Low cost plastic hermetic electrical connectors for high pressure application
AssigneeHalliburton Logging Services, Inc.
InventorThomas E. Ritter
Life of this patent
Estimating the term…
Abstract
A high pressure high temperature hermetically sealed electrical connector pin construction is set forth for use in down hole logging tools. On exposure to 28,000 psi at elevated temperatures, the present apparatus is able to handle such pressure and temperature cycling. Moreover, an elongate pin having two ends for forming electrical connections is used, the pin having a shoulder, a central threaded portion on one side of the shoulder and is formed of conductive metal that joins with a plastic body which is bonded thereto either by in situ molding to the pin or by an epoxy resin and the pin further threads to the body. In a multipin construction, the body is a circular insert for a surrounding cylindrical steel housing.
Claims12
A high pressure hermetically sealed connector comprising:
- (a) plural elongate conductive pins wherein each of said pins has two ends and a central elongate portion wherein the central portion includes an irregular surface means;
- (b) a polymeric body surrounding the central elongate portion of said pins to thereby position the respective ends of said pins exposed for connections in a circuit, and wherein said body secures said pins parallel to each other and said pin ends terminate as two sets of exposed pin ends for connection on opposing sides of said body;
- (c) wherein said body and said pins are bonded at the irregular surface means to prevent leakage along said pins;
- (d) wherein said body has openings therethrough to encircle and fit about and in a surrounding relationship to said pins and said body has an external sealing surface therearound;
- (e) a surrounding housing which contacts against and seals with the external sealing surface of said body wherein said housing is formed of metal and supports a metal wall transverse thereacross and abutting said polymeric body, and said wall enables said body to be registered there against and held in a sealing relationship;
- (f) plural aligned holes in said wall to align each of said pins to enable said pins to extend through said wall so that said pins position one set of ends on one side of said wall and another set of pin ends on the opposite side of said wall;
- a separate insulative sleeve having sufficient length positioned around each of said pins to enable said pins to be electrically insulated from said wall to avoid electrical grounding thereto;
- (h) an O-ring registration shoulder cooperative with an O-ring to permit interconnection in a hermetically sealing fashion between said body and said metal housing;
- and
- (i) wherein said pins provide individual electrically insulated connections through said hermetically sealed housing.
A high pressure hermetically sealed connector comprising:
- (a) an elongate conductive pin having two ends and a central elongate portion thereof which central portion includes an irregular surface means;
- (b) a polymeric body surrounding said central elongate portion of said pin thereby leaving the two ends of said pin exposed for connection in a circuit;
- (c) wherein said body and said irregular surface means of said central elongate portion of said pin are bonded together to prevent leakage along said pin;
- (d) wherein said body snugly fits to said pin and includes an external sealing surface;
- (e) a surrounding metal housing fixedly about said body at said external sealing surface;
- (f) a metal wall having a transverse face extending fully across said housing, said wall enabling said body to be registered and held in a sealing relationship within said housing and against said wall;
- (g) an aligned hole in said wall to align said pin to enable said pin to extend through said wall;
- (h) a separate insulative sleeve about said pin having sufficient length to enable said pin to be electrically insulated from said wall;
- and
- (i) wherein the exposed ends of said pin extend through said wall and are on opposite sides of said walls.
Dependencies are inferred from the claim text.