“Frontier Driller” Offshore Oil Rig
10 DC Drive Bays, 4 Generator Control Bays and much more…

 

Frontier Drilling DC Drive Cabinet.

Frontier Drilling DC Drive Cabinet.

As we mentioned last month we will be highlighting the Frontier Drilling project in greater detail.

The name of the vessel is the Frontier Driller. It is an older rig that is being completely re-furbished with new equipment. Joliet Technologies is responsible for the DC Drives, Generator Controls, Switchgear, MCC’s (Motor Control Centers), PLC’s (Programmable Logic Controls), Transformers, Driller’s Console and Mud Pump Console.

Let’s start with the DC Drive Bays (shown to the right). Joliet Technologies manufactured 10 DC Drive Bay cabinets for this project controlling a total of 16 DC motors. Each custom drive cabinet has 2 Siemens 6RA70 DC Drives. Utilizing the load sharing capabilities of the 6RA70 each drive cabinet will have multiple assignments.

In the photo to the right (looking into the rear of the cabinet) you can see the 2 Siemens 6RA70 drives at the top, side by side. The bottom rear portion of the cabinet has all the DC contactors and DC motor armature connections for each motor that the drive bay can control. This particular drive bay will run up to 5 different motors. The other drive bays will have anywhere from 3 to 5 assignments.

Each drive assignment is connected to an Isolation Switch for safety. This allows any DC motor to be completely isolated and locked out for maintenance and repairs.

DC Drive Bay No. 1

DC Drive Bay No. 1

The front of each drive bay (shown at left) has pilot lights for each assignment for that bay. Amp meter and volt meter for the DC drive the motor is being run from. Selector switch (Off/Drilling/Marine) to select the function for that assignment. Keypad for each of the Siemens 6RA70 DC drives. All drive bays have 2 cooling fans at the top of the control section doors, drip shield and light, grab bar and a 3000Amp draw out circuit breaker. The very bottom front of each drive bay has the 600VAC main bus.

GE 752 DC Drilling Motor

GE 752 DC Drilling Motor

Each drive assignment will run a GE 752 DC Traction Motor (shown at right). There are a total of 16 of these motors on the vessel controlling 4 Mud Pumps (8 motors total), 4 Anchor Winches, 3 Drawworks and Rotary Table. Typically these motors are the workhorses on most drill rigs.

Each DC motor can be run from as many as 3 different drive bays. There are many reasons for this. For example, if maintenance or repairs are required on 1 drive bay, another drive bay can be used. Also the DC drive bay lineup is separated into 2 sections, each having 5 drive bays, so if 1 section is down the rig will still be functional.

As of June 2007 we are very close to the completion of the manufacturing portion of this project and have started the testing phase. We will be shipping 5 DC drive bays and 1 of the 2 Isolation Switch bays after completion of testing and DNV approvals.


To get a Quote for your specific requirements,
Contact Joliet Technologies today.

Call (815-725-9696),
Toll Free (866) 492-9888,
Fax (815-725-9393) or 
E-mail
your requirements and we will prepare a detailed quote for your application.

Or fill out a Request for Quote.

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