초록 ▼

In drilling equipment having at least one remote assembly (62) attached to a drill string (12), an electrically actuated disconnect apparatus and method (10) for releasing the remote assembly (62) has an electric signal transmitter electrically connected to a release device (16). The release device

In drilling equipment having at least one remote assembly (62) attached to a drill string (12), an electrically actuated disconnect apparatus and method (10) for releasing the remote assembly (62) has an electric signal transmitter electrically connected to a release device (16). The release device (16) operates a retaining device (22) holding strainer blocking devices (24) therein. A strainer (56) is connected to the drill string (12) after the retainer (22) and through which drilling fluid flows until blocked by the strainer blocking devices (24). A one way pressure relief mechanism (34) is provided in the drill string (12) conformed to operate when the flow of drilling fluid is continued after the strainer (56) is blocked by the strainer blocking devices (24) so that drilling fluid is allowed to impact against a movable piston (44), the moveable piston (44) conformed to the drill string (12), and movable to apply pressure to move a disconnect shift tube (52) so as to shift the disconnect shift tube (52) and release a coupling key (32), thereby releasing the remote assembly (64) from the drill string (12).

대표청구항 ▼

[ We claim:] [1.] In drilling equipment having at least one remote assembly attached to a drill string, an electrically actuated disconnect apparatus for releasing said remote assembly comprising:(a) a means for transmitting an electric signal;(b) an electrically actuated release means;(c) at least

[ We claim:] [1.] In drilling equipment having at least one remote assembly attached to a drill string, an electrically actuated disconnect apparatus for releasing said remote assembly comprising:(a) a means for transmitting an electric signal;(b) an electrically actuated release means;(c) at least one strainer blocking means retained by said electrically actuated release means until receipt of said electric signal so that said strainer blocking means is released into a flow of drilling fluid;(d) a strainer through which said drilling fluid flows until blocked by said strainer blocking means; and(e) a one way pressure relief means in said drill string conformed to operate when the flow of drilling fluid is continued after said strainer is blocked by said strainer blocking means so that drilling fluid releases said remote assembly from said drill string.