1 / 7

Lesson Learnt From A Sub-Sea Well Intervention

Lesson Learnt From A Sub-Sea Well Intervention. Lessons Learnt From A North Sea Sub-Sea Well Intervention. Background. 2010 Following a plant shut down the sub-sea well would not restart. Surface tests indicated it was either a failure of a TR-SC-SSSV or the Matrix.

nibaw
Download Presentation

Lesson Learnt From A Sub-Sea Well Intervention

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lesson Learnt From A Sub-Sea Well Intervention

  2. Lessons Learnt From A North Sea Sub-Sea Well Intervention Background. • 2010 Following a plant shut down the sub-sea well would not restart. • Surface tests indicated it was either a failure of a TR-SC-SSSV or the Matrix. • 2011 Sub-Sea Intervention planned with a Light Well Intervention Vessel (LWIV). • The plan was to investigate why the well would not flow. • The well had been drilled by a 3rd party turnkey operation 10 years previously. • No well interventions had been carried out during the interim period. • The well was completed with a sub-sea horizontal tree.

  3. Lessons Learnt From A North Sea Sub-Sea Well Intervention • Learning. • For older sub-sea wells use a resilient AX seal for wellhead to LWIV interface.

  4. Lessons Learnt From A North Sea Sub-Sea Well Intervention Be prepared for the unexpected.

  5. Lessons Learnt From A North Sea Sub-Sea Well Intervention • Unable to pull 2nd Crown Plug. • Normal slickline bailers made no head way. • A Welltec brush had been mobilised to clean the TR-SC-SSSV. • A Weltec Vacuum tool had also been mobilised.

  6. Lessons Learnt From A North Sea Sub-Sea Well Intervention • Rope and propant were recovered from the top of the 2nd Crown Plug. • Drilling Well Reports stated the Crown Plugs had been set on drill pipe.

  7. Lessons Learnt From A North Sea Sub-Sea Well Intervention • Take a Camera. • An Expro camera had been mobilised to check the operability of the TR-SC-SSSV. • Camera had side view option and found a 360 degree tubing indent anomaly. • Photo 1 shows top of flapper in TR-SC-SSSV. • Photo 2 shows debris at top of TR-SC-SSSV internal flapper sleeve. • Photo 3 shows indent anomaly in tubing above TR-SC-SSSV.

More Related