Ka Phupu, 2019, khamphani ea rona e saenetse konteraka ea khiriso ea top drive ea selemo se le seng Zhengtong, Xinjiang, 'me top drive ea eona ea NOV TDS-11A e ile ea nchafatsoa 'me ea fihla sebakeng seo ka hare ho beke e le' ngoe ho tloha ka letsatsi la ho saena konteraka.