Composition and use therof, oil-based drilling fluid and a method for raising shearing force of oil-based drilling fluid
First Claim
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1. An oil-based drilling fluid comprising a composition comprising at least two selected from the group of amphiphilic block copolymer, polyurethane and acidic ionic compound,wherein the amphiphilic block copolymer having at least one of the structures shown in the following structural formulae (1), (2) and (3):
-
Am-Bn
(1)
B′
n′
-A′
m′
-B″
n″
(2)
A″
m″
-B′
″
n′
″
-A″
′
′
″
(3)wherein each of A, A′
, A″ and
A″
′
denotes a hydrophilic repeat unit, each of B, B′
, B″ and
B″
′
denotes a hydrophobic repeat unit, and m, n, m′
, n′
, m″
, n″
, m′
″ and
n′
″
are numbers of repeat units and in a range of 10-200;
wherein the acidic ionic compound comprising two or more than two acid radical anions, and at least two acid radical anions are at the two ends of the acidic ionic compound respectively; and
wherein on the basis of the total amount of the composition, the content of the amphiphilic block copolymer is 10-50 wt %, and the content of polyurethane is 50-90 wt %;
orthe content of the amphiphilic block copolymer is 10-50 wt %, and the content of acidic ionic compound is 50-90 wt %;
orthe content of the polyurethane is 55-95 wt %, and the content of acidic ionic compound is 5-45 wt %;
orthe content of the amphiphilic block copolymer is 5-25 wt %, the content of the polyurethane is 55-75 wt %, the content of acidic ionic compound is 10-25 wt %.
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Abstract
A composition and use thereof are disclosed herein. The composition comprises at least two selected from the group of amphiphilic block copolymer, polyurethane and acidic ionic compound. Also an oil-based drilling fluid comprising the composition and a method improving shearing force of oil-based drilling fluid are disclosed. The composition disclosed herewith can raise the shearing force of oil-based drilling fluid.
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17 Claims
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1. An oil-based drilling fluid comprising a composition comprising at least two selected from the group of amphiphilic block copolymer, polyurethane and acidic ionic compound,
wherein the amphiphilic block copolymer having at least one of the structures shown in the following structural formulae (1), (2) and (3): -
Am-Bn
(1)
B′
n′
-A′
m′
-B″
n″
(2)
A″
m″
-B′
″
n′
″
-A″
′
′
″
(3)wherein each of A, A′
, A″ and
A″
′
denotes a hydrophilic repeat unit, each of B, B′
, B″ and
B″
′
denotes a hydrophobic repeat unit, and m, n, m′
, n′
, m″
, n″
, m′
″ and
n′
″
are numbers of repeat units and in a range of 10-200;wherein the acidic ionic compound comprising two or more than two acid radical anions, and at least two acid radical anions are at the two ends of the acidic ionic compound respectively; and wherein on the basis of the total amount of the composition, the content of the amphiphilic block copolymer is 10-50 wt %, and the content of polyurethane is 50-90 wt %;
orthe content of the amphiphilic block copolymer is 10-50 wt %, and the content of acidic ionic compound is 50-90 wt %;
orthe content of the polyurethane is 55-95 wt %, and the content of acidic ionic compound is 5-45 wt %;
orthe content of the amphiphilic block copolymer is 5-25 wt %, the content of the polyurethane is 55-75 wt %, the content of acidic ionic compound is 10-25 wt %. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification