IDEAS E-Learning Course · 2016-09-16 · • Preventing BHA / Drillstring Twist-offs, Washouts, Parted Strings In Section 11 we spend considerable time looking at Directional Drilling

IDEAS E-Learning Course

Independent Dr i l l ing Engineer ing Associates (S) Pte Ltdwww.wel l ideas .com | info@wel l ideas .com

Drill Bits & Drillstring


Welcome to IDEASE-Learning Courses

There are many advantages to E-Learning! Key features amongthem are:-

• You can study in your own time and at your own pace

• You can repeat sections time and again until you understand thingsclearly

• There are no travel or hotel costs involved

Interaction with the tutor is still possible, just as it is in physical classroom,through individual calls via Skype or e-mail / social media sites.

Course 2: Drill Bits & Drillstring



Course Objective

Who Should Do The Course

The objective of this course is to help people to understand the major components of the Drill-

string starting with the whole range of drill bits available for the drilling of different types of rock

through to the BHA (Bottom Hole Assembly) which includes stabilisers, NMDC’s (Non-Magnetic

Drill Collars), MWD (Measurement While Drilling) tools, LWD (Logging While Drilling) tools, PDM’s

(Mud Motors), Rotary Steerable Systems, Turbines, Drill Collars, Jars, HWDP and Drill Pipe.

It cross-references the IADC Drilling Manual, API Standards & Recommended Practices, NACE, the

Drilling Data Handbook, and Manufacturer’s Information & General Industry Data. It also gives

delegates further sources of information to pursue should they have a particular, more detailed

interest.

The course has been written for several groups of personnel, for example:-

• Operator personnel who are commencing a career offshore as Offshore Drilling Engineer or

Trainee Drilling Supervisor;

• Drilling Contractor personnel who are on “fast-track” accelerated learning programs from young

graduate or pump-man through to Assistant Driller; Drillers; Toolpushers or Performance

Toolpushers who are involved with “Turn-key” or “Performance” contracts;

• Service personnel who wish to broaden their knowledge and understanding of Drilling Systems;

• Delegates who are in another industry or full-time education who envisage joining the Drilling

Industry.


Section 1: Drilling Bit Types &Selection

Section 2: Roller Cone / Rock Bits

Section 4: Specialist Bits

Section 5: Bit Nozzle Sizing & Hydraulics

Section 6: Drillstring Design

Section 3: Fixed Cutter Bits


In Section 1 we look at, in a general sense, thetypes of drill bits available and their selection.Specifically we cover:-

• The History & Background Behind Drill Bits• Bit types & Classification (Roller Cone / RockBits; Fixed Cutter Bits)• Key Drivers Behind Bit Selection (Geology,Rock Compressive Strength, Cost per Foot,Vibration, Drift, Overall Performance)• Potential Problem Mitigation (Destructive /Premature Wear etc.)

In Section 2 we look at Roller Cone / Rock Bitsin detail, specifically:-

• Type 1: Mill Tooth Cutter Bits:- Cutters, Cones,Gauge, Bearings, Nozzles, Classification,Potential Problems, Dull Bit Grading

• Type 2: Tungsten Carbide Insert Cutter Bits:-Cutters, Cones, Gauge, Bearings, Nozzles,Classification, Potential Problems, Dull BitGrading

In Section 5 we simplify the rather complex subject area of BitNozzle Sizing & Hydraulics. We look at the following areas:-

• Bit Hydraulics Optimisation• Specialist Hydraulics Presentations• Determining Flow Rate• Hole Cleaning Charts• Determining TFA – Total Flow Area• Determining Nozzle Size• Jet Impact Force Model – And When to Use It• Hydraulic Horsepower – And When to Use It• Mud Rheology Effects

In Section 6 we look at why Drillstrings are designed as they are.This is often a difficult area to understand in its entirety and sothe section has been broken down into its constituentcomponents so that the subject can be readily understood. Welook at the following areas:-

• Basic Components Listing• Buoyancy & Neutral Point• String Weight• Number of DC’s (Drill Collars) and HWDP (Heavy Weight DrillPipe) required to give sufficient WOB (Weight to the Bit)• Margin of Overpull• Maximum Drill Pipe Length Before Tensile Failure Occurs• Maximum Make-Up Connection Torque• Bending Strength Ratio• Bit Walk / Stabilisation / NMDC’s (Non Magnetic Drill Collars)• Jar Placement

• In Section 4 we look at Specialist / Specialised Bits, specificallyfor the following areas:-

• Side-track• Hard Rock• Coring• Anti-Whirl Coring• Drill-Core• Whipstock• Jetting• Turbine• Eccentric• Running Casing Whilst Drilling• Casing Shoe Drill-Out

In Section 3 we look at Fixed Cutter Bits indetail, specifically:-

• Type 1: PDC & TSD Cutter Bits:- Cutters,Blades, Junk Slot Area, Flow-by Area, Nozzles,Performance, Potential Problems, Dull BitGrading

• Type 2: Natural Diamond Bits:- Diamonds,Blades, Gauge, Flow-by Area, Performance,Potential Problems, Turbine Usage, Cost

• Type 3: Impregnated Bits:- Cutters, Blades,gauge, Flow-by Area, Performance, PotentialProblems, Turbine Usage, Cost


Section 7: DrillstringStandards

Section 10: Drillstring Dynamics

Section 11: Directional BHA Design

Section 9: Drill Pipe Body &Connections

Section 8: Drillstring Care &Inspection


In Section 7 we look at the standardsDrillstring steels are manufactured to andthe standards to which Drillstringcomponents should be maintained:-

• Properties of OCTG (Oilfield CountryTubular Goods)• Drillpipe Terminology• Stress – Buckling, Tension & Torsion• Damage• Stress Relief – Stress Relief Groove, Bore-Back Box• Corrosion• Poor Practices Offshore• Preventing BHA / Drillstring Twist-offs,Washouts, Parted Strings

In Section 11 we spend considerable time looking atDirectional Drilling Assemblies – both their design andhow they are utilized.

• Background Development• Example Well Designs (Which Drive the BHA’s Design)• Deflection Techniques• Whipstock, Rotary BHA’s, Motors, Turbines• Geo-Steering• Horizontal Drilling• Rotary Steerable BHA’s• Assemblies for Multilateral Drilling

In Section 9 we look at the following:-

• API Drill Pipe• Double Shouldered Connections• Landing String• Intelli-pipe

In Section 10 we look at how severe DrillstringDynamics can cause Drillstring Failure – and what canbe done to avoid failure:-

• Preventing Failures• Shock & Vibration• Axial, Lateral, Torsional, BHA Whirl, Stick-Slip &Eccentric• Mitigating Shock & Vibration• Shocks Whilst Drilling, Reaming, Pick-up Off BottomPrior to Making a Connection

In Section 8 we look at API Standards &Specs as well as IADC Standards:-

• API Standards for Pipe Inspections• API 5DP; API Spec 7-1; API Spec 7-2• Care & Handling of Tubulars• Safety First When Handling Tubulars• Preparing to – and Picking-up – the BHA• IADC Standards• Reference to the IADC Manual


Through applying creative thought, ingenuity, experience, integrative life-cycle considerations,fully focused dedication and commitment to problem-solving, IDEAS aim to provide the mostprofessional, solution-oriented, cost-effective drilling engineering and related servicesanywhere around the world at any time.

Independently. Quickly.

Objectively.

IDEAS (Independent Drilling Engineering AssociateS) is a thinking company. It focuses its in-depth and holistic knowledge, breadth of experience and expertise onto operators, drillingcontractors and service companies’ drilling engineering and related work requirements, toprovide top quality fast turnaround bespoke work packages on either an ad-hoc or long termbasis, 24 hrs per day / 365 days per year, worldwide.

IDEAS

Independent Drilling Engineering Associates

Documents

IDEAS E-Learning Course · 2016-09-16 · • Preventing BHA / Drillstring Twist-offs, Washouts, Parted Strings In Section 11 we spend considerable time looking at Directional Drilling