Lifting-lowering mechanically operated test tools, catalog page 47
Hydraulic Locking Joint
Hydrostatic hold-down that keeps the packer set while the tester is cycled
Description
The hydraulic locking joint is a separate locking system for cased-hole testing and is connected directly below the tester. After the packer is set, the tester is operated by lifting and lowering the string, and lifting could unset the packer. Hydrostatic pressure acting on the hydraulic area of the locking joint produces an upward force against the tester and a downward locking force — equivalent to adding drill collars above the packer — so that the packer stays set.
Options
Mandrels and sealing sleeves are available with different hydraulic locking areas:
- 3 3/4-in tool: 0.25, 0.5, 1.0 and 1.5 in²
- 5-in tool: 0.5, 1.0, 1.5 and 2.0 in²
