Processing

Please wait...

PATENTSCOPE will be unavailable a few hours for maintenance reason on Tuesday 26.10.2021 at 12:00 PM CEST
Settings

Settings

Goto Application

1. CA2717813 - CENTERING STRUCTURE FOR TUBULAR MEMBER AND METHOD OF MAKING SAME

Office
Canada
Application Number 2717813
Application Date 02.07.2008
Publication Number 2717813
Publication Date 08.01.2009
Grant Number
Grant Date 29.08.2017
Publication Kind C
IPC
E21B 17/10
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
17Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings
10Wear protectors; Centralising devices
E21B 43/10
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
02Subsoil filtering
10Setting of casings, screens or liners in wells
CPC
E21B 17/1021
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
17Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables;; Casings; Tubings
10Wear protectors; Centralising devices ; , e.g. stabilisers;
1014Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
1021with articulated arms or arcuate springs
Applicants DAVIS-LYNCH, INC.
Priority Data 60/958,076 02.07.2007 US
Title
(EN) CENTERING STRUCTURE FOR TUBULAR MEMBER AND METHOD OF MAKING SAME
(FR) STRUCTURE DE CENTRAGE POUR ELEMENT TUBULAIRE ET SON PROCEDE DE FABRICATION
Abstract
(EN)



An apparatus and method for manufacture of a unitary
centralizer forming Apertures are formed in a blank to create
an intermediate blank having bow spring elements within a unitary
centralizer and expanding a medial portion of the bow spring
elements. An expansion element is inserted into the intermediate
blank. An expansive force is applied to the expansion element,
thereby expanding the medial portion of the bow spring elements.
Mandrels placed against the upper and lower surfaces of the expansion
element receive a compressive force for transfer to the expansion
element. Set screw holes are placed on the unitary centralizer
for attachment.



Related patent documents