Composition for making a drilling fluid a non-invasive drilling fluid
AssigneeEuropean Mud Company AS
InventorsJan Kristian Vasshus, Karl Ronny Klungtvedt, Swapan Kumar Mandal
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Abstract
A composition is for making a drilling fluid a non-invasive drilling fluid. The composition has a first component comprising particles having a scratch hardness above 2 Mohs and a second component comprising particles selected from the group of fragmented seeds of Tamarindus indica, comminuted bark from Litsea glutinosa, or comminuted Ocimum tenuiflorum. Also disclosed is a non-invasive drilling fluid having the composition, and a method for drilling a wellbore.
Claims19
A method of drilling a wellbore, the method comprising pumping a drilling fluid into the wellbore during drilling of the wellbore, the drilling fluid comprising a composition having a first component comprising particles having a scratch hardness above 2 Mohs and a second component comprising particles of comminuted whole seeds, with their testa, of Tamarindus indica, wherein the second component comprises comminuted components from the testa and kernel of the whole Tamarindus indica seeds in about the same proportions as those components are found in the whole Tamarindus indica seeds prior to being comminuted, the composition being configured to form an impermeable film on a surface of the wellbore and thereby substantially prevent fluid loss through porous portions of the wellbore.
Dependencies are inferred from the claim text.