Harbison-Fischer offers three types of Tubing Drains: the Sleeve Type, the Spoon Bill and the J-Slot Tubing Drain.
The Harbison-Fischer Sleeve Type Tubing Drain can be used with either style of Oversize Tubing Pump. It is installed on top of the pump and is actuated by pulling the plunger up against the bottom of the drain before pulling the tubing. The fluid in the tubing is drained through holes in the external shoe that are uncovered when the sleeve is pushed upward.
The J-Slot Tubing Drain is also a popular choice due to its use with common API pumps. It is used with a special Harbison-Fischer On-Off Tool that has lugs machined onto two sides of the lower key. These lugs latch into the J-Slot when the plunger and standing valve are pulled up into the drain extension above the pump barrel. The larger inside diameter of the drain extension allows the fluid in the tubing to drain around the plunger and standing valve and out the bottom of the tubing.
The Spoon Bill Tubing Drain can also be used with either style of Oversize Tubing Pump. When the operator is ready to drain the tubing, the sucker rods are lowered until the traveling and standing valves are closed. The "bill" attached to the traveling valve functions as a probe to push the standing valve ball off its seat to the side, while the vertical rod on the standing valve pushes upward on the traveling valve ball to hold it off its seat. The fluid in the tubing flows downward through both valves and out the bottom of the pump. The Harbison-Fischer Spoon Bill Tubing Drain can also be used for "huff and puff" steaming of formations since the valves can be opened to allow steam to be injected down the tubing to the formation. After steaming, the sucker rod string is lifted to resume pumping and the standing and traveling valve balls return to their positions on their seats. The cages of the Spoon Bill Tubing Drain can be specified for corrosion resistance or heavy pumping conditions.
