GB872345A - Improvements relating to collar assemblies for mounting on well pipes or casings - Google Patents

Improvements relating to collar assemblies for mounting on well pipes or casings

Info

Publication number
GB872345A
GB872345A GB1498159A GB1498159A GB872345A GB 872345 A GB872345 A GB 872345A GB 1498159 A GB1498159 A GB 1498159A GB 1498159 A GB1498159 A GB 1498159A GB 872345 A GB872345 A GB 872345A
Authority
GB
United Kingdom
Prior art keywords
collar
rings
cavity
pipe
helical coil
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
Application number
GB1498159A
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.)
JESSE ELMER HALL
JOHN ALLEN HALL
Original Assignee
JESSE ELMER HALL
JOHN ALLEN HALL
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 JESSE ELMER HALL, JOHN ALLEN HALL filed Critical JESSE ELMER HALL
Priority to GB1498159A priority Critical patent/GB872345A/en
Publication of GB872345A publication Critical patent/GB872345A/en
Expired legal-status Critical Current

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
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/02—Scrapers specially adapted therefor

Abstract

872,345. Wells. HALL, J. E., and HALL, J. A. May 1, 1959, No. 14981/59. Class 85. A stop collar assembly comprises a collar 22 adapted to be fitted on a well pipe 21 to form a cavity which is arched in longitudinal section, a pair of wedging rings 23 adapted to be mounted within the the cavity and encircling the pipe, and thrust means 25 adapted to be received in the cavity and to urge the rings apart to wedge the collar on the pipe. The rings which comprise a solid core surrounded by a helical coil are split so that they may be mounted on the collar before being fed into the cavity through an aperture 24 (see Fig. 1). The thrust means comprises a helical coil which is held in an expanded condition by a member 26 to permit mounting on the pipe prior to feeding into the cavity through the aperture. An end of the coil 25 is released from the member 26 and is fed into the cavity between the rings by rotating the collar. The collar is locked into position on the pipe by threading studs (not shown) into holes 28a, the studs having tapered ends which wedge between coils of the means 25. In a modification the collar has a cylindrical outer surface permitting the rings and the thrust means to be intially carried on the collar, the means being formed of a number of split rings. In a further modification the rings and means are combined in a single helical coil. The collar may be formed of two parts hinged together and all the rings may also be formed in two parts. Two collar assemblies may be carried one at either end of a casing centralizer.
GB1498159A 1959-05-01 1959-05-01 Improvements relating to collar assemblies for mounting on well pipes or casings Expired GB872345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1498159A GB872345A (en) 1959-05-01 1959-05-01 Improvements relating to collar assemblies for mounting on well pipes or casings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1498159A GB872345A (en) 1959-05-01 1959-05-01 Improvements relating to collar assemblies for mounting on well pipes or casings

Publications (1)

Publication Number Publication Date
GB872345A true GB872345A (en) 1961-07-05

Family

ID=10050960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1498159A Expired GB872345A (en) 1959-05-01 1959-05-01 Improvements relating to collar assemblies for mounting on well pipes or casings

Country Status (1)

Country Link
GB (1) GB872345A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6957704B2 (en) 2003-05-14 2005-10-25 Halliburton Energy Services Inc. Limit clamp for use with casing attachments
WO2018085463A1 (en) * 2016-11-02 2018-05-11 Centergenics, LLC Tubular gripping device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6957704B2 (en) 2003-05-14 2005-10-25 Halliburton Energy Services Inc. Limit clamp for use with casing attachments
WO2018085463A1 (en) * 2016-11-02 2018-05-11 Centergenics, LLC Tubular gripping device
GB2571038A (en) * 2016-11-02 2019-08-14 Centergenics Llc Tubular gripping device
US10801272B2 (en) 2016-11-02 2020-10-13 Centergenics, LLC Tubular gripping device
RU2747187C2 (en) * 2016-11-02 2021-04-29 Сентердженикс, Ллк Pipe gripper
GB2571038B (en) * 2016-11-02 2021-10-06 Centergenics Llc Tubular gripping device

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