The U.S. is breaking oil-production records with fewer drilling rigs. Here's how.

U.S. oil production has been holding at or near record highs since October, topping the previous peak from 2020, even though the number of active domestic oil drilling rigs is down by nearly 30% from four years ago.Strength in oil prices and gains in investment and output efficiency have contributed to that climb, though analysts see a potential slowdown in output growth ahead. U.S. oil production has “nearly tripled in the last 15 years, fueled by advances in drilling and fracking technology and investment ...