Horizontal Radial Drilling System

Dickinson, W.; Dickinson, R.W.

doi:10.2118/13949-ms

Cited by 66 publications

(26 citation statements)

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“…The agreement is reasonable, taking into account the uncertainties associated to the data and modelization. Interestingly, this example suggests that the early, dusty phase of QSOs at very high redshift can be easily probed by the James Webb Space Telescope with the NIRCam and MIRI instruments (Dickinson 2013), as it can be explored at lower redshift with the WISE All Sky Survey (Wright et al 2010;Banerji et al 2013). …”

Section: Fraction Of Obscured To Unobscured Agns/qsosmentioning

confidence: 99%

The Coevolution of Supermassive Black Holes and Massive Galaxies at High Redshift

Lapi

Raimundo

Aversa

et al. 2014

ApJ

117

114

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We exploit the recent, wide samples of far-infrared (FIR) selected galaxies followed-up in X rays and of X-ray/optically selected active galactic nuclei (AGNs) followed-up in the FIR band, along with the classic data on AGN and stellar luminosity functions at high redshift z 1.5, to probe different stages in the coevolution of supermassive black holes (BHs) and host galaxies. The results of our analysis indicate the following scenario: (i) the star formation in the host galaxy proceeds within a heavily dust-enshrouded medium at an almost constant rate over a timescale 0.5 − 1 Gyr, and then abruptly declines due to quasar feedback; over the same timescale, (ii) part of the interstellar medium loses angular momentum, reaches the circum-nuclear regions at a rate proportional to the star formation and is temporarily stored into a massive reservoir/proto-torus wherefrom it can be promptly accreted; (iii) the BH grows by accretion in a self-regulated regime with radiative power that can slightly exceed the Eddington limit L/L Edd 4, particularly at the highest redshifts; (iv) for massive BHs the ensuing energy feedback at its maximum exceeds the stellar one and removes the interstellar gas, thus stopping the star formation and the fueling of the reservoir; (v) afterwards, if the latter has retained enough gas, a phase of supply-limited accretion follows exponentially declining with a timescale of about 2 e-folding times. We also discuss how the detailed properties and the specific evolution of the reservoir can be investigated via coordinated, high-resolution observations of starforming, strongly-lensed galaxies in the (sub-)mm band with ALMA and in the X-ray band with Chandra and the next generation X-ray instruments.

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Section: Fraction Of Obscured To Unobscured Agns/qsosmentioning

confidence: 99%

The Coevolution of Supermassive Black Holes and Massive Galaxies at High Redshift

Lapi

Raimundo

Aversa

et al. 2014

ApJ

117

114

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“…As more research was conducted, the early potential for abrasive jet cutting to be used in cutting rocks was realized in the late 1960s. Many efforts were made in late 1960s to use water jetting in petroleum industry to drill subsurface reservoir rocks, but favorable results could not be achieved because of deficient abrasive injection techniques [7][8][9][10]. When abrasives were pumped along with water using a positive displacement pump, the process became uneconomical because of prompt wear of pump liners and valves due to abrasives.…”

Section: Principles and Methodologymentioning

confidence: 99%

“…Bulkier cutting head and large pressure drop requirement upstream of the cutting nozzle make currently available units ineffective for down-hole operations. Problems still exist with the abrasive injection systems wearing out the pumps and nozzles [8]. Even though application of abrasive-slurry jetting for full-scale drilling may not be commercially competitive with conventional drilling, its application may be suitable for stimulation applications.…”

Section: Principles and Methodologymentioning

confidence: 99%

Performance Optimization of Abrasive Fluid Jet for Completion and Stimulation of Oil and Gas Wells

Gupta

2012

Journal of Energy Resources Technology

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This paper provides an ovei-view ofthe development and optimization of abrasive-slurryjet methods for completion and stimulation applications. Abrasive particles added to the fluid dramatically reduced the system pressure requirements. The paper discusses the technical capabilities of cutting through various materials and formations and also discusses improvements and proven applications. Abrasive fluid-jet systems are capable of cutting through rocks of all types, and with greater location control that is not susceptible to the geologically induced deviations encountered with mechanical methods. Abrasive fluid-jets drill rock through the erosion induced by very small particles which individually remove only small fragments but are in such numbers that the drilling rate is at or above that of conventional tools. The particles are powered by the velocity of the supporting fluid, generated in turn by pttmps on the surface. The cutting occurs ahead of the nozzle body allowing the nozzle assembly to be fed in the tunnel to create drain-holes. Fluid-jet methods have the potential of improving completion and stimulation efficiency In heterogeneous formations such as fractured and/or vuggy carbonate reservoirs. Application for completion, stimulation and, even, welllplatform abandonment has been successful.

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“…Radial horizontal well technology began in the 1980s. In the past 20 years, radial horizontal well technology has developed rapidly and has the potential to develop unconventional oil and gas [20][21][22][23][24]. is technology requires the use of the high-efficiency rock-breaking water jet bit, high-pressure fluid through small diameter coiled tubing, and high-pressure hose into the jet bit in order to achieve rock-breaking drilling effect.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Study on Flow of Polymer Aqueous Solution in Porous Jet Nozzle

Wei

Zhou

2020

Advances in Polymer Technology

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The addition of a polymer to the jet medium enhances its ability to break rock, and the structure of the nozzle plays a vital role in the full utilization of energy. In this paper, a self-propelled porous jet bit with a support plate is designed, which can prevent the drill bit from jamming due to the jet nozzle against the bottom of the well during the drilling process. And the structural design of the cone-converging nozzle is applied to the forward center nozzle. The polymer additive jet flow field and the pure water jet flow field were compared by numerical simulation and experimental investigation. The results show that the polymer additive jet has a longer isokinetic core, and the rock-breaking volume of the polymer additive jet is much larger than that of the pure water jet, and the optimal spray distance is increased. The forward central jet with the conical convergent nozzle structure has more efficient rock-breaking ability.

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Horizontal Radial Drilling System

Cited by 66 publications

References 0 publications

The Coevolution of Supermassive Black Holes and Massive Galaxies at High Redshift

The Coevolution of Supermassive Black Holes and Massive Galaxies at High Redshift

Performance Optimization of Abrasive Fluid Jet for Completion and Stimulation of Oil and Gas Wells

Numerical Simulation and Experimental Study on Flow of Polymer Aqueous Solution in Porous Jet Nozzle

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