Replaceable electrical device for drilling tool

Details Replaceable electrical device for drilling tool Replaceable electrical device for drilling tool

H - Electricity

01

M

H01M 2/10 (2006.01) E21B 41/00 (2006.01) H02J 7/00 (2006.01)

Patent

CA 2618944

A replaceable battery pack for a downhole tool in a wellbore comprises a housing adapted to be insertably extractable in a cavity on an external surface of the downhole tool. The housing is sized to fit substantially flush with a substantially uniform outer diameter of the downhole tool and is adapted to be extracted from the downhole tool without further disassembling the downhole tool. An electrical power cell is disposed in the housing. An electrical system is disposed in the downhole tool disengageably engaged to the replaceable battery pack for receiving power from the replaceable battery pack. A seal is disposed in a groove in the housing. The seal acts cooperatively with the housing and a surface of the cavity to capture a volume at atmospheric pressure thereby forming a pressure lock when exposed to a downhole pressure. The pressure lock acts to hold the housing in the cavity.

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