CN112412405A - Water injection device for changing layer without moving pipe column - Google Patents

Abstract

A water injection device for changing the layer of a fixed tubular column comprises an upper joint, an upper spring, an upper inner tube, an upper switch tube, an upper pin seat, an upper pin, an upper sealing ring, an upper switch, an upper sealing ring, a lower switch, a lower sealing ring, a lower pin seat, a lower switch tube, a lower inner tube, a lower spring and a lower joint, wherein the upper inner open groove is not communicated with the upper outer open groove through water injection and water stop, the lower outer open groove is communicated with the lower inner open groove, the purpose of water injection for changing the layer of the fixed tubular column is realized, water injection is stopped, the lower inner open groove is not communicated with the lower outer open groove, and the upper outer open groove is communicated with the upper inner open groove, therefore, the water injection layer is convenient and quick to change, the operation procedure can be reduced, and the operation cost can be reduced, can improve the development benefit of the oil field and has obvious economic benefit.

Description

Water injection device for changing layer without moving pipe column

Technical Field

The invention belongs to equipment for oilfield water injection, and relates to a device installed in a water injection well, in particular to a fixed pipe column layer-changing water injection device.

Background

The water injection well has a plurality of water injection layers which need water injection at different pressures and different times, and sometimes, when one layer is injected with water, the other layer is not injected with water. At present, one layer is injected with water, the other layer is not injected with water and then is changed into the other layer for injecting water, the method for not injecting water for the one layer is to test a vehicle, a fisher is put into a water injection pipe, water distribution cores at two layers are respectively fished out for replacement, and then the fisher is put into a corresponding water distributor, and the method has the advantages of large workload and long allocation time. At present, another method for realizing water injection at one layer and not at the other layer is to carry out operation, a separate-layer water injection pipe column is completely put out, and then a water injection pipe column with a changed layer is put in.

Disclosure of Invention

The invention aims to design a water injection device for changing a layer of an immobile pipe column, which realizes the change of a water injection layer by switching on and off a water injection well, overcomes the problems and ensures that the water injection layer is convenient and quick to change.

The purpose of the invention is realized as follows: the upper switch tube is provided with an upper rail and an upper inner slot, the upper switch seat and the packer are sleeved outside the connecting tube, the lower part of the upper switch seat is connected with the upper part of the inner tube of the packer, the upper inner tube is sleeved outside the upper switch tube, the lower part of the upper inner tube is in threaded connection with the middle part of the upper switch seat, the upper inner tube is provided with an upper slot and an upper slot, the lower inner tube is sleeved outside the upper switch tube, the upper switch seat is provided with a lower switch seat, the upper pin seat is provided with an upper pin, the lower pin seat is provided with a lower pin, the lower switch seat is provided with a lower inner tube, the lower switch seat is provided with a lower pin, the lower switch seat is provided with an upper inner slot, the lower inner tube is provided with a lower switch seat, the packer, the lower part of the upper switch seat is connected with the upper part of the inner tube of the packer, the upper inner tube is sleeved outside the upper switch, An upper outer open slot communicated with the upper inner open slot, the upper end of the upper outer open slot is positioned below an upper sealing ring, the lower end of the upper outer open slot is positioned above an upper sealing ring and a lower sealing ring, an upper switch is arranged in the upper part of an upper switch seat, the outer wall of the lower part of the upper switch is sealed with the inner wall of the upper part of the upper switch seat, an upper pin passes through the upper slot and is inserted into an upper track, the upper pin seat is sleeved on an upper pin, the lower part of the upper pin seat is connected with the upper part of the upper switch, the upper pin moves along with the upper pin seat, an upper spring is sleeved on an upper inner tube, the lower end of the upper spring is seated on the upper pin seat, the lower part of an upper joint is connected with the upper part of an upper inner tube, a lower track and a lower inner open slot are arranged on a lower switch tube, a lower sealing ring and a lower sealing ring are arranged on the lower inner open slot, the upper sealing ring and the, the upper part of the lower switch tube is connected with the lower part of the connecting tube, the connecting tube is sleeved with a lower switch seat, the upper part of the lower switch seat is connected with the lower part of the inner tube of the packer, the lower inner tube is sleeved outside the lower switch tube, the upper part of the lower inner tube is in threaded connection with the middle part of the lower switch seat, the lower inner tube is provided with a lower outer open slot and a lower slot, the lower outer open slot and the lower inner open slot are positioned at the same height, the lower outer open slot is not communicated with the lower inner open slot, the upper end of the lower outer open slot is positioned below the lower upper sealing ring, the lower end of the lower outer open slot is positioned above the lower sealing ring, the lower switch is arranged in the lower part of the lower switch seat, the outer wall of the upper part of the lower switch is sealed with the inner wall of the lower part of the lower switch seat, the lower pin penetrates through the lower slot and is inserted into the lower track, the lower pin seat is sleeved, the lower spring is sleeved on the lower inner tube, the upper end of the lower spring is in contact with the lower end face of the lower pin seat, the upper portion of the lower joint is connected with the lower portion of the lower inner tube, when water is injected into the lower spring, hydraulic pressure is injected into the packer through the communicating hole in the connecting tube to expand the packer rubber cylinder, the injected water can flow out from the upper inner open groove, the upper outer open groove and the upper open switch in a jacking mode, meanwhile, the upper pin is in the upper track to go upwards, when the water is stopped to be injected into the lower spring, the upper pin seat and the upper open switch are pushed to go downwards, the upper pin seat drives the upper pin to go downwards, the upper open-close tube, the connecting tube and the lower open-close tube rotate for a certain angle under the action of the upper track, the upper inner open groove is not communicated with the upper outer open groove, and the lower.

The invention has the beneficial effects that: the upper inner open groove is not communicated with the upper outer open groove and the lower outer open groove is communicated with the lower inner open groove by water injection and water stop, so that the aim of water injection during layer changing of the immobile string is fulfilled, water injection is performed again, water injection is stopped again, the lower inner open groove is not communicated with the lower outer open groove, and the upper outer open groove is communicated with the upper inner open groove.

Drawings

FIG. 1 is a block diagram of the present invention.

Fig. 2 is a two-part broken-away structural view of fig. 1.

Figure 3 is a developed view of the surface of the track on the piece 4 in figure 1.

Figure 4 is a developed view of the surface of the track on the member 21 of figure 1.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.

As shown in the figure, the embodiment of the invention comprises an upper joint 1, an upper spring 2, an upper inner tube 3, an upper switch tube 4, an upper pin seat 5, an upper pin 6, an upper sealing ring 7, an upper switch 9, upper and lower sealing rings 10, an upper switch seat 11, a packer 12, a connecting tube 13, a lower switch seat 14, a lower upper sealing ring 15, a lower switch 17, a lower sealing ring 18, a lower pin 19, a lower pin seat 20, a lower switch tube 21, a lower inner tube 22, a lower spring 23 and a lower joint 24, wherein the upper switch tube 4 is provided with an upper rail 4-1 and an upper inner slot 4-2, the upper switch tube 4 is provided with the upper sealing ring 7 and the upper and lower sealing rings 10, the upper sealing ring 7 is positioned above the upper inner slot 4-2, the lower sealing ring 10 is positioned below the upper inner slot 4-2, the lower part of the upper switch tube 4 is connected with the upper part of the connecting tube 13, the upper switch seat 11, the upper switch seat, The lower part of an upper switch seat 11 is connected with the upper part of an inner tube of the packer 12, an upper inner tube 3 is sleeved outside an upper switch tube 4, the lower part of the upper inner tube 3 is in threaded connection with the middle part of the upper switch seat 11, an upper slot 3-1 and an upper outer slot 3-2 are arranged on the upper inner tube 3, the upper outer slot 3-2 is communicated with the upper inner slot 4-2, the upper end of the upper outer slot 3-2 is positioned below an upper sealing ring 7, the lower end of the upper outer slot 3-2 is positioned above an upper sealing ring 10, an upper switch 9 is arranged in the upper part of the upper switch seat 11, the lower outer wall of the upper switch 9 is sealed with the upper inner wall of the upper switch seat 11, an upper pin 6 penetrates through the upper slot 3-1 to be inserted into an upper rail 4-1, an upper pin seat 5 sleeves the upper pin 6, the lower part of the upper pin seat 5 is connected with the upper part of the upper switch, the upper pin 6 moves along with the upper pin seat 5 axially, the upper spring 2 is sleeved on the upper inner tube 3, the lower end of the upper spring 2 is seated on the upper pin seat 5, the lower part of the upper joint 1 is connected with the upper part of the upper inner tube 3, the lower switch tube 21 is provided with a lower rail 21-2 and a lower inner open slot 21-1, the lower switch tube 21 is provided with a lower upper sealing ring 15 and a lower sealing ring 18, the upper sealing ring 15 and the lower sealing ring 18 are arranged on the lower inner open slot 21-1, the lower sealing ring 18 is arranged below the lower inner open slot 21-1, the upper part of the lower switch tube 21 is connected with the lower part of the connecting tube 13, the lower switch seat 14 is sleeved outside the connecting tube 13, the upper part of the lower switch seat 14 is connected with the lower part of the inner tube of the packer 12, the lower inner tube 22 is sleeved outside the lower switch tube 21, the upper part of the lower inner tube 21 is in threaded connection with the, A lower slot 22-2, the lower outer slot 22-1 and the lower inner slot 21-1 are at the same height, the lower outer slot 22-1 is not communicated with the lower inner slot 21-1, the upper end of the lower outer slot 22-1 is below the lower upper sealing ring 15, the lower end of the lower outer slot 22-1 is above the lower sealing ring 18, the lower switch 17 is installed in the lower part of the lower switch base 14, the upper outer wall of the lower switch 17 is sealed with the lower inner wall of the lower switch base 14, the lower pin 19 passes through the lower slot 22-2 and is inserted into the lower rail 21-2, the lower pin base 20 is sleeved with the lower pin 19, the upper part of the lower pin base 20 is connected with the lower part of the lower switch 17, the lower pin 19 moves axially along with the lower pin base 20, the lower spring 23 is sleeved on the lower inner tube 22, the upper end of the lower spring 23 is in contact with the lower end face of the lower pin base 20, the upper part of the lower joint 24 is connected with the lower part of the lower inner tube 22, when water is injected into the lower joint, hydraulic pressure is injected into the packer 12 through the communicating hole on the connecting tube 13 to expand the rubber sleeve of the packer 12, the injected water can flow out from the upper inner open slot 4-2, the upper outer open slot 3-2 and the top switch 9, and simultaneously the upper pin 6 moves upwards in the upper track 4-1, when the water injection into the lower joint is stopped, the upper spring 3 pushes the upper pin seat 5 and the upper switch 9 to move downwards, the upper pin seat 5 drives the upper pin 6 to move downwards, the upper switch tube 4, the connecting tube 13 and the lower switch tube 21 rotate under the action of the upper track 4-1, so that the upper inner open slot 4-2 is not communicated with the upper outer open slot 3-2, and the lower outer open slot 22-1 is communicated with the lower inner open slot 21-1.

The invention is put into a water injection well along with a water injection pipe column and needs to be injected with water between two water injection layers, the state of figure 1 is that the upper water injection layer and the lower water injection layer are not injected with water,

when the ground is opened and water is injected, the injected water is injected into the packer 12 through the communicating hole on the connecting pipe 13, so that the rubber sleeve of the packer 12 expands the sealing sleeve to separate two water injection layers. The injected water flows out from the upper inner open slot 4-2, the upper outer open slot 3-2 and the upper switch 9 is pushed open, meanwhile, the upper pin 6 moves upwards in the upper track 4-1, the upper spring 2 is compressed, and at the moment, the lower switch 17 is not moved because the lower inner open slot 21-1 is not communicated with the lower outer open slot 22-1. When the water injection into the upper pin seat 5 and the upper switch 9 are stopped, the upper spring 3 pushes the upper pin seat 5 and the upper switch 9 to move downwards, the upper pin seat 5 drives the upper pin 6 to move downwards, the upper switch tube 4, the connecting tube 13 and the lower switch tube 21 rotate for a certain angle under the action of the upper track 4-1, so that the upper inner open slot 4-2 is not communicated with the upper outer open slot 3-2, the lower outer open slot 22-1 is communicated with the lower inner open slot 21-1, the upper water injection layer is not injected with water, and the lower water injection layer is injected with water. Realize automatic layer changing water injection. And injecting water again, stopping injecting water, and enabling the lower inner open groove 21-1 to be not communicated with the lower outer open groove 22-1 and the upper outer open groove 3-2 to be communicated with the upper inner open groove 4-2 so as to realize repeated layer water changing.

The upper switch tube 4 and the lower switch tube 21 cannot axially move.

An upper sealing groove 4-3 is further arranged beside the upper inner open groove 4-2 on the upper switch tube 4, after a sealing ring is arranged in the upper sealing groove 4-3, when the upper switch tube 4, the connecting tube 13 and the lower switch tube 21 rotate for a certain angle (90 ︒) under the power of the upper spring 3, the sealing ring arranged in the upper sealing groove 4-3 surrounds the upper outer open groove 3-2, so that the water on the upper water injection layer can not be dripped.

A lower sealing groove 21-3 is further arranged beside the lower inner open groove 21-1 on the lower switch tube 21, after a sealing ring is arranged in the lower sealing groove 21-3, when the lower switch tube 21, the connecting tube 13 and the upper switch tube 4 rotate for a certain angle (90 ︒) under the power of a lower spring 23, the sealing ring in the lower sealing groove 21-3 surrounds the lower outer open groove 22-1, so that the lower water injection layer does not inject water.

After the device is installed, the difference between the circumference of the lower inner open groove 21-1 and the circumference of the upper inner open groove 4-2 is 90 ︒, the number of the upper inner open grooves 4-2 is two and symmetrically arranged, the number of the lower inner open grooves 21-1 is two and symmetrically arranged, the number of the upper outer open grooves 3-2 is two and symmetrically arranged, and the number of the lower outer open grooves 22-1 is two and symmetrically arranged.

The two long tracks of the upper track 4-1 are symmetrically arranged, the long track of the upper track 4-1 is opened upwards, and the lower parts of the upper tracks 4-1 are communicated. The two long tracks of the lower track 21-2 are symmetrically arranged, the long track of the lower track 21-2 is downward, the upper parts of the lower track 21-2 are communicated, and the difference between the circumferences of the upper track 4-1 and the lower track 21-2 is 90 ︒.

Claims (3)

1. The utility model provides a motionless tubular column bed change water injection device, includes top connection (1), go up spring (2), go up inner tube (3), go up switch tube (4), go up round pin seat (5), go up round pin nail (6), go up sealing washer (7), go up switch (9), go up sealing washer (10) from top to bottom, go up switch seat (11), packer (12), connecting pipe (13), lower switch seat (14), lower sealing washer (15), lower switch (17), lower sealing washer (18), lower pin (19), lower round pin seat (20), lower switch tube (21), lower inner tube (22), lower spring (23), lower clutch (24), characterized by: an upper track (4-1) and an upper inner open groove (4-2) are arranged on the upper switch tube (4), an upper sealing ring (7) and an upper and lower sealing ring (10) are arranged on the upper switch tube (4), the upper sealing ring (7) is positioned above the upper inner open groove (4-2), the lower sealing ring (10) is positioned below the upper inner open groove (4-2), the lower part of the upper switch tube (4) is connected with the upper part of a connecting tube (13), a switch seat (11) and a packer (12) are sleeved outside the connecting tube (13), the lower part of the upper switch seat (11) is connected with the upper part of an inner tube of the packer (12), the upper inner tube (3) is sleeved outside the upper switch tube (4), the lower part of the upper inner tube (3) is connected with the middle part of the upper switch seat (11) in a threaded manner, an upper slot (3-1) and an upper outer open groove (3-2) are arranged on, the upper outer open slot (3-2) is communicated with the upper inner open slot (4-2), the upper end of the upper outer open slot (3-2) is positioned below an upper sealing ring (7), the lower end of the upper outer open slot (3-2) is positioned above an upper sealing ring and a lower sealing ring (10), an upper switch (9) is arranged in the upper part of an upper switch seat (11), the outer wall of the lower part of the upper switch (9) is sealed with the inner wall of the upper part of the upper switch seat (11), an upper pin (6) penetrates through the upper slot (3-1) and is inserted into an upper track (4-1), the upper pin seat (5) is sleeved on the upper pin (6), the lower part of the upper pin seat (5) is connected with the upper part of the upper switch (9), the upper pin (6) moves along with the axial direction of the upper pin seat (5), the upper spring (2) is sleeved on the upper inner tube (3), and the lower end of the upper spring (2) is seated on the upper pin seat (5), the lower part of the upper joint (1) is connected with the upper part of the upper inner pipe (3), a lower track (21-2) and a lower inner open groove (21-1) are arranged on the lower switch pipe (21), a lower sealing ring (15) and a lower sealing ring (18) are arranged on the lower switch pipe (21), the upper sealing ring (15) and the lower sealing ring (18) are arranged above the lower inner open groove (21-1), the lower sealing ring (18) is arranged below the lower inner open groove (21-1), the upper part of the lower switch pipe (21) is connected with the lower part of the connecting pipe (13), a lower switch seat (14) is sleeved outside the connecting pipe (13), the upper part of the lower switch seat (14) is connected with the lower part of the inner pipe of the packer (12), the lower inner pipe (22) is sleeved outside the lower switch pipe (21), the upper part of the lower inner pipe (21) is in threaded connection with the middle part of the lower switch seat (14), the lower inner pipe (22) is provided with a, The lower outer slot (22-2) and the lower inner slot (21-1) are positioned at the same height, the lower outer slot (22-1) is not communicated with the lower inner slot (21-1), the upper end of the lower outer slot (22-1) is positioned below the lower upper sealing ring (15), the lower end of the lower outer slot (22-1) is positioned above the lower sealing ring (18), the lower part of the lower switch seat (14) is internally provided with the lower switch (17), the upper outer wall of the lower switch (17) is sealed with the lower inner wall of the lower switch seat (14), the lower pin (19) penetrates through the lower slot (22-2) and is inserted into the lower track (21-2), the lower pin seat (20) sleeves the lower pin (19), the upper part of the lower pin seat (20) is connected with the lower part of the lower switch (17), and the lower pin (19) axially moves along with the lower pin seat (20), the lower spring (23) is sleeved on the lower inner pipe (22), the upper end of the lower spring (23) is in contact with the lower end face of the lower pin seat (20), the upper part of the lower joint (24) is connected with the lower part of the lower inner pipe (22), when water is injected into the lower spring, hydraulic pressure is injected into the packer (12) through the through hole on the connecting pipe (13) to expand the rubber sleeve of the packer (12), the injected water can flow from the upper inner open groove (4-2), the upper outer open groove (3-2) and the upper switch (9) and is pushed to flow out, the upper pin (6) moves upwards in the upper rail (4-1), when the water is stopped to be injected into the lower spring, the upper spring (3) pushes the upper pin seat (5) and the upper switch (9) to move downwards, the upper pin seat (5) drives the upper pin (6) to move downwards, the upper switch pipe (4), the connecting pipe (13) and the lower switch (4-1) are operated under the action of the upper, The lower switch tube (21) rotates to enable the upper inner open groove (4-2) to be not communicated with the upper outer open groove (3-2) and enable the lower outer open groove (22-1) to be communicated with the lower inner open groove (21-1).

2. The immobile pipe column layer-changing water injection device as claimed in claim 1, which is characterized in that: the difference between the lower inner open groove (21-1) and the upper inner open groove (4-2) on the circumference is 90 ︒, the two upper inner open grooves (4-2) are symmetrically arranged, the two lower inner open grooves (21-1) are symmetrically arranged, the two upper outer open grooves (3-2) are symmetrically arranged, and the two lower outer open grooves (22-1) are symmetrically arranged.

3. The immobile pipe column layer-changing water injection device as claimed in claim 1, which is characterized in that: the two long tracks of the upper track (4-1) are symmetrically arranged, the long track of the upper track (4-1) is upwards opened, the lower parts of the upper track (4-1) are communicated, the two long tracks of the lower track (21-2) are symmetrically arranged, the long track of the lower track (21-2) is downwards opened, the upper parts of the lower track (21-2) are communicated, and the difference between the circumferences of the upper track (4-1) and the lower track (21-2) is 90 ︒.

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