The VAN RUTH^® CW PLUG (CW) is a highly effective bridge plug for spot cementing sections of drill holes, wedging in off bottom situations and for branch hole operations.

The CW PLUG is placed by pumping through the drill string and locks in the drill hole upon leaving the rods. The cup on top provides a seal on the drill hole.

Spot Cementing: To provide a bridge for spot cementing the CW PLUG is inserted and pumped down an open rod string with either cement or water depending on the intended use. Spring loaded slips grab the wall of the drill hole upon leaving the rod string and the tapers of the plug body and slips lock the plug in location. A high pump pressure reading and relief valve discharge indicates the plug has locked in the drill hole with the upper portion of the plug still in the rods. Slowly raising the rods while maintaining a positive fluid pressure will complete the setting process. A drop to open hole pressure indicates the plug has left the rods and is ready for operations to follow. Multiple CW PLUGs can be set with a single pull of rods out of the hole. As only one rod trip is required no time is lost due to tripping the rods. The time savings using this method are considerable. The CW PLUG may be drilled out after cementing if required.

Wedging: For branch hole or wedging with Hall-Rowe type wedges, the CW PLUG is inserted and pumped down to required location with water and set as above. A wooden plug is placed on top of the CW PLUG and the wedge is lowered and set in position before the wooden plug has time to expand, the wedge is then cemented in to prevent vibration and branch hole drilling operations can commence.

**Do not lower the rod string back down on the plug in either situation as this will damage the plug and/or become stuck in the rods and pulled up hole**

A vented hoisting plug should be used while withdrawing the rod string with the rods being withdrawn at moderate speeds only. Suction above the CW PLUG may have a tendency to pull it up the hole. This effect is further increased if grease or soft sections in the hole seal against the rod string.

For the same application but where the hole is making water please see the CWBP.

Construction: Drillable aluminium and rubber, Also available in non spark material illustrated above in black. Material Data Safety Sheets (MSDS) available upon request.