Drilling fluids and method of drilling

Details Drilling fluids and method of drilling Drilling fluids and method of drilling

2006-10-17

2006-10-17

Tucker, Philip C. (Department: 1712)

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

C507S136000, C507S138000, C516S021000

Reexamination Certificate

active

07122507

ABSTRACT:
Drilling, completing or workover of a well, particularly an oil and/or gas well, is carried out using a fluid which includes a continuous phase including an ester of the formula (I): (R2)p-Ph-(CH2)m—COO-(AO)n-R1where R1, AO, n, m, Ph, R2and p have defined meanings and particularly where the esters are alkyl or alkenyl benzoate esters. These esters are beneficial by having a range of viscosities, especially extending to low viscosities, and attractive toxicological and environmental profiles for use in drilling, completion and/or workover of wells.

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