Schlumberger Technology Corporation

Alain P Pottier

James J Walulik

Pierre Chesnel

Ralph L Simmons

Bernard Chaintreau

Connector assembly for use in a fluid medium comprising a male connector with a cylindrical pin with several axially spaced contact elements, and a female connector with a tubular housing and axially spaced annular contacts secured inside the housing. Seals with a flexible central portion are alternated with the contacts and with the latter define a bore to accommodate the pin. A chamber filled with dielectric liquid is defined within the housing as a rear extension of the bore, the entry of which is closed to external fluid by a sealing member. A free space is left around the flexible portion of each tubular seal, and each of said spaces communicates with the aforementioned chamber. Means are provided by which the pressure increases in the chamber when the pin is inserted. The pressure rise in the spaces around the seals increases the pressure force of the seals against the pin.

Wet electrical connector

Method for displacing a logging tool through a non-gravity descent portion of a well such as a highly deviated portion, comprising the steps of providing a logging tool at the lower end of a drill pipe as an exposed extension to said drill pipe, displacing the tool thus exposed through said portion of the well by connecting additional sections of drill pipe and lowering the drill pipe, and, during this displacing step, continuously generating and sending uphole a signal indicative of the compressive load undergone by the tool.

Method and apparatus for displacing logging tools in deviated wells

Electrical connector assembly comprising a male and a female connector, each having a group of electrical contacts. The bore formed in the female connector to accommodate the male connector is sealed by a slidable shuttle and is filled with a dielectric liquid when the male connector is not inserted. The shuttle is subjected to a force which tends to keep it in sealing position, and is pushed towards the interior of the bore against the action of said force when the male connector is inserted. The shuttle and the end of the male connector are arranged so that the insertion of the latter brings about a positive connection between the two. This connection remains effective during withdrawal of the male connector, until the shuttle reaches its sealing position.

Repeatedly operable electrical wet connector

The apparatus comprises an elongated support (22) having a series of flat-faced portions and explosive charges (23) mounted perpendicular to the flat faces. Detonating cords are connected to the charges to fire them. Each portion of the support has two closely spaced attachment holes adapted to receive respectively the rear parts of the two charges mounted in opposite directions on each face of this section. The support is made up of a tube flattened transversely so as to form the flat-faced portions. Spacers are disposed between the charges and the support for casings of large diameter. The cases of the charges comprise a cover made of ceramic material and an extruded steel body which tends to flare out when the explosive is detonated rather than being broken into pieces.

Well perforating apparatus

The apparatus comprises an elongated support (22) having a series of flat-faced sections and explosive charges (23) mounted perpendicular to the flat faces. Detonating cords are connected to the charges to fire them. Each section of the support has two closely spaced attachment holes adapted to receive respectively the rear parts of the two charges mounted in opposite directions on each face of this section. The support is made up of a tube flattened transversely so as to form the flat-faced sections. Spacers are disposed between the charges and the support for casings of large diameter. The cases of the charges comprise a cover made of ceramic material and an extruded steel body which tends to flare out when the explosive is detonated rather than being broken into pieces.

Growing community of inventors

Houston, TX, United States of America

Alain P Pottier