US 2004/0159465 A1Published application

Drilling method

AssigneeCoupler Developments Limited

InventorLaurence John Ayling

Life of this patent

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Abstract

A system and method is disclosed for continuously supplying drilling fluid down a bore hole while adding or removing tubulars.

Claims5

Dependent claims

A method for drilling wells in which a drill bit is rotated at the end of a drill string comprising tubular members joined together and mud is circulated through the tubular drill string, in which method tubular members are added to or removed from the drill string whilst circulation of mud continues.

Dependencies are inferred from the claim text.

Facts

Application: 10/782,016Filed 19 Feb 2004
Priority: GB 98 22303.514 Oct 1998
Published: 19 Aug 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

E21B 33/068
Well heads; Setting-up thereof: having provision for introducing objects or fluids into, or removing objects from, wells
E21B 19/16
Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables: connecting or…
E21B 21/019
Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes: arrangements for maintaining circulation of drilling…
E21B 21/085
Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure:…

Family

Application09/807,476Continuation · filed 14 Apr 2001
Application10/782,016Continuation · filed 19 Feb 2004
US 6,591,916 B1Related patent
US 7,188,683 B2Related patent
US 2004/0159465 A1This patent

From the US filing history. Foreign family members aren’t listed.

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