2025

1. Undertook the drying, purging, and pre-cooling projects for the Yanting Natural Gas Processing Plant (China's first full-chain, multi-condition deep-cold processing plant for natural gas). 2. The dehydration and hydrocarbon removal projects for Well Penglai 1 and Well Yongqian 209 have been successfully launched. 3. Secured the contract for the liquid nitrogen pre-cooling operation of the unloading system in Phase I of the Longkou Nanshan LNG Receiving Station project. 4. Won the bid for nitrogen supply and pipeline purging services for ExxonMobil's ethylene project.

2024

1. The natural gas business is growing rapidly, with several projects now operational, including the Dingye 11HF scattered well natural gas recovery station, the Wenqian 4 well flare gas recovery project, the Jinqian 23 well dehydration and hydrocarbon removal project, and the Luye 2 well CNG processing and recovery project. 2. Undertook the pipeline drying, purging, and leak-testing project for Phase I of the Longkou Nanshan LNG Receiving Station. 3. Completed the helium-nitrogen pressure testing and leak detection integration project at the Duokouhe Purification Plant.

2023

1. Hainan Hengding New Energy Co., Ltd. has been officially registered and established in Haikou City. 2. The holding subsidiary, Chongqing Hongdao Hesheng, has been set up to officially enter the CNG loading business.

2022

1. Undertaking the Helium-Nitrogen Co-production Project at the Nanba Natural Gas Purification Plant, Southwest Oil & Gas Field, CNPC 2. Providing nitrogen-injection technical services for the pipe replacement project addressing crack defects in four circumferential welds along the China-Myanmar Pipeline

2021

1. Established Sichuan Host Energy Development Co., Ltd., officially entering the LNG trading, transportation, and other business sectors. 2. Undertook the second-phase engineering project for the process pipeline system cleaning, drying, and purging at the Zhejiang Zhoushan Liquefied Natural Gas (LNG) Receiving and Bunkering Station.

2020

1. Providing emergency nitrogen purging services for pipe replacement and connection at 8 defect welds along the China-Myanmar natural gas pipeline (Guizhou section). 2. Undertaking commissioning work—including air-tightness testing, purging, and nitrogen-based simulated operational trials—at compressor stations along the northern segment of the China-Russia East Line (Heihe to Changchun section).

2019

1. Nitrogen Purging and Commissioning for the Northern Section of the China-Russia East Line Pipeline (Heihe-Changchun Segment) 2. Emergency Nitrogen Purging Following Fire Incident at Valve Stations No. 8 and No. 9 on the Taiqingwei Pipeline 3. Comprehensive Pigging, Drying, and Purging Operations for the Supporting Pipeline Project of the Eastern Guangdong LNG Facility

2018

1. West-to-East Gas Pipeline Nanchang Trunk Line Valve Stations 139–141 Nitrogen Replacement Project 2. Nitrogen Replacement Operation at the Qujing Station on the China-Myanmar Pipeline in Yunnan 3. Purging, Drying, and Nitrogen Replacement Project for Process Piping Systems in Phase II of the Zhejiang Zhoushan Liquefied Natural Gas (LNG) Receiving and Bunkering Terminal Project

2017

1. Emergency Repair Project for Natural Gas Pipeline Explosion in the Qinglong Section of the China-Myanmar Pipeline 2. Oil Pushing and Route Adjustment Project for the Yinxin Railway, Gansu Section, by Xi'an Northwest Pipeline Company 3. Phase I Nitrogen Displacement and Air Tightness Testing at the Golden Compressor Station for the Chuanqi East-to-East Pipeline Boosting Project

2016

1. Emergency Response Project for the Explosion on the Enshi Section of the Sichuan Gas-to-East Pipeline 2. Technical Service Project for Emergency Nitrogen Injection and Relocation in Response to the Incident at Valve Station No. 42 of the China-Myanmar Natural Gas Pipeline

2015

1. Undertook the supporting service project for Sinopec's Fuling shale gas nitrogen operations, opening up new market opportunities in Fuling shale gas applications such as fiber-optic testing, gas lift, and stuck-pipe release using nitrogen injection services. 2. Completed the liquid nitrogen replacement and inspection service project at the gathering station of PetroChina Changqing Oilfield’s No. 6 Gas Production Plant. 3. Executed the purging, pigging, drying, and pre-cooling projects at CNOOC’s Yue Dong LNG Receiving Terminal, thereby expanding into the business markets for LNG terminal purging, pigging, and drying services.

2014

1. Undertaking the nitrogen displacement project for the Jiuquan section of the West Third Line of the Western Pipeline 2. Executing the pre-cooling project for the LNG unloading pipeline at CNOOC's Hainan LNG terminal

2013

1. Undertook the nitrogen injection project for the China-Myanmar natural gas pipeline commissioning. 2. Completed the pre-cooling project for the LNG unloading pipeline at CNOOC Hainan Natural Gas Company, opening up the market for nitrogen pre-cooling services at LNG receiving stations. 3. Executed the compressor commissioning project at the compressor station along the Sichuan-to-East Gas Pipeline (including air-tightness testing, purging, and nitrogen-based simulated trial runs).

2012

1. Undertaking Sinopec Jianghan Drilling and Fracturing Project 2. Completing the construction of the 10.5-billion-cubic-meter-capacity gathering and transmission system facilities and well sites in the Greater Bay Area block, along with the coordinated commissioning of nitrogen systems (including the Phase 4 production launch in the Maoba-Dawan area of the Puguang Gas Field).

2011

1. Undertook the auxiliary engineering work for tank-opening inspections of natural gas spherical tanks at Deyang Natural Gas Company and Jiangyou Hongfei Company, thereby expanding into the market for natural gas spherical tank inspection services. 2. Completed construction on acid fracturing and nitrogen co-injection projects associated with the Puguang Gas Field, Yuanba Gas Field, and the Jianghan Southwest Project (Chongqing region).

2010

1. The company has acquired six core equipment items for the first time, including liquid nitrogen heating pump trucks and skid-mounted liquid nitrogen pump trucks, and has obtained licenses for hazardous chemical operations and road transportation of dangerous goods, enabling it to provide comprehensive nitrogen-related technical services. 2. We are undertaking the construction task of integrated leak testing, purging, pre-coating film application, and intelligent inspection for the 10.5-billion-cubic-meter-capacity gas gathering station and pipeline system at the Puguang Gasfield. 3. We are also responsible for constructing the nitrogen purging project connecting the Puguang gas field to Shanghai as part of the Sichuan-to-East Gas Pipeline Project.

2009

1. Undertaking the nitrogen injection project for the commissioning of the second West-to-East Gas Pipeline (Western Section) 2. Executing the pressure testing and purging tasks for eight integrated equipment pipelines at the Puguang Gas Field Purification Plant

2008

1. Undertook the construction task of fracturing over 160 gas wells in the Sulige Gas Field in Inner Mongolia, involving simultaneous nitrogen injection and gas lift operations. 2. Completed the nitrogen displacement work for commissioning the second West-to-East Gas Pipeline.

2007

Sichuan Host Oil and Gas Technology Co., Ltd. was officially unveiled and established in Chengdu, and the company has customized its first set of nitrogen displacement equipment.