Deep exploration logging-while-drilling instrument

A logging-while-drilling tool and drill collar technology, used in surveying, earth-moving drilling, flushing wells, etc., can solve problems such as shallow detection depth, and achieve easy maintenance, high modularity, and improved detection depth and detection. The effect of precision

Pending Publication Date: 2020-06-23
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcoming that the detection depth of the existing LWD tool is too shallow, and provide a deep detection LWD tool

Method used

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  • Deep exploration logging-while-drilling instrument

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Embodiment Construction

[0039] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0040] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a deep exploration logging-while-drilling instrument, and belongs to the field of logging. The deep exploration logging-while-drilling instrument comprises a drill collar, a symmetric coil system composed of a plurality of receiving coils and a plurality of transmitting coils is arranged on the drill collar, the drill collar is further provided with a receiving coil and a transmitting coil, and the receiving coil, the transmitting coil and the coils of the symmetric coil system form an asymmetric coil system; the coils are respectively connected with an antenna to forman antenna assembly; and a mandrel assembly is sleeved with the drill collar, a groove and a wire groove are formed in a mandrel of the mandrel assembly, circuit boards are arranged on the groove, andall the circuit boards are communicated through electric wires in the wire groove. The deep exploration logging-while-drilling instrument is of a sleeve type structure and is composed of a drill collar assembly and the mandrel assembly, modular design of the instrument is achieved, the overall asymmetric and locally symmetric antenna structure layout is adopted, and the detection depth and detection precision of the deep exploration resistivity instrument are effectively improved.

Description

technical field [0001] The invention belongs to the field of well logging, in particular to a logging-while-drilling tool for deep detection. Background technique [0002] In order to evaluate complex geological conditions, under the condition of large-scale horizontal well drilling in oilfields, in order to increase the drilling rate, the wellbore trajectory should be kept within the oil layer and the drainage area should be increased. It is urgent to develop a logging-while-drilling tool with functions such as edge detection, integrated gamma ray, pressure measurement, etc., to realize "seeing" far and "seeing" the formation clearly, and to realize simultaneous measurement of various parameters of the formation. Contents of the invention [0003] The object of the present invention is to overcome the shortcoming that the detection depth of the existing logging-while-drilling tool is too shallow, and provide a logging-while-drilling tool for deep detection. [0004] In o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12E21B47/13E21B21/08
CPCE21B47/12E21B21/08
Inventor 陈鹏卫一多王珺朱军杨国华和丽真尤嘉祺代志平闫麦奎刘枭宫璇何晶
Owner BC P INC CHINA NAT PETROLEUM CORP
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