Non-Damaging Fluid-Loss Pill and Method of Using the Same

Details Non-Damaging Fluid-Loss Pill and Method of Using the Same Non-Damaging Fluid-Loss Pill and Method of Using the Same

2007-04-24

2007-04-24

Suchfield, George (Department: 3676)

Wells

Processes

Cementing, plugging or consolidating

C166S305100, C507S240000, C507S244000, C507S259000

Reexamination Certificate

active

11422760

ABSTRACT:
A fluid-loss pill that includes a brine solution and an effective amount of a viscoelastic surfactant is disclosed. The viscoelastic surfactant preferably includes at least one compound selected from the family of compounds described bywhere R1, R2, R3, R4and R5are carbon atom or carbon chains, saturated or unsaturated, single or multiple unsaturation, straight chain, branched chain or cyclic including aromatic or alicyclic groups, and R1contains 16–26 carbon atoms, R2contains 2–10 carbon atoms, R3, R4and R5contains 1–6 carbon atoms. Methods of treating a well that include injecting fluid-loss pill into a well to control lost-circulation or to kill a well.

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patent: 6767869 (2004-07-01), DiLullo et al.

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