Rig components

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| Email : Eng20072007@gmail.com | YouTube : PetroleumandNaturalgasCoursesEng. Elsayed Amer
Rig Component
G u i d e t o O i l w e l l D r i l l i n g

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Well drilling operation

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DRILLING
PERSONALS
Contractor
Owner

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Contractor company
Drilling contractor Service comp Owner

Eng.Elsayed Amer
01 Hoisting System
02 Rotating System
03 Drill string handling equipment
04 Mud Circulating System
Introduction
Main Rig
Systems
05 Power Generation System
06 Blowout Prevention System
Eng. El Sayed Amer

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Hoisting System
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Used for raising and lowering the drilling assembly, running drill pipes,
casing, completion equipment and other tools in and out of the hole.
Hoisting System Components
Substructure
Derrick
Crown block
Travelling assembly
Draw works
Drilling line
Hoisting System

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Main Components
Hoisting System
Derrick
Substructure

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1. Substructure
Hoisting System

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The substructure is the supporting
base for:
Consist of steel beams, that can easily
be dismantled, and rests on concrete
foundations around the cellar.
Its height varies from a few meters up
to 10 m in the largest rigs.
1. Substructure
Hoisting System
Derrick or mast,
draw work
rotary table,
Rig floor,

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01
02
03
1. Substructure
Hoisting System
Name of the builder
Address
API standard (ie API 4f)
Maximum static load of rotary table04
Serial number05
Height (ft)06
Maximum setback static load07
API name plate contains:

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1. Substructure
Hoisting System
Substructure specification example of 2000 hp rig:
▪ Substructure Height: 35 ft.
▪ Casing capacity: 1,000,000 lbs.
▪ Setback capacity: 800,000 lbs.
▪ Combined Capacity: 1,800,000 lbs.
▪ Clearance from bottom of rotary beam: 30 ft.
▪ BOP handling system capacity: up to 150 T.
▪ Large drill floor: Approx. 39 x 46 ft.

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Depth reference
1. Substructure
Hoisting System

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Cat Walk
Pipe rack
Rig floor
Cable tray
Catwalk Is an elongated platform about
1 m high,
Located near the rig floor where pipe is
laid in and lifted into the rig floor by
special lifting equipment
The catwalk is connected to the rig floor
by a pipe ramp.
1. Substructure
Hoisting System
1.1 Cat walk
Product Name

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• Hydraulic Catwalk System • Mechanized Catwalk System
1. Substructure
Hoisting System
1.1 Cat walk

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▪ A vee-door is the opening shaped like
an upside down V in one side of a
derrick, which allows long pipes and
tools to be lifted onto the rig floor.
▪ Also called pipe ramp
vee-door
Cat Walk
1. Substructure
Hoisting System
1. Substructure
Hoisting System
1.2 vee door

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Cable tray
1. Substructure
Hoisting System
1. Substructure
Hoisting System
1.3 Cable Tray

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1. Substructure
Hoisting System
1. Substructure
Hoisting System
1.4 Stairs
Main stair
Mud system
stair

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1. Substructure
Hoisting System
1. Substructure
Hoisting System
1.5 Rig Floor
Rig tongue
Rotary table
Dog house
Mast supports
Driller console

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1. Substructure
Hoisting System
1. Substructure
Hoisting System
1.6 BOP Crane
BOP cranes

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✓ The derrick is an open-framework structure of steel
beams,
✓ Provide a vertical height to permit the vertical
movement of the travelling block for a distance
greater than the equivalent of one stand.
✓ The derrick is designed to resist the loads tripped in
and out of the well in the operating phases, which
induce both static and dynamic stresses.
Hoisting System
2. Derrick
Hoisting System

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Dual derrick Mast
Hoisting System
2. Derrick
Hoisting System

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The range of Derricks & Masts designs:
✓ Static Derricks (Jack Ups & Platforms)
✓ Dynamic Derricks
✓ Dual Derricks
✓ Offset Derricks
✓ Cantilever
✓ Folding Masts
✓ Telescoping Masts
✓ Bootstrap Masts
Hoisting System
2. Derrick
Hoisting System

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✓ Every derrick has a rated load capacity,
defined by API (American Petroleum
Institute) standards, which establish the
maximum hook load
Hoisting System
2. Derrick
Hoisting System
Drilling rig derrick capacity
Max. Derrick Load 450,000 lbs
Static Hook Load 333,000 lbs ( 8 lines )
Static Hook Load 357,000 lbs ( 10 lines )
Setback Capacity 225,000 lbs
Max. Derrick Load 450,000 lbs

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Derrick are normally used on Offshore rigs and can
be divided into categories:
• Stationary Derrick :
Derrick used on offshore fixed structures
• Dynamic Derrick:
Heavyweight derrick used on floating rigs
subjected to marine stress.
Hoisting System
2. Derrick
Hoisting System

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Nameplate Information
Hoisting System
2. Derrick
Hoisting System

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Hoisting System
2. Derrick
Hoisting System
Crown block
Mast frame Monkey board
Drilling line
Traveling block
Travelling block
Top driveA - Frame

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The small platform that the derrickman stands
on when tripping pipe.
Monkey board
Hoisting SystemHoisting System

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A drawworks is the primary hoisting machinery
component of a rotary drilling rig.
Draw Work
Its function is to provide a means of raising and
lowering the traveling block.
The capacity of the drawworks that
characterizes a rig and indicates the depth
rating for the boreholes that can be drilled.

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Draw Work

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Draw Work

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✓ Diesel engines are directly connected
(compounded) to the draw work by chain.
✓ This system is still in use for small Drilling Rigs
(under 1500 HP), but is no longer used on
medium-Hi powered rigs( 1500 & 3000 HP).
Depending on the engines on the rig, the drawworks
can be either:
MECHANICAL
Draw Work

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✓ Electrical system are normally used today on land
rigs and is the only system in use on offshore rigs.
✓ The drawworks are generally connected to 1000
HP D.C. engines, although A.C. engines are now
being used as well.
Depending on the engines on the rig, the drawworks
can be either:
Electrical
Draw Work

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A modern drawworks consists of five main parts:
The apparatus can be powered by AC or DC
Main Drum
Catheads
Main Brake
Auxiliary brake
Main Drum
Main Brake
Auxiliary Brake
Draw Work

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a. Main Brake
The main brake, usually operated
manually by a long handle, may be a
friction band brake,
Draw Work

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Draw Work

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b. Catheads & Breakout
Cathead
Catheads are winches with pneumatic
clutch and are mounted on the
extremity of the secondary drum of the
drawworks.
The make up cathead is located
beside the driller's console and the
break-out cathead is located on the
opposite side of the driller's console.
Draw Work

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• The auxiliary brakes are used only when going in the hole on a trip. These are used to prevent
burning the band-type brakes.
• The auxiliary brakes are of two types:
A. The hydro-dynamic type braking is provided by water being impelled in a
direction opposite to the rotation of the drum.
B. The electromagnetic type braking is provided by two opposing magnetic fields.
The magnitude of the magnetic fields is dependent on the speed of rotation and the
amount of external excitation current supplied.
• In both types of auxiliary braking systems, the heat development must be dissipated using a
liquid cooling system.
b. Auxiliary brake
Draw Work

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❖ The drilling line contained in the hoist drums consists of
helically-wound steel-wire strands around a plastic,
vegetable fiber or steel core.
❖ The first end of the drilling line (fast line) is wound around
the hoist drum,
❖ The factors to consider in the drilling line choice are:
❖ Diameter Breaking strength
❖ Flexibility Elasticity
❖ Corrosion strength Abrasion resistance
❖ Distortion strength
Drilling Line

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❖ Wire Rope is composed three parts:
- the core,
- the strand and
- the wire.
❖ slipping and cutoff, is performed when
a given value of the work carried out by
the line has been reached.
Drilling Line

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Right Lang Lay
Left Lang Lay
Right Regular Lay
Left Regular Lay
Types of Wire Rope Lay
Drilling Line

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Type of Wire Rope Construction
Shallow:
Deep:
1” to 1-1/8” diameter
1-1/4” to 2” diameter
Contruction: 6 x 19 S or 6 x 21 S or 6 x 25 FW, RRL, IPS or EIP, IWRC
Drilling Line

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Drilling Line

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6 X 7 with
fiber core
6 X 19W with
fiber core
6 X 19S with
fiber core
6 X 19 with
IWR core
6 X 21
Filler Wire
with fiber
core
6 X 25
Filler Wire
with fiber
core
6 X 25
Filler Wire
with IWR
core
6 X 25 Seal
with IWR
core
6 X 27 Seal
with IWR
core
6 X 31 Seal
with IWR
core
IWR = Independent Wire
Rope
Drilling Line

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The crown block is a fixed set of pulleys
(called sheaves) located at the top of the
derrick or mast, over which the drilling line
is threaded.
❖ consists of a set of sheaves (usually
from 3 to 7) supported by a framework
of steel beams.
Crown Block

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Sheaves
Crown Block

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❖ The Travelling Block is a set of
sheaves (pulleys) that move up and
down in the derrick. (one fewer
than for the crown block),
❖ The number of sheaves in the
crown and travelling block is
chosen on the basis of the rated
capacity of the tower
The number of the pulleys used on the two
Blocks can vary from 5 to 8, providing a variable
capacity to the Hoisting system.
Traveling Block

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Traveling Block

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o high-capacity J-shaped equipment
used to:
▪ hang various equipment,
particularly the swivel and
Kelly, the elevator bails or top
drive units.
▪ The hook is attached to the
bottom of the traveling block
and provides a way to pick up
heavy loads.
Hook

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o The drilling line is stored on a spool
Periodically, some of the drilling line is
cut off at the draw works and
additional line is pulled off the spool to
replace the cut line
Drilling Line spool

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❖ deadline anchor is used to tie down the drill
line and measure the load suspended from
the top drive, i.e. hook load. The wire drum
attached to the anchor is designed to rotate
during a slip-and-cut procedure
Deadline anchor

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Deadline anchor

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❖ The control panel, located
on rig floor, where the
driller controls drilling
operations.
Driller panel

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Driller panel

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❖ An air hoist or horse , man
ride is a safer way to lift
heavy objects to rig floor.
Air hoist

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Dog house
Hoisting System

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Rotating System
02

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The system of rotation is intended to cause
the drill string to rotate.
Rotary table
Kelly or Top Drive
Kelly Bushing
Master Bushing
Top drive System
Drill Pipe
Drill Collars
Bit
Swivel
Kelly
Kelly Bushing
K.B. Elevation
Rotary Table
Rotating System Components
Function
Rotating System

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o The top drive is a relatively recent piece of equipment,
introduced towards the mid-1980s, grouping together
in a single unit
o The equipment for connecting the drill pipes, rotation
of the drill string and circulation of the fluid
o The top drive unit is suspended from the hook and is
guided by two vertical rails fixed to the derrick, which
provide the reactive torque necessary to prevent the
rotation of the whole complex and to allow free
vertical movement.
Top Drive
Rotating System

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Top
drive
Rig floor Drill pipe
‘A’ frame
Guide
rails
Top Drive
Rotating System

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Top Drive
Rotating System

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Top Drive
Rotating System

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the use of the top drive instead of the rotary table offers numerous advantages, including:
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Contain its own swivel assembly
Performing trip-out operation while circulating mud and rotating the string
(back reaming),
Allow fewer connections where it connect stand by stand (30 m) in
one connection
4 Allow rotation while lifting ( back reaming )
Top Drive
Rotating System

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o The rotary tool that is hung from the hook
of the traveling block to suspend the
drillstring and permit it to rotate freely.
o It also provide connection for the rotary
hose and provide passageway for the flow
of drilling fluid into the drill stem.
Swivel
Rotating System

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o Old fashion
o It transmits the power from the
rotary table to the drill string.
o At the same time it serves as a
conduit for the drilling fluid,
o It absorbs torque from the drill string
and carries the entire axial load.
o It is the most heavily loaded
component of the drill string.
Kelly
Rotating System

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o Due to Kelly length (12 m) only one
joint could be added
o The Kelly is a square or hexagonally
shaped pipe
Kelly
Rotating System

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Kelly
Rotating System

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Kelly
Rotating System

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o used to transmit torque from the rotary
table to the Kelly. The Kelly bushing is
designed to be the connection between
the rotary table and the Kelly.
Kelly Bushing
Rotating System

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o A device that fits into the rotary table to
accommodate the slips and drive the Kelly
bushing so that the rotating motion of the
rotary table can be transmitted to the Kelly.
Also called rotary bushing.
Master Bushing
Rotating System

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Master Bushing
Rotating System

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o A rotary table is a mechanical device on a
drilling rig that provides clockwise
rotational force to the drill string to
facilitate the process of drilling a
borehole.
o Most rotary tables are chain driven
Rotary table
Rotating System

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Rotary table
Rotating System

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Rotary table
Rotating System

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Tubular Handling Equipment
03

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o Is an assemblage of hollow pipes of circular section,
extending from the surface to the bottom of the hole.
o It has three functions:
✓ it takes the drilling bit to the bottom of the
hole, while transmitting its rotation and its
vertical load to it.
✓ It permits the circulation of the drilling fluid to
the bottom of the hole.
✓ it guides and controls the trajectory of the hole.
Drill string
Tubular Handling

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Drill string
Tubular Handling
o Drilling String Components:
The Drill String includes all tubular equipment
between the Kelly Swivel and the bit
✓Kelly
✓Surface Safety Valves
✓Drill Pipe
✓Heavy Weight Drill Pipe
✓Drill Collar
✓Jars - Shock Subs - Bumper Subs - Junk
Baskets - Accelerators etc...

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o The drill pipes are hollow steel pipes
of various types, with two tool joints
welded at their ends.
o They are standardized according to
API standards and classified on the
basis of their length (usually about 9
m), their outside diameter, their
linear weight and their steel grade.
Drill Pipe
Tubular Handling

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Drill Pipe
Tubular Handling

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Drill Pipe
Tubular Handling

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Drill Pipe
Tubular Handling

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Drill Pipe
Tubular Handling
No Grooves = Grade E-75
1 Groove = Grade X-95
2 Grooves = Grade G-105
3 Grooves = Grade S-135

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Stab in Guides
Tubular Handling
o Prevent damage to threads or seals
while joints are being added to or
removed from the string.

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o Hevi-Wate drill pipe is an intermediate
weight drill stem member. It consists of
heavy-wall tubes attached to special extra-
length tool joints. It has drill pipe dimensions
for ease of handling. Because of its weight
and construction, Hevi-Wate drill pipe can
be run in compression the same as drill
collars in small diameter holes and in highly
deviated and horizontal wells.
Heavy Weight Drill pipe
Tubular Handling

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o Similar in appearance to a drill pipe, HWDP has
the following different dimensional
characteristics; the tube wall is heavier about
1”thick in most sizes, the tool joints are longer,
and the tube section has a larger diameter at
mid length to protect the pipe from wear.
Tubular Handling

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Tubular Handling
Heavy Weight Drill Pipes Function
HWDP is used to absorb the stresses being
transferred from the Drill Collars to the Drill Pipe.
The major HWDP benefits are:
o Increased wall thickness
o Longer tool joints
o Uses more hard facing
o May have a long central upset section

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o Drill collars have larger outer diameter
and smaller inner diameter than drill
pipe. The functions of drill collars are:
▪ Provide the required weight on bit
while drilling
▪ Maintain drill string in tension which
reduces bending and fatigue failures.
▪ Provide stiffness for directional
control
Drill collar
Drillpipe
An 8” OD drill collar weighs 150 lbs/ft or 4500
lbs each
Drill Collar
Tubular Handling

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Drill Collar
Tubular Handling
Types
o Comes in many OD and ID sizes
o Typically 3 1/8" to 11" OD, Most commonly in
lengths of 30 - 31 ft
o Both slick and spiral drill collars are used.
o Spiral collars where there is chance of getting stuck
o where differential sticking is a possibility spiral drill
collars and spiral HWDP should be used in order
to minimize contact area with the formation.

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Drill Collar
Tubular Handling

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o A short, threaded piece of pipe used to adapt parts of the drilling string
that cannot otherwise be screwed together because of difference in
thread size or design.
o These consist of:
Subs
Tubular Handling
Bit Sub
Crossover Sub
Kelly Saver Sub
Lifting Sub
Bent Sub

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o Subs are classified into four main categories:
Subs
Tubular Handling
Bit Sub or crossover subs are used to connect the drill bit to the first piece of BHA equipment or to
crossover connections in the drill string. Drill bits are manufactured with a pin, making make-up
impossible without a bit sub.
Workover subs or circulating subs are used to limit the allowable fluid-circulation rates.
Lifting Sub or handling subs are used to lift BHA components from the catwalk to the rig floor.
Top drive subs or saver subs serve as the sacrificial element between the drill string and the top drive,
reducing repair and maintenance costs.

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Subs
Tubular Handling

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Subs
Tubular Handling

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Subs
Tubular Handling

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Subs
Tubular Handling

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Subs
Tubular Handling

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Subs
Tubular Handling

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Subs
Tubular Handling

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o Equipment used to move, make and break connection, suspend tubular on the
rig. These include the following:
Handling Equipment
Tubular Handling
Top drive Links
Elevator
Lifting Subs
Lifting Sub
Slips
Safety Clamp
Tongs
Pipe Spinner
Bit Breaker
Thread Protectors
Safety Clamps

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o Equipment attached onto the top drive in order to suspend
the Elevators.
Handling Equipment
Tubular Handling
Top drive Links

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o Clamps that grip a stand of casing, tubing, drill
pipe or drill collars so that the stand or joint can
be raised from or lowered into the hole opening
of the rotary table.
Handling Equipment
Tubular Handling
Pipe Elevator

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Handling Equipment
Tubular Handling

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Handling Equipment
Tubular Handling

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o Slips is a device used to grip and hold the upper part of a drill string to the drill
floor on an oil rig.
o hanging the string on rotary table
Handling Equipment
Tubular Handling
Slips

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Handling Equipment
Tubular Handling
Slips

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Handling Equipment
Tubular Handling
Slips

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Handling Equipment
Tubular Handling
Slips
Drill Pipe SlipsDrill collar Slips Casing slips

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Handling Equipment
Tubular Handling
Safety clamp
o used on tubular above the slips to
prevent dropping the string should the
slips fail to hold.

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Safety clamp

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Handling Equipment
Tubular Handling
Single Joint Elevators
o designed to replace unsafe rope slings for hoisting
collar- type pipe into position.

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Make up Tong Breakout Tong
Handling Equipment
Tubular Handling
Rig tong
o Used to make up and brake down drill string.

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Rig tong

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Handling Equipment
Tubular Handling
Rig tong

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Handling Equipment
Tubular Handling
pipe Spinner
o A pneumatically operated device
usually suspended on the rig floor
used to make fast connections
and spin off of drill pipes.

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5.
pipe Spinner

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Handling Equipment
Tubular Handling
Bit breaker
o A device that is placed on top of
the rotary table to enable the bit
to be made up to drill string.

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Handling Equipment
Tubular Handling
Drifts
o Sometimes referred to
as rabbits Normally the
drift is used to establish
that the tubular has a
predetermined inside
diameter.

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Mud Circulation System
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o A major function of the fluid circulating system is to remove the rock cuttings
from the hole as the drilling progresses
System
Mud Circulation
Function
Mud Pump
Standpipe
Swivel
Drillstring
Return Line
Principal Components:
Shale Shaker
Desander
De-silter
Degasser
Mud Pit

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System
Mud Circulation

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o A large, high-pressure reciprocating
pump used to circulated the mud
on a drilling rig.
o The mud pumps take the fluid from
the pit and pump it into the well
• Triplex pumps
• Duplex pumps
o Receive their power from an
electric motor independent from
other uses.
Mud Circulation
Mud pumps

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Mud Circulation
Mud pumps

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Mud Circulation
Mud pumps

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o to absorb the mud pump's
pressure surges (changes in
flow velocity), creating a
steady-state (non-surging)
flow of mud under more-or-
less constant pressure, which
lessens wear on the hose
(and other mud system
components).
Mud Circulation
MUD PUMP ACCESSORIES
A) Pulsation Dampeners.

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Mud Circulation
MUD PUMP ACCESSORIES
A) Pulsation Dampeners.

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o its purpose is to divert the
flow of mud in desired path.
towards the drill line or
toward the drill string
o it also has the connection
ports where pressure the
temperature sensor are
connected.
Mud Circulation
Stand pipe manifold

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o The fluid is pumped up the standpipe and
through the rotary hose into the swivel
Mud Circulation
Stand Pipe

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o large-diameter (3- to 5-in.inside
diameter),
o high-pressure flexible line used to
connect the standpipe to the swivel.
o This flexible piping arrangement
permits the kelly (and, in turn, the
drillstring and bit) to be raised or
lowered while drilling fluid is pumped
through the drillstring.
Mud Circulation
Rotary hose

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Mud Circulation
Rotary hose

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o The passageway of the drilling fluid as it comes out of the well.
Mud Circulation
Mud return

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o An equipment the uses a
vibrating screen to remove
cuttings from the
circulating fluid in rotary
drilling operations.
Mud Circulation
Shale Shaker
POSSUM
BELLY
From mud
return line
Vibrator motor
Screens
Shale shaker

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o A centrifugal device for
removing sand from the
drilling fluid to prevent
abrasion of the pumps.
Mud Circulation
Desander

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Mud Circulation
Desander

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Mud Circulation
Desilter
o Also a centrifugal device for
removing free particles of
silt from the drilling fluid to
keep the amount of solids
in the fluid at the lowest
possible point.

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Mud Circulation
Degasser
o A device that removes air or gases (methane, H2S, CO2 and others) from drilling
liquids.
o There are two generic :
I. by pulling a vacuum on the mud
II. by increasing the surface area available to the mud so that bubbles
escape
o If the gas content in the mud is high, a mud gas separator or "poor boy
degasser" is used, because it has a higher capacity than standard degassers and
routes the evolved gases away from the rig to a flaring area complete with an
ignition source.

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Mud Circulation
Degasser

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Mud Circulation
Mud tanks
o Used to store drilling
fluid on a drilling rig.
They are also
called mud pits.

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Mud Circulation
Mud tanks

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Mud Circulation
Reserve Pit
o The reserve pit may be used
to store spare or waste mud,
base oil or brine. In
operations on land, the
reserve pit is usually a
plastic-lined, earthen pit, in
which waste mud is stored
until final disposal.

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Mud Circulation
Reserve Pit

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Mud Circulation
Mixing hopper
o The reserve pit may be used to store
spare or waste mud, base oil or brine.
In operations on land, the reserve pit is
usually a plastic-lined, earthen pit, in
which waste mud is stored until final
disposal.

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Power system
05

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Power system
Power Generation system
o The power system of a rotary drilling rig has to supply
power to all the other systems.
o the system must provide power for:
I. pumps in general,
II. rig light,
III. air compressors, etc.
o Since the largest power consumers on a rotary
drilling rig are:
I. the hoisting,
II. the circulation system, and the rotary system,

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Power system
o the sources of energy are diesel fueled
engines.
o Most rigs use 1 to 5 engines to power
the drawworks and rotary table.
o The engines are usually rated between
400 and 800 hp.
o As guideline, power requirements for
most onshore rigs are between 1,000 to
3,000 hp.
o Offshore rigs in general use much more
power.

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Power system

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Power system
SCR
o The power on modern rigs is most commonly generated by diesel-
electric power units.
o The power produced is AC current which is then converted to DC
current by the use of SCR (Silicon Controlled Rectifier).
o The current is delivered by cables to electric motors attached
directly to the equipment involved such as:
I. mud pumps,
II. rotary table,
III. Drawworks etc

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Power system
SCR

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Power system
Diesel Tank
o Fuel tank for generator

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Well control System
05

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o BOP system is designed and used to prevent uncontrolled release of fluids and
liquids by sealing, controlling, and monitoring oil and gas wells.
Well control system
Function
Annular Blowout Preventer
Ram Blowout Preventer
Diverter
Manifold, Valves and Sensors
Accumulator
Principal Components:
Inside BOP
A
S
B
P
P

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Well control system
BOP stack

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Well control system
Diverter BOP
is an annular preventer with a large piping system
underneath. It is utilized to divert the kick from the rig
and it can be used when the conductor pipe is set. Mud return line
Flare Line

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Well control system
BOP stack
o large valves located on the wellhead during
drilling operations ,able to fully shut-in the
well in just a few tens of seconds, whatever the
working conditions.
o Consists of:
i. Annular BOP
ii. Ram BOP

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Well control system
BOP stack
i. Annular BOP
Annular blowout preventer (Annular BOP)
is a special mechanical device used to seal,
control, and monitor oil & gas well.
Annular BOP is placed on the top of ram
preventers. It is called annular due to its
structure; it surrounds top of the wellbore
in a shape of a ring or an annulus.

170
Well control system
Annular BOP

171
Well control system
BOP stack
ii. Ram BOP
a special assembly used during drilling
as part of blowout prevention system.
The shut-off valves in ram preventers
close by forcing or ramming themselves
together. Ram BOPs close the well by
rams which operate in unison and
actuated by hydraulic cylinders. Ram
BOP has several types of rams, such as
pipe ram, blind ram, shear ram and
blind shear ram.

172

173
Well control system
BOP Ram

174
Well control system
BOP stack

175
Well control system
BOP stack

176
Well control system
Subsea BOP

177
Well control system
BOP control Panel

178
Well control system
Choke manifold
o The arrangement of piping and
special valves, called chokes,
through which drilling mud is
circulated when the blowout
preventers are closed to control
the pressures encountered
during a kick.

179
Well control system
DRILLING CHOKE
CONTROL PANEL

180
Well control system
accumulator
o The storage device for
nitrogen pressurized
hydraulic fluid, which is used
in operating the blowout
preventers.

181
ST 4
2000 hp drilling rig
Sino Tharwa Drilling Company
Rated Drilling Depth
Mud Pumps
Mud Tanks
Power Supply
Well Control Equipment
Rotary Table
Hook load
Draw Works
Derrick
Safety Equipment
Camp
20,000 ft. with 5” drill pipe.
Eng. Elsayed Amer
Static load capacity 1,000,000 lb
Height 149 ft
2000 hp
drilling line 1 1/2”
Rated capacity 1,000,000 lb
Max. Opening 37-1/2”
Height 29.5 ft
Two Triplex
1600 hp Rated input power
5000 psi working pressure
Total number 6 tanks
Total capacity 2250 bbl
3 ea. Engine Cat 3512 B
• 21 ¼” x 2000 psi diverter system
• 13 5/8” annular preventer 5000 psi.
• 13 5/8” double ram preventer 10000 psi.
• 13 5/8” single ram preventer 10000 psi
• Accumulator unit 3000 psi working
pressure with 210 gallon capacity & 20
bottle installed
To accommodate 80 person
As required by regulations

182
Drilling Time & Cost Impact
Eng. Elsayed Amer
Section
Lengths
Time Savings
(Days)
Dayrate Cost
($70k / day) Casing Cost Cement Cost Total Cost
26" Hole 1500 Base Case -$ 81,000.00$ 41,000.00$ 122,000.00$
16" Hole 6445 Base Case -$ 278,075.00$ 118,000.00$ 396,075.00$
14" Hole 4740 Base Case -$ 378,000.00$ 110,000.00$ 488,000.00$
12 1/4" Hole 2315 Base Case -$ 465,000.00$ 106,000.00$ 571,000.00$
8 1/2" Hole 3430 Base Case -$ -$ -$ -$
Total Depth 18430 Base Case -$ 1,202,075.00$ 375,000.00$ $1,577,075.00
Section
Lengths
Time Savings
(Days)
Dayrate Cost
($70k / day) Casing Cost Cement Cost Total Cost
26" Hole 1500 0.00 $0.00 81,000.00$ 41,000.00$ 122,000.00$
16" Hole 6855 0.57 $39,861.11 292,425.00$ 125,506.59$ 457,792.71$
14" Hole 4081 (1.83) ($128,138.89) 328,575.00$ 94,706.75$ 295,142.86$
12 1/4" Hole 2303 (0.03) ($2,333.33) 456,909.00$ 105,450.54$ 560,026.21$
8 1/2" Hole 3393 (0.10) ($7,194.44) -$ -$ (7,194.44)$
Total Depth 18132 (1.40) ($97,805.56) 1,158,909.00$ 366,663.89$ $1,427,767.33
$149,307.67
Original Design Cost Benefit
Revised Design Cost Benefit
Estimated Total Savings =

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