Abstract: A flex joint is disclosed for connecting two cylindrical instrument housings of a downhole instrument assembly that will bend as required to allow the instrument housings to move through a curved section of a well bore. The joint includes spaced tubular connectors for connecting the joint to the cylindrical housings. The connectors are connected by a flexible cable or thin walled cylindrical tube. One or more helical springs extend between the connectors and are held in compression to urge the connectors toward an in-line position while allowing the joint to bend as required for the cylindrical instrument housings to travel through a curved section of a well bore.

Abstract: A bottom hole assembly for use with coil tubing for drilling, comprising a mud motor having a housing that is bent at its lower end, an output shaft extending through the bent housing, a drill bit connected to the output shaft to be rotated as drilling mud is pumped through the mud motor, a rotator having a torque tube that is connected to the housing of the mud motor to allow the rotator to rotate the housing of the mud motor to change the orientation of the bent section of the housing as required to drill in the desired direction, a steering tool having a housing connected to the housing of the rotator and a central mandrel that is connected to the torque tube of the rotator so that the sensors of the steering tool will be rotated by the rotator the same angular distance as the bent housing so that the orientation of the sensors in the steering tool and the bent housing is always the same.