The invention relates to a drill rod coupling having a sleeve-shaped coupling receptacle, a pin-shaped coupling member which can be inserted axially into the coupling receptacle to form a torque proof connection, and at least one locking bolt which is directed transversely to the axial coupling direction and extends, in a locked coupling position, between the coupling receptacle and the coupling member into a locking recess, wherein the locking bolt is mounted so as to be radially adjustable between an unlocking position and a locking position. Efficient coupling is achieved in that a tensioning device is provided by means of which the locking bolt is pressed into its locking position with a predefined tensioning force, and in that the locking bolt is connected to a resetting member by means of which the locking bolt can be reset into the unlocking position when a resetting force is applied.

A spindle assembly for connecting a drill string to a rotational drive for use in a horizontal directional drilling operation. The assembly comprises a saver sub attached to the rotational drive, and a drive chuck for connection to the drill string. The drive chuck and saver sub form a torque-transmitting connection by engaging through a seat in the saver sub and an engagement point on the drive chuck. Dowel pins may be used to rotationally lock and provide the engagement between the saver sub and the drive chuck. A collar may thread to the saver sub and cause an interference fit by engaging the drive chuck at a shoulder.

A spindle assembly for connecting a drill string to a rotational drive for use in a horizontal directional drilling operation. The assembly comprises a saver sub attached to the rotational drive, and a drive chuck for connection to the drill string. The drive chuck and saver sub form a torque-transmitting connection by engaging through a seat in the saver sub and an engagement point on the drive chuck. Dowel pins may be used to rotationally lock and provide the engagement between the saver sub and the drive chuck. A collar may thread to the saver sub and cause an interference fit by engaging the drive chuck at a shoulder.

An interference apparatus is provided for a motor shaft transmission assembly. The interference apparatus may include split-ring shells and a retaining device. The interference apparatus may be mounted to an intermediate sleeve of the motor shaft transmission assembly. The interference apparatus is configured to prevent the loss of certain motor shaft transmission assembly components downhole in the event of a failure of the motor transmission due to dynamic loads.

A device for transmitting data and/or power from a rotating part, for example a pipe handler, to a non-rotating part, for example a top drive, of a drilling rig or a workover rig has at least one slip ring with at least one sliding contact in contact therewith. The device includes a first ring and a second ring. The first ring and the second ring delimit a closed area. The slip ring(s) and the sliding contact(s) is/are arranged within the closed area.

A device for transmitting data and/or power from a rotating part, for example a pipe handler, to a non-rotating part, for example a top drive, of a drilling rig or a workover rig has at least one slip ring with at least one sliding contact in contact therewith. The device includes a first ring and a second ring. The first ring and the second ring delimit a closed area. The slip ring(s) and the sliding contact(s) is/are arranged within the closed area.

A connection for connecting a first member with a second member, including a torque transmitting connection between the first member and the second member and an axial force transmitting connection between the first member and the second member, wherein the axial force transmitting connection includes a first exterior shoulder on the first member, a second exterior shoulder on the second member, a first collar having a first interior shoulder for engaging with the first exterior shoulder, a second collar having a second interior shoulder for engaging with the second exterior shoulder, and a collar connection between the first collar and the second collar for transmitting an axial force between the first collar and the second collar.

A connection for connecting a first member with a second member, including a torque transmitting connection between the first member and the second member and an axial force transmitting connection between the first member and the second member, wherein the axial force transmitting connection includes a first exterior shoulder on the first member, a second exterior shoulder on the second member, a first collar having a first interior shoulder for engaging with the first exterior shoulder, a second collar having a second interior shoulder for engaging with the second exterior shoulder, and a collar connection between the first collar and the second collar for transmitting an axial force between the first collar and the second collar.

A threaded joint is constructed of a pin and a box, the box having an outside diameter less than 104% of an outside diameter of a tubular body having the pin. The box includes, in order from an end of the box toward the tubular body: a lip portion and a female threaded portion, the lip portion including a shoulder surface and a sealing surface. The pin includes a shoulder surface, a sealing surface, and a male threaded portion. The lip portion of the box has a nose portion disposed between the shoulder surface and the sealing surface and an annular portion disposed between the sealing surface and the female threaded portion. The nose portion and the annular portion are not in contact with the pin, and a length of the annular portion is longer than a thread pitch of the female threaded portion.

A drive unit of a top drive system includes a drive stem having a plurality of ports from an exterior thereof to an interior thereof. A plurality of sliding coupling members is disposed in the ports. A coupling collar encircles the drive stem and has actuation surfaces and recessed surfaces on an interior thereof, wherein the recessed surfaces align with the ports when the coupling collar is in a first position, and the actuation surfaces align with the ports when the coupling collar is in a second position.