Abstract: A sampling tool for immersion into a well for collection of samples of oil, gas or water during drilling for production includes a tubular, hollow and preferably cylindrical member with two chambers separated by a compressible pipe. An outer pipe is formed as a cylindrical member to withstand a reservoir pressure. Inside the outer pipe is positioned a unit forming a gas tight storage chamber for the gas-/liquid samples and a chamber for a counter pressure medium. The pipe is pressed against the inside of a U-profile. During sampling, the volume of the storage chamber will increase and the volume of the other chamber will be reduced corresponding to the increase of the storage chamber. Total separation of the gas-/liquid sample from the counter pressure medium is obtained by applying a diffusion tight flexible pipe, and the gas-/light sample analyzed will thus be representative of the reservoir gas-/liquid sampled.

Abstract: A hydraulically operated underreamer or reamer for enlargement of boreholes is to be connected to a rotating drill string. An outer movable cylinder extends the entire length of the reamer for protection of inner parts thereof. Cutter support arms are movable rectilinearly between an operative state whereat they extend from the cylinder and a closed state whereat they are completely retracted within the cylinder. Cutters are mounted on the support arms and are rectilinearly movable with support arms through openings in the cylinder.

Abstract: A bottle or container includes two semispherical parts which are fixed to each other and are equipped with valves at each end. The bottle can have an inner metal lining and a semispherical membrane which presses against the one part of the lining and has a flange welded between the two parts of the lining. The metal lining with membrane and end pieces forms a replaceable unit. By sampling, the bottle first is filled with a counter pressure medium, for example water, until the membrane lies tightly against one half of the bottle. The bottle is then filled with the fluid/gas-sample such that the membrane reverses as water is pressed out and the sample flows in. The membrane will reverse until it presses against the opposite hemisphere, and the bottle thereby is filled with fluid/gas sample.

Abstract: A shell and tube heat exchanger includes a central pipe situated in the shell and provided with a number of individually adjustable baffles. An entire bundle of tubes is built around the central pipe. The baffles are movable with respect to the central pipe by means of a pull-push rod positioned in the central pipe.