The M&M Hydrostatic Bailer operates with differential pressure created by the fluid column in the well, and dry tubing above the main valve. The valve mechanism is spring loaded, and opens when the string is lowered and comes in contact with fill and closes when string is lifted of of fill. The bailer will continue to operate in this manner until differential pressure has been equalized or until the chamber below the bleeder valve has been filled. The bailer also comes complete with a knock out sub, it is ran above the main valve and is fitted with a brass plug that can be sheared by dropping a steel bar in the tubing at surface. This will allow the tubing to be retrieved dry if the bailer becomes plugged with debris.

Before running the bailer, calculate the amount of sand to be recovered. You will need to run enough chamber between the flapper valve and the main valve to hold twice this amount.

Example: If you have 6 barrels of sand to pick up and you're running the bailer on 2-7/8" 6.5# work string, you would need to run approx. 2,073' of fill chamber.

                                 172.76 Ft / Barrel
                                    x  12 Barrels
                          -----------------------------
                              2,073.12 Of Fill Chamber

When running bailer make up and trip in hole with the following bottom to top procedure. Flapper valve with mule shoe, fill chamber, main bailer with knock out sub, tubing to surface. Lower down and tag top of fill, slack off fast 5 to 6' and then pick up fast. Wait approx. 1 minute before slacking off again. This will allow for fill to fall back into the void you have created rather than just coring through the fill and possibly sticking the string. When all fill has been recovered or chamber is full, trip out of the hole and empty fill chamber.
Note: Bailer will stop working when chamber is full

If another trip with bailer is necessary, the bailer can be quickly dressed in the field by making only 2 breaks. First break spring housing below packer barrel and remove valve assembly. Check rubber seal for scarring. If seal is intact, it may be flipped over and run again. Reassemble as before. Next break spline housing above packer barrel, pull back on top section to expose push rod. Clean push rod and apply light grease. Check tension on packing by inserting push rod back into packer barrel. You should feel moderate tension when pushing and pulling by hand, more tension can be applied to packing with the adjustable packing nut. If more packing is needed, do not remove existing packing, unscrew packing nut and add another packing ring and replace packing nut and adjust as nessesary. Re assemble bailer and tighten connections.

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