A5012676721- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Drilling and Well Engineering
- Radiation Detection and Scintillator Technologies
- Hydrogen embrittlement and corrosion behaviors in metals
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Non-Destructive Testing Techniques
- Plasma Diagnostics and Applications
- Atomic and Subatomic Physics Research
- Magnetic confinement fusion research
- Offshore Engineering and Technologies
- Material Properties and Failure Mechanisms
- Microstructure and Mechanical Properties of Steels
- Oil and Gas Production Techniques
- Muon and positron interactions and applications
- Welding Techniques and Residual Stresses
- Engineering Structural Analysis Methods
- Cold Atom Physics and Bose-Einstein Condensates
- Metallurgy and Material Forming
University of Bristol
2020-2024
University of Edinburgh
2024
Lawrence Berkeley National Laboratory
1975-2014
University of California, Berkeley
1975-2003
ExxonMobil (United States)
1976-1981
This paper summarizes the results of an examination sulfide stress cracking (SSC) susceptibility selected API and non-API grades high-strength steels subjected to extensive laboratory field tests. Introduction High-strength commonly used in drilling, completing, producing' gas oil wells exhibit catastrophic, brittle failures when exposed environments containing hydrogen sulfide. phenomenon is known as (SSC). SSC has long troubled petroleum industry by placing restrictions on use handling...
Abstract The effect of heat treatment on the sulfide stress cracking (SSC) resistance CA-6NM, CA-15, and AISI 410 stainless steels were evaluated using uniaxially stressed tensile specimens notched C-ring specimens. embrittling environment was an aqueous solution containing 5% NaCl, 0.5% acetic acid saturated with H2S at room temperature. It observed that susceptibility these alloys to SSC dependent yield strength microstructure, which could be controlled by treatment. Specifically, CA-6NM...
Completing sour gas wells with materials that possess innate corrosion resistance may be more practical than to attempt chemical inhibition of steel alloys. A program screening tests determined alloy systems containing large amounts nickel, cobalt, chromium, and molybdenum have exceptional for this environment. Introduction family highly alloyed, super austenitic stainless tubular goods, virtually inert having yield strengths in the range 150,000 250,000 psi, soon appear oil patch. This new...
Experiments on reduced-scale compartments with timber ceilings and floors were conducted to investigate the ignition of ceiling growth flashover. Pool fires various sizes ignited measurements made temperature in plume jet, mass floor. The compartment geometry was also systematically varied. results showed that occurred when measured at level between 328°C 347°C. This aligned intermittent flame impingement from initiating fire. Following ceiling, most cases fire subsequently spread across...
This investigation was initiated to characterize the fractography of sulfide stress cracking (SSC). Fractography, defined as descriptive treatment fracture with specific reference photography surface, is used by metallurgists service failures high strength steel. Fractography has shown that environmentally sensitive embrittlement mechanisms (such hydrogen embrittlement, corrosion (SCC), liquid metal and fatigue) are characterized nucleation propagation brittle cracks.
The front-end systems (FES) of the spallation neutron source project are being built by Berkeley Lab and will deliver a pulsed 40 mA H− ion beam at 2.5 MeV energy to subsequent drift-tube linac. FES accelerator components comprise rf driven, volume-production, cesium-enhanced, multicusp source; an electrostatic low-energy transport (LEBT) that includes provisions for transverse focusing, steering, chopping; radio-frequency quadrupole accelerator; medium-energy line. challenges LEBT design...
Abstract Acidizing is a primary method of oil and gas well completion in carbonate formations frequently used as stimulation technique the shaley Gulf Coast sands. The question effect acidizing on tubular goods has been greater interest since use high strength materials deep wells (acidizing depths have ranged to 22,000 feet). two effects acid steel are: (1) corrosion simple metal loss, (2) embrittlement catastrophic cracking material. Only second these considered here.
The Spallation Neutron Source front end incorporates a beam chopper in the LEBT that will remove 295 ns section of at 1.118 MHz rate (65% transmission) with less than 50 rise/falltime. H/sup -/ pulse length is one ms 60-Hz (6% duty factor). all-electrostatic, and four 3-kV solid-state switches driving an einzel lens, split into quadrants, 4-phase chopping waveform. suppressed targeted on four-segment Faraday cup which provides on-line intensity steering diagnostics. Results proton tests be reported.
The Front-End Systems (FES) of the Spallation Neutron Source (SNS) project have been described in detail elsewhere. They comprise an rf-driven H/sup -/ ion source, electrostatic LEBT, four-vane RFQ, and elaborate MEBT. These systems are planned to be delivered SNS facility Oak Ridge June 2002. This paper discusses latest design features, status development work, component fabrication procurements, experimental results with first commissioned beamline elements.
Summary A completion program for a high-pressure deep, sour gas well (DSGW) requires exceptionally heavy-wall large-diameter casing, particularly where an additional tubing string is required to provide continuous chemical injection and set on packer. Production protection casings of unprecedented weight thickness were obtained recently such well. This paper describes the qualification these specifications controls used ensure acceptable sulfide stress cracking performance. The are result...
Studies show that increasing temperature alleviates the effects of sulfide stress cracking in high-strength steel. This means higher strength steels can be used hotter portion hole as a lowering stresses more critical, cooler portion. Introduction The production deep, sour wells places severe demands on tubular goods. Below about 15,000 ft it becomes necessary either to use grades than C-75 or employ special equipment such tapered strings down-hole hangers because generated by hanging weight...
The ability of synchrotrons to accelerate particles with different e/m0 values is dependent upon being able control its accelerating-voltage frequency as a function the actual guide field value. Interpolation between modification can be performed reduce possibility exciting phase oscillation. Differences desired and produced (due non-linearities in system) are also removed digital processor increasing precision system up two orders magnitude. Successful operation six has been demonstrated.
ABSTRACT There is considerable interest in producing deep, high-pressure reservoirs that contain substantial amounts of sour gas. Because the great depths and pressures involved, it necessary to use high-strength tubular materials if safety features such as a downhole packer are be incorporated into completion design. It known production from these wells severe standpoint corrosion sulfide-stress cracking steels. Recent work has also identified two potential problems with high-strength,...
ABSTRACT Deep, abnormal-pressure, sour gas well development has resulted in the investigation of alternate alloys for use high-pressure wellhead equipment. Evaluation more traditional produced results that were considered to be deficient thick-wall, This paper describes laboratory evaluations a chromium-one percent molybdenum low alloy steel family provides uniform throughwall physical properties and manufacturing experience with this application. Also described is certification procedure...