CONCRETE DRILLING PROBLEMS

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03172A000300050004-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 22, 2016
• Document Release Date: April 10, 2012
• Sequence Number: 4
• Publication Date: June 10, 1955
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2012/04/10: CIA-RDP78-03172A000300050004-1
'll-June 1955
MEMORANDUM FOR: THE RECORD
SUBJECT . Concrete Drilling Problem
1. Time and Place of Meeting: The meeting was held in Room
2106, Barton Hall, on 10 3une 1955.
2. Attendance:
- TSS/CD
- TSS/CD
- TSS/ED
- TSS/ED
- TSS/TSL
- TSS/ASD
- TSS/ASD
- TSS/ASD
- TSS/APD
3. Purpose of Meeting:I arranged the meeting so that 25X1
each division could present what information they had obned relating
to the concrete drilling problem; what ideas were being considered or
being worked on, and some of the problems involved.
4. Discussion:
a. TSS/ED, related that they were continuing their 25X1
work on the pipe pusher project and utilizing the information
received by APD from NBS about diamond core drills. This information
has also been given to one of their contractors, who will conduct
noise and drilling tests on diamond core drills.
b. TSS/APD, reported that the outlook for an 25X1
ultra sonic drill for concrete drilling did not look too feasible,
based on information received from NBS and certain contractors. APD,
however, has obtained some information on an ultra sonic gauge which
appears practicable for the measurement of the thickness of cement
walls. This instrument would give relative measurements inStpaA of
absolute measurements.._NBS has shown interest in testing an instrument
of tt s type.
c. SL, discussed the possibility of using drilling
muds as a u er in cement drilling. Their purpose would be two-fold -
to act as a lubricant and to deduce the grinding and vibration noise
of the drilling operation. His department was also considering the
ideas brought forth by the other divisions, plus the use of some sort
of a fluid coupling device. Q_ 86 3 _
DOC __ REV DATE ii Y ~d sY
ORIG cep P OPI TYPE _c55/Q
0RfG ST CLASS ~Z PAGES - -- PV CLASS
JU
NEXT REV AUTH: HR ~n~
Declassified in Part - Sanitized Copy Approved for Release 2012/04/10: CIA-RDP78-03172A000300050004-1
 Declassified in Part - Sanitized Copy Approved for Release 2012/04/10: CIA-RDP78-03172A000300050004-1
d. TSS/ED, suggested the use of a pin up gun 25X1
to fire a rod into the wall, which in turn, could be easily removed.
He also suggested the use of a shaped charge of aluminum and plaster
of Paris in cube form. It is now used to cut steel and might be
useable against cement in that the heat released would calcinate
the cement and the explosive force, directed in the horizontal
direction, would remove the cement.
e. TSS/CD, reported on the use of an aluminum 25X1
torch to calcinate cement, making it easier to drill. He also reported
on the use of certain inorganic chemicals. These chemicals,
(NaCO and other inorganic combinations) when applied to cement and
heated, cause the cement to either swell and break apart or to
crumble or disintegrate.
f. TSS/CD, reported that he is working on the 25X1
problem of wall measurement by the use of backscpttering of gamma
rays.
g. TSS/ASD, reviewed the problem and related
past field operations to it.
h. TSS/OPS had requested that samples of various walls be sent
in from the field and some are now arriving. It is believed that
they will be located at
5. Actions: It was decided that the next meeting would be at 1100,
29 June 1955 in room 2106, Barton Hall. It was requested that all
divisions again report on their progress and problems.
TSS APD
Distribution:
Orig. -,Ad Hoc #25
1 -
1 -
Declassified in Part - Sanitized Copy Approved for Release 2012/04/10: CIA-RDP78-03172A000300050004-1