CN111502587A - Remotely opened stratum isolation tool for deep well - Google Patents
Remotely opened stratum isolation tool for deep well Download PDFInfo
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- CN111502587A CN111502587A CN202010296055.7A CN202010296055A CN111502587A CN 111502587 A CN111502587 A CN 111502587A CN 202010296055 A CN202010296055 A CN 202010296055A CN 111502587 A CN111502587 A CN 111502587A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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Abstract
The invention discloses a remotely opened stratum isolation tool for a deep well, which comprises an outer cylinder body, a first inner cylinder, a second inner cylinder, a third inner cylinder and a sealing mechanism, wherein the outer cylinder body is provided with a first opening and a second opening; hydraulic oil is filled in an annular space formed between the outer cylinder body and the part below the floating piston on the first inner cylinder and between the second inner cylinder and the third inner cylinder; the invention eliminates the influence of the depth of penetration on the performance of a stratum isolation tool, forms pressure difference between the inner cylinder and the annular space of the inner cylinder and the outer cylinder, forms the inner and outer pressure difference by pulse pressure in an oil pipe, enables a piston to reciprocate by the double action of the pressure difference and a return spring, simultaneously drives a support sleeve to generate upward unidirectional motion by two groups of locking rings, when the support sleeve moves to a set position, an upper locking claw loses the support of the support sleeve, and under the elastic force action of a strong spring, the upper locking claw is separated from a locking groove of the upper locking sleeve and pushes a left operating arm and a right operating arm to move downwards, and a sealing valve is opened.
Description
Technical Field
The invention belongs to the technical field of deep well development and completion of oil and gas fields, and relates to a remotely opened stratum isolation tool for a deep well.
Background
The stratum isolation tool mainly isolates an oil layer from a well hole in the development process of an oil-gas field, the oil layer can be prevented from being polluted by well completion fluid or slurry during the running-in period of a production pipe column and the well repairing period, the stratum isolation tool can realize bidirectional sealing and can also be used for temporary well abandoning, well killing operation is not needed during well repairing, a packer is not needed to be thrown and blocked, the stratum isolation tool can be used for pipe column pressure testing, underbalanced perforating, well control blocking operation, deep blowout prevention operation and multilayer isolation operation and can also be applied to a well with an electric pump, and stratum pollution is avoided during the replacement of the electric pump. The formation isolation tool can be opened or closed in a mechanical switch mode or opened in a remote pulse pressure pressing mode, the formation isolation tool with the remote opening function has great advantages particularly in batch drilling and batch well completion operation, and operation time and operation cost can be greatly saved.
The conventional stratum isolation tool is sealed by rubber or a molding material, when the well working condition contains gravels, foreign matters such as gravels or rock debris are often clamped between the sealing valve and a sealing valve seat when the sealing valve is opened or closed, so that the sealing failure caused by the scratch or tear on the sealing surface of the rubber or the molding material is caused, the overhaul or the abandonment can be seriously caused, the conventional stratum isolation tool cannot be applied to an ultra-deep well or a deep well due to the influence of the well depth, and the application range is limited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a remote-opening stratum isolation tool for a deep well.
The invention is realized by the following technical scheme:
a remotely opened stratum isolation tool for a deep well comprises an outer cylinder body, a first inner cylinder, a second inner cylinder, a third inner cylinder and a sealing mechanism; hydraulic oil is filled in an annular space formed between the outer cylinder and the first inner cylinder (the part below the upper floating piston), the second inner cylinder and the third inner cylinder;
the outer cylinder comprises an upper joint, an upper outer cylinder, a balance outer cylinder, a locking outer cylinder, a connecting cylinder, a spring outer cylinder, a lower connecting cylinder, a lower outer cylinder and a conversion joint which are sequentially connected end to end from top to bottom;
the first inner cylinder comprises an upper central tube, an upper floating piston, a reciprocating force transmission mechanism and a support sleeve;
a clamping ring is arranged in the middle of the upper central tube, a baffle ring is arranged in the balance outer tube, and the baffle ring acts on the clamping ring to limit the axial movement of the upper central tube; a pressure transfer hole is formed on the surface of the pipe body of the upper central pipe close to the upper end, and a filter sleeve is arranged outside the pressure transfer hole; an upper floating piston is arranged in an annular space formed between the upper outer cylinder and the upper central pipe; can reciprocate on the upper outer cylinder under the action of pulse pressure;
the reciprocating force transmission mechanism comprises a reset spring, a piston, an upper lock ring and a lower lock ring, the piston is sleeved on an upper central tube, the reset spring is arranged at the upper end of the piston, the upper lock ring is arranged at the lower end of the piston, the lower lock ring is arranged on a limit ring, the limit ring is arranged on the inner wall of the balance outer barrel, threads are formed on the inner surfaces of the upper lock ring and the lower lock ring, and the upper lock ring and the lower lock ring respectively realize one-way limit on the support sleeve in the opposite direction through the threads; (when the piston moves upwards along the upper central tube, the upper lock ring locks the support sleeve, the support sleeve moves upwards along with the piston, and the lower lock ring does not limit the upward movement of the support sleeve;
the supporting sleeve is sleeved on the upper central tube, the outer surface of the upper half part of the supporting sleeve is provided with threads, and the supporting sleeve is interacted with the upper locking ring and the lower locking ring through the threads, and the lower part of the supporting sleeve is positioned in the locking claw (at the initial position) to play a role of supporting the locking claw from the inside;
the second inner cylinder comprises an upper locking claw, a first inner connecting cylinder, a spring central tube and a push cylinder;
the lower end of the upper locking claw is connected with a first inner connecting cylinder, the lower end of the first inner connecting cylinder is connected with a spring central tube, the lower end of the spring central tube is connected with a pushing cylinder, and the lower end of the upper central tube extends into the first inner connecting cylinder;
an upper locking sleeve is arranged in the locking outer cylinder and plays a role of supporting an upper locking claw from the outside, and the locking claw is positioned between the supporting sleeve and the upper locking sleeve (at an initial position);
an upper spring shoulder protector and a lower spring shoulder protector are respectively formed at the upper end and the lower end of the spring central tube, a group of strong springs are arranged between the upper spring shoulder protector and the lower spring shoulder protector, and the strong springs are separated by a bearing ring;
the third inner cylinder comprises a switch cylinder, a lower central tube, a shearing mechanism and a lower locking claw;
the upper end of the switch cylinder extends into the push cylinder, the lower end of the switch cylinder is connected with the lower central tube, and the lower end of the lower central tube is connected with the operation cylinder;
the shearing mechanism is arranged on the cylinder wall at the upper end of the switch cylinder and comprises an upper buffering ring, a lower buffering ring, an upper limiting sleeve, a shearing ring and a lower limiting sleeve, one part of the shearing ring is embedded in the switch cylinder, the other part of the shearing ring is exposed out of the surface of the cylinder, the shearing sleeve is sleeved outside the shearing ring, the upper limiting sleeve and the lower limiting sleeve are arranged on two sides of the shearing sleeve, and the upper buffering ring and the lower buffering ring are arranged on one upward side of the upper limiting sleeve;
a lower locking sleeve is arranged in the lower connecting cylinder and plays a role of supporting a lower locking claw from the outside, and a lower locking claw is arranged on a cylinder body at the upper end of the switch cylinder;
the sealing mechanism comprises an operating cylinder, an upper ball seat, a sealing valve, an upper filter ring, a lower filter ring, a sealing valve seat, a support sleeve, a disc spring group and a lower floating piston;
the upper end of the operation barrel is connected with the lower central tube, the upper end of the upper ball seat is connected with the operation barrel, the sealing valve is arranged between the upper ball seat and the sealing valve seat, a support sleeve is arranged outside the sealing valve seat, a disc spring group is arranged between the sealing valve seat and the support sleeve, and a lower floating piston is arranged below the sealing valve seat.
In the above technical scheme, an upper oil injection hole is formed in the balance outer cylinder, an upper oil injection plug is arranged in the upper oil injection hole, a lower oil injection hole is formed in the lower connecting cylinder, and a lower oil injection plug is arranged in the lower oil injection hole.
In the technical scheme, the balance outer cylinder is provided with balance holes, and the balance holes are internally provided with the filter plugs.
In the technical scheme, the upper ends of the locking claws are provided with spaced grooves, and radial deformation can be generated within the range of the set force value.
In the technical scheme, the scraping ring is fixed at the upper end of the upper floating piston through a fixing pin.
In the technical scheme, the upper lock ring and the lower lock ring are provided with the grooves along the axial direction and can be radially expanded.
In the above technical solution, the surface of the lower lock ring is provided with a lock ring outer ring.
In the technical scheme, the plurality of groups of through holes uniformly distributed on the lower locking claw can generate radial deformation within the range of the set force value.
In the above technical scheme, an upper filtering ring and a lower filtering ring are arranged between the upper ball seat and the sealing valve.
In the technical scheme, a left operating arm and a right operating arm are arranged on two sides of the outer surface of the barrel body of the operating barrel, and an operating arm mounting hole and an operating arm limiting groove for mounting the left operating arm and the right operating arm and a supporting arm mounting groove for mounting a supporting arm are formed on two sides of the upper ball seat; the sealing valve is spherical, and an operating arm mounting groove and an operating arm guide groove for mounting the operating arm and a supporting arm mounting protrusion for mounting the supporting arm are formed on two sides of the sealing valve.
In the above technical solution, the matching part of the sealing valve and the sealing valve seat adopts a metal-to-metal sealing manner.
Compared with the prior art, the invention has the beneficial effects that:
1. the conventional stratum isolation tool with the remote opening function has a nitrogen sealing cavity, nitrogen with different volumes is injected according to the running depth of the stratum isolation tool, and the sealing valve is opened in a pressing mode in an oil pipe, but the nitrogen injection amount is influenced by various factors, such as temperature, the running depth, part machining precision and the like, and the nitrogen injection amount is limited due to the volume of the nitrogen sealing cavity. Because the working conditions in the oil-gas well are complex, the service life of the nitrogen sealing cavity is only about one year, and after nitrogen escapes, the remote opening function fails, so that the sealing valve cannot be opened, and huge economic loss is caused.
The invention eliminates the influence of the depth of penetration on the performance of a stratum isolation tool, forms pressure difference between the inner cylinder and the annular space of the inner cylinder and the outer cylinder, forms the inner and outer pressure difference by pulse pressure in an oil pipe, enables a piston to reciprocate by the double action of the pressure difference and a return spring, simultaneously drives a support sleeve to generate upward unidirectional motion by two groups of locking rings, when the support sleeve moves to a set position, an upper locking claw loses the support of the support sleeve, and under the elastic force action of a strong spring, the upper locking claw is separated from a locking groove of the upper locking sleeve and pushes a left operating arm and a right operating arm to move downwards, and a sealing valve is opened.
2. The seat matching parts of the sealing valve and the sealing valve adopt a metal-to-metal sealing mode, and compared with the conventional rubber sealing mode, the sealing valve has the advantages of wider application range, higher safety and longer service life.
3. The shearing ring can perform a shearing function when the sealing valve cannot be opened, release the compression force of the strong spring and ensure the safety and reliability of the disassembling tool.
4. The sealing valve has a bidirectional sealing function, and can prevent leakage and overflow.
5. The stratum isolation tool can be quickly lowered to a designed position through a drill rod, and slurry loss is greatly reduced.
Drawings
Fig. 1 is a schematic diagram (one) of the overall structure of a remotely opening formation isolation tool for deep wells.
Fig. 2 is a schematic diagram (two) of the overall structure of a remotely opening formation isolation tool for deep wells.
Fig. 3 is a schematic diagram (iii) of the overall structure of a remotely opening formation isolation tool for deep wells.
Fig. 4 is a schematic structural diagram of an appearance of a remotely opening formation isolation tool for a deep well.
Fig. 5 is the partial structure diagram of the reciprocating force-transferring mechanism.
Fig. 6 is the partial structure diagram of the reciprocating force-transferring mechanism.
FIG. 7 is a partial view of the lower pawl.
Fig. 8 is a schematic structural diagram (one) of the sealing mechanism.
Fig. 9 is a schematic structural view (ii) of the sealing mechanism.
Fig. 10 is a schematic structural view of the left operation arm (right operation arm).
Fig. 11 is a schematic view of the sealing valve structure.
Fig. 12 is a schematic view of a support arm structure.
Wherein: 1. an upper joint, 2, a filter sleeve, 3, a scraping ring, 4, an upper floating piston, 5, a baffle ring, 6, a snap ring, 7, an upper outer cylinder, 8, an upper oil filling plug, 9, an upper central tube, 10, a balance outer cylinder, 11, a reset spring, 12, a piston, 13, a balance hole, 14, an upper lock ring, 15, a limit ring, 16, a lower lock ring outer ring, 17, a lower lock ring, 18, a support sleeve, 19, a locking outer cylinder, 20, an upper lock sleeve, 21, an upper lock claw, 22, a connecting cylinder, 23, an inner connecting cylinder, 24, a spring outer cylinder, 25, an upper spring shoulder protector, 26, a strong spring, 27, a spring central tube, 28, a support ring, 29, a lower spring shoulder protector, 30, a push cylinder, 31, a switch cylinder, 32, an upper buffer ring, 33, a lower buffer ring, 34, an upper limit sleeve, 35, a shear ring, 36, a shear ring, 37, a lower limit sleeve, 39, a lower central tube, 40. the hydraulic oil cylinder comprises a lower locking claw, 41, a lower locking sleeve, 42, a lower oil injection plug, 43, a lower outer cylinder, 44, an anti-rotation pin, 45, a left operating arm, 46, a fixing pin, 47, a right operating arm, 48, an operating cylinder, 49, an upper ball seat, 50, an upper filter ring, 51, a lower filter ring, 52, a sealing valve, 53, a supporting arm, 54, a sealing valve seat, 55, a supporting sleeve, 56, a disc spring group, 57, a lower floating piston and 58, and a conversion joint;
45-1 parts of mounting holes and 45-2 parts of connecting columns;
49-1 operating arm mounting holes, 49-2 operating arm limiting grooves, 49-3 supporting arm mounting grooves, 49-4 upper positioning holes and 49-5 lower positioning holes;
52-1, sealing valve face, 52-2, operating arm installation groove, 52-3, operating arm guide groove and 52-4, supporting arm installation bulge;
53-1, support 53-2, support arm mounting hole.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Examples
The invention provides a remotely opened formation isolation tool for a deep well. In one example of the remotely opening formation isolation tool for a deep well according to the present invention, as shown in fig. 1 to 12, a high temperature and high pressure resistant formation isolation tool for a deep well is shown, which comprises: the hydraulic release mechanism, the actuating mechanism, the locking mechanism and the metal sealing mechanism.
A remotely opened stratum isolation tool for a deep well comprises an outer cylinder body, a first inner cylinder, a second inner cylinder, a third inner cylinder and a sealing mechanism; hydraulic oil is filled in an annular space formed between the outer cylinder and the first inner cylinder (the part below the upper floating piston 4), the second inner cylinder and the third inner cylinder;
the outer cylinder comprises an upper joint 1, an upper outer cylinder 7, a balance outer cylinder 10, a locking outer cylinder 19, a connecting cylinder 22, a spring outer cylinder 24, a lower connecting cylinder 38, a lower outer cylinder 43 and a conversion joint 58 which are sequentially connected end to end from top to bottom;
the first inner cylinder comprises an upper central tube 9, an upper floating piston 4, a reciprocating force transmission mechanism and a support sleeve 18;
a clamping ring 6 is arranged in the middle of the upper central tube 9, a baffle ring 5 is arranged in the balance outer tube 10, and the baffle ring 5 acts on the clamping ring 6 to limit the axial movement of the upper central tube 9; a pressure transfer hole is formed on the surface of the upper central tube 9, which is close to the upper end of the upper central tube, and a filter sleeve 2 is arranged outside the pressure transfer hole; an upper floating piston 4 is arranged in an annular space formed between the upper outer cylinder 7 and the upper central tube 9; can reciprocate on the upper outer cylinder 7 under the action of pulse pressure;
the reciprocating force transmission mechanism comprises a return spring 11, a piston 12, an upper locking ring 14 and a lower locking ring 17, wherein the piston 12 is sleeved on the upper central tube 9, the return spring 11 is arranged at the upper end of the piston 12, the upper locking ring 14 is arranged at the lower end of the piston 12, the lower locking ring 17 is arranged on a limiting ring 15, the limiting ring 15 is arranged on the inner wall of the balance outer cylinder 10, threads are formed on the inner surfaces of the upper locking ring 14 and the lower locking ring 17, and the upper locking ring 14 and the lower locking ring 17 respectively realize one-way limiting on the support sleeve 18 in the opposite direction through the threads; (when the piston 12 moves upwards along the upper central tube 9, the upper locking ring 14 locks the supporting sleeve 18, the supporting sleeve 18 moves upwards along with the piston 12, the lower locking ring 17 does not limit the upward movement of the supporting sleeve 18; when the piston 12 moves downwards under the action of the return spring 11, the lower locking ring 17 locks the supporting sleeve 18, and the upper locking ring 14 does not limit the downward movement of the supporting sleeve 18);
the supporting sleeve 18 is sleeved on the upper central tube 9, the outer surface of the upper half part of the supporting sleeve is provided with threads, and the supporting sleeve interacts with the upper locking ring 14 and the lower locking ring 17 through the threads, and the lower part of the supporting sleeve is positioned in the locking claws 21 (at the initial position) and plays a role of supporting the locking claws 21 from the inside;
the second inner cylinder comprises an upper locking claw 21, a first inner connecting cylinder 23, a spring central tube 27 and a push cylinder 30;
the lower end of the upper locking claw 21 is connected with a first inner connecting cylinder 23, the lower end of the first inner connecting cylinder 23 is connected with a spring central tube 27, the lower end of the spring central tube 27 is connected with a push cylinder 30, and the lower end of the upper central tube 9 extends into the first inner connecting cylinder 23;
an upper locking sleeve 20 is provided in the lock outer cylinder to function as an outer support for an upper locking pawl 21, the locking pawl 21 being located between the support sleeve 18 and the upper locking sleeve 20 (at an initial position);
an upper spring shoulder protector 25 and a lower spring shoulder protector 29 are respectively formed at the upper end and the lower end of the spring central tube 27, 2 groups of strong springs 26 are installed between the upper spring shoulder protector 25 and the lower spring shoulder protector 29, and the strong springs 26 are separated by a bearing ring 28;
the third inner cylinder comprises a switch cylinder 31, a lower central tube 39, a shearing mechanism and a lower locking claw 40;
the upper end of the switch cylinder 31 extends into the push cylinder 30, the lower end of the switch cylinder 31 is connected with a lower central tube 39, and the lower end of the lower central tube 39 is connected with an operation cylinder 48;
the shearing mechanism is arranged on the upper end cylinder wall of the switch cylinder 31 and comprises an upper buffering ring 32, a lower buffering ring 33, an upper limiting sleeve 34, a shearing sleeve 35, a shearing ring 36 and a lower limiting sleeve 37, one part of the shearing ring 36 is embedded in the cylinder of the switch cylinder 31, the other part of the shearing ring is exposed out of the surface of the cylinder, the shearing sleeve 35 is sleeved outside the shearing ring 36, the upper limiting sleeve 34 and the lower limiting sleeve 37 are arranged on two sides of the shearing sleeve 35, and the upper buffering ring 32 and the lower buffering ring 33 are arranged on one upward side of the upper limiting sleeve 34;
a lower locking sleeve 41 is arranged in the lower connecting cylinder 38 and plays a role of supporting a lower locking claw 40 from the outside, and a lower locking claw 40 is arranged on the cylinder body at the upper end of the switch cylinder 31;
the sealing mechanism comprises an operating cylinder 48, an upper ball seat 49, a sealing valve 52, an upper filter ring 50, a lower filter ring 51, a sealing valve seat 54, a support sleeve 55, a disc spring group 56 and a lower floating piston 57;
the upper end of the operating cylinder 48 is connected with the lower central tube 39, the upper end of the upper ball seat 49 is connected with the operating cylinder 48, the sealing valve 52 is arranged between the upper ball seat 49 and the sealing valve seat 54, a supporting sleeve 55 is arranged outside the sealing valve seat 54, a disc spring group 56 is arranged between the sealing valve seat 54 and the supporting sleeve 55, and a lower floating piston 57 is arranged below the sealing valve seat 54.
An upper oil injection hole is formed in the balance outer cylinder 10, an upper oil injection plug 8 is arranged in the upper oil injection hole, a lower oil injection hole is formed in the lower connecting cylinder, and a lower oil injection plug 42 is arranged in the lower oil injection hole.
The balance outer cylinder 10 is provided with balance holes, and filter plugs 13 are arranged in the balance holes.
The locking pawl 21 has spaced slots at its upper end for radial deformation within a set force range.
The scraping ring 3 is fixed at the upper end of the upper floating piston 4 through a fixing pin.
The upper locking ring 14 and the lower locking ring 17 are axially slotted and radially expandable.
The lower lock ring surface is provided with a lock ring outer ring 16.
The plurality of groups of through holes uniformly distributed on the lower locking claw 40 can generate radial deformation within the range of the set force value.
An upper filter ring 50 and a lower filter ring 51 are disposed between the upper ball seat 49 and the sealing valve 52.
A left operating arm 45 and a right operating arm 47 are arranged on two sides of the outer surface of the barrel body of the operating barrel 48, and an operating arm mounting hole 49-1 and an operating arm limiting groove 49-2 for mounting the left operating arm 45 and the right operating arm 47 and a supporting arm mounting groove 49-3 for mounting a supporting arm 53 are formed on two sides of the upper ball seat; the sealing valve 52 is spherical, and has an operating arm mounting groove 52-2 and an operating arm guide groove 52-3 formed on both sides thereof for mounting the operating arm 49, and a support arm mounting protrusion 52-4 for mounting the support arm 53.
The matching parts of the sealing valve 52 and the sealing valve seat 54 adopt a metal-to-metal sealing mode.
The invention is used in deep well completion operation, and when the formation isolation tool is operated, the formation isolation tool needs to be connected to a preset position of a production string. The on-off state of the sealing ball valve 52 of the formation isolation tool is set according to the operational characteristics when running a production string containing the formation isolation tool. In general, the formation isolation tool is in an open state when the well is run in, the formation isolation tool is closed by lifting the service string after relevant operations are completed, and the upper body string is continued to close the sealing valve 52 of the anti-lost tool when the service tool passes through the position of the switch cylinder 31 of the formation isolation tool, so that mud or completion fluid is isolated from the reservoir. When production is needed, the service tool is inserted back to the stratum isolation tool and pressed down, and the stratum isolation tool can be opened when the service tool passes through the switch cylinder 31 of the stratum isolation tool. When the production string needs to be replaced in a well repairing way, the stratum isolation tool can be closed by lifting the production string, and the upper completion fluid is isolated from the reservoir.
When stratum isolation instrument was equipped with long-range opening function, need open two oil filler points on losing the leak protection instrument before the instrument goes into the well and utilize equipment to pump hydraulic oil into the instrument annular space inside, seal the oil filler point after filling up. Because the stratum isolation tool needs to be intermittently grouted into an oil pipe when being in a closed state when being put in, the internal and external pressures of the stratum isolation tool are kept balanced, the stratum isolation tool can be used for installing a well head equipment rear setting packer when being put in to a designed depth, when needing to be produced, pulse pressure is beaten in a production pipe column, internal and external pressure difference is generated at the sealing surface of a piston 12 by utilizing a pressure difference structure of a hydraulic actuating mechanism, the piston 12 generates reciprocating motion under the double actions of the pressure difference and a reset spring 11, simultaneously an upper lock ring 14 drives a support sleeve 18 to perform one-way motion, the piston 12 moves downwards under the action of the reset spring 11 when releasing pressure, due to the design of a double lock ring 14 at the outer end of the support, the lower lock ring 14 locks the support sleeve 18 to prevent the support sleeve 18 from moving downwards, the piston 12 drives the upper lock ring 14 to move downwards along the support sleeve 18, the upper locking claw 21 loses the support of the support sleeve 18, and pushes the left and right operating arms 45 and 47 to move downward under the elastic force of the strong spring 26, thereby opening the sealing valve.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. A remotely opened formation isolation tool for a deep well, comprising: comprises an outer cylinder body, a first inner cylinder, a second inner cylinder, a third inner cylinder and a sealing mechanism; hydraulic oil is filled in an annular space formed between the outer cylinder body and the part below the floating piston on the first inner cylinder and between the second inner cylinder and the third inner cylinder;
the outer cylinder comprises an upper joint, an upper outer cylinder, a balance outer cylinder, a locking outer cylinder, a connecting cylinder, a spring outer cylinder, a lower connecting cylinder, a lower outer cylinder and a conversion joint which are sequentially connected end to end from top to bottom;
the first inner cylinder comprises an upper central tube, an upper floating piston, a reciprocating force transmission mechanism and a support sleeve; a clamping ring is arranged in the middle of the upper central tube, a baffle ring is arranged in the balance outer tube, and the baffle ring acts on the clamping ring to limit the axial movement of the upper central tube; a pressure transfer hole is formed on the surface of the pipe body of the upper central pipe close to the upper end, and a filter sleeve is arranged outside the pressure transfer hole; an upper floating piston is arranged in an annular space formed between the upper outer cylinder and the upper central pipe; can reciprocate on the upper outer cylinder under the action of pulse pressure; the reciprocating force transmission mechanism comprises a reset spring, a piston, an upper lock ring and a lower lock ring, the piston is sleeved on an upper central tube, the reset spring is arranged at the upper end of the piston, the upper lock ring is arranged at the lower end of the piston, the lower lock ring is arranged on a limit ring, the limit ring is arranged on the inner wall of the balance outer barrel, threads are formed on the inner surfaces of the upper lock ring and the lower lock ring, and the upper lock ring and the lower lock ring respectively realize one-way limit on the support sleeve in the opposite direction through the threads; the support sleeve is sleeved on the upper central pipe, threads are formed on the outer surface of the upper half part of the support sleeve, and the support sleeve interacts with the upper locking ring and the lower locking ring through the threads;
the second inner cylinder comprises an upper locking claw, a first inner connecting cylinder, a spring central tube and a push cylinder; the lower end of the upper locking claw is connected with a first inner connecting cylinder, the lower end of the first inner connecting cylinder is connected with a spring central tube, the lower end of the spring central tube is connected with a pushing cylinder, and the lower end of the upper central tube extends into the first inner connecting cylinder; an upper locking sleeve is arranged in the locking outer cylinder; an upper spring shoulder protector and a lower spring shoulder protector are respectively formed at the upper end and the lower end of the spring central tube, a group of strong springs are arranged between the upper spring shoulder protector and the lower spring shoulder protector, and the strong springs are separated by a bearing ring;
the third inner cylinder comprises a switch cylinder, a lower central tube, a shearing mechanism and a lower locking claw; the upper end of the switch cylinder extends into the push cylinder, the lower end of the switch cylinder is connected with the lower central tube, and the lower end of the lower central tube is connected with the operation cylinder; the shearing mechanism is arranged on the cylinder wall at the upper end of the switch cylinder and comprises an upper buffering ring, a lower buffering ring, an upper limiting sleeve, a shearing ring and a lower limiting sleeve, one part of the shearing ring is embedded in the switch cylinder, the other part of the shearing ring is exposed out of the surface of the cylinder, the shearing sleeve is sleeved outside the shearing ring, the upper limiting sleeve and the lower limiting sleeve are arranged on two sides of the shearing sleeve, and the upper buffering ring and the lower buffering ring are arranged on one upward side of the upper limiting sleeve; a lower locking sleeve is arranged in the lower connecting cylinder and plays a role of supporting a lower locking claw from the outside, and a lower locking claw is arranged on a cylinder body at the upper end of the switch cylinder;
the sealing mechanism comprises an operating cylinder, an upper ball seat, a sealing valve, an upper filter ring, a lower filter ring, a sealing valve seat, a support sleeve, a disc spring group and a lower floating piston; the upper end of the operation barrel is connected with the lower central tube, the upper end of the upper ball seat is connected with the operation barrel, the sealing valve is arranged between the upper ball seat and the sealing valve seat, a support sleeve is arranged outside the sealing valve seat, a disc spring group is arranged between the sealing valve seat and the support sleeve, and a lower floating piston is arranged below the sealing valve seat.
2. A remote opening formation isolation tool for deep wells according to claim 1, wherein: an upper oil injection hole is formed in the balance outer cylinder, an upper oil injection plug is arranged in the upper oil injection hole, a lower oil injection hole is formed in the lower connecting cylinder, and a lower oil injection plug is arranged in the lower oil injection hole.
3. A remote opening formation isolation tool for deep wells according to claim 1, wherein: the balance outer barrel is provided with balance holes, and filter plugs are arranged in the balance holes.
4. A remote opening formation isolation tool for deep wells according to claim 1, wherein: the upper end of the locking claw is provided with spaced slots, and radial deformation can be generated within the range of the set force value; the plurality of groups of through holes uniformly distributed on the lower locking claw can generate radial deformation within the range of the set force value.
5. A remote opening formation isolation tool for deep wells according to claim 1, wherein: the scraping ring is fixed at the upper end of the upper floating piston through a fixing pin.
6. A remote opening formation isolation tool for deep wells according to claim 1, wherein: the upper lock ring and the lower lock ring are axially grooved and can be radially expanded.
7. A remote opening formation isolation tool for deep wells according to claim 1, wherein: and a lock ring outer ring is arranged on the surface of the lower lock ring.
8. A remote opening formation isolation tool for deep wells according to claim 1, wherein: an upper filtering ring and a lower filtering ring are arranged between the upper ball seat and the sealing valve.
9. A remote opening formation isolation tool for deep wells according to claim 1, wherein: a left operating arm and a right operating arm are arranged on two sides of the outer surface of the barrel body of the operating barrel, and an operating arm mounting hole and an operating arm limiting groove for mounting the left operating arm and the right operating arm and a supporting arm mounting groove for mounting a supporting arm are formed on two sides of the upper ball seat; the sealing valve is spherical, and an operating arm mounting groove and an operating arm guide groove for mounting the operating arm and a supporting arm mounting protrusion for mounting the supporting arm are formed on two sides of the sealing valve.
10. A remote opening formation isolation tool for deep wells according to claim 1, wherein: and the matching part of the sealing valve and the sealing valve seat adopts a metal-to-metal sealing mode.
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| CN202010296055.7A CN111502587B (en) | 2020-04-15 | 2020-04-15 | Remotely opened stratum isolation tool for deep well |
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| CN202010296055.7A CN111502587B (en) | 2020-04-15 | 2020-04-15 | Remotely opened stratum isolation tool for deep well |
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| CN111502587B (en) | 2021-12-17 |
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