本文通过几年来大量的实验分析和现场试验，总结出气水两相在井筒内主要存在气泡流、柱塞流、环膜流、霉状流。
Based on a lot of experimental analysis and field tests, the states of bubble flow, plunger flow, ring film flow, fog flow lied in gas-water phases in wellbore are summarized.
应近似地按柱塞位于下止点时的环隙计算抽油泵的环隙静、动态漏失量。
And the static and dynamic leakage of the pump should be approximately calculated according to the annulus at the end of the plunger's downstroke.
增压器高压腔体为承受周期性环向高应力的厚壁筒，在超高压下缸价内径与柱塞外径应变值不同，从而形成工作间隙。
The high pressure cylinder of the booster is a thick wall barrel which can bear the high periodic circumferential stress.
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