Drill Collar Performance Characteristics Drill Collar Size: 2.500" X 1.375"

Workstrings International® 2011 Version 1.0 Type: Slick

Connection: 2.500 X 1.375 MW20

Pipe

OD (in) Cross Sectional Area of Pipe Body (in2)

Wall Thickness (in) Cross Sectional Area of OD (in2)

ID (in) Cross Sectional Area of ID (in2)

Calculated Plain End Weight (lbs/ft) Section Modulus (in3)

Polar Section Modulus (in3)

Drill Collar Body Moment of Inertia (in4)

Drill Collar Body Polar Moment of Inertia (in4)

OD (in)

ID (in)

Adjusted Weight (lbs/ft)

Approximate Length (ft)

Torsional Strength (ft-lbs) Fluid Displacement (gal/ft)

Recommended Make-up Torque (ft-lbs) Fluid Capacity (gal/ft)

Minimum Make-up Torque (ft-lbs) Fluid Capacity (bls/ft)

Tensile Strength @ Recommended MUT (lbs) Drift Size (in)

BSR

Note: Minimum make-up is based on shoulder separation caused by bending

4,200

2,400

0.18

Tool Joint Drill Collar Assembly with Grant Prideco

MW20 Connection

0.08

MW20

2,100

154,000

1.298

1.25

2.500

1.375

11.64

31.50

1.394

2.787

1.375

11.640

1.74

0.0018

3.48

1.485

New

(Nominal)

3.424

4.909

(Nominal)

New

2.500

0.563