Bop Drill 73231j

BOP DRILL (Ref. OISD/Std-174/8) Drills and Training I.

The competence with which drilling personnel respond to well control situations and follow correct procedures can be improved by carrying out emergency drills.

II.

While drilling in H2S / sour gas prone area, detectors shall be installed and breathing apparatus in sufficient quantity and cascade system shall be made available. Crew shall be trained to handle situations in this environment.

III.

Organization should assign specific responsibilities to the identified / designated persons, for actions required during an emergency related to well control, which would be part of rig ERP. a. Following drills should be performed: i. Pit drill ii. Trip drill b. To conduct drill, a kick should be simulated by manipulating primary kick indicator such as the pit level indicator or the flow line indicator by raising its float gradually and checking for the alarm. c. The reaction time from float raising to the designated crew member's readiness to start the closing procedure should be recorded and response time should not be more than 60 seconds. d. Total time taken to complete the drill should be recorded and it should not be more than 2 minutes. e. Drill should be initiated without prior warning during routine operation. f.

Drill should be conducted once a week with each crew.

g. Drill should be initiated at unscheduled times when operations and hole condition permits.

8.1 Pit Drill (On bottom) I.

Raise alarm by raising mud tank float -automatic or oral.

II.

Stop drilling / other operation in progress.

III.

Position tool t for BOPs’ ram closing.

IV.

Stop mud pump

V. VI. VII. VIII.

Secure brake During / after the above steps, as applicable, designated crew should move to assigned positions Check for self flow Record the response time.

Trip Drill (Drill Pipe in BOP) I. II. III.

Give signal by raising alarm. Position tool t above rotary and set the pipe on slips Install full opening safety valve in open position.

IV. V.

Close FOSV after installation. Designated crew should move to assigned position, during / after the above steps, as applicable.

VI. VII.

Close BOP. Record response time.

Note: Trip drill should be carried out preferably when bit is inside the casing. A full opening safety valve for each size and type of connection in the string shall be available on derrick floor, in open position. Safety valves may be clearly marked for size and connection.

Trip Drill (Collar in Blowout Preventer) I. II. III.

Give signal by raising alarm. Position upper drill collar box at rotary table and set it on slips. Connect a drill pipe t or stand of drill pipe on drill collar tool t with change over sub and position drill pipe in BOP.

IV. V. VI. VII.

Install FOSV in open position. Close FOSV. Close BOP. Record response time.

Note: Under actual kick conditions (other than drills) if only one stand of drill collar remains in the hole it would be probably faster to simply pull the last stand and close the blind ram. If numbers of drill collar stands are more and well condition does not permit step III than install FOSV with change over sub on drill collar, close it and close annular preventer. Preparation for step III above should be done in advance prior to starting pull out of drill collar - make one single / stand of drill pipe with drill collar change over sub.

Trip Drill (String is out of Hole) I. Give signal by raising alarm. II. Close blind/ blind-shear ram. III. Record response time.