• NS-1™ & NS-2™ for when you need equipment manufactured and inspected to a higher standard

  • Reducing Non-productive Time - Increasing Performance

  • Manufacturing and Inspection Standards to reduce the risk of equipment failures whilst drilling

  • NS-1™ and NS-2™ Designed to supplement the API standards when conditions warrant it

NS-3 Contents

NOMENCLATURE

SECTION 1. DRILL STRING DESIGN

1.1 DESIGN ASSUMPTIONS

1.2 CALCULATION DESIGN PARAMETERS, FACTORS & FEATURES

    Design Parameters, Design Factors, Design Features

1.3 DESIGN PROCEDURES

    Plan Well, BHA Design, Select Drill Collar & BHA Component Diameters, Selecting BHA Connections and Features, BHA Connection Thread Form, Stress Relief Features, Stress Relief Features, Cold Rolling, Length of Drill Collar Section, Stabiliser & Jar Placement, Tool Joint Torsional Capacity, Calculate Stiffness Ratio, Drill Pipe String Design, Tension Design Nomenclature, Calculate Allowable Load, Set Margin Of Overpull (MOP), Calculate Maximum Working Load, Calculate Maximum Length Of The First Drill Pipe Section, Calculate Maximum Length Of The Second Drill Pipe Section, Burst Pressure, Collapse Pressure, Combined Loading, Derating Collapse Pressure for Simultaneous Tension, Derate Drill Pipe Load Capacity for Simultaneous Tension & Torsion, Stability Forces and Drill Pipe Buckling, Slip Crushing, Buoyancy Factor for Non-Steel Components, Dope Friction Factor, Torque Turns calculations, Combined String Max Torque whilst drilling, Combined String Max Pull

SECTION 2. DIMENSIONS & WEIGHTS

2.1 NOMINAL DRILL PIPE TUBE DIMENSIONS

2.2 DRILL PIPE “STANDARD” TOOL JOINTS & TUBE

2.3 HWDP DIMENSIONS & WEIGHTS

SECTION 3. LOAD CAPACITIES

3.1 DRILL PIPE TENSILE CAPACITY

3.2 DRILL PIPE TORSIONAL CAPACITY

3.3 DRILL PIPE BURST PRESSURE CAPACITY

3.4 DRILL PIPE COLLAPSE PRESSURE CAPACITY

SECTION 4. COMBINED LOADING

4.1 DRILL PIPE TUBES

Tube Combined Loading Theory, Using the Tube Combined Loading Plots

4.2 DRILL PIPE TOOL JOINTS

Tool Joint Combined Loading Theory, Using the Combined Loading Plots

SECTION 5: MAKE UP TORQUE (MUT)

5.1 ROTARY SHOULDERED CONNECTION MUT

SECTION 6. DRILL PIPE BUCKLING

6.1 DRILL PIPE BUCKLING IN NON-CURVING INCLINED AND HORIZONTAL WELLBORES

6.2 DRILL PIPE BUCKLING IN CURVING WELLBORES

SECTION 7. BENDING STRENGTH RATIO

7.1 BSR OF STANDARD BOTTOM HOLE ASSEMBLY CONNECTIONS

7.2 BSR OF BOTTOM HOLE ASSEMBLY CONNECTIONS WITH STRESS RELIEF FEATURES

SECTION 8. MISCELLANEOUS TABLES

SECTION 9. APPENDIX

Glossary of Terms