41
Graham David James: Gas turbines and engines. Boc Group, October 5, 1983: GB2117053-A (70 worldwide citation)

The combustion chambers 30 of gas turbine units 6(a) to 6(c) (or equivalent piston engines) are supplied with fuel gas via pipe 26 and in order to compensate for a substantial decline in the calorific value of the fuel gas over a period of time, commercially pure oxygen or oxygen-enriched air is sup ...


42
Hayward John T: Means of transporting crude oil through a pipeline. Skinner Martin J, March 11, 1975: US3870063 (68 worldwide citation)

A means of transporting crude oil through a pipeline from a transmission station, such as a producing area, to a receiving station, in which the crude oil is not economically pumpable through the environment in which the pipeline passes, including adding a pour point depressant to the crude oil at t ...


43
Wirth Guy B, Jahnig Charles E: Process for steam cracking crude oil. Esso Research and Engineering Company, November 2, 1971: US3617493 (66 worldwide citation)

An improved process for steam cracking a crude oil feed to produce products useful as chemical raw materials or fuels characterized by the steps wherein the crude oil feed is first passed through the convection section of a steam cracking furnace to vaporize the materials in the feed boiling below a ...


44
Meishi Tanaka, Shuji Sugiyama: Method of refining crude oil. Idemitsu Kosan, Frishauf Holtz Goodman Langer & Chick P C, December 22, 1998: US05851381 (64 worldwide citation)

A method of refining crude oil by distillation and desulfurization for the preparation of petroleum products can reduce cost of apparatus and cost of operation and can be operated with better stability by simplified control of operation. In the method, a naphtha fraction is separated from crude oil ...


45
Carlos Vallejos, Tito Vasquez, Cesar Ovalles: Process for the downhole upgrading of extra heavy crude oil. Intevep, Bachman & LaPointe P C, April 6, 1999: US05891829 (63 worldwide citation)

A down hole hydroconversion process improves the viscosity, API gravity, and distillate proportions of heavy crude oils by employing a hydrogen donor, methane and steam down hole wherein the mineral formation down hole acts as a catalyst for the hydroconversion process.


46
Dieter Reinhardt: Method for converting carbon-containing raw material into a combustible product gas. Kraftwerk Union Aktiengesellschaft, Herbert L Lerner, Laurence A Greenberg, September 17, 1985: US04541841 (63 worldwide citation)

Converting carbon-containing raw material, particularly coal, wood or crude oil, into a combustible product gas by a gasification reaction in the presence of a catalyst which is dissolved in the steam intended for the gasification reaction, forming a homogeneous gaseous solution. The ash-containing ...


47
Iulius M Cucuiat, Vasile V Popp: Desulfurization process and installation for hydrocarbon reservoir fluids produced by wells. Institutul de Cercetari Si Proiectari Pentru Petrol Si Gaze, Karl F Ross, October 16, 1979: US04171349 (63 worldwide citation)

Hydrogen sulfide is removed from a three-phase mixture of crude oil, natural gas, and water as it issues as a stream from an oil well by first adding liquid sulfur dioxide to the stream without substantially changing its temperature or pressure and then turbulencing the stream to react most of the h ...


48
David J Soderberg: Pour-point depression of crude oils by addition of tar sand bitumen. Amoco Corporation, Ekkehard Schoettle, William H Magidson, Ralph C Medhurst, March 1, 1988: US04728412 (62 worldwide citation)

The present invention provides a process for reducing the pour point of a crude oil by adding a pour-point depressant selected from the group consisting of raw bitumen and hydrotreated bitumen to form a blend possessing a relatively lower pour point.


49
Dean P Nichols: Method of consolidation of oil bearing sands. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, Charles J Speciale, February 26, 1985: US04501328 (62 worldwide citation)

Wells drilled in poorly consolidated sand formations can be consolidated by heating a portion of the crude oil in situ in the bottom of the well so as to drive off the lighter ends leaving the heavy ends and asphaltenes at the bottom of the well. If additional pressure is then added at the top of th ...


50
Clifford L Redus, Peter L Sigwardt: Subsea pumping device incorporating a wellhead aspirator. Texaco, Jack H Park, Kenneth R Priem, Russell J Egan, April 6, 1993: US05199496 (61 worldwide citation)

A system is disclosed for subsea transportation of a hydrocarbon production stream utilizing a wellhead aspirator to reduce wellhead flowing pressure. By using the Bernoulli effect, a head is delivered to the flowing stream that enables the crude oil/water/gas fluid within the system to be moved far ...