PetroChina's Offshore Pipeline Project Sets Record

　　On June 11, the multi-functional modular seabed trencher independently developed by China Petroleum Pipeline Administration completed the laying of more than 100 kilometers of pipelines for Bangladesh's first marine pipeline project and 6 sea-land directional drilling crossings.
It has created two world records of sea-land directional drilling crossing and deep trenching behind the channel
.

　　Bangladesh's first marine pipeline project is a key project of the "Belt and Road", with a total length of 146 kilometers, and six sea-land directional drilling crossings are to be completed
.
Usually, the buried depth of submarine pipelines is generally 1.
5 to 3 meters, reaching 5 meters below the seabed, which is already a difficult project in the industry
.
Because the submarine pipeline crosses the channel, the deepest burial depth is 11 meters, and the construction difficulty is unprecedented in the history of world marine engineering
.

　　"We have independently innovated and transformed the trencher equipment to achieve a maximum post trenching depth of 11.
9 meters, and also conquered the underwater millimeter-level docking technology of offshore single-point mooring devices
.
" Sun Bijun, Bangladesh Project Manager of China Petroleum Pipeline Engineering Co.
, Ltd.
According to the introduction, they also adopted the original offshore reaming and dragging process for the first time, and the success rate of one-time crossing was 100%
.

　　The project uses China's self-developed "Shenlong 3" multi-functional modular seabed trenching machine, and uses 3D sonar and shallow formation profiler to monitor trenching data to ensure that the formation and burial depth of the submarine trench meet the requirements
.
In order to ensure that the engineering installation is foolproof, the project also uses technical equipment such as high-precision flange measuring instruments and high-precision underwater positioning systems that exceed the industry level to realize the millimeter-level docking of the key devices of the underwater 30-meter single-point mooring system and the submarine pipeline.
, which fills the technical gap in the installation and operation of the dual-channel single-point mooring system
.
After the project is put into operation, it will solve the problem that Bangladeshi oil tankers over 100,000 tons cannot be docked to unload oil
.

　　Xue Feng, general manager of China Petroleum Pipeline Bureau Engineering Co.
, Ltd.
, said that the creation of these two world records marks the core key technologies and key technologies of Chinese enterprises in complete sets of business fields such as large-scale subsea pipeline laying, sea-land directional drilling crossing, and single-point mooring system installation.
The installation capacity has reached the world advanced level
.