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US 12,624,271 B2Granted
Methods for freeing differentially stuck pipes
AssigneeSaudi Arabian Oil Company
InventorsHasmukh A. Patel, Ahmet Atilgan, Nicolas Osorio Labrador, Qusai Darugar
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Abstract
Methods for freeing differentially stuck pipes may comprise introducing a spotting fluid composition in the vicinity of a portion of a differentially stuck pipe in a well, such that the spotting fluid contacts a material surrounding the portion of the differentially stuck pipe. The spotting fluid may comprise about 0.01 M to about 5 M of an oxidative agent comprising a metal ferrate(VI) and an aqueous solution.
Claims20
A method comprising:
- introducing a spotting fluid composition in the vicinity of a portion of a differentially stuck pipe in a well, such that the spotting fluid contacts a material surrounding the portion of the differentially stuck pipe, the spotting fluid composition comprising:
- about 0.01 M to about 5 M of an oxidative agent comprising a metal ferrate(VI);
- and
- an aqueous alkaline solution.
1 more element
A method comprising:
- introducing a spotting fluid composition in the vicinity of a portion of a differentially stuck pipe in a well having a downhole pressure of about 50 psi to about 1,500 psi, such that the spotting fluid contacts a filter cake surrounding the portion of the differentially stuck pipe, the spotting fluid composition comprising:
- about 0.01 M to about 5 M of an oxidative agent comprising potassium ferrate, sodium ferrate, or a combination thereof;
- and
- an aqueous alkaline solution comprising potassium hydroxide;
- wherein the spotting fluid has a pH of about 4 to about 11 and is able to withstand a temperature of about 70° F. to about 250° F.;
- and
- allowing the spotting fluid composition to interact with the filter cake surrounding the portion of the differentially stuck pipe over a period of time, wherein after the period of time, the spotting fluid composition contributes to a degradation of the filter cake surrounding the portion of differentially stuck pipe.
4 more elements
Dependencies are inferred from the claim text.