Patent attributes
A plunger for a gas well including an elongate body having a first end and a second end. A sleeve overlying the body. The sleeve being shorter in length than the elongate body and is axially moveable between the first end and the second end of the body. At least one circumferential seal on the exterior surface of the sleeve, thereby providing a barrier to the passage of fluids along the exterior surface of the sleeve. At least one fluid flow passage is provided through the sleeve. A first axial stop is provided at the first end of the body and a second axial stop is provided at the second end of the body to limit axial movement of the sleeve. The second axial stop having sealing shoulders which engage the second end of the sleeve to close off the at least one fluid flow passage.
