the Rig - Drilling Equipment
Transcript of the Rig - Drilling Equipment
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PETE 405Well Dri l l ing
Lesson 3
Th e Rig - Dr i ll ing Equ ipm en t
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Contents
Rig PumpsSolids Control Equipment
Air DrillingThe Rotary SystemThe Swivel
The Well Control SystemThe Well Monitoring SystemOffshore Drilling
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A s s ign men t s :
READ: A DE Ch. 1, to p .30
HW #1: A DE 1.1, 1.2, 1.3
NOTE: A ns w ers in bo ok are no talway s c o rrec t ...
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Schematicof Rig
CirculatingSystem for
liquid
drillingfluid
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Exam p le 1.3
Compute the pump factor in units ofbarrels per stroke for a double-actingduplex pump having:
6.5-inch liners (d L) 2.5 inch rods (d r ) 18-inch strokes (LS ) and a volumetric efficiency of 90%. (E V)
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Solu t ion :
The pump factor for a duplex pump canbe determined using Equation 1.10
stroke
d d E L F r LV S p
/in991,1
5.25.629.0182
22
3
22
22
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Recall :
There are 231 in. 3 in a U. S. gallon and42 U.S. gallons in a U.S. barrel. Thusconverting to the desired field unitsyields:
1,991 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 * /4 d L2 LS E V / (231 * 42)
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Example :
Pump Factor for Triplex Pump
3
3
2
VS
2
L
inbbl
422311
strokein0.90126
43
ELd4
3
bbl/stroke0.09442Factor Pump
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Example : Pump Rate
= Pump Factor * Strokes/min
= 0.09442
= 7.554 bbl/min
= 317.3 gal/min
min
stks
80stk
bbl
Pump Rate = 317 gal/min
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Pumps of the future
Source: drilling contractor, sept/oct 2002
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Pumps of the future
BENTECs SOFT PUMP SYSTEM (SPS)
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Hydrocyclone
desander desilter
* No moving parts* Low cost* Pressure drop* Diameter
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15Decanting Centrifuge Use?
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l
l
Use?
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Fig. 1.33 Schematic
of RotarySystem
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Fig. 1.34 Cutaway
View ofSwivel
ROTATING * Seals* Bearings
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Fig. 1.38
Cutaway View andDimensions forExample Tool Joint
PINBOX
TJShoulder
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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
1
2
3
KICK
GAIN IN PIT VOLUME EQUALTO KICK VOLUME
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Fig. 1.46 RemoteControl
Panel for
operatingBlowout
PreventersCHOKE
What to do if KICK occurs?
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23Fig. 1.44 Annular Blowout Preventer
DPTJDCOH
Press
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Ram Blowout Preventer
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25Ram Blowout Preventer -contd
SHEAR / BLIND
RAM ASSEMBLY
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26Fig. 1.48 Rotating Blowout Preventer
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Fig. 1.51 High-
PressureCirculating
System forWell
Control
Operations
Keep BHP const.
Kick
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Fig. 1.56 Subsurface
Well
MonitoringSystem
MWD
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29Fig. 1.57 Spread Mooring Systems
OFFSHORE DRILLING
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Fig. 1.58
Schematic ofEquipmentfor Marine
Drilling
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Fig. 1.59 Operation of aHeave Compensator
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Fig. 1.60 Subsea
BOPStack
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Fig. 1.63 Subsea Equipment
Installation Procedure
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Ty pic al Casin g Str ing s
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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Som e Typ ical Cas ing Str ing s
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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Example Hole and String Sizes (in)
Structural casing
Conductor string
Surface pipe
Intermediate String
Production Liner
Hole Size30 20
13 3/8
9 5/8
7
Pipe Size 36 26
17 1/2
12 1/4
8 3/4
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What is the capacity of 10,000 ft of 5OD, 19.50 lb/ft drillpipe?
Capacity = Area * Length
Area = /4 d 2 = /4 * 4.276 2 = 14.36 in 2
Length = 10,000 ft = 120,000 in
Capacity = 14.36 *120,000 in 3 /(231*42 in 3 /bbl)
Capacity = 177.6 bbls
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What is the displacement of 10,000 ftof 5 OD, 19.50 lb/ft drillpipe?
Capacity = Area * Length
Area = /4 (od 2 - id 2 ) = /4 * (5 2 - 4.276 2)
= 5.275 in 2
Length = 10,000 ft = 120,000 in
Displ. = 5.276 * 120,000 in3
/(231 * 42 in3
/bbl)
Displacement = ? bbls