Abstract: An apparatus for warming objects such as production conduits at a well site comprises an internal combustion engine driving a well pump. A heat exchanger shell is connected to an exhaust port of the engine, and has an output port. A circulating pump is driven by the engine, and a heating circuit is connected to the circulating pump such that liquid in the heating circuit is pumped from a pump output of the circulating pump through the heating circuit to a pump intake of the circulating pump. The heating circuit comprises a heat absorbing portion inside the heat exchanger shell arranged such that heat from the exhaust of the engine is transferred to the liquid therein, and a heating conduit arranged adjacent to a production conduit or other desired object such that heat from the liquid in the heating conduit is transferred to the object.

Abstract: A portable heat dispensing unit is provided with retractable ducts, and an internal heat chamber, having suitable in line apertures in the heater container vessel and heat chamber to accept a source of heat from from inserted burners. The heat is then fan blown through a retractable duct fastened to the heat chamber which can be directed to deliver the heat where desired. Other accessory components are: A thermometer to monitor the heat intensity: A second retractable duct surrounding the heat duct to insulate it from cold winds, and also for use as a return air duct when heat is applied to an enclosed space such as a tent or room. An opening is provided into the container vessel between the two ducts to allow the return air to be recirculated by a fan which moves the air through the heat chamber. The burner insertion holes in the container vessel also act as auxiliary air openings providing make up air access for burner requirements.

Abstract: In a portable preheater of the type used for burning a fuel and air mixture generated from a pressurized gas cylinder and blower, and for delivering hot exhaust air for preheating, the improvements including a warming receptacle formed to support the fuel gas cylinder and define a substantially enclosed pathway around at least a portion of a cylinder supported in the receptacle and further including means for diverting and feeding back a minor portion of the hot exhaust air delivered by the engine preheater into the warming receptacle whereby the fuel gas cylinder is maintained at a temperature to permit continuous vaporization of the fuel at a desired rate. The novel combustion chamber arrangement for dynamically interpenetrating fuel stream and air flow, stationary turbine blade for helical diversion and further mixing, and retroreflective secondary burning, coact to afford long burning time at operative temperatures using small gas cylinders of the disposable type.

Abstract: An apparatus for generating thermal and electrical energy includes an internal combustion engine connected to and adapted to drive a generator for providing electrical power and a brake for generating thermal energy. In one embodiment, a heat carrier flows through appropriate conduits for absorbing heat energy from the brake, from the combustion chamber of the engine, and from the engine exhaust gases and delivers the heat energy to a end-use heat exchanger, for example, a room or space heater. In a second embodiment, the engine exhaust gas flow is used to drive a gas turbine that, in turn, drives a compressor in a thermal cycle to provide additional heat transfer capability.

Abstract: A device for preheating gases of waste lines, particularly for the catalytic purification of exhaust gases comprises a conduit for the passage of the waste gases which is provided with a widened portion defining an annular flow passage around a portion of the conduit for preheated gases with a through flow for the heated gases and the waste gases out the opposite end of the conduit. The preheated gases are generated in a tubular burner which is tangentially connected into the waste gas conduit at the location of the widened section thereof. The burner includes means for feeding air and fuel into the end of the tubular burner and igniting them in a combustion chamber thereof for flow into a partially annular space around a portion of the waste gas conduit through an intermediate convergent section into the flow path of the gases through the conduit.