A directional drilling system that includes a drill bit capable of drilling a bore through rock. A shaft couples to the drill bit. The shaft transfers rotational power from a motor to the drill bit. A steering system controls a drilling direction of the drill bit. The steering system includes a sleeve coupled to the shaft. A steering pad couples to the sleeve. The steering pad forms a steering angle with the drill bit. Axial movement of the steering pad with respect to the drill bit changes the drilling direction by changing the steering angle.

An apparatus for reducing torque in a drill string includes a clamp assembly having a first clamp segment and a second clamp segment, the first and second clamp segments each being generally arcuate and configured to connect together so as to secure the clamp assembly around an oilfield tubular and prevent the clamp assembly from axial and rotational movement relative to the oilfield tubular. The first and second clamp segments each include a first extension and a second extension, each of the first and second extensions having a tapered end that decreases in outer diameter as proceeding in an axial direction, so as to provide a conical guide surface. An outer sleeve is positioned around the clamp assembly, is configured to rotate with respect to the oilfield tubular and the clamp assembly, and is prevented from axial movement relative thereto.

A spin-through drive rod centralizer consisting of a stator constructed of plastic, or other appropriate material, which is mounted on a rotor attached to the body of the drive rod, which provides the bearing surface for rotation of the rotor within the stator. The stator is equipped with multiple vanes which extend to the full internal diameter of the production tubing. In one configuration, the radially oriented vanes have cut-outs which allow the tip of the vane to compress inward, allowing passage through tight spots in the tubing, then rebounding to the full ID of the tubing. In another configuration, the vanes are tangentially attached to the stator body, such that they bend in a circumferential direction to allow passage through tubing tight spots, then rebound to full tubing ID.

Presented herein are apparatus and methods that alleviate incidence of stuck pipes in downhole environments. In some embodiments, the apparatus and methods described herein include a drill pipe for drilling operations including: a dissolvable layer deposited on a portion of an outer surface of the drill pipe; and a tunnel connected to the dissolvable layer.

A debris removal system includes: a drill pipe disposed within a borehole including a threaded portion disposed longitudinally above a bottom hole assembly (BHA). The threaded portion includes at least one spiral notch that wraps around the drill pipe. An outer diameter of the threaded portion of the drill pipe remains constant throughout a longitudinal length of the threaded portion.

A drill pipe for drilling operations includes: a dissolvable layer deposited on a portion of an outer surface of the drill pipe; and a tunnel connected to the dissolvable layer.

A float equipment attachment assembly includes a float equipment for mounting to a tubing string. The float equipment includes a tubular body and a plurality of gripping arms extending longitudinally away from the tubular body arranged to deflect radially inwards. An attachment sleeve has an inner diameter tapered to form a conical abutment portion. The attachment sleeve and float equipment are arranged axially around the tubing string and are pressed together. The gripping arms are deflected radially inward by the conical abutment portion to grip the tubing string to mount the float equipment to the tubing string.

A downhole tool, comprising: a mandrel having first and second opposing ends and an outer mounting surface, the first end comprising a male threaded portion; a tool component mountable on the mounting surface by sliding said tool component onto the mounting surface from the first end of the mandrel; and a load sleeve defining a torque shoulder, wherein the load sleeve is mountable on the mandrel and securable adjacent the male threaded portion of the first end of the mandrel such that the torque shoulder and the male threaded portion define a pin connector to facilitate connection with a box connector of a separate component.

A rotary dynamic system includes: a drill pipe; a bearing coupled at a first axial end to the drill pipe; and an outer sleeve coupled to a second axial end of the bearing. The outer sleeve rotates independently of the drill pipe.

Apparatus and methods for running casing into a wellbore. An apparatus may be or include a casing collar configured to couple together a first casing joint and a second casing joint. The casing collar may have a body and a plurality of rotatable members connected to the body. The body may have a fluid passage extending axially therethrough, a first coupler configured to couple the casing collar with the first casing joint, and a second coupler configured to couple the casing collar with the second casing joint. At least a portion of each rotatable member may extend from the body in a radially outward direction.