HDD Assist Methods

HDD ASSIST METHODS

PIPE RAMMING

HDD RAM ASSIST

• When problems arise while horizontal directional drilling (HDD) costs begin to add up with each tick of the clock.

• Quick reaction time and expert technical support are critical to salvaging a bore gone bad.

• The percussive power of pipe rammers can help free stuck product pipes, drill stems, and help remove product pipes on failed bores.

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FOUR METHODS

•Washover casings•Pull back assist•Pipe extraction•Drill stem recovery

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WASHOVER CASING METHODP

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• Used as a pilot for large HDD projects• Casings are rammed through difficult soil

conditions to rock or solid soil

• Makes a guide down hole for mud motors• Casing provides a path for drill fluid

recycling and reduces the loss of fluids in surface soils

ON THE JOB: WASHOVER CASINGS

• Hong Kong, China–Wash over casing

• Pipe sizes–2 – 54” casings

• Equipment–24” Rammer

• Ram distance–2 @ 66’

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PULL BACK ASSIST METHODP

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• Assist HDD when pullback is not possible and machine still has rotation capabilities

• Rammer attached to product pipe

• Percussive power frees immobilized product pipes.

PULLBACK ASSIST

Rammer is locked into steel casing via collets. Steel casing is installed using pullback force of HDD and percussive force of the rammer.

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TCONNECTION METHOD STEEL

PULLBACK ASSSIST

Rammer is locked into steel casing via collets. The steel casing is connected to the HDPE product pipe via steel to HDPE flange compression kit. HDD pull force is used in conjunction with the rammer to install the pipe.

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TCONNECTION METHOD HDPE(OPTION 1)

PULLBACK ASSIST

Rammer is locked into steel casing via collets. Steel casing is welded to steel ring that is flush with HDPE face, and welded to steel sleeve. Steel sleeve is bolted to HDPE product pipe. HDD pull force is used in conjunction with the rammer to install the pipe.

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TCONNECTION METHOD HDPE(OPTION 2)

ON THE JOB: PULLBACK ASSIST

• Normangee, TX–Pullback Assist (pipe stuck for 4

days before start of assist)

• Reason for pullback failure – excessive flooding in area caused collapsed entry pit and hole.

• HDD Rig–500,000 lb pullback

• Pipe–2,800’ of 36” casing


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ON THE JOB: PULLBACK ASSIST

• Stewart, FL–HDPE Pullback Assist, pipe sat

for more than two weeks before assist could be started due to excessive hurricane season.

• HDD Rig–1.2 M lb custom drill rig

• Pipe size–4,500’ of 24” HDPE pipe 80’ deep


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PIPE EXTRACTION METHODP

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• Remove stuck product pipe and bore again

• Rammer is attached to product pipe by fabricating an adaptor

• Percussive action along with static tension pulls product pipe, removing it from the bore

PIPE EXTRACTION

Rammer is locked into steel casing that is welded onto the product casing. Static pull force is used in conjunction with the rammer to extract the product casing.

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TCONNECTION METHOD FOR STEEL CASING

PIPE EXTRACTION

Rammer is locked into steel casing that is welded onto the steel sleeve. Steel sleeve is bolted to HDPE product pipe. Static pull force is used in conjunction with the rammer to extract the product casing.

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TCONNECTION METHOD FOR HDPE

ON THE JOB: PIPE EXTRACTION

• Orlando, FL–HDPE Pipe Extraction

• Pipe size–850’ extraction of 30” HDPE pipe


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DRILL STEM RECOVERY METHODP

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• Recover expensive stuck drill rod• Rammer is attached the to drill rod by

fabricating an adaptor

• Kinetic energy is used to assist in pulling or pushing rod out of the ground with the assist of static tension

ON THE JOB: DRILL STEM RECOVERYP

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RECOMMENDED HAMMERSP

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TRammer

SizeHDD Class

Impact Rate BPM

Calculated Impact Force

at 1 ft/min*

Pipe Diameter Range

7” 24,000 lbs 295 184,000 lbs 8” – 16”

8”24,000; 33,000;

50,000 lbs223 252,000 lbs 8” – 24”

12”33,000; 50,000;

80,000 lbs271 744,000 lbs 12” – 36”

16” 80,000 lbs 231 1,094,000 lbs 12” – 48”

20”80,000;

150,000 lbs190 1,740,000 lbs 20” – 54”

24”150,000 lbs and larger

177 2,020,000 lbs 24” – 72”

*The numbers shown here are based on calculation and are for comparative purposes only between various models of HammerHead Rammers. The numbers are not intended for engineering applications.

THANK YOU

E: [email protected]: 800.331.6653 | INT: +1.262.567.8833 | F: 262.567.5068W: www.hammerheadtrenchless.com

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HDD Assist Methods

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