HMFT™ Multiconductor Jar


Deploys in extreme applications to prevent stuck toolstrings and expensive fishing operations 


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

 

HMFT - DITS

HMFT - HOSTILE

Number of conductors

19

21

Outside Diameter

3.375 in. (85.73 mm)

Thread connection

3.625 in. (92.07 mm)

2.75 in. (69.85 mm)

Maximum temperature

400°F (200°C)

500°F (260°C)

Maximum pressure

25,000 psi (172.4 MPa)

30,000 psi (206.8 MPa)

Length (closed)

111 in. (2.82 m)

Length (open)

117 in. (2.97 m)

Weight

210 lb (95.25 kg)

Power stroke

5.10 in. (129.5 mm)

Voltage rating

1,000 V

Minimum setting

1,000 lb (453 kg)

Maximum setting

10,000 lb (4,535 kg)

Maximum tensile pull

120,000 lb (54,431 kg)

HMFT Multiconductor Jar

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