Deployment Monitoring&

Drill Logging (offline) at PoleKurt Woschnagg

IceCube collaboration meeting, Berkeley, March 2005

Drill logging in 04/05 season• The plan

– Monitor drilling, hole quality– Produce hole profile for string geometry

• What was done– Drill data transferred to public disk in 5 min chunks– Real-time logging analysis in North…

• Bob Morse, Varun Gopalakrishna at UW (Bob’s talk)• Jack Ambuel, Bruce Koci, others• Example: hole profile (x, y)

– …and at Pole• Cindy Mackenzie: data transfer• KW: logging, analysis• Communication: web, email, phone• Example 1: web based drill depth/speed info (Steffen Richter)• Example 2: caliper data for final go

– Logging and analysis scripts run in both places

Some more about

Hole profile (x, y) for geometry

From the archives: Actual plot used in final go/no-go decision

Drilling (down)

Ream (up)

hole

dia

met

er [

cm]

hole

dia

met

er [

cm]

depth [m]

depth [m]

Suggestions for Next Season

• Faster codes (perl instead of java)• Integrate into drill monitoring• …also keep independent

– Crucial for cross-checks

• Define standard plots• Define procedure & plots for hole hand-over• Bob M to Pole!

Deployment Monitoring

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59

dust logger

Paro2 (pressure, temp)

Paro1 (pressure, temp)

29Keller (pressure)Thermistor (temp)

Thermistors (temp)not read out during deployment

39

47

55

Readout (Data Deployment Box):Jack Ambuel, PSL

Monitoring system (chucknet):Chuck Rentmeesters, UW

Cables/breakouts/connectors:Jim Baccus, UWHarold Mattison, PSL

Sensors:Michael Solarz, UCB

Pole support:Mark ThomaSteffen Richter

Data transfer:Cindy Mackenzie, UW

2435.8 m

Project Phase TransitionManagement-

densePhysics

dominated

Water Compressibility Correction

The compressibility of pure water is tiny,

κ0 = 3.4456e-6 (PSI)-1

but not negligible in a 2500 m hole!

Slightly higher for aerated water.

Use depth difference between Parosto fit effective compressibility:

κ = 3.78e-6 (PSI)-1

Then (after integration):

depth[m] = C/(Dκ)·(exp(- κP0)-exp(- κP))

P,P0 in PSI D = 0.99987 g/cm3; C = 0.7030696

Not implemented in monitoring system, so final depth is 2435.8 m (not 2450.8)

Deployment Monitoring

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39

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Monitored during deployment:Depth (bottom DOM) from pressure sensors - Paro1 - Paro2 - Keller

Pressure differences - Paro2-Paro1 - Paro2-Keller - Paro1-Keller

Payout

Drop speed

Well depth (by hand, with laser ranger)

Monitored during freeze-in:Pressures (x3)Temperatures (x3)

deployment

drop

Density of oil column changes with temperature

Pressure build-up when hole closed off at OM – pressure release when water breaks through

A typical Paro pressure profile in AMANDA

Water frozen at Paro -Oil column volume fixed

Freeze-in begins

Total pressure release corresponds to change in density between water and ice

Freeze-in Monitoring

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59Paro2 (pressure, temp)

Paro1 (pressure, temp)

29Keller (pressure)Thermistor (temp)

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47

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