Downhole tool

Details Downhole tool Downhole tool

E - Fixed Constructions

21

B

E21B 21/10 (2006.01)

Patent

CA 2546358

A downhole tool (10) comprises a body (12) defining a bore. The body includes a valve arrangement (18) including flow ports (24) in the wall of the body. The ports may be opened or closed. In addition, a variable flow restriction (30) is provided in the bore (14), the degree of restriction tending to decrease as flow across the restriction increases. The variable flow restriction may be utilised to actuate the valve arrangement.

L'invention concerne un outil de fond (10) doté d'un corps (12) formant un puits de forage. Ce corps comprend un mécanisme soupape (18) comportant des orifices d'écoulement (24) formés dans la paroi du corps. Ces orifices peuvent être ouverts ou fermés. Le puits (14) comporte également un dispositif limiteur de débit réglable (30), la limitation du débit tendant à réduire à mesure que le débit dans le dispositif limiteur augmente. Ce dispositif limiteur réglable peut être utilisé pour actionner le mécanisme soupape.

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