CN2242332Y - Fluorine plastic packing for oil water well - Google Patents
Fluorine plastic packing for oil water well Download PDFInfo
- Publication number
- CN2242332Y CN2242332Y CN 95234415 CN95234415U CN2242332Y CN 2242332 Y CN2242332 Y CN 2242332Y CN 95234415 CN95234415 CN 95234415 CN 95234415 U CN95234415 U CN 95234415U CN 2242332 Y CN2242332 Y CN 2242332Y
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- CN
- China
- Prior art keywords
- fluoroplastics
- water well
- central tube
- oil
- packer
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides a fluorine plastic packing device for an oil water well. The packing device is composed of a reduced central pipe, fluorine plastic sealing rings, a lead sealing ring, and a packing removing component. Two fluorine plastic sealing ring and the middle lead sealing ring are sheathed on the reduced central pipe. The packing removing component is arranged at the lower part of the sealing rings and the lower part of the packing removing component can support on the bottom of the well or a slip. The upper end of the reduced central pipe is connected with the lower end of an oil pipe. The utility model has the advantage that the utility model can be used in the high-pressure, high-temperature, and corrosive medium for a long time. The utility model can particularly still keep the reliable sealing under the conditions of the corrosion, the deformation, etc. of the sleeve pipe of the oil water well in the mid-anaphase of the development. The utility model has the advantages of simple structure, less materials, easy fabrication, and low cost.
Description
Used sealing in well or packer when the utility model relates to from well recover petroleum or water filling particularly is subjected to a kind of oil-water well fluoroplastics packer that axial compression can expanded radially.
Each oil field often must become several sections up and down with the oil pipe of oil-water well with toroidal cavity packing between the sleeve pipe when Petroleum Production or well workover.For this reason, waterpower and mechanical packer have been adopted both at home and abroad.These packers all have rubber parts, and application life is short, and heatproof is low, and seal pressure differential is little, and it is unreliable to seal.Particularly for the oil-water well of oil field development middle and later periods, because casing deformation or wall erosion are serious, the sealing performance of this packer is poorer.Its other shortcoming is that structure is complicated, and cost is higher.
The patent documentation announced over 10 years of Patent Office of the People's Republic of China by retrieval, total nearly 50 packer patented technologies all are difficult to avoid above-mentioned shortcoming.
Shortcoming and defect part in view of above-mentioned prior art, the purpose of this utility model is: a kind of oil-water well fluoroplastics packer is provided, with further raising its application life, serviceability temperature and seal pressure differential, especially in the oil-water well of casing corrosion, distortion, still has excellent sealing performance, and this body structure of packer is very simple, and cost further reduces.
Above-mentioned purpose of the present utility model is realized by following technical proposals:
This packer is made up of reducing central tube, fluoroplastics joint ring, lead-tight ring and deblocking parts.Do not set state in the down-hole, two fluoroplastics joint rings and a lead-tight ring all are sleeved on minimum outer diameter place, reducing central tube bottom, and the lead-tight ring is clipped in up and down between two fluoroplastics joint rings.The deblocking parts place down fluoroplastics joint ring below.Packer bottom tail pipe be supported on and the end or slips on.The upper end of reducing central tube is connected with the lower end of tubing string.
Reducing central tube in the above-mentioned oil-water well fluoroplastics packer, the outside is stairstepping, is divided into three sections, and external diameter diminishes from top to bottom successively.Its reducing transition part is truncated conical shape.Its hypomere is longer, in, epimere is short and length is close.
Fluoroplastics joint ring in above-mentioned profit and the fluoroplastics packer and lead-tight ring do not set state in the down-hole, and its external diameter is less than casing inner diameter 5-8 millimeter.
Two fluoroplastics joint rings up and down in the above-mentioned oil-water well fluoroplastics packer are all selected polytetrafluoroethylene (PTFE) or other fluoroplastics processing and manufacturing for use.
Deblocking parts in the above-mentioned oil-water well fluoroplastics packer, its inwall is stepped, in inside dimension and the reducing central tube, hypomere external diameter and round platform size be consistent; External diameter when its external diameter does not set state with joint ring is identical.
Its process of setting is: this packer is received the tubing string lower end, and to the interior desired depth of well, its underpart tail pipe just is supported on shaft bottom or the slips down.At this moment continue to transfer tubing string, make the reducing central tube descending, first round platform of reducing central tube bottom passes three joint rings successively, and joint ring is outwards dilated under the tubing string action of gravity, touches casing inner diameter.The reducing central tube continues descending again, and under the effect of tubing string gravity, its second round platform passes three joint rings successively, all is in reducing central tube epimere maximum gauge position up to three joint rings.At this moment, two fluoroplastics joint rings just are in abundant swelling state, and the lead-tight ring just produces plastic strain.Because the lead-tight ring is sandwiched between two fluoroplastics joint rings, lead material just is full of by fluoroplastics joint ring sealed hollow up and down, and fills up all distortion of internal surface of sleeve pipe, injustice or fault location, thereby realizes well setting.
Remove setting if desired, need only and carry tubing string, the reducing central tube also rises thereupon, and the fluoroplastics joint ring just shrinks, and packer just can trip out from the down-hole together in company with tubing string.
The utility model is compared with aforementioned existing packer, major advantage is: owing to adopted ultimate tensile strength 25MPa, limit cold flow properties is that the polytetrafluoroethylene (PTFE) of 14MPa is as upper and lower joint ring, the lead that adopts creep limit 2MPa is as the intermediate seal ring, therefore, the sealing ring can not need technical maintenance in the High Pressure Difference of 50MPa, 320 ℃ high temperature and the medium-term and long-term use of Korrosionsmedium, and further prolong its application life.Particularly, can fill up corrosion default, mechanical damage and the distortion of internal surface of casing after being squeezed, so can improve the reliability of oil field development middle and later periods oil-water well packer because middle lead-tight ring has sufficient creep properties.Also since its structure simple especially, material usage seldom, handling ease is so cost further reduces.
Accompanying drawing 1 is the structural representation of this packer when not setting state in the down-hole.
Accompanying drawing 2 is its process of setting schematic diagrames when beginning.
Accompanying drawing 3 is that its process of setting is finished the phase I schematic diagram.
Accompanying drawing 4 is its process of setting schematic diagrames that finish.
Details are as follows to embodiment of the present utility model in conjunction with the accompanying drawings:
In the accompanying drawing 1, the 1st, Casing Failure, the 2nd, tubing string, the 3rd, the reducing central tube of this packer, the 4th, last fluoroplastics joint ring, the 5th, lead-tight ring, the 6th, following fluoroplastics joint ring, the 7th, deblocking parts.From Fig. 1 as seen, do not set under the state in the down-hole, joint ring 4,5,6 is sleeved on the upper end at the minimum place of reducing central tube 3 hypomere external diameters, and deblocking parts 7 place joint ring 6 belows, and reducing central tube 3 is connected to the lower end of tubing string 2.
The initial state of packer setting process shown in the accompanying drawing 2.Reducing central tube 3 is descending together in company with tubing string 2, and its first round platform A at first enters upper sealing ring 4, makes its distending touch the inner surface of sleeve pipe 1.Reducing central tube 3 continues descending then.
The reducing central tube goes downwards to the phase I position shown in the accompanying drawing 3.At this moment, reducing central tube 3 first round platform A have crossed three joint rings, and three joint rings 4,5,6 have been in the position, stage casing of reducing central tube 3.Under this state, because middle lead-tight ring 5 plasticity are bigger, its external surface can only contact with sleeve pipe 1 inwall, and the inwall that bigger fluoroplastics (present embodiment employing polytetrafluoroethylene (PTFE)) joint ring 4 of elasticity and 6 external surfaces will be close to sleeve pipe 1, the lead-tight ring 5 in the middle of when preventing to continue to dilate is extruded.Reducing central tube 3 continues descending again.
The state that finishes of packer setting shown in the accompanying drawing 4.At this moment, 3 second round platform B of reducing central tube have crossed three joint rings, and three joint rings 4,5,6 have been in reducing central tube 3 epimere maximum outside diameter positions.Under this state,, just make joint ring 4 and 6 be in tighter bloated state because the gap between reducing central tube 3 and the sleeve pipe 1 is littler.Simultaneously, enough big extruding force makes the lead material of lead-tight ring 5 be extruded, and is full of the uneven place of all corrosion defaults of sleeve pipe 1 inwall, damage and distortion.Thereby further improve seal pressure differential and sealing reliability.
As the need deblocking, need only and carry tubing string 2, reducing central tube 3 also rises thereupon, and joint ring 4 and 6 just contracts to recovery, and this packer just can be tripped out by the down-hole together in company with tubing string 2.
Claims (5)
1. oil-water well fluoroplastics packer, it is characterized in that forming by reducing central tube, fluoroplastics joint ring, lead-tight ring and deblocking parts, do not set state in the down-hole, two fluoroplastics joint rings and lead-tight ring all are sleeved on the minimum pipe place of reducing central tube bottom, and the lead-tight ring is clipped in up and down between two fluoroplastics joint rings, the deblocking parts place down fluoroplastics joint ring below, the tail pipe of packer bottom is supported on shaft bottom or the slips, and the upper end of reducing central tube is connected with the lower end of tubing string.
2. oil-water well fluoroplastics packer according to claim 1 is characterized in that reducing central tube outside is stairstepping, is divided into three sections, external diameter diminishes from top to bottom successively, its reducing transition part is truncated conical shape, and its hypomere is longer, in, epimere is short and length is close.
3. oil-water well fluoroplastics packer according to claim 1 is characterized in that under the state of not setting, and fluoroplastics joint ring and lead-tight ring external diameter are less than casing inner diameter 5-8 millimeter.
4. according to claim 1 or 3 described oil-water well fluoroplastics packers, it is characterized in that two fluoroplastics joint rings are all selected polytetrafluoroethylene (PTFE) or other fluoroplastics processing and manufacturing for use up and down.
5. oil-water well fluoroplastics packer according to claim 1, it is characterized in that deblocking parts inwall is stepped, in its inside dimension and the reducing central tube, hypomere external diameter and round platform size be consistent, the external diameter when its external diameter does not set state with joint ring is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95234415 CN2242332Y (en) | 1995-08-04 | 1995-08-04 | Fluorine plastic packing for oil water well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95234415 CN2242332Y (en) | 1995-08-04 | 1995-08-04 | Fluorine plastic packing for oil water well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2242332Y true CN2242332Y (en) | 1996-12-11 |
Family
ID=33878350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95234415 Expired - Fee Related CN2242332Y (en) | 1995-08-04 | 1995-08-04 | Fluorine plastic packing for oil water well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2242332Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8053509B2 (en) | 2005-12-30 | 2011-11-08 | Starse Energy And Technology (Group) Co., Ltd. | Starch-(meth)acrylate graft copolymer, oil-swellable material and oil- and water-swellable material comprising the same, and sealing articles and packers prepared from said swellable material |
| CN108442910A (en) * | 2018-05-08 | 2018-08-24 | 北京大正天予石油科技有限责任公司 | Steam injection string system |
-
1995
- 1995-08-04 CN CN 95234415 patent/CN2242332Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8053509B2 (en) | 2005-12-30 | 2011-11-08 | Starse Energy And Technology (Group) Co., Ltd. | Starch-(meth)acrylate graft copolymer, oil-swellable material and oil- and water-swellable material comprising the same, and sealing articles and packers prepared from said swellable material |
| CN108442910A (en) * | 2018-05-08 | 2018-08-24 | 北京大正天予石油科技有限责任公司 | Steam injection string system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |