GENERAL SAFETY

Slickline Operations with Wellhead Pressure require operations and well maintained equipment. A Slickline job under pressure, especially with the presence of gas, needs careful preparation and equipment adapted to the job to be performed.

High-pressure jobs require also close co-operation between the rig crew and Additional Oilfield Services Limited Personnel.

A perfect understanding of all operational steps, possible hazards and any emergency shut-in procedures is a pre-requisite for all pressure jobs and should be discussed on the spot with the client before hand.

PERSONNEL SAFETY       

Always wear your safety equipment when working on Pressure Control Equipment (boots, hard hat, overall, gloves, goggles).

Also, any operation on the wellhead and associated equipment (disconnection, actuation of BOP or valve. etc) must be watched by an operator or someone from the rig crew, ready for emergency action.

Make sure that nobody is standing downwind.

Crew working in isolated locations must always carry a FIRST AID KIT.

SAFE PROCEDURES

WELL SITE

- NO SMOKING is allowed on or near the well site.

- Clear the way to the X-Mass tree or wellhead. Handling heavy equipment can be       hazardous if the ground is littered with loose boards, scans of oil field equipment, mud filled holes
-  DO NOT JUMP FROM PLATFORM, use the stairs and ladders.

-  When working above water, wear your LIFE JACKET

-  Take care where you place your feet when climbing the X-Mass tree.

-  Do not grasp any part of the tree, which is not firmly secured. (Valve handles, …etc.)

-  Should night be foreseen, take the appropriate steps to ensure PROPER
LIGHTING                                                                                                                          

TOOLS

-  Keep all hammers, Chisels, punches, etc in perfect condition.

-  Do not use a steel sledge hammer to tighten connections (A BRASS HAMMER is a   must.

                                                                 
SURFACE RIG UP                                                                                     
                                                                                                                                       Whenever possible, do not install the Slick Line Unit Downwind                                            

-  Working pressure of the surface equipment should be selected to suit the well head shut-in Pressure and the nature of effluent.

-  Carefully watch the WP of the crossover between the wellhead and BOP.

-  Always have pressure gauge in your tool box (range > WHSIP)

-  Check the oil level, diesel of the slick line unit before each operation.

-  Always in sight of each other

-  When running a slick line job, always have a CLEAR VIEW OF THE STUFFING
BOX

-  Always secure the winch on platform or deck on which it is installed

-  Never run in a well with the winch ENGINE STOPPED

-  When coming out of the hole, use the winch relief valve

-  Make sure you position the lifting equipment properly

-  Always make sure that the pressure has been BLED OFF to zero before attempting to unscrew the union at the top of the swab valve

-  The B.O.P. should always be PRESSURE TESTED before each job.  When using stranded line, leaks will develop around 2500psi, use a flush of the same OD.

-  Do not climb or let anyone else climb lubricator whenever it is under pressure, use the remote control stuffing box tightening device 

-  When rigging up and down lubricator, NEVER STAY BELOW it. Always use the slick line clamp

-  The hay pulley must be attached to the wellhead in such a way that the slick line between the stuffing box and the hay pulley is PARALLEL TO THE LUBRICATOR.

-  Always open up a well SLOWLY until the lubricator is pressurized. The lower master valve should be opened first (if closed), then the upper master valve and the swab valve.

-  To close in the well, proceed in the reverse way

-  Never attempt to remove the lubricator without first BLEEDING OFF THE PRESSURE, operate the needle valve of the lubricator several times to ensure it is not PLUGGED WITH ICE

-  Make sure that the WHOLE SLICKLINE STRING is in the lubricator before closing the swab valve

SLICKLINE

-  When working in H2S, use the proper cable and INHIBIT the wire (kontol, No rust) by means of a liquid chamber

-  When cutting on surface (rig down) make sure that neither end can fly out

-  Keep track of the number of the hours the wire has worked.
CHANGE IT BEFORE IT IS TOO LATE. Check it frequently for defects or corrosion, between each job, cut and remove 10ft of wire. Do this more frequently during fishing jobs requiring heavy jarring.

-  When leaving the slick line string in hole (pressure surveys) put RAGS on the wire between wellhead and winch to prevent people and vehicle from hitting the wire

-  Make sure before running in the well that there is enough wire on the drum to reach the total depth.

SLICKLINE OPERATIONS

Always WRITE DOWN the length and OD of the different components and the slick line string prior to the running-in in the well

- When breaking down the slick line string, put the wrench about 5ft from either side of the breaking joint to prevent the FINGERS FROM BEING HURT.

-  It is standard practice to run gauge cutter or sinker bars first of all 

-  When running for the first time, always CHECK the WEIGHT frequently

-  Before attempting a fishing job, check that the lubricator is LONG ENOUGH to handle both lost string

-  When leaving slick line string in hole (Survey Gauges) do not forget to clamp the wire

-  Select the right size of slick line string versus tubing ID to make sure it can be fish

-  If you clean or grease the cable while pulling out. Make sure your hand is far away from the hay pulley or measuring device.