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Topic: Directional drilling

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	Bay State Piping Company, Inc. - Directional Drilling
		Directional drilling and Horizontal Auger Boring are usually the most practical depending on size and soil conditions.
		Directional drilling can all but eliminate restoration, percussion moling can make driveway, road, and garden crossings without disrupting the surface, and horizontal auger boring or steerable rod pushing can cross roads with larger diameter pipe.
		A specialized drilling head with a sampling container is used to steer the drill rods to the specific location.
	www.baystatepiping.com /directional_drilling.htm (867 words)

	Directional Drilling Promises Benefits for Industry - Mining Technology
		Directional drilling is a relatively new aspect of exploration technology in the mineral resources industry.
		Once the deflection is completed, the directional drilling equipment is removed from the hole and classical core cutting technology is used to traverse the lithology," he says.
		Directional drilling technology is still in its early stages of development as far as hard rock and deep exploration environments are concerned.
	www.mining-technology.com /contractors/project/murray_roberts/press12.html (1041 words)

	EARTHWORKS - Directional Drilling
		Directional drilling techniques exist that allow wells to be drilled at angles (slant hole wells); allow wellbores to curve sideways (horizontal wells); or to have more than one curve (S-curve or deviated wells).
		The drilling of a directional well is more costly than drilling a typical vertical well because it requires specialized equipment; constant attention to the placement of the drill bit; it takes several days longer to drill the wells; and pumping costs may increase because parts may wear out faster.
		It is estimated that the application of horizontal drilling to this formation may yield an additional 80 to 100 million barrels of oil.
	www.earthworksaction.org /bpDirectionalDrilling2.cfm (759 words)

	Hdpe Pipe for Horizontal Directional Drilling - HDD
		Horizontal directional drilling is often used where open cut installations are not feasible such as road and river crossings.
		Drilling mud is used to cool the cutter, to flush excavated soil from the borehole and to lubricate the borehole.
		As the drill string is withdrawn to the drilling rig, the backreamer enlarges the borehole and the pipe string is drawn in.
	www.oxfordplasticsinc.com /directionaldrilling.htm (369 words)

	Directional drilling
		Because horizontal and directional drilling methods often utilize existing vertical wellbores, additional wells may be drilled without additional disruption to the environment.
		Horizontal drilling may also provide access to oil and gas in thin, tight reservoirs that may be inaccessible by vertical drilling.
		Directional drilling also greatly enhances offshore drilling efficiency by providing access to multiple targets from a single offshore platform.
	www.oxy.com /OIL_GAS/technology/direct_drill.htm (262 words)

	NaturalGas.org
		Directional drilling is the process of drilling a curved well, in order to reach a target that is not directly beneath the drill site.
		With directional drilling, the offshore rig can gain access to deposits that are not directly beneath the rig, meaning that 20 or more wells can be drilled from a single rig, making it much more cost effective to drill offshore.
		The difference between traditional directional or slant drilling and modern day horizontal drilling, is that with directional drilling it can take up to 2,000 feet for the well to bend from drilling at a vertical to drilling horizontally.
	www.naturalgas.org /naturalgas/extraction_directional.asp (1027 words)

	Horizontal Directional Drilling Company Asia
		The drilling operation begins by drilling a pilot hole using the drill bit, the drill head and the pressure injection of drilling fluid.
		As each drill rod is drilled into the ground the locator operator takes a reading from his equipment and informs the drill operator of the location, pitch and roll of the drill head.
		Once the drill bit exits the other end of the drill hole, the drill head is removed and a reamer is attached to the drill string.
	www.strega.co.th /services_method.asp (1087 words)

	Directional Boring Advantage
		Directional boring, commonly called horizontal directional drilling or HDD, is a method of installing underground pipes and conduits along a prescribed bore path from the surface, with minimal impact to the surrounding area.
		Drilling fluid is generally a mixture of bentonite clay and water, with additives used to improve performance.
		Directional boring has evolved steadily over the last 20 years and is now the preferred method on many installations due to its low cost and low impact on surroundings.
	www.directionalboringcentral.com /library/dba/dbapamphlet.htm (1166 words)

	Directional drilling to targets between oilwells
		Drilling directionally to reservoir targets from exisiting wellbores is one method with good economics even at ultra-low oil prices.
		Drilling directionally is accomplished by using a gyro tool for orientation and cutting a window or milling a section in the casing exposing the formation rock at the kick off point.
		Drilling assemblies are then oriented to drill toward the target area until it is reached, in these cases only about 700' from the existing wellbore.
	www.georgedreher.com /Oil_Drilling.html (2038 words)

	Directional Drilling Terms Defined (makinhole.com)
		automated directional drilling - directional drilling with a system possessing a drilling mode whereby "tool settings" are automatically determined by system software, and frequently and automatically changed/controlled by system hardware, while drilling.
		directional drilling - the field/industry that encompasses the act of drilling a section of well bore that is intentionally oriented non-vertically; horizontal drilling is a subset of directional drilling.
		directional survey station - a reference point that corresponds to a measured depth along the (typically actual) well path where well bore inclination and azimuth are observed/measured and recorded.
	www.makinhole.com /glossary.htm (2650 words)

	Layne Christensen Company - Directional Drilling Services - Applications for Directional Drilling
		Directional Drilling to pinpoint targets or multiple targets at multiple depths or intersecting predetermined zones.
		Inaccessible Surface Areas such as lakes, rivers and building where it is impossible to set a drill to drill down to the zone.
		Pilot Holes for Raise Bore Shafts Drilling and remaining in small cylinder areas to maintain a stress-free hole for the rods to turn the hole openers; drilling with steerable motors to speed up penetretion rates.
	www.accu-dril.com /applications.html (171 words)

	FOCUSED TECHNOLOGY WORKSHOP
		Additionally, because well control problems and drilling rig systems are different than those required for conventional drilling, we included a segment on new surface systems that control fluid pressure, and a review of on-going research and development of downhole systems that will improve the efficiency and speed of directional drilling in the future.
		Their advice to operators drilling in Oriskany: 1) expect a high fluid loss, 2) gauge problems accurately (such as the recognition that the Oriskany is a very abrasive rock, thus a compatible drilling fluid must be selected), and 3) it takes some time to see improvements.
		The drilling plan for this well, in Mahoning County, was to kick off below the Salina salt horizon, attain 70o at the top of the Clinton, and increase to angle to 90o in the red Clinton for a distance of 1900'.
	karl.nrcce.wvu.edu /regional/hdrk.html (2285 words)

	FAQ for Directional Drillers from Directional Drilling Jobs
		Directional Drilling Jobs does not warrant that the Website is free of errors or viruses and is not liable for any damage you may suffer as a result of such destructive features.
		Directional Drilling Jobs is taking reasonable and appropriate measures to ensure that your personal information is not disclosed to unauthorized parties.
		These Terms and the relationship between you and Directional Drilling Jobs shall be governed by the laws of the province of Alberta without regard to its conflicts of law provisions.
	www.directionaldrillingjobs.com /FAQ.html (1440 words)

	RIGZONE - Oil & Gas Directory - Directional Drilling
		An independently owned directional drilling contractor providing leading edge drilling motor, survey technology and personnel to plan and drill directional, horizontal and short radius wellbores for the energy industry.
		Computalog, a subsidiary of Precision Drilling Corp., is a dynamic international oilfield service company specializing in wireline logging and directional and horizontal drilling technologies.
		The company is directed and managed by experienced and professional managers with many years of experience in directional drilling surveying and oil drilling activities.
	www.rigzone.com /search/c/companies/drilling_well_services/directional_drilling (1020 words)

	Associated Directional Drilling--AEI, Corp.
		Associated Directional Drilling, Inc. was formed as a division of Associated Industries, Corp. to provide high quality horizontal and directional drilling services in the environmental drilling market.
		ADD drilled several holes in a grid pattern over the proposed bore path and used a high pressure injection pump to introduce cement into the formation.
		After the cement had cured properly, the zone of interest was solidified and ADD was able to drill through the zone with a mud motor, then back-ream the entire zone with a 12-inch back-reamer thus completing the final installation of 1245 feet of 8-inch SDR9 HDPE.
	www.aei-corp.com /add.html (288 words)

	4-35 Directional Wells
		Drilling techniques are used to position wells horizontally, or at an angle, to reach contaminants not accessible by direct vertical drilling.
		Directional drilling may be used to enhance other in-situ or in-well technologies such as ground water pumping, bioventing, SVE, soil flushing, and in-well air stripping.
		Several directional holes were drilled; a depth of 12 meters (40 feet) was achieved with a maximum horizontal extent of 174 meters (570 feet).
	www.frtr.gov /matrix2/section4/4-36.html (851 words)

	ADB99-04: Directional Drilling...
		Directional drilling and other trenchless technology operations employ a variety of cutting, jetting, boring, reaming, and jacking techniques.
		Additionally, NTSB Safety Recommendation P-99-1 (April 28, 1999) directs that PHMSA [w]hen reviewing pipeline operator safety programs, ensure that the operators' damage prevention programs include actions to protect their facilities when directional drilling operations are conducted in proximity to those facilities.
		NTSB determined that the probable cause was the failure of the pipeline operator to ensure that safe directional drilling operations were conducted in proximity to underground facilities.
	ops.dot.gov /regs/adv/adb9904.htm (978 words)

	Directional Drilling Moves in Next Door
		Directional drilling is moving from urban street and highway right-of-ways and cross-country telecommunications construction projects to individual yards of private residences.
		Compact horizontal directional drilling equipment, designed specifically for installing street-to-house utility lines, allow replacement of old services and installation of new pipe and cable without excavating through carefully-tended lawns or damaging shrubs and trees.
		Dickson believes directional drilling is being used more frequently because all parties involved in utility projects are becoming familiar with what the equipment can do.
	www.ditchwitch.com /dwcom/OnTheJob/JobDetail/9 (798 words)

	E. B. I. DIRECTIONAL DRILLING INC
		EBI was awarded a contract from the City of New London for the installation by directional drilling of a 12-inch HDPE water main as part of the Wolf River and Rasmussen Canal Crossings Project in New London, Wisconsin.
		EBI was awarded a subcontract from A-1 Excavating for the installation by directional drilling of a 4-inch HDPE force main as part of the Pattison Park Sewer Reconstruction Project in Superior, Wisconsin/Douglas County.
		EBI was awarded a subcontract from A-1 Excavating for the installation, by directional drilling, of a 12-inch DIPS HDPE water main for the Water and Wastewater Improvements Project in Antigo, Wisconsin.
	www.cpinternet.com /~earthbrn/wisconsin.html (1032 words)

	Mitchell Directional Drilling
		Mitchell Drilling's revolutionary Dymaxion® surface-to-inseam technique has allowed our company to assist clients to release enormous economic value from what they previously considered marginal or uneconomic gas deposits in their portfolios.
		To date Mitchell Directional Drilling has enjoyed a 100% intersection rate of the surface-to-inseam wells with the main vertical wells by using specially prepared, proprietary software and some of the industry''s most experienced directional drillers.
		Mitchell Directional Drilling brings the surety of a 35 year heritage in the drilling industry and blends it with our client focussed approach – the result, is a professional service that can make a major contribution to adding significant commercial value to our clients CBM projects.
	www.mitchelldrilling.com /directional/index.htm (147 words)

	Directional Drilling
		The longer side must be parallel to the proposed drilling direction with the mid-point of the shorter side facing the drilling direction at the Entrance to the proposed drill hole.
		Before the drilling operation begins, the drill site is surveyed and a drill plan and profile is established.
		from the end farthest from the drill rig, prior to the pullback commencing.
	www.laneydrilling.com /html/directional_drilling.html (1480 words)

	Directional Drilling Jobs for Directional and Horizontal Drillers
		The Directional Drilling Job market requires a dedicated and focused web site that caters to the needs of both companies and consultants.
		Directional Drillers need to register to get access to the job details, and receive email notification of new job postings that meet their criteria.
		Directional Drilling Companies post their current job openings, thus eliminating the waste of traditional advertising mediums.
	www.directionaldrillingjobs.com (169 words)

	Valley Longwall Drilling - Drilling Services
		Directional drilling is a valuable tool in today's coal mining environment - where unexpected geological anomalies or uncontrolled gas and water problems can have a critical effect on the safety, viability and productivity of a mine.
		The down-hole motor has a bent sub that enables the drill string to be steered along a desired path.
		Continuous survey readings from an electronic drill guidance tool enable real time correction to be made to the path of the borehole.
	www.valleylongwall.com.au /directional.htm (446 words)

	Associated Directional Drilling--AEI, Corp.
		Associated Directional Drilling, Inc. was formed as a division of Associated Industries, Corp. to provide high quality horizontal and directional drilling services in the environmental drilling market.
		ADD drillers are required to complete an extensive directional drilling training program which focuses on locating, steering and drilling.
		ADD drilled several holes in a grid pattern over the proposed bore path and used a high pressure injection pump to introduce cement into the formation.
	aei-corp.com /add.html (288 words)

	Offshore - Preparations for offshore casing directional drilling
		The tests were conducted in a wellbore profile similar in complexity to the well to be drilled off of the Eldfisk B platform offshore Norway with 10 3/4-in.
		However, there are no known cases where an offshore directional well has been drilled with the expectation that the directional BHA would be pulled with a wireline and replaced while drilling the section.
		The mature North Sea field application requires a fully retrievable casing drilling system to replace the directional assembly in the event of a component failure, to provide flexibility in BHA selection, and to recover the drilling assembly once the casing point is reached.
	www.offshore-mag.com /display_article/272383/ARTCL/none/Preparations_for_offshore_casing_directional_drilling (504 words)

	AJ Lucas Group - Horizontal directional drilling
		While small-scale drilling is now widely used to install utilities around cities, large-scale ('big rig') work is still very demanding engineering that requires skilled staff, experience and specialised equipment.
		Today, we have rigs from 65 to 300 tonnes working around the region for horizontal directional drilling projects.
		Drilling engineers and directional drilling steerers are nee...
	www.lucas.com.au /index.cfm?section=1&homeContentID=22 (375 words)

	Horizontal Directional Drilling
		While locally produced bentonites might be adequate for drilling simple water wells in sandy soils, they lack the properties that are important for the more sophisticated HDD technology.
		The yield of drilling fluids are typically compared by how many barrels (42 gal/bbl) of drilling fluid at 40-cps that one short ton (2,000 lbs) of bentonite will make.
		Having advanced drilling fluids in China allows the HDD contractor to use the same technology that his counterparts in Europe and the USA have been successfully drilling with for several years.
	www.cetco.com /cn/drilling.htm (1381 words)

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