[dennisw]

They are at the near bottom of the well. Testing the casing integrity at this point has little meaning.>>>>>>>>>>

How about 2-3000 feet ago? It was very useful then. If this well/reservoir is super high pressure the relief wells will need a lot of luck. It will be like you trying to stop a firehose with your hand

[thackney]

Look at the graphic I posted above. Click on the picture for a more detailed view.

2~3,000 feet shallower it was no where near the original bore.

[thackney]

http://www.bp.com/liveassets/bp_internet/globalbp/globalbp_uk_english/incident_response/STAGING/local_assets/downloads_pdfs/Kent_wells_technical_briefing_press_call_slides_28062010.pdf

The link above will help explain how the relief wells get close. But even when they got down to 20, even 5 foot of separation, they are still separated by 20~5 feet of rock. There is no way to test the integrity of the original casing at that point. Magnetic sensors are used to detect the casing and used to help with the steering, but it doesn't give pressure, flow or any data like that.

This following is the transcript that went with the above slide show presentation on June 28th.

http://www.bp.com/liveassets/bp_internet/globalbp/globalbp_uk_english/incident_response/STAGING/local_assets/downloads_pdfs/kent_wells_briefing_06_28_2010.pdf