3/8'' 1/4'' 1/2'' Stainless Steel Capillary Coiled Steel Tubing For Oilfield Downhole

Experience

The Oil & Gas sector represents one of our principal markets for supply of a wide range of tubular product forms and materials. Our products have been successfully used in some of the most aggressive subsea and downhole conditions and we have a long proven track record of supplying products that meet the strict quality requirements of the Oil & Gas and geothermal energy sectors.

Improvements in the technology for the enhanced exploitation of oil and gas fields has increasingly required the use of long continuous lengths of stainless steel and nickel alloy tubulars for hydraulic control, instrumentation, chemical injection, umbilical and flowline control applications. The benefits of this tubular technology have resulted in reduced operating costs, improved recovery methods and reduced capital expenditure by connecting downhole valves and chemical injection with remote and satellite wells to a fixed or floating central operating platform.

Manufacturing Range

Coiled tubing is available in a range of different product forms depending on the customer requirements. We manufacture seam welded and redrawn, seam welded and floating plug redrawn and seamless tube products. The standard grades are 316L, alloy 825 and alloy 625. Other grades of stainless steel in duplex and superduplex and nickel alloy are available on request. Tubing can be supplied in the annealed or cold worked condition.

• Welded and drawn tubing.

• Diameter from 3mm (0.118”) to 25.4mm (1.00”) OD.

• Wall thickness from 0.5mm (0.020”) to 3mm (0.118”).

• OD tolerance +/- 0.005” (0.13mm) and +/- 10% wall thickness. Other tolerances are available on request.

• Coil lengths up to 1500m (5,000ft) without orbital joints depending on product dimensions.

• Coil lengths up to 13,500m (45,000ft) with orbital joints.

• Encapsulated, PVC coated or bare line tubing.

• Available on wooden or steel spools.

Applications

We offer coiled control line in stainless steel and nickel alloys.

Our products are used in the following applications:

• Downhole hydraulic control lines.

• Downhole chemical control lines.

• Subsea control lines for hydraulic power and chemical injection.

• Smoothbore control lines used in fibre optic applications.

Quality Considerations

When specifying the type of tubing for a particular environment several factors should be taken into account. The most important criteria influencing this decision will be pressure capability and risk of corrosion. A seamless tube that has been cold worked and annealed has a completely homogeneous crystalline wrought structure. The strip material used to make a welded tube is of the same form but this becomes a cast structure at the weld, which could corrode preferentially to the surrounding tube. Through the combination of cold work and subsequent annealing the weld metal can be re-crystallised, transforming this area to a wrought structure resulting in a homogeneous cross-section with equal corrosion potential all around the tube similar to a seamless tube. Sinking goes a long way to achieving this recrystallisation of the cast weld structure into a partially homogenised annealed structure. The extra work in the weld area imparted by passes of drawing processes ensure full re-crystallisation.

In theory the pressure capability of tubing made by the welded and annealed method should be the same but it is common practice in design codes to down-rate welded tubing due to the risk of an imperfect weld leading to weakness. The strains involved in a following redrawing operation will establish the quality of the seam weld and any centre-line weakness will be exposed and detected by visual inspection and/or pressure testing. Therefore the seamless welded and sunk and welded & sunk/plug drawn tubes have the same pressure rating which is superior to that of welded tubing.

Other considerations that can affect the type of tubing specified are surface roughness, compatibility with compression fittings, tolerances, concentricity, length and, of course, price. Welded tubing has a smooth OD & ID finish except for the bead, which can be pronounced in the weld area. This can cause problems with compression fittings. Welded & sunk tubing has a smooth OD surface making it suitable for use with compression fittings but a somewhat rougher bore condition due to sinking and a pronounced weld bead on the ID only. Welded & plug drawn and seamless tubes have a smooth OD surface together with a uniform bore surface with no protruding weld bead.

Tubes made by welding from strip are generally more concentric than seamless tubes, where the uniformity of wall thickness is dependent on the concentricity of the first piercing into hollow form. However, seamless tubes will meet standard commercial tolerances such as those in ASTM A269.

Generally longer lengths can be made by seam welding from strip than can be obtained by drawing down from seamless hollows. These lengths can be further extended by sinking or plug drawing. Where very long lengths are required individual coils can be butt welded together using autogeneous orbital welding, each weld being radiographically examined to ensure that it is free of defects and the complete line is then subject to a pressure test. Welded and redrawn type tubing will need far fewer joints than a seamless line of the same overall length, which leads to significant cost savings.

Advantages of Redrawing Welded Tube

Long lengths can be made by seam welding formed strip but such tubing has OD & ID discontinuity and may suffer from local problems of mechanical strength or corrosion. A welded & sunk tube improves these aspects and has been proven reliable in service over several decades for offshore applications. Although more expensive than welded only tubing, the welded and redrawn tube is still relatively inexpensive compared to Seamless.

Seamless tubing has cross sectional uniformity however, it is the most expensive method of manufacture and has a limitation in the continuous length that can be produced between joints. For a slight premium over the welded & sunk price, tubing can be produced by the welded & floating plug drawn process which results in a product of similar appearance to seamless but with the significant advantage of much longer continuous lengths and greatly reduced costs.

Quality Assurance

Process and quality control of our products is critical in respect of consistently achieving the highest standards in critical Oil & Gas applications. Strict quality control is applied at every stage of the processing operations. Individual quality plans tailored to the customers’ project requirements can also be incorporated into our product quality.

The control line is 100% dimensionally inspected and eddy current tested to international ASTM or DIN standards. All lines are 100% hydraulically pressure tested before being released and certified. Any orbital joints are also radiographically tested in a minimum of 3 planes to ensure the quality of the joint.

We have BS EN ISO 9001 and BS EN ISO 14001 approvals as well as individual client approvals.

Control Line Pressure

The working pressure for a tube depends on the operating conditions of each particular application and the factor of safety required. This can be determined only by the customer and is expressed as a proportion of either the yield pressure or the nominal burst pressure of the tubing. These are the values that raise the stress to the theoretical yield point or the ultimate tensile strength for the material.

Safe working pressures have traditionally been expressed as a proportion of either the tensile strength or yield point of a tube. Different industries and pressure vessel codes have adopted different practices.

Quality assurance

The quality of our products for the control line in oil and gas sector is assured not just during the controlled manufacturing process but also by way of finished product testing. Typical tests include:

• Non-destructive tests

• Hydrostatic tests

• Surface finish controls

• Dimensional accuracy measurements

• Flare and coning tests

• Mechanical and chemical property testing

Control line properties

Product form: Seam-welded & Redrawn is autogenously welded and redrawn supplied in the annealed condition.

Note: Duplex 2205 and Super Duplex 2507 tubing are not list, and they are available on request.

Zhangjiagang Bonded Area Yaxin Precision Tube Co., Ltd.

Zhangjiagang Bonded Area Henglong Steel Tube Co., Ltd.

Long-term adherence strict quality control, uphold the "scientific management to create first-class products, promote the comprehensive development of continuous improvement, quality service to win customer satisfaction," the quality and continuously forge ahead, creating enterprise independent quality brand; uphold the integrity of the first with partners closely aligned. We sincerely hope that the friendly cooperation with the community, work together!

Zhangjiagang bonded zone Yaxin precision pipe making Co., Ltd., Zhangjiagang bonded zone Yaxin Auto Parts Technology Co., Ltd.

Zhangjiagang Free Trade Zone Yaxin Precision Steel Pipe Co.,Ltd.and Zhangjiagang Free Trade Zone Yaxin Auto Parts Technology Co.,Ltd.is a Sino-foreign joint venture company,established in 1999,located at Taiwan Road,Free Trade Zone,Zshangjiagang City,jiangsu Province.It is borderend by international mertropolis city-Shanghai to the east,the beautiful ancient city Suzhou to the south ,jiangyin Changjiang River Bridge to the west ,and international port-Zhangjiagang port to the north.The company covers the area of 200000㎡，of which constructiong area is 8500㎡ ,is has 15 million U.S.dollars (about 96 millon RMB)of registered capital,260million RMB of fixed assets,and its annual output is 30,000 tons of precision seamiess steel pipe ,precision welded pipe 50,000 tons.The company currently employs 500 people ,of which more than 60 have higher education ,more than twenty have senior titles or above .Our main products are cold rolled and cold drawn precision seamless steel pipes ,of which more steel pipes for automobile,Precision welded pipe for automobile.
The company has eamed great reputation among many well-known large business customers by our modern hardware facilities,independent designed special mould and unique production process;and by our standardized managenmen and strict management procedures;and by our business philosophy of"Honesty ,cooperation andcommon development".Our products are widely used by Shanghai Huizhong Sachs Shock Absoorber Co.,Sacths Automotive Components Systems (shanghai)Co.,Ltd.,ZF Chassis Technology-rich Mining Austria (Changchun)Co.,Ltd.,dongfeng ZF Shock Absonrher Co.,Ltd,Shanghai Huizhong Automotive Manufactuing Co.,Ltd.,FAW Tokico Shock Absorber Ltd.,Zhuzhou Nanfang Yamaha Shock Absorter Co.,Tenneco(Beijing)Co.,Ltd.
The company passed the ISO9001 quality system certification in 2008 ,obtained Special equipment manufacturing license(TS2710J44-2013)in 2009,Passed PED certified of TUV NORD in 2011,passed ISO14001 and OHSAS18001 management system certification of DNV in 2012,and was rated as a high-tech enterprise in 2013.Under the fierce market competition ,the company closely centers around the quality policy of"creating first-class products by scientific management,promoting overall development by contstant improvement and satisfying to the custorners"tokeep forging ahead ,further perfecing all kinds of equipments to dvelop the high quality brand for the company.
The company sincerely hopes that we can get friendly cooperation with all circles of the community.

Zhangjiagang Bonded Area Henglong Steel Tubes Co., Ltd.

Zhangjiagang Bonded Area Henglong Steel Tubes Co., Ltd. is a Sino-foreign joint ventrue company,estabilshed in 1999,located at Taiwan Road,Free Trade Zone,Zhangjiagang City,Jiangsu Province.It is bordered by internationgal metropolis city-Shanghai to the east,the beautiful ancient city Suzhou to the south ,Jiangyin Changjiang River Bridge to the west ,and internationgal port-Zhangjiagang port to the north .It embraces convenient land and water transportation,hospitable weather,god-blessed land rich in culture and talented people .Thereby the company enjoys a great geographical advantage.The company covers the area of 200000㎡，of which construction area is 8500㎡.It has 15 million U.S.dollars (about 96 million RMB)of registered capital,260million RMBof fixed assets,and its annual output is 145,000 tons of seamlell steel pipes.
The Company specializes in producing various types of steel,such as10、20、20G、35、45、16Mn、ST52、40Cr、37Mn5、D9MnD、40Mn2、15CrMoG、12Cr1MoVG、08Cr2ALMo、12CrMo1、T11、T12、T22、T23、T5、T9、SA179、SA192、SA106B、SA210C.Main prouducts are different types of seamless steel pipes ,for example ,steel pipes for structure,fou transmission fluid,for low and medium pressure boiler,for petrleum cracking ,for high pressure fertilizer equipment ,high pressure boiler.The outer diameter of the pipe is from 6 to 133mm,wall thickness is from 0.5 to 16mm.Our products are widely used in industry of machinery manufacturing ,ship engineering ,petrochemical,and pressrue boiler.
The company has eamed great reputaion among many well-known large business customers by our modern hardware facilities,independent designed sepcial mould and unique production process;and by our standardized management and strict management procedures;and by our business philosophy of"Honesty,cooperation and common development".
The company passed the ISO9001 quality system certification in 2008,obtained Special Equipment Manufacturing License(ts2710j44-2013)in 2009,passed PED certified of TUVNORDin2011,passed ISO14001and OHSAS18001management system certification of DNV ,AND was rated as a high-tech enterprise in2012.Unedr the fierce market competition,the company closely centers around the quality policy of"creating first-class products by scientific management ,promoting overall development by constant improvement and satisfying the customers"to keep forging ahead,fruther perfecting all kinds of equipment to develop the high quality brand for the company.The company sincerely hopes that we can get the friendly cooperation with all circles of the community.