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US 8,136,594 B2Granted
Methods and apparatuses for releasing a chemical into a well bore upon command
AssigneeHalliburton Energy Services, Inc.
InventorsSteven G. Streich, Roger L. Schultz, Lance E. Brothers, Sam J. Lewis
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Abstract
Methods and apparatuses for releasing a chemical in a well bore are disclosed. One apparatus includes a curved member configured for coupling to a casing, and a hollow member is connected to the curved member. A chemical container is disposed, at least in part, within the hollow space, and the hollow member extends at least partially around a hollow space.
Claims19
A method for releasing a chemical in a well bore, comprising the steps of:
- providing a casing string;
- coupling a housing member to the casing string, wherein the housing member is coupled to a chemical reservoir, wherein the housing member and the casing string are configured so that rotation of the casing string and a cutting instrument coupled to the casing string initiates the releasing of the chemical from the chemical reservoir;
- introducing a fluid into a space between an inner surface of the well bore and an outer surface of the casing string;
- releasing a chemical from the chemical reservoir into the fluid;
- wherein the fluid comprises a non-activated cementitious material and wherein the chemical comprises an activation agent;
- and
- wherein the chemical is first introduced into the fluid upon its release from the chemical reservoir into the fluid in the space between the inner surface of the well bore and the outer surface of the casing string.
4 more elements
A method for releasing a chemical in a well bore, comprising the steps of:
- providing a casing string;
- coupling a housing member to the casing string, wherein the housing member is coupled to a chemical reservoir, wherein the housing member and the casing string are configured so that rotation of the casing string actuates a pump coupled to the chemical reservoir;
- introducing a fluid into a space between an inner surface of the well bore and an outer surface of the casing string;
- releasing a chemical from the chemical reservoir into the fluid, wherein the releasing of the chemical from the chemical reservoir comprises actuating the pump coupled to the chemical reservoir;
- wherein the fluid comprises a non-activated cementitious material and wherein the chemical comprises an activation agent;
- and
- wherein the chemical is first introduced into the fluid upon its release from the chemical reservoir into the fluid in the space between the inner surface of the well bore and the outer surface of the casing string.
4 more elements
A method for releasing a chemical in a well bore, comprising the steps of:
- providing a casing string;
- coupling a housing member to the casing string, wherein the housing member is coupled to a chemical reservoir;
- introducing a fluid into a space between an inner surface of the well bore and an outer surface of the casing string;
- releasing a chemical from the chemical reservoir into the fluid after the fluid is introduced into the space between the inner surface of the well bore and the outer surface of the casing string, wherein the releasing of the chemical from the chemical reservoir comprises actuating a pump coupled to the chemical reservoir;
- wherein:
- the fluid comprises a non-activated cementitious material and wherein the chemical comprises an activation agent;
- the step of releasing the chemical comprises reciprocating the casing string;
- the chemical is first introduced into the fluid upon its release from the chemical reservoir into the fluid in the space between the inner surface of the well bore and the outer surface of the casing string;
- and
- increasing a pressure on a surface of the casing string actuates the pump.
7 more elements
Dependencies are inferred from the claim text.