well drilling operations

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Well
drilling
Sequence of

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Schedule
Time frame managing
Exploration introduction
THE Drilling SITE
Drilling Rig
Running CSG
Casing CMT
Basic logging

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Exploration and
Geophysics

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Seismic survey

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Let the Story Begin

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THE Drilling SITE01
Once the location for the site has been established, the area is prepared for
drilling, with the following steps:
1. Site Preparation
2.Conductor-rathole-mousehole
3. Transporting Equipment

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THE Drilling SITE01
1. Leveling & site preparation

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THE Drilling SITE01
2. Cellar digging
• A dug-out area,
• located below the rig.
• The cellar serves as a cavity in
which the casing spool and casing
head reside.

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THE Drilling SITE01
2. Cellar digging

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THE Drilling SITE01
3. Mud pit digging

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THE Drilling SITE01
3. Mud pit digging

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THE Drilling SITE01
4. Conductor pipe hammering
Conductor Hole
A large diameter hole bored to facilitate steel pipe. May be cemented in place to allow
conventional oil and gas well drilling operations ,and also allows fluid returns to a mud
system when drilling surface hole.
CONDUCTOR PIPE INSTALLATION
30” OD x 1”. wall thickness has been selected and Affiliate’s standard for world-wide
exploration and development drilling activities
Pile Hammers
• Diesel pile hammers are used for surface driving operations of conductor pipe.
• The driving depth of the conductor pipe is a function of the sediments in the ground.
• The most common used system is a hammer weight of 18t

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THE Drilling SITE01
4. Conductor pipe hammering

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THE Drilling SITE01
4. Conductor pipe hammering Drive Shoe Technology

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THE Drilling SITE01
5. Rathole drilling
Conductor
pipe
Rat-hole mouth hole

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THE Drilling SITE01
5. Rathole drilling
• Rathole
A shallow bored hole under the derrick substructure in which the Kelly is
temporarily stored during tripping operations.
• Mouse Hole
A shallow bored hole under the derrick substructure in which a single drill
pipe joint is temporarily set to facilitate easier connections.

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THE Drilling SITE01
4. Conductor pipe hammering

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THE Drilling SITE01
4. Conductor pipe hammering

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1. Rig Move
Drilling Rig02

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1. Rig Move
Drilling Rig02

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1. Rig Move
Drilling Rig02

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2. Rig up
Drilling Rig02

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2. Rig up
Drilling Rig02
a. Mast Raising

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2. Rig up
Drilling Rig02
b. substructure Raising

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2. Rig up
Drilling Rig02

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2. Rig up
Drilling Rig02

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2. Rig up
Drilling Rig02

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3. Conductor connection
Drilling Rig02
Shaker line

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4. Rig Acceptance
Drilling Rig02
Rig acceptance checklist Rig accept

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5. Pipe rack
Drilling Rig02

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6. Drill Pipe Inspection
Drilling Rig02

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6. Drill Pipe Inspection
Drilling Rig02
Thread cleaning

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6. Drill Pipe Inspection
Drilling Rig02
Thread cleaning

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7. Stands make up
Drilling Rig02

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7. Stands make up
Drilling Rig02
• Single pipe
• Stand “ 3 singles “

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7. Stands make up
Drilling Rig02

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7. Stands make up
Drilling Rig02

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8. Rack back stands
Drilling Rig02

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9. BHA preparation
Drilling Rig02
BHA
• Run a 26" bit + 3 x 9" DC + HW-DP
• Run a 26" bit + float valve + 36" Hole
Opener + 1 x 9" Monel DC + 1 x 9"
Spiral DC + 5" HWDP + 5" DPs
Drill Bit
Drill Collers
Heavyweight
Drill pipe
Hole Opener
Bit sub

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9. BHA preparation
Drilling Rig02

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1. Preparing spud mud
Spud Mud03
• Spud mud
Mud used to drill a well from
surface to a shallow depth. Guar
gum or salt gel are commonly used
offshore as spud mud. Onshore
spud mud is usually a water-base
mud containing bentonite clay that
is flocculated with lime.
MUD SYSTEM SEAWATER & SPUD MUD
Mud Density 8.9 – 12.0 ppg
Rheology @ 120°F/49°C
PV 13 – 15 cps
YP 24 – 32 lb/100 sqft
Gels 11/15- 10/20 lb/100 sqft

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1. Preparing spud mud
Spud Mud03

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1. Preparing spud mud
Spud Mud03
Mixing

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1. Preparing spud mud
Spud Mud03

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2. Spud In
Spud Mud03
A large diameter hole is
drilled using a large
diameter drill bit. Drilling is
conducted by heavy duty
industrial strength drill bits.
The drill bits come in
different sizes according to
the diameter of the hole
being drilled.

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2. Spud In
Spud Mud03
• First, a large drill
bit is used to drill a
short interval of
hole.

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2. Spud In
Spud Mud03

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2. Spud In
Spud Mud03

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2. Spud In
Spud Mud03
1. Mud pumping
2. Mud cleaning
Mudreturnline

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2. Spud In
Spud Mud03

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2. Spud In
Spud Mud03
Drill to the depth of the first two joints using high viscosity mud (80-120 seconds Funnel
viscosity) and at a very slow pump rate,

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2. Mud Cleaning
Spud Mud03

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3. Continue drilling
Spud Mud03
26” conductor pipe 20” pit diameter
36” conductor pipe 30” pit diameter

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4. Hole Cleaning
Spud Mud03
1. Mud pumping
2. Mud cleaning
Mudreturnline

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5. Wiper trip for hole cleaning
Spud Mud03
At TD circulate the hole clean, displace the hole with gel mud
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6. POOH
Running CSG04

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7. surface Casing Running
04 Running CSG

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7. surface Casing Running
Spud Mud0304 Running CSG

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7. surface Casing Running
03
Float show and float coaller
04 Running CSG

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7. surface Casing Running
Spud Mud0304 Running CSG

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7. surface Casing Running
Spud Mud03
Surface casing
04 Running CSG

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8. Casing Cementing
Spud Mud0305 Cementing
Cement functions
Provides zonal isolation.
Supports axial load of casing.
Protects casing against corrosion and erosion
1
2
3
Provides support to borehole in
plastic or unconsolidated formations
4

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8. Casing Cementing
Spud Mud0305 Cementing
Drilling
Fluid
Spacer Fluid
Bottom Plug
Shoe Joint
Top Plug
Cement
A B C
Float Shoe
Float
Collar
Bottom Plug
Ruptured
Top Plug
Released
Plug
Bumped
Displacement
Fluid

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9. Wait on cement
Spud Mud0305 Cementing
To suspend drilling operations while
allowing Cement slurries to solidify,
harden and develop compressive
strength

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10. Cement Job completion
Spud Mud0305 Cementing

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3. Connection casing head9. Wait on cement
Spud Mud0305 Cementing