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Sperry Drilling Services

Shock Tool

Reduces Bit Bounce and Increases Rate of Penetration

and Bit Life Under the Toughest Drilling Conditions

Downhole vibration can severely limit the life of adrill bit in hard rock formations, slowing the ROP (rate of

penetration). Sperry Drilling Services shock toolincorporates the best features of all competitive shock tools,reducing weight-on-bit variation and maximizing reservoir

deliverability. By using steel disc springs and hydraulicpump open force during drilling, the tool runs partially

open, with the spring enabling the tool to extend orcompress, as required, to keep the bit on bottom.

The shock tool is run next to the bit to keep the oscillatingmass to a minimum, allowing the shock-absorbing element

to effectively absorb accelerations and keep the bit onbottom. Within normal drilling parameters, the tool is not

limited with respect to drilling weight, torque, type of

drilling fluid, flow rate, pressure drops and temperature.By increasing the life of the bit and thereby reducing thenumber of round trips, the shock tool can effectively reducenonproductive time.

Shock Tool Functional Features

Effective vibration dampening

Reduced bit bounce

Extended bit life by impact load reduction

Increased ROP

Decreased damaging cyclic stresses in BHA(bottomhole assembly) components

Shock Tool Design Features

Balanced for hydrostatic pressures

Temperature compensated using a balance piston

Sprung in both directions to handle high pumpopen forces

Free vertical movement and long life of splines throughminimum friction drive

Can be run in holes up to 400F (204C)

Seal Kit Options

The shock tool may be used with standard seals up to

250F (121C) and with optional seals up to 400F (204C).

HALLIBURTON

Bottomsub

Pistonhousing

Locknut

Balancepiston

Washpipe

Spacershims

Bellevillesprings

Retainingring

Extensionsleeve

Spline

Splitbearing

Seals

Splinemandrel

Drilling mud Spline oil

HAL14245

Reduces bit damage and BHA components by eliminating

bit bounce at any drilling depth

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Produced by Halliburton Communicationswww.halliburton.com

Sales of Halliburton products and services will

be in accord solely with the terms and conditions

contained in the contract between Halliburton and

the customer that is applicable to the sale.

H03713 06/05

2005 Halliburton

All Rights Reserved

Printed in U.S.A.

Shock Tool Technical Specifications

Tool size

Tool OD

Tool ID

Top connection, box

Bottom connection,

box with float bore pin

Length

With bottom pin

With bottom box

Weight (approximate)

Tensile load at yield

Max torsion load at yield

Pump open area

Spring rate (averaged)

Max travel

In compression

In tension

Max load in compressionor tension

6-1/2 in (165 mm)

6-1/2 in (165 mm)

2.0 in (51 mm)

NC46 (4 in IF) or

NC50 (4-1/2 in IF)

4-1/2 in REG

same as topconnection

12 ft 6-1/2 in (3.82 m)

12 ft 9-1/2 in (3.89 m)

950 lbs (430 kg)

650 lbs x 1,000

(290 daN x 1,000)

36,500 lbf

(49,500 N-m)

16.8 in2 (108 cm2)

44,000 lbf/in

(7,700 daN/cm)

3.67 in (93 cm)

2.17 in (55 cm)

70,000 lbs

(31,000 daN)

9-1/2 in (241 mm)

9-1/2 in (241 mm)

2.81 in (71 mm)

7-5/8 in REG

or 7-H90

7-5/8 in REG

same as topconnection

13 ft 4-1/4 in (4.08 m)

14 ft 1 in (4.29 m)

2,400 lbs (1,140 kg)

1,000 lbs x 1,000

(450 daN x 1,000)

96,000 lbf

(128,000 N-m)

30.7 in2 (198 cm2)

20,000 lbf/in

(3,500 daN/cm)

4.0 in (102 cm)

2.0 in (51 cm)

85,000 lbs

(38,000 daN)

8 in (203 mm)

8.12 in (206 mm)

2.50 in (63 mm)

6-5/8 in REG

6-5/8 in REG

same as topconnection

13 ft 3 in (4.04 m)

13 ft 11-1/2 in (4.25 m)

1,700 lbs (770 kg)

950 lbs x 1,000

(425 daN x 1,000)

70,000 lbf

(95,000 N-m)

23.8 in2 (154 cm2)

48,000 lbf/in

(8,400 daN/cm)

4.0 in (102 cm)

2.0 in (51 cm)

75,000 lbs

(33,000 daN)

9 in (229 mm)

9.12 in (232 mm)

2.81 in (71 mm)

7-5/8 in REG

or 7-H90

7-5/8 in REG

same as topconnection

13 ft 4-1/4 in (4.08 m)

14 ft 1 in (4.29 m)

2,150 lbs (1,018 kg)

1,000 lbs x 1,000

(450 daN x 1,000)

96,000 lbf

(128,000 N-m)

30.7 in2 (198 cm2)

20,000 lbf/in

(3,500 daN/cm)

4.0 in (102 cm)

2.0 in (51 cm)

85,000 lbs

(38,000 daN)

For more information, contact us at sperry@halliburton.com