CN104563953A - Double-layer steel pipe expansion type pipe external casing packer - Google Patents
Double-layer steel pipe expansion type pipe external casing packer Download PDFInfo
- Publication number
- CN104563953A CN104563953A CN201310510858.8A CN201310510858A CN104563953A CN 104563953 A CN104563953 A CN 104563953A CN 201310510858 A CN201310510858 A CN 201310510858A CN 104563953 A CN104563953 A CN 104563953A
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- China
- Prior art keywords
- expansion
- pipe
- packing
- tube
- double
- Prior art date
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- Pending
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 10
- 239000010959 steel Substances 0.000 title claims abstract description 10
- 238000012856 packing Methods 0.000 claims abstract description 76
- 239000000463 material Substances 0.000 claims abstract description 5
- 210000002445 nipple Anatomy 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007769 metal material Substances 0.000 claims description 3
- 238000005987 sulfurization reaction Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract 3
- 239000011229 interlayer Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- E21B33/127—Packers; Plugs with inflatable sleeve
Landscapes
- 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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a double-layer steel pipe expansion type pipe external casing packer, which comprises an expansion base pipe, a packing unit, an upper joint and a lower joint, wherein the upper joint and the lower joint are processed at the two ends of the expansion base pipe, the packing unit is formed by installing one or more than one packing unit outside the expansion base pipe at intervals, each packing unit comprises an expansion outer pipe, upper and lower fixed pup joints and a rubber tube, the upper and lower fixed pup joints are connected with the two ends of the expansion outer pipe, the rubber tube is connected with the outer part of the expansion outer pipe, the expansion base pipe and the expansion outer pipe respectively adopt expansion steel pipe materials, the upper and lower ends of the expansion outer pipe are connected onto the expansion base pipe through the upper and lower fixed pup joints, and a pre-set expansion cavity is formed between the expansion outer pipe and the expansion base pipe. The external casing packer has the advantages that through the expansion of a double-layer steel pipe, the tight attachment of the steel pipe and the rubber tube to the ground layer is realized, the advantages of great packing outer diameter of the packer, high intensity, capability of complying with the well hole packing and the like are realized, and the external casing packer can be widely used in the fields of well completion such as segmented well completion and inter-layer packing.
Description
Technical field
The present invention relates to drilling completion field of tool, especially sectional well completion and Inter-zonal packing provide a kind of double-layer pipe expansion type external pipe packer.
Background technology
External packer of pipe is the important tool in Cementing, selective completion operation process, be connected with sleeve pipe, be used to the downhole tool of annular space between packing sleeve pipe and the borehole wall, by relying on the separation of the outer packing implementation level section of pipe, it can carry out operation and manufacture control by interval, thus effectively realizes the Inter-zonal packing to Oil/gas Well segmentation exploitation and bad ground.
Existing external casing packer is met water self-expanding two kinds of modes primarily of the swollen envelope of packing element and chance oil and is realized managing outer packing.Envelope mode that packing element is swollen, by entering the high-pressure fluid effect in packing element expansion chamber, makes packer inflation distortion be formed with borehole wall close contact and seals, and realizes closing and separating annular space.Hydraulic expansion type external packer of pipe is inflating medium usually with drilling fluid, and under the complicated subsurface environment such as HTHP, casing eccentricity, easy packing was lost efficacy; Cement paste expansion type external pipe packer adopts cement paste as inflating medium, but its construction technology is comparatively complicated, causes serious construction accident; Meet oily/chance water self-expanding external packer of pipe and adopt chance oil/chance water self-expanding rubber, by expanding with packing stratum after the chance oil/chance water of later stage packing element, but it is packing limited efficiency under high-temperature and high-pressure conditions, after rubber generation self-expanding simultaneously, packing intensity is also restricted, and is difficult to packing bad ground.
Conventional cannula external packer has now been widely used in petroleum oil well completion field, carries out screen casing sectional well completion, Inter-zonal packing, protects and reduces oil layer pollution, and delays horizontal well bottom water coning to a certain extent; But still there is the difficult problems such as packing limited efficiency, packing rubber is fragile, packing timeliness is short.
Summary of the invention
The object of the invention is the deficiency expanded existing for the mode of carrying out packing by cartridge for existing external casing packer technology, a kind of double-layer pipe expansion type external pipe packer is proposed, by the expansion of double-layer pipe, realize steel pipe and rubber tube is close to stratum, have that packing packing external diameter is large, intensity is high, can comply with the advantages such as well packing, the completion such as sectional well completion and Inter-zonal packing field can be widely used in.
The present invention is achieved in that
Double-layer pipe expansion type external pipe packer, comprise expansion base tube, packing units, top connection and lower contact, expansion base tube two ends are processed with top connection and lower contact, wherein: described packing units is located at the outside of expansion base tube by one or more packing units intervals, each packing units comprises expansion outer tube, is connected to fixing pipe nipple up and down and being connected to the rubber tube of expansion outside pipe of expansion outer tube two ends; Expansion base tube and expansion outer tube all adopt expandable steel tubular material, and the upper and lower side of expansion outer tube is connected on expansion base tube by fixing pipe nipple up and down, presets expansion chamber between expansion outer tube and expansion base tube.
Such scheme also comprises:
Liquid is injected in expansion chamber.
At expansion outer tube two ends respectively by connecting short section with fix pipe nipple up and down and be connected, connecting short section is provided with expandable sealing ring with outside the expansion base tube in cross section, and on upper fixing pipe nipple, radial direction is processed with inlet opening.
Described joint ring adopts the metal material with certain extension property, and is processed as loop configuration.
Expansion outer tube relative expansion base tube wall thickness is thinner, and its shape comprises pipe or waveform pipe.
Described rubber tube is one or more snippets, and the direct sulfuration of caulking gum of employing is at the outer tube outer surface of expansion, or embedded processing is outside expansion outer tube, or adopts chance oil/chance water self-expanding rubber.
The invention has the advantages that:
(1) by the expansion of double-layer pipe, realize steel pipe and rubber tube is close to formation seals, by the theory inlet tube external packer of expansion tube, packing intensity, apparently higher than the simple packing element packing of routine, effectively provides stratum packing ability.
(2) the present invention relies on double-layer pipe to expand, rubber tube also expands thereupon, and therefore the present invention has larger external diameter after expanding, and its packing well eye thimble empty gap scope is larger, well can be close to and comply with borehole wall packing, packing units length and quantity can be regulated to improve packing effect simultaneously.
(3) can not there is rubber rebound phenomenon in swollen being honored as a queen of the present invention, and packing timeliness is long, is applicable to the fields such as screen casing sectional well completion, expandable screen completion, selective completion and Inter-zonal packing.
Accompanying drawing explanation
A kind of double-layer pipe expansion type external pipe packer of Fig. 1 structural representation
Packing units schematic diagram during Fig. 2 a expansion closedown inlet opening
Fig. 2 b packing units expansion schematic diagram
Packing units schematic diagram after Fig. 2 c expands
External packer of pipe structural representation after Fig. 3 expansion sets
In figure: 1. expansion base tube, 2. expansion outer tube, 3. connecting short section, fix pipe nipple 4., 5. time fixing pipe nipple, 6. rubber tube, 7. Expansion sealing ring, 8. top connection, 9. lower contact, 10. pipe in inlet opening 11., 12. reducing expansion tools, 13 expansion chambers, 14. packing units.
Detailed description of the invention
Now in conjunction with Figure of description, the invention will be further described.
As shown in Figures 1 to 3, a kind of double-layer pipe expansion type external pipe packer, comprise the parts compositions such as expansion base tube 1, packing units 14, top connection 8 and lower contact 9, expansion base tube 1 two ends are processed with top connection 8 and lower contact 9, packing units 14 primarily of expansion outer tube 2, connecting short section 3, upper fixing pipe nipple 4, lower fixing pipe nipple 5, rubber tube 6, seal 7, the formations such as inlet opening 10 and expansion chamber 13.Expansion base tube 1 and expansion outer tube 2 all adopt expandable steel tubular material, and expansion outer tube 2 relative expansion base tube 1 wall thickness is thinner, and more easily realize hydraulic expansion, its shape can be pipe, also can be the opposite sex pipes such as waveform pipe.Expansion outer tube 2 is positioned at outside expansion base tube 1, and upper end is fixedly connected on expansion base tube 1 by connecting short section 3 and upper fixing pipe nipple 4, and lower end is connected with expansion base tube 1 with lower fixing pipe nipple 4 by connecting short section 3.Be processed with Expansion sealing ring 7 with connecting short section 3 with expansion base tube 1 external surface of radial section, Expansion sealing ring 7 can adopt the metal material with certain extension property and be made into loop configuration.Upper fixing pipe nipple 4 and lower fixing pipe nipple 5 lay respectively at packing units 14 two ends, employing expandable material processes, and can expand with expansion base tube 1 simultaneously, is stepped circular tube structure, upper fixing pipe nipple 4 is processed with inlet opening 10, and lower fixing pipe nipple 5 does not process inlet opening 10.
As shown in Fig. 1 and Fig. 2 a, treat the precalculated position of both sides, packing stratum needed for instrument G.I.H, in well, liquid enters annular space between expansion base tube 1 and expansion outer tube 2 by the inlet opening 10 of upper fixing pipe nipple 4.Under enter interior pipe 11 and reducing expansion tool 12 to packing units 14 both sides, reducing expansion tool 12 realizes reducing under hydraulic action, and reducing mode can be roller expansion fashion, also can be cone sheet closed manners.While reducing expansion tool 12 realizes reducing, impel expansion base tube 1 to expand thereupon.Reducing expansion tool under hydraulic pressure and mechanical mating reaction, by from lower motion, the radial deformation of expansion base tube 1 is extended vertically.When expansion base tube 1 is expanded to Expansion sealing ring 7 place, originally also expand with the discontiguous Expansion sealing ring 7 of connecting short section 3 thereupon, its external diameter increases, ring is close between expansion base tube 1 and connecting short section 3, form metal sealing, thus close inlet opening 10, make the annular space between expansion base tube 1 and expansion outer tube 2 form a hydraulic buckling chamber 13.It is worth mentioning that, upper fixing pipe nipple 4 also can not process inlet opening 10, by injecting liquid at the expansion chamber 13 expanded in advance between base tube 1 and expansion outer tube 2, is pre-formed sealed expansion chamber 13, when expansion base tube 1 expands, realize the extrusion expansion of liquid to expansion outer tube 2.
As shown in Figure 2 b, after inlet opening 10 on upper fixing pipe nipple 4 is closed, reducing expansion tool 12 continues to move downward, expansion base tube 1 completes expansion gradually, the space of expansion chamber 13 has by the trend compressed, but owing to being filled with incompressible liquid in expansion chamber 13, therefore the liquid in expansion chamber 13 will inevitably impel more yielding expansion outer tube 2 relatively to expand, make processing be extruded into stratum at the caulking gum cylinder 6 of expansion outer tube 2 external surface, set until whole packing units 14 completes expansion.After Expansion sealing ring 7 expansion of packing units 14 bottom, also corresponding with it with outside connecting short section 3 forms metal sealing, strengthen packing units 14 expand after the sealing performance of liquid in expansion chamber 13, liquid in expansion chamber 13 cannot be outflowed, prevent late expansion outer tube 2 and caulking gum cylinder 6 under strata pressure effect, resilience or rebound phenomenon occurring.
As shown in Fig. 2 c and Fig. 3, when reducing expansion tool 12 makes expansion base tube 1 expand, extension is sat in the expansion also completing all packing units 14, realizes Inter-zonal packing.When the present invention and conventional cannula, screen casing etc. with the use of time, expand after sitting and hanging, the phenomenon that the expansion base tube 1 existence part near top connection 8 and lower contact 9 does not expand, form reducing shape small in ends, broad in the middle; When the present invention and the follow-up expansion such as expansion sleeve, expandable screen product with the use of time, then whole expansion base tube 1 all expands.
The present invention is by the expansion of double-layer pipe, packing units 14 has larger external diameter, its packing well eye thimble empty gap scope is larger, well can be close to and comply with borehole wall packing, realize expansion outer tube 2 and rubber tube 6 is close to formation seals, packing intensity, apparently higher than the packing of routine simple rubber tube 6, can regulate packing units 14 length and quantity to improve packing effect simultaneously.
The present invention is swollen to be honored as a queen rubber tube 6 rebound phenomenon can not occur, effectively improve packing intensity and extend packing timeliness, have that packing packing external diameter is large, intensity is high, can comply with the advantages such as well packing, can effective packing oil-gas-water layer, selectively exploit or a certain interval of shutoff, ensure the sealing of casing annulus, the completion fields such as screen casing sectional well completion, expandable screen completion, selective completion and Inter-zonal packing can be widely used in.
Claims (5)
1. double-layer pipe expansion type external pipe packer, comprise expansion base tube, packing units, top connection and lower contact, expansion base tube two ends are processed with top connection and lower contact, it is characterized in that: described packing units is located at the outside of expansion base tube by one or more packing units intervals, each packing units comprises expansion outer tube, be connected to fixing pipe nipple up and down and being connected to the rubber tube of expansion outside pipe of expansion outer tube two ends; Expansion base tube and expansion outer tube all adopt expandable steel tubular material, and the upper and lower side of expansion outer tube is connected on expansion base tube by fixing pipe nipple up and down, presets expansion chamber between expansion outer tube and expansion base tube.
2. double-layer pipe expansion type external pipe packer according to claim 1, is characterized in that: inject liquid in expansion chamber.
3. double-layer pipe expansion type external pipe packer according to claim 1, it is characterized in that: at expansion outer tube two ends respectively by connecting short section with fix pipe nipple up and down and be connected, connecting short section is provided with expandable sealing ring with outside the expansion base tube in cross section, and on upper fixing pipe nipple, radial direction is processed with inlet opening.
4. double-layer pipe expansion type external pipe packer according to claim 3, is characterized in that: described joint ring adopts the metal material with certain extension property, and is processed as loop configuration.
5. the double-layer pipe expansion type external pipe packer according to claim 1,2,3 or 4, is characterized in that: expansion outer tube relative expansion base tube wall thickness is thinner, and its shape comprises pipe or waveform pipe; Described rubber tube is one or more snippets, and the direct sulfuration of caulking gum of employing is at the outer tube outer surface of expansion, or embedded processing is outside expansion outer tube, or adopts chance oil/chance water self-expanding rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310510858.8A CN104563953A (en) | 2013-10-27 | 2013-10-27 | Double-layer steel pipe expansion type pipe external casing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310510858.8A CN104563953A (en) | 2013-10-27 | 2013-10-27 | Double-layer steel pipe expansion type pipe external casing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104563953A true CN104563953A (en) | 2015-04-29 |
Family
ID=53080938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310510858.8A Pending CN104563953A (en) | 2013-10-27 | 2013-10-27 | Double-layer steel pipe expansion type pipe external casing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104563953A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108463611A (en) * | 2016-02-01 | 2018-08-28 | 韦尔泰克有限公司 | Downhole completion system |
| CN109296335A (en) * | 2018-10-22 | 2019-02-01 | 中国石油天然气集团有限公司 | Expansion tube packer |
| CN109869114A (en) * | 2017-12-01 | 2019-06-11 | 中石化石油工程技术服务有限公司 | A kind of packing formula stage cementing device and its operational method |
| CN110439478A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | Inner layer sleeve is the pipe in pipe casing being threadedly coupled and its assembly method |
-
2013
- 2013-10-27 CN CN201310510858.8A patent/CN104563953A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108463611A (en) * | 2016-02-01 | 2018-08-28 | 韦尔泰克有限公司 | Downhole completion system |
| CN109869114A (en) * | 2017-12-01 | 2019-06-11 | 中石化石油工程技术服务有限公司 | A kind of packing formula stage cementing device and its operational method |
| CN109296335A (en) * | 2018-10-22 | 2019-02-01 | 中国石油天然气集团有限公司 | Expansion tube packer |
| CN110439478A (en) * | 2019-07-18 | 2019-11-12 | 中国石油天然气集团有限公司 | Inner layer sleeve is the pipe in pipe casing being threadedly coupled and its assembly method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |