Double-control intelligent measuring and adjusting water injection tool suitable for offshore oilfield

Abstract

The invention discloses a double-control intelligent measuring and adjusting water injection tool suitable for an offshore oilfield. Comprising an upper connector, a centralizing outer cylinder, a main body, a lower connecting cylinder, a lower connector, a center adjusting cylinder, a first pre-tightening spring, a second pre-tightening spring, an adjusting seat, a water nozzle seat and a motor. The water faucet has the beneficial effects that the opening degree of the water outlet is controlled through the water nozzle base and the shaft sleeve, and dual control is achieved.

Description

Technical Field

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

[0002] The offshore oilfield stratified water injection technology has experienced more than 20 years of development, and has gradually formed four main water injection technology technologies: hollow inheritance, measurement and adjustment, pre-set cable and cable-free water injection. It has achieved fine stratification, efficient measurement and adjustment, precise injection and intelligent management and control of Bohai Oilfield water injection wells, meeting the needs of oilfields to enhance water drive, tap potential oil layers and increase oilfield production, but all use a single measurement and control method.

[0003] However, with the promotion of on-site application of the technology, the water injection technology in Bohai Oilfield has gradually highlighted the shortcomings of a single measurement and control method. The downhole operation environment of the water injection well is complex, and the measurement and adjustment tools are placed underground for a long time. Especially in the ultra-high temperature and high pressure environment, they are easily affected by the complex downhole environment and have measurement and adjustment function failures and reduced stability, resulting in a short service life of the process string. It is necessary to lift the string and replace the downhole tools, which affects normal production and causes additional operating costs. Therefore, in order to improve the reliability of the process, tools and strings, and ensure the continuous high and stable production of the oilfield, in view of the problem that the existing intelligent injection process has a single measurement and control method and can only restore the process string measurement and control function by moving the string when the tool fails, a dual-control intelligent measurement and adjustment water injection tool suitable for offshore oilfields is studied to supplement the shortcomings of the water injection process in the water injection measurement and control methods and provide strong technical support for oilfield exploitation. Summary of the invention

[0004] The object of the present invention is to provide a dual-control intelligent measuring and adjusting water injection tool suitable for offshore oil fields, which controls the opening and closing degree of the water outlet through a water nozzle seat and a shaft sleeve to achieve dual control.

[0005] To achieve the above object, the present invention adopts the following technical solutions, including:

[0006] The upper joint is a cylindrical structure, and a positioning step extending inward is provided on the inner circumference of the middle part of the upper joint; the positioning step is used to cooperate with the positioning arm in the middle part of the measuring and adjusting instrument; a first circumferential step and a second circumferential step are respectively provided on the inner circumference and outer circumference of the lower part of the upper joint; a pair of first crescent holes penetrating axially are evenly distributed on the positioning step;

[0007] The upper end of the outer straightening cylinder is connected to the upper joint, and a first circular ring extending inward is provided on the inner circumference of the middle part of the outer straightening cylinder, and a pair of second crescent holes penetrating axially are evenly distributed on the first circular ring; the second crescent holes are directly opposite to the first crescent holes;

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

[0009] A lower connecting tube, the upper end of which is connected to the main body, a fourth circumferential step is provided on the inner circumference of the lower middle part of the lower connecting tube, a second through hole axially penetrating is provided on the fourth circumferential step, and the second through hole is located directly below the second through hole;

[0010] A lower joint, the upper end of which is connected to the lower connecting tube, and an axial countersunk hole is provided on the lower joint, and the countersunk hole is located directly below the second through hole;

[0011] A center adjustment cylinder, the outer circumference of which is adapted to the positioning step, the first circular ring, the third circular step, the fourth circular step and the inner circumference of the lower joint; a second circular ring extending outward is provided at the upper middle part of the center adjustment cylinder; a pair of third crescent holes are evenly distributed on the second circular ring; the upper end face and the lower end face of the second circular ring are respectively smooth planes, and the upper end face of the second circular ring abuts against the lower end of the upper joint; the lower end face of the second circular ring abuts against the upper end of the first circular ring; a pair of adjustment grooves are provided at the upper middle part of the center adjustment cylinder, and the adjustment grooves are used to cooperate with the elastic arms at the lower part of the measuring and adjusting instrument; a pair of flow grooves are provided at the lower middle part of the center adjustment cylinder; a first gear tooth structure is provided at the outer circumference of the lower end of the center adjustment cylinder; the center adjustment cylinder is used to rotate driven by the measuring and adjusting instrument;

[0012] A first preload spring and a second preload spring, which are respectively arranged in 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 joint; the lower ends of the first preload spring and the second preload spring abut against the second circular ring;

[0013] An adjustment seat is rotatably arranged on the upper part of the second through hole, a second gear tooth structure is arranged on the outer periphery of the adjustment seat, and the second gear tooth structure is meshed with the first gear tooth structure; a first inner hole is arranged at the center of the adjustment seat, and an internal thread is arranged on the inner periphery of the first inner hole; the adjustment seat is used to rotate under the drive of the central adjustment cylinder;

[0014] A faucet seat, which is at least partially arranged in the first inner hole of the adjustment seat, a second peripheral edge extending outward is arranged at the lower part of the faucet seat, and an external thread matching the internal thread is arranged on the second peripheral edge; a flow hole is radially arranged on the side wall of the faucet seat; the faucet seat is used to axially rise and fall under the drive of the adjustment seat, thereby controlling the opening and closing degree of the water outlet;

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

[0016] Among them, the third crescent hole at least partially overlaps with the first crescent hole and the second crescent hole; the inner circumference of the lower part of the straightening outer cylinder and the lower end surface of the first circular ring, the upper outer circumference of the center adjustment cylinder and the upper inner circumference of the main body form a cavity, the first crescent hole, the second crescent hole and the third crescent hole are connected to the upper part of the cavity, the adjustment groove and the flow groove are connected to the side of the cavity; the first through hole is connected to the lower part of the cavity.

[0017] Preferably, it also includes:

[0018] A fixing ring, which is threadedly arranged on the upper portion of the first through hole;

[0019] An orifice flow meter is arranged on the upper part of the first through hole and located above the fixing ring, and is used to detect the pressure and the flow through the water outlet.

[0020] Preferably, a first axial wire passing through hole and a second wire passing through hole are respectively provided on the upper joint and the lower joint.

[0021] Preferably, a pair of anti-rotation blocks are provided on the outer periphery of the middle part of the faucet seat; and limiting grooves matched with the anti-rotation blocks are provided on the inner periphery of the upper part of the adjustment seat.

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

[0023] Preferably, a third circular ring extending outward is provided on the outer circumference of the center adjustment cylinder, and the lower end surface of the third circular ring abuts against the upper end of the third circumferential step.

[0024] Preferably, the upper joint, the outer straightening tube, the main body, the lower connecting tube and the lower joint are respectively 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 faucet seat and the shaft sleeve, thereby realizing dual control. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2This is a schematic diagram of a dual-control intelligent measuring and adjusting water injection tool suitable for offshore oil fields (the water outlet opening is controlled by a shaft sleeve) according to the present invention.

[0028] Figure 3 It is a schematic diagram of a dual-control intelligent measuring and adjusting water injection tool suitable for offshore oil fields of the present invention (the water outlet opening is controlled by a water nozzle seat).

[0029] Figure 4 It is a schematic diagram of the center adjustment cylinder in the present invention.

[0030] Figure 5 It is a schematic diagram of the faucet seat in the present invention.

[0031] Figure 6 It is a schematic diagram of the motor in the present invention.

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

[0033] Figure 8 This is a schematic diagram of the test and adjustment instrument. DETAILED DESCRIPTION

[0034] The invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement it according to the description.

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

[0036] like Figure 1-8 As shown, a dual-control intelligent measurement and adjustment water injection tool 1 suitable for offshore oil fields of the present invention comprises:

[0037] The upper joint 110 is a cylindrical structure, and a positioning step 111 extending inward is provided on the inner circumference of the middle part of the upper joint 110; the positioning step 111 is used to cooperate with the positioning arm 210 in the middle part of the measuring and adjusting instrument 2; a first circumferential step 112 and a second circumferential step 113 are respectively provided on the inner circumference and the outer circumference of the lower part of the upper joint 110; a pair of first crescent holes 114 are evenly distributed on the positioning step and are axially penetrated;

[0038] The upper end of the outer straightening cylinder 120 is connected to the upper joint 110. A first circular ring 121 extending inward is provided on the inner circumference of the middle part of the outer straightening cylinder 120. A pair of second crescent holes 122 axially penetrating therethrough are evenly distributed on the first circular ring 121. The second crescent holes 122 are directly opposite to the first crescent holes 114.

[0039] The main body 130, the upper end of which is connected to the said outer cylinder 120, is provided with a third circumferential step 131 extending inwardly at the inner circumference of the lower part of the main body 130; the said third circumferential step 131 is provided with an axial first through hole 132, and the middle part of the said first through hole 132 is provided with a radially outward water outlet 133;

[0040] A lower connecting tube 140, the upper end of which is connected to the main body 130, a fourth circumferential step 141 is provided on the inner circumference of the lower middle part of the lower connecting tube 140, a second through hole 142 is axially penetrated on the fourth circumferential step, and the second through hole 142 is located directly below the second through hole 142;

[0041] A lower joint 150, the upper end of which is connected to the lower connecting tube 140, and an axial countersunk hole 151 is provided on the lower joint 150, and the countersunk hole is located directly below the second through hole 142;

[0042] The outer circumference of the center adjustment cylinder 160 is matched with the inner circumference of the positioning step 111, the first circular ring 121, the third circumferential step 131, the fourth circumferential step 141 and the lower joint 150; a second circular ring 161 extending outward is provided in the upper part of the center adjustment cylinder 160; a pair of third crescent holes 162 are evenly distributed on the second circular ring 161; the upper end face and the lower end face of the second circular ring 161 are smooth planes respectively, and the upper end face of the second circular ring 161 is compatible with the upper joint 111 0; the lower end surface of the second circular ring 161 is in contact with the upper end of the first circular ring 121; a pair of adjustment grooves 163 are provided in the upper middle part of the center adjustment cylinder 160, and the adjustment grooves 163 are used to cooperate with the elastic arms 220 at the lower part of the measuring and adjusting instrument 2; a pair of flow grooves 164 are provided in the lower middle part of the center adjustment cylinder 160; a first gear structure 165 is provided on the outer periphery of the lower end of the center adjustment cylinder 160; the center adjustment cylinder 160 is used to rotate under the drive of the measuring and adjusting instrument 2;

[0043] A first preload spring 115 and a second preload spring 116 are respectively arranged in the first circumferential step 112 and the second circumferential step 113, and the upper ends of the first preload spring 115 and the second preload spring 116 abut against the upper joint 110; and the lower ends of the first preload spring 115 and the second preload spring 116 abut against the second circular ring 161;

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

[0045] The faucet seat 172 is at least partially disposed in the first inner hole of the adjusting seat 171. The lower part of the faucet seat 172 is provided with a second peripheral edge 172a extending outward, and the second peripheral edge 172a is provided with an external thread matching the internal thread; a flow hole 172b is radially provided on the side wall of the faucet seat 172; the faucet seat 172 is used to axially rise and fall under the drive of the adjusting seat 171, thereby controlling the opening and closing degree of the water outlet 133;

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

[0047] Among them, the third crescent hole 162 at least partially overlaps with the first crescent hole 114 and the second crescent hole 122; the lower inner periphery of the straightening outer cylinder 120 and the lower end surface of the first ring 121, the upper and middle outer periphery of the center adjustment cylinder 160 and the upper inner periphery of the main body 130 form a cavity 123, the first crescent hole 114, the second crescent hole 122, and the third crescent hole 162 are connected to the upper part of the cavity 123, the adjustment 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 the opening and closing degree of the water outlet 133 needs to be adjusted, an electrical signal can be sent to the control module 182, and the control module 182 controls the motor 181, and the motor 181 drives the sleeve 184 to rise and fall through the transmission rod 183, thereby controlling the opening and closing degree of the water outlet 133; the measuring and adjusting instrument 2 can also 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 adjustment groove 163; then the controller 240 on the measuring and adjusting instrument 2 controls the motor 230 to output rotational power, and drives the central adjustment cylinder 160 to rotate through the elastic arm 220, and the central adjustment cylinder 160 drives the second gear structure 171a through the first gear structure 165; and then drives the adjustment seat 171 to rotate, and the faucet seat 172 is axially lifted and lowered under the drive of the adjustment seat 171, and the opening and closing degree of the water outlet 133 is adjusted by changing the overlap degree of the flow hole 172b and the water outlet 133.

[0049] In another embodiment, it also includes:

[0050] A fixing ring 191, which is threadedly disposed on an upper portion of the first through hole 132;

[0051] The orifice flowmeter 192 is disposed on the upper portion of the first through hole 132 and above the fixing ring 191 , and is used to detect the pressure and flow through the water outlet.

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

[0053] In another embodiment, a pair of anti-rotation blocks 172 c are provided on the outer periphery of the middle portion of the faucet seat 172 ; and a limiting groove matched with the anti-rotation blocks 172 c is provided on the inner periphery of the upper portion of the adjustment seat 171 .

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

[0055] In another embodiment, a third circular ring 166 extending outward is provided on the outer circumference of the center adjustment cylinder 160 , and a lower end surface of the third circular ring 166 abuts against an upper end of the third circumferential step 131 .

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

[0057] In summary, the dual-control intelligent measuring and adjusting water injection tool 1 of the present invention is suitable for offshore oil fields. The opening and closing degree of the water outlet 133 is controlled by the water nozzle seat 172 and the shaft sleeve 184 to achieve dual control.

[0058] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the 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 joint is a cylindrical structure, and a positioning step extending inward is provided on the inner circumference of the middle part of the upper joint; the positioning step is used to cooperate with the positioning arm in the middle part of the measuring and adjusting instrument; a first circumferential step and a second circumferential step are respectively provided on the inner circumference and outer circumference of the lower part of the upper joint; a pair of first crescent holes penetrating axially are evenly distributed on the positioning step; The upper end of the outer straightening cylinder is connected to the upper joint, and a first circular ring extending inward is provided on the inner circumference of the middle part of the outer straightening cylinder, and a pair of second crescent holes penetrating axially are evenly distributed on the first circular ring; the second crescent holes are directly opposite to the first crescent holes; A main body, the upper end of which is connected to the outer straightening cylinder, a third circumferential step extending inward is provided on the inner circumference of the middle and lower part of the main body; a first axial through hole is provided on the third circumferential step, and a water outlet radially outward is provided in the middle of the first through hole; A lower connecting tube, the upper end of which is connected to the main body, a fourth circumferential step is provided on the inner circumference of the lower middle part of the lower connecting tube, a second through hole axially penetrating is provided on the fourth circumferential step, and the second through hole is located directly below the second through hole; A lower joint, the upper end of which is connected to the lower connecting tube, and an axial countersunk hole is provided on the lower joint, and the countersunk hole is located directly below the second through hole; A center adjustment cylinder, the outer circumference of which is adapted to the positioning step, the first circular ring, the third circular step, the fourth circular step and the inner circumference of the lower joint; a second circular ring extending outward is provided at the upper middle part of the center adjustment cylinder; a pair of third crescent holes are evenly distributed on the second circular ring; the upper end face and the lower end face of the second circular ring are respectively smooth planes, and the upper end face of the second circular ring abuts against the lower end of the upper joint; the lower end face of the second circular ring abuts against the upper end of the first circular ring; a pair of adjustment grooves are provided at the upper middle part of the center adjustment cylinder, and the adjustment grooves are used to cooperate with the elastic arms at the lower part of the measuring and adjusting instrument; a pair of flow grooves are provided at the lower middle part of the center adjustment cylinder; a first gear tooth structure is provided at the outer circumference of the lower end of the center adjustment cylinder; the center adjustment cylinder is used to rotate driven by the measuring and adjusting instrument; A first preload spring and a second preload spring, which are respectively arranged in 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 joint; the lower ends of the first preload spring and the second preload spring abut against the second circular ring; An adjustment seat is rotatably arranged on the upper part of the second through hole, a second gear tooth structure is arranged on the outer periphery of the adjustment seat, and the second gear tooth structure is meshed with the first gear tooth structure; a first inner hole is arranged at the center of the adjustment seat, and an internal thread is arranged on the inner periphery of the first inner hole; the adjustment seat is used to rotate under the drive of the central adjustment cylinder; A faucet seat, which is at least partially arranged in the first inner hole of the adjustment seat, a second peripheral edge extending outward is arranged at the lower part of the faucet seat, and an external thread matching the internal thread is arranged on the second peripheral edge; a flow hole is radially arranged on the side wall of the faucet seat; the faucet seat is used to axially rise and fall under the drive of the adjustment seat, thereby controlling the opening and closing degree of the water outlet; A motor is arranged at the lower part of the second through hole; a control module is arranged at the lower end of the motor; an output shaft of the motor is connected to a transmission rod, the transmission rod is inserted into the faucet seat, a shaft sleeve is arranged at the upper end of the transmission rod, and the motor is used to drive the shaft sleeve to rise and fall, thereby controlling the opening and closing degree of the water outlet; Among them, the third crescent hole at least partially overlaps with the first crescent hole and the second crescent hole; the inner circumference of the lower part of the straightening outer cylinder and the lower end surface of the first circular ring, the upper outer circumference of the center adjustment cylinder and the upper inner circumference of the main body form a cavity, the first crescent hole, the second crescent hole and the third crescent hole are connected to the upper part of the cavity, the adjustment groove and the flow groove are connected to the side of the cavity; 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 is characterized in that: Also includes: A fixing ring, which is threadedly arranged on the upper portion of the first through hole; An orifice flow meter is arranged on the upper part of the first through hole and located above the fixing ring, and is used to detect the pressure and the flow through the water outlet.

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

4. The dual-control intelligent water injection tool for offshore oil fields according to claim 1 is characterized in that: A pair of anti-rotation blocks are arranged on the outer periphery of the middle part of the faucet seat; and a limiting groove matched with the anti-rotation blocks is arranged on the inner periphery of the upper part of the adjustment seat.

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

6. The dual-control intelligent water injection tool for offshore oil fields according to claim 1 is characterized in that: A third circular ring extending outward is provided on the outer circumference of the center adjustment cylinder, and the lower end surface of the third circular 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 is characterized in that: The upper joint, the outer straightening cylinder, the main body, the lower connecting cylinder and the lower joint are respectively connected through a pull ring structure and sealed through an O-ring.

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