A dual-control intelligent water injection tool suitable for offshore oil fields

Abstract

This invention discloses a dual-control intelligent water injection tool suitable for offshore oil fields. It includes: an upper connector, a straightening outer cylinder, a main body, a lower connecting cylinder, a lower connector, a central adjusting cylinder, a first pre-tightening spring, a second pre-tightening spring, an adjusting seat, a nozzle seat, and a motor. The beneficial effect of this invention is that it achieves dual control by controlling the opening and closing degree of the water outlet through the nozzle seat and bushing.

Description

Technical Field

[0001] This invention relates to the field of oilfield stratified water injection technology, and in particular to a dual-control intelligent measurement and adjustment water injection tool suitable for offshore oilfields. Background Technology

[0002] Over the past 20 years, the stratified water injection technology in offshore oilfields has gradually developed into four main water injection technologies: hollow inheritance, simultaneous measurement and adjustment, pre-installed cable, and cableless water injection. These technologies enable precise stratification, efficient measurement and adjustment, accurate injection allocation, and intelligent management of water injection wells in the Bohai Oilfield, meeting the needs of enhanced water drive, tapping potential oil layers, and increasing oilfield production. However, each technology employs a single measurement and control method.

[0003] However, with the widespread application of the technology in the field, the limitations of a single measurement and control method in the Bohai Oilfield's water injection process have become increasingly apparent. The downhole operating environment of water injection wells is complex, and measurement and control tools are placed downhole for extended periods. Especially under ultra-high temperature and pressure conditions, these tools are susceptible to the complex downhole environment, leading to measurement and control function failures and reduced stability. This results in a short lifespan for the process tubing, necessitating tubing removal and tool replacement, impacting normal production and incurring additional operating costs. Therefore, to improve the reliability of the process, tools, and tubing, and to ensure the continuous high and stable production of the oilfield, this research addresses the shortcomings of existing intelligent injection processes, such as the reliance on a single measurement and control method and the limitation that tool failures can only be addressed by moving the tubing to restore the process tubing's measurement and control function. This research aims to develop a dual-control intelligent measurement and control water injection tool suitable for offshore oilfields, supplementing the deficiencies in water injection measurement and control methods and providing strong technical support for oilfield development. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-control intelligent water injection tool suitable for offshore oil fields, which controls the opening and closing of the water outlet through a water nozzle seat and a bushing to achieve dual control.

[0005] To achieve the above objectives, the present invention adopts the following technical solution, including:

[0006] The upper connector has a cylindrical structure, and an inwardly extending positioning step is provided on the inner circumference of the middle part of the upper connector. The positioning step is used to cooperate with the positioning arm in the middle of the measuring and adjusting instrument. A first circumferential step and a second circumferential step are respectively provided on the inner and outer circumferences of the lower part of the upper connector. A pair of first crescent holes with axial penetration are evenly distributed on the positioning step.

[0007] The outer cylinder is straightened, and its upper end is connected to the upper connector. A first ring extending inward is provided on the inner circumference of the middle part of the outer cylinder. A pair of second crescent holes that pass through the axis are evenly distributed on the first ring. The second crescent holes are directly opposite the first crescent holes.

[0008] The main body is connected to the outer cylinder at its upper end. A third circumferential step extending inward is provided on the inner circumference of the lower part of the main body. An axial first through hole is provided on the third circumferential step, and a radially outward water outlet is provided in the middle of the first through hole.

[0009] The lower connecting cylinder is connected to the main body at its upper end. A fourth circumferential step is provided on the lower inner circumference of the lower connecting cylinder. An axially penetrating second through hole is provided on the fourth circumferential step. The second through hole is located directly below the second through hole.

[0010] The lower connector has its upper end connected to the lower connecting cylinder, and the lower connector has an axial countersunk hole located directly below the second through hole;

[0011] A central adjusting cylinder has an outer circumference that is adapted to the positioning step, the first ring, the third circumferential step, the fourth circumferential step, and the inner circumference of the lower connector. A second ring extending outwards is provided in the upper part of the central adjusting cylinder. A pair of third crescent-shaped holes are evenly distributed on the second ring. The upper and lower end faces of the second ring are smooth planes, and the upper end face of the second ring abuts against the lower end of the upper connector. The lower end face of the second ring abuts against the upper end of the first ring. A pair of adjusting grooves are provided in the upper part of the central adjusting cylinder, which are used to cooperate with the elastic arm at the lower part of the measuring and adjusting instrument. A pair of flow grooves are provided in the lower part of the central adjusting cylinder. A first gear structure is provided on the outer circumference of the lower end of the central adjusting cylinder. The central adjusting cylinder is used to rotate under the drive of the measuring and adjusting instrument.

[0012] The first preload spring and the second preload spring are respectively disposed within the first circumferential step and the second circumferential step. The upper ends of the first preload spring and the second preload spring abut against the upper connector; the lower ends of the first preload spring and the second preload spring abut against the second ring.

[0013] An adjusting seat is rotatably disposed on the upper part of the second through hole. A second gear structure is provided on the outer periphery of the adjusting seat, and the second gear structure meshes with the first gear structure. A first inner hole is provided at the center of the adjusting seat, and an internal thread is provided on the inner periphery of the first inner hole. The adjusting seat is used to rotate under the drive of the central adjusting cylinder.

[0014] A water nozzle seat is at least partially disposed within the first inner hole of the adjusting seat. The lower part of the water nozzle seat has an outwardly extending second periphery, and the second periphery has an external thread adapted to the internal thread. A flow hole is radially provided on the side wall of the water nozzle seat. The water nozzle seat is used to axially lift and lower under the action of the adjusting seat, thereby controlling the opening and closing degree of the water outlet.

[0015] A motor is installed at the lower part of the second through hole; a control module is provided at the lower end of the motor; the output shaft of the motor is connected to a transmission rod, the transmission rod is inserted into the water nozzle seat, and a bushing is provided at the upper end of the transmission rod. The motor is used to drive the bushing to rise and fall, thereby controlling the opening and closing degree of the water outlet.

[0016] The third crescent-shaped hole at least partially overlaps with the first and second crescent-shaped holes; the lower inner circumference of the straightening outer cylinder forms a cavity with the lower end face of the first ring, the upper outer circumference of the central adjusting cylinder, and the upper inner circumference of the main body; the first, second, and third crescent-shaped holes are connected to the upper part of the cavity; the adjusting groove and the flow groove are connected to the side of the cavity; and the first through hole is connected to the lower part of the cavity.

[0017] Preferably, it also includes:

[0018] A retaining ring is threaded onto the upper part of the first through hole;

[0019] An orifice plate flow meter is installed above the first through hole and above the fixing ring, and is used to detect pressure and flow rate through the outlet.

[0020] Preferably, the upper connector and the lower connector are respectively provided with a first through hole and a second through hole for axial wire passage.

[0021] Preferably, a pair of anti-rotation blocks are provided on the outer periphery of the middle part of the water nozzle seat; and a limiting groove adapted to the anti-rotation blocks is provided on the inner periphery of the upper part of the adjusting seat.

[0022] Preferably, a ceramic sleeve for providing wear resistance is provided on the upper inner circumference of the faucet seat.

[0023] Preferably, a third ring extending outward is provided on the outer periphery of the central adjusting cylinder, and the lower end face of the third ring abuts against the upper end of the third circumferential step.

[0024] Preferably, the upper connector, the straightening outer cylinder, the main body, the lower connecting cylinder, and the lower connector are connected by a pull ring structure and sealed by an O-ring.

[0025] The beneficial effect of the present invention is that the opening and closing degree of the water outlet is controlled by the water nozzle seat and the bushing, thereby achieving dual control. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a dual-control intelligent water injection tool suitable for offshore oil fields according to the present invention (water outlet closed).

[0027] Figure 2This is a schematic diagram of a dual-control intelligent water injection tool applicable to offshore oil fields according to the present invention (the opening of the water outlet is controlled by a bushing).

[0028] Figure 3 This is a schematic diagram of a dual-control intelligent water injection tool applicable to offshore oil fields according to the present invention (the water outlet opening is controlled by the water nozzle seat).

[0029] Figure 4 This is a schematic diagram of the central adjusting cylinder in this invention.

[0030] Figure 5 This is a schematic diagram of the water tap seat in this invention.

[0031] Figure 6 This is a schematic diagram of the motor in this invention.

[0032] Figure 7 for Figure 3 AA sectional view.

[0033] Figure 8 This is a schematic diagram of the measuring and adjusting instrument. Detailed Implementation

[0034] The invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0035] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0036] like Figure 1-8 As shown, the present invention provides a dual-control intelligent water injection tool 1 suitable for offshore oil fields, comprising:

[0037] The upper connector 110 has a cylindrical structure. An inwardly extending positioning step 111 is provided on the inner circumference of the middle part of the upper connector 110. The positioning step 111 is used to cooperate with the positioning arm 210 in the middle of the measuring and adjusting instrument 2. A first circumferential step 112 and a second circumferential step 113 are respectively provided on the inner and outer circumferences of the lower part of the upper connector 110. A pair of axially penetrating first crescent holes 114 are evenly distributed on the positioning step.

[0038] The outer cylinder 120 is straightened, and its upper end is connected to the upper connector 110. A first ring 121 extending inward is provided on the inner circumference of the middle part of the outer cylinder 120. A pair of second crescent holes 122 that are axially connected are evenly distributed on the first ring 121. The second crescent holes 122 are directly opposite the first crescent holes 114.

[0039] The main body 130 is connected to the upper end of the straightening outer cylinder 120. A third circumferential step 131 extending inward is provided on the lower inner circumference of the main body 130. An axial first through hole 132 is provided on the third circumferential step 131, and a radially outward water outlet 133 is provided in the middle of the first through hole 132.

[0040] The lower connecting cylinder 140 is connected to the main body 130 at its upper end. A fourth circumferential step 141 is provided on the lower inner circumference of the lower connecting cylinder 140. A second through hole 142 is provided on the fourth circumferential step, and the second through hole 142 is located directly below the second through hole 142.

[0041] The lower connector 150 is connected at its upper end to the lower connecting cylinder 140. An axial countersunk hole 151 is provided on the lower connector 150, and the countersunk hole is located directly below the second through hole 142.

[0042] The outer periphery of the central adjusting cylinder 160 is adapted to the positioning step 111, the first ring 121, the third circumferential step 131, the fourth circumferential step 141, and the inner periphery of the lower connector 150. A second ring 161 extending outwards is provided in the upper part of the central adjusting cylinder 160. A pair of third crescent-shaped holes 162 are evenly distributed on the second ring 161. The upper and lower end faces of the second ring 161 are smooth planes, and the upper end face of the second ring 161 is aligned with the upper connector 111. The lower ends of the two rings 161 and 121 are abutted together; the lower end face of the second ring 161 abuts together with the upper end of the first ring 121; a pair of adjustment grooves 163 are provided in the upper part of the central adjustment cylinder 160, and the adjustment grooves 163 are used to cooperate with the elastic arm 220 at the lower part of the measuring instrument 2; a pair of flow grooves 164 are provided in the lower part of the central adjustment cylinder 160; a first gear tooth structure 165 is provided on the outer periphery of the lower end of the central adjustment cylinder 160; the central adjustment cylinder 160 is used to rotate under the drive of the measuring instrument 2.

[0043] The first preload spring 115 and the second preload spring 116 are respectively disposed in the first circumferential step 112 and the second circumferential step 113. The upper ends of the first preload spring 115 and the second preload spring 116 abut against the upper connector 110; the lower ends of the first preload spring 115 and the second preload spring 116 abut against the second ring 161.

[0044] An adjusting seat 171 is rotatably disposed on the upper part of the second through hole 142. A second gear structure 171a is provided on the outer periphery of the adjusting seat 171, and the second gear structure 171a meshes with the first gear structure 165. A first inner hole is provided at the center of the adjusting seat 171, and an internal thread is provided on the inner periphery of the first inner hole. The adjusting seat 171 is used to rotate under the drive of the central adjusting cylinder 160.

[0045] A water nozzle seat 172 is at least partially disposed within the first inner hole of the adjusting seat 171. The lower part of the water nozzle seat 172 is provided with an outwardly extending second periphery 172a, and the second periphery 172a is provided with an external thread adapted to the internal thread. A flow hole 172b is provided radially on the side wall of the water nozzle seat 172. The water nozzle seat 172 is used to axially lift and lower under the action of the adjusting seat 171, thereby controlling the opening and closing degree of the water outlet 133.

[0046] A motor 181 is disposed below the second through hole 142; a control module 182 is provided at the lower end of the motor 181; the output shaft of the motor 181 is connected to a transmission rod 183, the transmission rod 183 is inserted into the water nozzle seat, and a bushing 184 is provided at the upper end of the transmission rod 183. The motor is used to drive the bushing 184 to rise and fall, thereby controlling the opening and closing degree of the water outlet 133.

[0047] The third crescent-shaped hole 162 at least partially overlaps with the first crescent-shaped hole 114 and the second crescent-shaped hole 122; the lower inner circumference of the straightening outer cylinder 120 forms a cavity 123 with the lower end face of the first ring 121, the upper outer circumference of the central adjusting cylinder 160 and the upper inner circumference of the main body 130; the first crescent-shaped hole 114, the second crescent-shaped hole 122 and the third crescent-shaped hole 162 are connected to the upper part of the cavity 123; the adjusting groove 163 and the flow groove 164 are connected to the side of the cavity 123; the first through hole 132 is connected to the lower part of the cavity 123.

[0048] When it is necessary to adjust the opening degree of the outlet 133, an electrical signal can be sent to the control module 182. The control module 182 controls the motor 181, which drives the bushing 184 to rise and fall through the transmission rod 183, thereby controlling the opening degree of the outlet 133. Alternatively, the measuring and adjusting instrument 2 can be lowered into the well. The positioning arm 210 of the measuring and adjusting instrument 2 cooperates with the positioning step 111, and the elastic arm 220 of the measuring and adjusting instrument 2 cooperates with the adjusting groove 163. Then, the controller 240 on the measuring and adjusting instrument 2 controls the motor 230 to output rotational power, which drives the central adjusting cylinder 160 to rotate through the elastic arm 220. The central adjusting cylinder 160 drives the second gear structure 171a through the first gear structure 165, thereby driving the adjusting seat 171 to rotate. The water nozzle seat 172 rises and falls axially under the transmission of the adjusting seat 171, and the opening degree of the outlet 133 is adjusted by changing the overlap between the flow hole 172b and the outlet 133.

[0049] In another embodiment, it also includes:

[0050] A retaining ring 191 is threaded onto the upper part of the first through hole 132;

[0051] An orifice plate flow meter 192 is disposed on the upper part of the first through hole 132 and above the fixing ring 191, and is used to detect pressure and flow rate through the outlet.

[0052] In another embodiment, the upper connector 110 and the lower connector 150 are respectively provided with an axial first wire through hole 117 and a second wire through hole 152.

[0053] In another embodiment, a pair of anti-rotation blocks 172c are provided on the outer periphery of the middle part of the water nozzle seat 172; a limiting groove adapted to the anti-rotation blocks 172c is provided on the inner periphery of the upper part of the adjusting seat 171.

[0054] In another embodiment, a ceramic sleeve 172d for providing wear resistance is provided on the upper inner periphery of the faucet seat 172.

[0055] In another embodiment, a third ring 166 extending outward is provided on the outer periphery of the central adjusting cylinder 160, and the lower end face of the third ring 166 abuts against the upper end of the third circumferential step 131.

[0056] In another embodiment, the upper connector 110, the straightening outer cylinder 120, the main body 130, the lower connecting cylinder 140, and the lower connector 150 are connected by a pull ring structure and sealed by an O-ring.

[0057] In summary, the present invention provides a dual-control intelligent water injection tool 1 suitable for offshore oil fields, which controls the opening and closing degree of the water outlet 133 through the water nozzle seat 172 and the bushing 184 to achieve dual control.

[0058] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A dual-control intelligent water injection tool suitable for offshore oil fields, characterized in that, include: The upper connector has a cylindrical structure, and an inwardly extending positioning step is provided on the inner circumference of the middle part of the upper connector. The positioning step is used to cooperate with the positioning arm in the middle of the measuring and adjusting instrument. A first circumferential step and a second circumferential step are respectively provided on the inner and outer circumferences of the lower part of the upper connector. A pair of first crescent holes with axial penetration are evenly distributed on the positioning step. The outer cylinder is straightened, and its upper end is connected to the upper connector. A first ring extending inward is provided on the inner circumference of the middle part of the outer cylinder. A pair of second crescent holes that pass through the axis are evenly distributed on the first ring. The second crescent holes are directly opposite the first crescent holes. The main body is connected to the outer cylinder at its upper end. A third circumferential step extending inward is provided on the inner circumference of the lower part of the main body. An axial first through hole is provided on the third circumferential step, and a radially outward water outlet is provided in the middle of the first through hole. The lower connecting cylinder is connected to the main body at its upper end. A fourth circumferential step is provided on the lower inner circumference of the lower connecting cylinder. A second through hole is provided on the fourth circumferential step, and the second through hole is located directly below the first through hole. The lower connector has its upper end connected to the lower connecting cylinder, and the lower connector has an axial countersunk hole located directly below the second through hole; A central adjusting cylinder has an outer circumference that is adapted to the positioning step, the first ring, the third circumferential step, the fourth circumferential step, and the inner circumference of the lower connector. A second ring extending outwards is provided in the upper part of the central adjusting cylinder. A pair of third crescent-shaped holes are evenly distributed on the second ring. The upper and lower end faces of the second ring are smooth planes, and the upper end face of the second ring abuts against the lower end of the upper connector. The lower end face of the second ring abuts against the upper end of the first ring. A pair of adjusting grooves are provided in the upper part of the central adjusting cylinder, which are used to cooperate with the elastic arm at the lower part of the measuring and adjusting instrument. A pair of flow grooves are provided in the lower part of the central adjusting cylinder. A first gear structure is provided on the outer circumference of the lower end of the central adjusting cylinder. The central adjusting cylinder is used to rotate under the drive of the measuring and adjusting instrument. The first preload spring and the second preload spring are respectively disposed within the first circumferential step and the second circumferential step. The upper ends of the first preload spring and the second preload spring abut against the upper connector; the lower ends of the first preload spring and the second preload spring abut against the second ring. An adjusting seat is rotatably disposed on the upper part of the second through hole. A second gear structure is provided on the outer periphery of the adjusting seat, and the second gear structure meshes with the first gear structure. A first inner hole is provided at the center of the adjusting seat, and an internal thread is provided on the inner periphery of the first inner hole. The adjusting seat is used to rotate under the drive of the central adjusting cylinder. A water nozzle seat is at least partially disposed within the first inner hole of the adjusting seat. The lower part of the water nozzle seat has an outwardly extending second periphery, and the second periphery has an external thread adapted to the internal thread. A flow hole is radially provided on the side wall of the water nozzle seat. The water nozzle seat is used to axially lift and lower under the action of the adjusting seat, thereby controlling the opening and closing degree of the water outlet. A motor is installed at the lower part of the second through hole; a control module is provided at the lower end of the motor; the output shaft of the motor is connected to a transmission rod, the transmission rod is inserted into the water nozzle seat, and a bushing is provided at the upper end of the transmission rod. The motor is used to drive the bushing to rise and fall, thereby controlling the opening and closing degree of the water outlet. The third crescent-shaped hole at least partially overlaps with the first and second crescent-shaped holes; the lower inner circumference of the straightening outer cylinder forms a cavity with the lower end face of the first ring, the upper outer circumference of the central adjusting cylinder, and the upper inner circumference of the main body; the first, second, and third crescent-shaped holes are connected to the upper part of the cavity; the adjusting groove and the flow groove are connected to the side of the cavity; and the first through hole is connected to the lower part of the cavity.

2. The dual-control intelligent water injection tool for offshore oil fields according to claim 1, characterized in that, Also includes: A retaining ring is threaded onto the upper part of the first through hole; An orifice plate flow meter is installed above the first through hole and above the fixing ring, and is used to detect pressure and flow rate through the outlet.

3. The dual-control intelligent water injection tool for offshore oil fields according to claim 1, characterized in that: The upper connector and the lower connector are respectively provided with a first through hole and a second through hole for axial wire passage.

4. The dual-control intelligent water injection tool for offshore oil fields according to claim 1, characterized in that: A pair of anti-rotation blocks are provided on the outer periphery of the middle part of the water nozzle seat; a limiting groove adapted to the anti-rotation blocks is provided on the inner periphery of the upper part of the adjusting seat.

5. The dual-control intelligent water injection tool for offshore oil fields according to claim 1, characterized in that: A ceramic sleeve for providing wear resistance is provided on the upper inner circumference of the water nozzle seat.

6. The dual-control intelligent water injection tool for offshore oil fields according to claim 1, characterized in that: A third ring extending outward is provided on the outer periphery of the central adjusting cylinder, and the lower end face of the third ring abuts against the upper end of the third circumferential step.

7. The dual-control intelligent water injection tool for offshore oil fields according to claim 1, characterized in that: The upper connector, the straightening outer cylinder, the main body, the lower connecting cylinder, and the lower connector are connected by a pull ring structure and sealed by an O-ring.

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