Percussion drilling definition

Percussion drilling means a drilling method whereby a hammer unit is driven by compressed air giving a series of short, rapid blows to the drill rods or bit, and at the same time applying a rotating motion, with the objective of increasing penetration in hard-rock formations, creating better and larger cuttings of the rock for analysis, and lowering drilling costs;
Percussion drilling means a drilling method using a cable tool drilling machine or a drilling method whereby the permanent or temporary well casing is driven, or is set into a borehole and then driven.
Percussion drilling means the operation of drilling a hole in rock using bits which are hammered against the rock surface with rotating movement.

Examples of Percussion drilling in a sentence

  • GEJ plans to conduct prospecting activities: Percussion drilling and bulk sampling.

  • Percussion drilling involves, first, breaking up the rock or hard soil with an impact tool, and then removing the broken material with a clamshell bucket or some other form of vertical lift.

  • Percussion drilling (4117 metres in 99 holes) and limited diamond drilling (411 me- tres in 3 holes) outlined approximately one million tonnes with an average grade of 0.65 g/t Au and 0.43% Cu. Mineralization occurs within a structur- ally controlled block of brecciated and intensely sili- cified monzonite.

  • Percussion drilling of what was to be known as the 'discovery hole' (PH2) began about midday: 140 feet were drilled between 12.10 p.m. and 6.00 p.mo This hole was about 20 feet away from where hole PH1A had been drilled.

  • The guidance was issued in draft form in November 2004 and had earlier been proposed by OSTP in 2002.

  • Standard Penetration Tests (SPT) were performed in accordance with BS 1377: 90: Part 9, Clause 3.3. Percussion drilling techniques (using tricone rock bit) were used at intervals where neither SPTs nor undisturbed sampling were carried out.

  • Percussion drilling is a cost effective method to obtain structural data from coal deposits.

  • See page 418 of the record.3. Percussion drilling products 4These products are used by mining houses and drilling contractors to drill holes into which explosives are inserted to blast rock so that it can be extracted.

  • An RC Percussion drilling programme, comprising 25 holes for 3,194m, tested 8 targets on EL 2781 (Mt Woods) and EL 2760 (Kangaroo Dam).

  • Hydro – drilling (Air/mud drilling) Includes but not limited to: Rotary drilling up to 450m depth, Percussion drilling, pump test, casing works (PVC, and steel), filter pipes, gravelling, disinfection of boreholes, installation of solar water pumping systems, installation of submersible pump, hand pump, water quality analysis and construction of apron.

Related to Percussion drilling

  • drilling means the act of boring a hole to reach a proposed bottom hole location through which oil or gas may be produced if encountered in paying quantities, and includes redrilling, sidetracking, deepening, or other means necessary to reach the proposed bottom hole location, testing, logging, plugging, and other operations necessary and incidental to the actual boring of the hole;

  • Horizontal well means a well bore drilled laterally at an angle of at least eighty (80) degrees to the vertical or with a horizontal projection exceeding one hundred (100) feet measured from the initial point of penetration into the productive formation through the terminus of the lateral in the same common source of supply.

  • SOFR means a rate equal to the secured overnight financing rate as administered by the SOFR Administrator.

  • Deep well means a well located and constructed in such a manner that there is a continuous layer of low permeability soil or rock at least 5 feet thick located at least 25 feet below the normal ground surface and above the aquifer from which water is to be drawn.

  • Commissioning means the process for determining the need for and for obtaining the supply of healthcare and related services by the Trust within available resources.

  • borehole means a hole sunk into the earth for the purpose of locating, abstracting or using subterranean water and includes a spring;

  • Testson Completion means the tests which are specified in the Contractor agreed by both Parties or instructed as a Variation, and which are carried out under Clause 9 [Tests on Completion] before the Works or a Section (as the case may be) are taken over by the Procuring Entity.

  • Construction Completion means physical construction of a cleanup action component is complete.

  • Commissioning test means tests applied to the Generating Facility, after completion of the construction of the Generating Facility, in order to verify that the Generating Facility may be released for Operation.

  • Turnkey means a procurement process where one service provider assumes total responsibility for all aspects of the project and delivers the full end product / service required by the contract.

  • Drilling operations means the drilling of an oil and gas well and the production and completion operations ensuing from the drilling which require entry upon the surface estate and which were commenced after June 30, 1979, and oil and gas geophysical and seismograph exploration activities commenced after June 30, 1983.

  • Phase 2 means the second implementation phase of this section, beginning June 1, 2022 and continuing thereafter.

  • CBM means Capacity Benefit Margin.

  • Summer Session means the time including all academic offerings during the pre-session, the regular four- week and eight-week sessions, and the post-session.

  • Exploration Well means a well that is not a development well, a service well or a stratigraphic test well.

  • Opium poppy means the plant of the species Papaver somniferum L., except its seeds.

  • Pilot or "Payment in Lieu of Tax" shall mean any payment made to the Agency or an affected tax jurisdiction equal to all or a portion of the real property taxes or other taxes which would have been levied by or on behalf of an affected tax jurisdiction with respect to a project but for tax exemption obtained by reason of the involvement of the Agency in such project, but such term shall not include Agency fees.

  • Drilling unit means the area fixed for the drilling of one well by order or rule of any state or federal body having authority. If a Drilling Unit is not fixed by any such rule or order, a Drilling Unit shall be the drilling unit as established by the pattern of drilling in the Contract Area unless fixed by express agreement of the Drilling Parties.

  • Drywell means an unlined or partially lined underground pit (regardless of geometry) into which drainage from roofs, basement floors, water softeners or other non-wastewater sources is discharged and from which the liquid seeps into the surrounding soil.

  • Single Phase Aerosol Air Freshener means an aerosol air freshener with the liquid contents in a single homogeneous phase and which does not require that the product container be shaken before use.

  • Sailboat means the same as that term is defined in Section 73-18-2.

  • Oil well means any well capable of producing oil or oil and casinghead gas from a common source of supply as determined by the commission.

  • Commissioning Date means that date when construction of the contemplated Project is complete, and the Maintenance Term commences;

  • Water Surface Elevation (WSE means the height, in relation to mean sea level, of floods of various magnitudes and frequencies in the floodplains of coastal or riverine areas.

  • Commencement of Operations means, with respect to any Facility, the completion and the performance of all of the following activities:

  • SMME means small, medium and micro enterprises namely Exempted Micro Enterprises and Qualifying Small Enterprises