Design on electrical connectors of cable transmission in intelligent wells

Cable transmission has its intrinsic advantages and it is the development tendency of intelligent drilling among all kinds of signal transmission.The circuit is required to be automatically switched on electricity as the pin end and box end of drillpipes are screwed together.A specially designed electrical connector must be fixed on each end of the cable to carry out the function.Based on analyzing various overseas designs of electrical connectors and their working conditions,the redesigns a new type electrical connector.The structure of helcial spring of cylindrical compression is adopted,which prolongs its service life,reduces its contact resistance,and improves its sealing capacity.Lip structure is designed at the end of the sealing components,making the electrical connector has self-cleaning function.This newly designed electrical connector makes full use of the contact space of the pin end and box end of drillpipes and reduces the energy consumption of drilling fluid circulation.It also has the functions of simple structure,better sealing property,automatic compensation,automatic cleaning capability,absorbing vibration,and anti-torsional capacity,etc.,What’s more,it has no special requirement on the types of drillpipes connectors and the drill operating parameters.The new design promotes the development of cable transmission technology to a certain extent.