USED BOREHOLE DRILLING EQUIPMENT : DRILLING EQUIPMENT


USED BOREHOLE DRILLING EQUIPMENT : RAIL CONSTRUCTION EQUIPMENT : HOT LAB EQUIPMENT.



Used Borehole Drilling Equipment





used borehole drilling equipment







    borehole
  • (Boreholes) Long shaft drilled into the earth for the construction of water wells.

  • The hole in the earth made by the drill; the uncased drill hole from the surface to the bottom of the well.

  • A borehole is the generalised term for any narrow shaft drilled in the ground, either vertically or horizontally.

  • A deep, narrow hole made in the ground, esp. to locate water or oil











used borehole drilling equipment - Quantitative Borehole




Quantitative Borehole Acoustic Methods, Volume 24 (Handbook of Geophysical Exploration: Seismic Exploration)


Quantitative Borehole Acoustic Methods, Volume 24 (Handbook of Geophysical Exploration: Seismic Exploration)



Acoustic logging is a multidisciplinary technology involving basic theory, instrumentation, and data processing/interpretation methodologies. The advancement of the technology now allows for a broad range of measurements to obtain formation properties such as elastic wave velocity and attenuation, formation permeability, and seismic anisotropy that are important for petroleum reservoir exploration. With these advances, it is easier to detect and characterize formation fractures, estimate formation stress field, and locate/estimate petroleum reserves. The technology has evolved from the monopole acoustic logging into the multipole, including dipole, cross-dipole, and even quadrupole, acoustic logging measurements. The measurement process has developed from the conventional wireline logging into the logging-while-drilling stage.


For such a fast developing technology with applications that are interesting to readers of different backgrounds, it is necessary to have systematic documentation of the discipline, including the theory, methods, and applications, as well as the technology's past, present, and near future development trends. Quantitative Borehole Acoustic Methods provides such documentation, with emphasis on the development over the past decade. Although considerable effort has been made to provide a thorough basis for the theory and methodology development, emphasis is placed on the applications of the developed methods. The applications are illustrated with field data examples. Many of the acoustic waveform analysis/processing methods described in the book are now widely used in the well logging industry.










86% (10)





marine riser joint on the v-door on a drilling rig




marine riser joint on the v-door on a drilling rig





Drilling boreholes in underground earth formations situated below a body of water may be performed by mounting drilling equipment on a floating vessel, and arranging a marine riser between the vessel and a wellhead situated at a level near the sea bottom (or ocean bottom). Such a marine riser consists of a plurality of sections that are interconnected in end-to-end relationship. The sections consist of tubes having a relatively large diameter so that a string of interconnected sections forms a tubular communication between the wellhead and the floating vessel. Tubular equipment (such as a drill string) may be guided from the vessel into the well through this communication, which further forms a return passage for the drilling fluid that has been used in the well.

The lower end of the marine riser is connected to the wellhead. The upper end of the riser is connected to the floating vessel and loaded with an upwardly-directed force to prevent buckling of the riser. A reduction in the magnitude of the required upward force can be obtained by arranging buoyancy members around the sections.

It will be appreciated that the marine riser should preferably extend almost vertically through the water. To achieve this, the vessel is anchored (either by means of sea-anchors or dynamically by the action of propulsion means) to maintain a position that is (as nearly as possible) straight above the well. However, it will be appreciated that conditions may arise, wherein excessive wave or current action on the vessel displaces the vessel in a horizontal direction to an extent which may cause overloading of the marine riser.

To prevent damage of the marine riser, the drilling operator should be continuously informed on the load condition of the marine riser to enable him to take the required steps for counteracting excessive displacement of the floating vessel, or to take any other measures to obviate excessive loads on the marine riser.

Some indication of the load exerted on a marine riser may be obtained by calculating and/or measuring the curvature thereof. Information on the curvature allows the operator (in combination with additional data, such as the upward forces exerted by the buoyancy means, the weight of the marine riser, the lifting force exerted on the marine riser at the upper end thereof) to calculate the stresses in the marine riser at the location(s) where extreme load conditions exist.












Roped hydraulic elevator motor




Roped hydraulic elevator motor





Roped hydraulic elevators remain uncommon, but have gained favor in recent years because they allow the hydraulic piston to be installed above ground, eliminating the need for costly drilling underground to install a borehole jack. This also makes servicing the piston significantly easier. A warning label instructs anyone maintaining the elevator to take note of this uncommon configuration; it reads:

Warning - Roped Hydraulic - Do not use manual lowering valve if unit is on safeties. Excess slack rope will occur and equipment damage may occur. Do not leave manual lowering valve in open position. Excess oil may flood tank.









used borehole drilling equipment








used borehole drilling equipment




Water Wells and Boreholes






Water Wells and Boreholes provides the necessary scientific background together with practical advice using global case studies, in an accessible easy to use style suitable for both postgraduates/researchers and practitioners.
The book begins with an introduction to the type and uses of water wells from water supply and irrigation through to groundwater remediation. It then covers well siting detailing how to source data from geophysical surveys, remote sensing etc. Well design is then summarised to ensure the well is stable and cost-effective. The book ends with three chapters covering well construction, well testing and well performance, maintenance and rehabilitation.

Water Wells and Boreholes provides the necessary scientific background together with practical advice using global case studies, in an accessible easy to use style suitable for both postgraduates/researchers and practitioners.
The book begins with an introduction to the type and uses of water wells from water supply and irrigation through to groundwater remediation. It then covers well siting detailing how to source data from geophysical surveys, remote sensing etc. Well design is then summarised to ensure the well is stable and cost-effective. The book ends with three chapters covering well construction, well testing and well performance, maintenance and rehabilitation.










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