Abstract: A sealing member for use in well shafts. The sealing member comprises a hose which is mounted over a tube sleeve and is sealed at its ends relative thereto. At least one pipe carrying pressurized water passes through the sleeve.The pressurized water pipe is connected with a space between the sleeve and the hose, and the connection means includes a valve arranged to allow water to flow from the pressurized water pipe to the space but not in the opposite direction. Through this arrangement the pressurized water inside the space between the hose and the sleeve keeps the hose in sealing engagement against the wall of the well shaft.

Abstract: A cap intended to close the upper end of a well casing arranged in a well opening. The closing cap is provided with upright sleeves for passage therethrough of tubes, pipes, and the like from the well pump. An annular shoulder is formed on the internal wall of the cap, allowing the cap to be mounted in a sealing position on well casings with different dimensions. Tapering sections on the upper edges of the sleeves provide for automatic sealing-off of the sleeves around its associated tube etc.

Abstract: A coupling arrangement to removably interconnect pipes in a well, below ground level. The coupling comprises a head with a lateral connecting branch intended to sealingly engage a seat formed on the water pipe leading to the pump. An actuating rod with an eccentric thereon is rotatably mounted on said coupling head, said eccentric is arranged, when turned in one direction by the rod to displace said coupling head laterally until the connecting branch thereon engages in said seat, and when turned in the opposite direction, to effect disengagement between said seat and said connecting branch on said coupling head.