A light hydrocarbon mixture for diesel engines; it has a boiling range just above that of kerosene. Used mostly for heavy vehicles such as lorries and busses and in the military. Its main characteristics include its sulfur content (350 ppm, 50 ppm, 10 ppm), its cold properties: CFPP, cloud point: winter and summer grade
High-compression, internal-combustion engine used extensively for powering drilling rigs. In a diesel engine, air is drawn into the cylinders and compressed to very high pressures; ignition occurs as fuel is injected into the compressed and heated air. Combustion takes place within the cylinder above the piston, and expansion of the combustion products imparts power to the piston. Diesel automatically ignites and burns when it is compressed to a very high pressure. The released energy is contained by the engine and powers the vehicle. The key difference between diesel and petrol engines is auto-ignition. A spark plug ignites the fuel in a petrol engine whereas a diesel engine auto-ignites. Diesel has a Cetane Index and Number rather than the Research Octane Number (RON) that petrol has.
A microscopic single-celled algae with a silica-rich cell wall. Diatoms can be so abundant that they can form thick layers of sediment from the organisms that died and sank to the bottom of the sea and have become an important component of deep-sea deposits since cretaceous time
Intrusion of fluid rock (e.g., molten rock, salt, or mud) caused by the difference in buoyancy and pressure between it and the overlying rock
Cars often use a diaphragm pump to move gasoline from the gas tank to the carburetor or fuel injection plugs
Is made by setting man-made diamonds in the tip or the cutting surface of the bit. Diamonds are many times harder than the hardest steel, so diamond bit makes it possible to have longer runs before a round trip is necessary to change the bits.
Porosity developed in a sediment after its initial deposition as a result of chemical and biological changes and burial. A form of secondary porosity as opposed to primary porosity. Fracture porosity is not thought of as diagenetic porosity
The pressure at which a liquid phase condenses from a vaporous fluid in equilibrium at a given temperature
