| Customization: | Available |
|---|---|
| After-sales Service: | 1year |
| Warranty: | 1year |
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About Yj One-Way Shock Absorber
The YJ type one-way shock absorber (bumper) is used during drilling operation. It helps to absorb any shock and vibration originating from the drill string while drilling. The benefits of using the shock absorber are firstly, it helps to enhance service life of drill bit and drill tools, secondly, it improves drilling speed and efficiency, and finally, it aid in prevention against bit bounce in drilling operation.
The one-way shock absorber effectively absorbs and reduces shock and vibration in the drill stem by means of elastic deformation of the hydraulic oil under external force. Its main advantages are its simple structure, its reliable working performance and its ease of operation and maintenance.
Working Principle
The hydraulic shock absorber is connected between the drill bit and drill collar. During drilling operation, the torque is transferred from top of drill string to the absorber's mandrel. The spline will then transfer the torque through the spline outer barrel, oil cylinder and lower sub to drive and rotate the drill bit.
Weight on bit is the total amount of downward force exerted on the drill bit from the top of the drill string. Significant weight on bit is required for the drill bit insert to efficiently drill into the formation to break rocks into pieces. The drilling mud is fed through the bore of drill pipes and collars into the mandrel of shock absorber and finally ejected into the well bottom through the lower sub bore of the shock absorber.
During drilling, because of the uneven well bottom condition and structure of the cone bit, the different force components mentioned above are exerted on the drill bit and drill string resulting in severe vibration. The hydraulic shock absorber will thus absorb the vibrational energy by means of compressing and deforming the compressible fluid under pressure. The shock absorber can reduce the vibration and impact load on the drill tools.
| Model | YJ46C | YJ62C | YJ70C | YJ80C | Y94C |
| Product Code | 1408000 | 1410000 | 1413000 | 1415000 | 1417000 |
| O.D. (mm) | 121 | 160 | 178 | 203 | 241 |
| I.D. | 38 | 47 | 57 | 64 | 70 |
| Max.Stroke (mm) | 100 | 120 | 120 | 150 | 150 |
| Max.Bit Weight (kN) | 250 | 343 | 392 | 450 | 540 |
| Tensile Strength (kN) | 1000 | 1500 | 1500 | 2000 | 2000 |
| Ambient Temperature (°C) | -40~150 | -40~150 | -40~150 | -40~150 | -40~150 |
| Connection | NC38 | NC46 | NC50 | 6 5/8 REG | 7 5/8 REG |
| Pull-down Overall Length (mm) | 3760 | 4100 | 3800 | 4100 | 3820 |
| Weight (kg) | 247 | 400 | 560 | 740 | 1100 |
Tianhe Oil Group is an integrated corporation engaged in petroleum equipment design, manufacture, sale, rental, and maintenance, oil engineering services and oilfield exploration and development.Tianhe Oil Group has 5 business scopes throughout 50 countries and regions as follows:
Taking advantage of the geographical logistics of Shanghai Free Trade Zone and Yangshan Port, Shanghai Tianhe undertakes processing on giving materials or samples, seeking the common development of diversified forms such as cooperation or joint venture, both domestically and internationally.
Over the years, Tianhe Oil Group, regarding "people-oriented, technology first, continuous improvement, casting brand" as our management guidance, continuously strives to innovate and improve our products and expand business related to oilfield. Meanwhile, The company also increases investment in technology research and development, always takes providing the global customers with the best technical products and services as our company's mission.
Tianhe Oil Group strongly believes and promotes Total Quality Management, implement the ISO quality management system and HSE management system and API Standard, which has been deeply implanted into every person's thought and carried out into every aspect of work.
Our manufacturing facilities are well equipped with four automated induction heat treatment lines and dozens of other types of heat treatment ovens and well furnaces to ensure full coverage of heat treatment requirements by different products to achieve the required mechanical properties.
In order to ensure the quality consistency and interchangeability of high precision components, Tianhe has introduced WFL 5-axis Linkage Turning & Milling Machining Center from Austria, Mazak's turn milling machining center from Japan and the Haas vertical machining center from USA. These processes are facilitated with precise quality inspection equipment such as the Brunker OES Metal Analyzers from Germany, Ultrasonic and Magnetic Powder Flaw Detector and high precision Hexagon Three Coordinate Measuring Machine and Farco Portable Three Coordinate Measuring Machine.
So far, Tianhe Oil Group has established strong business relationships with over 200 international oil & gas companies in supporting the top 50 oil producing countries.
1.Q:Are you a factory or trading company?
We are a factory and the Top 3 of oildrilling equipment manufacturer.
2.Q:Where is your factory located?
We locate in Heilongjiang Province, China.
3. Q:What do your factory do regarding quality control?
From material to products, we inspect each process to keep good quality.
And SGS inspection can be accepted.
4.Q:How about MOQ ?
We have stock of common sizes at hand, so even few ton is accepted.
5.Q:How about payment ?
Both T/T and L/C can be accepted.
6.Q: How long does your warranty?
We can assured the quality within 90 days after receiving the cargoes.
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