CN112576213B - Manufacturing method of water injection packer, water injection packer easy to unlock and construction method - Google Patents
Manufacturing method of water injection packer, water injection packer easy to unlock and construction method Download PDFInfo
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- CN112576213B CN112576213B CN201910942097.0A CN201910942097A CN112576213B CN 112576213 B CN112576213 B CN 112576213B CN 201910942097 A CN201910942097 A CN 201910942097A CN 112576213 B CN112576213 B CN 112576213B
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- Prior art keywords
- deblocking
- claw
- water injection
- setting
- injection packer
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- 238000002347 injection Methods 0.000 title claims abstract description 68
- 239000007924 injection Substances 0.000 title claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000010276 construction Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- 210000000078 claw Anatomy 0.000 claims abstract description 126
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 230000000903 blocking effect Effects 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 16
- 238000003801 milling Methods 0.000 claims description 12
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 239000002195 soluble material Substances 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 241000935974 Paralichthys dentatus Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002332 oil field water Substances 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting packers
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
-
- 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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The utility model relates to a manufacturing method of a water injection packer used for a water injection well in petroleum industry, an easily-released water injection packer and a construction method, wherein a deblocking mechanism of the easily-released water injection packer is provided with deblocking claws, deblocking shear pins and deblocking locking blocks, and the deblocking claws are arranged between a central pipe and an upper joint and an upper pressing sleeve and are in threaded connection with the upper joint; the outer diameters of the upper pressing sleeve and the upper blocking sleeve are larger than the outer diameter of the upper joint and are connected with each other through threads and are arranged above the rubber cylinder, the upper pressing sleeve, the upper blocking sleeve and the rubber cylinder are arranged between the upper joint and the setting claw, and the setting claw is connected with the lower joint through the setting shear pin; the upper part of the central tube is connected with the baffle ring, the lower part of the central tube is connected with the lower joint, the deblocking shear pin and the deblocking lock block fix the deblocking claw and the central tube together, the upper part of the setting claw is provided with a setting lock ring and can move upwards along the setting lock ring in the setting process of the water injection packer, and the piston is arranged between the central tube and the lower joint. The relatively independent deblocking mechanism works more reliably when the deblocking mechanism is lifted.
Description
Technical Field
The utility model relates to an underground water injection packer of an oilfield water injection well, in particular to a manufacturing method of the water injection packer, an easily-released water injection packer and a construction method.
Background
At present, compression type packers such as Y341 and the like are commonly used for layered water injection, a plurality of locking blocks are generally arranged between a setting mechanism and a deblocking mechanism of the packer, the locking blocks connect the setting mechanism and the deblocking mechanism into a whole before the packer is set, after the setting is finished, the deblocking mechanism is lifted up, the locking blocks move, the deblocking mechanism is separated from the setting mechanism, and the deblocking mechanism is lifted up continuously, so that the packer deblocking is realized.
Above the design of this kind of packer structure, in deblocking in-process relates to the motion of a plurality of locking pieces, runs into the water injection well stratum and expects sand, perhaps corrodes when the condition such as scale deposit, can't guarantee the reliability of locking piece motion, deblocking mechanism probably blocks, leads to unable deblocking smoothly, causes tubular column mechanical failure in the pit, leads to the operation of repairing in the pit, has increased manufacturing cost.
Thus, development has proposed a packer made using drillable materials that enable it to be drilled out of the seal. Such as:
the patent number is: CN201520973618.6, publication date 2016-05-11 discloses a resin packer, which relates to the field of oil field separate-layer water injection and separate-layer oil extraction. A resin packer, comprising: an upper joint; the central tube is connected with the upper joint and is provided with an outer boss, and the outer boss is positioned at a first position of the central tube; the cone is provided with an inner boss, and the cone is matched with the outer boss of the central tube through the inner boss; the seat sleeve is arranged at the second position of the central tube; the slip seat is arranged on the central tube and connected with the seat envelope, and the slip seat can slide along the central tube; the slips are fixed with the slip seat through lock rings; the lower joint is connected with the central tube; wherein, upper joint, center tube, cone, slips seat and lower joint adopt resin composite material to make, and slips adopt resin composite material to inlay the carbide and make. When the resin packer provided by the utility model fails in deblocking, the grinding shoes can be conveniently driven by the screw drilling tool to drill, and the corrosion resistance of the packer is improved.
The patent number is: CN201420475267.1, publication No. 2015-02-25 discloses a high pressure water injection string which is desirable and drillable, and relates to the field of oilfield water injection. The utility model provides a removable drillable high pressure water injection tubular column, includes intercommunication sliding sleeve, hydraulic anchor, water injection packer, setting ball seat, the ball basket that link to each other through oil pipe in proper order, hydraulic anchor includes first top connection, adapter sleeve, anchor body, endotheca in the support sleeve of first top connection, first top connection and anchor body are connected respectively at the both ends of adapter sleeve, are provided with fluke and bow spring on the anchor body, the support sleeve passes through the shear pin to be fixed to be set up in first top connection, the lower extreme of first top connection is provided with the elastic claw, is provided with the draw-in groove that holds the elastic claw outer end at the inner wall of adapter sleeve, the outer end cartridge of elastic claw is made to the elastic claw to the lower extreme jack of support sleeve in the draw-in groove of adapter sleeve. The water injection packer comprises a second upper joint, an upper central tube, a lower central tube and a lower joint which are sequentially connected from top to bottom, wherein a rubber cylinder, an upper jacket, a cone, slips, a slip seat, a lower jacket, a locking mechanism and a shear pin seat are sequentially sleeved on the periphery of the upper central tube, the lower central tube and the lower joint, the shear pin seat is fixed on the lower joint through a setting starting pin, a first pressure transmission hole is formed in the lower end of the upper central tube and communicated with the inner wall of the upper jacket, a piston is arranged at the lower end of the slip seat and arranged in an annular space between the outer wall of the lower central tube and the lower jacket, and a second pressure transmission hole is formed in the lower end of the lower central tube and communicated with the piston. The first upper joint, the connecting sleeve, the anchor body, the fluke, the second upper joint, the upper central tube, the lower central tube, the upper outer sleeve, the lower outer sleeve, the cone, the slips, the slip seat and the piston are all made of drillable materials. Wherein the drillable material can be ductile iron type material. The utility model can adopt ball throwing, holding pressure and forward rotation of the oil pipe to release and take out the oil pipe above the hydraulic anchor body after the pipe column is blocked, and can rapidly drill, mill and remove the part remained in the well when the salvaging and unblocking are invalid.
But the drillable material has poor tensile property, especially the thread part processed by the drillable material is easy to be pulled out when the drillable material is lifted to be blocked, and the blocking-releasing operation is complicated only by drilling and grinding, so the drillable material water injection packer has very few practical applications. Therefore, the design scheme of the current water injection packer cannot ensure that the packer has higher strength, can be easily released from the clamp, and still uses the conventional metal material packer as main production equipment.
Disclosure of Invention
The utility model aims to solve the problems that the existing conventional water injection packer is complex in deblocking mechanism and easy to block when meeting the sand production or the injected water scaling of a stratum, and provides a manufacturing method of the water injection packer, the water injection packer easy to block and a construction method.
The technical scheme of the utility model is as follows:
the manufacturing method of the water injection packer comprises the following steps: only the parts with the diameter larger than the outer diameter of the upper joint above the rubber cylinder are made of drillable composite materials, only the deblocking block in the deblocking mechanism of the water injection packer is made of soluble materials, and other parts except the parts made of drillable composite materials, the deblocking block made of soluble materials and the rubber cylinder in the water injection packer are made of metal materials; the parts above the rubber cylinder, which are made of drillable composite materials, are connected through threads and have no connection relation with other parts in the water injection packer.
The soluble materials used for the deblocking block comprise magnesium-based alloy and aluminum-based alloy; drillable composite materials used for components above the cement include glass fiber reinforced resins, carbon fiber reinforced resins, and aramid fiber reinforced resins.
The easily-released water injection packer manufactured by the water injection packer manufacturing method comprises a central tube, a rubber cylinder and a piston, wherein a liquid flow hole is formed in the central tube; the deblocking mechanism is provided with a deblocking claw, a deblocking shear pin and a deblocking locking block, and the deblocking claw is arranged between the central tube and the upper joint and the upper pressing sleeve and is in threaded connection with the upper joint; the upper pressing sleeve and the upper blocking sleeve are made of drillable composite materials, the outer diameters of the upper pressing sleeve and the upper blocking sleeve are larger than the outer diameter of the upper joint and are connected through threads and are arranged above the rubber cylinder, the upper pressing sleeve, the upper blocking sleeve and the rubber cylinder are arranged between the upper joint and the setting claw, and the setting claw is connected with the lower joint through a setting shear pin; the upper part of the central tube is connected with the baffle ring, the lower part of the central tube is connected with the lower joint, the deblocking shear pin and the deblocking lock block fix the deblocking claw and the central tube together, the upper part of the setting claw is provided with a setting lock ring and can move upwards along the setting lock ring in the setting process of the water injection packer, and the piston is arranged between the central tube and the lower joint.
The upper body of the deblocking claw is a cylindrical body, the lower body of the deblocking claw is a claw sheet, an unlocking boss is arranged at the lower part of the claw sheet, and a deblocking shear pin assembly hole and a deblocking block assembly hole are arranged in the claw sheet below the unlocking boss.
The claw piece of deblocking claw is equipped with three at least, and the unblock boss external diameter of claw piece lower part is greater than the internal diameter of setting catch, and unblock boss upper end is equipped with the chamfer.
The upper outer wall of the central tube is provided with a connecting step, a deblocking claw is arranged in the body of the connecting step, and the outer wall of the connecting step is provided with threads and is connected with a baffle ring through a groove; the liquid flow hole in the central tube corresponds to the bottom of the piston.
The deblocking claws in the connecting steps of the central tube are in line with the claw pieces of the deblocking claws in number through grooves, and the outer wall of the middle part of the central tube is provided with deblocking shear pin assembly grooves and deblocking block assembly grooves which are respectively connected with deblocking shear pins and deblocking blocks in deblocking shear pin assembly holes and deblocking block assembly holes at the lower parts of the claw pieces of the deblocking claws.
The lower body of the setting claw is a stepped cylinder, the upper part of the setting claw is provided with claw sheets, the number of the claw sheets of the setting claw is equal to that of the claw sheets of the unlocking claw, and the setting claw is connected with the setting locking ring after being inserted in a staggered manner with the unlocking boss of the unlocking claw.
The seal lock ring is an opening ring, one side of the ring body is longitudinally opened, an upper inclined clamping tooth is arranged in the inner circle of the ring body, and the seal lock ring is arranged between the upper pressing sleeve and the upper blocking sleeve.
The inner circle of the upper pressing sleeve is a stepped inner circle, a baffle ring is arranged below an upper bench of the stepped inner circle, and a setting lock ring is arranged below a lower bench.
The outer diameters of the upper pressing sleeve and the upper blocking sleeve are smaller than the inner diameter of the sleeve and larger than the inner diameter of the milling tool.
The construction method of the water injection packer easy to release the card comprises the following steps:
when in setting, hydraulic pressure is applied from the ground, high-pressure liquid enters from a liquid flow hole in the central tube, pushes the piston to ascend, shears the setting shear pin and pushes the setting claw to ascend, and the rubber cylinder seals the oil separation sleeve annulus;
when in deblocking, after the deblocking block is dissolved, the deblocking block can be deblocked by lifting the joint;
if the deblocking fails, a milling tool can be put in to drill the upper pressing sleeve, the upper blocking sleeve and the rubber cylinder.
Compared with the existing water injection packer, the water injection packer has the remarkable use effects that:
1) The deblocking lock block made of the deblocking shear pin and the soluble material is used for forming a deblocking mechanism which is easy to unblock and relatively independent, and the deblocking lock block can be lifted for deblocking after being dissolved. Compared with the design scheme that the deblocking actions of the traditional Y341 and other packers depend on the setting actions, the relatively independent deblocking mechanism works more reliably when the deblocking mechanism is lifted.
2) The upper pressing sleeve and the upper blocking sleeve which are made of drillable composite materials are used for realizing the milling, drilling and unsealing of the rubber cylinder and the parts above the rubber cylinder. The other parts except the deblocking locking block, the upper pressing sleeve, the upper blocking sleeve and the rubber cylinder are all made of conventional metal materials, so that the integral strength of the packer is ensured; the upper pressing sleeve and the upper blocking sleeve are in threaded connection and have no connection relation with other parts, and only bear axial extrusion force in the process of setting and unsetting the packer, so that the defects of poor threaded connection performance and poor tensile property of drillable material parts are effectively avoided.
The easily-released water injection packer is suitable for separate-layer water injection operation, and is especially suitable for well conditions of stratum sand production or serious scaling. According to the easily-released water injection packer, the deblocking locking piece made of the dissolvable material is adopted, so that the lifting deblocking action of the water injection packer is independently executed without depending on other actions of the packer, and the lifting deblocking reliability is greatly improved; the upper pressing sleeve and the upper blocking sleeve are made of drillable composite materials, and can be sleeved, milled and removed, so that deblocking is realized, and the deblocking success rate is further improved.
In summary, compared with the conventional metal material packer, the packer has the advantages of simple structure and reliable operation, can be lifted for deblocking or can be removed for deblocking through milling, effectively avoids the accident of blocking a downhole water injection string, can greatly reduce the workover cost, and has wide application prospect.
Drawings
FIG. 1 is a schematic diagram of the structure of the water injection packer with easy releasing clamp of the utility model.
In fig. 1: the device comprises an upper joint 1, a central tube 2, a deblocking claw 3, an upper pressing sleeve 4, a baffle ring 5, a setting lock ring 6, a deblocking shear pin 7, a deblocking lock block 8, an upper baffle sleeve 9, a rubber cylinder 10, a setting claw 11, a setting shear pin 12, a piston 13 and a lower joint 14.
Detailed Description
The following detailed description and technical content related to the present utility model are detailed in conjunction with the accompanying drawings, which are, however, only for reference and illustration, and are not intended to limit the scope of the present utility model. The following description is of the preferred embodiments of the utility model, and other equivalent variations for carrying out the utility model are intended to be within the scope of the utility model.
The manufacturing method of the water injection packer comprises the following steps: only the parts with the diameter larger than the outer diameter of the upper joint above the rubber cylinder are made of drillable composite materials, only the deblocking block in the deblocking mechanism of the water injection packer is made of soluble materials, and other parts except the parts made of drillable composite materials, the deblocking block made of soluble materials and the rubber cylinder in the water injection packer are made of metal materials; the parts above the rubber cylinder, which are made of drillable composite materials, are connected through threads and have no connection relation with other parts in the water injection packer.
The soluble materials used for the deblocking block comprise magnesium-based alloy and aluminum-based alloy; drillable composite materials used for components above the cement include glass fiber reinforced resins, carbon fiber reinforced resins, and aramid fiber reinforced resins.
Referring to fig. 1, the easy-to-unclamp water injection packer manufactured by the water injection packer manufacturing method comprises a central pipe 2, a rubber cylinder 10 and a piston 13, wherein a liquid flow hole is formed in the central pipe 2; the deblocking mechanism is provided with a deblocking claw 3, a deblocking shear pin 7 and a deblocking locking block 8, and the deblocking claw 3 is arranged between the central tube 2 and the upper joint 1 and the upper pressing sleeve 4 and is in threaded connection with the upper joint 1; the upper pressing sleeve 4 and the upper blocking sleeve 9 are made of drillable composite materials, the outer diameters of the upper pressing sleeve 4 and the upper blocking sleeve 9 are larger than the outer diameter of the upper joint 1 and are connected through threads and are arranged above the rubber cylinder 10, the upper pressing sleeve 4, the upper blocking sleeve 9 and the rubber cylinder 10 are arranged between the upper joint 1 and the setting claw 11, and the setting claw 11 is connected with the lower joint 14 through the setting shear pin 12; the upper part of the central tube 2 is connected with the baffle ring 5, the lower part is connected with the lower joint 14, the deblocking shear pin 7 and the deblocking lock block 8 fix the deblocking claw 3 and the central tube 2 together, the upper part of the setting claw 11 is provided with the setting lock ring 6 and can move upwards along the setting lock ring 6 in the setting process of the water injection packer, and the piston 13 is arranged between the central tube 2 and the lower joint 14.
The unlocking block 8 is made of soluble materials, can be automatically dissolved in underground liquid, and the dissolution time can be adjusted according to actual requirements, so that different dissolution times can be obtained by adjusting the content of the soluble materials. After the deblocking locking block 8 is dissolved, the deblocking claw 3 is lifted up to be deblocked, and the upper pressing sleeve 4 and the upper blocking sleeve 9 which are made of the drillable composite material can be used for facilitating the milling construction after deblocking failure.
According to the design scheme of the method, the soluble sealing block 8 can be automatically dissolved in underground liquid, and the dissolution time can be adjusted according to actual requirements. The upper pressing sleeve 4 and the upper blocking sleeve 9 are connected through threads and are arranged above the rubber cylinder 10, and after the deblocking locking block 8 is dissolved, the deblocking claw 3 is lifted up to be deblocked. After the lifting and the unpacking fail, a milling tool can be put in, and the upper pressing sleeve 4, the upper baffle sleeve 9 and the rubber sleeve 10 in the packer are sequentially drilled out, so that the sealing between the packer and the shaft can be relieved.
On the basis of the first embodiment, the present utility model also has the following embodiments:
example two
The upper body of the unsealing claw 3 is a cylindrical body, the lower body is a claw sheet, an unlocking boss is arranged at the lower part of the claw sheet, and unsealing shear pin assembly holes and unsealing block assembly holes are arranged in the claw sheet below the unlocking boss.
The claw piece of deblocking claw 3 is equipped with three at least, and the unblock boss external diameter of claw piece lower part is greater than the internal diameter of setting catch 6, and unblock boss upper end is equipped with the chamfer, conveniently slides in setting catch 6, struts setting catch 6.
Example III
The upper outer wall of the central tube 2 is provided with a connecting step, a deblocking claw is arranged in the body of the connecting step, and the outer wall is provided with threads to be connected with a baffle ring 5 through a groove; the flow holes in the central tube 2 correspond to the bottoms of the pistons 13. The central tube 2 is connected with the baffle ring 5 and simultaneously plugs the deblocking claw 3 in a connecting step of the upper outer wall.
The deblocking claws in the connecting steps of the central tube 2 are in line with the claw pieces of the deblocking claws 3 in number through grooves, deblocking shear pin assembling grooves and deblocking block assembling grooves are formed in the outer wall of the middle of the central tube 2, and the deblocking shear pins 7 and deblocking locking blocks 8 in the deblocking shear pin assembling holes and deblocking block assembling holes are respectively connected with the lower parts of the claw pieces of the deblocking claws 3.
Example IV
The lower body of the setting claw 11 is a stepped cylinder, the upper part of the setting claw is provided with claw sheets, the number of the claw sheets of the setting claw 11 is equal to that of the claw sheets of the deblocking claw 3, and the setting claw is connected with the setting lock ring 6 after being inserted in a staggered manner with the unlocking boss of the deblocking claw 3.
Example five
The seal lock ring 6 is an open ring, one side of the ring body is longitudinally opened, an upper inclined clamping tooth is arranged in the inner circle of the ring body, and the seal lock ring 6 is arranged between the upper pressing sleeve 4 and the upper blocking sleeve 9.
Example six
The inner circle of the upper pressing sleeve 4 is a ladder inner circle, a baffle ring 5 is arranged below an upper ladder table of the ladder inner circle, and a setting lock ring 6 is arranged below a lower ladder table.
The outer diameters of the upper pressing sleeve 4 and the upper retaining sleeve 9 are smaller than the inner diameter of the sleeve and larger than the inner diameter of the milling tool.
The construction method of the water injection packer easy to release the card comprises the following steps:
when in setting, hydraulic pressure is applied from the ground, high-pressure liquid enters from a liquid flow hole in the central tube 2, pushes the piston 13 to ascend, shears the setting shear pin 12 and pushes the setting claw 11 to ascend, and the rubber cylinder 10 is extruded to seal an oil-separating sleeve annulus;
when in deblocking, after the deblocking block 8 is dissolved, the joint 1 is lifted up to be deblocked;
if the deblocking fails, a milling tool can be put in to drill the upper pressing sleeve 4, the upper blocking sleeve 9 and the rubber cylinder 10, so as to realize the deblocking of the rubber cylinder 10.
In the construction method of the water injection packer easy to unlock, in the setting process of the water injection packer, the unlocking locking block 8 is solid before being dissolved, the unlocking claw 3 and the central tube 2 are locked into a whole, the claw piece of the setting claw 11 can only ascend along the setting locking ring 6 in the claw piece of the unlocking claw 3, and the restriction of the upper inclined clamping teeth in the inner circle of the setting locking ring 6 can not be fallen down, so that the packing element 10 is compressed, and the setting is realized.
When the setting of the packer is implemented, firstly, hydraulic pressure is applied to the inside of the central tube 2, high-pressure liquid enters between the piston 13 and the lower joint 14 through a liquid flow hole at the lower part of the central tube 2, the piston 13 is pushed by the high-pressure liquid to move upwards, the setting claw 11 is pushed by the piston 13 to move upwards, and meanwhile, the setting shear pin 12 is sheared; the setting claw 11 continues to move upwards, the compression rubber cylinder 10 realizes setting, and simultaneously, the claw piece of the setting claw 11 and the setting lock ring 6 realize unidirectional engagement, namely, the claw piece of the setting claw 11 can only move upwards relative to the setting lock ring 6, and the setting lock ring 6 is kept motionless under the limitation of the upper pressing sleeve 4 and the upper blocking sleeve 9; when the hydraulic pressure is stopped, the sealing ring 6 is still kept still under the limitation of the upper pressing sleeve 4 and the upper blocking sleeve 9, the sealing claw 11 cannot move, and the rubber cylinder 10 realizes stable sealing.
In the process of deblocking the packer, after the deblocking lock block 8 is dissolved, the joint 1 is lifted up to drive the lifting deblocking claw 3, the deblocking claw 3 is connected with the central tube 2 only by means of the deblocking shear pin 7, and the lifting deblocking claw 3 is continuously used for cutting off the deblocking shear pin 7. At this time, the central tube 2 is not moved, the deblocking claw 3 moves upwards, the unlocking boss at the lower part of the deblocking claw 3 struts the setting lock ring 6, the one-way occlusion of the setting lock ring 6 and the setting claw 11 is released, and the setting claw 11 moves downwards under the action of the elastic force of the rubber cylinder 10, so that the rubber cylinder 10 is deblocked.
The deblocking claw 3 is continuously lifted, the unlocking boss at the lower part of the deblocking claw 3 drives the setting lock ring 6 and the upper pressing sleeve 4 to move upwards, the upper pressing sleeve 4 drives the upper blocking sleeve 9 to move upwards, the constraint of the rubber cylinder 10 is further relieved, and the complete deblocking is realized.
The deblocking claw 3 is continuously lifted, the deblocking boss at the lower part of the deblocking claw 3 is blocked by the baffle ring 5, the baffle ring 5 is driven to move upwards, and the baffle ring 5 drives the central pipe 2 to move upwards together, so that the whole packer is carried out of the well.
In the process of casing milling with failure in unsealing, as the upper pressing sleeve 4 and the upper blocking sleeve 9 are made of drillable composite materials and have no connection relation with other parts, after the unsealing of the lifting unsealing claw 3 fails, a casing milling tool can be put in, the upper pressing sleeve 4, the upper blocking sleeve 9 and the rubber sleeve 10 are drilled out in sequence, and the sealing between the packer and a shaft is released; then the upper joint 1 is lifted up and the lifting and unlocking claw 3 and the central tube 2 are driven in sequence, so that the whole packer is brought to the ground.
The embodiments described above are only exemplary embodiments, but the present utility model is not limited to these embodiments, and modifications may be made by those skilled in the art without departing from the spirit and scope of the utility model. Many variations, combinations, and modifications of the arrangements disclosed herein are possible and are within the scope of the utility model, and therefore, the scope of protection is not limited solely by the description set forth above.
Claims (12)
1. The utility model provides an easy unblock water injection packer, includes center tube (2), packing element (10) and piston (13), is equipped with the liquid flow hole, characterized by above center tube (2): the deblocking mechanism is provided with a deblocking claw (3), a deblocking shear pin (7) and a deblocking locking block (8), and the deblocking claw (3) is arranged between the central tube (2) and the upper joint (1) and the upper pressing sleeve (4) and is in threaded connection with the upper joint (1); the upper pressing sleeve (4) and the upper blocking sleeve (9) are made of drillable composite materials, the outer diameters of the upper pressing sleeve (4) and the upper blocking sleeve (9) are larger than the outer diameter of the upper joint (1) and are connected through threads and are arranged above the rubber cylinder (10), the upper pressing sleeve (4), the upper blocking sleeve (9) and the rubber cylinder (10) are arranged between the upper joint (1) and the setting claw (11), and the setting claw (11) is connected with the lower joint (14) through the setting shear pin (12); the upper part of the central tube (2) is connected with the baffle ring (5), the lower part of the central tube is connected with the lower joint (14), the deblocking shear pin (7) and the deblocking locking block (8) fix the deblocking claw (3) with the central tube (2) together, the upper part of the setting claw (11) is provided with the setting locking ring (6) and can move upwards along the setting locking ring (6) in the setting process of the water injection packer, and the piston (13) is arranged between the central tube (2) and the lower joint (14); the upper body of the deblocking claw (3) is a cylindrical body, the lower body is a claw sheet, an unlocking boss is arranged at the lower part of the claw sheet, and the outer diameter of the unlocking boss at the lower part of the claw sheet is larger than the inner diameter of the setting lock ring (6); the number of the claw pieces of the setting claw (11) is equal to that of the claw pieces of the deblocking claw (3), and the claw pieces are connected with the setting lock ring (6) after being inserted in a staggered way with the unlocking boss of the deblocking claw (3); the setting lock ring (6) is arranged between the upper pressing sleeve (4) and the upper blocking sleeve (9); a setting lock ring (6) is arranged below the lower bench of the upper pressing sleeve (4).
2. The easy-to-unlock water injection packer of claim 1, wherein only the part with the diameter larger than the outer diameter of the upper joint above the rubber cylinder is made of drillable composite material, only the unlocking block in the unlocking mechanism of the water injection packer is made of soluble material, and the rest parts of the water injection packer are made of metal materials except the part made of drillable composite material, the unlocking block made of soluble material and the rubber cylinder;
the parts above the rubber cylinder, which are made of drillable composite materials, are connected through threads and have no connection relation with other parts in the water injection packer.
3. The easy-to-unlock water injection packer of claim 2, wherein said soluble materials used for said unlock block include magnesium-based alloys and aluminum-based alloys; drillable composite materials used for components above the cement include glass fiber reinforced resins, carbon fiber reinforced resins, and aramid fiber reinforced resins.
4. The easy-to-unlock water injection packer of claim 3, wherein an unlock shear pin assembly hole and an unlock block assembly hole are arranged in a claw piece below an unlock boss of the unlock claw (3).
5. The easy-to-unlock water injection packer of claim 4, wherein at least three claw pieces of the unlocking claw (3) are arranged, and a chamfer is arranged at the upper end of the unlocking boss.
6. The water injection packer easy to unlock as set forth in claim 3, wherein the upper outer wall of said central tube (2) is provided with a connecting step, the body of the connecting step is provided with an unlock claw which is connected with a baffle ring (5) through a groove, and the outer wall is provided with a thread; the liquid flow hole in the central tube (2) corresponds to the bottom of the piston (13).
7. The water injection packer easy to unlock as set forth in claim 6, wherein the unlocking claws in the connecting steps of the central tube (2) are matched with the number of the claw pieces of the unlocking claws (3) through grooves, and the outer wall of the middle part of the central tube (2) is provided with unlocking shear pin assembling grooves and unlocking block assembling grooves which are respectively connected with the unlocking shear pins (7) in the unlocking shear pin assembling holes and the unlocking block assembling holes at the lower parts of the claw pieces of the unlocking claws (3).
8. The easy-to-seize water injection packer as set forth in claim 3, characterized in that the lower body of the setting jaw (11) is a stepped cylinder and the upper part is a jaw piece.
9. The water injection packer easy to unlock as set forth in claim 3, wherein said setting lock ring (6) is a split ring, a side of the ring body is longitudinally opened, and an inner circle of the ring body is provided with upper inclined locking teeth.
10. The water injection packer easy to unlock as set forth in claim 3, wherein the inner circle of said upper pressure sleeve (4) is a stepped inner circle, and a baffle ring (5) is installed below the upper landing of said stepped inner circle.
11. The easy-to-seize water injection packer according to claim 10, characterized in that the outer diameter of the upper press sleeve (4) and the upper stop sleeve (9) is smaller than the inner diameter of the casing and larger than the inner diameter of the milling tool.
12. The construction method applied to the water injection packer easy to unlock as set forth in any one of claims 1 to 11, characterized by comprising the following steps: when in setting, hydraulic pressure is applied from the ground, high-pressure liquid enters from a liquid flow hole in the central tube (2), pushes the piston (13) to ascend, shears the setting shear pin (12) and pushes the setting claw (11) to ascend, and presses the rubber cylinder (10) to seal an oil-separating sleeve annulus; when in deblocking, after the deblocking block (8) is dissolved, the deblocking can be performed by lifting the joint (1); and if the deblocking fails, a milling tool is put in, and the upper pressing sleeve (4), the upper blocking sleeve (9) and the rubber sleeve (10) are drilled out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942097.0A CN112576213B (en) | 2019-09-30 | 2019-09-30 | Manufacturing method of water injection packer, water injection packer easy to unlock and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942097.0A CN112576213B (en) | 2019-09-30 | 2019-09-30 | Manufacturing method of water injection packer, water injection packer easy to unlock and construction method |
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| Publication Number | Publication Date |
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| CN112576213A CN112576213A (en) | 2021-03-30 |
| CN112576213B true CN112576213B (en) | 2023-12-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976133A (en) * | 1975-02-05 | 1976-08-24 | Brown Oil Tools, Inc. | Retrievable well packer |
| CN2540501Y (en) * | 2002-04-09 | 2003-03-19 | 高文惠 | Water filling packer |
| CN2571992Y (en) * | 2002-09-07 | 2003-09-10 | 孔宪春 | Packer capable of repeatedly downhole setting seal |
| CN2651432Y (en) * | 2003-11-10 | 2004-10-27 | 长春市恒大石油机械厂 | Reusable packer |
| RU2414586C1 (en) * | 2010-02-02 | 2011-03-20 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Procedure for isolating operations in well and packer equipment |
-
2019
- 2019-09-30 CN CN201910942097.0A patent/CN112576213B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3976133A (en) * | 1975-02-05 | 1976-08-24 | Brown Oil Tools, Inc. | Retrievable well packer |
| CN2540501Y (en) * | 2002-04-09 | 2003-03-19 | 高文惠 | Water filling packer |
| CN2571992Y (en) * | 2002-09-07 | 2003-09-10 | 孔宪春 | Packer capable of repeatedly downhole setting seal |
| CN2651432Y (en) * | 2003-11-10 | 2004-10-27 | 长春市恒大石油机械厂 | Reusable packer |
| RU2414586C1 (en) * | 2010-02-02 | 2011-03-20 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Procedure for isolating operations in well and packer equipment |
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| Publication number | Publication date |
|---|---|
| CN112576213A (en) | 2021-03-30 |
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