Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for predicting build-up rate of bottom hole assembly

A bottom hole assembly and prediction method technology, applied in directional drilling, special data processing applications, instruments, etc., can solve problems such as inconvenience for on-site personnel to use, and achieve the effect of high build rate prediction accuracy

Inactive Publication Date: 2017-05-10
SINOPEC SSC +2
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of using the "drilling trend angle" to evaluate the drilling trend of the bottom hole is that the method considers more comprehensive factors, and it comprehensively considers the influence of various factors such as the drilling tool structure, drilling parameters, bit characteristics and formation properties. , but its disadvantages are the same as the "drill bit lateral force" method, it is not convenient to guide the field personnel to use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for predicting build-up rate of bottom hole assembly
  • Method for predicting build-up rate of bottom hole assembly
  • Method for predicting build-up rate of bottom hole assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention will be further described below in conjunction with specific examples.

[0047]A well drilled in an oilfield has a depth of 5236m, a horizontal section length of 1362m, a maximum inclination of 88.1°, and an azimuth of 160°. During the horizontal section drilling, use the "double centralizer" conventional drilling tool assembly: Ф152.4mm PDC drill bit × 0.25m + double female joint × 0.38m + Φ148mm centralizer × 1.41m + Ф120mm short drill collar × 5.88m + Φ147mm centralizer × 1.41m + Ф120mm non-magnetic drill collar × 9.17m + Ф120mm drill collar × 9m + Ф101.6mm drill pipe, applied drilling pressure 40 ~ 80kN, the actual drilling slope rate is -2.13 ~ 2.37° / 100m, achieved good stability Oblique drilling effect, see figure 1 is shown by the solid black line in . Other relevant parameters are: Drilling fluid density 1.45g / cm 3 , the borehole expansion rate is 4%, the target layer dip angle is 3°, and the formation dip is 10°.

[0048] In order to c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for predicting the build-up rate of a bottom hole assembly. The method comprises the following steps that firstly, a laboratory test method is adopted for measuring anisotropic indexes of a drill bit and a stratum or real drilling history data are utilized for obtaining the anisotropic indexes of the drill bit and the stratum in an inversion mode; secondly, influence of the various factors of the bottom hole assembly structure, drilling process parameters, the borehole geometrical shape, the anisotropy of the drill bit, the anisotropy of the stratum, the dip angle of the stratum, inclining tendency of the stratum and the like is comprehensively considered, and a relation between the drilling tendency angle Ar and the borehole curvature Kh is established; and thirdly, let the Ar be equal to zero, back calculation is conducted on the borehole curvature Kh, and at the time, the borehole curvature Kh is equal to the build-up rate of the bottom hole assembly. According to the method, the factors are considered comprehensively, the precision for predicting the build-up rate is high, and a novel theoretical basis and analysis means are provided for optimization design for bottom hole assemblies for complex structural wells in future.

Description

technical field [0001] The invention relates to a method for predicting the build-up rate of a bottom drilling tool assembly during the design and construction of complex wells, and belongs to the technical fields of oil and gas drilling, geological exploration and mine drilling. Background technique [0002] Wellbore trajectory control has always been an important task in the drilling process. The rational configuration of the bottom hole assembly structure and the selection of drilling parameters are the basis for the smooth progress of this work. For a long time, relevant experts and scholars at home and abroad have carried out a lot of research work on the mechanical analysis of the bottom hole assembly, the analysis of the interaction between the drill bit and the formation, and the calculation of the build-up rate of the drilling tool, and have achieved many scientific research results. [0003] Regarding the evaluation and prediction of the drilling trend of the drill...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E21B7/06G06F19/00
Inventor 赵洪山牛洪波唐洪林崔海林刘晓兰夏文安曹继飞李亚男王朔张晶晶
Owner SINOPEC SSC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com