Making losses even worse due to the surge of opening a circulating sub

Dear colleagues

(See also the Discussion on 'Pumping LCM through a BHA'; http://my-spread.com/discussions/1490)

At this week's DWOP we were discussing the use of fibrous material to cure losses and/or assist with hole-cleaning.  Whilst discussing the potential to block the BHA (an onshore test  is planned), a traditional contingency is to include a circulating sub in the string.

However, a few of the delegates expressed concern about the possibility of the pressure (when the sub is opened by pressurising up on a dropped ball) inducing or worsening losses.

Additional concerns were expressed about the temperature rating of these tools (our sttain BHT is 152°C).

Please could members share with us their experience in this area.

Many thanks

Dave

5 Answer(s)

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