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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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