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Gate valve bonnet failures from thermal expansion of fluids at high temperature - In a steam-assisted gravity drainage application, immediately after start-up, a gate valve bonnet failure caused a release of pressure to atmosphere. In thermal applications throughout the oil and gas industry, there have been incidents of valve failures during start-up. Resulting damage can include stretching studs and loss of pressure integrity between the body and bonnet. The main cause is pressure build-up in the gate valve cavity from thermal expansion of fluids, which was completely full and isolated. Such pressure exceeded the rated working pressure of the valve.

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Job openings


Research Engineers

ExxonMobil Upstream Research Company in Spring, Texas is seeking Research Engineers in the field of oil sands mining and processing to evaluate and develop technologies in the field of heavy oil/bitumen extraction and processing. The position requires a Ph.D. degree in Materials Science and Engineering or related, or completion of all degree requirements towards a Ph.D., and one year of research experience in a chemical or an oil and gas environment/field. Must possess laboratory and experimental experience with designing, developing, calibrating and evaluating systems dealing with flammable materials. Must possess experience in the setup of remote control systems, using LabView, for data acquisition, instrument control, and automation. Research experience must include scaling up of processes from laboratory scale to pilot or commercial scale using computational fluid dynamics simulations (CFD) and experience in advanced materials science engineering, especially in solids size characterization and interpretation of different measurement techniques including laser diffraction analyzers (i.e., Mastersizer analyzer or Coulter multi-wavelength laser diffraction particle size analyzer). Must possess experience with risk assessment evaluations, process safety engineering, hazard analysis, mass transfer and thermodynamics. Experience may be gained prior to Ph.D. degree conferral. Please submit your cover letter and resume to our website www.exxonmobil.com/ex . Please apply to the Research Engineers requisition and reference 25494BR in both your letter and resume.

ExxonMobil is an Equal Opportunity Employer

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, protected veteran status, or disability status.

Geoscience Manager

Supervise geoscience contribution to well design including location and target zones, well path and geo-steering requirements

Identify and progress material unconventional well programs that test new reservoirs/field extensions/play extensions so that the identified programs reach Execution Readiness Identify, mature, and develop new plays, concepts, leads on and around existing acreage Lead team in populating, prioritizing and high grading the portfolio of new opportunities for the Business Unit, ensuring that prioritization is done with consideration of value and risk Use geospatial and other competitor and partner data to identify potential new areas of interest on and around BP’s existing acreage

Utilize existing development frameworks to support geologist and geophysicist staff development.

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