1946 Oil Weekly 9 Dec. 63 (advt.) From Bethlehem you can obtain..down-well equipment.

1954 World Oil Mar. 122/1 The down-well instrument device will record nine subsurface phenomena.

1973 Times 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.

1983 Offshore May 146/1 The cables were created for downwell pumping systems working in hostile environments and harsh sea conditions.

2016 B. Sun Multiphase Flow Oil & Gas Well Drilling v. 138 The killing operation should be carried out immediately, due to the complex downwell situation.

1975 U.S. Patent 3,918,520 1 The inflatable packer being automatically sequentially inflated and deflated downwell.

1982 McGraw-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.

2001 Gulf of Mexico OCS Oil & Gas Lease Sale 181: Eastern Planning Area: Final Environm. Impact Statem. (U.S. Dept. Interior: Minerals Managem. Service, Gulf of Mexico OCS Region) I. iv. 116 Industry does have the option to encapsulate these kinds of solid wastes and dispose of the wastes offshore downwell, but this is not anticipated to occur on leases in the EPA [= Eastern Planning Area].

1967 Oceanogr. & Marine Biol. 5 61 According to Deacon..the heavier Subantarctic Water must downwell at the Convergence in greater quantity than the Subtropical Water.

1992 Progress Oceanogr. 29 65 Part of the equatorial circulation may participate in a closed tropical circulation cell in which water upwells at the equator and downwells elsewhere.

2012 Nature Geosci. 5 682/2 Today, deserts develop where dry air downwells in the subtropical limb of the Hadley circulation cell.

2013 P. R. Pinet Invitation to Oceanogr. (ed. 6) x. 347/1 Ekman transport causes water to converge and to downwell.