MHW74 Series Hydraulic Wirecutting Actuator | Schlumberger Products

MHW74 Series

Hydraulic wirecutting actuators

Our portfolio of Saf-T-Gard actuators includes the MHW74 hydraulic wirecutting actuator, which is used in the master run of the tree on a reverse acting gate valve. It incorporates features from our field-proven products, combined with our industry-leading, innovative technology. Particular attention has been given to safety and ease of maintenance.

The MHW hydraulic wirecutting actuator series is designed to provide additional well shut-in protection during wireline operations. When wireline complications occur and the well shut-in procedure is recommended, the hydraulic wirecutting actuator will provide a closing force to shear 0.108 in of wireline or 7/32 in of braided line to safely shut in the well.

Advantages

  • Superior piston design
  • Visual piston indicator
  • Spring system
  • Fail-safe close design
  • Corrosion-resistant materials
  • Nonpressurized actuator housing
  • Ease of maintenance
  • Permanent drift setting
  • Drain plugs flush housing
Saf-T-Gard Hydraulic Actuator - MH74 Series

Specifications

  • Model: MHW74
  • Series: 7000
  • Specific application sizing: 1 13/16 through 5 1/8 in
  • API Classification: Spec 6A, 17th Edition, SSV
  • Trim for retained fluid components: Same as valve and bonnet specification
  • PR-1 and PR-2: Appendix F 2.5
  • Maximum operating pressure: 6,000 psi [414 bar]
  • Relief device setting: 6,000 psi [414 bar]
  • Test pressure: 9,000 psi [621 bar]
  • Trim for standard components: AA
  • PSL: Retained fluid; 1, 2, 3
  • Operating Temperature: –20 to 250 degF [–29 to 138 degC]
Model Piston Size
Valve Size, in
Valve Pressure, psi
Crack-Open Pressure, psi
Hold-Open Pressure, psi
Swept Volume, in3
Weight, lbm [kg]
MHW7402 Single-piston hydraulic wirecutter with 4-in piston
2 1/16 5,000 1,734 1,652 28 521 [236]
10,000 2,616 2,202 28 526 [239]
2 9/16 5,000 2,023 1,839 34 521 [236]
10,000 3,195 2,503 34 531 [241]
MHW7403 Single-piston hydraulic wirecutter with 4-in piston
3 1/8 5,000 2,335 2,040 41 521 [236]
3 1/16 10,000 3,817 2,830 41 531 [241]
MHW7404 Single-piston hydraulic wirecutter with 4-in piston 4 1/8 5,000 3,196 2,613 52 521 [236]
4 1/16 10,000 5,538 3,788 52 531 [241]
MHW7405 Single-piston hydraulic wirecutter with 4-in piston 5 1/8 5,000 4,458 3,465 62 521 [236]
 

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