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Method for calculating parameters of spring in pipe cleaner with controllable pipe cleaning speed

A calculation method and a pigging technology, applied in the field of spring design, can solve problems such as the inconvenience of the design or selection process, and achieve the effects of increasing adaptability, efficient pigging, and ensuring safe production

Pending Publication Date: 2020-09-29
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the internal spring parameters of the pig with controllable pigging speed, so as to solve the problems of inconvenient design or selection of the internal spring when the designer or engineer controls the running speed of the pig

Method used

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  • Method for calculating parameters of spring in pipe cleaner with controllable pipe cleaning speed
  • Method for calculating parameters of spring in pipe cleaner with controllable pipe cleaning speed
  • Method for calculating parameters of spring in pipe cleaner with controllable pipe cleaning speed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1 provides a cleaning pipe with controllable pigging speed, and its structure will be described in detail below.

[0067] refer to figure 1 , the cleaning pipe with controllable pigging speed includes a pig body with a hollow structure, one end of the pig body is provided with a tapered hole, and a jet nozzle 1 is arranged on the tapered hole, and the pig body There are two support frames 2, an internal spring 3, a fixing nut 4 and a bypass control valve 5 inside.

[0068] Among them, two support frames 2 are fixed inside the pig, and the bypass control valve 5 is a valve with a "T" shape in cross section, including a longitudinal valve stem and a transverse valve head, and the end of the longitudinal valve stem is perpendicular to the transverse valve head Fixed connection with the middle of the transverse valve head,

[0069] The bypass control valve 5 is connected to the pig body through two support frames 2, and the longitudinal stem of the bypass contr...

Embodiment 2

[0074] Embodiment 2 provides a method for calculating the internal spring parameters of a pig with a controllable pigging speed, which is used to design or manufacture the internal spring of the pig with a controllable pigging speed in Embodiment 1. The calculation method includes the following steps :

[0075] Step S1: Determine the basic parameters of the pig before stress simulation

[0076] Set the lower limit value V of the speed range of the pig in a stable operating state d =2m / s, the early warning speed value V under dangerous working conditions after the pig is blocked l =1m / s, measure the production gas velocity V of the pig in the steady state g and pipeline pressure P;

[0077] Set the lower limit value and early warning speed value of the pig in the pipeline;

[0078] Step S2: Stress simulation of the pig and setting of boundary conditions;

[0079] The analytical equation expression of the running speed of the pig in the pipeline is:

[0080]

[0081] Am...

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Abstract

The invention discloses a method for calculating parameters of a spring in pipe cleaner with the controllable pipe cleaning speed. The method comprises the steps: determining basic parameters of a pipe cleaner before stress simulation; carrying out stress simulation of the pipe cleaner and setting of boundary conditions; analyzing the stress state of the internal spring, and calculating key parameters of the internal spring; selecting an internal spring material, primarily selecting the spring size, and performing checking and the like. The spring designed according to the calculation method of the internal spring parameters disclosed by the invention can adapt to speed fluctuation caused by multiple hindrances of the operation of the pipe cleaner; the adaptive capacity of the pipe cleanerrunning under complex conditions is improved, and the running speed of the pipe cleaner is effectively controlled, so that a powerful guarantee is provided for achieving the purposes of high efficiency, safety and stability of pipe cleaning operation of an oil and gas production system.

Description

technical field [0001] The invention relates to the technical field of spring design, in particular to a method for calculating internal spring parameters of a pig with controllable pigging speed. Background technique [0002] The pipe pig, also known as the pipeline pig, is a tool used to clean the pipe wall and monitor the internal conditions of the pipe by means of its own power or driven by oil and air flow to move in the pipe cavity. Pigging work is an important link in the production of long-distance pipelines such as oil and gas, and it is also the most basic and effective measure to ensure the effect of pipeline transportation. The running speed of the pig in the pipeline, referred to as "pig speed", the pig speed control is of great significance for optimizing the pigging operation and enhancing the pigging effect. The pigging speed determines the pigging effect of the pig. When the pigging speed of the pig is kept constant, the pigging effect is the best. Among t...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F119/14
CPCG06F30/17G06F2119/14
Inventor 李清平刘永飞朱军龙姚海元郑利军李焱王君傲王清陈海宏
Owner CHINA NAT OFFSHORE OIL CORP