bottom-hole assembly

bottom-hole assembly

[′bäd·əm ¦hōl ə‚sem·blē]
(petroleum engineering)
That portion of the drilling assembly that extends beyond the drill pipe.
References in periodicals archive ?
Currently picking up bottom-hole assembly, including log while drilling equipment ("LWD"), to drill ahead.
Subsequent fishing operations recovered all of the string except the bottom-hole assembly.
part of the bottom-hole assembly near the bit and recorded information as the
A wireline system will cost from $75,000 to $125,000, depending on the outside diameter size of the non-magnetic bottom-hole assembly and type of probe.
Tensor wireline steering tools distributed by Inrock are priced at just over $40,000, excluding non-magnetic bottom-hole assembly.
Gammaloy and Marlex rent and lease non-magnetic drill collars and other downhole tools used within the bottom-hole assembly, and provide manufacturing and support services for various downhole tools requiring high-precision machining.
During the drill-out procedure, the bottom-hole assembly became stuck, the tubing was cut near the top of the stuck portion (the "fish") and the coiled tubing unit was moved off location.
Currently we are working to free the bottom-hole assembly prior to drilling ahead.
The operation at 06:00 hours (Central Australian Time) today was building mud volume and laying out the bottom-hole assembly prior to wire-line logging, which will be carried out later today.
Having successfully commenced drilling the build-up section of the well, and having penetrated what appears to be a significant fracture in the reservoir, Weatherford encountered repeated problems with the bottom-hole assembly ("BHA") which ultimately resulted in the BHA detaching and being left in the hole.