| 释义 |
▪ I. downwell, a. and adv. Oil Industry.
(see below)
[f. down prep. + well n.1]
A. adj. (Stressed ˈdownwell.) = *downhole a.
B. adv. (Stressed downˈwell.) = *downhole adv.
1954World Oil Mar. 122/1 The down-well instrument device will record nine subsurface phenomena. 1973Times 31 Oct. (Offshore Supply Suppl.) p. vii/3 He has picked up a bountiful bonus by drawing Dresser Oilfield Products on to his base to supply drilling fluids, rockbits, cement and downwell detection equipment. 1982McGraw-Hill's Biotechnol. Newswatch 20 Dec. 8 For every barrel brought up by gusher, pump, or tertiary flooding, two or more barrels stay downwell, locked up in the formation forever. 1983Offshore May 146/1 The cables were created for downwell pumping systems working in hostile environments and harsh sea conditions.
▪ II. downˈwell, v.
[Partly a back-formation from *downwelling vbl. n., ppl. a., partly f. down adv. after upwell v.]
intr. Of seawater or other fluid: to sink in a downward current.
1967Oceanogr. & Marine Biol. V. 61 According to Deacon..the heavier Subantarctic Water must downwell at the Convergence in greater quantity than the Subtropical Water. 1972Nature 7 Apr. 261/2 The spreading ocean floor in the northern Pacific is downwelling at present along the Aleutian trench. 1984A. C. & A. Duxbury Introd. World's Oceans vi. 186 Water at a surface convergence sinks, or downwells. |