US 10,472,958 B2 · Determining spotting fluid properties

Abstract

Techniques for determining properties of a spotting fluid include positioning a member of a test apparatus into a prepared mudcake sample at a specified depth, the mudcake sample associated with a drilling fluid and including a specified thickness; circulating a flow of the spotting fluid to contact the prepared mudcake sample in a test cell; soaking the prepared mudcake sample in the spotting fluid for a specified time duration; subsequent to the specified time duration, detecting a force exerted on the member relative to a displacement distance of the member from the specified depth in the mudcake sample during removal of the member from the mudcake sample; recording, with the test apparatus, the detected force relative to the displacement distance; and determining, with the test apparatus, one or more properties associated with the mudcake sample based on the recorded force relative to the displacement distance.

Claims30

Dependent claims

A method, comprising:

positioning a spherical member of a test apparatus into a prepared mudcake sample at a specified depth of the mudcake sample, the mudcake sample associated with a drilling fluid and comprising a specified thickness;
circulating a flow of a spotting fluid to contact the prepared mudcake sample in a test cell of the test apparatus;
soaking the prepared mudcake sample in the spotting fluid for a specified time duration;
subsequent to the specified time duration, detecting, with the test apparatus, a force exerted on the spherical member relative to a displacement distance of the spherical member from the specified depth in the mudcake sample during removal of the spherical member from the mudcake sample;
recording, with the test apparatus, the detected force relative to the displacement distance;
and
determining, with the test apparatus, one or more properties associated with the mudcake sample based on the recorded force relative to the displacement distance.

4 more elements

A spotting fluid testing system, comprising:

a test apparatus comprising:
a mudcake holder configured to restrain a mudcake sample in a stationary position;
a load cell;
and
a spherical testing member coupled to the load cell;
and
a control system communicably coupled to the test apparatus and configured to perform operations comprising:
controlling the load cell to position the spherical testing member into the mudcake sample at a specified depth of the mudcake sample;
controlling one or more valves of the test apparatus to circulate a flow of a spotting fluid to contact and soak the mudcake sample in a test container of the test apparatus;
subsequent to a specified soaking time duration, controlling the load cell to initiate removal of the spherical testing member from the mudcake sample by a force exerted on the spherical testing member by the load cell;
detecting, with the test apparatus, a force exerted on the spherical testing member relative to a displacement distance of the spherical testing member from the specified depth in the mudcake sample during removal of the spherical testing member from the mudcake sample;
recording, with the test apparatus, the detected force relative to the displacement distance;
and
determining one or more properties of the mudcake sample based on the recorded force relative to the displacement distance.

11 more elements

Dependencies are inferred from the claim text.

Determining spotting fluid properties

Life of this patent

Determining spotting fluid properties

Life of this patent

Abstract

Claims30