CN112780215A - Packer - Google Patents
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- Publication number
- CN112780215A CN112780215A CN202011624075.9A CN202011624075A CN112780215A CN 112780215 A CN112780215 A CN 112780215A CN 202011624075 A CN202011624075 A CN 202011624075A CN 112780215 A CN112780215 A CN 112780215A
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- Prior art keywords
- valve
- hole
- cylinder body
- valve hole
- block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000011324 bead Substances 0.000 claims abstract description 3
- 230000009471 action Effects 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
- E21B34/102—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with means for locking the closing element in open or closed position
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a packer, which comprises a cylinder body, wherein a channel which penetrates through the cylinder body up and down is arranged in the cylinder body, and a control oil port is arranged at the upper end of the cylinder body; the upper end of the cylinder body is fixedly provided with an upper connecting sleeve, the lower end of the cylinder body is fixedly provided with a lower connecting sleeve, the outer side of the cylinder body is sleeved with a rubber cylinder, and the upper end and the lower end of the rubber cylinder are respectively fixedly connected with the upper connecting sleeve and the lower connecting sleeve; an upper valve hole and a lower valve hole are arranged in the side wall of the cylinder body, and a circular bead is formed between the upper valve hole and the lower valve hole; a piston body is connected in the lower valve hole in a sliding manner, a piston rod is arranged at the upper end of the piston body, and an inverted cone-shaped valve core is arranged at the upper end of the piston rod; a valve block is connected in the upper valve hole in a sliding manner, and an upper valve cavity is formed in the upper valve hole; a first spring is arranged between the valve core and the valve block, and a second spring is arranged between the valve block and the shoulder; the valve block is provided with a valve lock assembly; the packer is simple and convenient to control, and working time is saved.
Description
Technical Field
The invention belongs to the field of oilfield development tools, and particularly relates to a packer.
Background
The packer belongs to common equipment in the field of petroleum drilling, cementing and well completion engineering, and is used for packing an annulus between a tubular column and a borehole or between the tubular column and a casing pipe so as to prevent fluid in the annulus from flowing up and down and ensure that subsequent processes can be smoothly carried out. At present, the existing packer has various types and different functions, and almost has larger packing capacity. However, the following problems arise in the prior art packer during operation:
1. the steps of controlling the sealing and unsealing are complicated, the operation is troublesome, the workload is large, and the working time is long;
2. packers cannot be set multiple times in a well, for example hydraulic packers use hydraulic cylinders to squeeze a sealing material to achieve setting. During the seating process, the sealing material expands; and when unsealing, the lifting pipe column unlocks the lock ring. In order to prevent the half-way setting before setting, pins are used for fixing, and the pins are cut short during setting, so that the operation process is irreversible. Even if some packers can realize setting for many times, but have the difficult condition of controlling of setting force, this often causes the sleeve pipe to warp or the wall of a well damages, buries down hidden danger for next operation.
Disclosure of Invention
The invention aims to provide a packer which is simple and convenient to control and saves working time.
In order to achieve the purpose, the invention provides the following technical scheme: a packer comprises a cylinder body, wherein a channel which penetrates through the cylinder body up and down is arranged in the cylinder body, and a control oil port is arranged at the upper end of the cylinder body; the upper end of the cylinder body is fixedly provided with an upper connecting sleeve, the lower end of the cylinder body is fixedly provided with a lower connecting sleeve, the outer side of the cylinder body is sleeved with a rubber cylinder capable of expanding and retracting, the upper end and the lower end of the rubber cylinder are respectively fixedly connected with the upper connecting sleeve and the lower connecting sleeve, and an expansion cavity is formed between the rubber cylinder and the outer side of the cylinder body; an upper valve hole communicated with the channel is formed in the side wall of the cylinder body, a lower valve hole communicated with the expansion cavity is formed in the lower end of the upper valve hole in the side wall of the cylinder body, the upper valve hole and the upper valve hole of the lower valve hole are coaxial and communicated, and a circular bead is formed between the upper valve hole and the lower valve hole; a piston body is connected in the lower valve hole in a sliding manner, a piston rod is arranged at the upper end of the piston body, an inverted cone-shaped valve core is arranged at the upper end of the piston rod, and the valve core is positioned in the upper valve hole and is used for controlling the connection or disconnection of the lower valve hole and the upper valve hole; a valve block is connected in the upper valve hole in a sliding manner, and an upper valve cavity communicated with the control oil port is formed between the valve block and the upper end of the upper valve hole in the upper valve hole; a first spring is arranged between the valve core and the valve block, and a second spring is arranged between the valve block and the shoulder; the valve block is provided with a valve lock assembly, when the valve block is sealed, the valve lock assembly is firstly connected with the valve core and drives the valve core to open the upper end opening of the lower valve hole and continuously pressurize the channel, when the pressure reaches a first set value, the valve lock assembly is separated from the valve core, and the valve core is pressed tightly at the upper end of the lower valve hole under the action of a first spring; when the deblocking, pressurize to the control hydraulic fluid port earlier, when pressure reached the second setting value, the valve piece drove the valve lock subassembly and is connected with the case downwards, and the pressure release of control hydraulic fluid port is then, and the valve piece drives the upper end opening of case down valve hole through the valve lock subassembly and opens under first spring and second spring action.
Further, the valve lock subassembly includes the connecting block, the lower extreme downwardly extending of valve piece is equipped with the flange, the connecting block passes through the articulated shaft and rotates the lower extreme of connecting at the flange, the upper end of case is equipped with the latch hook that is the T font, the outside of connecting block is equipped with the locked groove, be equipped with locating component in the valve piece, when the connecting block changes to locking position, the latch hook is located the locked groove, just locating component fixes a position the connecting block in locking position, when the connecting block changes to unlocking position, the latch hook breaks away from the locked groove, just locating component fixes a position the connecting block in unlocking position.
Furthermore, the positioning assembly comprises a small piston, a valve groove is formed in the valve block, the small piston is connected in the valve groove in a sliding mode, a positioning rod extending out of the valve block is arranged at the lower end of the small piston in a downward extending mode, a rodless cavity is formed between the small piston and the upper end of the valve groove in the valve groove, a rod cavity is formed between the small piston and the lower end of the valve groove, the rodless cavity is communicated with the upper valve cavity, the rod cavity is communicated with the channel, and a third spring used for forcing the small piston to move downwards is arranged in the rodless cavity; the outside of connecting block is equipped with first constant head tank and second constant head tank, when the connecting block changes to the locking position, the locating lever inserts in the first constant head tank, when the connecting block changes to the unblock position, the locating lever inserts in the second constant head tank.
Furthermore, a first through hole used for communicating the upper valve cavity with the rodless cavity and a second through hole used for communicating the upper valve hole with the rod cavity are formed in the valve block.
Furthermore, a third through hole used for communicating the control oil port and the upper valve cavity, a fourth through hole used for communicating the expansion cavity and the lower valve hole and a fifth through hole used for communicating the channel and the upper valve hole are formed in the cylinder body.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the valve core is used for controlling the seat sealing and the unsealing, the control is simple and convenient, and the working time is saved;
2. the seat seal is controlled by the pressure rise in the channel, and the oil port pressure is controlled for unsealing, so that the control is simple, and the working processes of seat seal and unsealing can be clearly distinguished;
3. the valve core is in an inverted cone shape, and a linear seal is formed between the valve core and the upper end opening of the corresponding lower valve hole, so that the pressure in the expansion cavity is prevented from leaking during seat sealing, and the seat sealing effect is ensured; when the seal is not sealed, the seal can be opened quickly, so that the effects of quick seal setting and decompression are realized;
4. the packer can meet the working requirements of setting and unsetting for many times, the setting pressure and the unsetting pressure are reliable, and midway setting and midway unsetting cannot occur.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is an enlarged view taken at I in FIG. 1;
FIG. 3 is a cross-sectional view of a connector block of the present invention;
FIG. 4 is a cross-sectional view of the invention with seating completed;
fig. 5 is an enlarged view at II in fig. 2.
Detailed Description
Referring to fig. 1-5, a packer comprises a cylinder body 2, wherein a channel 2a is arranged in the cylinder body 2 and penetrates up and down, and a control oil port L is arranged at the upper end of the cylinder body 2; an upper connecting sleeve 1b is fixedly arranged at the upper end of the cylinder body 2, a lower connecting sleeve 1b1 is fixedly arranged at the lower end of the cylinder body 2, a rubber cylinder 3 capable of expanding and retracting is sleeved on the outer side of the cylinder body 2, the upper end and the lower end of the rubber cylinder 3 are respectively and fixedly connected with the upper connecting sleeve 1b and the lower connecting sleeve 1b1, and an expansion cavity 3a is formed between the rubber cylinder 3 and the outer side of the cylinder body 2; an upper valve hole 21 communicated with the channel 2a is arranged in the side wall of the cylinder body 2, a lower valve hole 22 communicated with the expansion cavity 3a is arranged at the lower end of the upper valve hole 21 in the side wall of the cylinder body 2, the upper valve hole 21 is coaxial and communicated with the lower valve hole 22, and a shoulder 23 is formed between the upper valve hole 21 and the lower valve hole 22; a piston body 6 is connected in the lower valve hole 22 in a sliding manner, a piston rod 61 is arranged at the upper end of the piston body 6, an inverted cone-shaped valve core 62 is arranged at the upper end of the piston rod 61, and the valve core 62 is positioned in the upper valve hole 21 and is used for controlling the connection or disconnection of the lower valve hole 22 and the upper valve hole 21; the upper valve hole 21 is internally and slidably connected with a valve block 4, and an upper valve cavity 4c communicated with the control oil port L is formed between the valve block 4 and the upper end of the upper valve hole 21 in the upper valve hole 21; a first compressed spring 8 is arranged between the valve core 62 and the valve block 4, and a second compressed spring 9 is arranged between the valve block 4 and the shoulder 23; a third through hole 2d for communicating the control oil port L with the upper valve cavity 4c, a fourth through hole 2b for communicating the expansion cavity 3a with the lower valve hole 22, and a fifth through hole 2c for communicating the channel 2a with the upper valve hole 21 are formed in the cylinder body 2; the valve block 4 is provided with a valve lock component, when the valve block is sealed, the valve lock component is firstly connected with the valve core 62 and drives the valve core 62 to open the upper end opening of the lower valve hole 22 and continuously pressurize the channel 2a, when the pressure reaches a first set value, the valve lock component is separated from the valve core 62, and the valve core 62 is tightly pressed at the upper end of the lower valve hole 22 under the action of the first spring 8; when the valve is unsealed, the control oil port L is pressurized, when the pressure reaches a second set value, the valve block 4 drives the valve lock assembly to be connected with the valve core 62 downwards, then the control oil port L is depressurized, and the valve block 4 drives the valve core 62 to open the upper end opening of the lower valve hole 22 through the valve lock assembly under the action of the first spring 8 and the second spring 9.
The valve lock subassembly includes connecting block 7, the lower extreme downwardly extending of valve piece 4 is equipped with flange 41, connecting block 7 passes through articulated shaft 42 and rotates the lower extreme of connecting at flange 41, the upper end of case 62 is equipped with latch hook 6a that is the T font, the outside of connecting block 7 is equipped with locked groove 7a, be equipped with locating component in the valve piece 4, when connecting block 7 changes to locking position, latch hook 6a is located locked groove 7a, just locating component fixes a position connecting block 7 in locking position, when connecting block 7 changes to unlocking position, latch hook 6a breaks away from locked groove 7a, just locating component fixes a position connecting block 7 in unlocking position.
The positioning assembly comprises a small piston 5, a valve groove 43 is arranged in the valve block 4, the small piston 5 is connected in the valve groove 43 in a sliding manner, a positioning rod extending out of the valve block 4 is arranged at the lower end of the small piston 5 in a downward extending manner, a rodless cavity 5a is formed between the small piston 5 and the upper end of the valve groove 43 in the valve groove 43, a rod cavity 5b is formed between the small piston 5 and the lower end of the valve groove 43, the rodless cavity 5a is communicated with an upper valve cavity 4c, the rod cavity 5b is communicated with a channel 2a, and a third spring 10 for forcing the small piston 5 to move downwards is arranged in the rodless cavity 5 a; the outside of connecting block 7 is equipped with first constant head tank 7c and second constant head tank 7d, when connecting block 7 changes to the locking position, the locating lever inserts in first constant head tank 7c, when connecting block 7 changes to the unblock position, the locating lever inserts in second constant head tank 7 d. The valve block 4 is internally provided with a first through hole 4b for communicating the upper valve chamber 4c with the rodless chamber 5a, and a second through hole 4a for communicating the upper valve hole 21 with the rod chamber 5 b.
When the invention is used, the channel 2a is communicated with pumping pressure equipment on the ground, and the control oil port L is communicated with external control pumping pressure equipment on the ground.
As shown in figure 1, before working, the packer needs to be connected with a pipeline, then the packer is put into a well, when the packer is put to a required depth, a pumping device is used for pressurizing the channel 2a, liquid enters the expansion cavity 3a from the channel 2a, the fifth through hole 2c, the upper valve hole 21, the lower valve hole 22 and the fourth through hole 2b, so that the expansion cavity 3a is filled with the liquid, the rubber barrel 3 starts to expand outwards, when a certain pressure is reached, the liquid in the channel 2a enters the rod cavity 5b through the fifth through hole 2c, the upper valve hole 21 and the second through hole 4a and acts on the lower part of the small piston 5, the small piston 5 is pushed to move upwards to overcome the third spring 10, so as to drive the positioning rod to be separated from the first positioning groove 7c, at the moment, the connecting block 7 is not positioned again, the first spring 8 pushes the valve core 62 to move downwards, the connecting block 6a drives the connecting block 7 to rotate through the locking groove 7a, so that the second positioning groove 7, the upper end opening of the upper valve hole 21 is closed, so that the expansion cavity 3a realizes pressure maintaining (as shown in fig. 4), the pressure of the pumping equipment is reduced, the pressure in the channel 2a is reduced, and the third spring 10 pushes the small piston 5 to enable the positioning rod to be propped against the second positioning groove 7d, so that the seat sealing is completed. The opening pressure at the time of setting can be controlled by the third spring 10, and therefore, halfway setting can be prevented.
When the unsealing is needed, the control oil port L is pressurized through an external control pump pressure device, at the moment, liquid enters the upper valve cavity 4c through the third through hole 2d and acts on the valve block 4, the valve block 4 is pushed to move downwards by overcoming the first spring 8 and the second spring 9, the lock hook 6a is contacted with the upper side wall 7b of the lock groove 7a and is matched with the lock groove 7a to drive the connecting block 7 to rotate, when the connecting block 7 rotates to the first positioning groove 7c and the positioning rod is aligned, the third spring 10 pushes the small piston 5 downwards to enable the positioning rod to enter the first positioning groove 7c to position the connecting block 7, the external control pump pressure equipment stops the pressure supply and pressure reduction, the second spring 9 pushes the valve block 4 to move upwards, due to the action of the connecting block 7, the valve core 62 also rises, the upper end opening of the upper valve hole 21 is opened, and the liquid in the expansion cavity 3a is squeezed into the channel 2a, so that the unsealing is realized and the circulation is realized. The unsealing pressure is controlled by the first spring 8 and the second spring 9, so that reliable sealing can be guaranteed, and midway unsealing cannot occur. The invention can complete multiple sealing and unsealing and has simple operation.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A packer comprises a cylinder body and is characterized in that a channel which penetrates through the cylinder body from top to bottom is arranged in the cylinder body, and a control oil port is arranged at the upper end of the cylinder body; the upper end of the cylinder body is fixedly provided with an upper connecting sleeve, the lower end of the cylinder body is fixedly provided with a lower connecting sleeve, the outer side of the cylinder body is sleeved with a rubber cylinder capable of expanding and retracting, the upper end and the lower end of the rubber cylinder are respectively fixedly connected with the upper connecting sleeve and the lower connecting sleeve, and an expansion cavity is formed between the rubber cylinder and the outer side of the cylinder body; an upper valve hole communicated with the channel is formed in the side wall of the cylinder body, a lower valve hole communicated with the expansion cavity is formed in the lower end of the upper valve hole in the side wall of the cylinder body, the upper valve hole and the upper valve hole of the lower valve hole are coaxial and communicated, and a circular bead is formed between the upper valve hole and the lower valve hole; a piston body is connected in the lower valve hole in a sliding manner, a piston rod is arranged at the upper end of the piston body, an inverted cone-shaped valve core is arranged at the upper end of the piston rod, and the valve core is positioned in the upper valve hole and is used for controlling the connection or disconnection of the lower valve hole and the upper valve hole; a valve block is connected in the upper valve hole in a sliding manner, and an upper valve cavity communicated with the control oil port is formed between the valve block and the upper end of the upper valve hole in the upper valve hole; a first spring is arranged between the valve core and the valve block, and a second spring is arranged between the valve block and the shoulder; the valve block is provided with a valve lock assembly, when the valve block is sealed, the valve lock assembly is firstly connected with the valve core and drives the valve core to open the upper end opening of the lower valve hole and continuously pressurize the channel, when the pressure reaches a first set value, the valve lock assembly is separated from the valve core, and the valve core is pressed tightly at the upper end of the lower valve hole under the action of a first spring; when the deblocking, pressurize to the control hydraulic fluid port earlier, when pressure reached the second setting value, the valve piece drove the valve lock subassembly and is connected with the case downwards, and the pressure release of control hydraulic fluid port is then, and the valve piece drives the upper end opening of case down valve hole through the valve lock subassembly and opens under first spring and second spring action.
2. The packer of claim 1, wherein the valve lock assembly comprises a connecting block, a convex plate is arranged at the lower end of the valve block in a downward extending mode, the connecting block is rotatably connected to the lower end of the convex plate through a hinge shaft, a T-shaped locking hook is arranged at the upper end of the valve element, a locking groove is formed in the outer side of the connecting block, a positioning assembly is arranged in the valve block, the locking hook is located in the locking groove when the connecting block is rotated to the locking position, the positioning assembly positions the connecting block at the locking position, the locking hook is separated from the locking groove when the connecting block is rotated to the unlocking position, and the positioning assembly positions the connecting block at the unlocking position.
3. The packer of claim 2, wherein the positioning assembly comprises a small piston, a valve groove is formed in the valve block, the small piston is slidably connected in the valve groove, a positioning rod extending out of the valve block extends downwards from the lower end of the small piston, a rodless cavity is formed in the valve groove between the small piston and the upper end of the valve groove, a rod cavity is formed between the small piston and the lower end of the valve groove, the rodless cavity is communicated with the upper valve cavity, the rod cavity is communicated with the passage, and a third spring for forcing the small piston to move downwards is arranged in the rodless cavity; the outside of connecting block is equipped with first constant head tank and second constant head tank, when the connecting block changes to the locking position, the locating lever inserts in the first constant head tank, when the connecting block changes to the unblock position, the locating lever inserts in the second constant head tank.
4. A packer as claimed in claim 3, in which the valve block has a first through-hole therein for communicating the upper valve chamber with the rodless chamber, and a second through-hole therein for communicating the upper valve chamber with the rod chamber.
5. The packer of claim 1, wherein a third through hole for communicating the control oil port with the upper valve chamber, a fourth through hole for communicating the expansion chamber with the lower valve hole, and a fifth through hole for communicating the passage with the upper valve hole are provided in the cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011624075.9A CN112780215A (en) | 2020-12-30 | 2020-12-30 | Packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011624075.9A CN112780215A (en) | 2020-12-30 | 2020-12-30 | Packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112780215A true CN112780215A (en) | 2021-05-11 |
Family
ID=75754439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011624075.9A Pending CN112780215A (en) | 2020-12-30 | 2020-12-30 | Packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112780215A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216892A (en) * | 2021-05-27 | 2021-08-06 | 亓桂景 | Downhole packer |
-
2020
- 2020-12-30 CN CN202011624075.9A patent/CN112780215A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216892A (en) * | 2021-05-27 | 2021-08-06 | 亓桂景 | Downhole packer |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210511 |
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| WD01 | Invention patent application deemed withdrawn after publication |