Download - Understanding API 4F Structures
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FAMILIZARITION OF DRILLING &
WELL SERVING STRUCTURES
API SPEC 4F - Internal Training
BY:
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What are Well Serving Structures?
These processes are done by travellingblocks, rotary table, racking boards, deadlines anchors, drums, etc.
Well Serving Structures are structures
that support these pipes, equipment and
mechanisms.
R
W.L
Seabed
Crown Block
Derrick
(Upper Sec)
Derrick
(Lower Sec)
Sub-
Structure
When oil field is found on land or underthe sea, drilling equipment (DEs) are
brought to the site on mobile offshore
drilling units (MODU)
When oil field is found on land or under
the sea, drilling equipment (DEs) arebrought to the site on mobile offshore
drilling units (MODU)
At the site, Drill pipes are erected, joined
and brought down into the sea.
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Crown Block
Firs
API
Clu
SheAPI S
Crown Block
Main membersAPI SPEC 4F/ AISC 335-89
Shafts &
Shaft HousesAPI SPEC 4F
Handrail & KickPlate
(Prevention of
drop objects)API SPEC 8C
First Line
(Wire Rope)API RP 9B
Clu
(W
API
Design - AISC 335-89 (CH D, E, F, H, J)
Fabrication - AISC 335-89 (CH M)
WeldingAWS D1.1/D1.1M:2010
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Crown Block (Cont.)
Gin-pole
A hosting arm mounted on main members
Used for lifting during maintenance of crown block equipment
Substitute in the place of frame structures of early kind of crown block
Frame Structures used for lifting of
crown block equipment
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Padeye attached to Crown Block Structure
Padeye for Tugging Padeye for Lifting of Crow
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Reeving Components
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Wire Rope
Selection of wire rope, clips and thimble eyes are done in accordance with API RP 9B 4 th Editi
Wire rope Clip
Thimble Eye
Turn Back Length
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Derrick vs Mast
Derrick
Bolts & Nut connected Structure
Disassemble member by member during
transportation when necessary
Mast
Welded Structure
Lay down during transportation when
necessary
Design - AISC 335-89 (CH D, E, F, H, J)
Fabrication - AISC 335-89 (CH M)WeldingAWS D1.1/D1.1M:2010
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Travelling Block & Guide Track
Travelling Block runs up and d
tracks to raise and lower drill p
Travelling Block
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Racking Board (Finger Board)
In derrick, racking boards are inside the structural frame, but they are outside of the frame in
Racking boards are used as a support to rack drill pipes
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Bolt & Nut Connections in Derrick
Main Vertical Members Connections
Diagonal Members Connections
Anchor Bolt Connection
Derrick members are joined by bolts & nuts which are selected by using
Specification for Structural Joints using ASTM A325 or A490 Bolts
Derrick Structure is fixed at four locations at
anchor bolts connection
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Mast Support A Frame
Operating Condition Lay Down Condition
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Sub-Structure
Equipment and mechanism required for drilling are
mounted on drill floor.
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Sub-Structure
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Main Equipment on Drill Floor
Deadline Anchor and Spool
Draw Work Drum
Ch
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