Hydril Kellyguard

Proven Valve Reliability and Durability

The original one-piece Kellyguard valve from Hydril Pressure Control services both traditional and top-drive drill stem valve applications. In addition, we offer Hydril OEM-designed and developed NACE Trim Kellyguard valves for normal and corrosive drilling environments. These valves are high-quality, low-maintenance products with a long service life. Additionally, the valves include:

  • A metal-to-metal ball-to-seat seal that is effective in low or high pressure.
  • Stainless steel internal parts standard.
  • A primary seal created by well pressure.
  • Pressure balancing that significantly reduces the operating torque necessary to open the valve at high pressure.
  • A downward pressure seal for effective low-pressure sealing when used as a mud saver.
  • A replaceable operating crank sleeve that protects the body from unnecessary wear to extend life and reduce costs.
  • Meets Class II external pressure requirements.
  • Meets API Spec 7.

Selected Engineering Data*

Valve Size ID Weight Hex Wrench Connection OD Length
in. in. lbs. in. in. in.
3 1 3/4 53 1/2 NC31 (2 7/8 IF) 4.25 16.5
3 1 3/4 69 1/2 NC38 (3 1/2 IF) 4.25 16.06
3 1 3/4 59 1/2 3 1/2 EUE 8R 4.25 15.5
3 1 3/4 59 1/2 2 7/8 EUE 8R 4.25 16.6
3 1 3/4 69 1/2 WT38 4.75 16.5
3 1 3/4 1/2 NC38 (3 1/2 IF) 4.75 25
3 1 3/4 1/2 XT39 5 15.51
3 1/2 2 1/4 80 5/8 NC38 (3 1/2 IF) 5.38 18.06
3 1/2 2 1/4 115 5/8 4 1/2 FH 6.13 18.06
3 1/2 2 1/4 135 5/8 NC50 (4 1/2 IF) 6.38 17.56
3 1/2 2 1/4 120 5/8 NC46 (4 IF) 6.13 17.56
3 1/2 2 1/4 115 5/8 4 1/2 REG LH 6.13 17.82
3 1/2 2 1/4 80 5/8 NC40 (4" FH) 5.38 17.56
3 1/2 2 1/4 5/8 NC38 SHORT 5.38 15.5
3 1/2 2 1/4 5/8 WT 40 5.38 18.06
3 1/2 2 1/4 5/8 DS50 6.38 17.56
4 1/4 2 13/16 130 7/8 NC46 (4 IF) 6.63 20.06
4 1/4 2 13/16 134 7/8 NC50 (4 1/2 IF) 6.63 20.06
4 1/4 2 13/16 228 7/8 5 1/2 IF 7.75 19.56
4 1/4 2 13/16 215 7/8 6 5/8 REG LH 7.75 19.56
4 1/4 2 13/16 117 7/8 NC50 SHORT 6.63 15.75
4 1/4 2 13/16 7/8 NC50 LONG 6.63 33.06
4 1/4 2 13/16 7/8 HT55 (400) 7 20.06
5 1/4 3 1/16 180 7/8 NC50 RH 7.38 20.06
5 1/4 3 1/16 192 7/8 5 1/2 FH 7.38 19.56
5 1/4 3 1/16 188 7/8 NC56 7.38 19.56
5 1/4 3 1/16 218 7/8 5 1/2 IF 7.75 19.56
5 1/4 3 1/16 218 7/8 6 5/8 REG LH 7.75 19.56
5 1/4 3 1/16 7/8 6 5/8 REG RH 7.88 19.56
5 1/4 3 1/16 140 7/8 6 5/8 REG RH SHORT 7.38 15.81
5 1/4 3 1/16 205 7/8 6 5/8 FH 8 19.56
5 1/4 3 1/16 270 7/8 7 5/8 REG RH 8.63 16.56
5 1/4 3 1/16 7/8 5 1/2 FH DSTJ pin X WT50 box 7.38 19.56
5 1/4 3 1/16 7/8 XT57 7.38 16.25

*See brochure for additional data

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