Changes between Version 19 and Version 20 of IOHN/AutoConRig/TrippingUseCases

Timestamp:

01/20/09 12:18:02 (15 years ago)

Author:

robertewald (IP: 85.19.67.218)

Comment:

--

IOHN/AutoConRig/TrippingUseCases

@@ -35 +35 @@
  1. Lower the drill string (opposite direction to pull).
  1. Connect the mud pump and apply a reduced flow rate, observer the pump pressure two possible cases:
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    a. If pump pressure stabilized:
      i. Circulate with an appropriate mud if the existing one does not do the job (requires automation in mud mixing). Increase the flow rate to the recommended flow rate.
@@ -60 +152 @@
 
 '''NB 3''' The gas kick scenario was covered by CODIO case study 1.
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+{{{ 
+#!graphviz.dot
+digraph G { overlap=false;
+node [fontname=Arial, fontsize=6, color=grey80, fillcolor=grey95, fontcolor=red3, style=filled, width=1, shape=box];
+edge [color=grey50 ];
+start [label="Manual\nTrip-in", fillcolor=grey90, fontcolor=black]
+powerloss [label="PowerLoss"];
+aboveshoe [label="Drillbit is above\ncasing shoe"];
+slightbelowshoe [label="Drillbit is less\nthan one stand\nbelow casing shoe"];
+deepinopenhole [label="Drillbit is more\nthan one stand\nabove bottom hole"];
+atbottom [label="Drillbit is less\nthan one stand\nfrom bottom hole"];
+packoffdetect [label="Pack-off detected"];
+updown [label="continuously move\nstand up\nand down"]
+stop [label="reduce speed to\n zero following\na curve"]
+pullout [label="Pull out as much\nas possible"]
+halfstand [label="elevate or lower\n to half a stand\n above drillfloor"]
+inslips [label="Activate\nIn-Slips\nsequence"]
+poweron [label="Power\nreturns"]
+holeclean [label="detect clean hole"]
+largekick [label="large kick detected",shape=diamond]
+topdrive [label="Topdrive connected",shape=diamond]
+mudpump [label="Mudpump connected", shape=diamond]
+pressure [label="detect stable\nmud pressure", shape=diamond]
+  subgraph cluster_1 {
+    aboveshoe;
+    slightbelowshoe;
+    deepinopenhole;
+    atbottom;
+  }
+  start -> powerloss ;
+  powerloss -> aboveshoe ;
+  powerloss -> slightbelowshoe -> "Pull up until\nabove casing shoe" -> stop;
+  powerloss -> deepinopenhole ;
+  powerloss -> atbottom ;
+  aboveshoe -> stop -> inslips;
+  atbottom -> pullout -> updown;
+  pullout -> packoffdetect;
+  deepinopenhole -> halfstand;
+  halfstand -> updown;
+  updown -> poweron;
+  inslips -> poweron;
+  subgraph cluster_0 {
+    updown -> topdrive -> "rotate as per\ncurve"
+    updown -> mudpump-> "pump as per\ncurve"
+  }
+  packoffdetect -> pressure -> "increase mud flow\nrate" -> holeclean;
+  pressure -> "stop pump (curve)" -> "Stuck pipe"
+  holeclean -> pullout;
+  updown -> largekick -> "Activate BOP";
+  updown -> "small kick detected" -> updown;
+}
+}}}