HMFT^™ Multiconductor Jar

Applications

• Open hole
• Wireline logging

Features and Benefits

• Purely mechanical wireline jar is shorter and lighter than the hydraulic equivalent
• Weight-forward design ensures relatching under jar’s own weight
• Repeatable, instant, and unlimited continual firing downhole
• Eliminates redress after each run, even when activated
• Adjustable firing setting while still in the string

Tool Description

The Weatherford HMFT multiconductor jar is a multiconductor openhole wireline jar for use in extreme applications that helps prevent stuck toolstrings and expensive fishing operations.

Ultrareliable and unaffected by temperature or pressure, the HMFT jar provides instant and unlimited activations, with no potentially critical time delays. The jar activates as soon as wireline tension exceeds the predetermined setting and applies a powerful impulse to the stuck toolstring. The simple operation of the patented design enables the operator to reset the jar under its own weight for additional, unlimited activations.

The internal electrical and mechanical components of the HMFT jar are sealed and protected from wellbore fluids by an oil-filled pressure and temperature-compensation system that compensates for changes in internal fluid volume due to pressure-induced compression and temperature-induced expansion. Isolation of internal components from wellbore fluids allows for extended run time with minimal preventative maintenance and decreased frequency of full-service maintenance, reducing operating costs.

Proprietary jar-setting software models downhole dynamics so the operator can dial in the jar settings for the unique conditions of each well. Impact ratios and activation forces can be optimized to suit particular job requirements and the jar adjusted accordingly.

On long-term rental, Weatherford can train customer personnel on best practices for running and maintaining the tools, making prolonged use more economical.

Specifications