Same-well oil extraction and gas injection shaft device for sealing and storing carbon dioxide in seabed saline water layer

Abstract

The same-well oil extraction and gas injection shaft device comprises an oil pipe hanger, the lower end of the oil pipe hanger is fixedly connected with a milling extension cylinder, the lower end of the milling extension cylinder is fixedly connected with a screen pipe, the lower end of the screen pipe communicates with a suspension packer, and the suspension packer is fixedly connected with the oil pipe hanger. An annular groove is formed in the lower end of the mandrel hanger, an annular block is slidably connected into the annular groove, and the lower end of the annular block extends to the outside and is fixedly connected with a circular ring. Two sponge blocks are driven to rotate through operation of a driving motor, so that seawater on the outer wall of the same-well oil extraction and gas injection shaft device can be adsorbed, corrosion of the seawater to the outer wall of the same-well oil extraction and gas injection shaft device is reduced, and meanwhile, through switching use of the sponge blocks, when the same-well oil extraction and gas injection shaft device shrinks, the seawater is prevented from flowing out of the outer wall of the same-well oil extraction and gas injection shaft device. The adsorption effect on seawater on the outer wall of the device can be ensured, and by arranging an extrusion block, seawater in the sponge can be extruded out, so that the sponge block can be recycled.

Description

Technical Field

[0001] The invention relates to the technical field of oil production and gas injection wellbore, and in particular to a same-well oil production and gas injection wellbore device for storing carbon dioxide in a seabed saline layer. Background Art

[0002] As the emission of carbon dioxide increases year by year, if the emission of carbon dioxide is not strictly controlled, it will have serious consequences on the economy, environment and public health of my country and even the world. Therefore, it is necessary to seal and treat carbon dioxide. The existing technology usually uses oil production and gas injection wellbore devices for marine sealing;

[0003] In the process of ocean sealing, it is necessary to use a milling extension tube to place a hanging packer into the seabed to seal the carbon dioxide. In the process of sealing, the milling extension tube, screen tube and hanging packer are mostly located in seawater. When recovering, the seawater will adhere to the outer walls of the milling extension tube, screen tube and hanging packer. Due to the high salt content in the seawater, the milling extension tube, screen tube and hanging packer will be corroded, resulting in a reduction in the service life of the same-well oil production and gas injection wellbore device. In addition, since the milling extension tube will shrink, seawater may enter the interior of the milling extension tube, resulting in a greater degree of corrosion to the milling extension tube by seawater. Therefore, it is necessary to design a same-well oil production and gas injection wellbore device for sealing carbon dioxide in seabed saline layers to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and a same-well oil production and gas injection wellbore device for storing carbon dioxide in a seabed saline layer is proposed. Through the operation of a driving motor, two sponge blocks are driven to rotate, so that seawater on the outer wall of the same-well oil production and gas injection wellbore device can be adsorbed, reducing the corrosion of the outer wall of the same-well oil production and gas injection wellbore device by seawater. At the same time, by switching the sponge blocks, the adsorption effect of seawater on the outer wall of the device can be ensured when the same-well oil production and gas injection wellbore device is contracted, and by the setting of the extrusion block, the seawater in the sponge can be squeezed out, so that the sponge block can be recycled.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The cam is connected with a toothed tube, and the toothed tube has a bottom end which is fixedly connected to the bottom end of the oil pipe, and a toothed tube has a bottom end which is fixedly connected to the bottom end of the oil pipe.

[0007] Preferably, a trigger assembly is provided at the lower end of the oil pipe hanger, and the trigger assembly includes a control groove arranged at the lower end of the oil pipe hanger, a stop block is slidably connected in the control groove, the stop block is elastically connected to the inner top of the control groove through a first spring, a stop rod is fixedly connected to the upper end of the ring, a pressure rod is fixedly connected to the upper end of the stop block, and a pressure sensor is provided at the inner top of the control groove.

[0008] Preferably, it also includes a rotating assembly, which includes two rectangular boxes arranged at the lower end of the circular ring, the two electric telescopic rods both penetrate the corresponding rectangular boxes, the two rectangular boxes are fixedly connected to a pneumatic rod on one side close to the milling extension tube, the telescopic ends of the two pneumatic rods are fixedly connected to a moving block, the opposite sides of the two moving blocks are fixedly connected to a rack, and the two electric telescopic rods are provided with a second gear.

[0009] Preferably, the adjacent side inner walls of each two matching mobile boxes are provided with a first electromagnet, and each mobile box is slidably connected with a cross bar, each cross bar is elastically connected to the adjacent side of the corresponding first electromagnet through a second spring, and each cross bar is fixedly connected to the corresponding sponge block.

[0010] Preferably, each of the cross bars is provided with an extrusion assembly, and the extrusion assembly includes vertical blocks arranged on the upper and lower sides of the cross bar, each of the vertical blocks is provided with a guide groove on the side away from the vertical bar, each of the guide grooves is slidably connected with a guide block, each of the guide blocks is fixedly connected with a fixed block on the side away from the vertical bar, each of the fixed blocks is fixedly connected with an extrusion block, the two extrusion blocks are fixedly connected to the upper and lower ends of the sponge block, the adjacent sides of the two guide grooves are provided with a second electromagnet, and each of the second electromagnets is elastically connected to the adjacent side of the corresponding guide block through a third spring.

[0011] Preferably, two conductive rods are fixedly connected to the outer walls of the two electric telescopic rods, and the lower ends of the two rectangular boxes are provided with conductive blocks that match the conductive rods.

[0012] Preferably, each of the conductive rods and the corresponding conductive block constitute a conductive switch, a power supply is provided on the oil pipe hanger, the power supply, multiple conductive switches and the second electromagnets constitute a loop through wires, each of the conductive switch and the corresponding two second electromagnets constitute a series circuit, and multiple series circuits are connected in parallel in the loop.

[0013] Preferably, the lower ends of the vertical blocks located at the bottom are fixedly connected to mounting blocks, and an infrared distance sensor is installed on a side of each mounting block away from the vertical rod.

[0014] The present invention has the following beneficial effects:

[0015] 1. Compared with the prior art, by setting the driving motor and the sponge block, when the wellbore device for oil production and gas injection in the same well is contracted, the sponge block is used to make a circular motion to absorb the seawater on the outer wall of the device, so that the device will not be corroded by the salt in the seawater when not in use, thereby extending the service life of the device;

[0016] 2. Compared with the prior art, the infrared distance sensor and the first electromagnet are arranged so that when the device is contracted, the sponge block can be controlled to always contact the outer wall of the milling extension tube, the screen tube and the hanging packer, so that the seawater adhering to the outer wall of the milling extension tube, the screen tube and the hanging packer can be cleaned;

[0017] 3. Compared with the prior art, the setting of the rotating assembly enables multiple sponge blocks to be used alternately during the contraction of the device, so that the sponge blocks can absorb as much seawater as possible on the outer wall of the device, thereby ensuring the cleaning effect of the seawater on the outer wall of the device;

[0018] 4. Compared with the prior art, by setting the squeezing blocks, when the sponge block is away from the oil production and gas injection wellbore device in the same well, the two squeezing blocks will move relative to each other to squeeze the sponge block, thereby squeezing the water in the sponge block, so that multiple sponge blocks can be used alternately and cyclically. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a wellbore device for oil production and gas injection in a submarine saline layer for storing carbon dioxide, as proposed by the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0022] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0023] Figure 5 for Figure 2 Schematic diagram of the enlarged structure at D in the middle.

[0024] In the figure: 1 tubing hanger, 2 milling extension tube, 3 screen tube, 4 suspension packer, 5 drive motor, 6 first gear, 7 annular groove, 8 annular block, 9 circular ring, 10 tooth edge, 11 rectangular box, 12 pneumatic rod, 13 rack, 14 extrusion block, 15 sponge block, 16 infrared distance sensor, 17 vertical rod, 18 control groove, 19 first spring, 20 pressure sensor, 21 block, 22 rod, 23 electric telescopic rod, 24 second gear, 25 moving block, 26 conductive block, 27 first electromagnet, 28 second spring, 29 cross bar, 30 vertical block, 31 second electromagnet, 32 third spring, 33 guide block, 34 fixed block, 35 moving box. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Reference Figure 1-Figure 5 , a wellbore device for oil production and gas injection in the same well for storing carbon dioxide in a submarine saline layer, comprising an oil pipe hanger 1, a milling extension tube 2 is fixedly connected to the lower end of the oil pipe hanger 1, a screen tube 3 is fixedly connected to the lower end of the milling extension tube 2, a hanging packer 4 is connected to the lower end of the screen tube 3, an annular groove 7 is provided at the lower end of the oil pipe hanger 1, an annular block 8 is slidably connected in the annular groove 7, the lower end of the annular block 8 extends to the outside and is fixedly connected to a circular ring 9, a plurality of electric telescopic rods 23 are rotatably connected to the lower end of the circular ring 9, the telescopic ends of the two electric telescopic rods 23 are fixedly connected to vertical rods 17, the left and right sides of the two vertical rods 17 are fixedly connected to moving boxes 35, a sponge block 15 is provided on the side of each moving box 35 away from the corresponding vertical rod 17, a plurality of tooth edges 10 are fixedly connected to the outer wall of the circular ring 9, a driving motor 5 is installed at the upper end of the oil pipe hanger 1, and the output shaft end of the driving motor 5 passes through the oil pipe hanger 1 and is fixedly connected to the first gear 6.

[0027] Among them, a trigger assembly is provided at the lower end of the oil pipe hanger 1, and the trigger assembly includes a control groove 18 arranged at the lower end of the oil pipe hanger 1, a stop block 21 is slidably connected in the control groove 18, the stop block 21 is elastically connected to the inner top of the control groove 18 through a first spring 19, a stop rod 22 is fixedly connected to the upper end of the ring 9, a pressure rod is fixedly connected to the upper end of the stop block 21, a pressure sensor 20 is provided at the inner top of the control groove 18, and a controller is provided on the oil pipe hanger 1. The pressure sensor 20 generates an electrical signal which is transmitted to the controller, and the controller controls the two pneumatic rods 12 to contract and stretch once.

[0028] It also includes a rotating component, which includes two rectangular boxes 11 arranged at the lower end of the ring 9, two electric telescopic rods 23 both penetrate the corresponding rectangular boxes 11, the two rectangular boxes 11 are fixedly connected to the side close to the milling extension tube 2 with a pneumatic rod 12, the telescopic ends of the two pneumatic rods 12 are fixedly connected to moving blocks 25, and the opposite sides of the two moving blocks 25 are fixedly connected to racks 13, and the two electric telescopic rods 23 are each provided with a second gear 24, and a one-way bearing is provided between the electric telescopic rod 23 and the second gear 24, so that when the rack 13 moves toward the milling extension tube 2, the second gear 24 drives the electric telescopic rod 23 to rotate, and when the rack 13 moves away from the milling extension tube 2, the second gear 24 will not drive the electric telescopic rod 23 to rotate.

[0029] Among them, the inner walls of the adjacent sides of each two matched moving boxes 35 are provided with a first electromagnet 27, and each moving box 35 is slidably connected with a cross bar 29, which is made of iron material. When the first electromagnet 27 is energized, an attraction is generated on the cross bar 29, and each cross bar 29 is elastically connected to the adjacent side of the corresponding first electromagnet 27 through a second spring 28. Each cross bar 29 is fixedly connected to the corresponding sponge block 15, and each cross bar 29 is provided with an extrusion assembly, which includes vertical blocks 30 arranged on the upper and lower sides of the cross bar 29, and each vertical block 30 is away from the vertical bar 17. A guide groove is provided on one side, and a guide block 33 is slidably connected in each guide groove. A fixed block 34 is fixedly connected to the side of each guide block 33 away from the vertical rod 17. An extrusion block 14 is fixedly connected to each fixed block 34. The two extrusion blocks 14 are fixedly connected to the upper and lower ends of the sponge block 15. Second electromagnets 31 are provided on the adjacent sides of the two guide grooves. Each second electromagnet 31 is elastically connected to the adjacent side of the corresponding guide block 33 through a third spring 32. The guide block 33 is made of metal material. When the second electromagnet 31 is energized, it generates an attractive force on the guide block 33.

[0030] Among them, the outer walls of the two electric telescopic rods 23 are fixedly connected to two conductive rods, the lower ends of the two rectangular boxes 11 are provided with conductive blocks 26 that match the conductive rods, each conductive rod and the corresponding conductive block 26 constitute a conductive switch, and a power supply is provided on the oil pipe hanger 1. The power supply, multiple conductive switches and the second electromagnet 31 form a loop through a wire, and each conductive switch and the corresponding two second electromagnets 31 constitute a series circuit. Multiple series circuits are connected in parallel in the loop, and the lower ends of the vertical blocks 30 located below are fixedly connected to mounting blocks, and each mounting block An infrared distance sensor 16 is installed on the side away from the vertical rod 17. The infrared distance sensor 16 generates an electrical signal according to the detected distance and transmits it to the controller. The controller controls the current of the first electromagnet 27. When the distance detected by the infrared distance sensor 16 is shorter, the current passing through the first electromagnet 27 is larger, the attraction to the cross bar 29 is larger, and the cross bar 29 moves to the left. When the distance detected by the infrared distance sensor 16 is shorter, the current passing through the first electromagnet 27 will decrease from large, and the attraction to the cross bar 29 will be smaller, and the cross bar 29 will move to the right.

[0031] The functional principle of the present invention can be explained through the following operation mode: the carbon dioxide is sealed in the ocean through the milling extension tube 2, the screen tube 3 and the hanging packer 4. When the sealing is completed, when it is necessary to control the contraction of the wellbore device for oil production and gas injection in the same well, the staff controls the electric telescopic rod 23 to stretch, and then controls the sponge block 15 to move down to a certain distance, so that the sponge block 15 is located in the contraction area of ​​the milling extension tube 2 (at this time, the sponge block 15 is located above the sea water), and starts the infrared distance sensor 16 and the drive motor 5;

[0032] The infrared distance sensor 16 emits infrared rays to judge the distance between the milling extension tube, the screen tube 3 or the suspension packer 4, and then generates different electrical signals. These electrical signals are transmitted to the controller, and the controller controls the current passing through the first electromagnet 27, thereby controlling the size of the attraction to the cross bar 29. That is, when the distance detected by the infrared distance sensor 16 is shorter, the current passing through the first electromagnet 27 is larger, the attraction to the cross bar 29 is larger, and the cross bar 29 moves to the left. When the distance detected by the infrared distance sensor 16 is shorter, the current passing through the first electromagnet 27 decreases from large to small, and the attraction to the cross bar 29 is smaller. At this time, the cross bar 29 moves to the right, so that the sponge block 15 can always be in contact with the outer wall of the milling extension tube 2, the screen tube 3 and the suspension packer 4, ensuring complete adsorption to the outer wall of the wellbore device for oil production and gas injection in the same well;

[0033] The operation of the driving motor 5 will drive the first gear 6 to rotate, thereby causing the ring 9 to rotate, and then causing the sponge block 15 to make a circular motion around the wellbore device for oil production and gas injection, ensuring that the seawater on the outer wall of the wellbore device for oil production and gas injection is completely adsorbed. When the ring 9 rotates one circle, the push rod 22 will contact the push block 21 again, so that the push block 21 drives the pressure rod to move upward, and then the pressure sensor 20 generates an electrical signal to transmit to the controller. The controller controls the two pneumatic rods 12 to contract and stretch once, so that the positions of the two sponge blocks 15 on the same side are exchanged, so that the new sponge adsorbs the seawater on the outer wall of the device;

[0034] It is worth mentioning that, since the device shrinks slowly and the two sponge blocks 15 exchange positions quickly, and the sponge blocks 15 have a certain height, there will be no dead corners in cleaning;

[0035] After the position of the sponge block 15 is exchanged, the conductive rod will contact the conductive block 26, so that the corresponding second electromagnet 31 is energized, generating an attractive force on the guide block 33, causing the two squeezing blocks 14 to move relative to each other, thereby squeezing the sponge block 15 and squeezing out the adsorbed seawater, so that the sponge block 15 can be recycled.

[0036] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wellbore device for oil production and gas injection in a submarine saline layer for storing carbon dioxide, comprising an oil pipe hanger (1), characterized in that: The lower end of the tubing hanger (1) is fixedly connected to a milling extension tube (2), the lower end of the milling extension tube (2) is fixedly connected to a screen tube (3), the lower end of the screen tube (3) is connected to a hanging packer (4), the lower end of the tubing hanger (1) is provided with an annular groove (7), an annular block (8) is slidably connected in the annular groove (7), the lower end of the annular block (8) extends to the outside and is fixedly connected to a circular ring (9), the lower end of the circular ring (9) is rotatably connected to a plurality of electric telescopic rods (23), two of the electric telescopic rods (23) are connected to the lower end of the tubing hanger (1), and the two electric telescopic rods (23) are connected to the lower end of the tubing hanger (1). The telescopic ends of the movable telescopic rod (23) are fixedly connected to the vertical rod (17), the left and right sides of the two vertical rods (17) are fixedly connected to the moving boxes (35), and each of the moving boxes (35) is provided with a sponge block (15) on the side away from the corresponding vertical rod (17). The outer wall of the circular ring (9) is fixedly connected to a plurality of tooth edges (10), and the upper end of the oil pipe hanger (1) is installed with a driving motor (5), and the output shaft end of the driving motor (5) passes through the oil pipe hanger (1) and is fixedly connected to the first gear (6).

2. The device for gas injection and oil production in a wellbore for storing carbon dioxide in a seabed saline layer according to claim 1, characterized in that: The lower end of the oil pipe hanger (1) is provided with a trigger assembly, and the trigger assembly includes a control groove (18) arranged at the lower end of the oil pipe hanger (1), a stop block (21) is slidably connected in the control groove (18), the stop block (21) is elastically connected to the inner top of the control groove (18) through a first spring (19), the upper end of the ring (9) is fixedly connected with a stop rod (22), the upper end of the stop block (21) is fixedly connected with a pressure rod, and the inner top of the control groove (18) is provided with a pressure sensor (20).

3. The wellbore device for oil production and gas injection in a submarine saline layer for storing carbon dioxide according to claim 1, characterized in that: The invention also comprises a rotating assembly, wherein the rotating assembly comprises two rectangular boxes (11) arranged at the lower end of the circular ring (9), the two electric telescopic rods (23) both penetrate the corresponding rectangular boxes (11), the two rectangular boxes (11) are fixedly connected to a pneumatic rod (12) on one side close to the milling extension tube (2), the telescopic ends of the two pneumatic rods (12) are fixedly connected to a moving block (25), the opposite sides of the two moving blocks (25) are fixedly connected to a rack (13), and the two electric telescopic rods (23) are provided with a second gear (24).

4. The wellbore device for oil production and gas injection for storing carbon dioxide in a seabed saline layer according to claim 1, characterized in that: The adjacent side inner walls of each two matched moving boxes (35) are provided with a first electromagnet (27), and each moving box (35) is slidably connected with a cross bar (29), and each cross bar (29) is elastically connected to the adjacent side of the corresponding first electromagnet (27) through a second spring (28), and each cross bar (29) is fixedly connected to the corresponding sponge block (15).

5. The device for oil production and gas injection in a seabed saline layer for storing carbon dioxide according to claim 4, characterized in that: Each of the cross bars (29) is provided with an extrusion assembly, and the extrusion assembly comprises vertical blocks (30) arranged on the upper and lower sides of the cross bar (29); each of the vertical blocks (30) is provided with a guide groove on the side away from the vertical bar (17); each of the guide grooves is slidably connected with a guide block (33); each of the guide blocks (33) is fixedly connected with a fixed block (34) on the side away from the vertical bar (17); each of the fixed blocks (34) is fixedly connected with an extrusion block (14); the two extrusion blocks (14) are fixedly connected to the upper and lower ends of the sponge block (15); the adjacent sides of the two guide grooves are provided with a second electromagnet (31); each of the second electromagnets (31) is elastically connected to the adjacent side of the corresponding guide block (33) via a third spring (32).

6. The wellbore device for oil production and gas injection in a submarine saline layer for storing carbon dioxide according to claim 5, characterized in that: Two conductive rods are fixedly connected to the outer walls of the two electric telescopic rods (23), and the lower ends of the two rectangular boxes (11) are provided with conductive blocks (26) matching with the conductive rods.

7. The device for gas injection and oil production in a wellbore for storing carbon dioxide in a seabed saline layer according to claim 6, characterized in that: Each of the conductive rods and the corresponding conductive block (26) form a conductive switch. A power source is provided on the oil pipe hanger (1). The power source, a plurality of conductive switches and the second electromagnet (31) form a loop through a conductor. Each of the conductive switches and the corresponding two second electromagnets (31) form a series circuit. The plurality of series circuits are connected in parallel in the loop.

8. The device for oil production and gas injection in a wellbore for storing carbon dioxide in a seabed saline layer according to claim 6, characterized in that: The lower ends of the vertical blocks (30) located at the bottom are fixedly connected to mounting blocks, and an infrared distance sensor (16) is mounted on a side of each mounting block away from the vertical rod (17).

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