Patent Number: 8,794,932

Title: Hydraulic lift device

Abstract: Systems and methods for providing a hydraulic lift device for use in producing a subterranean well. In some cases, the hydraulic lift device includes a hydraulic cylinder having a first cylindrical sleeve slidably coupled to a second cylindrical sleeve, wherein the first and second sleeves define a hollow channel to accommodate passage of a polished rod. In some cases, the first cylindrical sleeve includes a surface for securing a portion of the polished rod. Additionally, in some cases, the lift device includes a port in fluid communication with the hollow channel, wherein the port is configured to receive an inlet line from a hydraulic pump. In some cases, the lift device also includes a guidance system disposed at least partially outside the hydraulic cylinder, wherein the guidance system is configured to prevent axial rotation of the first cylindrical sleeve with resect to the second cylindrical sleeve. Other implementations are described.

Inventors: Rogers; Tracy (Aztec, NM), Montoya; Matt (Blanco, NM), Crosby; Curtis (Farmington, NM)

Assignee: Sooner B & B Inc.

International Classification: F04B 47/04 (20060101); F04B 49/12 (20060101)

Expiration Date: 8/05/12018