Abstract: The composition and method of the present invention may be used for repairing potholes (10, 52), sealing or paving surfaces (10), curbs (93) and/or for interfacing, between paving (74) and structural members (72, 73). The preferable composition includes a mixture of a rubberized compound and an ethylene-unsaturated carboxylic acid co-polymer having a carboxylic acid content from about 0.5 to about 40 weight percent of the co-polymer. The rubberized compound may preferably be natural or synthetic rubber compounds, rubberized tar or the like. The ethylene-unsaturated carboxylic acid co-polymer preferably may be ethylene acrylic acid or the like. This composition may include a reinforcing agent, such as aggregate (16, 18, 56, 60), or a modifying agent, such as natural or synthetic fibers.

Abstract: A method of controlling the direction of a drill bit (3) at the downhole end of a drill string (2) drilling from a surface comprises providing two steerable stabilizers (4, 5) at the downhole end of the drill string (2) at locations spaced apart in the drilling direction and adjusting the orientation of the stabilizers to create reactive forces from the bore hole (6) to deflect the course of the bit (3) in a desired direction. The stabilizers (4, 5) are suitably arranged eccentrically and circumferentially offset by 180.degree..+-.60.degree.. In normal drilling the drill string (2) is rotated such that stabilizers (4, 5) engage the bore hole (6) to support a downhole motor (1) against tilting. When off course drilling is sensed the stabilizers are rotated to a position and stopped from rotation such that drilling forces generate reaction forces to cause a desired change of direction.