GB8802498D0 - Improvements relating to valves - Google Patents

Improvements relating to valves

Info

Publication number
GB8802498D0
GB8802498D0 GB888802498A GB8802498A GB8802498D0 GB 8802498 D0 GB8802498 D0 GB 8802498D0 GB 888802498 A GB888802498 A GB 888802498A GB 8802498 A GB8802498 A GB 8802498A GB 8802498 D0 GB8802498 D0 GB 8802498D0
Authority
GB
United Kingdom
Prior art keywords
valves
improvements relating
relating
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
GB888802498A
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.)
HY RAM ENG CO Ltd
Original Assignee
HY RAM ENG CO Ltd
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 HY RAM ENG CO Ltd filed Critical HY RAM ENG CO Ltd
Priority to GB888802498A priority Critical patent/GB8802498D0/en
Publication of GB8802498D0 publication Critical patent/GB8802498D0/en
Priority to GB8902378A priority patent/GB2215369A/en
Pending legal-status Critical Current

Links

GB888802498A 1988-02-04 1988-02-04 Improvements relating to valves Pending GB8802498D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB888802498A GB8802498D0 (en) 1988-02-04 1988-02-04 Improvements relating to valves
GB8902378A GB2215369A (en) 1988-02-04 1989-02-03 Drill string circulating valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888802498A GB8802498D0 (en) 1988-02-04 1988-02-04 Improvements relating to valves

Publications (1)

Publication Number Publication Date
GB8802498D0 true GB8802498D0 (en) 1988-03-02

Family

ID=10631058

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888802498A Pending GB8802498D0 (en) 1988-02-04 1988-02-04 Improvements relating to valves
GB8902378A Withdrawn GB2215369A (en) 1988-02-04 1989-02-03 Drill string circulating valve

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB8902378A Withdrawn GB2215369A (en) 1988-02-04 1989-02-03 Drill string circulating valve

Country Status (1)

Country Link
GB (2) GB8802498D0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8909892D0 (en) * 1989-04-28 1989-06-14 Exploration & Prod Serv Well control apparatus
GB2315082B (en) * 1996-07-10 2000-12-06 Klaas Johannes Zwart Downhole apparatus
GB9715930D0 (en) * 1997-07-28 1997-10-01 Smith International Bypass valve closing means
GB2346397A (en) * 1999-02-03 2000-08-09 Sofitech Nv Annulus pressure activated discharge valve for enhanced fluid return flow

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970147A (en) * 1975-01-13 1976-07-20 Halliburton Company Method and apparatus for annulus pressure responsive circulation and tester valve manipulation
US3981360A (en) * 1975-07-30 1976-09-21 Cook Testing Co. Well tubing drain
US4324293A (en) * 1980-04-29 1982-04-13 Halliburton Services Circulation valve
BR8502716A (en) * 1984-06-08 1986-02-12 Soderberg Res & Dev UNION INCLUDING A GEM TUBE SEWER VALVE SUITABLE FOR USE IN A PROBE HOLE TUBE COLUMN, GEM TUBE SEWER VALVE SUITABLE FOR USE IN A PROBE HOLE TUBE COLUMN, SUITABLE TUBE COLUMN FOR USE IN A FITTING COLUMN PROBE AND PROCESS TO OPERATE A VALVE DEVICE

Also Published As

Publication number Publication date
GB8902378D0 (en) 1989-03-22
GB2215369A (en) 1989-09-20

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