CN219910710U - Drillable sand-flushing cement-extruding bridge plug - Google Patents
Drillable sand-flushing cement-extruding bridge plug Download PDFInfo
- Publication number
- CN219910710U CN219910710U CN202321446900.XU CN202321446900U CN219910710U CN 219910710 U CN219910710 U CN 219910710U CN 202321446900 U CN202321446900 U CN 202321446900U CN 219910710 U CN219910710 U CN 219910710U
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- China
- Prior art keywords
- sleeve
- shear pin
- sand
- lock
- seat
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- 238000011010 flushing procedure Methods 0.000 title abstract description 8
- 239000004576 sand Substances 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 18
- 238000003780 insertion Methods 0.000 claims abstract description 11
- 230000037431 insertion Effects 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims description 17
- 238000012856 packing Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 abstract description 7
- 239000003208 petroleum Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The drillable sand-flushing cement-extruding bridge plug belongs to the field of downhole operation tool technology in petroleum industry. The automatic pressure-release shear pin comprises an insertion pipe, wherein an upper connecting sleeve is connected to the upper portion of the outer portion of the insertion pipe, an upper joint is connected to the upper portion of the upper connecting sleeve, an upper sliding sleeve is connected to the inner side of the upper joint through an upper sliding sleeve shear pin, a main piston is connected to the lower portion of the upper connecting sleeve through a starting shear pin, an auxiliary piston is connected to the outer side of the main piston through a pressure-release shear pin, a lock seat is connected to the middle portion of the insertion pipe, a clamp spring is arranged in the lock seat, a shear pin seat is connected to the lower portion of the lock seat through a releasing shear pin, a rubber sleeve shaft is connected to the lower portion of the shear pin seat, a lock sleeve, a rubber sleeve, an upper cone and a slip are sequentially and movably sleeved outside the rubber sleeve from top to bottom, a pressing sleeve is connected to the outer side of the lower portion of the auxiliary piston, and the lower end of the pressing sleeve corresponds to the upper end of the lock sleeve. The utility model can circularly wash sand, so that the cement extruding tool can normally enter the sand outlet position, and the seat seal is pressed to smoothly finish the cement extruding operation.
Description
Technical Field
The utility model belongs to the technical field of downhole operation tools in petroleum industry, and particularly relates to a drillable sand-washing cement-squeezing bridge plug.
Background
In the production process of the oil-gas-water well, due to the reasons of overlarge production pressure difference, the loosening of sandstone oil-gas reservoir rock Dan Jiaojie and the like, bottom sand flows into a shaft, and sand flows out to cause instability of the shaft, so that the problems of casing fracture, casing damage and the like are caused, and the problems need to be solved by the cementing operation of the lower tool for cementing again. Because sand is produced in the well bore, a sand bridge of hundreds of meters is formed, and conventional tools cannot be normally run in. After the nib is used for flushing sand, when a conventional tool is put into the well, the well with serious sand is filled with the well bore, and the tool cannot be put into the well.
Disclosure of Invention
Aiming at the problems, the utility model overcomes the defects of the prior art and provides a drillable sand-washing cement-squeezing bridge plug; the utility model can circularly wash sand, so that the cement extruding tool can normally enter the sand outlet position, and the seat seal is pressed to smoothly finish the cement extruding operation.
In order to achieve the above purpose, the present utility model adopts the following technical scheme.
The utility model provides a drillable sand-washing cement-extruding bridge plug which is characterized by comprising a cannula, wherein an upper connecting sleeve is connected to the outer upper part of the cannula, an upper connector is connected to the upper part of the upper connecting sleeve, an upper sliding sleeve is connected to the inner side of the upper connector through an upper sliding sleeve shear pin, a main piston is connected to the lower part of the upper connecting sleeve through a starting shear pin, a secondary piston is connected to the outer side of the main piston through a pressure relief shear pin, a lock seat is connected to the middle part of the cannula, a clamp spring is arranged in the lock seat, a shear pin seat is connected to the lower part of the lock seat through a releasing shear pin, a lock sleeve, a rubber cylinder, an upper cone and a lower cone are sequentially and movably sleeved outside the rubber cylinder from top to bottom, a pressing sleeve is connected to the lower part of the secondary piston, the lower end of the pressing sleeve corresponds to the upper end of the lock sleeve, a lock spring is arranged in the lock sleeve, the lower end of the lock sleeve corresponds to the upper end of the rubber cylinder, the upper cone can enter into the lock seat along a conical surface, the lower cone corresponds to the lower cone, and the lower cone is connected to the lower cone, and the lower cone is movably connected to the lower cone.
Further, a cylinder barrel is arranged on the outer side of the lower part of the upper connecting sleeve and the outer side of the middle upper part of the auxiliary piston at the same time, a back cap is connected to the cylinder barrel, the back cap is connected with the upper connecting sleeve, the end part of the cylinder barrel is connected to the upper connecting sleeve by the back cap, and a space is reserved between the cylinder barrel and the upper connecting sleeve.
Further, the lower side is connected with the locking sleeve in the main piston, the locking sleeve seals the upper sealing sleeve between the main piston and the insertion pipe, a gap is reserved between the locking sleeve and the insertion pipe, and the locking sleeve can correspond to the clamp spring.
Further, the sand washing head is of a triangular scraper type structure.
The utility model has the beneficial effects of.
The utility model can be connected with a drill rod, and transmits wellhead torque to the lowest end through torque transmission, and the wellhead torque is circularly washed and then set, sand surfaces are effectively stirred through a sand washing head at the bottom, and a cement squeezing tool can normally enter a sand outlet position to smoothly finish cement squeezing operation in cooperation with well washing sand washing.
Drawings
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description is presented by way of example only and is not intended to limit the utility model.
Fig. 1 is a schematic view of the upper half-section of the present utility model.
Fig. 2 is a schematic of the middle part of the present utility model in a semi-sectional configuration.
Fig. 3 is a schematic view of the lower half-section of the present utility model.
The marks in the figure: 1 is an upper joint, 2 is an upper connecting sleeve, 3 is a back cap, 4 is an upper sliding sleeve, 5 is a cylinder barrel, 6 is a cannula, 7 is a main piston, 8 is a secondary piston, 9 is an upper sealing sleeve, 10 is a locking sleeve, 11 is a lock seat, 12 is a clamp spring, 13 is a pressing sleeve, 14 is a shear pin seat, 15 is a lock pin seat, 16 is a lock spring, 17 is a rubber cylinder shaft 18 is a rubber cylinder, 19 is an upper cone, 20 is a slip, 21 is a lower cone, 22 is a lower sealing sleeve, 23 is a lower connecting sleeve, 24 is a base, 25 is a lower sliding sleeve, 26 is a sand flushing head, 27 is a releasing shear pin, 28 is a pressure release shear pin, 29 is a starting shear pin, 30 is an upper sliding sleeve shear pin, and 31 is a steel ball.
Detailed Description
Referring to fig. 1-3, the upper, middle and lower sections of fig. 1-3 respectively show the drillable sand-washing cement-extruding bridge plug provided by the embodiment, which comprises a cannula 6, wherein the upper part of the outside of the cannula 6 is in threaded connection with an upper connecting sleeve 2, the upper part of the upper connecting sleeve 2 is in threaded connection with an upper joint 1, and the upper joint 1 can be in threaded connection with the lower end of a drill rod so that the drill rod is connected with the bridge plug.
The inner side of the upper joint 1 is connected with an upper sliding sleeve 4 through an upper sliding sleeve shear pin 30, the upper sliding sleeve shear pin 30 is simultaneously fixed on the upper joint 1 and the upper sliding sleeve 4, and after the upper sliding sleeve shear pin 30 is sheared, the upper joint 1 is separated from the upper sliding sleeve 4.
The lower part of the upper connecting sleeve 2 is connected with the main piston 7 through a starting shear pin 29, the starting shear pin 29 is simultaneously fixed on the upper connecting sleeve 2 and the main piston 7, and when the starting shear pin 29 is sheared, the upper connecting sleeve 2 is separated from the main piston 7.
The outside of the main piston 7 is connected with the auxiliary piston 8 through the pressure relief shear pin 28, the pressure relief shear pin 28 is simultaneously fixed on the main piston 7 and the auxiliary piston 8, and when the pressure relief shear pin 28 is sheared, the main piston 7 is separated from the auxiliary piston 8.
The lower side is connected with locking sleeve 10 in the main piston 7, and locking sleeve 10 seals the upper seal cover 9 between main piston 7 and intubate 6, leaves the space between locking sleeve 10 and the intubate 6, and when main piston 7 moved, locking sleeve 10 can follow the motion together.
The lower outer side of the upper connecting sleeve 2 and the upper outer side of the middle upper part of the auxiliary piston 8 are simultaneously provided with a cylinder 5, a back cap 3 is connected to the cylinder 5, the back cap 3 is connected with the upper connecting sleeve 2, the end part of the cylinder 5 is connected to the upper connecting sleeve 2 by the back cap 3, and a space is reserved between the cylinder 5 and the upper connecting sleeve 2.
The middle part threaded connection of intubate 6 has lock seat 11, is provided with jump ring 12 in the lock seat 11, and jump ring 12 can correspond with locking sleeve 10, and lock seat 11 lower part is connected with the shear pin seat 14 through giving up shear pin 27, and after giving up shear pin 27 cuts, lock seat 11 and shear pin seat 14 are disengaged.
The lower part threaded connection of shear pin seat 14 has a packing element axle 17, and packing element axle 17 outside is from last to movably cover in proper order is equipped with lock sleeve 15, packing element 18, upper cone 19 and slips 20, and vice piston 8 lower part outside is connected with presses cover 13, presses the cover 13 lower extreme to correspond with lock sleeve 15 upper end, is provided with lock spring 16 in the lock sleeve 15, and lock sleeve 15 lower extreme corresponds with packing element 18 upper end, and the upper cone 19 of complaining can get into in the slips 20 along the conical surface, makes packing element 18 correspond with slips 20, slips 20 downside is provided with lower cone 21 correspondingly, and lower cone 21 is connected with packing element axle 17.
When the auxiliary piston 8 descends, the auxiliary piston can prop against the lock sleeve 15, the rubber sleeve 18, the upper cone 19 and the slips 20 and downwards, the lower cone 21 is fixed, and finally the rubber sleeve 18 can be seated with the slips 20.
The lower part is connected with base 24 in the lower cone 21, and base 24 inside movably is provided with lower sliding sleeve 25, and lower cone 21 outside lower part is connected with lower adapter sleeve 23, and lower adapter sleeve 23 lower part is connected with sand washing head 26, and sand washing head 26 adopts the structure of triangle scraper form, can stir the sand face effectively, cooperation flushing sand.
The working principle is as follows:
the bridge plug is connected with the end part of the back-buckled drill rod and is put into a well, after the position of meeting the blockage is reached, the drill rod is connected with a pipeline for forward flushing, the wellhead turntable provides power for reversing the drill rod, the drill rod and the bridge plug form a tubular column which is lowered to the expected blocking position while sand flushing is carried out through a rotary tool, the steel ball 31 is put into the bridge plug through the inside of the drill rod to press a seat seal after the position is in place, cement is extruded, after cement is extruded, the bridge plug is thrown away by lifting the drill rod, the drill rod is released along with the drill rod, and the part left under the well is drilled with cement after the cement is solidified.
The specific working modes are as follows in combination with the accompanying drawings:
the upper joint 1 of this bridging plug is connected to the drilling rod lower extreme end, forms a whole tubular column back and goes into the well, after meeting the position that hinders, rotate the tubular column while washing sand, the moment of torsion passes through the drilling rod in proper order and goes to upper joint 1, go up adapter sleeve 2, intubate 6, lock seat 11, packing element axle 17, lower cone 21, lower adapter sleeve 23 to wash sand head 26 on, agitate the sand face through wash sand head 26, the sand after agitating is taken out the well along with circulating fluid through the preceding well drilling back underground sleeve pipe, until the instrument goes to the preset position down.
The circulating liquid flows through the upper joint 1, the upper sliding sleeve 4, the insertion pipe 6, the lower sliding sleeve 25, the base 24 and the sand washing head 26 to the sand surface. After the drill rod is in place, a steel ball 31 is put into the drill rod, the steel ball 31 enters the upper joint 1 through the drill rod and falls on the upper sliding sleeve 4, the upper sliding sleeve shear pin 30 is sheared by pressing the drill rod, the upper sliding sleeve 4 is separated from the upper joint 1, and the upper sliding sleeve 4 is clamped on a shoulder at the upper end of the insertion pipe 6 in a descending manner so as to give way for bridge plug setting liquid.
The pressure acts on the main piston 7 and the auxiliary piston 8 through the upper connecting sleeve 2, the shear pins 29 are started to be sheared under the force, the main piston 7 and the auxiliary piston 8 are simultaneously separated from the upper connecting sleeve 2, the pressing sleeve 13, the lock sleeve 15 and the lock springs 16 are driven to move downwards together, and the rubber sleeve 18 and the slips 20 are pushed to be set.
After setting is completed, as the pressure in the drill rod rises, the pressure relief shear pin 28 shears off, the main piston 7 and the auxiliary piston 8 are separated, and as the auxiliary piston 8 is fixed after setting, the main piston 7 drives the locking sleeve 10 to continue to move downwards, the lower end of the locking sleeve 10 stretches into the clamp spring 12, the pressure in the drill rod is relieved, and a cementing extrusion channel is opened. Cement is introduced into the well bore through the upper joint 1, the space between the upper connecting sleeve 2 and the cylinder 5, the cannula 6, the lower sliding sleeve 25, the base 24 and the sand washing head 26.
After the cementing is finished, lifting the drill rod, driving the upper joint 1, the upper connecting sleeve 2, the insertion pipe 6 and the lock seat 11 to ascend, shearing off the shear pins 27, disengaging the lock seat 11 from the shear pin seat 14, and completing releasing by the bridge plug.
The lower sliding sleeve 25 is driven to ascend while the cannula 6 ascends, the lower sliding sleeve 25 and the lower sealing sleeve 22 form a seal, and a cement extruding channel is closed. The upper joint 1, the upper connecting sleeve 2, the back cap 3, the upper sliding sleeve 4, the cylinder 5, the insertion tube 6, the main piston 7, the auxiliary piston 8, the upper sealing sleeve 9, the locking sleeve 10, the locking seat 11 and the clamping spring 12 are pulled out of the well along with a drill rod, and the rest part is left under the well, and is drilled out together with cement after the cement at the lower end of the bridge plug is solidified.
It will be appreciated that the above detailed description of the utility model is provided for illustration of the utility model and not for limitation of the technical solutions described in the embodiments of the utility model, and that the person skilled in the art should understand that the utility model may be modified or substituted for the same technical effects; as long as the use requirement is met, the utility model is within the protection scope of the utility model.
Claims (4)
1. The drillable sand washing cement bridge plug is characterized by comprising a cannula (6), an upper connecting sleeve (2) is connected to the outer upper portion of the cannula (6), an upper connector (1) is connected to the upper portion of the upper connecting sleeve (2), an upper sliding sleeve (4) is connected to the inner side of the upper connector (1) through an upper sliding sleeve (4) and a shear pin, a main piston (7) is connected to the lower portion of the upper connecting sleeve (2) through a starting shear pin (29), an auxiliary piston (8) is connected to the outer side of the main piston (7) through a pressure release shear pin (28), a lock seat (11) is connected to the middle portion of the cannula (6), a snap spring (12) is arranged in the lock seat (11), a shear pin seat (14) is connected to the lower portion of the lock seat (11) through a release shear pin (27), a rubber sleeve shaft (17) is connected to the lower portion of the shear pin seat (14), a lock sleeve (15), a rubber sleeve (18), an upper cone (19) and an auxiliary piston (20) are sequentially and movably sleeved from top to bottom, the outer side of the rubber sleeve (17) is connected to the lower end (15) through a pressure release shear pin (15), the lower end (13) is correspondingly provided with the lock sleeve (15), the utility model discloses a slip, including slip (20) and cone (20), cone (19) are gone into along the conical surface in the slip (20), make packing element (18) with slip (20) correspond, slip (20) downside is provided with cone (21) down correspondingly, cone (21) with be connected with packing element axle (17) down, lower part is connected with base (24) in cone (21) down, base (24) inside movably is provided with lower sliding sleeve (25), cone (21) outer lower part is connected with adapter sleeve (23) down, adapter sleeve (23) lower part is connected with sand washing head (26) down.
2. The drillable sand-washing cement bridge plug according to claim 1, characterized in that the outer side of the lower part of the upper connecting sleeve (2) and the outer side of the middle upper part of the auxiliary piston (8) are simultaneously provided with a cylinder barrel (5), a back cap (3) is connected on the cylinder barrel (5), the back cap (3) is connected with the upper connecting sleeve (2), the back cap (3) connects the end part of the cylinder barrel (5) on the upper connecting sleeve (2), and a space is reserved between the cylinder barrel (5) and the upper connecting sleeve (2).
3. Drillable sand-washing cement bridge plug according to claim 1, characterized in that the inner underside of the main piston (7) is connected with a locking sleeve (10), the locking sleeve (10) seals an upper sealing sleeve (9) between the main piston (7) and the insertion tube (6), a gap is left between the locking sleeve (10) and the insertion tube (6), and the locking sleeve (10) can correspond to the snap spring (12).
4. Drillable sand-washout cement bridge according to claim 1, characterized in that the sand-washout head (26) is a structure in the form of a triangular scraper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321446900.XU CN219910710U (en) | 2023-06-08 | 2023-06-08 | Drillable sand-flushing cement-extruding bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321446900.XU CN219910710U (en) | 2023-06-08 | 2023-06-08 | Drillable sand-flushing cement-extruding bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219910710U true CN219910710U (en) | 2023-10-27 |
Family
ID=88434553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321446900.XU Active CN219910710U (en) | 2023-06-08 | 2023-06-08 | Drillable sand-flushing cement-extruding bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219910710U (en) |
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2023
- 2023-06-08 CN CN202321446900.XU patent/CN219910710U/en active Active
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| GR01 | Patent grant | ||
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