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Salvageable wireless while-drilling electromagnetic wave resistivity measuring nipple

A technology for measuring pup joints and wireless while drilling, which is applied in the directions of surveying, earthwork drilling, wellbore/well components, etc., to achieve the effect of improving operation efficiency and reducing operation risk

Inactive Publication Date: 2013-02-27
SCHLUMBERGER JHP OILFIELD TECH SHANDONGCO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiency of the existing MWD resistivity measuring instrument, and provide a salvageable wireless MWD electromagnetic wave resistivity measuring sub

Method used

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  • Salvageable wireless while-drilling electromagnetic wave resistivity measuring nipple
  • Salvageable wireless while-drilling electromagnetic wave resistivity measuring nipple
  • Salvageable wireless while-drilling electromagnetic wave resistivity measuring nipple

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Embodiment Construction

[0012] Describe the embodiment of the patent of the present invention in detail below in conjunction with accompanying drawing.

[0013] A salvageable wireless while-drilling electromagnetic wave resistivity measurement sub, including the ground information processing system 1 and the downhole resistivity measurement sub 4, and other supporting equipment are connected by the MWD instrument 3 attached; the ground information processing system 1 Including signal demodulation surface processing box, well depth tracking measuring instrument, surface information processing software, special graphics drawing software, resistivity measurement nipple 4 includes resistivity probe tube 8, resistivity battery cylinder, special coupling, resistivity non-magnetic drill collar 5. The resistivity measurement nipple 4 is attached to the lower end of the downhole device of the MWD instrument 3, and data transmission is performed through the mud signal or electromagnetic wave signal of the MWD i...

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Abstract

The invention provides a salvageable wireless while-drilling electromagnetic wave resistivity measuring nipple, and the resistivity measuring nipple is hung on the lower end of an underground device of a measurement while drilling (MWD) instrument, data transmission is carried out through a mud signal or an electromagnetic wave signal of the MWD, a wellhead is provided with a signal receiver and connected with a ground signal processing system through a data cable; and a circuit and an antenna of the resistivity nipple are integrated inside a resistivity exploring tube, the resistivity exploring tube is provided with a special module circuit for controlling the signal transmission and communication, and the resistivity exploring tube is arranged on the middle side surface part of a resistivity non-magnetic drill collar. The salvageable wireless while-drilling electromagnetic wave resistivity measuring nipple has the advantages that resistivity is measured through an electromagnetic wave way; different depth-sounding resistivity curves can be realized; through the unique design of the measuring nipple, a salvageable function is realized, and the dropping risk of the instrument is minimized; and through the design of a unique resistivity antenna and the design of the resistivity non-magnetic drill collar, tools can be loaded through the cable before the drilling, and well logging can be carried out in the drilling process, so that the operation risk can be reduced, and the operation efficiency can be improved.

Description

technical field [0001] The invention relates to a geological measurement sub-joint in the petroleum drilling industry, in particular to a measurement sub-joint for measuring downhole resistivity while drilling. Background technique [0002] At present, formation resistivity is an important geological parameter necessary for geosteering drilling and oilfield formation evaluation. There are three kinds of resistivity measurement methods that are widely used in China: current measurement method, induction measurement method and electromagnetic wave measurement method. In the field of logging while drilling, the disadvantage of current resistivity measurement is that it is difficult to apply in drilling fluids with poor or non-conductive conductivity, and induction resistivity measurement is also being eliminated. The electromagnetic wave resistivity measurement while drilling adopts the electromagnetic wave working mode, and its outstanding advantage is that it is suitable for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B49/00
Inventor 顾鹏柏险峰付翠玲吴俊杰陈长羽
Owner SCHLUMBERGER JHP OILFIELD TECH SHANDONGCO
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