CN104563953A - Double-layer steel pipe expansion type pipe external casing packer - Google Patents

Double-layer steel pipe expansion type pipe external casing packer Download PDF

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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
Authority
CN
China
Prior art keywords
expansion
pipe
tube
packing
double
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.)
Pending
Application number
CN201310510858.8A
Other languages
Chinese (zh)
Inventor
唐明
吴柳根
蔡鹏�
宁学涛
滕照正
马建忠
朱海波
朱万胜
唐成磊
候婷
沈学祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petrochemical Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Original Assignee
China Petrochemical Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Petrochemical Corp, Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp filed Critical China Petrochemical Corp
Priority to CN201310510858.8A priority Critical patent/CN104563953A/en
Publication of CN104563953A publication Critical patent/CN104563953A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/12Packers; Plugs
    • E21B33/127Packers; Plugs with inflatable sleeve

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

Double-layer pipe expansion type external pipe packer
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.
CN201310510858.8A 2013-10-27 2013-10-27 Double-layer steel pipe expansion type pipe external casing packer Pending CN104563953A (en)

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

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Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

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Application publication date: 20150429