A ballast tray assembly includes a first side-beam; a second side-beam parallel to the first side-beam; a first cross-beam between the first side-beam and the second side-beam; a second cross-beam between the first side-beam and the second side-beam; a third cross-beam between the first side-beam and the second side-beam; a fourth cross-beam between the first side-beam and the second side-beam; a first interface beam and a second interface beam parallel to the first side-beam and the second side-beam between the second cross-beam and the third cross-beam to provide a support interface; and an interface plate attachable to the support interface.

A ballast tray assembly includes a first side-beam; a second side-beam parallel to the first side-beam; a first cross-beam between the first side-beam and the second side-beam; a second cross-beam between the first side-beam and the second side-beam; a third cross-beam between the first side-beam and the second side-beam; a fourth cross-beam between the first side-beam and the second side-beam; a first interface beam and a second interface beam parallel to the first side-beam and the second side-beam between the second cross-beam and the third cross-beam to provide a support interface; and an interface plate attachable to the support interface.

A separable integrated type vibration isolator includes: divided vibration isolator units comprising casings having accommodation spaces formed open on tops thereof and reinforced concrete comprising reinforcing bars arranged in the accommodation spaces and the connection spaces and concrete cast in the accommodation spaces; casing connection parts for connecting the casings of the divided vibration isolator units to each other; reinforcing bar connection parts for connecting the reinforcing bars exposed to the connection spaces of the neighboring divided vibration isolator units to each other; and fillers adapted to be cast in the connection spaces where the plurality of divided vibration isolator units is connected to form reinforced concrete.

A separable integrated type vibration isolator includes: divided vibration isolator units comprising casings having accommodation spaces formed open on tops thereof and reinforced concrete comprising reinforcing bars arranged in the accommodation spaces and the connection spaces and concrete cast in the accommodation spaces; casing connection parts for connecting the casings of the divided vibration isolator units to each other; reinforcing bar connection parts for connecting the reinforcing bars exposed to the connection spaces of the neighboring divided vibration isolator units to each other; and fillers adapted to be cast in the connection spaces where the plurality of divided vibration isolator units is connected to form reinforced concrete.

A vehicle support structure, which in petroleum wellsite operations is commonly called a rig mat or a ground stabilizing mat, includes: a main body including an upper surface, an underside, a front end and a rear end, the main body defining a planar structuring with a thickness; a front pad coupled to the main body and positioned adjacent the front end; a rear pad coupled to the main body and positioned adjacent the rear end, the front pad and the rear pad each configured to be moveable between a supporting position protruding from the underside of the main body and a retracted position in plane or retracted from the underside; a front pad drive mechanism for the front pad, the front pad drive mechanism configured to drive the front pad to move between the supporting position and the retracted position and to move the front pad forward and backwards and side to side relative to the main body; and a rear pad drive mechanism for the rear pad, the rear pad drive mechanism configured to drive the rear pad to move between the supporting position and the retracted position and to move the rear pad forward and backwards and side to side relative to the main body, the front pad and the rear pad being configured to operate to support the main body in an elevated position relative to a ground surface and configured to move the main body forward and backwards and side to side relative to the front pad and the rear pad and over the ground surface. In use as a rig mat, a method for well site operations includes: placing the rig mat at a position on a first well site; positioning a rig on the rig mat; and adjusting the position of the rig mat while the rig remains supported on the rig mat such that the rig is centered on a wellhead of the well site.

A vehicle support structure, which in petroleum wellsite operations is commonly called a rig mat or a ground stabilizing mat, includes: a main body including an upper surface, an underside, a front end and a rear end, the main body defining a planar structuring with a thickness; a front pad coupled to the main body and positioned adjacent the front end; a rear pad coupled to the main body and positioned adjacent the rear end, the front pad and the rear pad each configured to be moveable between a supporting position protruding from the underside of the main body and a retracted position in plane or retracted from the underside; a front pad drive mechanism for the front pad, the front pad drive mechanism configured to drive the front pad to move between the supporting position and the retracted position and to move the front pad forward and backwards and side to side relative to the main body; and a rear pad drive mechanism for the rear pad, the rear pad drive mechanism configured to drive the rear pad to move between the supporting position and the retracted position and to move the rear pad forward and backwards and side to side relative to the main body, the front pad and the rear pad being configured to operate to support the main body in an elevated position relative to a ground surface and configured to move the main body forward and backwards and side to side relative to the front pad and the rear pad and over the ground surface. In use as a rig mat, a method for well site operations includes: placing the rig mat at a position on a first well site; positioning a rig on the rig mat; and adjusting the position of the rig mat while the rig remains supported on the rig mat such that the rig is centered on a wellhead of the well site.

A laminated rail for a sawmill bed comprises an outer plate having a middle body portion, a top portion, and a bottom portion; and an inner plate secured to the outer plate, the inner plate having a middle body portion, a top portion, and a bottom portion. The middle body portion of each of the inner plate and the outer plate may have substantially the same cross sectional tacking configuration to allow the inner plate to be matingly received by the outer plate. A channel may be formed between the top portion of the inner plate and the top portion of the outer plate, the channel being shaped and dimensioned to receive and secure a track in a sandwich grip.

A stiffening device for a base frame is disclosed. The disclosed stiffening device comprises hydraulic jacks fitted with structural members of the base frame; strain gauges coupled to the structural members of the base frame, the strain gauges configured to detect deformation in the structural members of the base frame and generate first signals based on the detected deformation in the structural members; at least one signal conditioner unit coupled to the strain gauges to receive the first signals and generate second signals by performing any or a combination of amplification, filtering and conversion of the received first signals; and a hydraulic console configured to actuate at least one of the hydraulic jacks when value of received second signals is above a predefined threshold value. Upon actuation, the actuated at least one of the jacks stiffens at least one of the structural members of the base frame.

A stiffening device for a base frame is disclosed. The disclosed stiffening device comprises hydraulic jacks fitted with structural members of the base frame; strain gauges coupled to the structural members of the base frame, the strain gauges configured to detect deformation in the structural members of the base frame and generate first signals based on the detected deformation in the structural members; at least one signal conditioner unit coupled to the strain gauges to receive the first signals and generate second signals by performing any or a combination of amplification, filtering and conversion of the received first signals; and a hydraulic console configured to actuate at least one of the hydraulic jacks when value of received second signals is above a predefined threshold value. Upon actuation, the actuated at least one of the jacks stiffens at least one of the structural members of the base frame.

Apparatus and methods related to mats and connects are described. The apparatus include a mat having a top side, a bottom side, and an interior defined between the top side and the bottom side, and at least one connector post extending within the interior of the mat, wherein the at least one connector post comprises a connector pin cavity extending within the interior of the mat and configured to receive a connector pin and at least one locking structure configured to engage with a portion of the connector pin and secure the connector pin to the at least one connector post.