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High efficiency response to sticky sliding vibration of the adaptive drill bit release

With the development of the oil industry, the focus of oil exploration and development gradually turned to deep wells, ultra-deep wells, such as China's Sichuan, Tarim and other blocks have a lot of oil resources in the deep strata. With the increase in depth, the hardness and plasticity of the rock increases, the drillability deteriorates and the drilling speed decreases. Field drilling data show that the average depth of drilling in the deep section is only 15% to 30% of the average machining rig of the upper section, and is still below this value in some areas. The results show that the viscous sliding vibration is one of the important reasons for the decrease of the drilling rate.

Downhole failures often lead to inefficient drilling and costly tool failures. More than half of the time in the drilling operation will be accompanied by sticky slip phenomenon, drill string sticky sliding vibration is caused by underground drilling and drill bit premature failure of the important reasons. BT Carbide has introduced the industry's first adaptive drill-TerrAdapt, an adaptive drill that reduces the frequency of downhole failures through its own automation and greatly increases the economic benefits of drilling. With the industry's first self-adjusting cutting depth control element, the TerrAdapt drill bit can adjust its own attack according to the specific situation of the formation it is drilling, thereby reducing vibration, viscous slip and impact loads. From the operator's point of view, this means faster and more smooth drilling and longer tool life, can significantly reduce the non-production time.

DOC is usually defined as the axial distance of biting into the formation in a rotation. Control of the DOC can eliminate stick slippery vibration, the formation of high-quality smooth borehole, to avoid premature failure of cutting teeth to extend the life of the drill bit. Drilling Cut The DOCC (DepthofCutControl) technology was introduced at the beginning of the shock in order to reduce the shock, and with the development of the fixed tooth PDC bit, faced with a single drill bit to complete a well in different well drilling (at the same time to meet in some wells need to eliminate sticky slip In some wells are demanding high drilling requirements) challenges, therefore, a reasonable application of DOCC technology to optimize drill bit drilling performance, become the focus of major companies.

Often, most of the wells will be drilled with many different strata, each type of rock are different, but the current PDC bit design is often only a fixed set of DOC control settings, are only one of them A certain rock type is optimized for drilling. Drill in the transition of different types of rock often produce vibration, resulting in sticky slip effect, so fixed DOC drill in some areas may be smooth drilling, but in other areas is very easy to behave very unstable and inefficient.

When the drill string stagnates, the drill bit stops rotating; at this point, the drill string continues to twist under the rotation of the turntable, and when the energy accumulated in the drill string is sufficient to overcome the friction torque between the drill and the formation, the drill bit will double or Several times the speed of the turntable to speed up the rotation, the bottom of the drilling tool oscillation intensified, the drill torque is also violent fluctuations. Deep well drilling process, the underground lithology changeable, heterogeneity is serious, the drill bit in the bottom of the road by the larger resistance torque, intermittent Bie Diao drilling and drill pipe longitudinal vibration frequently, these factors are caused by drill bit teeth, Cutting teeth, bearing failure, downhole tool damage the main reason, seriously hampered the drilling speed. In this case, the operator would have to choose to replace the drill.

The TerrAdapt bit incorporates a self-adjusting DOC element that automatically extends to the formation of the best DOC according to the formation and avoids vibrations and slippage effects when drilling a different rock type or well. After drilling the slippery effect, the component can be recovered and restored to the maximum ROP for drilling. These components also buffer any sudden impact on the bit surface, reducing damage to the TerrAdapt drill bit cutter and other BHA hardware and electronic components.

"I believe that the TerrAdapt adaptive drill bit will give the user a huge change," said BT Carbide's vice manager of the drill bit. "The slippery effect causes millions of dollars a year to our users, and now we can easily To solve this problem.With the thought of how to reduce the consequences of sticky slip effect, it is better to focus on another key point - fast drilling, zero failure.

Recently, the TerrAdapt drill bit in the Delaware Basin proved its strength by improving the ROP. Drill through the same set of sandwiches, the TORAdapt bit has a 27% increase in the ROP of the ROP, the torque change is reduced by 90%, the slippage effect is greatly reduced, the drilling footage is increased by 713 feet (27%), and the energy spent is less than that of the conventional PDC drill A lot of

Tungsten mainstream prices stable tungsten market showed have price no deal

Into this week, China's domestic tungsten prices have slowed down in the relevant institutions and large-scale tungsten after the market, the market support prices rose a single power, only the raw materials market reluctant to sell and cheap to buy, it is difficult to support the market to obtain further Breakthrough, tungsten market overall turnover showed no market situation. In recent days, the mainstream price of tungsten goods is relatively stable, tungsten concentrate is difficult to purchase is still one of the main factors driving price increases, although the price has risen, but the actual turnover of the market is limited, choose few manufacturers shipped, the market has No market price is more obvious.

Most of the goods said that the shortage of goods, cover plate reluctant to sell the phenomenon of common, and downstream businesses for the high price will also be weak, rear tungsten iron, cemented carbide powder and other prices to follow up slowly, resulting in tungsten prices fell again into a "bottleneck" status. At present, the supply and demand sides are more cautious operation, trading enthusiasm is not high, although some holding businessmen continue to optimistic about the market outlook, that tungsten also has a certain upside, but the actual market or to be good news and the actual transaction to follow up.

According to the National Bureau of Statistics website, China National Bureau of Statistics released today in March 2017 the national consumer price index (CPI) and industrial producer price index (PPI) data show that CPI fell 0.3% qoq, up 0.9% ; PPI chain rose 0.3%, up 7.6% year on year. In this regard, the National Bureau of Statistics City Division senior statistician Raiders were read. Rope National Day, said 2017 - March CPI rose slightly over the same period, PPI gains down.

First, the consumer price chain fell, year on year increase slightly

From the chain, in March --- CPI fell 0.3%, mainly due to more food prices fell. Food prices ring - down 1.9%, affecting the CPI chain fell 0.39 percentage points. The prices of fresh vegetables, eggs, pork, poultry and fresh fruit fell by 7.9%, 4.0%, 3.5%, 2.1% and 1.2% respectively. The above five items affected the CPI by 0.37 percentage points, of which 0.21 percentage points were affected. Non-food prices rose 0.1%, affecting the CPI rose 0.08 percentage points. Among them, clothing and health care prices were up 0.6% and 0.5%, the two total impact of CPI rose 0.09 percentage points.

From the same period, the March CPI rose 0.9%, or 0.1 percentage points increase over the previous month. Non-food prices rose 2.3%, or 0.1 percentage points increase over the previous month. Among them, health care, living, education, culture and entertainment, transportation and communication prices rose 5.3%, 2.4%, 2.3% and 2.0%, respectively, the total impact of CPI rose 1.44 percentage points. Food prices fell 4.4% year on year, the decline over the previous month to expand 0.1 percentage points. Among them, fresh vegetables prices fell 27.9% year on year, affecting CPI fell 0.95 percentage points year on year.

It is estimated that in March 0.9% year on year increase, last year's price hikes of about 0.4 percentage points, the new price factor is about 0.5 percentage points. In March, the core CPI excluding food and energy rose 2.0%, roughly the same as the previous two months, to maintain a steady trend.

Second, industrial producer prices fell

From the chain, PPI rose 0.3% in March, or 0.3 percentage points lower than in February, or three consecutive months down. Among them, the means of production prices rose 0.5%, or 0.2 percentage points lower than last month; living prices rose from last month to flat this month. From the major industries, one is coal mining and washing, oil processing, oil and natural gas extraction industry prices rose from the rise, down 0.6%, 0.6% and 0.1%; Second, non-ferrous metal smelting, carbide and calendering Processing, chemical raw materials and chemical manufacturing prices were up 0.5% qoq, or more than last month fell 1.5 and 1.4 percentage points; third is the ferrous metal mining, ferrous metal smelting and rolling processing industry prices were up 4.8% 2.4%, or more than last month to expand 2.6 and 0.1 percentage points.

From the same period, in March PPI rose 7.6%, or 0.2 percentage points lower than in February, or in five consecutive months after the expansion began to fall. In the survey of 40 industrial categories of industry, 33 industry product prices rose year on year, the same as the previous month. From some key industries, the price increase year on year prices have eased. Among them, coal mining and washing industry prices rose 39.6%, or the same as last month; oil and natural gas mining industry prices rose 68.5%, or 16.8 percentage points lower than last month; ferrous metal smelting and rolling processing industry prices rose 36.8% Down 3.3 percentage points; oil processing industry prices rose 29.9%, down 0.6 percentage points; non-ferrous metal smelting and rolling processing industry prices rose 17.3%, down 2.2 percentage points; chemical raw materials and chemical manufacturing prices rose 11.5%, down 0.4 percentage point. The six industries together affect the PPI rose about 6.1 percentage points year on year, accounting for 80.3% of the total increase.

It is estimated that in March of 7.6% year on year increase, last year's price hikes of about 5.8 percentage points, the new price factor is about 1.8 percentage points.

China's domestic tungsten prices steady strong supply and demand stalemate

At present, China's tungsten raw materials is still the key to affecting the entire market, China's domestic tungsten prices remain stable and stable situation. But the raw materials are not flow is an abnormal phenomenon, the downstream demand to follow up significantly slow, although the market sentimental sentiment is rich, but also be alert to the risk of the market outlook.

Recently, a large-scale tungsten enterprises in Jiangxi Province, China has made a purchase inquiry, black tungsten concentrate price of 78,000 yuan / ton, white tungsten ore offer 76,000 yuan / ton. Tungsten concentrate market, although the spot, but by environmental protection, season, market sentiment and many other factors, most of the tungsten mines and trade enterprises are not shipped. Affected by this, China's mainstream smelters in Jiangxi Province began to try to quote up, high offer has reached 123,000 yuan / ton, the current market has not yet been recognized.

Although the tungsten concentrate market in China there is a certain supply gap, but the downstream market demand performance is not ideal. In addition to some large-scale enterprises to purchase a long single, bulk cargo market overall turnover is still relatively lonely, after all, the downstream smelting plant for high-priced raw materials to accept the limited capacity. Tungsten ore raw materials market price squeeze, smelter is difficult to offer, there are some smelters began not offer.

Overall, China tungsten prices temporarily higher positions, but the downstream procurement and cover positions more cautious, supply and demand stalemate, the risk of the market outlook or have expanded, companies need to always pay attention to market trends.

China's complex super-hard materials products market size continues to grow

Superhard materials mainly refers to diamond and cubic boron nitride. Diamond is currently known as the world's hardest material, the other C60 hardness may be no less than diamond, but not yet conclusive. Cubic boron nitride hardness after diamond. The hardness of these two superhard materials are much higher than the hardness of other materials, including cemented carbide, including abrasive materials corundum, silicon carbide and tool materials, carbide, high speed steel and other hard tool materials. Therefore, the superhard material is suitable for the manufacture of other materials processing tools, especially in the processing of hard materials, with unparalleled superiority, occupy an irreplaceable important position. Because of this, superhard materials in the industry has been widely used. In addition to the tools used to manufacture, superhard materials in the optical, electrical, thermal aspects of some special performance, is an important functional material, has aroused great attention, this performance and use are constantly being research and development The

According to the data, with the downstream application market demand continues to expand, composite superhard material downstream demand showed a rapid growth trend. Monitoring data show that the current domestic superhard materials and products output value of about 1: 3-1: 6, with the downstream composite superhard materials products market size continues to grow, composite superhard materials market demand with the expansion, which High-grade diamond market demand for the proportion of the market is about 60-70%.

China's superhard materials and products market in 2015 reached 68.2 billion yuan, 2010-2011 compound annual growth rate of 22.6%. In the high-speed, high efficiency, high precision and green processing to become the mainstream trend of the situation, with the product grade and added value to enhance the import substitution speed, is expected to market size and growth rate is expected to further expand.