... Abstract Combined with actual air drilling practices and data in western China, mechanical behavior of three different BHA used in actual air drilling was investigated. Bit side force and bit tilt angle of those three BHA both in air drilling and mud drilling were calculated and compared...

... Abstract This paper presents a new Flexible Bottomhole Assembly (BHA), which is classified as a coupled driven drilling BHA of the power anti-deviation, with the technical superiority of anti-deviation and high ROP. The coupled driven drilling has simultaneously two driving powers: one is from...

.... P. 223 build rate shixi oilfield drilling operation carboniferous formation circulation bha drilling displacement completion technology shale drilling parameter instability drill string stabilizer hole problem bent housing upstream oil & gas trajectory pipe horizontal...

... with the affecting factors and calculating method for the treatment. PF plot method, a new method that is utilized to evaluate effects of deviation control and ROP is also brought forward. In this paper, structural characteristics and control mechanism of a state-of-the-art BHA with an offset axes sub (short in OSAS...

... formula deformation articulated diwnhole motor assembly flexible collar string downhole motor assembly stabilizer building rate requirement knuckle jornt wob design mathematical model spe 29977 bha short radius horizontal drilling INTRODUCTION To meet the increasing demand...

...BHA MODELS It is usually considered that the performance of drill bit action on formation mainly depends on BHA behavior. The BHA consists of drill bit, drill collars, stabilizers and other structural components. While BHA works in three-dimensional (3-D) well with varied curvatures...

... sections. The references have been made to the successful application in a cluster-well engineering, in terms of H50 project, to validate the related methods. collision probability deflection drilling parameter bha orthogonal array directional well wob displacement frequency information...

... ABSTRACT General techniques for designing the bottomhole assembly (BHA) for a medium radius horizontal well are reviewed with emphasis on achieving an integrated drilling system by optimizing bottomhole assembly performance via the proper selection of BHA components. Systems analysis includes...