This complex arrangement of tools varies considerably depending on requirements, and can stack up to 1, ft long. These are the main drilling, steering, and recording components that, along with the bit itself, do the work of the bottom hole assembly:. Back to Previous Page. The assembly consists of the drill bit with collars that add weight and thus increase the force of the drilling action as well as high tech equipment to monitor the drilling and set the direction of the drill. Contact us today for more information! The bottom hole assembly is thus the key active component of drilling equipment used to create a well.
In such a case the first stabilizer is placed 30—45 feet behind the bit. John Wiley and Sons. Dow Jones published the first stock average. The key structural components of the BHA are as follows:. In the case of jarring up above a stuck bottomhole assembly, the driller slowly pulls up on the drillstring but the BHA does not move. Views Read Edit View history. Drill pipe, HWDP and collars are typically racked back in stands in to the monkeyboard which is a component of the derrick if they are to be run back into the hole again after, say, changing the bit.
BHA - Schlumberger Oilfield Glossary
Bottom hole assembly (BHA) design for directional control
Description: Although a slick assembly is simple and economical, it is difficult to control and maintain the drop tendency. Type 3 uses the drill collars to achieve directional control. Explanation of your recommended changes. The tool joint connections are threaded which allows for the mating of each drill pipe segment to the next segment. Drill Stem Design and Inspection.