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US 2023/0416587 A1Published application
C-36 dimer diamine hydrochloride salt as primary viscosifier for invert-emulsion drilling fluids
AssigneeSaudi Arabian Oil Company
InventorsVikrant Wagle, Abdullah Saleh Hussain Al-Yami, Omprakash Pal, Ali Mohammed Hussain Al Safran, Khawlah Alanqari
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Abstract
Methods for making and using an invert-emulsion drilling fluid, and the invert-emulsion drilling fluid are provided. An exemplary invert-emulsion drilling fluid includes a C-36 dimer diamine dihydrochloride salt (CDDH), an aqueous solvent, a non-aqueous solvent, an emulsifier, and calcium chloride.
Claims20
A method for preparing an invert-emulsion drilling fluid, comprising:
- reacting a C-36 dimer diamine with hydrochloric acid to form a C-36 dimer diamine dihydrochloride salt (CDDH);
- mixing a non-aqueous solvent with an emulsifier to form an initial mixture;
- dissolving calcium chloride in water to form a calcium chloride solution;
- dissolving the CDDH in the calcium chloride solution to form a CDDH solution;
- and
- mixing the CDDH solution with the initial mixture while stirring to form the invert-emulsion drilling fluid.
3 more elements
An invert-emulsion drilling fluid, comprising:
- a C-36 dimer diamine dihydrochloride salt (CDDH);
- an aqueous solvent;
- a non-aqueous solvent;
- an emulsifier;
- and
- calcium chloride.
3 more elements
A method for drilling a wellbore with an invert-emulsion drilling fluid, comprising:
- preparing the invert-emulsion drilling fluid by:
- reacting a C-36 dimer diamine with hydrochloric acid to form a C-36 dimer diamine dihydrochloride salt (CDDH);
- dissolving the CDDH in water to form a CDDH solution;
- dissolving calcium chloride in the CDDH solution;
- mixing an emulsifier with a nonaqueous solvent to form an initial mixture;
- adding the CDDH solution to the initial mixture to form the invert-emulsion drilling fluid;
- adding drilling fluid additives to the invert-emulsion drilling fluid to form a drilling mud;
- and
- using the drilling mud to remove cuttings from the wellbore during drilling.
6 more elements
Dependencies are inferred from the claim text.