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Through-drill string conveyed logging system

A technology of equipment and wellbore, applied in drilling equipment, wellbore/well components, measurement, etc., can solve problems such as electrode shape and direction obstruction

Inactive Publication Date: 2003-09-03
斯鲁比特有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of this system is that the passage of the electrode from the nozzle is hindered by the shape and orientation of the nozzle

Method used

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  • Through-drill string conveyed logging system
  • Through-drill string conveyed logging system
  • Through-drill string conveyed logging system

Examples

Experimental program
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Embodiment Construction

[0029] In the drawings, the same reference numerals denote the same components.

[0030] Referring to Fig. 1, there is shown a drill pipe 1 for drilling a wellbore in an earth formation, the drill pipe 1 has a retaining ring 3, and a drill bit 5 provided with a cutting element 6 is connected to the retaining ring. The drill pipe 1 has a longitudinal channel 7 for the circulation of drilling fluid, which leads into a fluid chamber 9 of the drill bit 5 . An injection port 11 is provided in the drill bit 5 for injecting drilling fluid from the cavity 9 into the wellbore. The drill bit 5 has a bottom wall 14 with a central bore represented by an opening 16 which is covered by a closure represented by an insert section 18 . The opening 16 and the insertion section 18 have a frustoconical contact surface 17 so that the insertion section 18 can be removed from the opening 16 in the outward direction. The insert section 18 and the drill bit 5 are provided with a latching mechanism f...

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PUM

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Abstract

A device for drilling and logging of a wellbore formed in an earth formation is provided. The device comprises a logging tool string and a drill string having a longitudinal channel for circulation of drilling fluid, the drill string including a port providing fluid communication between the channel and the exterior of the drill string, the channel and the port being arranged to allow the logging tool string to pass through the channel and from the channel through the port to a position exterior of the drill string. The device further comprises a removable closure element adapted to selectively close the port, wherein the logging tool string is provided with connecting means for selectively connecting the logging tool string to the closure element.

Description

technical field [0001] This invention relates to an apparatus for drilling and logging boreholes formed in an earth formation. The invention also relates to a drill pipe for use in the apparatus and a logging tool rod for use in the apparatus, and a method of drilling and logging a borehole formed in a formation using the apparatus. Background technique [0002] US Patent 5589825 discloses an apparatus in which a logging tool rod is lowered through a longitudinal fluid passage of the drill pipe until the logging tool is located opposite a plurality of windows provided in the drill pipe wall. Logging signals are passed from the logging tool into the formation through the window. Only limited logging information can be obtained with this known device because of the limited window size. In addition, this equipment requires precise positioning of the logging tool relative to the window. [0003] US Patent 3112442 discloses an apparatus in which a logging tool is passed throug...

Claims

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Application Information

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IPC IPC(8): E21B10/04E21B10/62E21B47/00E21B47/01
CPCE21B10/62E21B47/00E21B47/01
Inventor 道弗·约翰尼斯·鲁尼亚
Owner 斯鲁比特有限责任公司
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