Integral Stabilisers (STB)

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Integral Stabilisers (STB)
The Integral Stabiliser is designed with a 3 blade configuration, which minimises downhole torque and
reduces the damage to the borehole and enables maximum circulation via the junk slots between
the blades.
The Integral Stabiliser is designed to perform in nearly every type of formation ranging from wet sticky
formations to the hard and abrasive formations. The hard facing which is used consists of HF3000 and
HF5000 depending on the application. Diamond Impregnated inserts is also used in conjunction with
HF3000 inserts on the leading and trailing edges of the blades. By incorporating these inserts this will
enhance the longevity of the gauge in hard abrasive formations.
Applications
Benefits
Sticky to hard and abrasive formations.
Stabiliser in the size range of 8” and above will have a 15°
chamfer included into the leading and trailing edges of
the blades. This 15° chamfer of the first 2” of the crown
length of the leading and trailing edges allows for borehole
irregularities and takes into account the maximum flex that
drill collars experience in directional drilling operations. This
more effectively distributes the side loading applied to the
stabiliser hard facing during operation. Thus reducing wear and
extending the life, minimising the need to redress the stabiliser.
Features
•
•
•
•
•
Supplied in open & full wrap as per API 7-1 - addendum 3
Supplied as a near bit or string stabiliser
Supplied with a 15° lead and trail edge from 8”>
Can be supplied with a Float Valve on request
Made from either AISI 4145 MOD H or Non MAG
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Integral Stabilisers (STB)
Design Features
Standard design for sizes up to < 8”,
15° Leading edge design for sizes 8” >,
Watermelon design
Watermelon design
In the circumstance where the Stabiliser is being used in a high loading situation the Stabiliser can be manufactured as a
Watermelon design by increasing the angle of the leading edges of the crown length. These are designed and manufactured at
the client’s request.
Technical information
Standard Stabiliser sizes can be ordered as per the following table:
Stabiliser - string & near bit
Blade O.D.
range
No.
blades
Blade
width
Fish neck
min.
Crown
length
min.
Tong
space min.
Tong space
min.
(Near bit)
Minimum
OAL
(String)
Minimum
OAL
(Nearbit)
5-1/8” - 7-3/8”
3
2”
30”
12”
24”
18”
75”
63”
7-1/2” - 9-1/2”
3
2.5”
30”
16”
24”
18”
85”
9-5/8” - 12-1/4”
3
3”
30”
18”
24”
18”
96”
82”
13-3/8” - 14-5/8”
3
3.5”
30”
18”
24”
18”
100”
96”
14-3/4” - 20”
3
4”
30”
20”
24”
18”
100”
96”
>20”
3
4”
30”
20”
24”
18”
100”
96”
NOTE: Other sizes are available upon request. Above sizes may change on customer request.
www.paradigm.eu ©2013 Paradigm Drilling Services Ltd. All rights reserved.
73”
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PRODUCTS
Integral Stabilisers (STB)
Hard Facing Options
All Big Subs are Hard faced to the customer needs using the
following:
HF2000 for sizes <8”
Trapezoidal tungsten carbide inserts held in a sintered
carbide nickel bronze matrix. This will give a greater depth of
carbide coverage – ideal for high deviation drilling in abrasive
formations and also geothermal formations.
HF3000 for sizes 8”- 26”
Tungsten carbide inserts set in a powder spray deposit ideal
for abrasive formations. 97% bonding guaranteed.
Recommended for non-magnetic stabilisers.
HF2000 for sizes <8”
HF5000 for sizes 26” - 36”
This oxy-acetylene process applies tough molten carbide
particles of varying sizes held in a nickel-chrome matrix which
provides excellent bonding properties and greater surface
wear characteristics are achieved. Surface hardness levels over
40 H.R.C. Ideal for GEOTHERMAL applications over 350°c.
HF6000 - Diamond Insert Techology
The Diamond Impregnated material which Paradigm supplies
are single sourced from the leading European manufacturer.
Other lower cost inserts have been empirically proved to have
low diamond content, high levels of graphitisation from poor
heat control in manufacture and overall much lower resistance
to wear than the Paradigm inserts.
HF3000 for sizes 8”- 26”
Paradigm’s supplier is using premium quality diamond,
meaning crystalline material (cubo-octahedral shape) with
low level of impurities leading to high thermal stability
characterised by high friability resistance.
The manufacturers of the Paradigm inserts use 25 % by
volume of diamond concentration based on long term
experience in this field.
HF5000 for sizes 26” - 36”
The diamonds are individually pelletised; therefore they are
evenly distributed in the insert, meaning the wear is shared
equally stone by stone ensuring even wear.
The manufacturing process of the inserts is under a
controlled atmosphere with the inserts sealed in molten
glass then compressed in the autoclave using argon gas as
the compressive medium. The glass preventing the Argon
from permeating the inserts ensuring maximum density and
consistency.
HF6000 - Diamond Insert Techology
www.paradigm.eu ©2013 Paradigm Drilling Services Ltd. All rights reserved.
Integral Stabilisers (STB)
The inserts are manufactured at a temperature below the
critical point for diamond combustion in order to keep
the diamond close to virgin state. Synthetic diamond is a
metastable product which reverts back to graphite state with
increasing temperature and in the presence of Oxygen or
catalyst agents such as Fe, Co or Ni.
The sintering process is made by using an iso-static press
reaching a fully compacted condition (zero porosity) material
without any permanent stress, due to the three dimensional
shrinkage methods. This means maximum retention of the
diamonds in the insert when exposed to abrasive conditions
in the field.
Last but not least the Paradigm inserts use a hard binder
matrix, based mainly on tungsten carbide, which maintains a
final hardness level 85 HRA as a minimum.
N.B. The tools shown here are patented or have patent pending
www.paradigm.eu ©2013 Paradigm Drilling Services Ltd. All rights reserved.
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