction pipe column 5 and the upper layer oil deposit II suction pipe column 6, a second liquid return cavity B is formed between the bottom of the upper layer oil deposit II suction pipe column 6 and the lower layer oil deposit I suction pipe column 7, and the inner cavity of the lower layer oil deposit I suction pipe column 7 is a first liquid return cavity C;
the bottom layer butt-joint device 3 and the pipe column blocking end cover 23 communicate the bottom of the liquid inlet cavity A to the first liquid return cavity C through the lower layer negative pressure jet hole 7.1; the liquid inlet cavity A is communicated with the second liquid return cavity B through an upper-layer negative pressure jet hole 6.1;
the top of the liquid inlet cavity A is connected to a high-pressure injection pump 18 through a valve d and is communicated to a high-pressure pump liquid supply tank 21 through an injection liquid supply pipeline 19; the upper end of the second liquid return cavity B is communicated to the bottom of the high-pressure pump liquid supply tank 21 and an external pipeline through a valve and a pipeline, and the top of the first liquid return cavity C is communicated to the high-pressure pump liquid supply tank 21 and the external pipeline through a valve and a pipeline.
Referring to fig. 2, the top of an oil well casing 1 of the invention is connected to a large four-way 12 through a casing flange 11, a hanger 13 is arranged on the inner side of the upper part of the large four-way 12, a jet flow four-way 14 is arranged on the top of the large four-way 12, a suction four-way 15 is arranged on the upper part of the jet flow four-way 14, and a bottom layer liquid outlet joint 16 is arranged on the top of the suction four-way 15.
Referring to fig. 2, a well-flushing liquid inlet hole d is formed in the outer side of the large four-way 12, a hanger 13 on the inner side of the upper portion of the large four-way 12 is used for fixedly connecting the top end of the jet flow suction pipe column 5, and the well-flushing liquid inlet hole d is connected to a high-pressure injection pump 18 and a high-pressure pump liquid supply tank 21 in parallel through an injection pipeline 17.
Referring to fig. 2, the bottom of the jet four-way joint 14 is fixedly connected to the top of the large four-way joint 12, a liquid inlet hole is formed in the outer wall of the jet four-way joint 14, and the jet four-way joint is connected to a high-pressure injection pump 18 and a high-pressure pump liquid supply tank 21 through a valve d and an injection pipeline; the top of the jet flow cross-joint 14 is fixed on the top of the upper oil deposit II suction pipe column 6.
Referring to fig. 2, the bottom of the suction four-way joint 15 is fixed on the top of the jet four-way joint 14, the top of the suction four-way joint 15 is provided with a bottom liquid outlet joint 16, and the outer wall of the suction four-way joint 15 is provided with a liquid outlet and is connected to a high-pressure pump liquid supply tank 21 through a valve e and a valve f.
Referring to fig. 2, the bottom liquid outlet joint 16 is provided with a liquid outlet at the center, and is connected to the high pressure pump liquid supply tank 21 through a valve k, a pipeline and a valve h, and is connected to the external discharge pipeline through a valve j.
Referring to fig. 3, the split liquid inlet flowing device 9 of the invention comprises a body 9.1, a one-way valve 9.2, a liquid inlet hole 9.3 and a central hole 9.4, the body 9.1 is a circular ring structure, the center of the body 9.1 is provided with a central hole 9.4, a plurality of one-way valves 9.2 are arranged in the body 9.1, liquid can realize one-way flow from outside to inside, a plurality of liquid passing holes 9.3 which are communicated up and down are arranged on the body 9.1, the split liquid inlet and flow passing device 9 is arranged at the upper layer oil deposit II, and is installed in the annulus between the jet flow suction pipe column 5 and the upper reservoir II suction pipe column 6 on the upper side of the K344 interval packer 8, and is sealed by a rubber ring, and in addition, through holes are respectively arranged on the jet flow suction pipe column 5 and the upper layer oil deposit II suction pipe column 6 and are correspondingly arranged with the one-way valves 9.2, so that oil-water liquid of the upper layer oil deposit II sequentially passes through the jet flow suction pipe column 5, the one-way valves 9.2 of the split liquid inlet flow passing device 9 and the upper layer oil deposit II suction pipe column 6 to enter the second liquid return cavity B; and a plurality of through holes 9.3 that link up from top to bottom that are equipped with on body 9.1 are for realizing that the induced drawing liquid of feed liquor chamber A passes along through liquid hole 9.3, are used for when the exploitation of lower floor's oil deposit I, induced drawing liquid sprays downwards along feed liquor chamber A to spout to first liquid return chamber C from lower floor's negative pressure jet hole 7.1, realize the exploitation of lower floor's oil deposit I.
Preferably, a valve above the second return cavity B is opened, the liquid inlet cavity A enters the second return cavity B through the upper negative pressure jet hole 6.1 to form negative pressure, the flow dividing liquid inlet overflowing device 9 is driven to be opened, oil of the upper oil reservoir II is taken out, and the oil is lifted to a well head along the second return cavity B.
Referring to fig. 1, the lower liquid inlet opening valve 22 of the present invention may be a steel ball, when the lower oil reservoir I is mined, the induced liquid is injected to the first liquid return chamber C through the lower negative pressure jet hole 7.1 downward along the liquid inlet chamber a, the formed negative pressure opens the steel ball, and drives the oil and water liquid of the oil reservoir I along and again along the first liquid return chamber C.
In addition, it should be noted that: the upper negative pressure jet hole 6.1 and the lower floor negative pressure jet hole 7.1 adopt by the outside to the aperture of inboard slope, have realized the function of spraying under the high pressure effect, form powerful negative pressure at the inner chamber, lure the drawing liquid as power liquid, under powerful negative pressure effect, the oil water liquid in the oil deposit opens reposition of redundant personnel feed liquor overflow ware 9 to mix with luring the drawing liquid, and is taken to ground and realizes jet oil recovery.
Still, first washable well packer 4, second washable well packer 10 adopt Y341 washable well packer, K344 interval packer 8 then can realize packing when luring the drawing liquid to suppress, it can lead to liquid from top to bottom to lure the drawing liquid not to suppress, two current washable well packer cooperation K344 interval packers 8 like this, make the flushing liquid can pass through first washable well packer 4, second washable well packer 10 and K344 interval packer 8, the annular space along sleeve pipe and efflux suction tubular column 5 gets into downhole, realize the well-flushing function.
The invention relates to a construction method of a petroleum layered oil extraction device, in particular to a construction method of a jet type layered oil extraction device, which comprises the following steps of underground pipe column construction and ground control part construction, wherein the underground pipe column construction comprises the following steps:
after a liquid inlet check valve 2, a bottom layer butting device 3, a first washable well packer 4, a jet flow suction pipe column 5, a K344 interval packer 8, a split liquid inlet overflowing device 9 and a second washable well packer 10 are put into a designed position in an oil well casing 1, the top of the jet flow suction pipe column 5 is connected with a hanger 13, the hanger 13 is fixed on a large four-way joint 12, the fixation of the jet flow suction pipe column 5 is completed firstly, and the bottom of the jet flow suction pipe column 5 is connected with the bottom layer butting device 3;
secondly, after the jet flow suction pipe column 5 is fixed, the upper layer oil deposit II suction pipe column 6 is put into the underground along the inner cavity of the jet flow suction pipe column 5, the top of the upper layer oil deposit II suction pipe column 6 is connected to the jet flow cross 14, the jet flow cross 14 is arranged on the upper sides of the large cross 12 and the hanger 13, after the jet flow cross 14 is arranged on the large cross 12 and the hanger 13, the large cross 12 is connected with the jet flow cross 14 through a connecting bolt, and the bottom of the upper layer oil deposit II suction pipe column 6 is connected with a pipe column blocking end cover 23, so that a liquid inlet cavity A is formed between the jet flow suction pipe column 5 and the upper layer oil deposit II suction pipe column 6;
thirdly, a lower layer oil deposit I suction pipe column 7 is put into the underground along the inner cavity of an upper layer oil deposit II suction pipe column 6 and is put to a set position, the top of the lower layer oil deposit I suction pipe column is connected with a suction four-way joint 15 and a bottom layer liquid outlet joint 16, the bottom of the lower layer oil deposit I suction pipe column is connected with a liquid inlet check valve 2, the suction four-way joint 15 is arranged above a jet flow four-way joint 14, and the bottom layer liquid outlet joint 16 is arranged; thus, a cavity formed between the jet flow suction pipe column 5 and the upper oil deposit II suction pipe column 6 is a second liquid return cavity B, and an inner cavity of the upper oil deposit II suction pipe column 6 is a first liquid return cavity C;
in addition, the ground control part construction includes:
firstly, a well washing liquid inlet hole d is arranged on one side of a large four-way joint 12 of a well mouth, and the well washing liquid inlet hole d is connected to a high-pressure injection pump 18 through a valve c and an injection pipeline 17 and is connected to a high-pressure pump liquid supply tank 21 through a valve a;
secondly, a liquid inlet hole is formed in the outer wall of the jet flow four-way joint 14 and is connected to a high-pressure injection pump 18 and a high-pressure pump liquid supply tank 21 through a valve d and an injection pipeline 17;
a liquid outlet is arranged on the outer wall of the suction four-way joint 15, and is connected to a high-pressure pump liquid supply tank 21 through a valve e and a valve f, and is connected with an external discharge pipeline through a valve g;
and fourthly, a liquid outlet is arranged in the center of the bottom layer liquid outlet joint 16, and is connected to the high-pressure pump liquid supply tank 21 through a valve k, a pipeline and a valve h, and is connected to an external discharge pipeline through a valve j.
The invention relates to a using method of a petroleum stratified oil production device, namely a using method of a jet type stratified oil production device, which comprises second-layer oil production, first-layer oil production and well flushing,
the first and second layer oil extraction comprises the following processes: injecting an induced liquid into the high-pressure liquid supply tank 21, opening a valve a, supplying liquid through a high-pressure injection pump 18, setting a downhole packer, sequentially opening valves d, e, f and g, allowing the high-pressure liquid to enter a liquid inlet cavity A through the valve d, allowing the induced liquid to flow downwards along the liquid inlet cavity A and to be sprayed to a second liquid return cavity B through an upper-layer negative pressure jet hole 6.1, allowing the formed negative pressure to drive oil and water of the oil reservoir II to flow upwards along the second liquid return cavity B through the valve e, allowing one part of the oil and water to enter the high-pressure liquid supply tank 21 through the valve f, and allowing the other part of the oil and water to enter an external discharge pipeline through the valve g to form a second-layer oil extraction, and closing the valves k, h and j all the time in the process;
the first layer oil extraction comprises the following processes: when oil extraction needs to be carried out on the oil reservoir I, a valve a is opened, liquid is supplied through a high-pressure injection pump 18, an underground packer is sealed, then valves d, k, h and j are opened in sequence, high-pressure liquid enters a liquid inlet cavity A through the valve d, drawing liquid is downward along the liquid inlet cavity A and is sprayed to a first liquid return cavity C through a lower-layer negative-pressure jet hole 7.1, a formed negative pressure opens a steel ball, oil and water liquid of the oil reservoir I is driven to pass through the valve k upwards along the first liquid return cavity C, one part of the oil and water liquid enters a high-pressure pump liquid supply box 21 through the valve h, the other part of the oil and water liquid enters an external discharge pipeline through the valve j to form a first-layer oil extraction layer, and the valves e, f and g are closed all;
thirdly, the well washing process comprises the following steps:
when the liquid is thick and the underground pipe column is blocked, namely the well is required to be washed, the valves b, c and L are opened, and the well washing liquid can be specially supplied to the high-pressure injection pump 18 for well washing through the control valve b;
when the well is washed, the flow direction of the liquid is as follows: the liquid enters the annular space of the sleeve and the jet flow suction pipe column 5 through a valve b → a high-pressure injection pump 18 → a valve c, passes through a second washable well packer 10, a K344 interval packer 8 and a first washable well packer 4, and then passes through a check valve 2 → a lower layer negative pressure jet hole 7.1 → a liquid inlet cavity A to realize the cleaning of the liquid inlet cavity A, and at the moment, valves e, f and g and valves K, h and j are closed;
after the liquid inlet cavity A is washed, the valves e and g are opened, the valve L is closed, the second liquid return cavity B is washed, and the washing liquid is discharged through the connection of an external discharge pipeline;
after the second liquid return cavity B is cleaned, the valves k and j are opened, the valves e and g are closed, the first liquid return cavity C is cleaned, and cleaning liquid is discharged through the connection of an external discharge pipeline, so that the whole cleaning of the underground pipe column is completed.
referring to the attached drawing 5, the lower liquid inlet opening valve 22 adopted by the invention comprises a floating valve 22.1, a valve body 22.2, rubber 22.3, a positioning pin 22.4, a return spring 22.5, a liquid passing channel 22.6 and a liquid supply zone 22.7, wherein the liquid supply zone 22.7 with a conical structure is arranged in an inner cavity of the lower side of the valve body 22.2, the positioning pin 22.4 and the return spring 22.5 are arranged in the middle of the liquid supply zone 22.7, the liquid passing channels 22.6 are arranged on the outer side of the liquid supply zone 22.7, the bottom of each liquid passing channel 22.6 is communicated with a cavity of the liquid supply zone 22.7, the top of each liquid passing channel is connected with the floating valve 22.1 through rubber 22.3, the floating valve 22.1 is in a conical structure, and the bottom of each floating valve is connected with the positioning pin 22.4 through the.
When the oil reservoir I is exploited, a valve a is opened, liquid is supplied through a high-pressure injection pump 18, an underground packer is sealed, then valves d, k, h and j are opened in sequence, high-pressure liquid enters a liquid inlet cavity A through the valve d, induced liquid flows downwards along the liquid inlet cavity A and is sprayed to a first liquid return cavity C through a lower-layer negative-pressure jet hole 7.1, the formed negative pressure drives oil liquid of the oil reservoir I to open a lower-layer liquid inlet opening valve 22, the oil liquid passes through the valve k upwards along and then along the first liquid return cavity C, one part of the oil liquid enters a high-pressure pump liquid supply tank 21 through the valve h, the other part of the oil liquid enters an external discharge pipeline through the valve j to form a first-layer oil extraction, and the valves e, f and g are closed all the time;
wherein, the oil water liquid passes through the liquid supply area 22.7 with a conical structure, and because the floating valve 22.1 is in a conical structure, the floating valve 22.1 is opened under the driving of negative pressure formed by the lower layer negative pressure jet hole 7.1 as a nozzle, so that the oil water liquid enters the first liquid return cavity C through the plurality of liquid passing channels 22.6 and is mixed with the power liquid to be produced out of the ground; in addition, after the floating valve 22.1 is opened, the return spring 22.5 is pulled, when the suction liquid stops injecting, the return spring 22.5 pulls the floating valve 22.1 back again, and the plurality of liquid passing channels 22.6 are sealed through the rubber 22.3.
referring to the attached figure 4, the jet flow suction pipe column 5 and the upper layer oil deposit II suction pipe column 6 can be connected with a power injection joint 24, the power injection joint 24 comprises an upper joint 24.1, injection holes 24.2, a lower joint 24.3 and a diffusion cavity 24.4, a plurality of injection holes 24.2 are arranged between the upper joint 24.1 and the lower joint 24.3, the injection holes 24.2 are obliquely arranged from outside to inside, the diffusion cavity 24.4 is arranged in the inner cavity of the upper joint 24.1 and is provided with internal threads to facilitate connection, and external threads are arranged on the outer wall of the lower joint 24.3 to facilitate connection of the jet flow suction pipe column (5) or the upper layer oil deposit II suction pipe column (6).
During the use, upper strata negative pressure jet hole (6.1), lower floor's negative pressure jet hole (7.1) among the replacement embodiment 1 and 2 can threaded connection on efflux suction pipe post (5) and upper reservoir II suction pipe post (6), and the adjusting position and the installation of being convenient for are more convenient during the construction.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (4)
1. The application method of the petroleum layered extraction device is characterized by comprising a second layer oil extraction, a first layer oil extraction and a well washing,
the first and second layer oil extraction comprises the following processes: injecting induced liquid into a high-pressure liquid supply tank (21), opening a valve a, supplying liquid through a high-pressure injection pump (18), sealing a downhole packer, sequentially opening valves d, e, f and g, allowing the high-pressure liquid to enter a liquid inlet cavity (A) through the valve d, allowing the induced liquid to flow downwards along the liquid inlet cavity (A) and be sprayed to a second liquid return cavity (B) through an upper-layer negative pressure jet hole (6.1), allowing the formed negative pressure to drive oil and water in an oil reservoir II to flow upwards along the second liquid return cavity (B) through the valve e, allowing one part of the oil and water to enter the high-pressure pump liquid supply tank (21) through the valve f, and allowing the other part of the oil and water to enter an external discharge pipeline through the valve g to form a second-layer oil extraction process, and closing the valves k, h and j all the time;
the first layer oil extraction comprises the following processes: when oil extraction needs to be carried out on the oil reservoir I, a valve a is opened, liquid is supplied through a high-pressure injection pump (18), an underground packer is sealed, then valves d, k, h and j are opened in sequence, high-pressure liquid enters a liquid inlet cavity (A) through the valve d, induced liquid is downward along the liquid inlet cavity (A) and is sprayed to a first liquid return cavity (C) through a lower-layer negative-pressure jet hole (7.1), the formed negative pressure drives oil and water of the oil reservoir I to upwards pass through the valve k along the first liquid return cavity (C), one part of the oil and water enters a high-pressure pump liquid supply tank (21) through the valve h, the other part of the oil and water enters an external discharge pipeline through the valve j to form first-layer oil extraction, and the valves e, f and g are closed all the time;
thirdly, the well washing process comprises the following steps:
when the liquid is thick and the underground pipe column is blocked, namely the well is required to be washed, the valves b, c and L are opened, and the well washing liquid can be specially supplied to the high-pressure injection pump 18 for well washing through the control valve b;
when the well is washed, the flow direction of the liquid is as follows: the cleaning agent enters an annular space of a sleeve and a jet flow suction pipe column (5) through a valve b → a high-pressure injection pump (18) → valve c, passes through a second washable well packer (10), a K344 interval packer (8) and a first washable well packer (4), and then passes through a liquid inlet check valve (2) → lower-layer negative pressure jet hole (7.1) → liquid inlet cavity (A) to clean the liquid inlet cavity (A), and at the moment, valves e, f and g and valves K, h and j are closed;
after the liquid inlet cavity (A) is washed, the valves e and g are opened, the valve L is closed, the second liquid return cavity (B) is washed, and the washing liquid is discharged through the connection of an external discharge pipeline;
after the second liquid return cavity (B) is cleaned, the valves k and j are opened, the valves e and g are closed, the first liquid return cavity (C) is cleaned, and cleaning liquid is discharged through the connection of an external discharge pipeline, so that the whole underground pipe column is cleaned.
2. The method of using a petroleum zonal recovery apparatus as claimed in claim 1, wherein: and opening a valve above the second liquid return cavity (B), enabling the liquid inlet cavity (A) to enter the second liquid return cavity (B) through an upper-layer negative pressure jet hole (6.1) to form negative pressure, driving the flow dividing liquid inlet overflowing device (9) to be opened, bringing out oil of the upper-layer oil reservoir II, and lifting the oil to a well head along the second liquid return cavity (B).
3. The method of using a petroleum zonal recovery apparatus as claimed in claim 1, wherein: the lower layer liquid inlet opening valve (22) can adopt a steel ball.
4. The method of using a petroleum zonal recovery apparatus as claimed in claim 1, wherein: lower floor's feed liquor open valve (22) is including floating valve (22.1), valve body (22.2), rubber (22.3), locating pin (22.4), return spring (22.5), cross liquid passageway (22.6) and supply liquid district (22.7), the downside inner chamber of valve body (22.2) is equipped with the confession liquid district (22.7) of toper structure, and the middle part of supplying liquid district (22.7) is equipped with locating pin (22.4) and return spring (22.5), is equipped with a plurality of liquid passageways (22.6) of crossing in the outside of supplying liquid district (22.7), crosses the bottom of liquid passageway (22.6) and supplies the cavity intercommunication of liquid district (22.7), and the top is passed through rubber (22.3) and is connected with floating valve (22.1), floating valve (22.1) are the toper structure, and the bottom is connected at locating pin (22.4) through return spring (22.5).
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