Adjustable bent sub

Details Adjustable bent sub Adjustable bent sub

1988-04-14

1989-03-21

Novosad, Stephen J.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Sectional guide or shaft having means to lock sections in...

175 61, 175320, 166237, 285 93, 285184, E21B 708

Patent

active

048134970

ABSTRACT:
There is disclosed an adjustable bent sub for use in directional drilling in earth formations which is adapted to be placed between the power unit and bearing assembly components of a downhole motor and which can be angularly adjusted without requiring disassembly of the downhole motor unit. The bent sub is comprised of a first member having a primary axis and an external, cylindrical surface defining a secondary axis disposed at a predetermined offset angle with respect to the primary axis; a tubular second member secured to the first member against axial displacement and having a primary axis, an internal, cylindrical surface defining a secondary axis disposed at a predetermined offset angle with respect to the second member primary axis, the internal surface being adapted to telescopically receive the first member external surface in sliding fit relation for rotation about the secondary axis, and a first clutch extending axially from one end thereof; a locking sleeve telescopically receiving and non-rotatably coupled to the external surface of the first member and having a second clutch extending axially of one end thereof toward the second member, the sleeve being axially moveable on the first member between an engaged position whereat the first and second clutch are interengaged and non-rotatably couple the second member and the first member in a predetermined angular position and a disengaged position whereat the locking sleeve is axially displaced from the second member and the first and second clutch are disengaged from one another so as to permit angular adjustment of the second member with respect to the first member; and threads on the external surface of the first member for securing the sleeve in the engaged position thereof.

REFERENCES:
patent: 4067404 (1978-01-01), Crase
patent: 4077657 (1978-03-01), Trzeciak
patent: 4220214 (1980-09-01), Benoit
patent: 4286676 (1981-09-01), Nguyen et al.
patent: 4303135 (1981-12-01), Benoit

Affiliated with

Also associated with

Rating

Adjustable bent sub does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adjustable bent sub, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable bent sub will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-471380