Spiral drill collar are a kind of petroleum drilling tool series of
our company. This kind of drill collar is capable of preventing differential
pressure detention of tools during drilling. Spiral grooves will enable the mud
to flow freely around the drill collar to use balance pressure to prevent the
formation of obstruction so as to effectively prevent differential pressure
jamming. The contact area against the wall of the well can be cut so as to
effectively reduce the possibility of forming differential pressure
obstruction.
Spiral grooves will enable the mud to flow freely around the drill collar to
use balance pressure to prevent the formation of obstruction so as to
effectively prevent differential pressure jamming. The contact area against the
wall of the well can be cut so as to effectively reduce the possibility of
forming differential pressure obstruction.
The extensive use of spiral drill collar is based on its characteristics. This
special drill collar is able to reduce the contact area between the well wall
and the pipe so as to avoid "rock-drilling jamming"of the drill
string.
The weight of spiral drill collar is 4-6% less than that of the round drill
collar.
Spiral drill collar according to API Spec7-1 standard and SY5144
standard.