Application of Titanium in Onshore Oil and Gas Exploration and Development

Oil and natural gas exploration and development can be divided into land mining and offshore mining. The oil and natural gas stored in the crust accounts for roughly 60% on land and 40% offshore. The oil and gas in the offshore crust such as the Bohai Sea and the South China Sea are also exploited. significant.

Before the industrialization and large-scale application of titanium alloys, the commonly used logging instrument casings were made of 45 steel, 40Cr steel, and 30 MoVNb steel, but none of them could meet the needs of modern technical logging, modern high-tech oil and gas exploration And development requires that the metal casing of the logging tool can not only withstand the pressure of > 98 MPa, but also resist the corrosion of underground crude oil and various media, and in the logging, it must also have a small absorption rate of natural gamma rays. , and should not have a shielding effect on the geomagnetic field. From these performance requirements, Ti 15V-3Cr-3Sn-3Al Titanium Strip is good materials for making logging tool housings.

How to use the mechanical and physical properties of titanium in titanium processing

(1) The elastic modulus of titanium is relatively low relative to its tensile properties, so a larger springback allowance must be considered in the pressing and roller operations. It is precisely because of the lower elastic modulus that in order to achieve the same degree of stability, the cross-section of the titanium part is slightly larger than that of the same steel part.

(2) Titanium is easy to machine, but considering its seizure tendency (larger than stainless steel) and low thermal conductivity, it is necessary to appropriately improve the commonly used machining technology and the design of threads and bearing surfaces. At least a rigid machine tool, a sharp tool, a slow speed, a large amount of cutting, and room for chip removal are also recommended. It is also recommended to use a large amount of cooling lubricant.

(3) The thermal expansion coefficient of titanium is 75% of that of carbon steel. Special attention should be paid to this when combining these two materials in equipment design and manufacture.

(4) Since titanium is an active metal, when heated to above 600 °C, it is easy to combine with oxygen in the air, so it is generally not recommended for long-term use of Titanium Alloy Threaded Rod above this temperature.

(5) When the temperature of industrial pure titanium exceeds 150~200℃, the mechanical strength decreases rapidly.

(6) The diffusion rate of hydrogen in titanium exhaust flange is faster than that of oxygen, so before hot working, the heating furnace used should have a slightly oxidizing atmosphere, so that although a relatively thin oxide film will be produced, it avoids the possible damage caused by hydrogen. Deep pollution.

(7) The softer industrial pure titanium plate is easy to be cold formed after annealing treatment; the harder industrial pure titanium and Ti2.5Cu require medium temperature processing, and the processing temperature for Ti6Al4V is preferably 600~700℃.

(8) Composite plates can be obtained by explosive welding of thin titanium plates and thick steel plates, which can be used to manufacture high-pressure, high-temperature vessels and heat exchangers. But it is not economical to use it to replace the whole titanium or the titanium lining plate of the suit.

Technical extrusion characteristics of titanium screw hydrostatic

Hydrostatic extrusion technology has a history of nearly a hundred years. However, in the process of large-scale and industrialization, the development speed has been slowed down due to the limitation of higher-strength structural materials. The practical application of this technique has been facilitated with advances in materials science. The use of hydrostatic extrusion technology to extrude Titanium Hex Nut has outstanding advantages. In recent years, superconducting materials have developed in the direction of large sections. Due to the increasingly high requirements for continuous steepness, the size and weight of the ingot must be increased. In this way, it is difficult to use ordinary extrusion equipment, and the use of hydrostatic extrusion technology has many advantages.

During metal processing, it is desirable that the workpiece be in a state of triaxial compressive stress, as this facilitates the plastic deformation of the metal and eliminates surface cracks and defects in the product. In addition, it is also required to be in a good lubrication state during processing to reduce the loss of function. If the hydrostatic extrusion technology is used, the above two purposes can be met.

1. The hydrostatic extrusion of Titanium Elbow is in the process of frictionless deformation. The friction between the ingot and the extrusion cylinder is the main obstacle to metal deformation. When hydrostatic extrusion is used, the high-pressure liquid separates the ingot from the wall of the extrusion cylinder, and at the same time, some high-pressure liquid enters the die hole, and the extruded product is also separated from the die wall. Therefore, the friction coefficient can be as low as 0.01 or less, which also greatly reduces the power loss and improves the surface accuracy of the product.

2. Increase the length of the bad ingot of the titanium screw In the traditional extrusion method, 50% of the extrusion force is used to overcome the friction force between the ingot and the extrusion wall. The magnitude of the friction force is proportional to the toughness of the ingot. Therefore, the length of the ingot is limited. If hydrostatic extrusion is used, it is in a frictionless extrusion process, therefore, the length of the ingot can be increased. For example, for the same tonnage extruder, the output of hydrostatic extrusion can be more than three times higher than that of ordinary extrusion.

Application of Titanium in Pharmaceutical Industry

The pharmaceutical industry is an important industry related to people's physical and mental health, including pharmaceuticals, medical machinery, sanitary materials and other fields, and occupies an important position in the national economy. Grade 1 Pure Titanium Plate is widely used in the pharmaceutical industry because it is non-toxic and harmless, and has good compatibility with the human body.

In pharmaceutical production, because the production of drugs is inseparable from acids, alkalis and salts, pharmaceutical equipment is easily damaged by corrosion. The use of steel equipment not only cannot solve the problem of serious equipment corrosion, but also causes a lot of loss of human, material and financial resources, affecting normal production. The use of titanium welding filler wire solves this problem very well.

The processing flow of titanium rod from sponge titanium to rough is as follows:

(1) Compression electrode, the sponge titanium is pressed through a press to form a dense sponge titanium pressed block electrode

(2) Vacuum casting, under the conditions of 1700~1800℃ and -103pa, the above-mentioned sponge titanium pressed block electrode is vacuum casting three times;

(3) Open the billet. Under the condition of 1000 ℃, the billet is opened by the hydraulic press, and the Z is finally pressed into a square billet; when the billet is opened, it should be noted that the life of the titanium rod is reduced due to the high pressure, so when the closed die F9 Titanium Forging method is used. When forging titanium rods, closed die forging must strictly limit the volume of the original blank, which complicates the preparation process. Whether to use closed die forging or not, it must be considered in terms of interest and process feasibility. During open die forging, the loss of burrs accounts for 15%-20% of the weight of the blank. The technological waste of the clamping part (if necessary to keep this part according to the die Titanium Threaded Forged Fitting conditions) accounts for 10% of the weight of the blank. The relative loss of burr metal is usually The weight of the blank has been reduced and increased. Some forgings with asymmetric structures, large cross-sectional area differences, and difficult to fill local forgings. The burr consumption can be as high as 50%. Closed die forging has no burr loss, but the blanking process is complicated and needs to be added. More transitional grooves will undoubtedly increase auxiliary costs.

(4) For the first rolling, under the condition of 970~980℃, the roughness of cylindrical shape is initially rolled by a rolling mill

(5) The second rolling, under the condition of 950 ℃, use a rolling mill to make a blank. There are many rolling methods, which can be classified according to different characteristics. Extrusion is classified according to the characteristics of metal flow and deformation, including forward extrusion, reverse extrusion and special extrusion. Special extrusion includes hydrostatic extrusion, continuous extrusion, lateral extrusion, co-extrusion, compound extrusion, sheath extrusion, peeling extrusion, water-sealed extrusion, bitter die extrusion, powder extrusion, semi-extrusion Melt extrusion, liquid extrusion, etc. Extrusion is classified by temperature, including hot extrusion, warm extrusion and cold extrusion. Hot extrusion and cold extrusion are the two major branches of extrusion. Hot extrusion is mainly used in metallurgical industry systems, which is commonly known as extrusion; cold extrusion is used in mechanical industry systems; the development of warm extrusion is relatively late, and the scope of application is also small.

The influence of laser welding on the surface treatment of titanium rods!

The process parameters of laser welding are difficult to grasp, because the thermal efficiency fluctuates greatly during the welding process, and the surface condition of the welded titanium rod has a great influence on the thermal efficiency: the brighter the surface, the larger the emitted laser light, and most of the laser energy is reflected to other objects , In the form of "heat" to the surrounding materials or media. But the thermal efficiency will suddenly change. Before the titanium metal rod is melted, only about 10%-20% of the light energy is absorbed by the astm b348 titanium rod and heats the titanium metal rod. When the temperature rises to the melting point of the weld metal and starts to melt, the light absorption rate of the titanium metal rod increases sharply . The titanium rod company tells you that at this time, about 60%-80% of the light capacity is absorbed by the metal, and the sudden change in the thermal effect can easily cause the weld to burn through.

In order to avoid or reduce this adverse effect, that you can take corresponding measures, such as welding Grade 1 Titanium Bar; roughening the surface, using pulsed laser beams; adjusting the input energy; adjusting the spot size; changing the attenuation wave Pulse width and steepness.

A natural ruby ​​crystal containing aluminum oxide and dissolved in a low concentration of chromium atoms is used as the working material of the laser generator, which is called a solid-state laser generator. If CO2 is used as the working substance of the laser generator, it is called the force gas laser generator.

At present, the power of the laser welding machine is only kilowatts, and the price is expensive, the welding cost is high, and the application range is not wide. It is only used for the solder joints of some small parts in the manufacture of some instruments and meters, especially when some solder joints are hidden and cannot be welded by ordinary welding methods. Multi-station welding can be realized by using laser beam, optical fiber and deflection prism.