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A method for flushing hollow rods of oil wells

A technology of hollow rod and well washing, which is applied in the direction of wellbore/well parts, earthwork drilling and production, isolation devices, etc., to save hot washing time, save consumption, and achieve good results

Active Publication Date: 2016-06-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is no explanation on how to use the hollow rod well washing device to efficiently and economically heat wash the oil well. The hot washing method is still being explored and carried out by field technicians based on experience.

Method used

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  • A method for flushing hollow rods of oil wells
  • A method for flushing hollow rods of oil wells
  • A method for flushing hollow rods of oil wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: as figure 1 as shown,

[0031] A method for flushing a hollow rod of an oil well, comprising the following steps;

[0032] Step 1. Determine the amount of hot-washing medium used for the hollow-rod well-washing device to be 6V:

[0033] V=V 1 +V 2 ;

[0034] V 1 = π ( d 1 2 ) 2 H ;

[0035] V 2 = π ( D 2 ) 2 H - π ( d 2 2 ) 2 H ;

[0036] In th...

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Abstract

The invention relates to a method for washing a well through an oil well hollow rod and belongs to the technical field of oil production engineering in the petroleum industry. The using amount of a well washing medium for hot washing by applying a hollow rod well washing device is 6 V; onsite construction is conducted; a valve is opened, a hot washing vehicle is started, after drainage operation is completed, the valve is opened, hot washing is started, the using amount of the well washing medium is within first V m<3>, the hot washing pressure is controlled to be within 5.0 MPa, the displacement is controlled to be 2-2.5 m<3> per hour, and the temperature of an outlet of the hot washing vehicle is controlled to range from 60 DEG C to 65 DEG C; when the hot washing medium is V-4V, the hot washing pressure is controlled to be within 5.0 MPa, the displacement is controlled to be 2-2.5 m<3> per hour, and the temperature of the outlet of the hot washing vehicle is controlled to range from 70 DEG C to 75 DEG C; when the hot washing medium is 4V-6V, the hot washing pressure is controlled to be within 5.0 MPa, the displacement is controlled to be 3-3.5 m<3> per hour, and the temperature of the outlet of the hot washing vehicle is controlled to range from 60 DEG C to 65 DEG C; construction is ended.

Description

technical field [0001] The invention relates to a method for flushing a hollow rod of an oil well, and belongs to the technical field of oil recovery engineering in the petroleum industry. Background technique [0002] Qin Guiyun, Liu Xiaobo, Yang Guofeng, etc. published in the 2nd issue of Petroleum Machinery Magazine in 2012, "Research and Application of Hollow Rod Thermal Washing Technology". wash technique. The hollow rod hot-washing device is mainly composed of hot-washing tee, hollow sucker rod, hot-washing check valve, matching polished rod and polished rod sealer, etc. The well flushing check valve adopts the method of side outlet and reserved pocket at the lower part, which greatly reduces the influence of the high pressure of well flushing on the load of the pumping unit, and the dirt in the hollow rod sinks into the pocket, preventing impurities from affecting the well flushing channel. clogged. The field application results show that the hollow rod thermal was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/00E21B36/00
Inventor 付亚荣马永忠刘春平李冬青付丽霞曹瑾李小永姜一超李淼李华君李明王志霞彭菁菁唐敬
Owner PETROCHINA CO LTD