CN202215174U - Near-well blockage removing device for unconsolidated sandstone heavy oil reservoir - Google Patents
Near-well blockage removing device for unconsolidated sandstone heavy oil reservoir Download PDFInfo
- Publication number
- CN202215174U CN202215174U CN2011202907621U CN201120290762U CN202215174U CN 202215174 U CN202215174 U CN 202215174U CN 2011202907621 U CN2011202907621 U CN 2011202907621U CN 201120290762 U CN201120290762 U CN 201120290762U CN 202215174 U CN202215174 U CN 202215174U
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- China
- Prior art keywords
- sleeve
- inner sleeve
- removing device
- ball valve
- plug
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- 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.)
- Expired - Lifetime
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a near-well blockage removing device for unconsolidated sandstone heavy oil reservoir. The device comprises an inner sleeve and a power device, wherein the power device is equipped in the inner sleeve and can move in an axial direction of the inner sleeve. The power device is provided with a pull bar. A free end of the pull bar is provided with a ball valve. An end of the inner sleeve, which is next to the ball valve, is provided with a piston. The diameter of the piston is larger than that of the inner sleeve. The piston is provided with a through hole for passing of the ball valve at a part which corresponds with the position of the ball valve. The diameter of the ball valve is equal with that of the through hole. An outer sleeve is sleeved on the inner sleeve. An annular chamber is provided between the inner sleeve and the outer sleeve. An outer wall of the outer sleeve is provided with a packer which is provided with at least two slide bars. The other end of each slide bar is connected with the outer wall of the outer sleeve and can vertically slide along the outer wall of the outer sleeve. The power device, the slide bars and the inner sleeve are respectively connected with a mechanical transmission device.
Description
Technical field
The utility model relates to the nearly well plug-removing device of a kind of loose sand heavy crude reservoir.
Background technology
For the loose sand heavy crude reservoir; Because viscosity of crude is high, formation cementation is loose; Offshore oilfield economical and efficient exploitation requires highly to output, and the migration of formation fines is inevitable, certainly will cause the oil layer blocking of near wellbore zone; Because sand control measure and formation fines migration cause silt up (fine silt, mud, colloid, the asphalitine) of nearly well reservoir, cause initial production to be successively decreased.Conventional solution is to rely on chemical agent or hydrodynamic cleaning well workover, but chemical pickling also erode downhole instrument simultaneously; Hydrodynamic cleaning is prone to form secondary pollution, and sphere of action is little, can not change the rock particles framework in nearly well contaminated zone; The conventional measure instrument that makes rises repeatedly goes into the well, long construction period, and operating cost is high.Seek to act on the near wellbore zone de-plugging measure permanent, that usefulness is high, cost is low and become the problem that the central an urgent demand of current loose sand heavy crude reservoir exploitation solves.
The utility model content
The purpose of the utility model provides the nearly well plug-removing device of a kind of loose sand heavy crude reservoir.
The nearly well plug-removing device of a kind of loose sand heavy crude reservoir that the utility model provides comprises inner sleeve and is located in the said inner sleeve and can be along the axially movable power set of said inner sleeve; Said power set are provided with pull bar; The free-end of said pull bar is provided with ball valve; The end of nearly said ball valve is provided with piston on the said inner sleeve, and the diameter of said piston is greater than the diameter of said inner sleeve; Corresponding position, position with said ball valve on the said piston is provided with through hole, the diameter of said ball valve and the equal diameters of said through hole; Be arranged with outer sleeve on the said inner sleeve, be provided with ring cavity between said inner sleeve and the said outer sleeve; The outer wall of said outer sleeve is provided with packer; Said packer is provided with at least two slide bars, and the other end of said slide bar all is connected in the outer wall of said outer sleeve and can moves up and down along the outer wall of said outer sleeve; Said power set, slide bar and inner sleeve all are connected with mechanical driving device.
In the above-mentioned plug-removing device, be arranged with sleeve on the said piston, said piston can slide up and down along the inwall of said sleeve, is used for fixing and supports said plug-removing device.
In the above-mentioned plug-removing device, the outer wall of said sleeve is provided with centralizer, can guarantee that said plug-removing device is placed in the middle, does not produce to horizontally slip.
In the above-mentioned plug-removing device, said packer is provided with the slide bar of two symmetries, said packer is pushed uniformly and stretch; When said slide bar pushed said packer, said packer stopped up the annular space between the sleeve pipe in said outer sleeve and the stratum; When said slide bar stretched said packer, said packer can be opened the annular space between the sleeve pipe in said outer sleeve and the stratum; Said packer can be processed by high strength, high temperature resistant, corrosion resistant elastomeric material.
In the above-mentioned plug-removing device, the wall of said sleeve is provided with pressure sensor, is used for measuring the pressure of the annular space between the sleeve pipe on said sleeve and stratum.
In the above-mentioned plug-removing device, said mechanical driving device links to each other with power supply through cable, for sliding up and down of said slide bar, power set and inner sleeve provides power.
The nearly well plug-removing device of a kind of loose sand heavy crude reservoir that the utility model provides produces " low frequency ", " high-amplitude " that continue through the down-hole and disturbs, and perturbation wave transmits " kinetic energy " to the near wellbore zone from the shaft bottom; Vibrate nearly well and silt sand, mud, glue mixture in the band up; And reorganization sand bridge framework, make obstruction output in the duct, remove the obstruction of near wellbore zone; Improve the permeability of near wellbore zone, oil well output.
Description of drawings
Fig. 1 is the structural representation of the nearly well plug-removing device of loose sand heavy crude reservoir of the utility model, and each mark is following among the figure: 1 inner sleeve, 2 power set, 3 pull bars, 4 ball valves, 5 pistons, 6 through holes, 7 outer sleeves, 8 packers, 9 slide bars, 10 sleeves, 11 centralizers, 12 pressure sensors, 13 cables.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is further specified, but the utility model is not limited to following examples.
The nearly well plug-removing device of the loose sand heavy crude reservoir that the utility model provides comprises on inner sleeve 1 and the inwall of being located at this inner sleeve 1 and can be along its power set that axially move up and down 2; Be fixed with pull bar 3 on these power set 2, the free-end of pull bar 3 is connected with ball valve 4, when power set 2 when the inwall of inner sleeve 1 moves back and forth up and down, but drivening rod 3 and ball valve 4 move up and down; Be fixed with a piston 5 on the end of inner sleeve 1 nearly ball valve 4; Corresponding position, position with ball valve 4 on this piston 5 is provided with a through hole 6, and the equal diameters of the diameter of through hole 6 and ball valve 4 is when ball valve 4 moves downward to this through hole 6; Then can stop up this through hole 6, make inner sleeve 1 form the space of sealing; Be arranged with outer sleeve 7 on the inner sleeve 1, be provided with ring cavity between inner sleeve 1 and the outer sleeve 7; Be fixed with packer 8 on the outer wall of outer sleeve 7; Be connected with the slide bar 9 of two symmetries on the packer 8; The other end of slide bar 9 all is fixed on the outer wall of outer sleeve 7 and can moves up and down along it; Slide bar 9 is used for extruding and stretching packer 8; When slide bar 9 squeeze packers 8, then packer 8 produces elastic deformation and can stop up the annular space between the sleeve pipe in outer sleeve 7 and the stratum; When slide bar 9 stretching packers 8, then packer 8 output elasticity distortion can be opened the annular space between the sleeve pipe in outer sleeve 7 and the stratum; Power set 2, inner sleeve 1 and slide bar 9 (not shown) that all is connected with mechanical driving device, this mechanical driving device links to each other with power supply through cable 13, for this plug-removing device provides power; Be arranged with sleeve 10 on the piston 5 of the lower end of this plug-removing device, piston 5 can slide up and down along the inwall of sleeve 10, is used for fixing and supports this plug-removing device; The outer wall of this sleeve 10 is provided with centralizer 11, and the other end of this centralizer 11 is fixed on the sleeve pipe in the stratum, can guarantee that this plug-removing device is placed in the middle, and is fixed on sleeve pipe central authorities, does not produce to horizontally slip; Pressure sensor 12 is arranged on the wall of sleeve 10, be used for the pressure of the annular space between the sleeve pipe on The real time measure sleeve 10 and stratum; This plug-removing device can be fixed on oil pipe or the oil pump through the screw thread (not shown).
In the nearly well plug-removing device of above-mentioned loose sand heavy crude reservoir, packer 8 can be high strength, heatproof, corrosion-resistant material; The material of inner sleeve 1, outer sleeve 7 and sleeve 10 can be selected according to actual needs and confirm; The diameter of inner sleeve 1, outer sleeve 7 and sleeve 10 can be confirmed according to actual needs; The number of slide bar 9 can be confirmed according to actual needs.
When using the nearly well plug-removing device of above-mentioned loose sand heavy crude reservoir, at first make slide bar 9 squeeze packers 8 through mechanical driving device, then packer 8 produces deformation and stops up the annular space between the sleeve pipe in outer sleeves 7 and the stratum; And then make power set 2 to lower slider through mechanical driving device, then pull bar 3 drives ball valves 3 and also moves downward, and when ball valve 4 is displaced downwardly to when just in time cooperating with through hole 6, makes power set 2 stop slip; Through mechanical driving device whole inner sleeve 1 (comprising the piston 5 that the bottom connects) being done along the inwall of outer sleeve 7 more at last pumps; Can be the state that high-low pressure replaces that produces in the well wellbore then in piston 5 lower space; Produce the vibration of fluid, thereby remove the obstruction of near wellbore zone.
Claims (6)
1. nearly well plug-removing device of loose sand heavy crude reservoir is characterized in that: said plug-removing device comprises inner sleeve and is located in the said inner sleeve and can be along the axially movable power set of said inner sleeve; Said power set are provided with pull bar; The free-end of said pull bar is provided with ball valve; The end of nearly said ball valve is provided with piston on the said inner sleeve, and the diameter of said piston is greater than the diameter of said inner sleeve; Corresponding position, position with said ball valve on the said piston is provided with through hole, the diameter of said ball valve and the equal diameters of said through hole; Be arranged with outer sleeve on the said inner sleeve, be provided with ring cavity between said inner sleeve and the said outer sleeve; The outer wall of said outer sleeve is provided with packer; Said packer is provided with at least two slide bars, and the other end of said slide bar all is connected in the outer wall of said outer sleeve and can moves up and down along the outer wall of said outer sleeve; Said power set, slide bar and inner sleeve all are connected with mechanical driving device.
2. plug-removing device according to claim 1 is characterized in that: be arranged with sleeve on the said piston, said piston can slide up and down along the inwall of said sleeve.
3. plug-removing device according to claim 2 is characterized in that: the outer wall of said sleeve is provided with centralizer.
4. according to claim 2 or 3 described plug-removing devices, it is characterized in that: the outer wall of said sleeve is provided with pressure sensor.
5. plug-removing device according to claim 1 and 2 is characterized in that: said packer is provided with the slide bar of two symmetries.
6. plug-removing device according to claim 1 and 2 is characterized in that: said mechanical driving device links to each other with power supply through cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202907621U CN202215174U (en) | 2011-08-11 | 2011-08-11 | Near-well blockage removing device for unconsolidated sandstone heavy oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202907621U CN202215174U (en) | 2011-08-11 | 2011-08-11 | Near-well blockage removing device for unconsolidated sandstone heavy oil reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202215174U true CN202215174U (en) | 2012-05-09 |
Family
ID=46014434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202907621U Expired - Lifetime CN202215174U (en) | 2011-08-11 | 2011-08-11 | Near-well blockage removing device for unconsolidated sandstone heavy oil reservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202215174U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305040A (en) * | 2011-08-11 | 2012-01-04 | 中国海洋石油总公司 | Near-well de-plugging device for loose sand heavy oil reservoir |
-
2011
- 2011-08-11 CN CN2011202907621U patent/CN202215174U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305040A (en) * | 2011-08-11 | 2012-01-04 | 中国海洋石油总公司 | Near-well de-plugging device for loose sand heavy oil reservoir |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: China National Offshore Oil Corporation Patentee after: CNOOC Research Institute Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: China National Offshore Oil Corporation Patentee before: CNOOC Research Center |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120509 |
|
| CX01 | Expiry of patent term |