Patent · US Active

Method and system for measuring formation resistivity

US10890687B2 · kind B2 · utility

0Cited by

2References

3Claims

0Family size

Assignee

CHINA PETROLEUM & CHEMICAL CORPORATION · CN

Inventors

Sheng Zhan · Houston, US
Jinzhou Yang · Dongying, CN
Jinhai Zhao · Houston, US
Laiju Han · Shandong, CN
Weiping Xu · San Diego, US
Hongbing Xiao · Dongying, CN
Herong Zheng · Houston, US
Zhen Yang · Shandong, CN

Key dates

Filing date	Jun 27, 2019
Grant date	Jan 12, 2021
Priority date	—
Expiry date	Jun 27, 2039

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/026
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.