Specifications

1.high quality ,competitive price and delivery fast
fessional technical service
3.API standard

Diameter changeable stabilizer

  

 

Stabilizer is one of main drill tool assembly in hole guiding. During drilling in deviating and horizontal well , in view of workmanship, stabilizer OD is required to be equal or 1~2mm less than drill bit so that too small clearance between borehole wall and stabilizer usually causes stabilizer to be easily stuck during tripping out of hole.

 

However, variable diameter stabilizer solves the problem which common stabilizer can not solves. During drilling in directional well, by use of differential pressure at nozzle produced by circulation of fluid among inside and outside of drill string, stabilizer stretch out supporting head to reach full hole so that stabilizer equipped with different drill tools to increase or angle drop or stabilize hole inclination. Meanwhile, when stop pump circulation, support head draws back so that stabilizer OD becomes small to improve tripping out smoothly.

 

Properties index

Type	Min. pressure when	Radial force of main support	Max. working	Max.
	support head stretch	heads under 10Mpa differential	allowed pressure	differential
	out(Mpa)	pressure (KN)	(Mpa)	pressure
ZBW8 3/4"	0.1	513	20	40
ZBW8 1/2"	0.1	513	20	40

 

Parameters

Type	Body	ID	Support head assembly OD (mm)	Support head	Overal-	Box	Pin	OD
	OD	(mm)		Nos.	Length	thread	thread	varied
	(mm)				(mm)
ZBW8 3/4"	201	55	80	15	1350	NC50	NC50	211~213
ZBW8 1/2"	204	55	80	15	1350	NC50	NC46	214~215