Abstract: A patch clamp for repairing holes and splits or cracks in pipes that convey liquids or gases having a unitary, cylindrical strap adapted to surround the pipe with a pair of opposed, interconnectable dogs forming the opposite ends thereof. The strap also includes two pairs of longitudinally extending grooves in the inner surface thereof located at substantially 180 degrees from one another. A resilient sealing strip to be positioned between the strap and the pipe against the hole or split to be repaired has one side conforming to the inner surface of the strap member and two spaced tongues having the same cross-sectional shapes as in one pair of the grooves in the strap member to form an interlocking connection therebetween. The other side of the strip has a convex surface facing the pipe which is compressed between the strap member and the pipe upon securing the dogs together by a threaded member.

Abstract: The powdered, blended, cement ingredients are stored and/or shipped prior to kilning and after being brought to the general region of use are then heated to the required temperature to obtain the desired characteristics of cement (i.e., the ability to harden). A further aspect is that the unkilned cement ingredients, either as a slurry when made by a "wet" process or formed into a slurry when made by a "dry" process, are shipped in an oil tanker during what is typically a dead-head run (e.g., from the United States to the Near East). Thinner is added to the slurry, reducing its viscosity and thereby making it easier to pump into and out of the tanker holds.