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Advantages of Oil Base Drilling Fluid and Its Development History in China

Oil-based drilling fluid has such remarkable advantages as strong inhibitive ability, high temperature tolerance, good pollutant resistance, oil gas reservoir protection, good lubricating property, strong corrosion resistance, etc., has experienced the development history from crude oil, water-free oil base (diesel), water in oil (diesel), low colloid water in oil, low toxicity water in oil and water-free oil base (white oil), and presently serves as a primary means in drilling deep well, highly-deviated well, horizontal well and various complex strata. Since 1980s, oil-based mud is successively used at oilfields of Huabei, Xinjiang, Zhongyuan, Daqing, etc. Oil-based mud has a rather limited application in China due to its high cost, but many foreign countries have always been using oil-ba

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Development history of water-based drilling fluids in China’s oil drilling industry

During the period of 1920s~1960s, water-based drilling fluid was used. At that time, water-based drilling fluid was rather simple and the main type in this stage was dispersed water-based drilling fluid. (1) From 1921 to 1922, barite and iron oxide powder were used as weighting materials. (2) In 1926, bentonite was used as suspending agent. (3) In 1930, sodium tannate, the earliest mud treatment agent, was developed. (4) From 1931 to 1937, various mud measuring instruments were developed and the requirements on mud performance control were put forward. (5) From 1944 to 1945, Na-CMC (carboxymethyl cellulose) was applied as filtrate reducer in drilling fluid. (6) In 1955, FCLS (ferric chrome lignin sulfonate) was applied as thinner in drilling fluid. (7) Since the 1960s, a coarse dispersed w

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Current situation of drilling waste treatment and equipment development trend in foreign countries

Now, all major oil countries consider the development of drilling waste treatment technologies quite significant, and have had a head start in relevant treatment devices and equipment. Countries like U.S., Canada, France, etc. adopt four-stage solids control equipment in collecting drill cuttings and sludge, and later solidify or transport the subsequent waste. Due to its complex composition, strong stability, various birthplaces and different quality of well drilling waste, one fixed device and process cannot work effectively to manage all waste waters from different oilfields. Besides, conventional devices and techniques highly rely on chemical agents and cost much to manage different wastewater featured with high suspension, high COD, high salt, high chromaticity, etc. Those play a dete

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Temperature is an important control parameter in sewage treatment process.

Temperature is an important control parameter for sewage plants, especially in the North. In response to changes in temperature, sewage plants should take the initiative to manage operations rather than passively make adjustments. Only by understanding the laws of nature and the microbial habits, can we better utilize the characteristics of activated sludge, so that the sewage treatment can reach the standard under the environmental conditions as temperature changes. Sewage treatment relies heavily on the activities of microorganisms. When the water temperature rises by 10 degrees Celsius, the microbial activity will double. When the influent temperature is high and the microbial activity is doubled, the degradation ability of the microorganisms increases after the microbial activity incre

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Treatment effects of dual-deck linear shale shaker and mud circulation process in HDD projects

KOSUN double-deck linear shale shaker can achieve four treatment effects: 1. Can be used as a two-stage shale shaker; 2. The lower screen can be used as a shale shaker and the upper screen as an underflow shaker of desander; 3. The lower screen can be used as a shale shaker and the upper screen as an underflow shaker of desilter; 4. The lower screen can be used as an underflow shaker of desander and the upper screen as an underflow shaker of desilter. Thus, it can be used under various operating conditions for different treatment effects, which can achieve multiple functions, greatly reduce cost and save installation space. Recycling process: centrifugal pump transports mud from mud pit into logging tank of shale shaker. After being treated by coarse screen of shale shaker, large cuttings

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What are the working principles and main features of KOSUN single screw pump?

Screw Pump is an ideal pump used to feed drilling fluids to decanter centrifuge since drilling fluids is pushed to proceed along axial direction evenly. Therefore, the inner flow speed is kept low, volume unchanged and pressure stable so that vortex and agitation are prevented. Screw Pump is useful for wet mud drilling waste management and cuttings transportation. KOSUN single screw pump consists mainly of two parts engaged with each other like threads. The rotor is a rod-shaped part having an external thread, and the stator is a sleeve-like part having an internal thread. When the stator and the rotor are engaged with each other, a series of mutually non-intersecting sealed chambers are created which continuously advance from the suction end to the discharge end as the rotor rotates. KOSU

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Why is KOSUN DN series electronic ignition device favored by the market?

The electronic ignition and combustion device, designed and manufactured by Xian KOSUN, is a kind of treatment facility for tail gas and vented natural gas in refinery plants and natural gas gathering transportation stations. As safe and environmentally friendly equipment, it can ignite and burn vented harmful flammable gases to eliminate their hazards to environment and safety. Moreover, the ignition device can also be used along with drilling mud-gas separators in the area of petroleum drilling engineering. As a fairly matured product, it has been extensively applied in oil and gas fields in Xinjiang and Sichuan Provinces of China, Iran, Egypt, Venezuela, etc. The ignition device mainly consists of DN200 (or DN150) gas burner (torch), GDH-2 electronic igniter, igniting tools (including l

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China May Build the Third West-East Natural Gas Transmission Pipeline.

According to a report, in order to meet the strong demand for natural gas in its vibrant eastern coastal region, China may build the third West-East Gas Pipeline. The report said that the third West-East Gas Pipeline will be laid from Xinjiang in western China, and terminal may be in Fujian Province in southeastern China. It will transport natural gas from Xinjiang to the Yangtze River Delta and the Pearl River Delta with more energy consumption in China. A few days ago, an official from the planning department of China National Petroleum Corporation, a state-owned oil giant in China, said that CNPC would announce a preliminary plan for laying the third West-East Gas Pipeline early next year. The length of the project may be similar to that of a natural gas pipeline that CNPC started to bu

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What is the process of reclaiming water reuse as a sewage treatment method?

In order to meet the water discharge quality standard of the treated sewage, the reclaimed water reuse equipment is generally used to treat the sewage to meet the reclaimed water quality standard. The technological process of reclaimed water reuse can be commonly divided into three stages: pretreatment stage, main treatment stage and aftertreatment stage. 1. Pretreatment stage: this stage mainly has two processing units, where one is a grid, and the other is a regulating pool, which are mainly used to effectively remove solid impurities in sewage and uniformly process the water quality. 2. Main treatment stage: at this stage, the dissolved organic matter in the sewage will be effectively removed, so this stage is the most critical link. 3. Aftertreatment stage: the main function of this st

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