Download - Drilling Bits Salam
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CASING
Drilling Bits
Ginoil Petroleum EngTexto escrito a mquinaKayfa Haluk -
Introduction
Drilling bits selection is crucial to the performance of all drilling projects.
Understanding the different types of bits and their respective applications is a pre-requisite to bit selection.
Not only the right bit in the right application but also running it with the right operating parameters.the right operating parameters.
Well engineers must stay abreast of the latest developments to ensure optimum bit selection.
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Bit TypesBit Types
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Bit Types
Drill Bits
FixedCutter
RollerCone
InsertMill ToothDiamondP D C
NaturalDiamond
ImpregnatedDiamondT S P
RollerBearing
JournalBearing
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PDC (Polycrystalline Diamond Compact)
Drill Bits
FixedCutter
RollerCone
Use artificially made diamonds
Run successfully with downhole motors
InsertMill ToothDiamondP D C
NaturalDiamond
ImpregnatedDiamondT S P
RollerBearing
JournalBearing
Courtesy of
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PDC bit: Elements
1. synthetic diamond cutters
2. support structures for the cutters
3. gauge protection
1
3
2
5
2
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3. gauge protection inserts
4. Depth of cut limiters
5. nozzles.
Steel / Tungsten Carbide
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PDC bit: Body Material
Steel body in one piece
High precision simple repair no weld
Tungsten Carbide matrix on steel shell
Erosion resistant
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8 mm11 mm13 mm16 mm
19 mm
PDC bit: Cutting Elements
BLADE
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PDC CUTTER
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Natural Diamond
Drill Bits
FixedCutter
RollerCone
InsertMill ToothDiamondP D C
NaturalDiamond
ImpregnatedDiamondT S P
RollerBearing
JournalBearing
Courtesy of
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Diamond Bit Profiles
Shallow coneParabolicTaper or Double cone
Soft formation=> => => => => Hard formation(More diamond coverage)
Low ROP
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Diamond bit : Design
Size and spacing of diamonds determines its use Widely spaced diamonds : large pieces of soft sand and shale Medium spacing of large diamonds: wide range of sand, shale ,
limestone Smaller diamonds set in close pattern: hard formations Smaller diamonds set in close pattern: hard formations
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Natural Diamond bit: Elements
Natural Diamonds = hardest mineral
But brittle and Temp dependant
Fluid circulation important
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No cone , operates like a single unit
Sensitive to shock and variation
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TSP (Thermally Stable Polycrystalline)
Drill Bits
FixedCutter
RollerCone
InsertMill ToothDiamondP D C
NaturalDiamond
ImpregnatedDiamondT S P
RollerBearing
JournalBearing
Courtesy of
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Cutting Elements - TSP
TSP
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Impregnated Diamond
Drill Bits
FixedCutter
RollerCone
InsertMill ToothDiamondP D C
NaturalDiamond
ImpregnatedDiamondT S P
RollerBearing
JournalBearing
Courtesy of