A drill rig having a longitudinal drilling axis, a front portion, and a rear portion can comprise a feedframe aligned with the longitudinal drilling axis, a first head assembly coupled to the feedframe and configured to rotate a drill string, and a rod holder proximate the front portion of the drill rig. A second head assembly can be movable on the feedframe along the longitudinal axis and can include a powered water swivel assembly comprising a spindle having an interior bore a drill rod connector at a first end of the spindle, a motor that is configured to rotate the spindle, a clutch configured to disengage the motor from the spindle, a gearbox that couples the motor to the spindle, and a water swivel that is configured to provide drilling fluid to the interior bore of the spindle.

A washpipe assembly for a rotational device includes a gland assembly, a washpipe positioned within the gland assembly, and a seal assembly positioned about the washpipe within the gland assembly. The seal assembly includes a plurality of ring seals, a plurality of annular chambers positioned between the ring seals along the washpipe, and a pressure manifold fluidly coupled to the plurality of annular chambers. The pressure manifold is configured to receive a first fluid pressure and is configured to apply a plurality of pressures to the annular chambers, and the plurality of pressures are each less than the first fluid pressure.

A washpipe seal and method includes providing a first sliding mechanical face seal between two seal elements to seal a mud conduit, and a second mechanical face seal between two additional seal elements to define a cavity within a housing of the washpipe between the first and second mechanical face seals and independently from the mud conduit, and in which, during operation, a buffer fluid can be provided.

A downhole wellbore treatment system for and a method of treating an inner surface (FT) of a wellbore (W) is provided. The system comprises an elongate conduit (50) such as a flexible hose (50) for conveying treatment fluid from the surface (P; C) to a treatment head (80) adapted to be inserted into the wellbore (W). The treatment head (80) has a nozzle (83) providing an outlet from the conduit (50) for creating a jet of treatment fluid directed at the inner surface (FT) of the wellbore (W). The treatment head (50) is rotationally disconnected from the conduit (50) by a swivel device (70), allowing rotation of the head (50) relative to the conduit (50) during jetting of the treatment fluid. The elongate conduit (50) is reelable (10) and is inserted into the downhole wellbore (W) from a reel (10) at the surface, through a pressure control device (40) containing wellbore pressure within the downhole wellbore (W) during insertion of the elongate conduit (50) from the reel (10).

Amidoamine-based gemini surfactants having dual chains connected via an arylene or heteroarylene linker. Each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. A water-based drilling fluid containing the gemini surfactant is also provided. As examined by linear swelling and free swelling tests, the gemini surfactant is effective in reducing clay swelling.

A rotating joint apparatus includes a first section, a second section, and an interface between the first section and the second section. A bearing at the interface is configured such that the first section is rotatable relative to the second section. A main flow passage extends through the first section and the second section. A signal conductor is accessible, by a first connector on an exterior surface of the first section and, and by a second connector on an exterior surface of the second section. The signal conductor includes a signal transmission assembly at the interface.

For use with a top drive power unit supported for connection with a well string in a well bore to selectively impart longitudinal and/or rotational movement to the well string, a feeder for supplying a pumpable substance such as cement and the like from an external supply source to the interior of the well string in the well bore without first discharging it through the top drive power unit including a mandrel extending through a sleeve which is sealably and rotatably supported thereon for relative rotation between the sleeve and mandrel. The mandrel and sleeve have flow passages for communicating the pumpable substance from an external source to discharge through the sleeve and mandrel and into the interior of the well string below the top drive power unit. The unit can include a packing injection system and novel seal configuration.

For use with a top drive power unit supported for connection with a well string in a well bore to selectively impart longitudinal and/or rotational movement to the well string, a feeder for supplying a pumpable substance such as cement and the like from an external supply source to the interior of the well string in the well bore without first discharging it through the top drive power unit including a mandrel extending through a sleeve which is sealably and rotatably supported thereon for relative rotation between the sleeve and mandrel. The mandrel and sleeve have flow passages for communicating the pumpable substance from an external source to discharge through the sleeve and mandrel and into the interior of the well string below the top drive power unit. The unit can include a packing injection system and novel seal configuration.

A connector system and method, of which the connector system includes a first conduit having a lower coupling and a first alignment feature, and a frame configured to be coupled to an oilfield tubular, and configured to receive the first conduit and a second conduit. The frame includes a second alignment feature configured to mate with the first alignment feature such that the lower coupling is aligned with the second conduit, and the first alignment feature is configured to slide vertically with respect to the second alignment feature such that the lower coupling is brought into engagement with the second conduit while the first and second alignment features are mated together.

A plug and pump system for routing pressurized fluid from a fluid source is disclosed. The system includes a platform and a docking station interface mounted on the platform and including multiple points of articulation. A wellhead interface is mounted on the platform and includes multiple points of articulation. The docking station interface and the wellhead interface are configured to route pressurized fluid from a fluid source.