CN108019193B - Hollow measuring and adjusting integrated polymer injection device - Google Patents
Hollow measuring and adjusting integrated polymer injection device Download PDFInfo
- Publication number
- CN108019193B CN108019193B CN201610950174.3A CN201610950174A CN108019193B CN 108019193 B CN108019193 B CN 108019193B CN 201610950174 A CN201610950174 A CN 201610950174A CN 108019193 B CN108019193 B CN 108019193B
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- throttling
- working cylinder
- outer working
- adjusting
- central tube
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- 238000002347 injection Methods 0.000 title claims abstract description 45
- 239000007924 injection Substances 0.000 title claims abstract description 45
- 229920000642 polymer Polymers 0.000 title claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000007363 regulatory process Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- 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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a hollow measurement and adjustment integrated polymer injection device which comprises a throttling outer working cylinder, a lower central tube, an adjusting core, a flow guide tube and an anti-puncture piston, wherein the lower end of the throttling outer working cylinder is connected with the upper end of the lower central tube, the adjusting core is arranged inside the throttling outer working cylinder and forms an inner annular space between the throttling outer working cylinder and the lower central tube, the flow guide tube is arranged outside the throttling outer working cylinder and forms an outer annular space between the throttling outer working cylinder and the throttling outer working cylinder, the upper end of the adjusting core is provided with an upper liquid inlet communicated with the inner annular space, the lower end of the adjusting core is provided with a lower liquid inlet communicated with the inner annular space, the throttling outer working cylinder is provided with an overflow hole communicated with the inner annular space and the outer annular space simultaneously, the anti-puncture piston is sleeved outside the lower central tube and forms a pressure cavity between the throttling outer working cylinder and the lower central tube is provided with a radial hole communicated with the pressure cavity. The invention realizes the stress balance of the regulating mechanism under large throttle pressure difference, and can effectively avoid the problems of large regulating torque and even incapability of regulating caused by the change of the throttle pressure difference in the switching regulating process.
Description
Technical Field
The invention relates to a polymer injection technology in tertiary oil recovery production of an oil field, in particular to a hollow measuring and adjusting integrated polymer injector.
Background
The layering injection polymerization technology adopted by the current oil field mainly comprises two types: one is an eccentric structure layered injection polymerization technology, the other is a hollow structure layered injection polymerization technology, both of which adopt a casting-in type structure, and injection quantity is adjusted by casting-in and casting-in type core-gathering for many times. In the application process, the casting-in-fishing type compounding and polymerization technology has the following defects:
1) And (5) testing and adjusting the time consumption. The wellhead pressure point and pressure stabilization are required to be excessively long in layering test, and generally take 2-3 days; and repeatedly casting, fishing and testing until the injection quantity of each layer is qualified, taking three-layer injection as an example, and generally taking 7-8 days for testing and adjusting the time consumption.
2) The casting and fishing adjustment workload is large and the accuracy is poor. After the test is finished, according to the existing flow and throttling pressure difference curve plate, a matching core with corresponding length is put into a matching device working cylinder corresponding to an injection layer, because the viscosity of injected polymers of different areas on site is inconsistent or the viscosity change before and after the injection process is large, the actual injection and adjustment capability cannot be effectively reflected by adopting standard measurement and adjustment plate comparison, the adjustment accuracy is poor, meanwhile, multiple tests and re-adjustment are needed, for a multi-stage injection well, each level matching core needs to be repeatedly put and fished during the test and adjustment, the field work load is large, and the adjustment needs to be retested when the injection quantity or the injection viscosity of an interval is adjusted in the later stage.
3) The throttle control mechanism is easy to be blocked.
The hollow and eccentric polymer injection technology realizes polymer flow regulation by throttling through an annular fixed gap throttling unit, is influenced by the water quality of injected polymer, is extremely easy to cause scaling and blocking of an annular throttling channel of a polymer matching device, can only be used for fishing out a polymer matching core to be allocated again after blocking, and has the defects of large later allocation fishing force and easy blockage caused by corrosion and scaling, thereby influencing the service life of a pipe column.
Disclosure of Invention
The invention aims to provide a hollow measurement and adjustment integrated polymer injection device, which realizes the stress balance of an adjusting mechanism under large throttling pressure difference and can effectively avoid the problems of large adjusting torque and even incapability of adjusting caused by the change of throttling pressure difference in the switching adjustment process.
In order to achieve the purpose, the hollow measuring and regulating integrated polymer injection device comprises a throttling outer working cylinder, a lower central tube, a regulating core, a flow guide tube and an anti-puncture piston, wherein the lower end of the throttling outer working cylinder is connected with the upper end of the lower central tube, the regulating core is arranged inside the throttling outer working cylinder and forms an inner annular space between the throttling outer working cylinder and the regulating core, the flow guide tube is arranged outside the throttling outer working cylinder and forms an outer annular space between the throttling outer working cylinder and forms an outer annular space, the upper end of the regulating core is provided with an upper liquid inlet hole communicated with the inner annular space, the lower end of the regulating core is provided with a lower liquid inlet hole communicated with the inner annular space, the throttling outer working cylinder is provided with a flow through hole simultaneously communicated with the inner annular space and the outer annular space, the anti-puncture piston is sleeved outside the lower central tube and forms a pressure cavity between the lower central tube is provided with a radial hole communicated with the pressure cavity, and the upper end of the anti-puncture piston is opened and closed at the lower port of the outer annular space.
The anti-puncture piston is characterized in that the lower end of the anti-puncture piston is connected with a resetting device, the resetting device comprises an anti-puncture spring and an adjusting ring, the anti-puncture spring and the adjusting ring are sleeved on the lower central tube, the upper end of the anti-puncture spring props against the lower end face of the anti-puncture piston, and the lower end of the anti-puncture spring props against the adjusting ring.
The lower end of the lower central tube is connected with a lower joint, and an adjusting ring is arranged above the upper end face of the lower joint.
The outer wall of the upper end of the throttling outer working cylinder is connected with the injection sleeve through an outer pipe, an adjusting pull rod is arranged in the injection sleeve, a bearing is arranged in the outer pipe, an upper bearing pressing ring and a lower bearing pressing ring are respectively arranged at the upper end and the lower end of the bearing, and the lower end of the adjusting pull rod is connected with an adjusting core through a bearing.
And a thrust spring is arranged between the lower bearing compression ring and the upper end surface of the throttling outer working cylinder.
The regulating core adopts a cylinder structure, the outer wall is provided with non-spiral equidistant positive spindle-shaped throttling grooves, the inner wall of the throttling outer working cylinder is provided with the same non-spiral equidistant positive spindle-shaped throttling grooves, and the non-spiral equidistant positive spindle-shaped throttling grooves and the throttling outer working cylinder are symmetrically matched.
The upper end of the polymer injection sleeve is connected with a positioning pipe, the upper end of the positioning pipe is connected with an upper joint, and the inner wall of the positioning pipe is provided with a clamping table for axially positioning the adjusting pull rod.
Compared with the prior art, the invention has the following beneficial effects:
the matched rotating bearing mechanism is formed, the cylindrical hollow same-size adjustable matching mechanism with liquid inlet at two ends and liquid outlet at the middle part is used, so that the stress balance of the adjusting mechanism under large throttle pressure difference is realized, and the problems that the adjusting torque is large and even the adjusting torque cannot be adjusted due to the change of the throttle pressure difference in the switch adjusting process can be effectively avoided.
The method realizes the measurement and adjustment of each injection layer, can complete the measurement and adjustment of all layers after one trip, and has small measurement and adjustment workload and high efficiency.
The hollow equal-inner-diameter measuring and adjusting integrated structure is adopted, and the layering level is not limited;
the matching core and the working cylinder are matched in a cylindrical mode with equal diameters, annular groove throttling units are symmetrically distributed, the axial adjusting distance is small, and the adjusting efficiency is higher; and the ground direct reading of the test data is realized, stepless allocation is realized, and the allocation precision is high.
Drawings
FIG. 1 is a schematic diagram of a hollow measuring and adjusting integrated polymer injection device.
In the figure: 1-upper joint; 2-positioning pipes; 3-adjusting the pull rod; 4, injecting a polymer sleeve; 5-a seal; 6-a bearing compression ring; 7-a bearing assembly; 8-an outer tube; 9-a thrust spring; 10-adjusting the core; 11-a throttle outer working cylinder; 12-a flow guiding pipe; 13-lower central tube; 14-an anti-stab piston; 15-an anti-stab spring; 16-an adjusting ring; 17-lower joint.
Description of the embodiments
The detailed description and technical content of the present invention are described below with reference to the accompanying drawings, which are provided for reference and description only, and are not intended to limit the present invention.
According to fig. 1, the hollow survey and adjustment integrated polymer injection device comprises a throttling outer working cylinder 11, a lower central tube 13, an adjusting core 10, a flow guide tube 12 and an anti-puncture piston 14, wherein the lower end of the throttling outer working cylinder is connected with the upper end of the lower central tube, the adjusting core is arranged inside the throttling outer working cylinder and forms an inner annular space between the throttling outer working cylinder and the lower central tube, the flow guide tube is arranged outside the throttling outer working cylinder and forms an outer annular space between the throttling outer working cylinder and forms an outer annular space, the upper end of the adjusting core is provided with an upper liquid inlet hole communicated with the inner annular space, the lower end of the adjusting core is provided with a lower liquid inlet hole communicated with the inner annular space, the throttling outer working cylinder is provided with an overflow hole simultaneously communicated with the inner annular space and the outer annular space, the anti-puncture piston is sleeved outside the lower central tube and forms a pressure cavity between the lower central tube and is provided with a radial hole communicated with the pressure cavity, and the lower port of the outer annular space of the anti-puncture piston is opened and closed. The regulating core adopts a cylinder structure, the outer wall is provided with non-spiral equidistant positive spindle-shaped throttling grooves, the inner wall of the throttling outer working cylinder is provided with the same non-spiral equidistant positive spindle-shaped throttling grooves, and the non-spiral equidistant positive spindle-shaped throttling grooves and the throttling outer working cylinder are symmetrically matched.
The anti-prick piston lower extreme connection resetting means, resetting means is including preventing thorn spring 15, adjusting ring 16, prevent thorn spring and adjusting ring all cover on lower center tube, prevent thorn spring upper end jack-up and prevent thorn piston lower terminal surface, the lower extreme jack-up is on the adjusting ring. The lower end of the lower central tube is connected with a lower joint 17, and an adjusting ring is arranged above the upper end face of the lower joint.
The outer wall of the upper end of the throttling outer working cylinder is connected with an injection sleeve 4 through an outer pipe 8, an adjusting pull rod 3 is arranged in the injection sleeve, a bearing is arranged in the outer pipe, an upper bearing press ring and a lower bearing press ring are respectively arranged at the upper end and the lower end of the bearing, and the lower end of the adjusting pull rod is connected with an adjusting core through a bearing. And a thrust spring 9 is arranged between the lower bearing compression ring and the upper end surface of the throttling outer working cylinder. The upper end of the polymer injection sleeve is connected with a positioning pipe 2, the upper end of the positioning pipe is connected with an upper joint 1, and the inner wall of the positioning pipe is provided with a clamping table for axially positioning the adjusting pull rod.
The upper joint 1 is connected with the positioning tube 2, the positioning tube 2 is connected with the polymer injection sleeve 4, the polymer injection sleeve 4 is connected with the outer tube 8, the adjusting pull rod 3 is arranged in the polymer injection sleeve 4 and is connected with the polymer injection sleeve 4 through adjusting threads, the lower part of the adjusting pull rod 3 is connected with the bearing assembly 7, the bearing assembly 7 is provided with the bearing compression ring 6 up and down, the lower part of the bearing assembly 7 is connected with the adjusting core 10 and is integrally arranged above the thrust spring 9, the outer tube 8 is connected with the throttling outer working tube 11, the thrust spring 9 is arranged above the throttling outer working tube 11, the adjusting core 10 is arranged inside the throttling outer working tube 11, the throttling outer working tube 11 is sleeved with the honeycomb duct 12, the throttling outer working tube 11 is connected with the outer part of the lower central tube 13, the lower part of the adjusting core 10 is inserted into the lower central tube 13, the lower central tube 13 is sleeved with the anti-stabbing piston 14, the anti-stabbing spring 15 and the adjusting ring 16 from top to bottom, and the lower part of the lower central tube 13 is connected with the lower joint.
The working process comprises the following steps: 1. and (5) connection. The tool was run into the injection well through a 27/8TBG tubing connection.
2. And (5) starting injection polymerization. When the oil pipe is filled with polymer, the radial hole of the lower central pipe enters the space between the lower central pipe and the piston, the liquid pressure pushes the stab-resistant piston to move downwards and form a gap with the lower end part of the guide pipe, and meanwhile, the polymer flows out from the overflow hole in the middle part of the throttling outer working cylinder after entering the space between the core and the throttling outer working cylinder from the upper liquid inlet holes and the lower liquid inlet holes at the upper end and the lower end of the injection adjusting core and flows out from the gap outlet formed by the guide pipe end and the stab-resistant piston after passing through the annular channel of the guide pipe and the throttling outer working cylinder, so that the polymer is filled into stratum.
3. And (5) measuring and adjusting. When the injection quantity of each layer needs to be adjusted, the measuring and adjusting instrument is inserted into the ground, the positioning mechanism of the measuring and adjusting instrument is positioned at the top limit position in the positioning tube, and the lower end adjusting manipulator of the instrument is matched with the opening of the adjusting pull rod, so that positioning and butt joint are completed. The ground gives an adjusting instruction, the instrument rotating mechanism drives the adjusting core pull rod and the bearing to rotate, the rotating motion is converted into axial up-and-down movement through the adjusting screw threads, the axial displacement adjustment is carried out on the corresponding throttling units symmetrically distributed between the adjusting core and the throttling outer working cylinder, the periodic change of the size of the flow passage is realized, meanwhile, the instrument top is matched with the instrument to be installed, the underground allocation result can be transmitted in real time, and accurate comparison is carried out until the allocation requirement is met.
The hollow measurement and adjustment integrated polymer injection device integrates a cylindrical hollow polymer distribution core with equal size, a rotatable and adjustable bearing mechanism, a positioning mechanism and the like into a polymer distribution device working barrel, the inner diameter size of the polymer distribution core of each layer section is consistent, a measurement and adjustment instrument is arranged under a ground wellhead, the rotational polymer distribution core adjusting mechanism converts rotational motion into micro-movement of the polymer distribution core up and down along the axial direction through the bearing mechanism, the relative position of a matched throttling unit between the polymer distribution device working barrel and the polymer distribution core is changed, the size change of a throttling channel is realized, the injection quantity through the polymer injection device can be effectively changed, and meanwhile, the blockage of the polymer injection channel can be effectively prevented; even after blockage, the injection quantity can be recovered by adjusting the gap, and the blockage can be scoured and cleaned. The structure is matched with the core and the working cylinder in a cylindrical mode with equal diameters, the surfaces of the core and the working cylinder are provided with corresponding annular groove throttling units, two ends are adopted for liquid feeding, and the middle part is used for liquid discharging, so that the stress balance of the regulating mechanism under large throttling pressure difference is realized, the switching regulating process can be effectively avoided, and the problem that the regulating torque is large and even the regulating torque cannot be regulated due to overlarge throttling pressure difference is solved.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the invention, but rather to limit the scope of the invention to the equivalents of the claims to which the invention pertains.
Claims (1)
1. The hollow measurement and adjustment integrated polymer injection device is characterized by comprising a throttling outer working cylinder, a lower central tube, an adjusting core, a flow guide tube and an anti-puncture piston, wherein the lower end of the throttling outer working cylinder is connected with the upper end of the lower central tube, the adjusting core is arranged inside the throttling outer working cylinder and forms an inner annular space between the throttling outer working cylinder and the lower central tube, the flow guide tube is arranged outside the throttling outer working cylinder and forms an outer annular space between the throttling outer working cylinder and the throttling outer working cylinder, the upper end of the adjusting core is provided with an upper liquid inlet communicated with the inner annular space, the lower end of the adjusting core is provided with a lower liquid inlet communicated with the inner annular space, the throttling outer working cylinder is provided with an overflow hole communicated with the inner annular space and the outer annular space simultaneously, the anti-puncture piston is sleeved outside the lower central tube and forms a pressure cavity between the lower central tube, and the lower central tube is provided with a radial hole communicated with the pressure cavity;
the lower end of the anti-puncture piston is connected with a resetting device, the resetting device comprises an anti-puncture spring and an adjusting ring, the anti-puncture spring and the adjusting ring are sleeved on the lower central tube, the upper end of the anti-puncture spring props against the lower end face of the anti-puncture piston, and the lower end of the anti-puncture spring props against the adjusting ring; the lower end of the lower central tube is connected with a lower joint, and an adjusting ring is arranged above the upper end surface of the lower joint;
the outer wall of the upper end of the throttling outer working cylinder is connected with an injection sleeve through an outer pipe, an adjusting pull rod is arranged in the injection sleeve, a bearing is arranged in the outer pipe, an upper bearing press ring and a lower bearing press ring are respectively arranged at the upper end and the lower end of the bearing, and the lower end of the adjusting pull rod is connected with an adjusting core through a bearing; a thrust spring is arranged between the lower bearing compression ring and the upper end surface of the throttling outer working cylinder; the upper end of the polymer injection sleeve is connected with a positioning pipe, the upper end of the positioning pipe is connected with an upper joint, and the inner wall of the positioning pipe is provided with a clamping table for axially positioning the adjusting pull rod;
the regulating core adopts a cylinder structure, the outer wall is provided with non-spiral equidistant positive spindle-shaped throttling grooves, the inner wall of the throttling outer working cylinder is provided with the same non-spiral equidistant positive spindle-shaped throttling grooves, and the non-spiral equidistant positive spindle-shaped throttling grooves and the throttling outer working cylinder are symmetrically matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610950174.3A CN108019193B (en) | 2016-11-02 | 2016-11-02 | Hollow measuring and adjusting integrated polymer injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610950174.3A CN108019193B (en) | 2016-11-02 | 2016-11-02 | Hollow measuring and adjusting integrated polymer injection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108019193A CN108019193A (en) | 2018-05-11 |
| CN108019193B true CN108019193B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610950174.3A Active CN108019193B (en) | 2016-11-02 | 2016-11-02 | Hollow measuring and adjusting integrated polymer injection device |
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| Publication number | Publication date |
|---|---|
| CN108019193A (en) | 2018-05-11 |
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