As a General Contractor what should I Expect?
Henniker Directional Drilling has an Extensive Fleet of 5 Drill Rigs, Vacuum Systems, Mud Recycler, State of
the art Tracking Systems and Support Vehicles to meet the needs of you small and large drilling Projects. At
HDD we have the ability to complete bores 1" to 30" pipe in lengths of 10 to over 1,500 feet.
Obtaining a quote:
At Henniker Directional drilling we work hard to make this process simple and quick for you while providing
an accurate proposal based on your information. Often a site visit is not needed, however we would be happy
to come to your site and discuss your project anytime! We may ask you for the following information to assist in providing an accurate quote.
- Location of bore
- Type of Utility to be installed
- Pipe size and type
- What type of ground conditions do you anticipate?
- Are there any test bores being done? Results?
- Are there utilities in the bore path that need to be addressed?
- Do you have any plans or drawings?
- Are there written specifications for this project?
- Is a site visit needed?
- Is this a Davis Bacon project? Is it tax exempt?
What the General Contractor may be responsible for:
You may be asked in our HDD contract to provide the following depending on the type and size of your project.
- Traffic Detail
- Having the area cleared thru Dig Safe
- Trenching the entry and exit pits
- Supplying the pipe (if not provided by the HDD Contractor)
- Handling of the pipe
- Final site restoration
- Utility layout
- Connections to the newly installed pipe
- Excavation Permits, Fees and Bonds, Encumbrance Permits and Fees
- Pressure testing
- Supplying water to the site
- Disposal Area for drilling slurry (mud)
Day of Drilling:
What you can expect from us.
- HDD will mobilize to your job site on time and as early as possible.
- HDD can assist you in planning the entry and exit pits if this has not been discussed prior to our arrival.
- The Foreman will walk the job site and assess the best set up for the drill and support equipment. Keeping safety and success in mind.
- The drill operator will calculate the bore path. This may be done with the contractor on a day prior to the scheduled start.
- The driller will have already received the copies of the permits required and have them on site, verify the dig safe status and locate all utilities. HDD along with the contractor assistance may decide to use "potholing methods" to determine the exact location of an existing utility.
- The driller will begin the bore threw the entry pit. Pilot bore with be drilled with standard dirt tooling, spade or Railhead type housing.
- A bentonite polymer mix (drilling fluid) is injected into the hole to stabilize the hole, remove cuttings, reduce torque, lubricate the pipe and cool the bit.
- Monitoring of the bore shall be accomplished thru the use of a tracking system and a tracking equipment operator. The tracker gathers data from the sonde placed in the drill head. The sonde gathers data such as location, depth, roll angle, pitch, and temperature to guide the direction of the bit and control the bore path. Readings shall be taken on every drill rod.
- Monitoring of the drilling fluids will be on a continuous basis during the drilling process Adjustments shall be made according to drilling conditions.
- Excess fluids will be contained and removed by a Vac-truck as needed and disposed of at a site to be determined.
- If loss of circulation occurs, either lost to the formation or surface returns outside of entry-exit pits, drilling will stop until fluid circulation returns or can be contained without impact. Attempts to seal off inadvertent returns will be determined on site and material will be available for this purpose.
- When the pilot hole has been bored a reamer will then be placed. Size and type of reamer will be determined after a review of the ground material encountered during the pilot bore.
- A swivel will be placed between the reamer and the pipe to prevent the product from rotating during the installation.
- Pipe is pulled back to complete the bore.
- The job site will be secured at the end of the day if drilling is not competed.