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Variable Diameter Stabilizer

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product description

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.

 

Parameters

 

Type

Body
OD
(mm)

ID
(mm)

Support head assembly OD (mm)

Support head
Nos.

Overal-
Length
(mm)

Box
thread

Pin
thread

OD
varied

ZBW8 3/4"

201

55

80

15

1350

NC50

NC50

211~213

ZBW8 1/2"

204

55

80

15

1350

NC50

NC46

214~215

 

Properties index

 

Type

Min. pressure when
support head stretch
out(Mpa)

Radial force of main support
heads under 10Mpa differential
pressure (KN)

Max. working 
allowed pressure
(Mpa)  

Max.
differential 
pressure

ZBW8 3/4"

0.1

513

20

40

ZBW8 1/2"

0.1

513

20

40

 

Corresponding parameter set not found, please add it in property template of background
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暂未实现,敬请期待
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