Bestar Steel Co.,Ltd

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bestar steel co., ltd., as one of the subsidiary companies under shinestar, is a dedicated provider and exporter for high performance price ratio smls and welded pipes. bestar has set up extensive international sales network covering middle east, south & east asia, africa and america, etc. as one of the major exporters of octg and line pipe for crude oil and natural gas delivery in china, we topped the export amount of steel pipe among hunan province in 2010 and 2011. and we will keep growing and expanding the global market. our goal is to provide clients with professional & customized service, and become the most reliable solution in steel pipe trade. we look forward to cooperating with you! main products : 1. oil and gas transmission pipe: od: 10.3mm - 1016mm with wall thickness: 1.7mm - 52mm 2. octg products: od: 60.3mm - 508mm with wall thickness: 4.24mm - 16.13mm 3. pipes for pressure use: od: 6mm - 720mm with wall thickness: 1mm - 120mm 4. machining tube and others: od: 6mm - 1200mm with wall thickness: 1mm - 200mm our main products covers seamless carbon steel pipe astm 106/a53 grb, api 5l grb/x42/x46/x52, octg oil casing and tubing api 5ct j55/k55/n80/p110, octg drill pipe api 5dp e75/x95/g105/s135, boiler tube astm a179/a210/a192/a213, low temperature steel pipe astm a333 gr.6, high temperature alloy steel pipe astm a335 p1/ p2/p5/p9/p11/p12/p22/p91. bestar steel co., ltd address: hunan steel industrial zone,no.9 xiangfu road, changsha, hunan, china web:www.bestarpipe.com tel: 0086-731-88678531, 88678532 fax: 0086-731-88678531 e-mail:info@bestarpipe.com professional manufacturer in welded pipe and seamless steel pipe seamless steel pipe,tubing and casing,drill pipe,octg pipe,erw pipe,ssaw pipe,lsaw pipe,welded pipe ,oil and gas pipe

the industry standard when faced with the need for an intermediate-weight drill stem component is the heavy weight drill pipe. to make this drill pipe useful in several various applications, the heavy weight drill pipe is available in standard and spiraled. to improve tube life, reduce hole drag and differential sticking challenges, standard heavy weight utilizes a center upset or wear pad. rdt manufactures welded or integral heavy weight with the option of range ii or iii. there are several specific features and benets to utilizing rdt heavy weight drill pipe for your drilling applications. rdt’s tool joints provide ample space to re-cut the connections, which extends the service life of the pipe by reducing the wear rate on the od. for added assistance in decreasing the od wear on the pipe, our center upset or wear pad offers additional protection by keeping the tube away from the hole. at the same time, it reduces the risk of differential sticking. to help extend the service life of the connection, the api bore back box and stress-relief groove pin feature is the standard we use on our 3-1/2 and larger heavy weight drill pipe. to increase the connection’s ability to resist fatigue cracking we apply cold rolling to the thread roots of all our heavy weight drill pipe connections. as we all know – time is money; for fast and efficient handling on the rig floor, rdt’s heavy weight drill pipe can be picked up utilizing existing drill pipe elevators.

a drill pipe is the backbone of any directional drilling project. this hardy, handy tool may not get all the attention it really deserves, but one cannot deny that it plays a vital role in the success of a project, or its failure! this may be the unsung hero at the drilling rig but it is expensive equipment and it does cost money. a string of drill pipe could be extremely expensive, sometimes costing $25,000 or more (depending on the size, of course). since the drill pipe is among the most expensive wear item for drilling jobs, buying it and maintaining it is a necessity. the market is quite competitive and in spite of the downturn in the economy, the drilling market is booming. so, the demand for drill pipes is pretty high, and there are some factors to keep in mind before buying. there are different kinds of dril1 pipes that one may buy, ranging from the most common integral forged pipe to the press and fit type. just as people conduct research while purchasing other products, the same must be done in the case of a drill pipe too. for instance, the buyer must consider how much power the rig has and what kind of rig they intend to use with the pipe. if the pipe and the rig do not match in size, the buyer is in for a lot of headaches besides waste of money. it is important to make sure that the drill pipe being purchased is strong enough for a particular rig or even for the particular application one has in mind. it is important to use the right grade of pipe. a low quality pipe leads to a lot of fatigue resistance and this factor is highly critical in the drilling industry as the torque limits of the pipe is pushed right to the edge. also, when drilling in a horizontal manner, there are a large number of cyclical forces at work. when buying drill pipes, a percentage of customers always go with the price factor. however, buying cheap may not always be a great idea when it comes to a tool like the drill pipe. some contractors tend to be a little shortsighted here, but one cannot get away with low quality pipe all the time. tough conditions can test the strength of the pipe. if the quality of the pipe is low, disaster can strike at any moment. since pipes are expensive, it is important to take good care of them. maintenance can maximize the life of the drill pipe. even simple actions like rod inspection and regular cleaning yield good results. another important tip is to rotate the drill rods in the rod basket so that the same rod is not the first one to go into the ground always. the above tips can help you make the right purchase and extract the most out of your purchase.

www.besterpipe.com each steel pipe has unique product quality defects in seamless steel pipe production is folded inside the main quality defects are generated during the perforation and can not be eliminated. is folded inside the folding tube inner surface, the appearance is characterized by scaly layer, similar to a closed curve, in addition there are irregular shaped folds. folding in the rolling process is the poor quality of the metal produced when there is excessive segregation of non-metallic inclusions, the pores will be concentrated in the periphery of metallic inclusions, is formed in the perforated inner split folding process, through fixed drive machine it scaly after extrusion or other shapes appears. in short, rolled seamless steel round billet of substandard quality are mainly non-metallic inclusions and harmful substances caused by the high degree of metal contamination. furthermore blank segregation in the blank strip casting quality is extremely important implications. the ribbon segregation depends largely on the chemical composition of steel, insulating state and the cooling rate. steel, increasing the content of harmful elements in the segregation band to promote their concentration increased, thus forming segregation. in addition, the increase in carbon content also exacerbate the segregation of impurities especially manganese. during piercing the following factors also affect the internal fold, 1 fold perforation of internal deformation parameters, produce hot-rolled seamless steel pipe folding a certain relationship with the piercing process, piercing process parameter settings, the tool design, have a certain influence on the generation folding, tube rupture not only with the center roll and the total reduction in the total reduction former head related transfer tube and a half weeks with a partial reduction related. 2, the perforated inner fold temperature effects: with the temperature increasing, the plastic material to improve the critical amount of reduction increases with temperature increase, but if the use of the casting tube optimum casting temperature, the temperature at a perforation within the range of variation is no significant change in off. 3, the heating time and the relationship within the fold, in baked prolonged heating temperature is constant inward folding little effect, but the number has significantly increased the outer fold, because the longer the heating grain grew more powerful, but the surface is more obviously, the organization produced outside the fold performance deterioration. 4, the tool inward fold impact, head inward folding also have some impact, for example, the head can reduce their use of nasal cavity formation and improve the quality of the inner surface, while the shape of the head also have some impact on the quality of the tapered head will from the head to the tip of the hole part of the reduction increases, which have an adverse effect on the waste pipe; spherical head tube is able to ensure that waste reduction is reduced along the feed direction, to improve the quality of waste pipe. the best head shape should be able to ensure that the deformation zone along the length direction of the waste pipe wall thickness reduction unchanged. finally, to improve the quality of the inner surface, to reduce internal aspects should hand off: casting tube to ensure uniformity of the organization, reduce segregation to prevent the excessive concentration of non-metallic inclusions; using optimum casting temperature, to increase the critical reduction; perforation former billet heating temperature decreases guarantee top front reduction, improve the quality of heat tools.