20150128230329_safety Bulletin - 77 2014 Q4 Ef - Brake Band Failure.pdf
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SAFETY BULLETIN #
77.2014.Q4.EF
DESCRIPTION
INCIDENT DATE
OCTOBER 26 2014
BRAKE BAND FAILURE CIRCUMSTANCES / EVENTS
On Oct 26, 2014 @ 2000hrs, the crew was drilling and was @ 3582m. The driller was hoisting the drill string before the next connection, when he went to apply the brakes and the brake handle fell down to his knee level. At that point there was no one on the floor except the driller, he immediately stopped the drill string and chained down the brake handle. He notified the Rig Manager, who immediately came to the floor and the crew had removed the guards from the drawworks, upon inspection he observed a broken brake band on the off-drillers side and driller side was cracked. Rig Manager immediately notified the Field Superindentent, and new brake bands were dispatched by hot shot to location. During that time the crew removed the old brake bands, and prepared the drawworks to reinstall the new brake bands. Once the new bands arrived they were installed on the drawworks and tested and adjusted before continuing operations. During the remainder of shift, the crew checked the bands every hour to ensure everything was ok. New certifications were received the next morning for the brake bands.
ROOT CAUSE
Structural failure of the brake band material causing cracking, and eventual breaking. Additional results pending 3rd party inspection.
CORRECTIVE ACTION
ASSIGNED TO
1) Continue weekly & pre-spud inspection of braking system and drawworks. Drillers should notify Rig Managers of any abnormal sounds or characteristics of the hoisting equipment. Rig Managers must ensure reports on abnormal operating conditions are investigated thoroughly and reported to Field Superintendent.
1) ALL RIGS
RISK ASSESSMENT Reference process below.
FREQUENCY PROBABILITY SEVERITY
4 1 4
OVERALL RISK CLASSIFICATION
16
THIS IS A PRIVILEGED AND CONFIDENTIAL COMMUNICATIONFOR THE PURPOSES OF PROVIDING LEGAL ADVICE AND MADE IN CONTEMPLATIONOF LITIGATION. THIS REPORT MAY ONLY BE REVIEWED BY THE PARTY TO WHOM IT IS ADDRESSED AND MAY NOT BE DISSEMINATED TO OR RELIED UPON BY ANY THIRD PARTY WITHOUT THE EXPRESS WRITTEN CONSENT OF CHINOOK DRILLING, A DIVISION OF TOTAL ENERGY SERVICES.
77.2014.Q4.EF
DESCRIPTION
INCIDENT DATE
OCTOBER 26 2014
BRAKE BAND FAILURE CIRCUMSTANCES / EVENTS
On Oct 26, 2014 @ 2000hrs, the crew was drilling and was @ 3582m. The driller was hoisting the drill string before the next connection, when he went to apply the brakes and the brake handle fell down to his knee level. At that point there was no one on the floor except the driller, he immediately stopped the drill string and chained down the brake handle. He notified the Rig Manager, who immediately came to the floor and the crew had removed the guards from the drawworks, upon inspection he observed a broken brake band on the off-drillers side and driller side was cracked. Rig Manager immediately notified the Field Superindentent, and new brake bands were dispatched by hot shot to location. During that time the crew removed the old brake bands, and prepared the drawworks to reinstall the new brake bands. Once the new bands arrived they were installed on the drawworks and tested and adjusted before continuing operations. During the remainder of shift, the crew checked the bands every hour to ensure everything was ok. New certifications were received the next morning for the brake bands.
ROOT CAUSE
Structural failure of the brake band material causing cracking, and eventual breaking. Additional results pending 3rd party inspection.
CORRECTIVE ACTION
ASSIGNED TO
1) Continue weekly & pre-spud inspection of braking system and drawworks. Drillers should notify Rig Managers of any abnormal sounds or characteristics of the hoisting equipment. Rig Managers must ensure reports on abnormal operating conditions are investigated thoroughly and reported to Field Superintendent.
1) ALL RIGS
RISK ASSESSMENT Reference process below.
FREQUENCY PROBABILITY SEVERITY
4 1 4
OVERALL RISK CLASSIFICATION
16
THIS IS A PRIVILEGED AND CONFIDENTIAL COMMUNICATIONFOR THE PURPOSES OF PROVIDING LEGAL ADVICE AND MADE IN CONTEMPLATIONOF LITIGATION. THIS REPORT MAY ONLY BE REVIEWED BY THE PARTY TO WHOM IT IS ADDRESSED AND MAY NOT BE DISSEMINATED TO OR RELIED UPON BY ANY THIRD PARTY WITHOUT THE EXPRESS WRITTEN CONSENT OF CHINOOK DRILLING, A DIVISION OF TOTAL ENERGY SERVICES.
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