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1. (WO2013154435) OIL BASED DRILLING FLUIDS AND MIXTURE FOR USE IN OIL BASED DRILLING FLUIDS

Pub. No.:    WO/2013/154435    International Application No.:    PCT/NO2013/000011
Publication Date: Fri Oct 18 01:59:59 CEST 2013 International Filing Date: Wed Mar 27 00:59:59 CET 2013
IPC: C09K 8/035
C09K 8/34
C08G 65/00
C08L 71/00
Applicants: ELKEM AS
Inventors: AL-BAGOURY, Mohamed
NASR-EL-DIN, Hisham
Title: OIL BASED DRILLING FLUIDS AND MIXTURE FOR USE IN OIL BASED DRILLING FLUIDS
Abstract:
The invention relates to an oil based drilling fluid comprising a weighing agent where the drilling fluid contains alcohol ethoxylates with a molecular weigth between 200 and 2000 Dalton as biodegradeable deflocculant. The invention further relates to a dry mixture for use in oil based drilling fluids comprising a weighting agent and a deflocculating agent where the deflocculating agent is alcohol ethxylate with a molecular weight between 200 and 2000 Dalton.