Novel Approach to Restore Integrity to Downhole Safety Valves from Damaged Landing

Abstract

Well Integrity management standards require wells to be equipped with two independent barriers to protect against uncontrolled flow of hydrocarbons from the reservoir to the environment. For producing wells the two barriers are usually the downhole safety valve and the surface X-mas tree. I-DHSVC is integral solution, implemented 1st time in region, for wells suffering from damaged DHSV landing nipple profile. Damage could be related to lock profile, seal bore profile or both. It's a perfect solution for the wells with damaged DHSV landing nipple but with integral control line. Sometimes, DHSV cannot be stay in the landing nipple due to damaged lock profile, causing it to pop up during the production. This situation leads to high risk scenario (risk rank-1). IDHSVC does not use damaged nipple profile for anchoring as its slips anchor in the flow coupling above & below the landing nipple. A standard DHSV is connected to bottom of IDHSVC, which sets by either Slick line or by E-wireline utilizing nitrogen charged hydraulic setting tool. DHSV can be operated normally using existing control line. IDHSVC can be retrieved utilizing slick line with GS pulling tool without any Barge/Rig. The benefits from the project are sustained "year-on-year" with the restoration of full integrity to the wells which enables ADMA-OPCO to meet its production targets in a cost effective manner.