The MeBo wireline drilling system T. Freudenthal

ISAES 2011 workshop Antarctic Shallow Drilling T. Freudenthal, MeBo wireline drilling system

The MeBo wireline drilling system

T. Freudenthal

Foto: V. Diekamp


JOIDES Resolution „Vidar Viking“

„Chikyu“


Sampling the sea floor from standart research vessels


Drill ship

Gravity core

soft sediment

hard rock

sampling depth

availabi- lity

suitable suitable 102-103m poor

suitable not

suitable 100-101m good

Sea floor drill rig

suitable suitable 101-102m good

Bridging the gap…


Examples for Robotic drills

3-m rockdrill University of

Washington, 1990 20 m BMS

Williamson, 1996

15-m rockdrill BGS, 2007

100 m PROD BGT, 1997

ROV Drill Perry Slingsby


•  Drilling depth 70 m •  Coring of soft

sediments and hard rocks

•  Core diameter 55 – 84 mm

•  Deployment depth 0 – 2000 m

•  MeBo weight about 10 tonnes

•  Total system weight about 75 tonnes

•  Transport within six 20‘ containers

MeBo specifications


•  Umbilical is used to lower the drill rig to the sea floor

•  Umbilical is used for energy supply and remote control from the vessel

•  Transport of the System within 20‘ shipping containers, that are mounted on the working deck of the research vessel

WorkTools

MeBo

Floats

Umbilical

Winch

Block

WorkToolsWinch

Block

a)

b)

MeBo

Control

Control

WorkToolsWinch

Block

a)

b)

MeBo

Control

Control

Control: Control container Tools: Storage container for drill tools Work: Workshop and spare parts Winch: Winch with umbilical in 20‘ transport container frame

Concept of MeBo


Concept of MeBo

•  Mast, drill head and flush water pump form the central drilling unit

•  Drill rig has access to drilling tools stored within two magazines

•  The drill string is built up and down using a loading arm and two chucks

•  Stability on the sea floor is increased by movable legs


Concept of MeBo



McGinnis (2003): Feasibility Study for Remotely Operated Seafloor Drilling Equipment for the US Scientific Community

Wire-line drilling


Advantages of wire-line drilling

GeoB14414-1


GeoB 11807

(conventional) (wire-line)

Data: T. Goldhammer (unpubl.)

Data: N. Riedinger (unpubl.)

Advantages of wire-line drilling


MeBo 2004/2005

(HBFG)

Wire-line 2007/2008

(HBFG)

Pressure Core Barrel 2008-2011

(BMBF, SUGAR)

Borehole Logging (2010)

Cooperations: Prakla Bohrtechnik Bauer Schilling Robotics NSW, STA …

Prakla Seyferle

Corsyde Prakla Bohrtechnik TU Clausthal

Antares GFZ LIAG


METEOR August 2005

April 2008 June 2009

March 2011

MARIA S. MERIAN March 2007 June 2010

CELTIC EXPLORER December 2005 July 2006 August 2008

MeBo Expeditions SONNE November 2010


Deployment statistics 2005-2011

Total •  10 expeditions •  68 deployments between 10 and 1720 m water

depth •  1026 m drilled in cristalline and sedimentary hard

rocks, gravel, sand, till and hemipelagic mud •  643 m core recovered

Wire-line (since 2008) •  6 expeditions •  42 deployments •  752 m drilled / 660 m cored •  500 m core recovered


Results Hard rock drilling


Results Gas hydrates


Wire line drilling MDP (MeBo Druck Probennehmer)

First trials during M84/2 in the Black Sea in March 2011


Results Glacial till


S. Krastel et al., 2011

Results Correlation of core data with geophysical units


Results Correlation of core data with geophysical units

S. Krastel et al., 2011


Results

GeoB13860 6P-2A

GeoB15016-1


Results SO211 – MeBo deployment statistics Number of depl.: 5 Depl. time: 148h35min Total drilling: 271m Core recovery: 245m* *liner length, gaps due to core expansion included


GeoB15016

0,1

0,4

0,7

1,0

1,3

1,6

0 10 20 30 40 50 60

depth (mcd)

Ratio

Fe/

Ca

Fe/Ca 15016-2Fe/Ca 15016-1

15005

Results SO211 – Double hole drilling

G. Martinez, unpubl.


GeoB15016

7,40 9,75 12,10 14,45 16,80 19,15

8,00 10,35 12,70 15,05 17,40 19,75

0,1

0,4

0,7

1,0

1,3

1,6

7 9 11 13 15 17 19

depth (mcd)

Ratio

Fe/

Ca

Fe/Ca 15016-2Fe/Ca 15016-1Drilling depth 15016-1Drilling depth 15016-2h1-d3h1-d4...h2-d3h2-d4...h1-d5h1-d6h2-d1h2-d2h2-d5h2-d6h2-d7h1-d2h1-d1h2-d8h2-d9h2-d10h2-d11h2-d12h2-d13h2-d14h2-d15h2-d16h2-d17h2-d18h2-d19h2-d20h2-d21h2-d22h2-d23h2-d24h1-d7h1-d8h1-d9h1-d10h1-d11h1-d12h1-d13h1-d14h1-d15h1-d16h1-d17h1-d18h1-d19h1-d20h1-d21h1-d22h1-d23h1-d2415005


G. Martinez, unpubl.




Jochem Kück, GFZ Potsdam: Application of memory bore hole logging for lake drilling within ICDP

In situ measurements Bore hole logging


SGR Results: SO211 Spectrum Gamma Ray bore hole logging

Autonomous probe, logging while tripping

GeoB15014: 0-9m: coarse sand with phosphorite concretions 9-16m: fine sand

GeoB15016: 0-56m: silty mud

GeoB15020: 0-71m: silty mud


Future Plans: Bore hole instrumentation


Advantages of sea bed drill rigs

•  Stable platform – optimal drill bit control

•  No need for drill pipe through the water column

•  Operation from multipurpose research

vessels

Seabed Rig AS


Perspectives for drilling depth Limitation: Rig power, magazine capacity,

Drill tool size, continuous sampling, weight…

•  MeBo: 75 m / HQ (63 mm) •  PROD: 125 m / B (44 mm) •  DWACS: 100 m (up to 150 m) / HQ (up to PQ) •  GREGG Sea floor drilling system: up to 150 m /

NQ to PQ •  ROVdrill3: 90 m (expandable to 200 m) / PQ (73

mm)


Source: NIOT, India

Sampling Depth: 100 m with 63 mm core diameter (expandable to 150 m) Dimensions: 12 t (air), H 5.7 m X W 3.2 m x L 8.1 m

Deep Water Automated Coring System DWACS (Williamson and Associates, Seattle)


Source: Seafloor Geoservices

Suction caisson for soft soils

Self leveling legs for hard rock

Sampling Depth: 90 m with 73 mm core diameter

Requirements: A- Frame 60 t SWL for SS6 plus 150 hp ROV


•  hight of magazines and mast has to be increased by 2.4 m (total system hight about 9 m

•  Statics of frame/legs and of the launch and recovery system have to be re-engineered

a 200 m drill

•  Hydraulics, telemetry, control and energy system of MeBo are suitable for 200 m drill

00 MeBo2 •  200 m drilling depth can be reached

by doubling of the stroke length and increasing number of slots from 32 to 40


Summary

Foto: V. Diekamp

•  Sea floor drill rigs are a cost effective alternative when shallow drillings are required

•  Transportable system like the MeBo can be operated world wide on vessels of opportunity

•  Drilling from a stable platform at the sea bed is prerequisite for high quality cores

•  Wire line drilling technology has severe advantages compared to conventional drilling with respect to time and core quality

•  In situ measurements in the logging while tripping mode are possible

•  Sea bed drill rigs can provide a cheaper opportunity for the installation of bore hole monitoring observatories

Documents

The MeBo wireline drilling system T. Freudenthal