This Development well is the first in Malaysia to utilize the new generation of drilling risk mitigation tools from OMNI

OMNI Versatile Drilling Reamer (VDR) was installed at top of BHA replacing the conventional fixed blade stabilizer. Carefully selected drilling parameters and revised drilling practices resulted in drilling this highly deviated well efficiently and with reduced drilling risk. Drill pipe was pulled to surface on elevators and casing was run smoothly according to plan. Best Practice summary: Mechanical Risk Mitigation:

• OMNI VDR with top PDC cutters

• Back reaming 1x before every connection while drilling

• Back reaming 2x before every connection at sections with high torque while drilling

• OMNI VDR placed at top of BHA in case of mechanical obstruction while pulling out of hole

Hole Cleaning:

• OMNI VDR with TCI on blades and low side utilized

• 5” Hydroclean drill pipe utilized

• Circulation maintained at 1000GPM

• Circulation 5~7 times bottom ups before POOH

• RPM maintained at 180 Mud System:

• SBM at 10.2 ppg for the entire section

Best Practice Bulletin

New Technology for Improved Hole Condition

OMNI VDR in Development Wells

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OMNI VDR Versatile Drilling

Reamer

5” HWDP

Accelerator

5” HWDP

Jar

5” HWDP

Crossover

12” OMNI VDR

8” NMDC

MWD

Inline Flex Collar

Short Hop Receiver

Power Drive RSS PD900

12 ¼” RSS PDC Bit

Top PDC cutter

TCI on Blade & low side

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9 5/8" Casing - P/up & Slack off Weight Vs Joint Number

0

50

100

150

200

250

136

130

124

118

112

106

100

94

88

82

76

70

64

58

52

46

40

34

28

22

Joint Number

P/up &

Slack off W

eight (klbs)

P/up S/O

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Perfect hole condition was achieved with torque and drag within acceptable limits String was pulled out of hole on elevators smoothly Casing was run efficiently according to plan

OMNI VDR equipped with Tungsten Carbide Inserts (TCI) on blade OD has contributed to improved hole condition while drilling and tripping OMNI VDR equipped with PDC cutters and placed near the top of BHA to facilitate back reaming while drilling. This offered a valuable risk mitigation tool for clearing obstructions while pulling out of hole

Dec-07

12 1/4" Off-Bottom Torque

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0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Off-Bottom Torque (k ft/lbs)

Depth (ft)

FF 0.10 FF 0.20 FF 0.30 FF 0.40

FF 0.50 OBT Break-Over Torque

12 1/4" Drilling Hook-Loads

2200

2300

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70 80 90 100 110 120 130 140 150 160 170 180 190 200 210

Hook-Load (k/lbs)

Depth (ft)

S/O 0.10 S/O 0.20 S/O 0.30 S/O 0.40 S/O 0.50

ROB Weight P/U 0.10 P/U 0.20 P/U 0.30 P/U 0.40

P/U 0.50 S/O Wt. P/U Wt. ROT Wt.

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