EP 0166568 A3 19870429 - CEMENT COLLAR AND METHOD OF USE

Title (en)

CEMENT COLLAR AND METHOD OF USE

Publication

EP 0166568 A3 19870429 (EN)

Application

EP 85304357 A 19850618

Priority

US 62488484 A 19840627

Abstract (en)

[origin: EP0166568A2] A cementing collar for inclusion in a well casing to permit primary multiple stage cementing comprises a tubular housing (12, 40, 64), a cementing port (52) and sleeve means (200) inside the housing and slidable in response to pressure changes to open and close the port.

IPC 1-7

E21B 33/16; E21B 34/14

IPC 8 full level

E21B 33/16 (2006.01); E21B 34/10 (2006.01); E21B 34/14 (2006.01)

CPC (source: EP US)

E21B 33/16 (2013.01 - EP US); E21B 34/103 (2013.01 - EP); E21B 34/142 (2020.05 - EP US)

Citation (search report)

[X] GB 2080365 A 19820203 - VANN ROY RANDELL, et al
[X] US 4429747 A 19840207 - WILLIAMSON JR JIMMIE R [US]
[YD] US 3768556 A 19731030 - BAKER E
[A] US 4332298 A 19820601 - KUUS FELIX, et al
[AD] US 3811500 A 19740521 - MORRISETT O, et al
[AD] US 4246968 A 19810127 - JESSUP ROBERT L, et al

Designated contracting state (EPC)

AT DE FR GB IT NL

DOCDB simple family (publication)

EP 0166568 A2 19860102; EP 0166568 A3 19870429; AU 4310785 A 19860102

DOCDB simple family (application)

EP 85304357 A 19850618; AU 4310785 A 19850529