CN217813392U - Annulus protection packer - Google Patents
Annulus protection packer Download PDFInfo
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- CN217813392U CN217813392U CN202221745662.8U CN202221745662U CN217813392U CN 217813392 U CN217813392 U CN 217813392U CN 202221745662 U CN202221745662 U CN 202221745662U CN 217813392 U CN217813392 U CN 217813392U
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- mandrel
- sleeved
- packer
- hydraulic cylinder
- rubber
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Abstract
The utility model discloses an annular space protection packer has: the detachable dabber reaches the cover and locates the spindle is last slips subassembly, the relevant subassembly of packing element, second grade hydraulic cylinder subassembly, locking subassembly, first grade hydraulic cylinder subassembly and the slips subassembly down, the dabber runs through slips subassembly down the relevant subassembly of packing element second grade hydraulic cylinder subassembly the locking subassembly first grade hydraulic cylinder subassembly go up the slips subassembly to with top connection. Therefore, the reliability of the annular packer with the problem of annular pressure in the control of the water injection well in the current stage can be improved, and the well control risk during the operation of the annular packer can be reduced.
Description
Technical Field
The utility model relates to an annular space protection packer.
Background
With the continuous increase of the crude oil exploitation quantity of the Bohai sea offshore oil field, the exploitation rate is improved for supplementing formation energy, and the quantity of water injection wells is increased. The water injection pipe column is easy to extend or shorten due to continuous change of backwashing, stopping injection, injection pressure and injection allocation quantity in the water injection process, acting force is generated on the packer, the pipe column wriggles, the packer is unsealed or sealed to lose efficacy, and accordingly annular pressure of the water injection well is increased. According to incomplete statistics, most water injection wells in the Bohai sea oil field have casing pressure problems of different degrees, and the number of wells to be solved urgently tends to increase continuously.
In addition, most water injection wells need sand prevention due to the stratum characteristics of the Bohai sea oil field, and a back-plugging pipe string and a separate injection sand prevention pipe string completion pipe string are mostly adopted in separate injection water injection wells. In order to control casing pressure, an annular packer is added in a back-plugging tubular column for controlling casing pressure, so that the well control risk is reduced.
Aiming at the structural form that a back-plugging pipe column is adopted in the offshore sand control water injection pipe column at the present stage, in the later water injection process, the lower part is very easy to be plugged and sealed to lose efficacy due to the operations of repeated stopping injection, backwashing, continuous change of injection pressure and the like, so that the annulus pressure is increased in the later water injection process, and the well control risk is increased.
At present, the Bohai sea offshore oil field water injection well has two most annular packers for controlling annular pressure. One is to select the conventional rubber sleeve expanding packer as the annular packer, and the other is to adopt the conventional rubber sleeve compression type production packer as the annular packer, but the two annular packers have disadvantages respectively.
The rubber sleeve expansion type packer has the following defects: 1) The rubber sleeve has the advantages that the rubber sleeve does not contain slips, the anti-creep performance is poor, the pressure difference grade is related to the water injection pressure, and the lower the injection pressure is, the poorer the sealing performance of the rubber sleeve is. 2) The repeated expansion sealing and unsealing can occur due to the water well stopping, well washing, injection pressure change and injection quantity change, the rubber cylinder is easy to generate fatigue and abrasion, and the sealing performance is poor.
The conventional rubber sleeve compression type production packer has the following main defects: 1) The packer setting process needs oil pipe plugging, oil pipe pressure building needs to be carried out on the shearing ball seat through the action of a blanking plug thrown into a steel wire operation pipe or a steel ball thrown into the pipe, packer setting is completed, the blanking plug needs to be fished out continuously or pressurization is carried out continuously to shear the shearing ball seat after setting is completed, and the operation process is complex and tedious. 2) The packer can be completely set only by high oil pipe pressure during setting, the requirement on the sealing pressure grade of the whole pipe column is high, and the well control risk is high.
Therefore, the tubular column is easy to creep due to the change of injection stopping, backwashing, injection pressure and injection quantity in the water injection process of the water injection well, so that the annular packer is required to have strong anchoring capability and good creep resistance.
Because the injection pressure of the water injection well in the later stage of water injection is generally higher, the pressure-resistant grade of the annular packer rubber cylinder is required to be high, the rubber cylinder is easy to generate fatigue wear because the sealing performance of the expansion type rubber cylinder is related to the injection pressure difference, the pressure-resistant grade of the compression type rubber cylinder is superior, the pressure-resistant performance is stable, and the annular packer rubber cylinder is required to adopt a compression type rubber cylinder structure form.
The recovery mode of the annular packer is simple, and the recovery of the packer can be realized by lifting. In addition, the setting mode of the annular packer is simple, the setting pressure difference is low, and the well control risk is low.
When the annular packer is recovered, the trap pressure possibly exists up and down in the rubber sleeve, so that pressure balance can be realized firstly when the packer is recovered, or the oil sleeve can be communicated to carry out a circulating well killing process, and the well control risk is reduced.
Disclosure of Invention
The utility model relates to a development an annular space protection packer to improve the reliability of present stage water injection well control annular space area problem annular space packer and reduce the well accuse risk when annular space packer operates.
An annular space protection packer is provided,
the device comprises a detachable mandrel, and a lower slip component, a rubber cylinder component, a second-stage hydraulic cylinder component, a locking component, a first-stage hydraulic cylinder component and an upper slip component which are sequentially sleeved on the mandrel;
the cover is established the spindle is epaxial slip subassembly down, it has four groups of slips in proper order and supports and lean on the lower clutch in slip one end down, the lower clutch with the spindle is fixed through the deblocking pin.
As a further preference, the glue cartridge assembly comprises:
the rubber cylinder mandrel is sleeved and fixed on the mandrel; the other ends of the four groups of slips are propped against the rubber cylinder mandrel;
the middle rubber cylinder is positioned in the middle of the rubber cylinder mandrel, and the two side rubber cylinders are respectively positioned on two sides of the middle rubber cylinder;
the two spacer rings are respectively arranged in front of the middle rubber cylinder and the side rubber cylinders;
the connecting body is abutted against and fixed on the right side of the rubber cylinder;
and the shearing pin fixes the connecting body on the rubber cylinder mandrel.
As a further preferred, the second-stage hydraulic cylinder includes:
the second hydraulic cylinder is sleeved and fixed on the mandrel;
a second seal against the second hydraulic cylinder;
a snap ring securing the second seal body to the mandrel.
As a further preference, the locking assembly comprises:
the piston is sleeved on the mandrel; the baffle ring is sleeved on the piston, and the shear pin fixes the baffle ring on the piston;
a locking block sleeve, part of the inner surface of which is an inclined surface;
the locking block is sleeved on the piston, and the outer surface of the locking block is an inclined surface;
wherein, the inclined plane of locking piece and the cooperation of the interior inclined plane of locking piece sleeve.
As a further preferred feature, the first stage hydraulic cylinder assembly includes:
first pneumatic cylinder cover is established at the dabber, and first seal sets up between first pneumatic cylinder and dabber, and two snap rings are located first seal both sides respectively, fixed seal.
As a further preference, the upper slip assembly includes: the slip support is sleeved on the mandrel and abuts against the upper slip, and the stop cap is sleeved on the mandrel and fixed on the mandrel through threads.
The utility model discloses following beneficial effect has at least:
this annular space protection packer design has upper and lower two sets of slips, and anchoring performance is reliable, and the centre is provided with a set of compression packing element, and when annular space protection packer set seal, through annular space pressurization, the annular space between extrusion packing element seal packer and the sleeve pipe, it is sealed reliable. This annular space protection packer is provided with the two-stage pneumatic cylinder, can make the packer accomplish the setting process through lower annular pressure, and whole operation process pressure is low, and well control risk is low.
When the packer is recycled, the lifting pipe column releases the effects of components such as an upper slip, a rubber cylinder and a lower slip and the wall of a casing pipe after shearing the deblocking pin, and the recycling of the annular space protection packer is completed. The circulation hole arranged on the mandrel can balance the pressure between the oil pipe and the annulus.
Drawings
Fig. 1 is a perspective view of an annular protection packer according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a mandrel and a lower slip assembly of an annular protection packer according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a rubber sleeve assembly of an annular protection packer according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a second stage hydraulic cylinder assembly of an annular protection packer according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a locking assembly of an annular protection packer according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a first-stage hydraulic cylinder assembly of an annular protection packer according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of an upper slip assembly of an annular protection packer according to an embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.
As shown in fig. 1 and 2, the annular protection packer 1 of the present invention has: the mandrel comprises a detachable mandrel 10, a lower slip component 20, a rubber cylinder related component 30, a second-stage hydraulic cylinder component 40, a locking component 50, a first-stage hydraulic cylinder component 60 and an upper slip component 70, wherein the lower slip component 20, the rubber cylinder related component 30, the second-stage hydraulic cylinder component 40, the locking component 50, the first-stage hydraulic cylinder component 60 and the upper slip component 70 are sleeved on the mandrel, and the mandrel 10 penetrating through the lower slip component 20, the rubber cylinder related component 30, the second-stage hydraulic cylinder component 40, the locking component 50, the first-stage hydraulic cylinder component 60 and the upper slip component 70 is connected with an upper joint.
In addition, as shown in fig. 2, the lower slip assembly 20 is sleeved on the mandrel 10, and has 4 sets of slips 201 and a lower joint 202 for limiting the lower slips, the lower joint 202 is fixed with the mandrel 10 through a deblocking pin 203, and the mandrel is provided with a through hole 101 capable of communicating inside and outside, is located at the lower end position of the lower joint 202, and is sealed by a sealing ring inside the lower joint 202. Four sets of slips 201 are arranged on the outer periphery of the mandrel 10, one end of each slip abuts against the rubber barrel mandrel 306, the lower connector 202 is sleeved on the mandrel and abuts against the four sets of slips 201, and the lower connector 202 is fixed on the mandrel 10 through the deblocking pins 203.
In addition, as shown in fig. 3, the rubber cylinder assembly 30 is sleeved on the mandrel 10, and includes: the rubber tube mandrel 306, a spacer ring 305 sleeved on the rubber tube mandrel 306, a middle rubber tube 304, a side rubber tube 303 and a connecting body 301 are arranged; and a shear pin 302 for securing. Wherein, the rubber tube mandrel 306 is sleeved and fixed on the mandrel 10, the middle rubber tube 304 is positioned in the middle of the rubber tube mandrel 306, and the two side rubber tubes 303 are respectively positioned at two sides of the middle rubber tube 304; two spacer rings 305 are respectively arranged in front of the middle rubber cylinder 304 and the side rubber cylinder 303; the connecting body 301 is secured against the right side of the right-side glue barrel 304 and the shear pin 302 secures the connecting body 301 to the glue barrel mandrel 306.
In addition, as shown in fig. 4, the second stage hydraulic cylinder assembly 40 is sleeved on the mandrel 10, the second stage hydraulic cylinder assembly 40 has a second hydraulic cylinder 401, a second sealing body 402 and a clamping ring 403, and a liquid inlet hole 4001 is arranged outside the second hydraulic cylinder 401. The second hydraulic cylinder 401 is sleeved on the mandrel 10, the second sealing body 402 abuts against the second hydraulic cylinder 401, the snap ring 403 fixes the second sealing body 402 on the mandrel 10,
in addition, as shown in fig. 5, the locking member 50, which is fitted over the mandrel 10, has: shear pin 501, stop ring 502, locking block 503, locking block sleeve 504, piston 505; both the locking block 503 and the plunger 505 are provided with saw-toothed threads, and the locking block 503 can only slide on the plunger 505 in one direction. The plunger 505 is sleeved on the mandrel 10, the stop ring 502 is sleeved on the plunger 505, the stop ring 502 is fixed on the plunger 505 by the shear pin 501, part of the inner surface of the locking block sleeve 504 is an inclined surface, one end of the locking block sleeve abuts against the stop ring 502, the locking block 502 is sleeved on the plunger 505, the outer surface of the locking block sleeve 504 is an inclined surface, before the locking block 502 is inserted into the locking block sleeve 504 and the plunger 505, the inclined surface of the locking block 502 is matched with the inner inclined surface of the locking block sleeve 504.
In addition, as shown in fig. 6, the first stage hydraulic cylinder assembly 60, which is fitted over the mandrel 10, has: first pneumatic cylinder 601, snap ring 602, first seal 603, wherein first pneumatic cylinder 601 outside is provided with feed liquor hole 6001. The first hydraulic cylinder 601 is sleeved on the mandrel 10, the first sealing body 603 is arranged between the first hydraulic cylinder 601 and the mandrel 10, and the two clamping rings 602 are respectively located on two sides of the first sealing body 603 to fix the sealing body 603.
Additionally, as shown in FIG. 7, an upper slip assembly 70, which is fitted over the mandrel 10, has: a cone 701, 4 pieces of upper slips 702, a slip bracket 703 and a stop cap 704. The cone 701 is sleeved on the mandrel 10, the 4 upper slips 702 are arranged on the outer periphery of the mandrel 10 and abut against the cone 701, the slip support 703 is sleeved on the mandrel 10 and abuts against the upper slips 702, and the stop cap 704 is sleeved on the mandrel 10 and is fixed on the mandrel 10 through threads.
In order to improve the sealing reliability of the control of the annular pressure of the conventional annular packer and reduce the well control risk during the operation of the packer, the annular packer implements the setting of the packer through annular pressurization, the packer adopts a compression type rubber cylinder, a group of slips are respectively arranged above and below the rubber cylinder, the pressure in the upper direction and the lower direction of the rubber cylinder can be responded, when the packer is recovered, a pipe column is lifted upwards, a mandrel of the annular protection packer is moved upwards, a deblocking pin is cut off, a pressure circulation hole on the mandrel is separated from the sealing of an inner sealing ring of a lower joint, the communication between an oil pipe and the annular space of a sleeve can be realized, the trapping pressure possibly existing at the lower part of the rubber cylinder is balanced, and the well control risk is further reduced.
The annular space protection packer inserts the tubular column and transfers to design the degree of depth in the pit following the water injection after, directly carries out annular space pump income liquid and carries out annular space pressurization, liquid gets into the inside of two pneumatic cylinders through the outside feed liquor hole of first pneumatic cylinder and second pneumatic cylinder, under the effect of pressure, the second pneumatic cylinder moves down the extrusion packing element subassembly and slips subassembly down, make down the final effect of slips on the casing wall, the packing element receives extrusion deformation to act on the casing wall, seal the annular space between annular space packer and the sleeve pipe. Meanwhile, the first hydraulic cylinder moves upwards under the action of pressure to extrude the upper slip assembly, so that the upper slip finally acts on the wall of the casing, and the reaction force generated by the upper slip, the lower slip and the rubber cylinder is finally locked on the piston by the locking block which can only move on the piston in a one-way mode, so that the packer keeps a setting state under the condition of losing annular pressure.
This annular protection packer is provided with the two-stage pneumatic cylinder, can accomplish the setting of packer under lower pressure, because setting pressure is lower, so annular protection packer well control risk when implementing the setting operation is low.
This annular space protection packer packing element adopts three block type designs, includes packing element in the middle of two side packing elements and one, and the hardness of two side packing elements is higher than the hardness of middle packing element, and middle packing element produces deformation more easily when packer packing element extrusion is bloated to seal, and middle packing element plays main sealing function. Two side packing element hardness are higher than middle packing element and when the packing element bore high pressure, middle packing element extrusion side packing element can make the side packing element further produce the deformation laminating on the casing wall, plays and prevents protruding effect, makes sealed more reliable.
When the annular protection packer is recycled, the tubular column is directly lifted, the core shaft moves upwards along with the tubular column after a deblocking pin between the core shaft and the lower joint is cut off, the circulating hole between the two sealing rings in the lower joint on the core shaft is exposed, at the moment, annular communication between the oil pipe and the sleeve pipe releases pressure possibly trapped on the lower part of the rubber sleeve of the annular protection packer, and well control risks when the annular protection packer is recycled are reduced. And continuously lifting the pipe column, and sequentially recovering the components such as the upper slip, the rubber cylinder, the lower slip and the like.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, particular embodiments, but rather to those skilled in the art, having the benefit of the teachings of the present invention, which is capable of numerous modifications and alternative forms, and will be readily apparent to those skilled in the art, and it is not intended to limit the invention to the details shown and described without departing from the general concepts defined by the appended claims and their equivalents.
Claims (6)
1. An annular space protection packer is characterized in that,
the hydraulic cylinder assembly comprises a detachable mandrel, and a lower slip assembly, a rubber cylinder assembly, a second-stage hydraulic cylinder assembly, a locking assembly, a first-stage hydraulic cylinder assembly and an upper slip assembly which are sequentially sleeved on the mandrel;
the cover is established the spindle is epaxial slip subassembly down, it has four groups of slips in proper order and supports and lean on the lower clutch in slip one end down, the lower clutch with the spindle is fixed through the deblocking pin.
2. The annular protection packer of claim 1, wherein the packing element assembly comprises:
the rubber cylinder mandrel is sleeved and fixed on the mandrel; the other ends of the four groups of slips are propped against the rubber cylinder mandrel;
the middle rubber cylinder is positioned in the middle of the rubber cylinder mandrel, and the two side rubber cylinders are respectively positioned on two sides of the middle rubber cylinder;
the two spacer rings are respectively arranged in front of the middle rubber cylinder and the side rubber cylinders;
the connecting body is fixed on the right side of the rubber barrel in an abutting mode;
and the shearing pin fixes the connecting body on the rubber cylinder mandrel.
3. The annular protection packer of claim 1 or 2,
the second stage hydraulic cylinder includes:
the second hydraulic cylinder is sleeved and fixed on the mandrel;
a second seal against the second hydraulic cylinder;
a snap ring securing the second seal body to the mandrel.
4. The annular protection packer of claim 1 or 2,
the locking assembly includes:
the piston is sleeved on the mandrel; the baffle ring is sleeved on the piston, and the shear pin fixes the baffle ring on the piston;
a locking block sleeve, part of the inner surface of which is an inclined surface;
the locking block is sleeved on the piston, and the outer surface of the locking block is an inclined surface;
wherein, the inclined plane of locking piece and the interior inclined plane cooperation of locking piece sleeve.
5. The annular protection packer of claim 1 or 2,
the first stage hydraulic cylinder assembly includes:
first pneumatic cylinder cover is established at the dabber, and first seal sets up between first pneumatic cylinder and dabber, and two snap rings are located first seal both sides respectively, fixed seal.
6. The annular protection packer of claim 1 or 2,
the upper slip assembly includes: the cone is sleeved on the mandrel, the four upper slips are arranged on the outer periphery of the mandrel and abut against the cone, the slip support is sleeved on the mandrel and abuts against the upper slips, and the blocking cap is sleeved on the mandrel and is fixed on the mandrel through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221745662.8U CN217813392U (en) | 2022-07-08 | 2022-07-08 | Annulus protection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221745662.8U CN217813392U (en) | 2022-07-08 | 2022-07-08 | Annulus protection packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217813392U true CN217813392U (en) | 2022-11-15 |
Family
ID=83961842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221745662.8U Active CN217813392U (en) | 2022-07-08 | 2022-07-08 | Annulus protection packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217813392U (en) |
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2022
- 2022-07-08 CN CN202221745662.8U patent/CN217813392U/en active Active
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