Arrangement for cleaning internal surface of casing strings

Details Arrangement for cleaning internal surface of casing strings Arrangement for cleaning internal surface of casing strings

E - Fixed Constructions

21

B

257/1, 166/57, 1

E21B 37/02 (2006.01)

Patent

CA 1291946

Abstract of the Disclosure An arrangement for cleaning the internal surface of casing strings, comprises a hollow cylindrical body with slots provid- ed around the periphery thereof. The slots accommodate extend- able cutting blades. The cutting blades are moved with the aid of walls of an elastic vessel. The elastic vessel is disposed inside the body and adapted to be communicated with a source of compressed fluid medium. The elastic vessel is disposed in a bushing installed coaxially with the body and provided with longitudinal ports. The ports are arranged opposite to the slots of the body and are equipped with flat spring elements. The flat spring elements substantially completely cover the ports of the bushing and cooperate by one side with the cutting blad- es and by the other side, with the elastic vessel.

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