5 4 overview RSS feb 2000

1 ASL 5536 Rotary Steerable Systems... 4 ASL 5536 What is PowerDrive?. • 3-D, fully steerable tool that makes changes to inclination and azimuth with continuous drillstring rotation •

1 ASL

5536

Rotary Steerable Systems

2 ASL

5536

Downhole Sliding Problems

 Maintaining orientation

 Low effective ROP

 Poor hole cleaning

 Inability to slide

 Differential sticking

 Buckling and lock up

 High tortuosity

 Build-up rate formation sensitive

3 ASL

5536

PowerDriv e

4 ASL

5536

What is PowerDrive?

• 3-D, fully steerable tool that

makes changes to inclination and azimuth with continuous

drillstring rotation

• No “sliding mode”

5 ASL

5536

PowerDrive Principle of

Operation

 Side force or push the bit tool

 Pads extend dynamically from a rotating housing

 Curvature defined by 3 points of contact

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5536

PowerDrive - Job History to 03/00

• Total wells = 55

• Total runs = 201

• Total circulating hours = 9,825

• Total footage = 243,068 ft

• Depth range = 1,283 to 34,967 ft

• Maximum DLS = 11°/100 ft

• Inclination range = 4 to 125°

• Longest run = 5,255 ft

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5536

PowerDrive Operations

Case Histories

8 ASL

5536

Meeting the 10Km Challenge

9 ASL

5536

PowerDrive - Wytch Farm M-11,

UK • World record extended

reach well

• Measured depth at TD

= 34,967 ft

• Horizontal displacement

at TD = 33,156 ft

• Planned to drill 5,548 ft in

49 days

• Drilled 7,681 ft of horizontal hole in 44 days

• 113 ft per day planned,

175 ft per day achieved

by PowerDrive BHA

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5536

Conclusions

• PowerDrive’s impact on drilling operations have

– Increased departures and minimized risks in ERD wells

– Reduced lost in hole incidents

– Allowed tough designer wells to be drilled safely

– Improved overall drilling efficiency and subsequently lead to reduced drilling costs

• The PowerDrive675 system has proven itself in numerous drilling applications as a reliable replacement for

conventional tools

• PowerDrive900 system for 121/4-in hole size is currently in field test

11 ASL

5536

AIM- At Bit Inclination

12 ASL

5536

AIM - At Bit Inclination

Measurement

 Integral to Standard Power Pak Motors

 Continuous Single-Axis Inclination ~1ft from Bit vs 40 ft for MWD

 Telemetry to 60ft behind Bit

 Rotating Near-Bit Stabilizer

 20,000psi, 150 °C Rating

 200+hr Battery Life