﻿ 钻井平台钻屑正压输送装置设计及应用

# 钻井平台钻屑正压输送装置设计及应用Design and Application of Positive Pressure Conveying Device for Drill Cuttings in Drilling Platform

Abstract: With the improvement of environmental protection requirements in the oil industry and the promotion of non-landing operation mode of mud, higher requirements were put forward for the transportation of oil-based solid waste cuttings in well completion from offshore drilling. Due to the problems of waste drip leakage, low automation, short transmission distance and cumbersome installation and maintenance in the traditional unconfined transportation, it was urgently needed to adopt more environmentally friendly and efficient transportation methods. Therefore, a closed positive pressure continuous delivery device was developed. The device was composed of a vibrating feed hopper, a transfer chamber, isolation valve, a purge system and an automatic control and detection system. The flexible transmission of pipeline could be realized by using pressure gas as power source. The equipment included many kinds of detectors for detecting the running condition in real time. The control system could realize the function of automatic control and automatic fault alarm. The experimental results and field application results show that the device can fully meet the high requirements of oil-based cuttings transportation on offshore platform.

1. 引言

2. 钻屑正压输送装置设计

2.1. 正压输送系统的设计计算

${G}_{L}{}_{L}=\frac{0.25\cdot {{\rho }^{\prime }}_{L}}{t}=41538\left(\text{kg}/\text{h}\right)$

${G}_{L}=\frac{{G}_{L}{}_{L}}{N}=1597\left(\text{kg}/\text{h}\right)$

$V=\alpha \sqrt{{\rho }_{L}}+B{L}_{Z}^{2}=22.26\left(\text{m}/\text{s}\right)$

$D=\frac{1}{53.1}\sqrt{\frac{{G}_{L}}{N\cdot {{\rho }^{\prime }}_{L}\cdot V}}=0.92\text{\hspace{0.17em}}\text{m}$

2.2. 装置组成

Figure 1. The diagrammatic sketch of equipment structure

2.2.1. 料斗组件

2.2.2. 输送罐组件

2.2.3. 自动控制系统

2.3. 装置工作原理

Figure 2. The diagrammatic sketch of equipment principle

3. 现场应用及试验研究

Table 1. The transport capacity parameters at different intervals

Table 2. The transport capacity parameters at different blowing times

4. 结语

1) 提出了一种钻进平台钻屑输送的方法，设计了一套正压密闭输送装置。该装置具备自动化控制、高效率传输、占地少、环保等级高等优点。

2) 现场试验应用结果表明，该装置性能优秀，能够大幅降低人员的工作量，满足平台对岩屑输送的高要求。

3) 通过试验数据的对比，当吹扫时间设定为10 s时，最优间隔时间为3 s；当吹扫间隔时间设定为3 s时，最优吹扫时间为13 s。

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