Most solid-body plungers rely on close contact between the plunger & the tubing wall to minimize slippage past the plunger. Our ported tools (including Vipers & Venturi Vipers) rely instead on a turbulent gas seal between the plunger & the tubing wall. The tangential ports feed gas from the plunger core into turbulent gas seal area, in the form of gas jets. These have an added benefit: Once the plunger starts to move, they impart a torque on the tool, which causes it to spin. The resulting turbulent gas seal is therefore effective at inclinations far beyond the reach of non-ported tools. Other resulting benefits of the induced spin include even wear of the tool; preventing flat spots; & extending run-time.
Many operators with wells in the Codell, Cotton Valley, Haynesville, Marcellus, Mesa Verde, Niobrara, STACK, Turner, Utica, Wolf-Camp, & others have, therefore, been able to make use of these tools at inclinations in excess of 70o. In doing so, they have therefore been able to reduce the hydrostatic head on their horizontal completions by 100’s of feet!