..., and then need to disconnect the LMRP and BOP connection promptly. Abstract Subsea wellhead bearings complex stress because it joint with the marine riser and casing string. According to mechanical analysis of subsea wellhead for deepwater drilling, a comprehensive stability of subsea wellhead analysis...

... and maximizes the magnitude of the revenues to be divided. The tools of contractual arrangements that are used in ensuring a balanced sharing of risk and reward between the investor and the government are the stabilization and fiscal clauses, renegotiation clauses and Bilateral Investment Treatises (BIT...

... formation. However, the borehole stability is a big problem through several pilot gas drillings. In this paper, combined lab investigations with pilot drilling information analysis, it is found that the complex geologic conditions and drilling operations lead to at least four kinds of borehole instability...

...-high temperature completion fluid was used to guarantee the success of logging and casing. It was proved in the field application of Shengke1 that the drilling fluids exhibited a series of advantages, including excellent rheology behavior, good thermal stability and low filtration rate. It was easy...

... damage to string tools or to the bit, and sub-optimal drilling performance. This paper explores the theoretical relationship between bit and reamer and modeling the relative aggressivity and stability of both tools, building on already established indices for predicting and comparing the performance...

... measures are adopted to ensure the success of drilling operations: studying the stability of the borehole, optimizing the hole structure and casing program, establishing the drilling fluid system and its formulation. We get the pore pressure, collapse pressure, and the fracture pressure by studying...

... formation stability coefficients respectively based on Mohr-Coulomb yield criterion and Drucker-Prager yield criterion is presented. Stress around perforations and Drucker-Prager yield criterion are used to establish a sand production prediction model and prediction software was programmed. Finally...

... kind of water-absorbent resin, Double Network Water-absorbent Resin(DNWR), which could be used in deep well or ultra deep well to solve loss problems. The most difference between DNWR and traditional water-absorbent resins is that DNWR has excellent mechenical properties and good thermal stability...

... existing in the foamy oil has an obvious action on the flow improvement of heavy oil. The major purpose of this study is to investigate and analyze the foam properties, and to verify its action on the flow improvement of heavy oil. Based on the evaluation of foamability, stability and comprehensive...

... depth is 6780m) wells. Finally the paper identified some of the drilling fluid challenges that still lie ahead during the ultra-deep drilling process. evaporate bed drilling fluid property saltwater wbm stability barite drilling fluid management & disposal dissolution drilling fluid...

... drilling fluid management & disposal well control annular pressure drilling resistance Drilling Hazard stability reduction permeability strength sandpack characteristic gel preparation Upstream Oil & Gas thermal stability Pore Fluid gel system drilling mud Efficiency control...

... trajectory designs and drilling fluid formulations in order to mitigate wellbore instability related problems. A comprehensive study of wellbore stability in shale formations that takes into account the 3-dimensional earth stresses around the wellbore as well as chemical and thermal effects is presented...

... SAGD emulsification enhanced recovery oilfield stimulation stability flooding reservoir spe 104404 steam injection surfactant SEPA society of petroleum engineers injection viscosity new technology heavy oil primary component reservoir characterization technology injecting steam well...

... Abstract This article presents the stability research of latex tenacity cement slurry, develops the BCT series stabilizer and studies the performance of the slurry and the set cement. Due to the slurry performance study, it is found the latex material can be evenly distributed in the slurry...

... (Chambers 1 , Mackenzie and Hogg 2 ). objective requirement lateral implementation drilling operation brister upstream oil & gas stability multilateral well wellbore multilateral technology reservoir artificial intelligence application multilateral system directional drilling...

... to be compromises, but the most critical elements should take precedence over secondary areas. Geologic Parameters Choosing the location of the junction also depends upon geologic parameters which include lithology, reservoir pressure, drainage area, wellbore stability, crossflow potential, drawdown, coning...

... For perfectly Mohr-Coulomb material, the relationship between S t and S r at the limit of shear stability can be expressed as: (1) S r − S t = − ( 2 sin α 1 − sin α ) [ S r − P + S o cot α ] To maintain mechanical stability...

... analysis, and then introduces the study of thermal-oxidative stability of polymers by adding stabilizers. Finally it summarizes the optimized design and effectiveness of high-temperature (72 C) polymer flooding pilot test in layer II 5, Shuanghe oilfield, where oil recovery is increased by 10.4%. P. 533...

... of design charts, for efficient wellbore stability analysis and wellbore profile design. A comprehensive practical approach of using the design charts for wellbore profile design is subsequently described. The application of the design charts is demonstrated through field case studies for a range of in-situ...

... determined using a range of analytical and laboratory techniques. The laboratory simulation results for various mud types were used in the refinement and verification of the models. The verified models, which have been integrated in a wellbore stability analysis software, were used to conduct analyses...