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Tung oil or China wood oil is a drying oil obtained by pressing the seed from the nut of the tung tree (Vernicia fordii). Tung oil hardens upon exposure to air (through polymerization), and the resulting coating is transparent and has a deep, almost wet look. Used mostly for finishing and protecting wood, after numerous coats, the finish can ...
A drawworks is the primary hoisting machinery component of a rotary drilling rig.Its main function is to provide a means of raising and lowering the traveling block.The wire-rope drill line winds on the drawworks drum and over the crown block to the traveling block, allowing the drill string to be moved up and down as the drum turns.
Heavy-weight drill string part due to stress cracking. Tripping pipe (or "Making a round trip" or simply "Making a trip") is the physical act of pulling the drill string out of the wellbore and then running it back in.
The earliest record of well drilling dates from 347 AD in China. [1] Petroleum was used in ancient China for "lighting, as a lubricant for cart axles and the bearings of water-powered drop hammers, as a source of carbon for inksticks, and as a medical remedy for sores on humans and mange in animals."
Tongs consist a single band of bent metal, as in sugar tongs, most asparagus tongs (which are no longer common) [2] and the like. Sugar tongs are usually silver, with claw-shaped or spoon-shaped ends for serving lump sugar. Asparagus tongs are usually similar but larger, with a band near the head that limits how far the tongs can expand.
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Download QR code; Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... Oil fields of Oman (2 P) P. Oil fields of Pakistan (4 P)
Vernicia fordii (usually known as the tung tree (Chinese: 桐, tóng) and also as the tung-oil or tungoil tree , the kalo nut tree, and the China wood-oil tree) is a species of flowering plant in the spurge family Euphorbiaceae. [2] [3] It is native to southern China, Myanmar, and northern Vietnam. [4]