The choice of drilling method depends upon:
Cost,
Well spacing and
Mechanical conditions
of a vertical well bore
In addition,
reservoir consideration.
BUILD RATES
Ultra-short Radius
Short Radius
Medium Radius
Long Radius
ULTRA-SHORT RADIUS
45 to 90 degrees per
foot
Special equipment
Horizontal lengths of
100’ to 200’
Used in unconsolidated, heavy
oil sands and
soft formation.
Impossible to log the
open hole section.
An ultra-short radius
drain hole is drilled using endless 1¼ inch tubing.
Uses a jet under high
pressure to cut the formation and advance the endless tubing.
twenty-four laterals
can be drilled at the same horizon.
SHORT RADIUS
1.5 to 3 degrees per foot.
Needs special equipment
Mechanical and motor
systems are
available.
Typically used in
sidetracking existing wells
to bypass water producing or troublesome.
Bending stress and
fatigue can be a problem
200’ to 1000’
horizontal section
The horizontal
section can be cased with a slotted liner or left open hole.
Open hole logging
capabilities are limited for the horizontal section.
MEDIUM RADIUS
The first medium
radius wells were drilled in 1985
6 to 35 degrees per 100’
build rates
Uses conventional
equipment
Horizontal section
lengths have been drilled over 7000’ but typically 2000’ to 4000’
LONG RADIUS
2 to 6 degrees per
100’ build rates
Uses conventional
equipment
Horizontal section
lengths have been drilled over 10,000’ but typically 3000’ to 5000’
No problem with
bending stress, fatigue or completion equipment
Build section is
steerable, which means the motor can be rotated in the build section
Offshore uses long radius
almost exclusively since longer departures are required before the well gets to
be horizontal
Wells are more easily
logged.
Our Lifting Wire Rope are Fully lubricated in manufacture and during supply. Caliber lifting solutions is a sister concern of BETAL which was founded in 1999 to provide services in lifting industry. Headquartered in Mumbai, India with state-of-the-art facilities in Navi Mumbai and Nashik.
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