Method and combination of materials for releasing a stuck pipe

Details Method and combination of materials for releasing a stuck pipe Method and combination of materials for releasing a stuck pipe

E - Fixed Constructions

21

B

E21B 31/00 (2006.01) C09K 8/04 (2006.01) E21B 31/03 (2006.01)

Patent

CA 2181790

A method and combination of materials for freeing stuck pipe involves first the spotting of a clear brine, preferably calcium chloride, calcium bromide or zinc bromide, or mixtures thereof, for a given period of time, preferably at least about 8 hours, in the stuck region of the pipe, followed by the spotting of a spotting agent selected from wetting agents, surfactants, lubricants, or mixtures thereof, in the stuck region of the pipe.

Procédé et combinaison de matériels servant à dégager un tube grippé consistant d'abord à injecter dans la région concernée du tube une solution fluide de préférence de chlorure de calcium, de bromure de calcium, de bromure de zinc ou leur mélange et à l'y laisser pendant une durée donnée, de préférence d'au moins 8 heures, puis à injecter un dégrippant pouvant être un mouillant, un tensioactif, un lubrifiant ou leur mélange dans la zone grippée.

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