Oil well pipe sleeve scale cleaning method

A technology for oil well pipes and oil pipes, which is applied in the field of scaling cleaning of oil well casings, can solve problems such as poor effect, influence oil field production, damage casings, etc., and achieve the effect of obvious scale removal effect and safe and reliable construction operation.

Active Publication Date: 2018-12-14
大庆荣氏采油技术开发有限公司
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For three-element and polymer flooding production wells (oil wells), mechanical grinding and chemical agents are generally used for casing wall scaling, and the effect is not good.
Mechanical grinding needs to be overhauled, which is costly, time-consuming, and inefficient. The well site occupies a large area and needs to be equipped with a large pool. It can be worn through, causing casing change and affecting oil field production
Chemical descaling, incomplete, takes a long time, pollutes the formation, damages the casing, and affects the normal production of the oil field

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
  • Oil well pipe sleeve scale cleaning method
  • Oil well pipe sleeve scale cleaning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that some words indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific Orientation, construction and operation in a particular orientation, therefore should not be construed as limiting the invention.

[0036] In the description of the present invention, it s...

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 discloses an oil well pipe sleeve scale cleaning method. The oil well pipe sleeve scale cleaning method comprises the following steps: installing and setting a coiled tubing and a high pressure pump; installing a coiled tubing guide rail; installing a wellhead bracket and a wellhead injection head; connecting a ground to the coiled tubing and a Phi 42mm rotating nozzle to test pressure and spraying, wherein the output test pressure of the high pressure pump is 30Mpa, and the spraying test is 35L / min; inputting a Phi 16mm coiled tubing and a Phi 42mm rotary nozzle, starting thehigh pressure pump after the rotary nozzle enters a blowout preventer, pressurizing 15Mpa to test the blowout preventer; continuing to input the coiled tubing and the rotating nozzle, continuing to perform deepening and flushing, and lifting the movable coiled tubing by 5 m after every drilling footage of 10 m, wherein the pump must not be stopped during staying in the well; and continuing to input the coiled tubing to perform flushing after upward movement and dropping of the removed scale in the sleeve are stable is stable. The oil well pipe sleeve scale cleaning method is suitable for sleeve descaling of producing wells in water flooding, ternary composite flooding, polymer flooding and other oil field production manners, and has an obvious descaling effect.

Description

technical field [0001] The invention relates to the technical field of petroleum equipment, in particular to a method for cleaning fouling of oil well casings. Background technique [0002] With the development of tertiary oil recovery, the ASP and polymer flooding methods are gradually popularized. The fouling phenomenon of oil wells in this oil recovery method is becoming more and more serious. The scaling on the casing wall and the inner and outer walls of the tubing is very serious, which seriously affects the normal production of the oil field. At present, there is no effective method for casing descaling. Generally speaking, the more conventional method is to use chemical agents or mechanical grinding. [0003] For three-element and polymer flooding production wells (oil wells), mechanical grinding and chemical agent methods are generally used for casing wall scaling, but the effect is not good. Mechanical grinding needs to be overhauled, which is costly, time-consumi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/00
CPCE21B37/00
Inventor 李德俊刘照轩
Owner 大庆荣氏采油技术开发有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products