GB2345510B - Pressure modulation valve assembly - Google Patents

Pressure modulation valve assembly

Info

Publication number
GB2345510B
GB2345510B GB0007154A GB0007154A GB2345510B GB 2345510 B GB2345510 B GB 2345510B GB 0007154 A GB0007154 A GB 0007154A GB 0007154 A GB0007154 A GB 0007154A GB 2345510 B GB2345510 B GB 2345510B
Authority
GB
United Kingdom
Prior art keywords
valve assembly
modulation valve
pressure modulation
pressure
assembly
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 - Fee Related
Application number
GB0007154A
Other versions
GB2345510A (en
GB0007154D0 (en
Inventor
Roger W Fincher
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.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
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 Baker Hughes Inc filed Critical Baker Hughes Inc
Priority claimed from GB9818238A external-priority patent/GB2328464B/en
Publication of GB0007154D0 publication Critical patent/GB0007154D0/en
Publication of GB2345510A publication Critical patent/GB2345510A/en
Application granted granted Critical
Publication of GB2345510B publication Critical patent/GB2345510B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • 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
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/18—Anchoring or feeding in the borehole
    • 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
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • 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
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • E21B44/005—Below-ground automatic control systems
    • 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
GB0007154A 1997-08-20 1998-08-20 Pressure modulation valve assembly Expired - Fee Related GB2345510B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5659197P 1997-08-20 1997-08-20
GB9818238A GB2328464B (en) 1997-08-20 1998-08-20 Downhole drilling assembly

Publications (3)

Publication Number Publication Date
GB0007154D0 GB0007154D0 (en) 2000-05-17
GB2345510A GB2345510A (en) 2000-07-12
GB2345510B true GB2345510B (en) 2000-09-13

Family

ID=26314246

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0007154A Expired - Fee Related GB2345510B (en) 1997-08-20 1998-08-20 Pressure modulation valve assembly

Country Status (1)

Country Link
GB (1) GB2345510B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038653A2 (en) * 1995-05-31 1996-12-05 Shell Internationale Research Maatschappij B.V. Device for controlling the weight on an earth drill bit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996038653A2 (en) * 1995-05-31 1996-12-05 Shell Internationale Research Maatschappij B.V. Device for controlling the weight on an earth drill bit

Also Published As

Publication number Publication date
GB2345510A (en) 2000-07-12
GB0007154D0 (en) 2000-05-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070820