Application Type
Patent
Application SubType
National
(10) Registration Number and Date
BNN20190051 09.12.2021
Status
Registered
(180) Expiration Date
(20) Filing Number and Date
BN N/2019/0051 13.01.2015
(40) Publication Number and Date
BN N/2019/0051
A
09.12.2021
(86) PCT Filing Number and Date
(87) PCT Publication Number and Date
(85) National Entry Date
(30) Priority Details
BN /2017/0043
13.01.2015
(51) IPC Classes
(74) Representative Name
(EN) AIP Law : Unit Nos. 404A-410A, 4th Floor, Wisma Jaya, Jalan Pemancha, Bandar Seri Begawan BS8811, Brunei Darussalam
(54) Title
(EN) MECHANICAL DOWNHOLE PRESSURE MAINTENANCE SYSTEM
(57) Abstract
(EN)

A method and apparatus that includes an elongated base pipe having an external surface at least partially defining an external region and an internal surface at least partially defining an internal region; and a pressure maintenance device disposed in the base pipe and comprising: a flow path that extends between the internal region and the external region; and a valve having a gas charged chamber, the valve allowing the flow of a fluid from the internal region to the external region through the first flow path when a pressure differential between a pressure associated with the internal region and a pressure associated with the gas charged chamber is less than a maximum pressure threshold and when a pressure differential between the external region and the pressure associated with the gas charged chamber is greater than a minimum pressure threshold.

(58) Citations
Document Type Date Action
Event NameDateStatus
Filing13.01.2015Filed
Registration09.12.2021Registered
Publication09.12.2021Published