Chuancheng Well-Downhole Operations Company's H103 well achieves high-yield industrial gas flow.

China National Petroleum Corporation News (Contributed by Mao Jian) – On April 16, after 2 hours and 35 minutes of meticulous operations, the Chuanqing Drilling Downhole Operations Company successfully completed the composite soil acidizing treatment in the Xuni II section of Well H103. The operation involved injecting a total fluid volume of 228.2 cubic meters, with peak pumping pressure reaching 90 MPa and maximum displacement rate at 2.6 cubic meters per minute. Testing conducted on April 21 confirmed an impressive daily industrial gas flow of 800,600 cubic meters. Located in Huaguan Town, Nanbu County, southern Sichuan Province, Well H103 is a rolling evaluation well strategically positioned within the Zhongtaishan structural feature of the Sichuan Basin. The well is designed as a directional well, having been spudded on September 9, 2018, and fully drilled by January 20, 2019, targeting the Xuni I formation at a total depth of 4,550 meters. The primary objective of this acidizing treatment was to gather critical data on the fluid properties, production rates, and reservoir pressures of the Xuni II section, thereby fulfilling the original drilling objectives for this well. During the acidizing process, the team encountered significant challenges due to the wide span and pronounced heterogeneity of the target reservoir section. Additionally, there were no previously treated wells in the Zhongtaishan block’s Xuni II section, and guidance from neighboring areas proved somewhat limited. Despite these obstacles, Chuanqing Downhole Operations Company rigorously adhered to the detailed construction plan, successfully executing the composite soil acidizing treatment across the 92-meter-long perforated interval. This achievement not only underscores the company’s technical expertise but also provides vital support for unlocking high-yield gas flows from the Zhongtaishan structural feature in the Sichuan Basin.

May 06,2019

Changqing Oilfield Changbei Company's Operation Area 1 TPO Well Station sees a daily production increase of 80,000 cubic meters.

China National Petroleum Corporation News (Contributors: Jiang Yan, Duan Lingliang) "Today marks the first pigging operation conducted on the TPO branch line after process optimization and its integration into the North Main Line," said Li Yang, Manager of Operation Area 1 at Changqing Oilfield's Changbei Company, as he briefed the reporter upon receiving the pig at the Yulin Terminal Station on April 14. "This pigging operation, when accounting for external interference factors, saved a remarkable 200 hours compared to previous procedures, giving us firm control over the critical spring production window." The reporter learned that for years, natural gas produced from older TPO wells and selected well clusters in the Changbei Gas Field has been collected via the TPO branch line before being routed to the Yulin Terminal Station—and ultimately delivered through Shaanxi-Beijing Pipeline No. 1.

May 06,2019

Western Pipeline Installs Warning Signs to Safeguard Pipeline Safety

China National Petroleum Corporation News (Reporter Zhang Pengbo) — From April 21 to 22, the Xining Gas Transmission Station of the Western Pipeline organized personnel to install pipeline orientation warning signs along the high-consequence area of the Chengnan Branch Line. As temperatures gradually rise, construction activities and tree-planting efforts along the pipeline route have noticeably increased, putting additional pressure on pipeline protection efforts. As one of the key high-consequence areas for the Shunqinglan Pipeline, the Xining Gas Transmission Station is now facing a heavier workload in safeguarding the Chengnan Branch Line under its jurisdiction. In response to this situation, the Xining Gas Transmission Station has proactively implemented measures to strengthen pipeline protection, conducting continuous patrols in major construction zones and promptly contacting representatives from construction companies whenever potential hazards are identified.

May 06,2019

Bohai Equipment's "Steel Dragon" debuts in service after being launched into the water in Xiamen.

China National Petroleum Corporation News (Contributors: Li Changwang, Tao Zhiqiang) – In the early hours of April 18, the offshore sinking operation for the 1,374-meter-long, 1,600-mm-diameter seawater pipeline project in Xishui East Diversion, Xiamen City, Fujian Province, was successfully completed. This marks the official start of the pipeline’s more than 30-year underwater service period—a rare feat nationwide, as this section of the "steel dragon" was manufactured by Bohai Equipment Company. The Xishui East Diversion original water pipeline project is a vital public welfare initiative and a key construction project for Xiamen City. It involves laying approximately 15 kilometers of 1,600-mm-diameter pipelines, with the submerged section crossing the waters of Tong'an Bay being the largest-diameter pipeline segment ever constructed using the immersed tube method in Fujian Province.

May 06,2019

Changqing Jing'an Oilfield Accelerates Associated Gas Utilization

China National Petroleum Corporation News (Contributors: Wang Xiqin, Wang Lixia) – In early April, the on-site expansion and renovation project for two light hydrocarbon units under the Third Project Department of the Changqing Jing'an Oilfield's associated gas recovery initiative, along with the upstream closed-loop transformation, officially kicked off. Associated gas refers to volatile light components and impurity gases naturally present in crude oil. Implementing associated gas recovery and utilization has proven to be an effective strategy for Changqing Oilfield as it accelerates its secondary development efforts—helping to reduce energy consumption, cut emissions, promote cleaner production, and enhance overall efficiency. Since 2001, Changqing Oilfield has established its first comprehensive associated gas utilization project at the Jing'an Oilfield: the Jing'erlian Light Hydrocarbon Plant. Over the past two years, Changqing Oilfield has conducted thorough field surveys across its 12 affiliated oil production plants, gaining deeper insights into their specific needs and operational challenges.

May 06,2019

A Behind-the-Scenes Account of Tackling Blockages in Tarim Oilfield's Kuche Mountain-Front Gas Wells

**Issue:** Out of the 25 production wells at the Dina-2 gas field in the Tarim Oilfield, 21 have been diagnosed with "asthma"—a metaphorical term used here to describe severe wellbore blockages. **Cause:** The primary reasons include an incomplete understanding of the nature and mechanisms behind these blockages, inadequate matching of remediation technologies, and ultimately, less-than-ideal results. **Solution:** By shifting from surface-level observations to a deeper, more comprehensive analysis, engineers developed a systematic "1134" approach to tackle wellbore blockages—addressing both the symptoms and root causes simultaneously. **Outcome:** This innovative strategy successfully cleared blockages in 28 wells, proving remarkably effective: every treated well experienced increased production. For instance, as of April 10, the Keshen-805 well, which had been struggling due to severe wellbore blockage, saw its daily natural gas output surge dramatically—from 49,200 cubic meters before intervention to 163,500 cubic meters after continuous coiled tubing operations combined with acid-based wellbore cleaning. Back in late 2017, during the peak winter gas supply period, 21 out of the 25 production wells at the Dina-2 field were affected by varying degrees of foreign-material blockages. Meanwhile, the situation at the Keshen-2 gas field was equally critical: out of 27 total wells, 15—nearly 56%—exhibited abnormal wellbore blockages. These blockages forced gas wells into a state resembling "asthma," where their "breathing became labored," severely curtailing production. In some cases, frequent sand production even led to mandatory well shutdowns. Ultimately, these blockages not only hindered individual well productivity but also posed a significant obstacle to the efficient development of the entire Kuqa Mountain Front gas field complex. Treating wellbore blockages is akin to traditional Chinese medicine—it requires accurately diagnosing the underlying issue, pinpointing the root cause, and prescribing the right remedy. Yet curing this "chronic condition" of gas wells has proven to be a challenging and intricate process. Prior to 2015, researchers initially concluded that the blockages were caused by sand production, leading them to adopt a quick-fix solution: increasing production pressure differentials while perforating oil tubes. While this approach provided immediate relief, it failed to address the root cause, often resulting in recurring blockages—a classic case of "treating the symptom but not the disease." From 2015 to 2018, during major well repairs or coiled tubing operations, technicians began collecting detailed samples from downhole blockages. Their analysis revealed that the deposits weren’t just sand but a complex combination of sand and scale—a breakthrough that fundamentally changed their understanding of the problem. Building on this new insight, engineers developed a proprietary remediation fluid system tailored specifically for dissolving scale while complementing it with mild sand-dissolving agents. This innovative solution not only minimized corrosion risks but also slashed costs by approximately 300,000 to 400,000 yuan per well. Since 2018, researchers have conducted over 500 analytical tests, refining their understanding of blockage types. They now recognize that wellhead samples primarily consist of sand, while downhole samples reveal a mix of sand and scale. Meanwhile, full-wellbore sampling indicates that scale remains the dominant component. Based on these findings, they’ve crafted a robust "1134" suite of technologies: - For wells with partial blockages and existing liquid flow channels, the focus is on **acid-based wellbore cleaning**. - For severely blocked wells lacking any liquid flow pathways, the approach combines **coiled tubing operations with acid-based treatment**. - And for wells where even coiled tubing cannot clear the blockage, the solution involves **targeted acid dissolution at specific well locations**. This "1134" framework represents a refined, evidence-based approach that builds upon "precision therapy," emphasizing a holistic "diagnosis and treatment" strategy. It not only resolved the urgent need to boost gas production during the 2018 winter supply season but has also become a sustainable long-term solution for high-quality development in the Kuqa Mountain Front region. Notably, the Keshen-2-2-8 well, which had been shut down for over six months, served as the first testbed for this "targeted therapy," successfully restoring its daily gas output to 340,000 cubic meters. Since then, the Kuqa Mountain Front has seen a total of 28 wells undergo successful remediation under this advanced system, achieving an impressive average daily production increase of 3.91 million cubic meters of gas and 246 tons of oil per well. Collectively, these efforts have prevented costly major overhauls on 10 additional wells, safeguarding both operational efficiency and long-term resource sustainability.

May 06,2019

Dalian Fangyuan 2019 Campus Recruitment Fair

Dalian Fangyuan Special Cable Manufacturing Co., Ltd. was established in 1986. The company occupies a site of 4,000 square meters, with a building area of 7,000 square meters. It is one of the earliest domestic manufacturers specializing in the production of load-bearing cables for geophysical applications and oil well heating cables. The company is located in the High-Tech Industrial Park of Zhuanghe Economic Development Zone, Dalian City.

Feb 14,2019

China's annual output value of low-voltage cables will exceed 400 billion yuan.

With the advent of the big data era, the volume of information exchange is growing rapidly. As low-voltage cables used in security communications, network communications, and related low-voltage transmission applications, they boast a massive market both domestically and globally.

Jan 21,2019

Chinese SMEs in the wire and cable industry embrace new opportunities.

The power industry has long served as a pillar industry in China, holding a crucial position in the national economy. Since the rapid economic growth of China beginning in the 1990s, the wire and cable manufacturing sector—playing a vital role in the power industry's supply chain—has also experienced robust expansion. Particularly in recent years, as China’s economic development has encountered bottlenecks related to energy and electricity shortages, the country has continuously increased its investment in the power sector, propelling the industry into a period of remarkable growth and advancement.

Jan 21,2019

Market issues in the security wire and cable industry are gradually emerging.

The power industry has long served as a pillar industry in China, holding a crucial position in the national economy. Since the rapid economic growth of China beginning in the 1990s, the wire and cable manufacturing sector—playing a vital role in the power industry's supply chain—has also experienced robust expansion. Particularly in recent years, as China’s economic development has encountered bottlenecks related to energy and electricity shortages, the country has continuously increased its investment in the power sector, propelling the industry into a period of remarkable growth and advancement.

Jan 21,2019