CN212563158U - Electric packer for oil well - Google Patents

Abstract

The utility model discloses an electronic packer for oil well, include: the device comprises an electric seat sealing assembly, an electric unsealing assembly, an upper protective pipe, an inner pipe assembly, a rubber cylinder, a mechanical unsealing seat and a pressure relief oil plug; the electric seat seal assembly is positioned in the upper protective pipe; the electric deblocking component is fixedly arranged on the inner pipe component; the upper protective tube is positioned in the external sleeve; the mechanical deblocking base is sleeved on the inner pipe assembly; the inner pipe assembly is fixedly connected with the rubber barrel, and an oil drainage channel and an oil plug through hole are formed in the inner pipe assembly. The utility model discloses a lift oil pipe and drive the pillar rebound, then go up the pillar and drive mechanical deblocking seat rebound to realize the draining deblocking of packing element, can accomplish the deblocking through the mode of mechanical deblocking under the circumstances that electronic deblocking became invalid, solved because the problem of unable deblocking of electronic deblocking subassembly trouble or circuit trouble, make the oil well operation can normally go on, further improved the security of oil well operation, the utility model discloses simple structure, the simple operation.

Description

Electric packer for oil well

Technical Field

The utility model belongs to the technical field of the oil and gas is surveyed, concretely relates to electronic packer for oil well.

Background

At present, the expanding packer that the oil field generally used, electronic packer realize through the motor that setting and deblocking are as one of packer, and the operation is very convenient, has improved oil well operation's work efficiency. The electric packer drives a pressurizing pump to work by a motor, and the pressurizing pump pressurizes a seat sealing rubber cylinder from the oil absorption in an oil bag to the rubber cylinder; when the deblocking, rely on another pressure release motor to drive the lead screw and open the relief valve, realize electronic pressure release deblocking. However, both the seated motor and the pressure relief motor use electric energy, and when a circuit fault or a motor fault occurs, the pressure relief motor cannot provide pressure relief torque, and electric deblocking cannot be performed, so that the packer is stuck in a well, and normal operation of an oil well is influenced; at the moment, the deblocking can be carried out only by lifting the oil pipe or destroying the packer, so that the damage to the oil pipe at the horizontal section is easily caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems existing in the prior art, the utility model provides an electronic packer for oil well. The to-be-solved technical problem of the utility model is realized through following technical scheme:

an electrically powered packer for an oil well, comprising: the device comprises an electric seat sealing assembly, an electric unsealing assembly, an upper protective pipe, an inner pipe assembly, a rubber cylinder, a mechanical unsealing seat and a pressure relief oil plug;

the electric seat sealing assembly is positioned in the upper protective pipe and is fixedly connected with the inner pipe assembly, and the electric seat sealing assembly is communicated with the rubber cylinder through a seat sealing channel of the inner pipe assembly;

the electric deblocking assembly is fixedly arranged on the inner pipe assembly, and a pressure release valve of the electric deblocking assembly is connected with the rubber cylinder;

the upper protective pipe is positioned in the external sleeve, the upper end of the upper protective pipe is fixedly connected with an external oil pipe, the lower end of the upper protective pipe is fixedly connected with the mechanical deblocking base, and the upper protective pipe can move upwards under the driving of the oil pipe;

the mechanical unsealing seat is sleeved on the inner pipe assembly and is fixedly connected with the inner pipe assembly through a shear pin assembly, an accommodating groove is formed in the inner wall of the mechanical unsealing seat, the mechanical unsealing seat can overcome the connection acting force of the shear pin assembly under the driving of the upper protective pipe and slides upwards relative to the inner pipe assembly, so that the accommodating groove is located on one side, close to the mechanical unsealing seat, of the pressure relief oil plug;

the inner pipe assembly is fixedly connected with the rubber barrel, and an oil drainage channel and an oil plug through hole are formed in the inner pipe assembly; the oil drainage channel is communicated with the oil bag of the electric seat seal assembly;

the oil plug through hole is axially vertical to the upper protection pipe, the hole wall of the oil plug through hole is communicated with the oil drainage channel, and the oil plug through hole can be communicated with the seat seal channel;

the pressure relief oil plug is located in the oil plug through hole, one end of the pressure relief oil plug abuts against and is right to the mechanical unsealing seat, the oil plug through hole is sealed, the other end of the pressure relief oil plug faces towards the inside of the seat seal channel and can be right to the sealing of the oil plug through hole or the unsealing of the oil plug through hole, one end of the pressure relief oil plug can be jacked into the accommodating groove, and therefore the oil drainage channel is communicated with the seat seal channel through hole.

In an embodiment of the present invention, the oil plug through hole includes a first through hole and a second through hole;

the minimum diameter of the first through hole is larger than the maximum diameter of the second through hole, and one end, close to the seat seal channel, of the pressure relief oil plug can seal the second through hole through a first sealing element;

the first through hole is close to the mechanical unsealing seat, and the hole wall is communicated with the oil drainage channel;

one end, close to the mechanical unsealing seat, of the pressure relief oil plug seals the first through hole through a second sealing element;

the maximum diameter of the pressure relief oil plug is smaller than the minimum diameter of the first through hole.

In an embodiment of the present invention, the present invention further includes: a limit retainer ring;

the limiting check ring is sleeved on the inner pipe assembly, is fixedly connected with the inner pipe assembly and is positioned above the mechanical unsealing seat.

In an embodiment of the present invention, the mechanical deblocking base is sealed with the inner pipe assembly by a third sealing assembly and a fourth sealing assembly;

the third sealing assembly and the fourth sealing assembly are sleeved on the outer wall of the inner pipe assembly, and are located on two sides of the pressure relief oil plug.

In an embodiment of the present invention, the shear pin assembly includes a first shear pin and a second shear pin;

the first shear pin and the second shear pin are symmetrically arranged.

In an embodiment of the present invention, the mechanical unsealing seat includes: the first unsealing sleeve and the second unsealing sleeve are fixedly connected with the first unsealing sleeve;

the first unsealing sleeve and the second unsealing sleeve are sleeved on the inner pipe assembly;

the upper end part of the first decapping sleeve is inserted into the lower end part of the upper protection pipe;

a first boss is arranged on the inner wall of the first deblocking sleeve close to the upper end;

the upper end part of the second decapsulation sleeve is inserted into the lower end part of the first decapsulation sleeve, and the accommodating groove is formed between the upper end of the second decapsulation sleeve and the first boss;

the shear pin assembly is located proximate to the lower end of the second decapping sleeve;

the limiting check ring is positioned above the first unpacking sleeve;

the third seal assembly is located between the first boss and the inner tube assembly.

In an embodiment of the present invention, a second boss is provided on an inner wall of the second deblocking sleeve near the upper end;

the fourth seal assembly is located between the second boss and the inner tube assembly.

The utility model has the advantages that:

the utility model discloses a lift oil pipe and drive the protective tube rebound, then go up the protective tube and drive mechanical deblocking seat rebound, and then make the partly of pressure release oil stopper remove sealedly, thereby fluid oil seat seal passageway in the packing element gets into the draining passageway, get into the oil bag at last, with the draining deblocking that realizes the packing element, can accomplish the deblocking through the mode of mechanical deblocking under the circumstances that electronic deblocking became invalid, the problem of unable deblocking because electronic deblocking subassembly trouble or circuit trouble has been solved, thereby avoid electronic packer card well and take place the construction accident, the security of oil well operation has been improved, make oil well operation can normally go on, the efficiency of oil well operation has further been improved. The utility model discloses simple structure, the simple operation.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a block diagram of a prior art electric packer construction;

FIG. 2 is a schematic diagram of a portion of an electric packer for an oil well according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a part of the structure of the setting state of an electric packer for an oil well, which is provided by the embodiment of the invention;

FIG. 4 is a schematic structural diagram of a mechanical unset state part of an electric packer for an oil well according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a structure of an oil plug through hole of an electric packer for an oil well, provided by an embodiment of the invention;

fig. 6 is a schematic structural diagram of an oil plug through hole and a pressure relief oil plug in a mechanical unset state of an electric packer for an oil well according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of an oil plug through hole and a pressure relief oil plug in another mechanical unset state of an electric packer for an oil well according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a part of an electric packer for an oil well, which is provided by the embodiment of the invention.

Description of reference numerals: 1-an electric seating assembly; 2-an electric deblocking component; 3, mounting a protective pipe; 4-an inner tube assembly; 5-a rubber cylinder; 6-setting the channel; 7-oil sac; 8-a pressure relief valve; 9-seating a motor; 10-a pressurizing pump; 11-a one-way valve; 12-a pressure sensor; 13-a pressure relief motor; 14-oil liquid; 15-mechanical unsealing seat; 16-pressure relief oil plug; 17-a shear pin assembly; 18-an oil drainage channel; 19-oil plug through hole; 20-a cannula; 21-a receiving recess; 22-a first via; 23-a second via; 24-a first seal; 25-a second seal; 26-a sealing section; 27-end stage; 28-limit retainer ring; 29-a third seal assembly; 30-a fourth seal assembly; 31-a first shear pin; 32-a second shear pin; 33-first decapsulation; 34-second decapsulation; 35-a first boss; 36-second boss.

Detailed Description

The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.

Example one

Referring to fig. 2, 3 and 4, an electric packer for an oil well includes: the sealing device comprises an electric sealing component 1, an electric unsealing component 2, an upper protective pipe 3, an inner pipe component 4, a rubber cylinder 5, a mechanical unsealing seat 15 and a pressure relief oil plug 16. Electronic seat seals subassembly 1 and is located pillar 3, electronic seat seals subassembly 1 and inner tube subassembly 4 fixed connection, and electronic seat seals subassembly 1 and communicates with packing element 5 through the seat passageway 6 of inner tube subassembly 4. The seat seal passage 6 is a passage for injecting oil into the rubber cylinder 5 by the electric seat seal assembly 1, and the oil in the oil bag 7 can enter the rubber cylinder 5 through the seat seal passage 6. The electric unsealing assembly 2 (not shown in fig. 2-4) is fixedly arranged on the inner pipe assembly 4, and the pressure relief valve 8 (not shown in fig. 2-4) of the electric unsealing assembly 2 is connected with the rubber cylinder 5. The related structures of the electric setting assembly 1 and the electric deblocking assembly 2 and the processes of electric setting and electric deblocking of the present embodiment are the same as those of the related art.

In the prior art, as shown in fig. 1, the structure and the working process of the electric setting and unsetting assembly 1 and the electric unsetting assembly 2 are the prior art, and the electric setting and unsetting assembly 1 includes: the oil-gas well packer comprises a seat sealing motor 9, a pressurizing pump 10, a one-way valve 11, a pressure sensor 12 and the like, wherein an output shaft of the seat sealing motor 9 can be connected with the pressurizing pump 10 through a coupler, in a seat sealing stage, an electric packer is lowered to a horizontal well section, then the seat sealing motor 9 is electrified, the seat sealing motor 9 rotates to drive the pressurizing pump 10 to rotate, the pressurizing pump 10 absorbs oil from an oil bag 7, and oil is pumped into a rubber barrel 5 through the one-way valve 11; along with the fluid constantly increases in packing element 5, results in packing element 5 constantly to expand, until packing element 5 pastes on the outside 20 inner walls of sleeve pipe, and packing element 5 internal pressure sensor 12 detects when 5 internal pressure of packing element reach preset pressure value, and seat seals motor 9 stop work, and the seat seals and accomplishes. The electric unsealing assembly 2 comprises: pressure release motor 13, lead screw, relief valve 8 etc. during electronic deblocking, pressure release motor 13 drives the lead screw and opens relief valve 8, and fluid 14 in the packing element 5 flows to oil bag 7 through electronic pressure release passageway in, realizes electronic pressure release. The specific structure and the specific operation process of the electric setting assembly 1 and the electric unsetting assembly 2 are the prior art, and are not described herein again.

In this embodiment, the upper protection tube 3 is located in the external casing 20, the upper end of the upper protection tube 3 is fixedly connected to the external oil pipe, and the lower end of the upper protection tube 3 is fixedly connected to the mechanical unsealing seat 15. The mechanical unsealing seat 15 is sleeved on the inner pipe assembly 4, the shear pin assembly 17 penetrates through the mechanical unsealing seat 15 and the inner pipe assembly 4 to fixedly connect the mechanical unsealing seat 15 and the inner pipe assembly 4 together, and an accommodating groove 21 is formed in the inner wall of the mechanical unsealing seat 15. The inner pipe assembly 4 is fixedly connected with the rubber cylinder 5, and an oil drainage channel 18 and an oil plug through hole 19 are arranged on the inner pipe assembly 4. The axial direction of the oil plug through hole 19 is vertical to the axial direction of the upper protection pipe 3, the hole wall of the oil plug through hole 19 is communicated with the oil drainage channel 18, and the oil plug through hole 19 can be communicated with the seat sealing channel 6. That is, the seat seal passage 6 and the drain passage 18 may communicate through the oil plug through hole 19. The oil drainage passage 18 communicates with the oil pocket 7 of the electric setting assembly 1. The pressure relief oil plug 16 is positioned in the oil plug through hole 19, one end of the pressure relief oil plug 16 abuts against the mechanical seal releasing seat 15 and forms a sealing state with the oil plug through hole 19, and the other end of the pressure relief oil plug 16 extends towards the inside of the seat seal channel 6 and can form sealing or releasing sealing with the oil plug through hole 19. The other end of the pressure relief oil plug 16 is close to the seat seal channel 6 and can form a seal with the oil plug through hole 19 to seal the oil plug through hole 19, at the moment, the oil drainage channel 18 is not communicated with the seat seal channel 6, after the pressure relief oil plug 16 enters the accommodating groove 21, the other end of the pressure relief oil plug 16 is unsealed from the oil plug through hole 19, and then the oil drainage channel 18 and the seat seal channel 6 can be communicated through the oil plug through hole 19. One end of the pressure relief oil plug 16 can be sealed with the oil plug through hole 19, so that when the oil drainage channel 18 is communicated with the seat seal channel 6, oil cannot enter other elements from the oil plug through hole 19. When the mechanical unsealing seat 15 is not moved upwards, that is, when the mechanical unsealing is not performed, the accommodating groove 21 is located below the pressure relief oil plug 16. In the embodiment, after the electric packer seat is sealed, the rubber sleeve 5 is in close contact with the external sleeve 20, the inner pipe assembly 4 is fixedly connected with the rubber sleeve 5, when mechanical unsealing is needed, an external oil pipe is lifted, the external oil pipe is fixedly connected with the upper protection pipe 3, the oil pipe drives the upper protection pipe 3 to move upwards, the upper protection pipe 3 drives the mechanical unsealing seat 15 to move upwards, at the moment, the mechanical unsealing seat 15 has a trend of moving upwards due to the action of the shear pin assembly 17, when the lifting force is increased to an external force threshold value, the mechanical unsealing seat 15 can overcome the connecting acting force of the shear pin assembly 17, the inner pipe assembly 4 and the rubber sleeve 5 slide upwards along with the outer protection pipe, and the accommodating groove 21 moves to the pressure relief oil plug 16 in the sliding process; after the packing element 5 is seated, the pressure in the packing element 5 and the pressure in the seating channel 6 are larger than the pressure outside the electric packer, and the pressure relief oil plug 16 is pushed into the accommodating groove 21 under the action of the oil pressure in the seating channel 6, so that one end, close to the seating channel 6, of the pressure relief oil plug 16 is unsealed from the oil plug through hole 19, the oil drainage channel 18 is communicated with the seating channel 6 through the oil plug through hole 19, and under the action of the pressure inside the packing element 5, oil 14 in the packing element 5 sequentially passes through the seating channel 6, the oil plug through hole 19 and the oil drainage channel 18 to enter the oil sac 7, so that mechanical deblocking is realized. The utility model provides a because the problem of electronic deblocking subassembly trouble or circuit trouble and unable deblocking to avoid electronic packer card well and take place the construction accident, improved the security of oil well operation, make the oil well operation can normally go on, further improved the efficiency of oil well operation. The utility model discloses simple structure, the simple operation, simultaneously, the mechanical deblocking function can used repeatedly after changing the shear pin.

In this embodiment, after the machinery deblocking, will go up pillar 3 and dismantle, then dismantle mechanical deblocking seat 15, fill in oil plug through-hole 19 with pressure release oil plug 16, change shear pin subassembly 17, can used repeatedly this device.

In a feasible realization mode, the oil plug through hole 19 is positioned at the lower end of the oil drainage channel 18, the upper end of the oil drainage channel 18 is communicated with the oil sac 7, and the lower end of the oil drainage channel 18 can be communicated with the seat seal channel 6 through the oil plug through hole 19. The oil drainage channel 18 and the electric pressure relief channel are two different channels.

Example two

Referring to fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the present embodiment is an improvement on the first embodiment. In the present embodiment, the oil plug through hole 19 includes a first through hole 22 and a second through hole 23. The minimum diameter of the first through hole 22 is larger than the maximum diameter of the second through hole 23, and one end of the pressure relief oil plug 16 close to the seat seal channel 6 can form a sealing state with the second through hole 23 through a first sealing member 24. The first through hole 22 is close to the mechanical unsealing seat 15, the hole wall of the first through hole 22 is communicated with the oil drainage channel 18, the first through hole 22 is communicated with the second through hole 23 and is coaxial with the second through hole 23, and the second through hole 23 is close to the seat sealing channel 6 and is far away from the mechanical unsealing seat 15; one end of the pressure relief oil plug 16 close to the mechanical unsealing seat 15 forms a sealing state with the first through hole 22 through a second sealing member 25. Wherein the first seal 24 and the second seal 25 include, but are not limited to, sealing rings. The first seal 24 and the second seal 25 are fitted over the pressure relief oil plug 16. The maximum diameter of the pressure relief oil plug 16 is smaller than the minimum diameter of the first through hole 22, specifically, the end of the pressure relief oil plug 16 close to the seat seal channel 6 forms a sealing state with the second through hole 23, so the maximum diameter of the end of the pressure relief oil plug 16 close to the seat seal channel 6 is smaller than the minimum diameter of the second through hole 23, when the end of the pressure relief oil plug 16 close to the mechanical unsealing seat 15 enters the accommodating groove 21, as shown in fig. 6, the portion of the pressure relief oil plug 16 close to the end of the seat seal channel 6 and the first sealing member 24 are located in the first through hole 22, the maximum diameter of the end of the pressure relief oil plug 16 close to the seat seal channel 6 is smaller than the minimum diameter of the second through hole 23, and the maximum diameter of the second through hole 23 is smaller than the minimum diameter of the first through hole 22, therefore, a gap is formed between the portion of the end of the pressure relief oil plug 16 close to the seat seal channel 6 except for installing the first, one end of the pressure relief oil plug 16, which is close to the seat seal channel 6, is unsealed from the second through hole 23, and at the moment, the seat seal channel 6 is communicated with the first through hole 22 through the second through hole 23 and further communicated with the oil drainage channel 18.

In a feasible implementation manner, when one end of the pressure relief oil plug 16 close to the mechanical unsealing seat 15 enters the accommodating groove 21, the whole of one end of the pressure relief oil plug 16 close to the seat seal channel 6 and the first sealing element 24 are located in the first through hole 22, and the maximum diameter of one end of the pressure relief oil plug 16 close to the seat seal channel 6 is smaller than the minimum diameter of the second through hole 23, so that one end of the pressure relief oil plug 16 close to the seat seal channel 6 is unsealed from the second through hole 23, at this time, the seat seal channel 6 is communicated with the first through hole 22 through the second through hole 23, and further communicated with the oil drainage channel 18.

It will be appreciated that the displacement of the pressure relief oil plug 16 is such that the first seal 24 is displaced into the first through hole 22, i.e. the minimum depth of the receiving recess 21 is equal to the distance over which the first seal 24 is displaced from the second through hole 23 into the first through hole 22. One end of the pressure relief oil plug 16 close to the mechanical unsealing seat 15 and the first through hole 22 are always kept in a sealing state.

In a possible implementation manner, as shown in fig. 7, one end of the pressure relief oil plug 16 close to the seat seal passage 6 includes a sealing section 26 and a tail section 27, the sealing section 26 is fixedly connected with one end of the pressure relief oil plug 16 close to the mechanical unsealing seat 15, the tail section 27 is fixedly connected with the sealing section 26, and the maximum diameter of the tail section 27 is smaller than the minimum diameter of the sealing section 26, so that a larger gap is formed between the outer wall of the tail section 27 and the second through hole 23, the flow rate of the oil is increased, so that the oil in the seat seal passage 6 can rapidly flow into the oil drain passage 18, and the mechanical unsealing efficiency is improved.

Further, as shown in fig. 3 and 4, the electric packer for oil well further includes: a limit stop 28. The limiting check ring 28 is sleeved on the inner pipe assembly 4, and the limiting check ring 28 is fixedly connected with the inner pipe assembly 4 and is positioned above the mechanical unsealing seat 15. The limiting check ring 28 has a limiting effect on the upward movement of the mechanical unsealing seat 15, when the oil pipe is lifted for a certain distance, the upward movement of the mechanical unsealing seat 15 is limited by the limiting check ring 28, the mechanical unsealing seat 15 moves in place, the damage to a packer caused by the overlarge movement stroke of the mechanical unsealing seat 15 due to the fact that the oil pipe is excessively lifted is prevented, and the reliability of the structure is enhanced.

In one possible implementation, the position limiting stop 28 may be two semicircular stop rings, which are sleeved on the inner tube assembly 4 when the position limiting stop 28 is installed, and then the two semicircular stop rings are connected together by bolts.

Further, as shown in fig. 3 and 4, the mechanical unsealing seat 15 is sealed from the inner tube assembly 4 by a third seal assembly 29 and a fourth seal assembly 30. The third sealing component 29 and the fourth sealing component 30 are sleeved on the outer wall of the inner pipe component 4, and the third sealing component 29 and the fourth sealing component 30 are located on two sides of the pressure relief oil plug 16. Wherein the third seal assembly 29 comprises at least one seal ring; the fourth seal assembly 30 includes at least one seal ring. In fig. 3 and 4, the third seal assembly 29 comprises two seal rings and the fourth seal assembly 30 comprises two seal rings.

Further, as shown in fig. 8, shear pin assembly 17 includes a first shear pin 31 and a second shear pin 32. First shear pin 31 and second shear pin 32 are symmetrically arranged. The first shear pin 31 and the second shear pin 32 which are symmetrically arranged enable the mechanical unsealing seat 15 to be stressed evenly.

Further, as shown in fig. 2 to 8, the mechanical unsealing seat 15 includes: a first decapsulation sleeve 33 and a second decapsulation sleeve 34 fixedly connected to the first decapsulation sleeve 33. The first and second deincapsules 33 and 34 are hollow bodies, and both the first and second deincapsules 33 and 34 are sleeved on the inner tube assembly 4. The upper end of the first decapping sleeve 33 is inserted into the lower end of the upper protection tube 3, and the first decapping sleeve 33 is fixedly connected to the upper protection tube 3. The inner wall of the first decapsulation sleeve 33 close to the upper end is provided with a first boss 35, and the first boss 35 protrudes radially. The upper end of the second decapsulation sleeve 34 is inserted into the lower end of the first decapsulation sleeve 33, the shear pin assembly 17 is located near the lower end of the second decapsulation sleeve 34, and the shear pin assembly 17 fixes the second decapsulation sleeve 34 to the inner tube assembly 4. When the mechanical unsealing is performed, the second unsealing sleeve 34 may be in sliding contact with the inner tube assembly 4, the first unsealing sleeve 33 and the second unsealing sleeve 34 are fixedly connected, and a certain distance is provided between the upper end of the second unsealing sleeve 34 and the first boss 35 to form the receiving groove 21. A positive stop collar 28 is positioned above the first unsealing sleeve 33 and a third seal assembly 29 is positioned between the first boss 35 and the inner tube assembly 4. In this embodiment, the mechanical unsealing seat 15 comprises two parts, namely a first unsealing cover 33 and a second unsealing cover 34, which facilitates assembly in production and subsequent maintenance. Meanwhile, the first boss 35 can reduce the distance between the first decapsulation sleeve 33 and the outer wall of the inner tube assembly 4, and the third sealing assembly 29 with a smaller thickness can be used to form a seal, so that the thickness of the first decapsulation sleeve 33 except the first boss 35 can be smaller, and the structure is more compact.

In a feasible implementation, go up pillar 3 and first big envelope 33 threaded connection of separating, first big envelope 33 of separating is separated big envelope 34 threaded connection with the second, after the mechanical deblocking, unscrew last pillar 3, pull down spacing retaining ring 28, then unscrew first big envelope 33 of separating, fill in oil plug through-hole 19 with pressure release oil plug 16 in, change first shear pin 31 and second shear pin 32, can carry out the mechanical deblocking next time needing the mechanical deblocking.

Further, as shown in fig. 8, a second boss 36 is provided on an inner wall of the second decapsulation sleeve 34 near the upper end, and the second boss 36 is radially protruded. The fourth seal assembly 30 is located between the second boss 36 and the inner tube assembly 4. The second bosses 36 reduce the distance between the second release liner 34 and the outer wall of the inner tube assembly 4, and a smaller fourth seal assembly 30 can be used to form a seal, so the thickness of the second release liner 34 except for the second bosses 36 can be smaller, making the structure more compact.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (7)

1. An electrically powered packer for an oil well, comprising: the device comprises an electric seat sealing assembly (1), an electric deblocking assembly, an upper protective pipe (3), an inner pipe assembly (4), a rubber cylinder (5), a mechanical deblocking seat (15) and a pressure relief oil plug (16);

the electric seat seal assembly (1) is positioned in the upper protective pipe (3) and is fixedly connected with the inner pipe assembly (4), and the electric seat seal assembly (1) is communicated with the rubber cylinder (5) through a seat seal channel (6) of the inner pipe assembly (4);

the electric deblocking assembly is fixedly arranged on the inner pipe assembly (4), and a pressure release valve (8) of the electric deblocking assembly is connected with the rubber cylinder (5);

the upper protective pipe (3) is positioned in the external sleeve (20), the upper end of the upper protective pipe is fixedly connected with an external oil pipe, the lower end of the upper protective pipe is fixedly connected with the mechanical unsealing seat (15), and the upper protective pipe (3) can move upwards under the driving of the oil pipe;

the mechanical unsealing seat (15) is sleeved on the inner pipe assembly (4) and is fixedly connected with the inner pipe assembly (4) through a shear pin assembly (17), an accommodating groove (21) is formed in the inner wall of the mechanical unsealing seat (15), the mechanical unsealing seat (15) can overcome the connecting acting force of the shear pin assembly (17) under the driving of the upper protective pipe (3) and slides upwards relative to the inner pipe assembly (4), so that the accommodating groove (21) is located on one side, close to the mechanical unsealing seat (15), of the pressure relief oil plug (16);

the inner pipe assembly (4) is fixedly connected with the rubber cylinder (5), and an oil drainage channel (18) and an oil plug through hole (19) are formed in the inner pipe assembly (4); the oil drainage channel (18) is communicated with an oil bag (7) of the electric seat seal assembly (1);

the oil plug through hole (19) is axially vertical to the upper protection pipe (3), the hole wall of the oil plug through hole (19) is communicated with the oil drainage channel (18), and the oil plug through hole (19) can be communicated with the seat sealing channel (6);

pressure release oil plug (16), be located in oil plug through-hole (19), one end with mechanical unsealing seat (15) offsets and right oil plug through-hole (19) are sealed, and the other end orientation extend in seat passageway (6) and can be right oil plug through-hole (19) are sealed or are relieved sealedly, the one end of pressure release oil plug (16) can be pushed up in holding recess (21), so that draining passageway (18) pass through oil plug through-hole (19) with seat passageway (6) intercommunication.

2. An electrically operated packer according to claim 1, characterised in that the oil plug through hole (19) comprises a first through hole (22) and a second through hole (23);

the minimum diameter of the first through hole (22) is larger than the maximum diameter of the second through hole (23), and one end, close to the seat sealing channel (6), of the pressure relief oil plug (16) can be sealed against the second through hole (23) through a first sealing element (24);

the first through hole (22) is close to the mechanical unsealing seat (15), and the hole wall is communicated with the oil drainage channel (18);

one end, close to the mechanical unsealing seat (15), of the pressure relief oil plug (16) is sealed for the first through hole (22) through a second sealing element (25);

the maximum diameter of the pressure relief oil plug (16) is smaller than the minimum diameter of the first through hole (22).

3. The electrically powered packer of claim 1 or 2, further comprising: a limit retainer ring (28);

and the limiting check ring (28) is sleeved on the inner pipe assembly (4), is fixedly connected with the inner pipe assembly (4), and is positioned above the mechanical unsealing seat (15).

4. An electrically operated packer according to claim 3, characterised in that the mechanical unseating seat (15) is sealed from the inner pipe assembly (4) by a third sealing assembly (29) and a fourth sealing assembly (30);

the third sealing assembly (29) and the fourth sealing assembly (30) are sleeved on the outer wall of the inner pipe assembly (4), and the third sealing assembly (29) and the fourth sealing assembly (30) are located on two sides of the pressure relief oil plug (16).

5. An electrically powered packer according to claim 4, characterised in that the shear pin assembly (17) comprises a first shear pin (31) and a second shear pin (32);

the first shear pin (31) and the second shear pin (32) are symmetrically arranged.

6. An electrically operated packer according to claim 5, characterised in that the mechanical unseating seat (15) comprises: a first decapsulation sleeve (33) and a second decapsulation sleeve (34) fixedly connected with the first decapsulation sleeve (33);

the first de-enveloping sleeve (33) and the second de-enveloping sleeve (34) are sleeved on the inner pipe assembly (4);

the upper end part of the first decapping sleeve (33) is inserted into the lower end part of the upper protection pipe (3);

a first boss (35) is arranged on the inner wall of the first decapsulation sleeve (33) close to the upper end;

the upper end of the second decapsulation sleeve (34) is inserted into the lower end of the first decapsulation sleeve (33), and the accommodating groove (21) is formed between the upper end of the second decapsulation sleeve (34) and the first boss (35);

the shear pin assembly (17) is located near the lower end of the second decapping sleeve (34);

the limiting check ring (28) is positioned above the first unpacking sleeve (33);

the third seal assembly (29) is located between the first boss (35) and the inner tube assembly (4).

7. The electrically driven packer as claimed in claim 6, characterized in that a second boss (36) is provided on the inner wall of the second unpacking sleeve (34) near the upper end;

the fourth seal assembly (30) is located between the second boss (36) and the inner tube assembly (4).

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