China Petroleum Chemical Corporation

Sinopec Tech Houston, LLC

Beijing Tienyi Lufu Pharmatech Co. Ltd.

Drilling Technology Research Institute of Shengli Petroleum Engineering Corporation Limited, Sinopec

Exploration & Production Research Insitute, Sinopec

China Petro-chemical Corporation Shengli Petroleum Administrative Bureau

Weiping Xu

Sheng Zhan

Jinhai Zhao

Herong Zheng

Hongbing Xiao

Jinzhou Yang

Zhen Yang

Laiju Han

Haihua Zhang

Jing Li

Jun Han

Changming Su

Caixuan Guo

Peizhi Yu

Jiafen Li

Xiushan Liu

Baoyu Guo

Yingchun Cui

Rushan Liu

Zengchen Guan

The present invention relates to pyran-fused ring compounds, preparation methods thereof and use thereof, especially to pyran-fused ring compounds usable for preparing Halichondrin, Eribulin, or analogues thereof, preparation methods thereof and use thereof. Use of any of the compounds of formula (I) to (XIII) of the present invention in preparation of Halichondrin B, Eribulin, analogues thereof or C1-C13 moieties thereof. Provided in the present invention are intermediates usable for preparing Halichondrin B, Eribulin, or analogues thereof, especially the key product of C1-C13 moieties, preparation methods thereof and use thereof. The starting material for the synthesis pathway of the present invention is inexpensive and readily available with sustainable source and reliable quality. Since the structural characteristics of the reactants of theirself are made full use in choosing the method of constructing the chiral centers, the efficiency in the synthesis is considerably increased, the difficulty in and the risk on quality control of the product are reduced; and using a highly toxic and expensive high-valent osmium catalyst is avoided, which have the cost and environmental friendliness significantly improved.

Pyran fused ring compound, preparation method therefor and use thereof

A downhole drilling system has a downhole motor, a universal-joint assembly having an upper universal joint and a lower universal and a connecting rod connecting the upper universal joint and the lower universal joint, and a measurement sub. The measurement sub is disposed about the connecting rod and the connecting rod extends through the measurement sub in a longitudinal direction thereof.

Method and system for measuring formation resistivity

This disclosure provides a downhole drilling system, which comprises a downhole motor, a universal-joint assembly comprising an upper universal joint and a lower universal and a connecting rod connecting the upper universal joint and the lower universal joint, and a measurement sub. The measurement sub is disposed about the connecting rod and the connecting rod extends through the measurement sub in a longitudinal direction thereof.

System for geosteering and formation evaluation utilizing near-bit sensors

A downhole drilling tool has a deep-reading logging tool, a near-bit resistivity tool, and a gamma ray detector. Formation information logged using the deep-reading logging tool is used to build a preliminary stratigraphic model with a relatively low resolution. The preliminary stratigraphic model is further refined using data logged using the near-bit resistivity tool and/or the gamma ray detector to obtain a refined stratigraphic model with a higher resolution. The model is used to guide geosteering to achieve better well placement and trajectory control.

Near-bit ultradeep measurement system for geosteering and formation evaluation

A downhole drilling tool that has a deep-reading logging tool, a near-bit resistivity tool, and a gamma ray detector. Formation information logged using the deep-reading logging tool is used to build a preliminary stratigraphic model with a relatively low resolution. The preliminary stratigraphic model is further refined using data logged using the near-bit resistivity tool and/or the gamma ray detector to obtain a refined stratigraphic model with a higher resolution. The model is used to guide geosteering to achieve better well placement and trajectory control.

The present disclosure provides the printed circuit board assembly suitable for operating downhole at high temperatures. The printed circuit board assembly has a ceramic circuit board with a plurality of chips installed on it. At least one of the chips has an aluminum nitride or a silicon nitride substrate. In some of the chips, aluminum nitride is used as the oxide layer in a Si-on-Insulator configuration. In other chips, integrated circuits are fabricated on a substrate made from aluminum nitride, silicon nitride, silicon carbide, or sapphire.

Electronic devices for high temperature drilling operations

The present disclosure provides a drilling system that comprises a drilling rig, a device box having a plurality of sensors monitoring operating parameters of the drilling rig, an OPC UA server receiving data from the plurality of the sensors, and an OPC UA client in communication with the OPC UA server. The OPC UA client has a client library between the client application layer and the client SDK layer, which converts a client application to an OPC UA operation.

Systems and methods for drilling automation with OPC UA

A managed pressure drilling (MPD) system employs reliability models such as Failure Modes and Effects Analysis (FMEA), Fault Tree Analysis (FTA), Ishikawa diagram, Pareto chart, Reliability Block Diagram (RBD) in assessing and optimizing the system reliability. The MPD drilling system is suitable for offshore drilling operations.

Reliability assessment and risk management for managed pressure drilling

An electropositive and water-based production well treating fluid system exhibits electropositivity by using a cationic viscosifier meanwhile matched with a cationic fluid loss additive and, optionally, contains a mud-building agent, an electrical stabilizing agent, a colloid-stabilizing agent, lubricant, an oil layer protective agent and/or a weighting agent. The electropositive production well treating fluid can beffer solve the contradiction of technical requirements between 'treating fluid stability' and 'bore hole stability', and features a strong ability to inhibit the dispersion of clay, a good effect of protecting oil-gas reservoirs, fast drilling speeds, regular shape of bore holes and good resistance to salt.

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Houston, TX, United States of America

Weiping Xu