A tubing anchor catcher for anchoring well equipment in a well conduit to arrest movement in both longitudinal directions and rotational directions. A mandrel connected to the equipment has one or more grooves for slideably receiving respective drive pins from a drag body on the mandrel. A slip cage on the mandrel houses a slip or slips for selectively engaging and disengaging the conduit. Manipulation of the mandrel at surface causes the drive pins to move within the one or more grooves on the mandrel and the drag body conical surface to move toward the slip cage driving the slip or slips outward to grip the conduit. Further pulling at surface maintains the set position. The anchor is unset at surface by releasing the tension, rotating the mandrel in the second direction, and pulling the mandrel to disengage the slip or slips.

A support system, an excavation arrangement, and a process of supporting an object are disclosed. The support system includes a weight-bearing device and a camming mechanism positioned below the weight-bearing device. A downward force on the weight-bearing device at least partially secures the camming mechanism to opposing surfaces. The excavation arrangement includes a borehole, a support system positioned within and secured to the borehole, and an object positioned on and supported by the support system. The process includes positioning and securing the support system and positioning the object on the weight-bearing device.

A security device placed at a wellhead over a blowout preventer valve, which can be activated to catch a cable and/or a string of pipes upon a cut event or accident, preventing the fall of the same into the well, which includes: an upper horizontal plate and lower horizontal plate, vertically aligned, each having a circular central orifice for the passing of a string of pipes and/or a cable, and a cutout on the front part thereof, located between its front edge and the circular orifice; lateral support device, located between the upper and lower plates, that connect the plates together, delimiting an aperture at the front part of the device that together with the cutouts on the upper and lower plates form a front passage toward the inside of the device; at least two clamps driven by corresponding hydraulic cylinders, which are arranged at an acute angle with the vertical axis of the device; and a movable vertical plate arranged on the front part of the device between the lateral support means, pivotally connected by one of its sides to the upper and lower plates. The movable vertical plate, in a first position, allows for the horizontal passing of a string of pipes and/or cables through the front passage to a location at the center of the device, and in a second position, the movable vertical plate blocks the front passage. In a first position the clamps allow for vertical movement of the string of pipes and or cables and in a second position the clamps block the movement of the same.

A brake device for engaging an inner surface of a drill string within a borehole. The brake device has a driving member that defines a plurality of wedge surfaces, a brake retainer that receives at least a portion of the driving member, and a plurality of braking elements positioned in contact with at least a portion of the outer surface of the driving member. The brake retainer has a biasing member that is operatively coupled to the driving member. The biasing member of the brake retainer biases the driving member in a proximal direction relative to the longitudinal axis of the drill string to position the wedge surfaces in contact with corresponding braking elements, and the wedge surfaces drive the braking elements radially outwardly to engage the inner surface of the drill string. The brake device is not coupled to an inner tube assembly.

Provided is an internal slip, a sealing/anchoring subassembly, a well system, and method. The internal slip, in one aspect, includes a tubular, the tubular having a tubular inner diameter (ID.sub.t) and a tubular outer diameter (OD.sub.t). The internal slip, in this aspect, further includes a first set of teeth disposed along the tubular inner diameter (ID.sub.t), the first set of teeth configured to engage with base teeth disposed on a base outer diameter (OD.sub.B) of a base positioned radially inside of the tubular. The internal slip, in this aspect, further includes a second set of teeth disposed along the tubular outer diameter (OD.sub.t), the second set of teeth configured to engage with stroke sleeve teeth disposed on a stroke sleeve outer diameter (OD.sub.SS) of a stroke sleeve positioned radially outside of the tubular, wherein one or more of the second set of teeth are generally symmetrical about a centerline thereof.

Provided is an internal slip, a sealing/anchoring subassembly, a well system, and method. The internal slip, in one aspect, includes a tubular, the tubular having a tubular inner diameter (ID.sub.t) and a tubular outer diameter (OD.sub.t). The internal slip, in this aspect, further includes a first set of teeth disposed along the tubular inner diameter (ID.sub.t), the first set of teeth configured to engage with base teeth disposed on a base outer diameter (OD.sub.B) of a base positioned radially inside of the tubular. The internal slip, in this aspect, further includes a second set of teeth disposed along the tubular outer diameter (OD.sub.t), the second set of teeth configured to engage with stroke sleeve teeth disposed on a stroke sleeve outer diameter (OD.sub.SS) of a stroke sleeve positioned radially outside of the tubular, wherein one or more of the second set of teeth are generally symmetrical about a centerline thereof.

An assembly which includes (a) a plug apparatus having slips, an outer sealing element, and a pump-out plug which blocks internal flow through the apparatus for use as a bridge plug and (b) a wireline adapter kit having an adapter rod which screws into the pump-out plug to set the plug apparatus by wireline, wherein the adapter rod shears from the pump-out plug when the set pressure is reached, the plug apparatus is convertible to a flow-through catching plug by applying a pump-out pressure to the pump-out plug from above, and the plug apparatus is retrievable after use.