CN113250648A - Soluble metal sealing card seat - Google Patents
Soluble metal sealing card seat Download PDFInfo
- Publication number
- CN113250648A CN113250648A CN202010082860.XA CN202010082860A CN113250648A CN 113250648 A CN113250648 A CN 113250648A CN 202010082860 A CN202010082860 A CN 202010082860A CN 113250648 A CN113250648 A CN 113250648A
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- China
- Prior art keywords
- slip
- cone
- gap
- seat
- soluble metal
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 114
- 239000002184 metal Substances 0.000 title claims abstract description 114
- 238000007789 sealing Methods 0.000 title claims abstract description 97
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 19
- 238000004873 anchoring Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000002131 composite material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 230000033558 biomineral tissue development Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
Images
Classifications
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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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
-
- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
-
- 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
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
- E21B33/1212—Packers; Plugs characterised by the construction of the sealing or packing means including a metal-to-metal seal element
-
- 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
Abstract
The invention discloses a soluble metal sealing card seat, comprising: the sealing structure comprises a cone, a metal sealing ring, a slip and a lower joint, wherein the cone, the metal sealing ring, the slip and the lower joint are all soluble metal components; the outer surface of the cone is a conical surface, and a channel which is axially arranged is arranged in the cone; the metal sealing ring is sleeved on the cone; the slip comprises a plurality of slip tooth grooves and a cylindrical slip seat, the slip seat is of an integrated structure, one end of the slip seat is provided with a plurality of toothed plates, a gap is reserved between every two adjacent toothed plates, slip teeth are arranged in the slip tooth grooves, the slip is sleeved on the cone, and one end of the slip abuts against one end, close to the cone top, of the metal sealing ring; the lower adapter abuts against one end, close to the cone bottom, of the cone, and one end, provided with the toothed plate, of the slip. The soluble metal sealing clamping seat has the advantages of simple structure, shortened length, convenience in processing and better sealing performance.
Description
Technical Field
The invention relates to the technical field of downhole tools in the petroleum and gas industry, in particular to a soluble metal sealing clamping seat.
Background
The soluble clamping seat is widely applied to plugging of deep gas wells, and guarantees are provided for successful implementation of process technologies such as upward return testing, fracturing modification and the like. As shown in fig. 1-2, the existing soluble card seat includes a cone 5 and a lower joint 1, a rubber cylinder 4 and a slip 2 are arranged between the cone 5 and the lower joint 1, and in order to meet the sealing requirement, a baffle ring 3 or a composite sheet is further required to be arranged between the rubber cylinder 4 and the slip 2, but in the specific construction, the following disadvantages of the existing soluble card seat are found:
(1) the existing soluble card seats mostly adopt a rubber cylinder 4 as a sealing component, and have the defects of large volume, high dissolution condition, difficult complete dissolution and frequent blockage of a shaft in the later construction period, thereby influencing the oil production of an oil well; the rubber cylinder 4 has the flowing characteristic, and the sealing effect is not ideal;
(2) most cones 5 of the existing soluble clamping seats are soluble metal members, and due to the limitation of the diameter of a casing in a well and the pressure bearing capacity of the cones 5, the thicknesses of the cones 5 are relatively thick, and further, cylindrical channels with small apertures are arranged in the cones 5, for example, the diameters of the channels are 30-45 mm, and the diameters of the channels cannot be large, so that the backflow efficiency of fracturing fluid and impurities in the well is greatly influenced, and the yield increasing effect of oil and gas is further influenced;
(3) the conventional slip 2 with a soluble clamping seat comprises a slip seat 23 and slip teeth 24, wherein slip tooth grooves are formed in the outer surface of the slip seat 23, the slip teeth 24 are arranged in the slip tooth grooves, most of the slip seat 23 is formed by hooping a plurality of slip sheets 21, two adjacent slip sheets 21 are connected with each other, and a cutting seam 22 is preset, so that the structure is complex, the processing is difficult, and the slip sheets 21 are easily damaged in the process of going down a well, and the anchoring performance is influenced; except that, the slip seat 23 has the kerf 22 in the one end of packing element 4 butt joint, makes slips 2 transmit to the effort of packing element 4 is inhomogeneous, leads to packing element 4 to damage when the cassette is set.
Disclosure of Invention
The invention aims to overcome the defects of complex structure and difficult processing of the slips on the soluble clamping seat in the prior art; the slip sheets are easy to damage, and the anchoring performance of the slip is influenced; and the slips on the clamping seat easily cause the damage of the rubber cylinder; and the problems of complex structure, difficult processing and poor sealing performance of the clamping seat caused by the defects of large volume, difficult dissolution and poor sealing effect of the rubber cylinder are solved, and the soluble metal sealing clamping seat is provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
a soluble metal seal cartridge comprising: the sealing structure comprises a cone, a metal sealing ring, a slip and a lower joint, wherein the cone, the metal sealing ring, the slip and the lower joint are all soluble metal components; the outer surface of the cone is a conical surface, and a channel which is axially arranged is arranged in the cone;
the metal sealing ring is sleeved on the cone;
the slip comprises a plurality of slip tooth grooves and a cylindrical slip seat, the slip seat is of an integrated structure, one end of the slip seat is provided with a plurality of toothed plates, a gap is reserved between every two adjacent toothed plates, slip teeth are arranged in the slip tooth grooves, the slip is sleeved on the cone, and one end of the slip abuts against one end, close to the cone top, of the metal sealing ring;
the lower adapter abuts against one end, close to the cone bottom, of the cone, and one end, provided with the toothed plate, of the slip.
The cone, the lower joint, the slip and the metal sealing ring of the soluble metal sealing clamping seat are all made of soluble metal, such as: the aluminum alloy or the magnesium alloy is adopted, and the metal can be dissolved in liquid with corresponding mineralization degree. The invention adopts the metal sealing ring for sealing, solves the defects of large size and high dissolving condition of the rubber cylinder, has the advantages of good dissolving performance and difficult blockage of the shaft, has better sealing performance compared with the rubber cylinder, and ensures the successful implementation of the process technologies such as upward return test, fracturing reformation and the like. Furthermore, the slip of the invention adopts the slip seat with an integrated structure, the slip seat does not need to be assembled by a plurality of slip pieces, and a cutting seam is not needed to be arranged, so that the structure of the slip is greatly simplified, the slip has the advantages of simple structure and convenience for processing, and in the process of going into a well, the integrated slip seat is not easy to damage, and the bearing capacity and the anchoring performance of the slip are improved. Finally, only one end of the slip seat is provided with a toothed plate, gaps are formed among the toothed plates, when the slip seat climbs on the slope surface of the cone, one end of the slip seat, which is provided with the toothed plate, is used for abutting against the lower joint, and under the abutting force action of the lower joint, the toothed plate on the slip seat can be propped open towards the periphery but cannot be broken until the toothed plate is attached to the inner wall of the sleeve, and the slip teeth are clamped into the inner wall of the sleeve, so that the anchoring function is realized; the end, which is not provided with the toothed plate, is used for abutting against the metal sealing ring, the force-transferring end surface of the toothed plate is not provided with the gap, so that uniform acting force can be transferred to the metal sealing ring, and the metal sealing ring is prevented from being damaged due to nonuniform stress. The size of the slip tooth is matched with that of the corresponding slip tooth groove, and one part of the slip tooth is exposed out of the slip tooth groove and used for anchoring the slip and the sleeve. Because the slip seat adopted by the invention can uniformly transmit force to the metal sealing ring, a baffle ring or a composite sheet does not need to be arranged between the metal sealing ring and the slip, and the sealing can be realized after the baffle ring or the composite sheet is cancelled, so that the structure of the clamping seat is greatly simplified, the whole length of the clamping seat is shortened, the processing is very convenient, and the processing efficiency can be greatly improved. The soluble metal sealing clamping seat has the advantages of simple structure, shortened length, convenience in processing and better sealing performance.
Preferably, the clearance contains clearance bottom and clearance neck, the clearance bottom is the C-shaped groove, the clearance neck is the bar groove, the opening of clearance bottom with the clearance neck intercommunication, the clearance neck sets up and is being close to one side of lower clutch, the width of clearance neck is less than the width of clearance bottom.
The clearance bottom is the C-shaped groove, can avoid the slip seat atress is concentrated and is damaged, and the clearance neck is the bar groove, is convenient for opening of pinion rack guarantees the normal work of slips, and the processing of being convenient for.
Preferably, the width of the gap neck is 3-5mm, and the width of the gap bottom is 3-5 times of the width of the gap neck.
The slip seat uses the clearance of above-mentioned design value, and the clearance bottom can be better avoid the slip seat to concentrate because of the atress and destroy, and the pinion rack on the slip seat can be made things convenient for to the clearance neck simultaneously opens, and the slips of being convenient for is anchored in the inner wall of well casing pipe, and the processing of the clearance neck of being convenient for.
Preferably, the gap is arranged in the axial direction of the slip bowl.
And one end of the slip seat, which is provided with the gap, is stressed along the axis direction, so that the slip seat is prevented from being damaged.
Preferably, the metal seal ring is a metal member having an elongation of 16% to 35%.
The metal sealing ring is made of high-elongation metal, and the high-elongation metal refers to metal with the elongation of 16-35%. Because the invention adopts the high-elongation metal, the metal sealing ring can generate enough deformation, thereby realizing the sealing of the clamping seat.
Preferably, the metal member is a magnesium alloy member, or other soluble metal that can reach the elongation range, and the soluble metal refers to a metal that can be dissolved in a liquid with a corresponding degree of mineralization.
Preferably, the slip bowl and the metal sealing ring are integrally formed.
The slip and the sealing ring are designed into an integral structure, so that the structure of the clamping seat is simpler, and the processing is more convenient.
Preferably, the through hole inside the slip seat is a funnel-shaped structure, and a funnel pipe portion of the funnel-shaped structure is located at one end of the toothed plate.
The funnel tubular construction divide into funnel body part and funnel pipe part, the slip bowl does not be equipped with the one end of pinion rack is funnel body part, and its adaptation increases the biggest contact support surface area in the cone surface of cassette. And the size of the funnel pipe part is smaller, the thickness of the corresponding toothed plate is larger, and the pressure bearing capacity of one end of the slip seat, which is provided with the gap, is improved.
Preferably, the slip teeth are of a columnar structure, an included angle between the outer end faces of the slip teeth and the axis of the slip seat is 10-60 degrees, and the outer end faces of the slip teeth are back to the end, provided with the toothed plate, of the slip seat.
The outer end face is the face opposite to the groove bottom face of the slip tooth groove on the slip tooth, and the face and the axis of the slip seat form an inclined plane, so that the contact area between the slip tooth and the sleeve is reduced, the capability of the slip tooth to be extruded into the sleeve is enhanced, and the anchoring capability of the soluble integral slip is better.
Preferably, the slip seat comprises 6-12 toothed plates, and the toothed plates are uniformly provided with 2-3 slip tooth grooves.
Preferably, all the slip tooth grooves on each tooth plate are axially arranged along the slip bowl.
The number of the slip teeth can be changed according to the stress and the design requirement. Will the slips tooth socket evenly sets up on the pinion rack, promptly the slips tooth evenly sets up on the pinion rack, works as when the pinion rack atress opens, the better anchoring of slips tooth is gone into in the sleeve pipe, and the anchoring effect of slips is better.
Preferably, the gap is a U-shaped groove or an arc-shaped groove, and can also be a semicircular opening, and the like, so that the slip seat is prevented from being damaged due to concentrated stress.
Preferably, the slip teeth are ceramic or ceramic-metal components.
Preferably, the axis of the slip bowl and the axis of its internal through bore are coaxial.
When the slips is installed at the bottom of cone, make the slips along the central axis symmetry of cone, when the cassette setting, all slips teeth can contact with the sleeve simultaneously, and the atress simultaneously, anchoring effect is better.
Preferably, the channel is of a cylindrical structure, and the diameter of the channel is 70-80 mm; or the channel is in a circular truncated cone-shaped structure, and the diameter of the smallest end of the channel is 70-80 mm.
Through reducing the thickness with the cone to realize the channel size grow of cone, make the flowing back efficiency of impurity in fracturing fluid and the well and heighten the channel size of round platform form and be greater than cylindric channel size, it is better to flow back the effect.
Preferably, the metal sealing ring is provided with at least one circle of sealing ring, and the sealing ring is used for auxiliary sealing.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
(1) the soluble metal sealing clamping seat provided by the invention adopts the metal sealing ring for sealing, the defects of large size and high dissolving condition of the rubber cylinder are overcome, the metal sealing ring has the advantages of good dissolving performance and difficulty in blocking the shaft, the metal sealing ring has better sealing performance compared with the rubber cylinder, and the successful implementation of the process technologies such as upward return testing, fracturing reconstruction and the like is guaranteed.
(2) The slip of the soluble metal sealing clamping seat adopts the slip seat with an integrated structure, does not need to be assembled by a plurality of slip pieces, does not need to be provided with cutting seams, greatly simplifies the structure of the slip, has the advantages of simple structure and convenient processing, and the integrated slip seat is not easy to damage in the process of going down the well, thereby improving the bearing capacity and the anchoring performance of the slip.
(3) The end, which is abutted against the lower joint, of the slip seat adopted by the soluble metal sealing clamping seat is provided with the toothed plate, so that the slip seat can be conveniently opened under the action of the lower joint, the slip teeth on the slip seat are conveniently anchored on the inner wall of the sleeve, meanwhile, the end, which is not provided with the toothed plate, of the slip seat is abutted against the metal sealing ring, the force-transferring end surface of the slip seat is free of the gap, uniform acting force can be transferred to the metal sealing ring, and the metal sealing ring is prevented from being damaged due to nonuniform stress.
(4) The slip seat adopted by the soluble metal sealing clamping seat provided by the invention is abutted against one end of the metal sealing ring, so that acting force can be uniformly transmitted to the metal sealing ring, a baffle ring or a composite sheet is not required to be arranged between the metal sealing ring and the slip, sealing can be realized after the baffle ring or the composite sheet is cancelled, the structure of the clamping seat is greatly simplified, the whole clamping seat is shortened, the processing is very convenient, and the processing efficiency can be greatly improved.
(5) The size of the inner channel of the cone adopted by the soluble metal sealing clamping seat is far larger than the aperture of the through hole of the original cone, so that the back-flow efficiency of fracturing fluid and impurities in a well is improved.
Drawings
FIG. 1 is a schematic structural diagram of a conventional card socket;
FIG. 2 is a schematic diagram of a prior art slip;
labeled in FIGS. 1-2: 1-lower joint; 2-slips; 21-card tile; 22-cutting and cutting; 23-a slip bowl; 24-slip teeth; 3-a baffle ring; 4-a rubber cylinder; 5-cone.
Fig. 3 is a first structural schematic view of a soluble metal sealing cartridge in embodiment 1 of the present invention;
FIG. 4 is a cross-sectional view taken at A-A of FIG. 3;
FIG. 5 is a perspective view of a slip according to embodiment 1 of the present invention;
FIG. 6 is a schematic view of another perspective of the slip of embodiment 1 of the present invention;
FIG. 7 is a first schematic structural view of a slip bowl in embodiment 1 of the present invention;
FIG. 8 is a cross-sectional view taken at B-B of FIG. 7;
fig. 9 is a second schematic structural view of the soluble metal sealing cartridge in embodiment 1 of the present invention;
FIG. 10 is a second schematic structural view of a slip bowl in accordance with embodiment 1 of the present invention;
fig. 11 is a cross-sectional view at C-C in fig. 10.
Labeled in FIGS. 3-11: 1-lower joint; 11-a set screw; 2-slips; 23-a slip bowl; 24-slip teeth; 231-toothed plate; 232-gap; 233-slip gullets; 238-bottom of gap; 239-gap neck; 5-a cone; 6-metal sealing ring; 61-sealing ring.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 3 and 4, a soluble metal sealing cartridge includes: the sealing structure comprises a cone 5, a metal sealing ring 6, a slip 2 and a lower joint 1, wherein the cone 5, the metal sealing ring 6, the slip 2 and the lower joint 1 are all soluble metal components; the cone 5 is an aluminum alloy component, the outer surface of the cone is a conical surface, the end with the larger diameter of the cone 5 is a cone bottom, and the end with the smaller diameter of the cone 5 is a cone top. A straight cylindrical channel is axially arranged in the cone 5 and is used for being matched with a setting tool, and the diameter of the channel is 70-80 mm; or the inside of the cone 5 is a truncated cone-shaped channel, the diameter of the minimum end of the channel is 70-80mm, the diameter of the channel is far larger than the aperture of the original through hole of the cone 5, and the backflow efficiency of fracturing fluid and impurities in the well is improved. As a preferable scheme in this embodiment, the circular truncated cone-shaped channel is adopted, the circular truncated cone-shaped channel is compared with the straight cylindrical channel, the diameter of the channel is reduced, and the minimum diameter is 70-80mm, so that the size of the channel inside the cone 5 is increased on the premise of ensuring the basic pressure-bearing capacity of the cone 5, and the fracturing fluid and impurities in the well can be conveniently returned.
The metal sealing ring 6 is sleeved on the cone 5 and is arranged at one end close to the cone bottom of the cone 5, the inner surface of the metal sealing ring 6 is an inner conical surface matched with the outer conical surface of the cone 5, and the radial section of the outer surface of the metal sealing ring 6 is a plane. The metal sealing ring 6 is made of a high-elongation metal, which means a metal with an elongation of 16-35%, as a preferred embodiment, the high-elongation metal is a magnesium alloy, or other soluble metals which can reach the elongation range, and the soluble metals are soluble in a liquid with a corresponding degree of mineralization. The invention adopts the metal sealing ring 6 for sealing, solves the defects of large size and high dissolving condition of the rubber cylinder, has the advantages of good dissolving performance and difficult blockage of the shaft of the rubber cylinder, has better sealing performance compared with the rubber cylinder, and ensures the successful implementation of the process technologies such as upward return test, fracturing reformation and the like. In a preferred embodiment, at least one ring of seal ring 61 is disposed on the metal seal ring 6, the seal ring 61 is used for assisting sealing, and the seal ring 61 can be a metal seal ring 61 or a rubber seal ring 61.
The slips 2 comprise a slip seat 23, and the slip seat 23 is of an integrally formed cylindrical structure with a variable inner diameter. The slip seat 23 is sleeved on the cone 5, one end of the slip seat 23 is abutted to the metal sealing ring 6, the other end of the slip seat 23 is connected with the lower connector 1, and the inner surface of the slip seat 23 is an inner conical surface matched with the outer conical surface of the cone 5. The slip seat 23 of the slip 2 is an integrated structure, a plurality of slip pieces and cutting seams are not needed, the structure of the slip 2 is greatly simplified, the slip has the advantages of simple structure and convenience in processing, the integrated slip seat 23 is not easy to damage in the process of going down the well, and the anchoring performance is improved. Furthermore, because the slip seat 23 adopted by the invention can uniformly transmit force to the metal sealing ring 6, a baffle ring or a composite sheet does not need to be arranged between the metal sealing ring 6 and the slip 2, the sealing can be realized after the baffle ring or the composite sheet is cancelled, the structure of the clip seat is greatly simplified, the overall length of the clip seat is shortened, the processing is very convenient, and the processing efficiency can be greatly improved.
As shown in fig. 5-8, the slip 2 includes a cylindrical slip seat 23, the slip seat 23 is made of a soluble material, such as magnesium alloy or aluminum alloy, and can be dissolved in a liquid with a corresponding mineralization degree in a well, and the whole pressure-bearing capacity of the slip 2 can be satisfied, and a through hole is formed in the slip seat 23 along the axis of the through hole, and the through hole is used for being matched with the bottom of the cone 5 of the clamping seat, i.e., the end with a smaller outer diameter. And the axis of through-hole with the inside axis of slip seat 23 is coaxial, the inside through-hole of slip seat 23 is for leaking hopper-shaped structure, see fig. 11, funnel pipe structure divide into funnel body part and funnel pipe portion, the funnel pipe portion of leaking hopper-shaped structure is established slip seat 23 is equipped with the one end of pinion rack 231, slip seat 23 is not equipped with the one end of pinion rack 231 is funnel body part, and its adaptation is in the 5 surfaces of the cone of cassette, increase the biggest contact surface area of support. And the funnel pipe portion is smaller in size, and the thickness of the toothed plate 231 corresponding to the funnel pipe portion is larger, so that the bearing capacity of one end, provided with the gap 232, of the slip bowl 23 is improved. Wherein the through-hole inside said slip bowl 23 shown in fig. 5-8 can also be of a funnel-like configuration as shown in fig. 11.
One end of the slip seat 23 has a plurality of tooth plates 231, specifically, the slip seat 23 is provided with 6 to 12 tooth plates 231, in this embodiment, 8 tooth plates 231 are uniformly distributed along the circumferential direction of the slip seat 23, and a gap 232 is provided between two adjacent tooth plates 231, an opening of the gap 232 is provided on an end surface of the slip seat 23, and the gap 232 is disposed along an axis of the slip seat 23, specifically, referring to fig. 5 to 8, the gap 232 includes a gap bottom 238 and a gap neck 239, the gap bottom 238 is a C-shaped groove, the gap neck 239 is a strip-shaped groove, the opening of the gap bottom 238 and the gap neck 239 are communicated, the gap neck 239 is disposed at a side close to the lower joint 1, and a size of the gap neck 239 is smaller than a size of the gap bottom 238, specifically, the width of the gap neck 239 is 3-5mm, and the width of the gap bottom 238 is 3-5 times of the width of the gap neck 239. The clearance bottom 238 is a C-shaped groove, which can avoid the slip seat 23 being stressed intensively and damaged, and the clearance neck 239 is a strip-shaped groove, which is convenient for the opening of the toothed plate 231, which guarantees the normal operation of the slip 2, and is convenient for processing. As shown in fig. 9 to 11, the gap 232 can also be a U-shaped groove or an arc-shaped groove, and can also be a semicircular opening, so as to prevent the slip bowl 23 from being damaged due to concentrated stress.
The outer wall of the slip seat 23 is provided with a plurality of slip tooth grooves 233, specifically, 2 to 3 slip tooth grooves 233 are uniformly arranged on the tooth plate 231, and each slip tooth groove 233 is provided with one slip tooth 24, in this embodiment, as shown in fig. 5 to 8, three slip tooth grooves 233 are axially arranged on the tooth plate 231 along the slip seat 23, and one slip tooth 24 is arranged in each slip tooth groove 233, the size of each slip tooth 24 is matched with the size of the corresponding slip tooth groove 233, and a part of each slip tooth 24 is exposed out of the slip tooth groove 233, so as to anchor the slip 2 and the sleeve. Specifically, the slip teeth 24 are cylindrical ceramic components or ceramic metal components, in this embodiment, the slip teeth 24 are cylindrical ceramic metal components, an included angle between an outer end surface of the slip teeth 24 and an axis of the slip seat 23 is less than or equal to 60 °, and the outer end surface of the slip teeth 24 faces away from one end of the slip seat 23 where the toothed plate 231 is arranged, the outer end surface is a bottom surface of the slip teeth 24 opposite to a groove bottom surface of the slip tooth groove 233, and the bottom surface and the axis of the slip seat 23 have an inclined angle to form an inclined surface, so that a contact area between the slip teeth 24 and a sleeve is reduced, the capability of the slip teeth 24 being squeezed into the sleeve is enhanced, and the anchoring capability of the soluble integral slip 2 is better. As an embodiment option, as shown in fig. 9-11, the soluble metal seal cartridge assembled by using the slip bowl 23 shown in fig. 10 is shown in fig. 9, two slip tooth grooves 233 are provided on the tooth plate 231 of each slip bowl 23 along the axial direction of the slip bowl 23, one slip tooth 24 is provided in each slip tooth groove 233, and the number of the slip teeth 24 adapted to the tooth plate 231 is designed according to actual anchoring requirements, so that cost is saved.
Only one end of the slip seat 23 is provided with a toothed plate 231, a gap 232 is formed between the toothed plates 231, when the slip seat 23 climbs on the slope surface of the cone 5, one end of the slip seat 23, which is provided with the toothed plate 231, is used for abutting against the lower joint 1 and is acted by the abutting force of the lower joint 1, the toothed plate 231 on the slip seat 23 can be expanded towards the periphery but cannot be broken until the toothed plate 231 is attached to the inner wall of the sleeve, and the slip teeth 24 are clamped into the inner wall of the sleeve, so that the anchoring function is realized; the end, which is not provided with the toothed plate 231, is used for abutting against the metal sealing ring 6, the force-transferring end surface of the toothed plate is not provided with the gap 232, uniform acting force can be transferred to the metal sealing ring 6, and the metal sealing ring 6 is prevented from being damaged due to nonuniform stress. The size of the slip teeth 24 is matched with that of the corresponding slip tooth groove 233, and a part of the slip teeth 24 is exposed out of the slip tooth groove 233 and is used for realizing anchoring of the slip 2 and the sleeve.
As a preferred embodiment, the slip seat 23 and the metal sealing ring 6 are of an integrally formed structure, and at this time, the slip 2 is made of the same material as the metal sealing ring 6, and the slip 2 and the sealing ring are designed into an integral structure, so that the structure of the clamping seat is simpler, and the processing is more convenient.
The lower joint 1 is installed near one end of the conical top of the cone 5, the lower joint 1 is an aluminum alloy component, one end of the lower joint 1 near the conical bottom of the cone 5 abuts against one end, provided with the toothed plate 231, of the slip 2, and the lower joint 1 is used for being matched with a setting tool. In this embodiment, referring to fig. 9, a plurality of positioning screws 11 are uniformly arranged on an end portion of the lower joint 1 abutting against one end of the slip 2, and the positioning screws 11 are convenient to uniformly position the gap 232 of the slip 2.
When the soluble metal sealing clamping seat is used, the soluble metal sealing clamping seat needs to be matched with a setting tool for use, the setting tool is connected with the lower joint 1, the clamping seat is placed at a corresponding position of a shaft to be blocked by the setting tool, the setting tool pulls the lower joint 1 to enable the lower joint 1 and the cone 5 to generate relative displacement, so that the metal sealing ring 6 and the slips 2 are deformed due to extrusion, the outer wall of the metal sealing ring 6 is in contact with the inside of the shaft to realize sealing, and the slips 2 are deformed or broken to be anchored on the inside of the shaft. When the thrust of the setting tool reaches a certain value, the setting tool drops off from the lower joint 1, the setting tool is taken out, and a soluble plugging device similar to a soluble metal plugging ball is put into the setting tool, wherein the plugging device comprises a first section, the first section is a soluble metal component, and the shape and the size of the outer surface of the first section are respectively matched with the shape and the size of the inner surface of the cone 5, such as: the cylindrical channel is cylindrical, the first section and the circular truncated cone are correspondingly arranged on the channel, the first section is matched with the circular truncated cone or the circular truncated cone, the size of the circular truncated cone-shaped channel is larger than that of the cylindrical channel, and the backflow effect is better. The first section of the plugging device can enter the channel to be plugged, so that surface plugging is realized, the plugging effect is better, the cone 5 can be supported to share the bearing pressure of the cone 5, the cone 5 is prevented from being damaged due to stress, and the whole seating process is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A soluble metal seal cartridge, comprising: the sealing structure comprises a cone (5), a metal sealing ring (6), a slip (2) and a lower joint (1), wherein the cone (5), the metal sealing ring (6), the slip (2) and the lower joint (1) are all soluble metal components;
the outer surface of the cone (5) is a conical surface, and a channel which is axially arranged is arranged in the cone (5);
the metal sealing ring (6) is sleeved on the cone (5);
the slip (2) comprises a plurality of slip tooth grooves (233) and a cylindrical slip seat (23), the slip seat (23) is of an integrated structure, one end of the slip seat (23) is provided with a plurality of toothed plates (231), a gap (232) is formed between every two adjacent toothed plates (231), slip teeth (24) are arranged in the slip tooth grooves (233), the slip (2) is sleeved on the cone (5), and one end of the slip (2) abuts against one end, close to the cone top of the cone (5), of the metal sealing ring (6);
one end of the lower joint (1) close to the conical bottom of the cone (5) abuts against one end, provided with the toothed plate (231), of the slip (2).
2. The soluble metal seal cartridge according to claim 1, wherein the gap (232) comprises a gap bottom (238) and a gap neck (239), the gap bottom (238) is a C-shaped groove, the gap neck (239) is a strip-shaped groove, an opening of the gap bottom (238) communicates with the gap neck (239), the gap neck (239) is disposed at a side near the lower joint (1), and a width of the gap neck (239) is smaller than a width of the gap bottom (238).
3. The soluble metal seal cartridge of claim 2, wherein the width of the clearance neck (239) is 3-5mm and the width of the clearance bottom (238) is 3-5 times the width of the clearance neck (239).
4. The soluble metal seal cartridge according to claim 2, wherein the gap (232) is disposed along an axial direction of the slip bowl (23).
5. The soluble metal seal cartridge according to any of claims 1-4, wherein said metal seal ring (6) is a metal member having an elongation of 16% to 35%.
6. The soluble metal seal cartridge of claim 5 wherein said metal component is a magnesium alloy component.
7. A soluble metal seal cartridge according to any of claims 1 to 4 wherein the slip bowl (23) and the metal seal ring (6) are integrally formed.
8. A soluble metal seal cartridge according to any of claims 1 to 4 wherein said slip bowl (23) contains 6 to 12 said tooth plates (231) and said tooth plates (231) are uniformly provided with 2 to 3 said slip spline grooves (233).
9. The soluble metal seal cartridge according to any one of claims 1 to 4, wherein said passageway is of cylindrical configuration, said passageway having a diameter of 70 to 80 mm; or the channel is in a circular truncated cone-shaped structure, and the diameter of the smallest end of the channel is 70-80 mm.
10. The soluble metal seal cartridge according to any of claims 1-4, wherein the metal seal ring (6) is provided with at least one ring of seal ring (61).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010082860.XA CN113250648A (en) | 2020-02-07 | 2020-02-07 | Soluble metal sealing card seat |
| PCT/CN2020/074856 WO2021155613A1 (en) | 2020-02-07 | 2020-02-12 | Soluble metal sealing clamping seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010082860.XA CN113250648A (en) | 2020-02-07 | 2020-02-07 | Soluble metal sealing card seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113250648A true CN113250648A (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010082860.XA Pending CN113250648A (en) | 2020-02-07 | 2020-02-07 | Soluble metal sealing card seat |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113250648A (en) |
| WO (1) | WO2021155613A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941514B (en) * | 2022-06-10 | 2023-07-21 | 西南石油大学 | Split type soluble ball seat structure suitable for volume fracturing |
| CN116892378B (en) * | 2023-09-11 | 2023-12-19 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2021155613A1 (en) | 2021-08-12 |
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