DOSECC

GLAD800 & GLAD200

The GLAD800 (Global Lake Drilling 800m) and the GLAD200 (Global Lake Drilling 200m) were designed to collect long continuous core in lake sediments. Modern lakes preserve proxies that document regional climate history at high resolution, therefore, collection and analysis of lake sediment cores is critical for determining the global climate record.

GLAD800 (Global Lake Drilling 800m) System

The GLAD800 was developed in response to a need to collect long cores from modern lakes. This system was designed in cooperation with the paleoclimate community and PAGES (Past Global Changes, International Geosphere Biosphere Programme) to satisfy their scientific requirements with an easily transported system that includes a drill rig and modular barge. The general configuration of the system consists of a modified Christensen CS-1500 diamond coring rig supported by a barge.

The GLAD800 Rig Specifications are posted on this website. The system has the following characteristics.

• The drill rig either can operate from different floatation systems or can be used on land as a typical diamond core rig; plans are underway to provide cantilevered installation on various mid- to large-size ships .
• The barge can be anchored allowing it to be deployed in waters up to 200 m depth; when operated from a ship, anchoring or dynamic positioning are used.
•  Active heave compensation system underwent sea trials in November 2001 aboard the Woods Hole vessel R/V Knoor, and was used during a three-week drilling program in September-October 2002.
• The rig will collect core of 6.2 cm diameter up to a depth of 800 m (water + sediment).

The GLAD800 system is a joint venture between the International Continental Scientific Drilling Program (ICDP) and DOSECC. For more information concerning the system, please contact Dr. Dennis Nielson ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it ), or Dr. Ulrich Harms ( This e-mail address is being protected from spambots. You need JavaScript enabled to view it ).

In the Spring of 2001, the DOSECC Board of Directors named the GLAD800 System the Research Vessel (R/V) Kerry Kelts, as a memorial to Dr. Kerry Kelts, who passed away earlier that year after a long illness. Kerry was a
major proponent of the GLAD800 system and very active in the International Lake Drilling Community (PAGES).

Link to Geotimes article here.

Projects on which the GLAD800 system was used include the following:

• Great Salt Lake Drilling Project
• Bear Lake Drilling Project
• Englebright Reservior Drilling Project
• Lake Titicaca
• Lake Qinghai
• Lake Peten Itza

GLAD800 Rig Specifications

The GLAD800 is a complete drilling system that includes a drill rig, drill rods and riser pipe, down-hole tools, inventory and machine shop, and facilities for preliminary core description and storage. The system can be transported in standard 20-foot containers.

Below are the Specifications for the Drilling Rig Components:

Depth Capacity Coring (Wireline or Conventional)

• HMQ Wireline 1200 m
• DLS Wireline 800 m

Hoisting Capacity

Main

• Capacity: Single Line-Bare Drum 17,500 lb (7955 kg)
• Double Line-Bare Drum 35,000 lb (15,900 kg)
• Line Speeds: Bare Drum 132 ft/min (40 m/min)
• Cable Size: 110 ft (33.6 m) X 3/4 in (19.0 mm)

Wireline

• Capacity: Single Line-Bare Drum 2,500 lb (1,136 kg)
• Single Line-Full Drum 840 lb (382 kg)
• Line Speed: Bare Drum 390 ft/min (119 m/min)
• Line Speed: Full Drum 1,260 ft/min (984 m/min)
• Cable Size: 4000 ft (975 m) X 1/4 in (6.3 mm)

Feed System

• Feed Travel: 11.5 ft (3.5m)
• Feed Speeds: Fast and Slow with Variable control
• Thrust: 15,000 lb (6800 kg)
• Pull: 30,000 lb (13,600 kg)

Power Unit

• Mfg: 1 each Cummins
• Power: 175 hp (196 KW)
• RPM: 1,800
• Engine Type: 6 cyl. Diesel Turbocharged/after cooled c/w clutch
• Cooling: Water

Hydraulic System

• Primary Pump: 3,500 psi - 45.6 gpm (24.3 MPa - 173 lpm)
• Secondary Pump: 1,500 psi - 12.5 gpm (10.3 MPa - 47.3 lpm)
• Auxilary Pump: 3,000 psi - 13.4 gpm (20.8 MPa - 50.7 lpm)

Drillhead and Spindle Speeds

• Power: Hydraulic Motor - Variable speed/reversible
• Final Drive: HV Chain drive in oil bath - 2.5 ratio
• Spindle: 4-5/8 in (117 mm)
• Spindle Speeds:

Gear    Ratio      Speed (rpm)    Torque, ft lb (nm)

1st       6.63:1    130-195          3,2232-2,218 (4,382-3,007)

2nd      3.17:1    270-410         1,545-1,060 (2,095-1,437)

3rd      1.72:1    500-756          839-575 (1,138-780)

4th      1.00:1    867-1,300       468-335 (662-454)

• Speed Control: Manual Control from Operator's Station
• Hinged Head: Swing Away

Chuck Assembly

• Type: Hydraulic Open, Spring Closed
• Maximum Inside Diameter: 4-5/8 in (117 mm)
• Holding Capacity: 40,000 lb (18,181 kg)

Weight

• Rig Weight: 14,000 lb (6,363 kg)
• Recommended Truck GVW: 32,000 lbs (14,545 kg)

Standard Equipment

• Dump Mast
• Derrick in Two Sections
• Wireline Speed Control
• Foot Clamp 4-5/8 in (117 mm)
• Hydraulic Slide Control Panel
• Hydraulic Rod Centralizer
• Hydraulic Oil Reservoir Fill Pump and Filtration
• Additional Fuel Filter and Water Separator
• Four Hydraulic Jacks 24 in Stroke

Mud Pump Hydraulic Driven - Standard Equipment

• Type: FMC L11 22D
• Max Flow: 72 gpm (272 lpm)
• Max. Pressure: 1000 psi (7 MPa) F

Control Console

• Electronic Control for all coring functions
• Skid mounted for rig floor placement
• Enclosed air-conditioned doghouse

Support Equipment

• Shop Container
  • Hand and Power Tools
  • Hydraulic Hose Crimper
  • Lighting and power distribution
• Parts Container with Inventory
• 2,000 gallon (7,600 liter) batch cementing unit, hydraulically driven

Instrumentation

• Digital display and recording
• Wireline counter, rate and weight indicator
• Hook load and weight on bit indicator
• Rotation speed
• Mud pump pressure and rate
• Hydraulic feed pressure
• Drill head position and feed rate

Accessories

• Cavins model C air slips
• Eckels 4.5 in (11.43 cm) hydraulic tubing tongs
• Hydraulic power for remote 12 HP mud mixer available