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While-drilling down-hole measurement for substance in stratum

A material and formation technology, applied in the field of downhole measurement, can solve the problem of neglecting the cross flow in the well

Inactive Publication Date: 2009-07-22
PRAD RES & DEV LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art acknowledges the difficulty of maintaining a balance between the drilling mud and the formation, and the need to avoid mixing of drilling water from one level to another, but ignores the possibility of cross flow in the well

Method used

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  • While-drilling down-hole measurement for substance in stratum
  • While-drilling down-hole measurement for substance in stratum
  • While-drilling down-hole measurement for substance in stratum

Examples

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Embodiment Construction

[0019] refer to figure 1 , shows a measurement-while-drilling device that may be used in a practical embodiment of the invention. [As used herein, unless otherwise indicated, measurement while drilling (also referred to as measurement while drilling or logging while drilling) is intended to include: Borehole Cords) for measurements in Earth boreholes. ] The platform and iron tower 10 are located above a borehole 11 formed in the earth using rotary drilling. A drill string 12 is suspended within the borehole and includes a drill bit 15 at its lower end. A drill string 12 and a drill bit 15 attached thereto are rotated by means of a rotary table 16 (powered by means not shown) engaging a drive drill rod 17 at the upper end of the drill string. The drill string hangs from a hook 18 attached to a moving block (not shown). The drive rod is connected to the hook via a swivel 19 which allows the drill string to rotate relative to the hook. Alternatively, the drill string 12 and ...

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Abstract

The invention relates to a method which utilizes drilling fluid which flows downwards along with a drilling string and comes out along with the drill bit with rock debris produced by drilling stratum and then returns to the surface of the earth from an annular space between the drilling string and a drilling well to measure matters in the stratum at the periphery of an earth drilling well drilled by the drill bit at the end part of the drilling string, comprising the following steps: waiting for that any matter dissolved in the drilling mud is substantially balanced with any matter in the stratum rock debris; and then measuring matters dissolved in the drilling fluid underground.

Description

[0001] References to related applications [0002] The subject matter of the present application is related to that of co-pending U.S. Patent Application Serial No. 11 / 558,648, (File 60.1626 US NP) of A.B. Andrews, J. Tarvin, and K. Stephenson, filed on the same date as the present application, and Transferred to the same applicant as the current application. technical field [0003] The present invention relates to downhole measurements of material in earth formations surrounding each earth wellbore during the drilling process. Background technique [0004] Prior to the introduction of logging-while-drilling (LWD) tools and measurements, analysis of cuttings and mud-gas logs were the primary formation estimation techniques used during drilling. Mud-gas logging became less important with the advent of LWD, but it has recently regained prominence as operators have been able to extract valuable reservoir information not available with other relatively inexpensive methods. ...

Claims

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Application Information

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IPC IPC(8): E21B49/00
Inventor 肯尼思·E·斯蒂芬森杰弗里·A·塔文
Owner PRAD RES & DEV LTD
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