shock tool _ downhole drilling tools

3/8/2015 ShockTool|DownholeDrillingTools

http://challengerdownhole.com/downholetoolproducts/shocktool/ 1/4

Calgary 403.235.2364Edmonton 780.435.5455

Description:The Challenger Downhole Tools Shock Tool effectively reduces impact loading on the bit to extend bit life andreduce bit trips. By isolating axial bit vibrations from the drill string, the shock tool will reduce lateral and torsionaldrill string vibrations, and related fatigue damage or failure of the rotary connections.

The shock tool allows optimum bit speed to be used under rough drilling conditions, increasing the rate ofpenetration. The Challenger shock spring rate can be adjusted for additional applications such as, P.D.C. bits andused with vibration tools and MWD.

The Challenger PDC Shock Tool

This design of our Shock Tool is built with PDC bits in mind. The PDC style bit requires far less weight while drilling,the Challenger PDC style Shock is built to operate and perform better with these lower WOB.

The typical shock is used and designed to operate with Roller Cone style bits that require significantly higher WOBthan a PDC, we designed a shock to run with a PDC application which allows the shock to operate better at the lowerWOB utilizing its entire stroke more effectively.

When ordering shocks WOB and application information should be considered to assure maximum performancefrom the Shock Tool.

Challenger Shock Tool (Belleville Spring Design)

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Reduces drill string vibration and impact from MWD

systems

Adjustable spring rate for P.D.C. applications

Can be provided in both near bit and string

applications

Does not use temperature-sensitive elastomers for

shock absorption, therefore is suitable for use in

temperatures to 275F (135C), with optional seals

available for temperatures up to 450F (230C)

Reliable Belleville disc springs provide optimum

load/deflection characteristics to maintain consistent

contact between bit and formation, effectively

reducing impact loading to extend bit life

Low friction torsional drive permits free vertical

movement

Reduces wear and tear on rig and equipment, and

fatigue failures on drill collars and drill pipe

Automatically compensates for pump open force

Isolates bit induced vibrations from the drill string

Pressure balanced to eliminate the effect of downhole

hydrostatic pressure

If ran with MWD tool, position shock as close to MWD

equipment as possible

With a packed bottom hole assembly, the shock tool

may be located a minimum of two drill collar lengths

above the top stabilizer, however bit protection will

be reduced due to the greater un- sprung mass below

the tool.

For maximum effectiveness, the shock tool should be

positioned immediately above the bit.

Automatic compensation of pump open effect makes

the shock tool effective with any combination of bit

weight or circulating pressure.

Benefits & Features

Operation

Imperial



Nominal OD(inch

Length (ft) InsideDiam

Approx. Weight(lbs)

Pump Open Area(in2)

Torsional Limit (ft lbs) Tensile Yeild (lbs)

3.50 7.8 1.00 230 5.9 10,000 239,000

4.75 10.7 1.50 540 11.0 20,000 561,500

6.25 11.7 2.25 1000 19.6 37,900 926,600

6.50 11.6 2.25 1030 19.6 39,500 960,000

6.75 11.5 2.75 1100 21.6 46,400 837,400

8.00 11.9 2.75 1690 30.6 104,600 1,378,800

9.00 12.3 3.00 2220 38.5 125,000 1,502,000

11.00 12.0 3.00 3240 63.6 225,600 1,628,300

12.00 12.0 3.00 3900 63.3 345,400 1,628,300

Metric

Nominal OD(inch

Length (m) InsideDiam

Approx. Weight(kg)

Pump Open Area(mm2)

Torsional Limit (N-m) Tensile Yeild (daN

89 2.4 25 100 3 800 14 000 106,300



121 3.3 38 250 7 000 28 000 249 800

159 3.6 57 450 12 700 53 000 412 200

165 3.5 57 470 12 700 55 000 427 000

171 3.5 70 500 13 900 64 000 372 500

203 3.6 70 770 19 700 145 000 613 300

229 3.7 76 1010 24 800 174 000 668 100

279 3.7 76 1470 41 000 313 000 724 300

305 3.7 76 1770 41 000 480 000 724 300

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shock tool _ downhole drilling tools

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