Method for analyzing overflow leakage early-warning trend during trip-out operation and trip-in operation of well drilling

A technology of trend analysis and overflow, applied in wellbore/well components, earthwork drilling, measurement, etc., can solve problems such as untimely and complex calculations

Active Publication Date: 2019-05-03
SICHUAN YONGSHENGXIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the existing problems of complex calculation, slowness and untimely overflow monitoring and early warning during tripping of drilling wells, the purpose of the present invention is to provide a method for detecting overflow and leakage during tripping and tripping of wells. Method of early warning trend analysis

Method used

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  • Method for analyzing overflow leakage early-warning trend during trip-out operation and trip-in operation of well drilling
  • Method for analyzing overflow leakage early-warning trend during trip-out operation and trip-in operation of well drilling
  • Method for analyzing overflow leakage early-warning trend during trip-out operation and trip-in operation of well drilling

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Embodiment 1

[0068] Such as Figure 1~3 As shown, the method for performing early warning trend analysis of overflow and leakage during drilling and tripping operations provided in this embodiment may, but is not limited to, include the following steps.

[0069] S101. Obtain the actual grouting amount after each string of drill pipes is pulled out, and calculate the grouting difference of each string of drill rods according to the following formula: grouting difference Δ=actual grouting amount−theoretical grouting amount.

[0070] In the step S101, as figure 1 As shown, when drilling and tripping, it can be based on image 3 The workflow shown enables the signal acquisition controller 7 to automatically identify and judge a series of tripping actions such as the state of pulling out of the drill and unblocking, the degree of lifting, the lifting of the position, and the jamming, so that the drill pipe can be automatically counted when it is lifted to the position number of bars. Optimal...

Embodiment 2

[0085] Such as figure 1 with 4 As shown in ~ 5, this embodiment provides a method with the same inventive concept as the technical solution of Embodiment 1 and performing overflow and leakage early warning trend analysis during drilling operations, which may but not be limited to include the following steps.

[0086] S601. Obtain the actual displacement of each column of drill pipe after running in, and calculate the difference in drainage of each string of drill pipe according to the following formula:

[0087] In the step S601, as figure 1 As shown, when drilling downhole, it can be based on Figure 5 The workflow shown enables the signal acquisition controller 7 to automatically identify and judge a series of drilling actions such as the state of drilling and unblocking, lowering height, lowering to the position, and sitting stuck, so that the number of drill pipe strings can be automatically counted when the lowering is in place. Optimally, in the step S601, it is pos...

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Abstract

The invention relates to the technical field of well drilling, and discloses a method for analyzing the overflow leakage early-warning trend during trip-out operation and trip-in operation of well drilling. Through the method, a novel method for analyzing the overflow leakage trend through mud variable quantity is provided, that is, on the one hand, related influence factors in the well drilling construction process are comprehensively surveyed, on the other hand, by applying an advanced computer technology and an intelligent algorithm and by applying an original fuzzy mathematical processingmethod and a trend analysis algorithm, the mud overflow leakage trend during trip-out and trip-in of well drilling can be quickly identified after the grouting amount or the liquid drainage amount ofeach drilling rod is obtained recently, the original cognitive limitation is broken through, the problems of complex, slow and untimely computation of current overflow monitoring early-warning are solved, the industry gap can be filled, the novel monitoring method and means are provided for existing well-drilling construction safety, and the international leading level is achieved.

Description

technical field [0001] The invention belongs to the technical field of drilling, and in particular relates to a method for analyzing the trend of overflow and leakage early warning during drilling and tripping operations and during drilling and tripping operations. Background technique [0002] During the drilling process, overflow is unavoidable. Overflow is the precursor of well kick and blowout. If overflow is found early, measures can be taken in time to avoid serious damage caused by well kick or blowout and protect personnel and equipment. Safety. During the drilling process, especially during the tripping process, overflow is prone to occur. According to statistics, the probability of overflow is as follows: the drilling process accounts for 40%; the tripping process accounts for 55%; other operations account for 5%. Improper handling of overflow will cause well kick or blowout. [0003] In order to balance the formation pressure, sufficient drilling fluid column pr...

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Application Information

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IPC IPC(8): E21B47/00
Inventor李璞孙光鹏涂茂川郭元恒陈天成江红
OwnerSICHUAN YONGSHENGXIANG TECH