The WOODCO USA IBOP should give long, trouble-free service. To assure this, follow these steps:

After each use flush the IBOP with clean water. Do this by removing the release tool assembly and using the release rod to depress the dart while washing from the box end with a pressure hose.

After removal of all traces of drilling mud, etc., stand the IBOP on its pin end and pour a cup of clean lubricating oil onto the closed dart See Figure 4.)

Figure 4

Then lean the IBOP over at a 45 degree angle and slightly depress the dart with the release rod, allowing the oil to run through the IBOP (See Figure 5).

As soon as the oil passes below the dart, lay the IBOP on its side and roll it to coat the internal area and the dart with oil.
(See Figure 6).

Then, clean and dope the connections, and replace the pin thread protector. Coat the release rod with oil and re-install it into the release tool assembly. Clean and dope the threads of the release tool. Remove, dope, and re-install the release rod lockscrew (See Figure 1 for illustration of parts and their relationship to one another).

Install the release tool assembly into the box connection of the IBOP making the entire unit ready to test and place in service when necessary.