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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||175/38 ; 175/269 ; 175/3251|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 75 인용 특허 : 0|
The present invention is a device for the remote actuation of equipment (3) associated with a drill string (1) through a hydraulic displacement mechanism (10;53,58) co-operating with a distributor (7;25,26,27;47) associated with the drilling fluid. The displacement mechanism directly converts the hydraulic energy of the drilling fluid into actuating mechanical energy with the co-operation of no other fluid than the drilling fluid. The invention further relates to an actuating method using the device and has an application of directional drilling in the p...
A method comprising: setting, by pumping from the surface, the value of a differential pressure DP to a determined value; controlling a distribution means so as to allow circulation of a drilling fluid under pressure between an inner space and a displacement means; actuating an equipment by activating said displacement means when mechanical energy of the drilling fluid is higher than energy developed by a return means of said displacement means; controlling said distribution means so as to shut off communication between the inner space and said displacem...