CN213235012U - Pressure test plugging device - Google Patents
Pressure test plugging device Download PDFInfo
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- CN213235012U CN213235012U CN202022109736.6U CN202022109736U CN213235012U CN 213235012 U CN213235012 U CN 213235012U CN 202022109736 U CN202022109736 U CN 202022109736U CN 213235012 U CN213235012 U CN 213235012U
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Abstract
The utility model provides a pressure test plugging device, which comprises an upper joint, a mandrel, a lower joint and a rubber cylinder, wherein the stepped diameter of the lower end of the mandrel is matched with the stepped diameter of the inner wall of the lower joint, the stepped diameter of the upper end of the mandrel is matched with the aperture of the lower end of the upper joint, the upper end and the lower end of the mandrel are respectively provided with holes along the axial line, the mandrel is provided with a lower hole close to the shaft shoulder with the largest radius, the side wall of the hole of the upper end of the, the lower end surface of the upper joint is provided with a floating piston which is sleeved on the outer wall of the mandrel, the outer side of the floating piston is sleeved with a pressure-bearing sleeve, the upper end of the pressure-bearing sleeve is sleeved on the lower end of the upper joint and the outer side of the floating piston, the lower end of the pressure-bearing sleeve abuts against the lower end surface of the floating piston, the outer side of the concave part at the lower end of the pressure-bearing sleeve is sleeved with a sleeve pressure isolating, the sleeve pressure isolation sleeve is provided with an isolation sleeve pressure hole below the maximum shaft diameter of the mandrel, the lower end of the sleeve pressure isolation sleeve is provided with a rubber cylinder, and the lower end of the rubber cylinder is connected with a lower joint. The beneficial effects of the utility model are that avoid the jamming, prevent to lift the suction.
Description
Technical Field
The utility model belongs to the field of machinery, especially, relate to a pressure testing plugging device.
Background
When the existing oil and gas field is operated underground, pressure testing must be carried out on the connection part of a replaced wellhead device, the existing common method is to utilize an inverted leather cup type plugging device to plug a sleeve, the sleeve plugging device of the type has the advantage of convenience in field use, and the phenomenon of clamping stagnation easily occurs when the drilling tool is pulled out for the sleeve device which is large in inner diameter and complex in upper well structure of the plugging tool. Another disadvantage is the suction phenomenon in the casing during the start of drilling, with potential safety hazards.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an avoid the jamming, prevent to lift the pressure testing plugging device of suction, the wellhead assembly who especially is fit for changing carries out pressure testing and shutoff work.
The technical scheme of the utility model is that: a pressure test plugging device comprises an upper connector, a mandrel, a lower connector and a rubber cylinder, wherein the upper connector is a hollow cylinder, the outer surface of the lower end part of the upper connector is provided with a concave ladder, the inner wall of the upper end of the upper connector is arranged in a funnel shape, the outer wall of the lower end of the upper connector is provided with a sawtooth groove, the outer wall of the lower connector is arranged in a second-stage ladder shape, the inner wall of the upper end of the lower connector is arranged in a second-stage ladder shape, the mandrel is a stepped shaft, the shaft surface with the largest radius of the mandrel is provided with the sawtooth groove, the stepped diameter of the lower end of the mandrel is matched with the stepped diameter of the inner wall of the lower connector, the ladder of the upper end of the mandrel is matched with the aperture of the lower end of the upper connector, the upper end and the lower end of the mandrel are respectively provided with holes along the axial line, the upper hole of the mandrel is a through hole, the lower end surface of the upper joint is provided with a floating piston, the floating piston is sleeved on the outer wall of the mandrel, two surfaces of the floating piston are both provided with sawtooth-shaped grooves, the upper end of the inner side of the floating piston is provided with an annular notch, the lower end of the outer side of the floating piston is provided with an annular notch, the upper hole of the mandrel is communicated with the annular notch of the inner side of the floating piston and the hole of the upper end of the mandrel, the outer side of the floating piston is sleeved with a pressure bearing sleeve which is a hollow cylindrical tube, the upper end of the pressure bearing sleeve is sleeved on the lower end of the upper joint and the outer side of the floating piston, the lower end of the pressure bearing sleeve is inwards concave, the lower end of the pressure bearing sleeve abuts against the lower end surface of the floating piston, the lower end of the pressure bearing sleeve is sleeved on the outer, the outer wall of the maximum shaft diameter of the mandrel is sleeved with the inner wall of the sleeve pressure isolation sleeve, the outer side wall of the mandrel is sleeved with the sleeve pressure isolation sleeve which is located below the maximum shaft diameter of the mandrel, the inner wall of one end of the sleeve pressure isolation sleeve which is located below the maximum shaft diameter of the mandrel is provided with a sawtooth-shaped groove, the sleeve pressure isolation sleeve is located below the maximum shaft diameter of the mandrel and is provided with an isolation sleeve pressure hole, the lower end of the sleeve pressure isolation sleeve is provided with a rubber tube, and the lower end of the rubber tube is connected with a lower joint.
Furthermore, a sealing ring is arranged in the sawtooth-shaped groove.
Furthermore, transition fit is adopted between the pressure bearing sleeve and the mandrel, transition fit is adopted between the floating piston and the mandrel, and transition fit is adopted between the sleeve pressure isolating sleeve and the mandrel.
Furthermore, an interference fit is adopted between the rubber cylinder and the mandrel.
Furthermore, transition fit is adopted between the upper joint and the mandrel, and transition fit is adopted between the lower joint and the mandrel.
The utility model has the advantages and positive effects that:
1. because the floating piston is adopted to be matched with the pressure bearing sleeve and the sleeve pressure isolation sleeve to apply pressure, hydraulic pressure in the pipe is converted into seat seal pressure, the hydraulic pressure can be fully utilized, the plugging work can be carried out as long as the hydraulic pressure is in use, and normal taking out can be ensured only by withdrawing the pressure, so that the device can be suitable for the conditions that the inner diameter of the casing pipe is large and the well structure on the upper part of the plugging structure is complex.
2. Because the pressure-bearing sleeve is matched with the sleeve pressure isolation sleeve for plugging, in the process of pressure testing, the external overlarge pressure can increase the plugging effect, the firmness of plugging can not be influenced, the clamping stagnation and the suction phenomenon can not occur, and the plugging effect can be effectively ensured.
3. Because the intraductal hydraulic pressure carries out the shutoff, as long as pressure just can guarantee that the shutoff is firm, can also adjust the shutoff effect of plugging device through regulating pressure, only need withdraw hydraulic pressure simultaneously and just can relax take out the plugging device, deblocking and shutoff work are very convenient.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
fig. 2 is a schematic view of the seating of the present invention;
fig. 3 is a schematic diagram of the pressure detection of the present invention.
In the figure:
1. upper connector 2, mandrel 3 and pressure-bearing sleeve
4. Floating piston 5, sleeve pressure isolation sleeve 6 and rubber cylinder
7. Lower joint 8, sleeve 2-1 and upper hole of mandrel
2-2 parts of mandrel lower hole 3-1 parts of piston pressure hole 5-1 parts of isolation sleeve pressure hole
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-3:
a pressure test plugging device comprises an upper connector 1, a mandrel 2, a lower connector 7 and a rubber cylinder 6, wherein the upper connector 1 is a hollow cylinder, the outer surface of the lower end part of the upper connector 1 is provided with a concave ladder, the inner wall of the upper end of the upper connector 1 is arranged in a funnel shape, the outer wall of the lower end of the upper connector 1 is provided with a sawtooth-shaped groove, the outer wall of the lower end of the lower connector 7 is arranged in a second-stage ladder shape, the inner wall of the upper end of the lower connector 7 is arranged in a second-stage ladder shape, the mandrel 2 is a ladder shaft, the shaft surface with the largest radius of the mandrel 2 is provided with the sawtooth-shaped groove, the ladder diameter of the lower end of the mandrel 2 is matched with the ladder diameter of the inner wall of the lower connector 7, the ladder of the upper end of the mandrel 2 is matched with the aperture of the lower end of the upper connector 1, the upper end and the, the lower hole 2-2 of the mandrel is communicated with the hole at the lower end of the mandrel 2, the side wall of the hole at the upper end of the mandrel 2 is provided with an upper hole 2-1 of the mandrel, the upper hole 2-1 of the mandrel is a through hole, the lower end surface of the upper joint 1 is provided with a floating piston 4, the floating piston 4 is sleeved on the outer wall of the mandrel 2, two sides of the floating piston 4 are both provided with sawtooth-shaped grooves, the upper end of the inner side of the floating piston 4 is provided with an annular gap, the lower end of the outer side of the floating piston 4 is provided with an annular gap, the upper hole 2-1 of the mandrel is communicated with the annular gap at the inner side of the floating piston 4 and the hole at the upper end of the mandrel 2, the outer side of the floating piston 4 is sleeved with a pressure bearing sleeve 3, the pressure bearing sleeve 3 is a hollow cylinder, the upper end of the pressure bearing sleeve 3 is sleeved on, the inner and outer sides of the end of the pressure bearing sleeve 3 are both provided with rectangular sawtooth grooves, the lower end of the pressure bearing sleeve 3, which is positioned at the outer side of the floating piston 4, is provided with a piston pressure hole 3-1, the piston pressure hole 3-1 is a through hole, the piston pressure hole 3-1 is connected with an annular notch at the outer side of the lower end of the floating piston 4, the outer side of the concave part at the lower end of the pressure bearing sleeve 3 is sleeved with a sleeve pressure isolation sleeve 5, the inner wall of the sleeve pressure isolation sleeve 5, which is positioned at the outer wall of the maximum shaft diameter of the mandrel 2, is sleeved at the outer side wall of the mandrel 2, the inner wall of the sleeve pressure isolation sleeve 5, which is positioned at one end of the maximum shaft diameter of the mandrel, is provided with sawtooth grooves, the lower end of the sleeve pressure isolation sleeve 5, which is positioned at the lower part of the maximum shaft diameter of the mandrel 2, is provided with an isolation sleeve.
And a sealing ring is arranged in the sawtooth-shaped groove.
Adopt transition fit between bearing sleeve 3 and the dabber 2, adopt transition fit between floating piston 4 and the dabber 2, adopt transition fit between cover pressure spacer sleeve 5 and the dabber 2.
And the rubber cylinder 6 and the mandrel 2 are in interference fit.
Transition fit is adopted between the upper joint 1 and the mandrel 2, and transition fit is adopted between the lower joint 7 and the mandrel 2.
The working process of the example is as follows:
in the use, the plugging device is placed at a designated position in a well through the sleeve 8, the plugging device is pressurized through the upper connector 1 after reaching the designated position, after seat sealing pressure is injected, liquid pressure enters the annular gap of the floating piston 4 through the hole 2-1 on the mandrel, the annular gap applies pressure to push the floating piston 4 to move downwards, the floating piston 4 pushes the pressure bearing sleeve 3 to move downwards, the pressure bearing sleeve 3 pushes the sleeve pressure isolating sleeve 5 to move downwards, the sleeve pressure isolating sleeve 5 extrudes the rubber cylinder 6, the diameter of the rubber cylinder 6 is increased after being extruded and deformed, and plugging work is completed after the rubber cylinder 6 is contacted with the sleeve 8.
When pressure testing is carried out, after the plugging device completes plugging work, detection pressure is applied to the sleeve 8, when the detection pressure is greater than seat sealing pressure, upward pressure is applied to the floating piston 4 through the piston pressure hole 3-1, the floating piston 4 moves upwards due to the fact that the upward force is greater than the downward force, the pressure-bearing sleeve 3 and the sleeve pressure isolation sleeve 5 still apply seat sealing pressure to the rubber cylinder 6 below under the action of the detection pressure, meanwhile, the detection pressure independently applies seat sealing force to the sleeve pressure isolation sleeve 5 through the isolation sleeve pressure hole 5-1, the seat sealing effect is better, and as lower end liquid of a cavity among the sleeve pressure isolation sleeve 5, the pressure-bearing sleeve 3 and the mandrel 2 connected through the mandrel lower hole 2-2 is a low-pressure area, a high-pressure area is arranged above the pressure-bearing sleeve 3, seat sealing force can still be generated to the rubber cylinder under the test pressure, the seat sealing force is larger if the test pressure is larger, effectively guarantee the setting effect in the actual work, only need remove the pressure of plugging device top after the work, the packing element is kick-backed naturally and just can be deblocking by oneself, then just can follow the plugging device of getting rid of in the well smoothly.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (5)
1. A pressure testing plugging device is characterized in that: comprises an upper joint (1), a mandrel (2), a lower joint (7) and a rubber cylinder (6), wherein the upper joint (1) is a hollow cylinder, the outer surface of the lower end part of the upper joint (1) is provided with a concave ladder, the inner wall of the upper end of the upper joint (1) is arranged into a funnel shape, the outer wall of the lower end of the upper joint (1) is provided with a sawtooth-shaped groove, the outer wall of the lower joint (7) is arranged into a secondary ladder shape, the inner wall of the upper end of the lower joint (7) is arranged into a secondary ladder shape, the mandrel (2) is a ladder shaft, the shaft surface with the largest radius of the mandrel (2) is provided with the sawtooth-shaped groove, the ladder diameter of the lower end of the mandrel (2) is matched with the ladder diameter of the inner wall of the lower joint (7), the ladder of the upper end of the mandrel (2) is matched with the aperture of the lower end of the upper joint (1), the upper end and the lower end, the lower hole (2-2) of the mandrel is a through hole, the lower hole (2-2) of the mandrel is communicated with the hole at the lower end of the mandrel (2), the side wall of the hole at the upper end of the mandrel (2) is provided with an upper hole (2-1) of the mandrel, the upper hole (2-1) of the mandrel is a through hole, the lower end surface of the upper joint (1) is provided with a floating piston (4), the floating piston (4) is sleeved on the outer wall of the mandrel (2), both surfaces of the floating piston (4) are provided with sawtooth-shaped grooves, the upper end of the inner side of the floating piston (4) is provided with an annular notch, the lower end of the outer side of the floating piston (4) is provided with an annular notch, the upper hole (2-1) of the mandrel is communicated with the annular notch at the inner side of the floating piston (4) and the hole at the upper end of the mandrel (2), the outer side of the floating piston (4) is sleeved with a pressure bearing sleeve (3, the lower end of the pressure bearing sleeve (3) is concave inwards, the lower end of the pressure bearing sleeve (3) abuts against the lower end face of the floating piston (4), the lower end of the pressure bearing sleeve (3) is sleeved outside the mandrel (2), rectangular sawtooth grooves are formed inside and outside the end of the pressure bearing sleeve (3), a piston pressure hole (3-1) is formed in the lower end of the pressure bearing sleeve (3) positioned outside the floating piston (4), the piston pressure hole (3-1) is a through hole, the piston pressure hole (3-1) is connected with an annular notch in the outer side of the lower end of the floating piston (4), a sleeve pressure isolating sleeve (5) is sleeved outside the concave part at the lower end of the pressure bearing sleeve (3), the inner wall of the sleeve pressure isolating sleeve (5) is sleeved on the outer wall of the maximum axial diameter of the mandrel (2), the sleeve pressure isolating sleeve (5) is positioned below the maximum axial diameter of the mandrel (2) and sleeved on the outer side wall of the mandrel (2), and a sawtooth groove is formed in the inner wall of, the sleeve pressure isolation sleeve (5) is positioned below the maximum shaft diameter of the mandrel (2) and is provided with an isolation sleeve pressure hole (5-1), the lower end of the sleeve pressure isolation sleeve (5) is provided with a rubber cylinder (6), and the lower end of the rubber cylinder (6) is connected with a lower joint (7).
2. The pressure test plugging device of claim 1, wherein: and a sealing ring is arranged in the sawtooth-shaped groove.
3. The pressure test plugging device of claim 1, wherein: adopt transition fit between bearing sleeve (3) and dabber (2), adopt transition fit between floating piston (4) and dabber (2), adopt transition fit between cover pressure isolation cover (5) and dabber (2).
4. The pressure test plugging device of claim 1, wherein: and the rubber cylinder (6) and the mandrel (2) are in interference fit.
5. The pressure test plugging device of claim 1, wherein: transition fit is adopted between the upper joint (1) and the mandrel (2), and transition fit is adopted between the lower joint (7) and the mandrel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022109736.6U CN213235012U (en) | 2020-09-23 | 2020-09-23 | Pressure test plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022109736.6U CN213235012U (en) | 2020-09-23 | 2020-09-23 | Pressure test plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213235012U true CN213235012U (en) | 2021-05-18 |
Family
ID=75875888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022109736.6U Active CN213235012U (en) | 2020-09-23 | 2020-09-23 | Pressure test plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213235012U (en) |
-
2020
- 2020-09-23 CN CN202022109736.6U patent/CN213235012U/en active Active
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