Ykk Corporation

Schlumberger Norge as

Monica Norman

Egil Ronaes

Ole Iacob Prebensen

Anne-Marie Friestad

Kenneth Charles Symes

Kishor Kumar Mistry

David Antony Ballard

Michael A Freeman

Ping Jiang

A pill for wellbore operations, that includes a base fluid; and at least two polymers that interact to form a gelatinous structure characterized as isolating and controllably transmitting hydrostatic pressure between a first wellbore fluid above the pill in a wellbore and a second wellbore fluid below the pill in the wellbore is disclosed.

Fluid pressure transmission pill

Disclosed are methods and related compositions for altering the physical and chemical properties of a substrate used in hydrocarbon exploitation, such as in downhole drilling operations. In a preferred embodiment a method involves formulating a fluid, tailored to the specific drilling conditions, that contains one or more inactivated enzymes. Preferably the enzyme is inactivated by encapsulation in a pH responsive material. After the fluid has been introduced into the well bore, one or more triggering signals, such as a change in pH, is applied to the fluid that will activate or reactivate the inactivated enzyme, preferably by causing it to be released by the encapsulation material. The reactivated enzyme is capable of selectively acting upon a substrate located downhole to bring about the desired change in the chemical or physical properties of the substrate.

Method for the triggered release of polymer-degrading agents for oil field use

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Stavanger, Norway

Monica Norman