Drill String Weight Calc

Hook Load & Buoyancy Tool

$4.99 · Designed for iPad. Not verified for macOS.

5-inch pipe, 600ft of collars, 12 ppg mud - hook load picking off bottom? String weight in air and buoyed, hook load with and without WOB. $4.99 one-time, no login. Need to know your hook load before picking up off bottom? Drill String Weight Calc gives you total string weight, buoyed weight, and hook load with and without WOB — so you can verify rig capacity and plan your BHA. Enter drill pipe size and length, HWDP length and weight, drill collar size and length, mud weight, block weight, and target WOB. Get complete string weight analysis in air and in mud. STRING WEIGHT (AIR): - Drill pipe weight from built-in size/weight table - Heavy weight drill pipe (HWDP) contribution - Drill collar weight from collar OD selection - Total string weight in air BUOYED WEIGHT: - Buoyancy factor from mud weight (ppg) - Total buoyed string weight in mud - Individual component buoyed weights HOOK LOAD: - Hook load without WOB (string + block + equipment) - Hook load with WOB applied - Block and traveling equipment weight included WOB ANALYSIS: - Target WOB vs available drill collar weight - Pass/fail check: are collars heavy enough for your WOB? - Prevents running drill pipe in compression DRILL PIPE DATABASE: - Sizes: 2-7/8" through 6-5/8" - Nominal weights per API standards - Drill collars: 4-3/4" through 9-1/2" Built for drilling engineers, rig supervisors, and directional drillers. Works completely offline — no internet required.

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Version 1.0.2

The developer, Shanghai Sheyuan Network Technology Co., Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Information

    Seller
    • Shanghai Sheyuan Network Technology Co., Ltd.
    Size
    • 1.1 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Sheyuan Inc.
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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