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A unique feature of the DirectDrive
system allows drilling fluids to pass
through the hollow shaft of the AC motor.
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 No
gearbox.
Plenty of torque.
That's LTI's DirectDrive™.
DirectDrive™ Top Drive systems from LeTourneau Technologies™ Drilling Systems establish
a whole new standard for performance and reliability.
The key to the LTI DirectDrive Top Drive is its patented
AC electric motor design, which eliminates the need
for a gearbox, along with associated
bearing and gearing problems and fluid leaks. The result is a low
maintenance, high-performance, high-reliability top
drive that delivers, meets or exceeds industry standards for high-torque drilling applications.
A fully integrated system.
Available in 250-, 350-, 500-, 750-, and 1000-ton models,
LTI DirectDrive Top Drive systems include everything
necessary to improve drilling efficiency, performance,
and reliability. These systems offer high torque for optimized drilling performance,
while its redundant speed sensing capability provides
for increased operational reliability. In addition,
the main stem assembly can be replaced without having
to remove the motor or unrig, reducing the downtime
required for servicing. Built solid to meet the demands
of the deepest drilling applications, each DirectDrive
Top Drive system is manufactured to the highest standards. The system includes:
- Hydraulic Counterbalance
System
- LeTourneau Technologies™ Power Systems Through-Shaft Design AC Drilling Motor
- Integral Disc Brake System
- Motor Cooling System
- Hydraulic Rotary Head System with Locking Clamps
- Pipe Handling System with Dual Drive 360° Rotational
Capability
- IBOP System
- Electrical / Control Service Loop Kit
- Fluid Service Loop Kit
- Derrick Termination Kit
- Top Drive Dolly
- Block Dolly
- Elevator Links
- 1,000-ton Hook Load Capacity Main Beam
AC motors deliver unmatched performance.
Delivering a consistent, high level of torque, the LTI Power Systems motors used in DirectDrive Top Drives
also provide unparalleled reliability. High-density
magnetic steel and windings put more "copper in
the slot", and deliver up to twice the peak torque
as conventional AC motors, from zero RPM through rated
RPM.
These motors also include more total copper and iron content, providing additional thermal mass, allowing them
to withstand the higher temperatures associated with
continuous operation.
DirectDrive Top Drive systems from LTI have established
a new standard in drilling performance, reliability,
and maintainability.
| LTI DirectDrive™
Top Drive Specifications |
| |
Model
DDTD-500 |
Model
DDTD-750 |
Model
DDTD-1000 |
| Hoisting
capacity |
500 short tons |
750
short tons |
1000 short tons |
| Drilling
capacity |
500 short tons |
750
short tons |
750 short tons |
Direct
drive variable
AC motor performance** |
42,500 ft-lbs
Continuous
Torque;
0-115 RPM
80,000 ft-lbs
Intermittent
Torque;
0-115 RPM |
72,000 ft-lbs
Continuous
Torque;
0-116 RPM
100,000 ft-lbs
Intermittent
Torque;
0-118 RPM |
94,000 ft-lbs
Continuous
Torque;
0-112 RPM
130,000 ft-lbs
Intermittent
Torque;
0-118 RPM |
| Continuous HP |
1040 from
120-240 rpm |
1575 from
120-240 rpm |
2090 from
120-240 rpm |
| Static
brake capacity |
35,000 ft-lbs |
57,000
ft-lbs |
65,000 ft-lbs |
| Pipe clamp capacity |
80,000 ft-lbs |
110,000
ft-lbs |
110,000 ft-lbs |
| Mud
passage @7500 psi |
3" |
4" |
4" |
IBOPs,
remote-actuated upper &
manual-actuated lower |
15,000 psi |
15,000
psi |
15,000 psi |
| Hook
weight |
43,500 lbs |
65,000
lbs |
105,000 lbs |
| Height |
26' w/108"
elevator bails |
28'
w/120" elevator bails |
33' w/132"
elevator bails |
| Width
x depth |
7' x 5' |
8.2'
x 5' |
9.4' x 6.8' |
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