CN114482943A - Layered polymer injection pipe column for layered sand control well and use method - Google Patents
Layered polymer injection pipe column for layered sand control well and use method Download PDFInfo
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- CN114482943A CN114482943A CN202011167811.2A CN202011167811A CN114482943A CN 114482943 A CN114482943 A CN 114482943A CN 202011167811 A CN202011167811 A CN 202011167811A CN 114482943 A CN114482943 A CN 114482943A
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- 229920000642 polymer Polymers 0.000 title claims abstract description 137
- 238000002347 injection Methods 0.000 title claims abstract description 121
- 239000007924 injection Substances 0.000 title claims abstract description 121
- 239000004576 sand Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- -1 polytetrafluoroethylene Chemical group 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Chemical group 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Chemical group 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000001012 protector Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000002265 prevention Effects 0.000 abstract description 3
- 239000011229 interlayer Substances 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000002356 single layer Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 210000002445 nipple Anatomy 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to an underground layered polymer injection device and method, in particular to a layered polymer injection pipe column of a layered sand control well and a using method. The device comprises a plug, an electro-hydraulic integrated polymer preparation device, a penetrating type sealing plug, a hydraulic control pipeline, an armored cable, a sand prevention casing pipe, a polymer injection oil pipe, a positioner, a sand prevention layered packer, a sand filter pipe and a plurality of pressure sensors. The invention adopts a single-pipe layered injection mode, all matched tools adopt a small-diameter design, a single-layer polymer distributor adopts a hydraulic-electric mixing mode to control the opening degree, an interlayer packer adopts a multi-pipe crossing mode, an electric control adjustment liquid path is adopted to provide hydraulic pressure for an underground tool, a circuit board is used for controlling a direct-current stepping motor to rotate forward and backward, a liquid flow path is changed, and finally the flow control of each oil-water layer is realized through a ground hydraulic control pipeline and a signal cable.
Description
Technical Field
The invention relates to an underground layered polymer injection device and method, in particular to a layered polymer injection pipe column of a layered sand control well and a using method.
Background
The polymer injection oil recovery is a method in a tertiary oil recovery process, so that the production efficiency of old oil wells in oil fields is greatly improved, a double-tube or multi-tube polymer injection process is adopted at present, namely double tubes or multiple tubes are put into an oil well casing, the oil-water well sand control is mainly based on gravel filling and mechanical hanging filtration at present, the inner diameter of the 7-inch casing after sand control is less than 100mm, particularly gravel filling sand control, the inner diameter of a reserved well after filling is less than 100mm and is limited by the inner diameter of the oil-water well sand control casing, the more inner tubes are filled into the casing, the smaller the inner diameter of each inner tube is, the injection efficiency is reduced, the shearing of polymers is more serious, the small-diameter design of a layered polymer injection pipe column is needed for better realizing benefit development and improving the injection viscosity of the polymers.
Meanwhile, the inner diameter of the casing after the layered sand prevention is limited, and at present, no electromagnetic valve with relevant size exists, so that certain difficulty is brought to the realization of intelligent layered polymer injection in a 7-in casing shaft.
Chinese patent application CN110984934A discloses a use method of a hydraulic control testing and adjusting integrated device for a polymer injection well, which is characterized in that a plurality of polymer injection pipes are connected under a hanger of a well mouth, a crossing packer is connected on each polymer injection pipe, a fixing clamp sleeve is arranged below the crossing packer, and a polymer injection device and a tester are connected below the fixing clamp sleeve; the next layer is connected with a polymer injection pipe below the polymer injection device and is connected with a next group of crossing packers, fixed cutting sleeves, polymer injection devices and testers through the polymer injection pipe; to the bottom artificial bottom hole; one or more than one hydraulic control pipeline and a polymer injection test lead are arranged in the annular space between the oil well casing and the polymer injection pipe. The device realizes opening the polymer injection devices at different positions by arranging the independent hydraulic control pipelines, thereby avoiding the reduction of polymer injection efficiency caused by putting a plurality of polymer injection pipes into an oil well casing, but the method does not consider the following aspects: (1) when 2 layers of polymer injection need to be controlled, the number of pipelines in the well reaches 4 (2 hydraulic control pipelines +2 testing pipelines), and the construction is quite complex; (2) the joints of pipelines and tools are more, the underground environment is complex, uncontrollable factors are increased, and the success rate of the hydraulic control separate layer mining pipe column is low.
Chinese patent application CN109356899A discloses a three-line six-level sliding sleeve downhole hydraulic system for downhole decoding control, which comprises a downhole hydraulic control system 1, a hydraulic control system 2, a hydraulic control system 3, a hydraulic control system 4, a hydraulic control system 5, a hydraulic control system 6 passing through the line 1, the line 2, three lines of the line 3 being connected with an injection system above the ground, and a ground secondary pressure control system passing through the line 1, the line 2, three lines of the line 3 being connected with the injection system, adjusting the secondary pressure control system to control the output pressure of the line, adjusting the hydraulic control system to realize the independent displacement of the sliding sleeve. However, the three hydraulic control pipelines are still complex to operate in practical application, and are not suitable for application under the condition of non-six layers due to the unique six-layer limitation of the system, and the application flexibility is limited.
Chinese patent application CN104563961A discloses a miniature motorised valve for hydraulic control in pit, it includes valve body and valve rod, power input device is connected to the one end of valve rod, is provided with a plurality of sealing members along the axial interval between valve rod and valve opening inner wall, separates into a plurality of annular spaces between valve rod and the valve body, is provided with two at least radial holes along the axial direction interval in one side of valve body, and each radial hole corresponds and is linked together with an annular space, is provided with an annular concave part along the axial direction at least on the valve rod, annular concave part enables two adjacent annular spaces to be linked together. The electric valve has simple structure, small volume and high pressure resistance, and can be used in the working environment of ultrahigh pressure and narrow space in the well; the direction control of the switch sliding sleeve is realized during the construction of the oil-gas well subsection measure, the underground liquid pressure is used as the reversing power, the influence of underground high pressure and narrow space is overcome, and the subsection measure operation time can be greatly shortened. However, the liquid outlet is in the radial direction, the liquid inlet is easy to collide and damage, the electric control force is small, the valve rod is easy to push immovably in the later development stage, and the liquid outlet is difficult to be applied and popularized in a complex underground field.
Therefore, at present, a single-pipe polymer injection device and a single-pipe polymer injection process suitable for a layered sand control well are still needed to be designed independently, a multi-layer position polymer injection process in a sand control pipe column can be realized, the inner diameter of the polymer injection pipe does not need to be reduced, and the polymer injection efficiency is not reduced.
Disclosure of Invention
The invention mainly aims to provide a layering polymer injection pipe column of a layering sand control well and a using method; the single-pipe layered injection mode is adopted, all matched tools adopt small-diameter design, the single-layer polymer distributor adopts a liquid-electricity mixing mode to control the opening degree, the interlayer packer adopts a multi-pipe crossing mode, an electric control liquid adjusting path is adopted to provide hydraulic pressure for the underground tool, a circuit board is used for controlling the direct current stepping motor to rotate forward and backward, a liquid flow path is changed, and finally the flow control of each oil-water layer is realized through one ground hydraulic control pipeline and one signal cable.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a layered polymer injection tubular column of a layered sand control well, which comprises a plug, an electro-hydraulic integrated polymer distributor, a penetrating type sealing plug, a hydraulic control pipeline, an armored cable, a sand control sleeve, a polymer injection oil pipe, a positioner, a sand control layered packer and a sand filter pipe, wherein the plug is arranged on the outer wall of the tubular column; the sand control casing, the sand control layered packer and the sand filter pipe form a sand control pipe column on the outer wall, the pipe plug, the electrohydraulic integrated polymer distributor, the penetrating type sealing plug, the hydraulic control pipeline, the armored cable, the polymer injection oil pipe and the positioner form an internal polymer injection pipe column, the two pipe columns are concentrically arranged, the sand control layered packer seals each oil layer, the sand filter pipe is aligned with each oil layer, the sand control casing is connected with the sand control layered packer and the sand filter pipe, the pipe plug is arranged at the bottommost end of the polymer injection pipe column, the penetrating type sealing plug is used for sealing the oil layers of the polymer injection pipe column, the electrohydraulic integrated polymer distributor is arranged between every two penetrating type sealing plugs, the positioner is arranged at the top end of the polymer injection pipe column tool string, and the hydraulic control pipeline and the armored cable are connected with the electrohydraulic integrated polymer injector in series at each stage, and finally, the liquid electric control cabinet is connected to the ground.
Furthermore, the separate-layer sand control well separate-layer polymer injection pipe column also comprises a pressure sensor; the part of the pressure sensors are connected with the electro-hydraulic integrated distributor and the hydraulic control pipeline and used for testing the pressure value at the connection position of the hydraulic control pipeline of the electro-hydraulic integrated distributor; a part of pressure sensors are arranged at the outer end of the electrohydraulic integrated polymer distributor and fixed through a protection device, and are used for testing the pressure value at the outer end of the electrohydraulic integrated polymer distributor; the armored cable is connected with all the pressure sensors.
Further, the electrohydraulic integrated polymer injector comprises a lower joint, a spring seat, a lower spring, a bearing, a track fixing sleeve, a track pin, a track sleeve, a lower connecting sleeve, a middle connecting sleeve, a polymer injection outer hole, a sliding sleeve, an upper connecting sleeve, an inner connecting rod, a gasket, an upper spring, an outer sleeve, a piston, an upper joint, a stop ring, a variable center sleeve 1, a quick joint 1, a connecting short section 1, a large plug, a supporting sleeve, a small plug, a core shaft, a body, a pin, a motor, a control circuit board, a cable joint, a connecting short section 2, a quick joint 2 and a variable center sleeve 2; a step is arranged in the lower joint, the step is provided with the spring seat, the lower spring is arranged on the spring seat, and the bearing is arranged at the upper end of the lower spring; the lower connecting sleeve is in threaded connection with the lower joint; the track fixing sleeve and the track sleeve are movably connected by the track pin and are arranged at the upper end of the bearing together after being assembled; the middle connecting sleeve is in threaded connection with the lower connecting sleeve, the middle connecting sleeve is provided with a polymer injection outer hole, and the upper connecting sleeve is in threaded connection with the middle connecting sleeve and the outer sleeve respectively; the sliding sleeve is in threaded connection with an inner connecting rod, a step is arranged outside the inner connecting rod, and a gasket, an upper spring and a gasket are sequentially arranged on the upper part of the step from bottom to top; the piston is in threaded connection with the inner connecting rod, and the baffle ring is in threaded connection with the inner part of the upper end of the piston; the assembled sliding sleeve, the inner connecting rod, the gasket, the spring, the piston and the baffle ring are placed in the outer sleeve together and then are in threaded connection with the inner part of the upper end of the outer sleeve through the upper joint; the variable center sleeve 1 is in threaded connection with the upper joint, the quick joint 1 is firstly sleeved on the outer wall of the connecting short section 1, then the connecting short section 1 is in threaded connection with the body, and then the quick joint 1 is in quick threaded connection with the variable center sleeve 1; the connecting short section 2 is in threaded connection with the body, the quick connector 2 is firstly sleeved on the outer wall of the connecting short section 2, then the connecting short section 2 is in threaded connection with the body, and then the quick connector 2 is in quick threaded connection with the variable center sleeve 2;
an inner diameter-variable through hole is drilled on one side of the body, and a large plug, a support sleeve, a small plug, a sealing system and a mandrel are sequentially arranged in the through hole from bottom to top; the sealing system is placed in a sealing inner hole of the body, the supporting sleeve is placed at the lower end of the sealing system, the large plug is in threaded and rubber ring sealing connection with the body, the small plug is installed at the lower end of the mandrel and is in sealing connection with the rubber ring through threads, the motor is placed at the upper end of the mandrel and is connected through a pin, the circuit control board is placed at the upper end of the motor and is in sealing connection with the motor through a cable joint after being installed.
Furthermore, the sliding sleeve is in sealing contact with the inner surface and the outer surface of the middle connecting sleeve;
furthermore, a plurality of injection holes with different diameters are axially arranged on the sliding sleeve.
Furthermore, the lower joint and the lower connecting sleeve, the middle connecting sleeve and the lower connecting sleeve, the upper connecting sleeve and the middle connecting sleeve, the outer sleeve and the upper connecting sleeve, the upper joint and the outer sleeve, the variable center sleeve 1 and the upper joint, the short joint 1 and the body, the quick joint 1 and the variable center sleeve 1, the short joint 2 and the body, the quick joint 2 and the variable center sleeve 2, and the large plug and the body are sealed by rubber rings.
Furthermore, sealing systems are arranged between the inner connecting rod and the middle connecting sleeve, between the piston and the upper joint and between the inner connecting rod and the middle connecting sleeve and between the piston and the upper joint and on the body part, and each sealing system consists of a copper ring, polytetrafluoroethylene and a rubber ring;
furthermore, the diameter of the rubber ring is 5.3mm, and a fit clearance of 1.5-2mm is reserved in the axial direction of the sealing part of the sealing system;
furthermore, the copper ring is made of red copper; the polytetrafluoroethylene is graphite-doped polytetrafluoroethylene.
Furthermore, the threads at the joints of the lower joint and the lower connecting sleeve, the middle connecting sleeve and the lower connecting sleeve, the upper connecting sleeve and the middle connecting sleeve, the outer sleeve and the upper connecting sleeve and the upper joint and the outer sleeve are low-thread acme female trapezoidal threads.
Furthermore, a hydraulic control joint is arranged on the upper joint; the polymer injection outer holes and other injection channels are processed by rounding arcs, so that the shearing degree of the polymer is reduced.
Furthermore, a reserved pipeline channel, a conical plug hole, a balance channel, a pressurizing joint, a pressurizing channel, a pressure relief channel hole and a pressure relief + reserved pipeline channel are arranged on the body, all the joints and the channels are arranged in parallel, a proper conical sealing plug is arranged at the conical plug hole, and a proper hydraulic control pipeline joint is arranged at the pressurizing joint.
The invention also provides a use method of the layering polymer injection pipe column of the layering sand control well, which comprises the following steps: sequentially putting the sand control pipe column on the outer wall and the layered polymer injection pipe column on the inner wall, and connecting the layered polymer injection pipe columns in series according to polymer injection levels; when each stage of the electro-hydraulic integrated polymer distributor is connected, the hydraulic control pipeline tee joint and the armored cable tee joint are respectively connected to a pressing joint and a cable joint of the electro-hydraulic integrated polymer distributor, the hydraulic control pipeline and the armored cable of the main channel all go through the reserved pipeline 1 channel and the pressure relief + reserved pipeline channel, then the pressing joint and the hydraulic control joint are connected through the hydraulic control pipeline, whether the conical plug hole is matched with the corresponding plug or not is checked on site, the hydraulic control pipeline and the armored cable are protected on the outer wall of the oil pipe through the corresponding protector, and finally the hydraulic control pipeline and the armored cable are connected to a ground control center.
Further, during daily injection, a ground control center sends an instruction and supplies power to a motor to push the mandrel to move, when the electrohydraulic integrated polymer distributor of the control layer needs to be pressurized, the mandrel is pushed to a determined pressurizing position, the pressurizing joint keeps smooth, then the pressurizing control is carried out through a hydraulic control pipeline according to the amount of the injection, when certain pressure is reached, an upper spring and a lower spring are compressed to continue to improve the pressure, the rail sleeve is sleeved on the rail fixing sleeve to move so as to drive the sliding sleeve to move up and down, the flow control is realized because the multistage injection holes with different sizes are arranged on the sliding sleeve, when the required flow is regulated, the motor is controlled to push the mandrel to a determined pressure stabilizing position, and thus the pressure condition of the electrohydraulic integrated polymer distributor of the layer cannot be influenced by the pressurizing and pressure relief of other layers; if the electro-hydraulic integrated polymer distributor on the layer needs to be closed, the motor is controlled, the mandrel is pushed to the determined pressure relief position, and the hydraulic control pressure can be quickly released and closed;
furthermore, when the hydraulic control pressure change track is adjusted, the pressure sensor is used for testing the pressure, the change can be successful only when the required pressure is reached, and the failure probability of changing the track is reduced.
Compared with the prior art, the invention has the following advantages:
the electro-hydraulic integrated polymer injection device matched with the polymer injection pipe column is designed in a small diameter mode, and can meet the requirements of layered polymer injection in a layered sand control well; adopt the integrative control mode of liquid electricity, can enough solve the not enough problem of later stage regulation unmovable of power that pure electric control brought, can solve the more problem of liquid accuse pipeline that pure liquid accuse brought again.
By adopting the polymer injection pipe column, the real-time control of a plurality of layers by one cable and one pipeline can be realized, and simultaneously, a plurality of openings are arranged on each layer to realize the adjustment of a plurality of flows; meanwhile, the self-checking seal of the sealing plug can be realized, and the separation is ensured.
Different from the conventional polymer injection device, when the electro-hydraulic integrated polymer injection device is positioned at a pressure relief position, a larger overflow channel can be formed, and the requirement of large-discharge back washing can be met.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of a separate-zone polymer injection pipe column of a separate-zone sand control well according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an electro-hydraulic integrated distributor according to an embodiment of the present invention;
FIG. 3 is a sectional view taken along the line A-A of the electro-hydraulic integrated distributor body according to an embodiment of the present invention;
FIG. 4 is a sectional view taken along the line B-B of the electro-hydraulic integrated distributor body according to one embodiment of the present invention;
FIG. 5 is a C-C sectional view of the electro-hydraulic integrated distributor body according to one embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a hydraulic control principle according to an embodiment of the present invention;
FIG. 7 is a drawing of three different positions of the mandrel in accordance with one embodiment of the present invention;
fig. 8 is a schematic rail diagram of a rail fastening sleeve according to an embodiment of the invention.
In the figure, 1, a plug, 2, an electro-hydraulic integrated polymer distributor, 3, a sand filter pipe, 4, a through type sealing plug, 5, a sand control layered packer, 6, a sand control sleeve, 7, a polymer injection oil pipe, 8, a positioner, 9, an armored cable, 10, a hydraulic control pipeline, 201, a lower joint, 202, a spring seat, 203, a lower spring, 204, a bearing, 205, a track fixing sleeve, 206, a track pin, 207, a track sleeve, 208, a lower connecting sleeve, 209, a rubber ring 1, 210, a middle connecting sleeve, 211, a polymer injection outer hole, 212, a sliding sleeve, 213, an upper connecting sleeve, 214, a copper ring, 215, polytetrafluoroethylene, 216, a rubber ring 2, 217, an inner connecting rod, 218, a gasket, 219, an upper spring, 220, an outer sleeve, 221, a piston, 222, an upper joint, 223, a baffle ring, 224, a hydraulic control joint, 225, a variable center sleeve 1, 226, a quick joint 1, 227, 228, a large plug and a large plug are connected through type pipe, 229. The supporting sleeve 230, the small plug 231, the sealing system 232, the mandrel 233, the body 234, the pin 235, the motor 236, the control circuit board 237, the cable joint 238, the connection short section 2, the connection short section 239, the quick joint 2, the variable center sleeve 2; 2331. a pipeline 1 channel is reserved, 2332, a conical wire plugging hole, 2332a, 2332b, 2332c, 2332d, a conical wire plugging hole, 2333, a balancing channel; 2334. a pressure joint, 2334a, a pressure joint, 2335, a pressure channel, 2336, a pressure relief channel hole, 2337, a pressure relief + reserve line channel.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in figure 1, the single-pipe layered polymer injection string for the layered sand control well comprises a plug 1, an electro-hydraulic integrated polymer distributor 2, a penetrating type sealing plug 4, a hydraulic control pipeline 10, an armored cable 9, a sand control casing 6, a polymer injection oil pipe 7, a positioner 8, a sand control layered packer 5 and a sand filter pipe 3, wherein the sand control casing 6, the sand control layered packer 5 and the sand filter pipe 3 form the sand control string on the outer wall, the plug 1, the electro-hydraulic integrated polymer distributor 2, the penetrating type sealing plug 4, the hydraulic control pipeline 10, the armored cable 9, the polymer injection oil pipe 7 and the positioner 8 form the polymer injection string inside, the two strings are concentrically arranged, the sand control layered packer 5 seals each oil layer, the sand filter pipe 3 is aligned with each oil layer, the sand control casing 6 is connected with the layered packer 5 and the sand filter pipe 3, the plug 1 is arranged at the lowest end of the polymer injection string, and the penetrating type sealing plug 4 is used for the polymer injection string, an electro-hydraulic integrated polymer distributor is arranged between every two of the penetrating sealing plugs 4, the positioner 8 is arranged at the top end of the polymer injection pipe column tool string, and the hydraulic control pipeline 10 and the armored cable 9 are connected to the electro-hydraulic integrated polymer injector in series and finally connected to a ground hydraulic-electric control cabinet.
As shown in fig. 6, the pressure sensor 1, the pressure sensor 3, the pressure sensor 5, and the pressure sensor 7 are respectively disposed at a joint of a hydraulic control pipeline of each stage of the electrohydraulic integrated distributor, and the hydraulic control pipeline 10 sequentially connects the downhole pressure sensor 1, the pressure sensor 3, the pressure sensor 5, and the pressure sensor 7 to each stage of the electrohydraulic integrated distributor for testing a pressure value at a joint of the hydraulic control pipeline of each stage of the electrohydraulic integrated distributor, the pressure sensor 2, the pressure sensor 4, the pressure sensor 6, and the pressure sensor 8 are respectively disposed at outer ends of the electrohydraulic integrated distributor and fixed by a protection device for testing a pressure value at an outer end of each stage of the electrohydraulic integrated distributor, and all the pressure sensors are connected to the armored cable 9.
As shown in fig. 2, the electrohydraulic integrated injector comprises a lower joint 201, a spring seat 202, a lower spring 203, a bearing 204, a rail fixing sleeve 205, a rail pin 206, a rail sleeve 207, a lower connecting sleeve 208, a rubber ring 1209, a middle connecting sleeve 210, an injected outer hole 211, a sliding sleeve 212, an upper connecting sleeve 213, a copper ring 214, polytetrafluoroethylene 215, a rubber ring 2216, an inner connecting rod 217, a gasket 218, an upper spring 219, an outer sleeve 220, a piston 221, an upper joint 222, a collar 223, a hydraulic control joint 224, a variable center sleeve 1225, a quick joint 1226, a connecting short section 1227, a large plug 228, a supporting sleeve 229, a small plug 230, a sealing system 231, a mandrel 232, a body 233, a pin 234, a motor 235, a control circuit board 236, a cable joint 237, a connecting short section 8, a quick joint 2239, and a variable center sleeve 2240, wherein a step 223is arranged inside the lower joint 201, the spring seat 202 is arranged on the step, the spring seat 202 is arranged on the lower spring seat, the bearing 204 is placed at the upper end of the lower spring 203, the lower connecting sleeve 208 is in threaded connection with the lower connector 201, the track pin 206 movably connects the track fixing sleeve 205 and the track sleeve 207, the assembled bearing is placed at the upper end of the bearing 204 together, the middle connecting sleeve 210 is in threaded connection with the lower connecting sleeve 208, the middle connecting sleeve 210 is provided with a polymer injection outer hole 211, the upper connecting sleeve 213 is in threaded connection with the middle connecting sleeve 210, the outer sleeve 220 is in threaded connection with the upper connecting sleeve 213, the sliding sleeve 212 is in threaded connection with the inner connecting rod 217, the outer part of the inner connecting rod 217 is provided with a step, the upper part of the step is sequentially provided with the gasket 218, the upper spring 219 and the gasket 218 from bottom to top, the piston 221 is in threaded connection with the inner connecting rod 217, the baffle ring 223 is in threaded connection with the upper end of the piston 221, the assembled sliding sleeve 220, inner connecting rod 217, gasket 218, upper spring 219, piston 221 and baffle ring 223 are placed inside the outer sleeve 220 together, and the upper connector 222 is in threaded connection with the upper end of the outer sleeve 220, become central cover 1225 and top connection 222 threaded connection, quick-operation joint 1226 is first set in connection nipple 1227 outer wall, connection nipple 1227 and body 233 threaded connection, later quick-operation joint 1226 and become central cover 1225 quick threaded connection, connection nipple 2238 and body 233 threaded connection, quick-operation joint 2239 is first set in connection nipple 2238 outer wall, quick-operation joint 2239 and become central cover 2240 quick threaded connection.
The lower connector 201 and the lower connecting sleeve 208, the middle connecting sleeve 210 and the lower connecting sleeve 208, the upper connecting sleeve 213 and the middle connecting sleeve 210, the outer sleeve 220 and the upper connecting sleeve 213, the upper connector 222 and the outer sleeve 220, the variable center sleeve 1225 and the upper connector 222, the connecting short section 1227 and the body 233, the quick connector 1226 and the variable center sleeve 1225, the connecting short section 2238 and the body 233, the quick connector 2239 and the variable center sleeve 2240, and the large plug 228 and the body 233 are sealed through rubber rings 1209;
the outer surface of the sliding sleeve 212 and the inner surface of the middle connecting sleeve 210 are sealed by metal;
the sealing systems are arranged between the inner connecting rod 217 and the middle connecting sleeve 210, between the piston 221 and the upper joint 222 and between the inner connecting rod and the body 233, and consist of a copper ring 214, polytetrafluoroethylene 215 and a rubber ring 2216. The rubber ring 2216 is preferably a thick ring with the diameter of phi 5.3, and a fit clearance of 1.5-2mm is reserved in the axial direction of the multi-stage combined sealing part;
the upper joint 222 is provided with a hydraulic control joint 224;
the copper ring 214 is preferably made of red copper;
the polytetrafluoroethylene is preferably doped with graphite;
the screw thread at the joint of the lower joint 201 and the lower connecting sleeve 208, the middle connecting sleeve 210 and the lower connecting sleeve 208, the upper connecting sleeve 213 and the middle connecting sleeve 210, the outer sleeve 220 and the upper connecting sleeve 213, and the upper joint 222 and the outer sleeve 220 adopts a U-made Jack female trapezoidal screw thread;
the diameter of the electrohydraulic polymer distributor 2 is controlled to be phi 92.5mm, and the inner diameter is kept to be phi 42 mm;
the polymer injection outer hole and other injection channels are subjected to arc rounding treatment, so that the shearing degree of the polymer is reduced;
the motor and the control circuit board are made of high-temperature resistant materials, and the motor is preferably a direct-current stepping motor.
As shown in fig. 3, 4 and 5, an inner diameter-variable through hole is drilled on one side of a body 233, a large plug 228, a support sleeve 229, a small plug 230, a sealing system 231 and a mandrel 232 are sequentially arranged in the through hole from bottom to top, the sealing system 231 is arranged in a sealing inner hole of the body 233, the support sleeve 229 is arranged at the lower end of the sealing system 231, the large plug 228 is in threaded and rubber ring sealing connection with the body 233, the small plug 230 is arranged at the lower end of the mandrel 232, the small plug 230 is in threaded and rubber ring sealing connection with the mandrel 232, a motor 235 is arranged at the upper end of the mandrel 232 and is connected with the motor 235 through a pin 234, and a circuit control board 236 is arranged at the upper end of the motor 235 and is in sealing connection with the motor 235 through a cable joint 237 after installation.
The body 233 is provided with the reserved pipeline 1 channel 2331, the tapered plug hole 2332, the balance channel 2333, the pressurizing joint 2334, the pressurizing channel 2335, the pressure relief channel hole 2336 and the pressure relief + reserved pipeline channel 2337, all the joints and the channels are arranged in parallel, the tapered plug hole is provided with a proper tapered sealing plug, and the pressurizing joint is provided with a proper hydraulic control pipeline joint;
example 2
The use method of the single-pipe separate-layer polymer injection string for the separate-layer sand control well in the embodiment 1 comprises the following steps: the sand control pipe column on the outer wall and the layered polymer injection pipe column on the inner wall are sequentially put in, when each level of the electro-hydraulic integrated polymer distributor is connected, the sand control pipe column and the layered polymer injection pipe column are respectively connected to a pressurizing connector 2334 and a cable connector 237 of the electro-hydraulic integrated polymer distributor through a hydraulic control pipeline tee joint and an armored cable tee joint, a hydraulic control pipeline and an armored cable of a main channel completely run through a reserved pipeline 1 channel 2331 and a pressure relief + reserved pipeline channel 2337, then the pressurizing connector 2334a and the hydraulic control connector 224 are connected through the hydraulic control pipeline, whether the conical screwed plug holes 2332, 2332a, 2332b, 2332c and 2332d are matched with corresponding screwed plugs or not is checked on site, and the hydraulic control pipeline and the armored cable are protected on the outer wall of the oil pipe through corresponding protectors and are finally connected to a ground control center;
when the pressure of the electro-hydraulic integrated polymer distributor of the control layer is required to be pressed, the mandrel is pushed to the first position in the figure 7, namely the pressing position, the pressing joints 2334 and 2334a are unblocked, then the pressing control is carried out through a hydraulic control pipeline according to the size of the injection amount, when certain pressure is reached, the upper spring 219 and the lower spring 203 are compressed, the pressure is continuously improved, the track sleeve 207 moves on the track fixing sleeve 205, so that the sliding sleeve 212 is driven to move up and down, as the injection holes with different sizes are arranged on the sliding sleeve, the flow control is realized, when the required flow is regulated, the motor is controlled, the mandrel is pushed to the second position in the figure 7, namely the pressure stabilizing position, so that the pressure condition of the electro-hydraulic integrated polymer distributor of the control layer cannot be influenced by the pressing and pressure relief of other layers, if the electrohydraulic integration of this layer of joining in marriage and gather the ware when needing to close, the control motor pushes away the dabber to the third position of figure 7 namely the pressure release position, just can realize the quick release of liquid accuse pressure, close fast, it explains that, when adjusting liquid accuse pressure change track, can reference pressure sensor 1, pressure sensor 3, pressure sensor 5, pressure sensor 7's test pressure, can only reach required pressure and transform successfully, reduce change track failure probability.
Example 3
Taking three-layer polymer injection as an example, the specific flow rate adjusting mode of the single-pipe layered polymer injection pipe column for the layered sand control well in the embodiment 1 is as follows: according to a geological injection allocation scheme, a ground flowmeter is combined for displaying, a variable track is pressed through the ground, the lowest electro-hydraulic integrated injection allocation device is adjusted to a required injection allocation amount, then the electro-hydraulic integrated injection allocation device is pressed to a pressure stabilizing position, then the middle electro-hydraulic integrated injection allocation device is adjusted to the required injection allocation amount, then the electro-hydraulic integrated injection allocation device is pressed to the pressure stabilizing position, finally the highest electro-hydraulic integrated injection allocation device is adjusted to the required injection allocation amount, and then the electro-hydraulic integrated injection allocation device is pressed to the pressure stabilizing position, so that all levels of electro-hydraulic integrated injection allocation devices cannot influence the work with each other;
and during later maintenance (layered seal inspection): when the electro-hydraulic integrated polymer distributor is blocked and a large-discharge-capacity backwashing well is needed to wash the electro-hydraulic integrated polymer distributor, the electro-hydraulic integrated polymer distributor is adjusted to a pressure release position through an armored cable, and the large-discharge capacity backwashing can be realized through the ground well washing liquid reverse circulation, when the layering condition of the packer needs to be known, because the pressure sensor 2, the pressure sensor 4, the pressure sensor 6 and the pressure sensor 8 are arranged at the outer end of the electro-hydraulic integrated polymer distributor of each stage, the sealing effect of each stage of the penetrating type sealing plug 4 can be obtained in real time according to the upper and lower pressure change of the test.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (10)
1. A layered polymer injection tubular column of a layered sand control well is characterized by comprising a plug, an electro-hydraulic integrated polymer distributor, a penetrating type sealing plug, a hydraulic control pipeline, an armored cable, a sand control sleeve, a polymer injection oil pipe, a positioner, a sand control layered packer and a sand filter pipe; the sand control casing, the sand control layered packer and the sand filter pipe form a sand control pipe column on the outer wall, the pipe plug, the electrohydraulic integrated polymer distributor, the penetrating type sealing plug, the hydraulic control pipeline, the armored cable, the polymer injection oil pipe and the positioner form an internal polymer injection pipe column, the two pipe columns are concentrically arranged, the sand control layered packer seals each oil layer, the sand filter pipe is aligned with each oil layer, the sand control casing is connected with the sand control layered packer and the sand filter pipe, the pipe plug is arranged at the bottommost end of the polymer injection pipe column, the penetrating type sealing plug is used for sealing the oil layers of the polymer injection pipe column, the electrohydraulic integrated polymer distributor is arranged between every two penetrating type sealing plugs, the positioner is arranged at the top end of the polymer injection pipe column tool string, and the hydraulic control pipeline and the armored cable are connected with the electrohydraulic integrated polymer injector in series at each stage, and finally, the liquid electric control cabinet is connected to the ground.
2. The zonal polymer injection string of the zonal sand control well of claim 1, further comprising a pressure sensor; one part of the pressure sensors are connected with the electro-hydraulic integrated polymer distributor, are connected with the hydraulic control pipeline and are used for testing the pressure value at the connection position of the hydraulic control pipeline of the electro-hydraulic integrated polymer distributor; a part of pressure sensors are arranged at the outer end of the electrohydraulic integrated polymer distributor and fixed through a protection device, and are used for testing the pressure value at the outer end of the electrohydraulic integrated polymer distributor; the armored cable is connected with all the pressure sensors.
3. The layered polymer injection pipe column of the layered sand control well according to claim 1, wherein the electro-hydraulic integrated polymer injection device comprises a lower joint, a spring seat, a lower spring, a bearing, a rail fixing sleeve, a rail pin, a rail sleeve, a lower connecting sleeve, a middle connecting sleeve, a polymer injection outer hole, a sliding sleeve, an upper connecting sleeve, an inner connecting rod, a gasket, an upper spring, an outer sleeve, a piston, an upper joint, a retainer ring, a variable center sleeve 1, a quick joint 1, a connecting short section 1, a large plug, a supporting sleeve, a small plug, a mandrel, a body, a pin, a motor, a control circuit board, a cable joint, a connecting short section 2, a quick joint 2 and a variable center sleeve 2; a step is arranged in the lower joint, the step is provided with the spring seat, the lower spring is arranged on the spring seat, and the bearing is arranged at the upper end of the lower spring; the lower connecting sleeve is in threaded connection with the lower joint; the track fixing sleeve and the track sleeve are movably connected by the track pin and are arranged at the upper end of the bearing together after being assembled; the middle connecting sleeve is in threaded connection with the lower connecting sleeve, the middle connecting sleeve is provided with a polymer injection outer hole, and the upper connecting sleeve is in threaded connection with the middle connecting sleeve and the outer sleeve respectively; the sliding sleeve is in threaded connection with an inner connecting rod, a step is arranged outside the inner connecting rod, and a gasket, an upper spring and a gasket are sequentially arranged on the upper part of the step from bottom to top; the piston is in threaded connection with the inner connecting rod, and the baffle ring is in threaded connection with the inner part of the upper end of the piston; the assembled sliding sleeve, the inner connecting rod, the gasket, the spring, the piston and the baffle ring are placed in the outer sleeve together and then are in threaded connection with the inner part of the upper end of the outer sleeve through the upper joint; the variable center sleeve 1 is in threaded connection with the upper joint, the quick joint 1 is firstly sleeved on the outer wall of the connecting short section 1, then the connecting short section 1 is in threaded connection with the body, and then the quick joint 1 is in quick threaded connection with the variable center sleeve 1; the connecting short section 2 is in threaded connection with the body, the quick connector 2 is firstly sleeved on the outer wall of the connecting short section 2, then the connecting short section 2 is in threaded connection with the body, and then the quick connector 2 is in quick threaded connection with the variable center sleeve 2;
an inner diameter-variable through hole is drilled on one side of the body, and a large plug, a support sleeve, a small plug, a sealing system and a mandrel are sequentially arranged in the through hole from bottom to top; the sealing system is placed in a sealing inner hole of the body, the supporting sleeve is placed at the lower end of the sealing system, the large plug is in threaded and rubber ring sealing connection with the body, the small plug is installed at the lower end of the mandrel and is in sealing connection with the rubber ring through threads, the motor is placed at the upper end of the mandrel and is connected through a pin, the circuit control board is placed at the upper end of the motor and is in sealing connection with the motor through a cable joint after being installed.
4. The layered polymer injection string for the layered sand control well according to claim 3, wherein the sliding sleeve is in sealing contact with the inner surface and the outer surface of the intermediate connecting sleeve;
preferably, a plurality of injection holes with different diameters are axially arranged on the sliding sleeve.
5. The separate-layer polymer injection pipe column for the separate-layer sand control well according to claim 3, wherein the lower joint and the lower connecting sleeve, the middle connecting sleeve and the lower connecting sleeve, the upper connecting sleeve and the middle connecting sleeve, the outer sleeve and the upper connecting sleeve, the upper joint and the outer sleeve, the variable center sleeve 1 and the upper joint, the connecting short section 1 and the body, the quick joint 1 and the variable center sleeve 1, the connecting short section 2 and the body, the quick joint 2 and the variable center sleeve 2, and the large plug and the body are sealed by rubber rings.
6. The separate-layer polymer injection string for the separate-layer sand control well according to claim 3, wherein sealing systems are arranged between the inner connecting rod and the middle connecting sleeve, between the piston and the upper joint and between the inner connecting rod and the middle connecting sleeve and between the piston and the upper joint and between the inner connecting rod and the body part, and the sealing systems consist of copper rings, polytetrafluoroethylene and rubber rings;
preferably, the diameter of the rubber ring is 5.3mm, and a fit clearance of 1.5-2mm is reserved in the axial direction of the sealing part of the sealing system;
preferably, the copper ring is made of red copper; the polytetrafluoroethylene is graphite-doped polytetrafluoroethylene.
7. The layered polymer injection pipe column for the layered sand control well as defined in claim 3, wherein the threads at the joints of the lower joint and the lower connecting sleeve, the middle connecting sleeve and the lower connecting sleeve, the upper connecting sleeve and the middle connecting sleeve, the outer sleeve and the upper connecting sleeve, and the upper joint and the outer sleeve are made of low-profile acme female trapezoidal threads.
Preferably, a hydraulic control joint is arranged on the upper joint; the polymer injection outer holes and other injection channels are processed by rounding arcs, so that the shearing degree of the polymer is reduced.
8. The separate-layer polymer injection pipe column for the separate-layer sand control well according to claim 3, wherein a reserved pipeline channel, a conical plug hole, a balance channel, a pressurizing joint, a pressurizing channel, a pressure relief channel hole, a pressure relief + reserved pipeline channel are arranged on the body, all the joints and the channels are arranged in parallel, a proper conical sealing plug is arranged at the conical plug hole, and a proper hydraulic control pipeline joint is arranged at the pressurizing joint.
9. The method for using the separate-layer polymer injection pipe column of the separate-layer sand control well as defined in any one of claims 1 to 8, wherein the sand control pipe column on the outer wall and the separate-layer polymer injection pipe column on the inner wall are sequentially lowered, and a plurality of separate-layer polymer injection pipe columns are connected in series according to the polymer injection level; when each stage of the electro-hydraulic integrated polymer distributor is connected, the hydraulic control pipeline tee joint and the armored cable tee joint are respectively connected to a pressing joint and a cable joint of the electro-hydraulic integrated polymer distributor, the hydraulic control pipeline and the armored cable of the main channel all go through the reserved pipeline 1 channel and the pressure relief + reserved pipeline channel, then the pressing joint and the hydraulic control joint are connected through the hydraulic control pipeline, whether the conical plug hole is matched with the corresponding plug or not is checked on site, the hydraulic control pipeline and the armored cable are protected on the outer wall of the oil pipe through the corresponding protector, and finally the hydraulic control pipeline and the armored cable are connected to a ground control center.
10. The use method of claim 9, wherein during daily injection, the ground control center sends commands and supplies power to the motor to drive the mandrel to move, when the electrohydraulic integrated polymer distributor of the control layer needs to be pressed, the mandrel is pushed to a determined pressing position, the pressing joint is kept smooth, then according to the injection amount, the hydraulic control pipeline is used for pressurizing control, when a certain pressure is reached, the upper spring and the lower spring are compressed, the pressure is continuously increased, the track is sleeved on the track fixing sleeve to move, so that the sliding sleeve is driven to move up and down, because the slide sleeve is provided with a plurality of injection holes with different sizes, the flow control is realized, when the required flow is adjusted, then the motor is controlled to push the mandrel to a determined pressure stabilizing position, so that the pressure condition of the electro-hydraulic integrated distributor of the layer cannot be influenced by the pressing and pressure relief of other layers; if the electro-hydraulic integrated polymer distributor on the layer needs to be closed, the motor is controlled, the mandrel is pushed to the determined pressure relief position, and the hydraulic control pressure can be quickly released and closed;
preferably, when the hydraulic control pressure change track is adjusted, the pressure sensor is used for testing the pressure, the change can be successful only when the required pressure is achieved, and the failure probability of the change track is reduced.
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