PROBLEMS AFFECT DPP AND CP
Nozzels Partially Plugged 水眼部分堵塞
Increase In Pump Speed 泵速增加 Nozzels Unplugging 水眼解堵 Partial Loss Circulation 部分井漏 Hole In DP 钻具刺漏 Pump Washout 泵冲蚀 Gels Breaking 泥浆胶凝打破 Choke Washed 节流阀刺漏 Choke Plugged 节流阀堵塞 Hole Bridged 井眼桥堵 In Case of No Returns完全井漏 0
Pump Efficiency 泵效下降
TYPE OF KICK AS INDICATED
BY SURFACE GAUGES
1. Drill Pipe Pressure (DPP) and Casing Pressure
(CP) on initial shut in.
Big difference between DPP and CP on initial
shut in (except in case of a very large liquid
CP and DPP close to each other (except a gas
kick in a horizontal well)
2. Pressure changes with time.
CP and DPP keep increasing with time ( pressure
CP and DPP stabilize and stay ( no inversion) 3. Gauge response when circulating influx
When circulation is started, CP increase quite
quickly but DPP responds with a delay ( lag
When circulation is started, CP and DPP
respond quite rapidly ( no lag time)
4. Volume change during circulation.
CP increase with an increase in pit volume while
the kick is being circulated to surface.
Very little increase in CP and very little increase
in pit gain during the circulation of the kick.