Stories from Daqing · China

Liu Li developed a new type of adjustable packing gland by observing how his apprentice rotated the bottom of a lipstick, causing it to overflow. Liu Li, a team leader at the Daqing Oilfield, has developed a new adjustable packing gland for oilfield operations.

Over 38 years, oil worker Zhang Yong has developed and improved more than 40 downhole tools, earning 22 national patents.

An innovation at Daqing Oilfield has significantly improved the efficiency of replacing seal rings on giant sucker rod pumps. The modification reduced seal ring replacement time from over 40 minutes to 10 minutes.