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Pulling Head or Grip

OSP Map · HDD Bore

Pulling Head or Grip

Fitting that connects the pullback string to the conduit or conduit bundle.

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HDD Bore. Schematic, not to scale. Clearances, depths and separations follow NESC, state law and owner specifications.

Keynote 1Locate Marks: Flags and Paint
Keynote 2Tolerance Zone at the Gas Main
Keynote 3Potholes, with a Spotter
Keynote 4Underground Power
Keynote 5Gas Main
Keynote 6Water Main
Keynote 7Sewer
Keynote 8HDD Rig with Strike Protection
Keynote 9Entry Pit
Keynote 10Drilling Fluid and Returns
Keynote 11Planned and Actual Bore Path
Keynote 12Drill Rods
Keynote 13Drill Head and Sonde
Keynote 14Walkover Locator Operator
Keynote 15Exit Pit
Keynote 16Conduit Reels and Trailer
Keynote 17Backreamer
Keynote 18Swivel
Keynote 19Breakaway Link
Keynote 20Pulling Head on the Bundle

Equipment

Pulling Head or Grip

Layer:: Equipment
Views:: HDD Bore
Also Called:: Pulling Grip, Pulling Eye, Duct Puller

What It Is

The fitting at the very end of the pullback string that grips the conduit or bundle and seals its ends. It attaches behind the breakaway link.

Why It Matters

A good pulling head carries the pull into the conduit without slipping and keeps drilling fluid and soil out of the duct. A packed duct must be cleaned or re-bored before cable can go in.

For a conduit bundle, do not assume each conduit takes an equal share of the pull. Ask the pulling-head and conduit manufacturers how the head or harness loads each conduit; if they give no written answer, rate the breakaway link as UG-07 step 4 says. PPI recommends a staggered pulling harness with a breakaway swivel when you pull several conduits (Handbook of PE Pipe, Ch. 14). In a staggered harness the conduit ends are offset in length, so the grips do not bunch up in one spot.

Materials and Specs

Pulling head or grip sized to the conduit or bundle, per manufacturer
For several conduits, the pulling harness the manufacturers specify

Inspect For

Head matched to the conduit size and count
Every duct end sealed so mud and fluid stay out
Secure connection to the breakaway link

Common Mistakes

Open duct ends that pack with mud during pullback
A grip that slips off the duct
Assuming the head shares a bundle’s pull evenly across the conduits

SOP Steps

UG-07 Reaming and Pullback

Glossary

Pulling Head
Pullback
Conduit Bundle

FAHMY is a reference, not a substitute for owner specifications, the authority having jurisdiction, manufacturer instructions, training or qualified supervision. Follow your employer's safety program and all applicable laws.

FAHMYUnderstand. Build. Deliver.

FAHMY is a reference, not a substitute for owner specifications, the authority having jurisdiction, manufacturer instructions, training or qualified supervision. Follow your employer's safety program and all applicable laws.

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