The pre-job safety meeting at a wellsite should involve all parties who will be affected by
the work that Weatherford is about to perform. This would include but is not be limited to:
company men, rig pusher, rig crew, crane operators and other third parties working on the
same location.
Minutes of the pre-job safety meeting should be recorded and the record of the meeting
included as part of the end-of-job report. All parties who attend the meeting should
acknowledge their attendance by signing the meeting minutes.
Shift handover meetings must be held at the time of the shift change to ensure the shift
coming on duty knows what is going on and what has changed from the last shift.
During this handover the “sequence of operations”, detailing what has transpired during the
last shift, will be reviewed so that all parties are aware of what has happened previously.
The shift supervisor will then adopt the responsibility for updating the sequence of
operations and keeping it current with ongoing activities during the shift.
HAZOP/HAZID
· HAZOP - Hazard Operability
· HAZID - Hazard Identification
A HAZOP/HAZID study makes a critical examination of the process and the engineering
outcomes of the process. The aim is to assess the hazard potential arising from incorrect
operation of equipment or processes, and the consequential effects on the facility as a
whole. By performing this detailed study, it is possible to identify and remediate the process
or equipment, which may have failed when the process or equipment was in service.
The HAZOP/HAZID looks at the potential for failure of plant and equipment as well as the
potential for human and process errors. By identifying and mitigating these risks, the
process will be safer and more reliable.
Permit-to-Work (PTW)
The permit-to-work (PTW) process is a process which is designed to monitor, control and
coordinate the activities of several contractors working concurrently on a wellsite. Permits
are issued by a permit controller who works with the parties involved to draw up the permit
and identify the hazards and necessary actions to mitigate the hazards.
The PTW requires that all parties involved acknowledge that they are aware of the activities
of others and that they will limit their actions to ensure that anything they do cannot have a
detrimental or consequential effect on the action of others or to the plant or process.
An example of when a PTW is required is when, on a production platform, a wellhead has to
be removed for repair or maintenance. The permit would identify what has to be done to
stop the flow of the well and secure the well behind a minimum of two barriers. The permit
also identifies who performs this task.
To safeguard the people who work on the wellhead, the production operation crews will
lockout/tagout the well so that no flow can come from either the well or back from the