Abstract: A stop assembly includes a top plate and a stem. The top plate is configured to seat onto the stem. The stem is configured to rotate within grooves of the top plate so as to open and close a valve. The stem has a lower surface and an upper surface and includes a mating aperture through the central body extending above the upper surface. It also has a pair of tabs protruding from the upper surface adjacent the mating aperture. The mating surface and the pair of tabs divide the upper surface to form opposing ledges partially around a perimeter of the central body. The top plate has a central aperture and a pair of opposing grooves that create a pair of stops. The stops are configured to rest adjacent the opposing ledges, such that rotation of the stem contacts the pair of stops against the pair of tabs.

Abstract: A material composition identification assembly includes a unique metallic composition tag and a reader unit. The tag is associated with and coupled to a particular object, such as a pipe. The tag consists of a unique percent composition of a plurality of elements. The tag is placed within a portion of the pipe. The reader unit includes an input/output interface configured to detect the material composition tag. The reader unit is configured to process the material composition tag and identify the percent composition of the plurality of elements. The reader compares the percent composition to a database of numerical identifiers to isolate the historical data of the object.

Abstract: Disclosed is a tool joint connection comprising a pin having a body and a helically extending external pin thread and box having a body and a helically extending internal box thread. The external pin thread and internal box thread are configured for connection with each other such that when connected the pin body and the box body are aligned longitudinally. The box thread has a box base in contact with the box body and the pin thread having a pin base in contact with the pin body and the pin base is wider than said box base. In a preferred embodiment, the area wherein the box base is in contact with the box body defines the box contact area and the area wherein the pin base is in contact with the pin body defines the pin contact area and the pin contact area and said box contact area are generally the same.