EP3833846A1 - Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure - Google Patents
Centralizer having atmospheric chamber for expansion in response to hydrostatic pressureInfo
- Publication number
- EP3833846A1 EP3833846A1 EP19773521.0A EP19773521A EP3833846A1 EP 3833846 A1 EP3833846 A1 EP 3833846A1 EP 19773521 A EP19773521 A EP 19773521A EP 3833846 A1 EP3833846 A1 EP 3833846A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- centralizer
- casing
- mandrel
- liner string
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
- E21B17/1021—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs
- E21B17/1028—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well with articulated arms or arcuate springs with arcuate springs only, e.g. baskets with outwardly bowed strips for cementing operations
Definitions
- Figures 2A, 2B, and 3A illustrate a typical one of the centralizers in the retracted position.
- a lip of each end ring 5p,w extending past the respective collar 4p,w may be split into a multitude of tabs (before or after insertion of the collars) and the tabs may be bent over the respective collar, thereby mounting the collars to the body 5 (in addition to the spot welds).
- the anchor 10 may include a locking ring 10r and a plurality of set screws 10s.
- the locking ring 10r may have a plurality of threaded sockets formed through a wall thereof and spaced therearound. The set screws 10s may be driven into the threaded sockets and into engagement with a periphery of the casing or liner string 1 , thereby mounting the locking ring 10r to the casing or liner string.
- the inner surface of the head of the piston 7p may have a straight portion for receiving the dogs 6 and the outer surface of each dog may have a straight portion for engagement with the straight portion of the head or the inner surface of the head of the piston may be partially straight and partially conical and the outer surface of each dog may be partially straight and partially inclined.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201862717324P | 2018-08-10 | 2018-08-10 | |
PCT/IB2019/056329 WO2020031010A1 (en) | 2018-08-10 | 2019-07-24 | Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3833846A1 true EP3833846A1 (en) | 2021-06-16 |
Family
ID=68051845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19773521.0A Withdrawn EP3833846A1 (en) | 2018-08-10 | 2019-07-24 | Centralizer having atmospheric chamber for expansion in response to hydrostatic pressure |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210270092A1 (en) |
EP (1) | EP3833846A1 (en) |
CN (1) | CN112534115A (en) |
EA (1) | EA202190187A1 (en) |
WO (1) | WO2020031010A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113356769B (en) * | 2021-07-02 | 2022-12-30 | 中国农业大学 | Variable-diameter shape memory alloy centralizer and centralizing performance testing method |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4523640A (en) | 1984-01-23 | 1985-06-18 | Dresser Industries, Inc. | Arm release system for well logging apparatus |
US5086844A (en) * | 1989-10-10 | 1992-02-11 | Union Oil Company Of California | Hydraulic release oil tool |
DE69107833T2 (en) * | 1990-01-17 | 1995-11-09 | Weatherford Lamb Inc N D Ges D | CENTERING DEVICE FOR OIL FIELD LINING PIPE. |
US5097905A (en) | 1991-01-28 | 1992-03-24 | Mobil Oil Corporation | Centralizer for well casing |
EP2604785A1 (en) | 2008-09-29 | 2013-06-19 | Frank's International, Inc. | Downhole device actuator and method |
GB201100543D0 (en) * | 2011-01-13 | 2011-03-02 | Downhole Products Ltd | Centraliser |
US9580976B1 (en) | 2013-03-14 | 2017-02-28 | Sandia Corporation | Deployable centralizers |
WO2015017568A2 (en) | 2013-07-30 | 2015-02-05 | Weatherford/Lamb, Inc. | Centralizer |
SE1451379A1 (en) * | 2014-11-17 | 2016-05-18 | Vanguard Oil Tools & Services Llc | Temperature activated zonal isolation packer |
-
2019
- 2019-07-24 EP EP19773521.0A patent/EP3833846A1/en not_active Withdrawn
- 2019-07-24 CN CN201980051276.3A patent/CN112534115A/en active Pending
- 2019-07-24 EA EA202190187A patent/EA202190187A1/en unknown
- 2019-07-24 US US17/259,643 patent/US20210270092A1/en not_active Abandoned
- 2019-07-24 WO PCT/IB2019/056329 patent/WO2020031010A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN112534115A (en) | 2021-03-19 |
WO2020031010A1 (en) | 2020-02-13 |
EA202190187A1 (en) | 2021-07-21 |
US20210270092A1 (en) | 2021-09-02 |
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Legal Events
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Effective date: 20221222 |