Abstract: A well borehole is prevented from deviating from its intended vertical path as it is being drilled by use of a sub assembly which is eccentrically weighted with respect to its axis of rotation. Such a sub assembly can comprise a straight tubular member weight relieved along one side by, for example, forming a cavity within the heavy walls of the tubular member along the side of the collar. Thus, the eccentric weight is imposed upon the drill bit without providing any protrusions or elbows which are designed to bear on the wall of the borehole. Additionally, as the cavity is contained within the heavy walls of the tubular member, drilling fluids containing various debris cannot inhabit the cavity, thus maintaining a constant eccentric weight upon the drill bit.

Abstract: A well borehole is prevented from deviating from its intended vertical path as it is being drilled by use of a sub assembly which is eccentrically weighted with respect to its axis of rotation. Such a sub assembly can comprise a straight tubular member weight relieved along one side by, for example, forming a cavity within the heavy walls of the tubular member along the side of the collar. Thus, the eccentric weight is imposed upon the drill bit without providing any protrusions or elbows which are designed to bear on the wall of the borehole. Additionally, as the cavity is contained within the heavy walls of the tubular member, drilling fluids containing various debris cannot inhabit the cavity, thus maintaining a constant eccentric weight upon the drill bit.

Abstract: A process for producing a degraded derivative tetrafluoroethylene product. A batch of solid tetrafluoroethylene material is placed in a structure having a cavity with the structure formed from a metal such as aluminum. The batch is heated in the structure with a temperature of between 1000 degrees Fahrenheit to 2000 degrees Fahrenheit. At least portion of the batch is removed from the upper end of the structure as the portion passes from a solid to a liquid phase. The portion is allowed to cool and re-solidify into a degraded derivative tetrafluoroethylene product.