A system is provided for injecting coiled tubing (CT) into and out of a wellbore. In embodiments, separate injector and reel units are provided releasing constraints on CT size and length. The injector unit is fit with an extendible mast for handling larger bottom hole assemblies and fit with a rotating gooseneck for accepting CT from alternate arrangements of the reel unit. The mast is reinforced to resist CT loading. The capacity of the reel is maximized for the reel unit transport envelope. The reel is rotated using an offset drive engaging a bounding reel flange, such as engaging drive and bull gears. A generally radial displacement of the drive from the reel permits replacement of the entire reel.

A drilling rig having a detachable, modular cellar arranged beneath a drill floor of the drilling rig. The cellar may be or include a cellar trailer and may be configured to house drilling equipment, such as well head equipment, such as one or more blowout preventers. In some embodiments, the cellar trailer may provide work areas, such that the well head equipment may be prepared, tested, or generally operated within the cellar trailer. The cellar trailer may additionally be configured to provide stiffening support to the drill floor in order to mitigate deflection of the drill floor during drilling operations. The stiffening support may be provided by a shear wall extending from the cellar trailer. The cellar trailer may be towable. The cellar trailer may additionally be skiddable and/or walkable.

The invention is a land drilling rig (10) having a drilling mast (12), a top drive (14) movable in the drilling mast (12) along the vertical axis of the drilling mast (12), and a crown bearing (18) at an upper end (16) of the drilling mast (12), the crown bearing (18) being movable by means of a positioning device (24), and a method of operating such a drilling rig (10) and a method of operating a top drive (14) in the drilling mast (12) of such a drilling rig (10).

A vessel and method to perform subsea wellbore related operations, e.g. slim hole technique drilling of a subsea wellbore are disclosed. The vessel has a hull with at least one moonpool defining first and second moonpool areas. A vertical tower is mounted on a tower supporting hull structure and has a vertical operative face. A hoisting device has a winch and winch driven cable, and is adapted to suspend a load from said vertical tower via said at least one winch driven cable and to manipulate the suspended load in a firing line of the tower that extends along and outside of said vertical operative face of the tower. The tower is slewable about a vertical slew axis by means of a slewing drive at least into first and second operative positions wherein the firing line extends through the first and second moonpool areas respectively.

Process of fracturing subterranean, oil- and/or gas-bearing formations by injecting an aqueous fracturing fluid into a wellbore at a rate and pressure sufficient to penetrate into the formation, and to initiate or extend fractures in the formation, wherein the aqueous fracturing fluid is obtained by mixing at least an aqueous base fluid and an aqueous polyacrylamide concentrate having a concentration of 3.1 to 14.9% by weight of polyacrylamides, relating to the total of all components of the aqueous polyacrylamide concentrate, and wherein at least a part of the aqueous fracturing fluid injected additionally comprises a proppant.

A method for monitoring movement of a cantilever structure of an offshore platform, such as a jack-up platform or a self-elevating vessel, comprising providing a boundary model containing boundary limiting information of positions of the cantilever structure, wherein the boundary limiting information comprises at least position information of boundary limiting elements, such as obstacles; providing, during movement of the cantilever, position information of the cantilever representing an actual position of the cantilever; determining, during movement of the cantilever, a difference between the cantilever position information and the boundary limiting information of the boundary model; providing an output signal when the determined difference exceeds a predefined threshold value.

A Ground drilling device having a drilling carriage and a sled movable back and forth on the drilling carriage, wherein at least one gear is present for the drive of the sled, whose rotary movement is transformed into a linear movement by means of a rack, wherein a force relieving pathway is provided to relieve the gear of a radially introduced force.

An attachable lighting system for a drilling rig. A method of providing lighting to a drilling rig site comprising, attaching at least one light fixture directly to the crown of a drilling rig on each of at least two sides, wherein the light fixture contains a fixed or removable light fixture attachment connecting the light fixture to the crown, resulting in one or more of enhanced evenness of site lighting, reduced shadows, reduced light pollution, reduced power consumption and/or reduced diesel usage.

An attachable lighting system for a drilling rig. A method of providing lighting to a drilling rig site comprising, attaching at least one light fixture directly to the crown of a drilling rig on each of at least two sides, wherein the light fixture contains a fixed or removable light fixture attachment connecting the light fixture to the crown, resulting in one or more of enhanced evenness of site lighting, reduced shadows, reduced light pollution, reduced power consumption and/or reduced diesel usage.

The present invention discloses an anchor supporting intelligent device, belonging to the field of electromechanical devices for fully mechanized working faces. The device includes four parts of net supporting systems, anchoring systems, ground supporting systems and power and turning systems. The net supporting system is installed above the ground supporting system. The anchoring system is installed below a main beam and a middle main beam in the net supporting system through screws. The ground supporting system is installed below the main beam and the middle main beam in the net supporting system to provide support for the whole device. Two ends of the power and turning system are respectively connected with the main beam and the middle main beam in the net supporting system in a mode of pin connection. Further, the device disclosed by the present invention is small in volume and compact in structure, has functions of cooperative operation of multiple anchor rods and auxiliary paving of anchor nets, and is high in anchoring efficiency. Moreover, the device adopts a stepping moving mode, so that the device is smooth in operation, flexible in turning and good in maneuverability.