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LARGE DIAMETER DRILLPIPE FIELD TRAINING OUTLINE Changes in Drill - - PowerPoint PPT Presentation
LARGE DIAMETER DRILLPIPE FIELD TRAINING OUTLINE Changes in Drill - - PowerPoint PPT Presentation
LARGE DIAMETER DRILLPIPE FIELD TRAINING OUTLINE Changes in Drill Pipe over a decade Introduction to Large Diameter Drill Pipe Mid Body Tube Specifications Mid Body Tube Classifications Single Shoulder Rotary Connections Double
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INTRODUCTION TO LARGE DIAMETER DRILL PIPE
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Large diameter drill pipe vary in sizes from 3-1/2 OD to 6-5/8 OD with the tool joints varying from 5 OD to 8-1/2 OD, respectively.
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Typically large diameter drill pipe is manufactured in 31.5 lengths which is referred to Range 2 per API Specifications 5D.
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All oilfield and HDD drill pipe is manufactured to API Specifications for example Spec 7-1 & 7-2, Spec 5D, and RP7G.
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MID BODY TUBE SPECIFICATIONS
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The pipe mid body tube is upset and heat treated to meet the customer specifications.
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Drill pipe can either be Upset with and Internal Upset (IU), External Upset (EU), or Internal External Upset (IEU).
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Depending on the pipe grade the upset type shall be specified to meet the welding parameters needed to give the product the most strength.
LONG MIU AREA
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MID BODY TUBE SPECIFICATIONS (Cont.)
HDD ROTARY SALES, LLC 2009
PIPE GRADE E-75 X-95 G-105 S-135 S-135 MOD. YIELD STRENGTH (PSI) MIN 75,000 95,000 105,000 135,000 135,000 MAX 105,000 125,000 135,000 165,000 165,000 TENSILE STRENGTH (PSI) MIN 100,000 105,000 115,000 145,000 145,000 CHARPY IMPACTS (FT. LBS.) MIN 45 59 ROCKWELL C SCALE MAX 34 38
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Drill pipe grades are E-75, X-95, G-105, S-135 and S-135 Mod.
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The pipe mid body tube is heat treated after upsetting, to provide the mechanical properties needed to meet specified specs.
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For the HDD market Grade S-135 is predominately used for all drill pipe.
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HDD ROTARY SALES, LLC 2009
MID BODY TUBE SPECIFICATIONS (Cont.)
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Drill pipe varies not only in size but also in weight.
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Same size OD can have different weights.
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When ordering specify by nominal weight, BUT when shipping ask the manufacture to specify the Adjusted Weight.
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The Adjusted Weight will vary on Tool Joint Connection geometry.
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§ Drill pipe Classification types:
§ NEW (Un-used drill pipe) § PREMIUM § DS1 CAT 5 DS1 CAT3 Tube OD wear is inspected to 80% Remaining Body Wall (RBW) Tool Joint OD wear acceptance criteria will vary on each connection. § CLASS 2 Tube OD wear is inspected to 70% Remaining Body Wall (RBW) Tool Joint OD wear acceptance criteria will vary on each connection. § CLASS 3 § Any imperfections or damages exceeding Class 2 inspections
MID BODY TUBE CLASSIFICATION
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IDENTIFICATION MARKINGS
§ Drill Pipe is visually identified by machined grooves and markings on the Pin Tool Joint OD. § Can be ordered with No Marks at all § The new ISO markings are being used to identify drill pipe grade, and weight. § Pipe Weight Codes and Pipe Grade Codes are stamped on the flat. § Old API markings can be used and these consists of only machined grooves. § No Grooves = Grade E-75 § 1 Groove = Grade X-95 § 2 Grooves = Grade G-105 § 3 Grooves = Grade S-135
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TOOL JOINTS
§ Tool Joints consist of a Pin (Male) and Box (Female) Rotary Shoulder Connection. § Tool Joints are typically made from AISI 4137M Steel Forgings, but can be made from AISI 4140/4145 heat treated bar stock material. § Tool Joints are manufactured to API Spec 7-1 specifications. § Maintain a Minimum Specified Material Yield Strength (SMYS) of 120,000 psi. § Two types of Rotary Shoulder Connections: § Single Shoulder § Double Shoulder
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SINGLE SHOULDER ROTARY CONNECTION
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Only has a Primary (External) Shoulder
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Low torsional capabilities
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Larger OD
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Smaller ID
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Examples of Single Shoulder Connections are: NC (IF), Full Hole (FH), and Regular (Reg) Connections
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DOUBLE SHOULDER ROTARY CONNECTION
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Has two shoulders, a Primary (External) Shoulder and a Secondary (Internal) Shoulder
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High torsional capabilities
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Smaller OD
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Larger ID
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Examples of Double Shoulder Connections are: NC-38 DS, 6-5/8 FH DS, and 5-1/2 FH DS
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MAKE-UP TORQUE REQUIREMENT DETERMINATION
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Make-up Torque is defined as the torque needed to maintain the make-up shoulder(s) in contact to prevent any downhole make- up or shoulder separation from tensile and/or bending loads. Sometimes referred to as a pre-load.
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60% of the Material Yield Strength has been determined to be sufficient in most connections but can vary.
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Make-up Torque Formula based on 60% of the Specified Material Yield Strength.
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q p cos 2 12 ) 60 . (
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HDD ROTARY SALES, LLC 2009
TORSIONAL AND MAKE-UP TORQUE CAPABILITIES
§ Torsional and tensile capabilities between Single
Shoulder and Double Shoulders.
Connection Type OD ID Torsional Yield Strength Tensile Yield Strength Make Up Torque NC38 5" 2-7/16" 22,200 708,100 11,700 DS38 5" 2-7/16" 29200 708,100 17,500 NC50 6-5/8" 2-3/4" 63,400 1,551,700 32,900 DS50 6-5/8" 2-3/4" 90,600 1,552,000 54,400 5-1/2 FH 7-1/4" 3-1/2" 72,500 1,619,200 37,400 5-1/2 FHDS 7-1/4" 3-1/2" 102,100 ,1619,200 61,300 6-5/8 FH 8-1/2" 4-1/4" 109,200 2,133,900 56,100 6-5/8 FHDS 8-1/2" 4-1/4" 157,700 2,133,900 95,800
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TOOL JOINT CARE AND HANDLING
- CLEANING AND INSPECTION
- MAKE UP
- BREAK-OUT TORQUE (UNDERSTANDING)
- VISUAL – SHOULDER DAMAGE
THREAD PROFILES
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