A shaft enlargement arrangement for a boring system is provided, the shaft enlargement arrangement comprising a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head; and a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head to bore a leading hole as the boring system proceeds to bore downwardly. In an embodiment, the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements.

An extreme load creeper interface comprising a planar roller array wherein a plurality of extreme load rollers with parallel rotational axes are dispersed both laterally and longitudinally within the plane, so as to fractionalize a weight applied perpendicular to the plane, and thereby promote longitudinal motion of the roller array in a direction perpendicular to the plurality of roller rotational axes.

The present invention relates in some embodiments to a bottom supported drilling unit having two drilling stations for independently drilling (or otherwise working on) two wells simultaneously from a cantilever.

For controlling movement of a cantilever of an offshore platform, displacements required for displacing an item to a target position including longitudinal skidding displacement and transverse skidding displacement of the cantilever of the cantilever are determined from current position data and target position data. From position dependent support load data support loads during the longitudinal skidding displacement are determined. If and until a sum of support loads or a highest support load decreases during the longitudinal skidding displacement towards the target position, the longitudinal skidding displacement precedes the transverse skidding displacement. If a sum of support loads or a highest support load increases during the longitudinal skidding displacement towards the target position, the transverse skidding displacement towards the target position precedes the longitudinal skidding displacement.

A powered unit with a reeving system for supporting a load associated with operation of the powered unit. The reeving system has a first cylinder with a first rod movingly disposed therein. There is a movable sheave spreader engaged with the first rod, and having a first spreader sheave, the movable sheave spreader also movably engaged with the powered unit.

The present invention relates to devices and methods for transporting a Blow Out Preventer (BOP). A device for transporting and installing a BOP stack for a land-based drilling rig, comprises a skid for transporting a BOP stack in a substantially horizontal position. The device comprises a moveable support configured to be fixed removably to one end of the BOP stack and to translate longitudinally on the skid, where a section of the skid is extendable longitudinally outwards from an end of the skid, into an extended configuration in which the section can placed adjacent to or on a place of installation of the BOP stack, and is configured to be part of the skid on which the moveable support is configured to translate, so that the moveable support may translate longitudinally onto the section of the skid, in its extended configuration, to be above the place of installation.

A truck-mounted flipped automated operation equipment for a well workover, which includes a derrick and an operation platform. A guide rail is arranged on the front and back sides of the center of the operation platform, respectively, and a hydraulic clamp mechanism is arranged on the guide rail. An inner clamp frame support is arranged under the derrick, and a lifting cylinder is fixed on the left side of the derrick. The piston part of the lifting cylinder is provided with a fixed plate configured to rise and fall with the lifting cylinder, and the right side of the operation platform is hinged on the fixing plate. The fixed plate is further provided with a flipped cylinder. The cylinder barrel of the flipped cylinder is hinged on the fixed plate, and the piston part of the flipped cylinder is connected to the lower part of the operation platform.

A system and a method are for positioning a drilling rig arranged to drill in a ground. The system has a positioning jig including at least one coupling portion; a drilling rig including at least two coupling portions; and at least two anchoring elements including an upper coupling portion and a lower coupling portion. The lower coupling portion of the anchoring element is arranged to be releasably fixed to the ground. The upper coupling portion of the anchoring element is arranged to be connected to the coupling portion of the positioning jig and to the coupling portion of the drilling rig, so that the upper coupling portion of the anchoring element can optionally be connected to the positioning jig or the drilling rig.

The invention relates to a low-power microwave coring machine suitable for lunar rocks and a use method. The low-power microwave coring machine suitable for lunar rocks comprises an equipment platform, wherein the support framework front plate and the support framework rear plate are mounted on the equipment platform in a sliding manner, a rear end surface of the support framework rear plate is connected with a front end of the microwave generator mounted on the equipment platform, a rear end of the microwave generator is sequentially connected with the fixed waveguide, the rotary waveguide, the power divider and the drill drum, the high-precision slip ring structure is mounted on the drill drum, the gear ferrules are arranged on an outer wall of the rotary waveguide and an outer wall of the drill drum.

Drilling installation comprising a cantilever with a drilling floor for performing drilling operations; further comprising an independent operations handling system arranged for handling equipment underneath the drilling floor independent of the drilling operations on the drilling floor, wherein the independent operations handling system comprises a handling element for cooperation with the equipment to be handled, wherein the handling element is extendible underneath the cantilever.