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US 5,307,877 AGranted
Wellbore sealing with two-component ionomeric system
AssigneeShell Oil Company
InventorsKenneth M. Cowan, Arthur H. Hale
Life of this patent
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Abstract
A drilling and cementing process wherein a drilling fluid containing a metal compound which is a proton acceptor component is utilized and thereafter combined with a water-soluble or water-dispersable polymer of the formula ##STR1## wherein A is ##STR2## or a mixture of ##STR3## and, wherein R is hydrogen or 1-10 carbon atom alkyl radical, to give a cementitious slurry which is thereafter used in a cementing operation.
Claims20
A method for drilling and cementing a well, comprising:
- combining constituents comprising water and a proton acceptor metal compound to produce a drilling fluid;
- thereafter utilizing said drilling fluid in a well drilling operation to form a borehole, thus producing a used drilling fluid;
- thereafter combining said used drilling fluid with 10 to 200 weight percent based on the weight of said metal compound, of a polymeric component selected from the group consisting of watersoluble polymers and water-dispersable polymers, said polymeric component being represented by the formula ##STR10## wherein A is ##STR11## or a mixture of ##STR12## wherein R is a hydrogen or 1-10 carbon atom alkyl radical to produce a cementitious slurry the ratio of m to n is between 0:1 and 100:1;
- and
- utilizing said cementitious slurry in a cementing operation.
2 more elements
A method for drilling and cementing a well having a restricted annulus, comprising:
- combining constituents comprising water and a proton acceptor metal compound to produce a drilling fluid;
- thereafter utilizing said drilling fluid in a well drilling operation to form a borehole, thus producing a used drilling fluid;
- thereafter combining said used drilling fluid with 10-200 weight percent based on the weight of said metal compound of a polymeric component selected from the group consisting of watersoluble polymers and water.dispersable polymers, said polymeric component being represented by the formula ##STR13## wherein A is ##STR14## or a mixture of ##STR15## wherein R is hydrogen or 1-10 carbon atom alkyl radical to produce a cementitious slurry, the ratio of m to n is between 0:1 and 100:1;
- and
- utilizing said cementitious slurry in cementing said restricted annulus.
2 more elements
A method for drilling and cementing a well, comprising
- combining constituents comprising water and a proton acceptor metal compound to produce a drilling fluid;
- utilizing said drilling fluid in a well drilling operation to form a borehole, thus laying down a filter cake and producing a used drilling fluid;
- contacting said filter cake with a polymeric component selected from the group consisting of water-soluble polymers and water-dispersable polymers, said polymeric component being represented by the formula ##STR16## wherein A is ##STR17## or a mixture of ##STR18## wherein R is hydrogen or 1-10 carbon atom alkyl radical, the ratio of m to n is between 0:1 and 100:1;
- disposing a pipe in said borehole;
- passing a cementitious slurry down said pipe;
- and
- displacing said cementitious slurry out of said pipe and into an annulus surrounding said pipe with a displacement fluid.
4 more elements
Dependencies are inferred from the claim text.