Halliburton Company

Halliburton Energy Services, Inc.

Alireza B Rahimi

Colby M Ross

Patty L Totten

Marlin D Holtmyer

Charles V Hunt

E Dwyann Dalrymple

Jeffrey A Dahl

Mary A Laramay

Thomas A Zeltmann

Murray G Clark

A method of stimulating a subterranean well permits each desired location within a portion of a well to be isolated from other portions of the well during stimulation operations therein, but does not require lining a portion of the well with casing and cement, and does not require the use of sealing devices, such as inflatable packers, in the well portion. In a preferred embodiment, a stimulation method includes the steps of depositing a barrier fluid in a portion of a well, forming a radially extending opening through the fluid, and flowing stimulation fluids through the opening and into a formation surrounding the portion of the well.

Apparatus and methods for stimulating a subterranean well

Hydrocarbon base drilling fluids which are selectively convertible to cementitious compositions that set into hard substantially impermeable masses and methods of using such drilling fluids are provided. The drilling fluids are basically comprised of a hydrocarbon liquid having particulate hydraulic cement suspended therein. The drilling fluids are converted to cementitious compositions by admixing water and a surfactant therewith.

Hydrocarbon base cementitious drilling fluids and methods

The present invention provides a method of treating of subterranean formation using a gel of a graft copolymer of a hydroxyalkyl cellulose, guar or hydroxypropyl guar prepared by a redox reaction with vinyl phosphonic acid. The gel is formed by hydrating the graft copolymer in an aqueous liquid containing at least a trace amount of at least one divalent cation. The gel is crosslinked by the addition of a Lewis base or Bronsted-Lowry base, which is substantially free of polyvalent metal ions, to the gel in an amount sufficient to effect crosslinking of the graft copolymer.

Method of crosslinking cellulose and guar derivatives for treating

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Duncan, OK, United States of America

Alireza B Rahimi