Measuring and testing – Borehole or drilling – Downhole test
Patent
1986-01-16
1988-04-26
Levy, Stewart J.
Measuring and testing
Borehole or drilling
Downhole test
166382, E21B 4700
Patent
active
047396520
ABSTRACT:
The tubing system comprises a number of measuring stops or surfaces arranged in a predetermined mutual spaced relationship. The spacing is utilized for determining the displacements in the material enclosing the tubing. This displacement is ascertained by a measuring probe introduced into the tubing from the outside. The measuring stops are provided on measuring tube unions or coupling sleeves in order to ensure that displacements in the material can also be transmitted to the measuring stops even in relatively soft material without a stiffening effect of the tubing. The connection between the measuring tube unions or coupling sleeves takes place exclusively through a telescope-type protecting tube insert. A rigid anchoring of the measuring tube unions or coupling sleeves to the inner wall of an accommodating hole or bore hole provided in the material to be investigated takes place through filling collars fastened to the outside of the measuring tube unions or coupling sleeves. These filling collars are filled with cement mortar through a first filling conduit and a first return conduit. A support arrangement maintains the exact position of the measuring stops of the measuring tube unions or coupling sleeves relative to each other during the assembly of the measuring tube until the cement mortar has hardened in the filling collars. Centering heads of the support arrangement are connected with the measuring stops by detachable locking pins.
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Amstad Christian
Koppel Jakob
Kovari Kalman
Gesellschaft zur Forderung der industrieorientierten Forschung a
Kleeman Werner W.
Levy Stewart J.
O'Shea Kevin D.
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