Abstract: A filter cartridge is provided that includes a plurality of individual fibers, wherein the individual fibers have different cross sections and are arranged into a random lattice of fibers. The filter cartridge also includes at least one flat sheet media, wherein the plurality of individual fibers are thermally bound to the at least one flat sheet media, wherein the flat sheet media is spirally wound to create a cylindrical profile.

Abstract: A frame stiffener for a power tong frame comprises a body having a top surface securable to a top plate of the frame, a bottom surface securable to the bottom plate of the frame, an outer side and an interior side having a plurality of recesses, each recess formed to conform to an angular portion of an adjacent dumbbell roller secured within the frame along with a plurality of other dumbbell rollers to rollably surround, engage and stabilize a ring gear rotatably disposed within the frame.

Abstract: A power tong having a door that pivots in a vertical plane that is parallel to a plane that includes the axis of the tubular being made up or broken down by the power tong. The door is pivotally coupled to a power tong body for movement between an open position, that allows a tubular joint to be introduced through a throat and into a bay of the power tong, and a closed position that closes the bay of the power tong to enable the gripping and rotating components of the power tong to be engaged to grip and rotate the tubular joint introduced into the power tong. The power tong door includes structures that are engaged upon pivotal closure of the door with corresponding structures on the power tong body.

Abstract: A filter element is provided that includes a plurality of individual fibers, wherein each individual fiber has a non-circular cross-section. The filter element also includes at least one flat sheet media, wherein the plurality of individual fibers are thermally bound to the at least one flat sheet media, wherein the flat sheet media is spirally wound to create a cylindrical profile.

Abstract: A frame stiffener for a power tong frame comprises a body having a top surface securable to a top plate of the frame, a bottom surface securable to the bottom plate of the frame, an outer side and an interior side having a plurality of recesses, each recess formed to conform to an angular portion of an adjacent dumbbell roller secured within the frame along with a plurality of other dumbbell rollers to rollably surround, engage and stabilize a ring gear rotatably disposed within the frame.

Abstract: A power tong having a door that pivots in a vertical plane that is parallel to a plane that includes the axis of the tubular being made up or broken down by the power tong. The door is pivotally coupled to a power tong body for movement between an open position, that allows a tubular joint to be introduced through a throat and into a bay of the power tong, and a closed position that closes the bay of the power tong to enable the gripping and rotating components of the power tong to be engaged to grip and rotate the tubular joint introduced into the power tong. The power tong door includes structures that are engaged upon pivotal closure of the door with corresponding structures on the power tong body.

Abstract: A latch mechanism for securing a pivoting door of a power tong in a closed position across a lateral opening to an interior bay of the power tong includes a door cylinder coupled at a proximal end to the body and having an extendable rod to pivot the door between a closed position, across the lateral opening, and an open position providing lateral access to the interior bay, the power tong further includes a latch cylinder coupled at a proximal end to the door and having an extendable rod to pivot a latch member to pivot between an engaged position, to engage a latch post on the body, and a retracted position to disengage the latch post of the body.

Abstract: A latch mechanism for securing a pivoting door of a power tong in a closed position across a lateral opening to an interior bay of the power tong includes a door cylinder coupled at a proximal end to the body and having an extendable rod to pivot the door between a closed position, across the lateral opening, and an open position providing lateral access to the interior bay, the power tong further includes a latch cylinder coupled at a proximal end to the door and having an extendable rod to pivot a latch member to pivot between an engaged position, to engage a latch post on the body, and a retracted position to disengage the latch post of the body.