PETE 411 Well Drilling

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PETE 411 Well Drilling

• Lesson 3 The Rig - Drilling Equipment

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Contents

• Rig Pumps
• Solids Control Equipment
• Air Drilling
• The Rotary System
• The Swivel
• The Well Control System
• The Well Monitoring System
• Offshore Drilling

3
Assignments

• READ ADE Ch. 1, to p.30
• HW 1 ADE 1.1, 1.2, 1.3
• Due Monday, Sept. 9, 2002
• at the beginning of class
• NOTE Answers in book are not always
  correct...

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Schematic of Rig Circulating System for liquid
drilling fluid
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(No Transcript)
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Example 1.3

• Compute the pump factor in units of barrels per
  stroke for a double-acting duplex pump having
• 6.5-inch liners (dL)
• 2.5 inch rods (dr)
• 18-inch strokes (LS)
• and a volumetric efficiency of 90. (EV)

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Solution

• The pump factor for a duplex pump can be
  determined using Equation 1.10

8
Recall

• There are 231 in.3 in an U. S. gallon and 42
  U.S. gallons in a U.S. barrel. Thus converting to
  the desired field units yields
• 1991 in.3/stroke gal/231 in.3 bbl/42 gal.
• 0.2052 bbl/stroke.
• Thus Pump Factor 0.2052 bbl/stroke

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Pump Factor 3 p/4 dL2 LS EV/(231 42)
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Example Pump Factor for Triplex Pump
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Example Pump Rate

• Pump Factor Strokes/min
• 0.09442
• 7.554 bbl/min
• 317.3 gal/min

Pump Rate 317 gal/min
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• Hydrocyclone
• desander
• desilter

No moving parts Low cost
Pressure drop Diameter
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Decanting Centrifuge
Use?
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Use?
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Fig. 1.33 Schematic of Rotary System
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Fig. 1.34 Cutaway View of Swivel
Seals Bearings
ROTATING
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PIN BOX TJ Shoulder
Fig. 1.38 Cutaway View and Dimensions for
Example Tool Joint
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Fig. 1.39 Stabilizer
Keeps pipe in center of hole Aids in drilling
straight hole Prolongs bit life
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Fig. 1.41 Kick Detection During Drilling
Operations
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GAIN IN PIT VOLUME EQUAL TO KICK VOLUME
2
KICK
1
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Fig. 1.46 Remote Control Panel for operating
Blowout Preventers
CHOKE
What to do if KICK occurs?
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DP TJ DC OH Press
Fig. 1.44 Annular Blowout Preventer
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Ram Blowout Preventer
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SHEAR / BLIND RAM ASSEMBLY
Ram Blowout Preventer - contd
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Fig. 1.48 Rotating Blowout Preventer
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Fig. 1.51 High-Pressure Circulating System for
Well Control Operations
Kick
Keep BHP const.
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Fig. 1.56 Subsurface Well Monitoring System
MWD
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OFFSHORE DRILLING
Fig. 1.57 Spread Mooring Systems
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Fig. 1.58 Schematic of Equipment for Marine
Drilling
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Fig. 1.59 Operation of a Heave Compensator
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Fig. 1.60 Subsea BOP Stack
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Fig. 1.63 Subsea Equipment Installation
Procedure
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Typical Casing Strings
Water Level Depth Seafloor Below
ML Conductor pile 36 30
200 Conductor Casing 26 20
1000 Surface Casing 17 1/2 13 3/8
4000 Hole Csg.
Depth
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Some Typical Casing Strings
Depth Below ML Conductor
pile 36 30 200 Conductor Casing
26 20 1000 Surface Casing 17 1/2 13
3/8 4000 Hole
Csg. Depth
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Capacity Area Length
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What is the capacity of 10,000 ft of 5 OD, 19.50
lb/ft drillpipe?
Capacity Area Length Area p/4 d2 p/4
4.2762 14.36 in2 Length 10,000 ft
120,000 in Capacity 14.36 120,000 in3
/(23142 in3 /bbl) Capacity 177.6
bbls
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What is the displacement of 10,000 ft of 5 OD,
19.50 lb/ft drillpipe?
Capacity Area Length Area p /4 (od2 -
id2 ) p /4 (52 - 4.2762) 5.275
in2 Length 10,000 ft 120,000 in Displ.
5.276 120,000 in3 /(231 42 in3 /bbl)
Displacement ? Bbls