T-412 2000 HP Electrical DC Heli-Portable Drilling Rig

The T-412 is a 2000 HP electrical DC heli-portable drilling rig built by Drillmec in 2008 and refurbished in 2014. Designed for remote access operations, it features a Drillmec mast rated to 1,000,000 lbs hook load, a Varco TDS-11SA top drive, National 1320-UE drawworks with Baylor Elmagco auxiliary brake, and three LEWCO WH1612 mud pumps rated at 1,600 HP each. Power is supplied by four Caterpillar 3512C engines via SCR control.

Technical Overview

Key Equipment Specifications

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Mast & Substructure

Mast MakerDrillmec
Hook Load Capacity1,000,000 lbs (12 lines)
Clear Height147 ft
Drill Pipe RangeTriple stands, Range 2
Substructure Rotary Cap.1,000,000 lbs
Setback Capacity600,000 lbs
Floor Clearance25.5 ft

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Drawworks & Top Drive

Drawworks ModelNational 1320-UE
Input Power2,000 HP
Drum BrakeBand
Auxiliary BrakeBaylor Elmagco 7040
Top Drive ModelVarco TDS-11SA
TDS Load Capacity500 tonnes
Max Torque37,500 lbs-ft @ 125 RPM

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Rotary & Iron Roughneck

Rotary TableLanzhou ZP-375
Rotary Capacity650 tonnes
Max Opening37½"
Iron RoughneckHawk Ind. M100K-2GSR

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Mud System

Mud Pumps3 × LEWCO WH1612
Pump Power1,600 HP each
Working Pressure5,000 psi
Mud Tanks7 tanks (~1,250 bbl)
Water Tanks~500 bbl
Shale Shakers4 × Derrick Hyperpool
Mud CleanerMI-Swaco Mongoose 312-10T4

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BOP & Choke

LP Annular PreventerOne 21¼" – 2K
HP Annular PreventerOne 13⅝" – 5K
HP Ram PreventerTwo (DBL+SGL) 13⅝" – 10K
Choke ManifoldOilfield 3-1/16" 10K

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Power Generation

EngineCaterpillar 3512C
Generator Set4 × 1,476 HP
Total Power5,904 HP installed
Control SystemIECS (SCR)

Equipment Gallery

Rig Photos

T-412 2000 HP Heli-Portable Drilling Rig

Capabilities

Key Advantages

01

Heli-Portable Design

Purpose-built for remote-access deployments, the T-412 breaks down into helicopter-sling-loadable packages — ideal for mountain, jungle, or otherwise road-inaccessible terrain where conventional rig transport is not feasible.

02

Deep Drilling Capability

Rated to 20,000 ft with a 1,000,000 lb hook load capacity on 12 lines, the T-412 handles demanding exploration and development programs. The Varco TDS-11SA top drive delivers 37,500 lbs-ft of continuous torque for rotating through tough formations.

03

High-Capacity Mud System

Three LEWCO WH1612 pumps rated 1,600 HP each at 5,000 psi working pressure provide redundant, high-volume fluid circulation. Seven mud tanks totaling ~1,250 bbl plus a four-shaker Derrick solids-control train keep mud properties tight.

04

Robust Power Plant

Four Caterpillar 3512C engines deliver 5,904 total installed HP managed through an IECS SCR control system — providing reliable DC power for drawworks, pumps, and top drive with proven SCR redundancy for extended operations.

Complete Data

Full Equipment Status

General

Rating	2,000 HP
Hook Load	1,000,000 lbs
Drilling Depth	20,000 ft
Year of Construction	2008, refurbished 2014

Mast

Maker & Model	Drillmec
Drill Pipe Stands	Triple stands Range 2
Static Hook Load	1,000,000 lb with 12 lines
Clear Height	147 ft

Substructure

Maker & Model	Drillmec
Rotary Capacity	1,000,000 lb
Setback Capacity	600,000 lb
Clearance	25.5 ft

Drawworks

Maker & Model	National 1320-UE
Rated Input Power	2,000 HP
Drum Brake Type	Band
Auxiliary Brake	Baylor Elmagco 7040

Top Drive

Maker & Model	Varco TDS-11SA
Rated Load Capacity	500 tonnes
Max Continuous Output Torque	37,500 lbs-ft @ 125 RPM

Rotary Table

Maker & Model	Lanzhou ZP-375
Capacity	650 tonnes
Maximum Opening	37½"

Iron Roughneck

Maker & Model

Hawk Ind. M100K-2GSR

Mud Pumps

Quantity	3
Maker & Model	LEWCO WH1612
Rated Input Power	1,600 HP
Working Pressure	5,000 psi

Low Pressure Mud System

Number of Mud Tanks	7
Mud Tanks Total Capacity	~1,250 bbl
Water Tanks Total Capacity	~500 bbl

Shale Shakers

Quantity	4
Maker & Model	Derrick Hyperpool
Mud Cleaner	MI-Swaco Mongoose 312-10T4

Low Pressure BOP

Annular Preventer	One (1) 21¼" – 2K
Ram Preventer	NA

High Pressure BOP

Annular Preventer	One (1) 13⅝" – 5K
Ram Preventer	Two (DBL+SGL) 13⅝" – 10K

Choke Manifold

Type	Oilfield
Size & Pressure	3-1/16" 10K

Electric Generation System

Engine Type	Caterpillar 3512C
Horsepower Rating	4 × 1,476 HP
Control Unit	IECS (SCR)