Oil Well Bore Yj One-Way Shock Absorber/Bumper

• After-sales Service: Support
• Warranty: Support
• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Material: Cast Steel
• Model NO.: YJ4C-94C
• Transport Package: Wood Case
• Specification: O. D. 38-70MM
• Trademark: TIANHE
• Origin: China
• HS Code: 8431431000
• Production Capacity: 20000piece/Year

Product Description

Product Description

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.
 

Specifications - YJ  One-Way Shock Absorber
YJ One-way Shock Absorber (14)

 

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

Certifications

Company Profile

Tianhe Oil Group Huifeng Petroleum Equipment Co., Ltd is a modernized medium-scale enterprise specialized in production of oil and gas tools.

As an API-Certified established manufacturer and supplier of a comprehensive range of downhole equipment with related accessories, we are committed to providing the highest Quality products for the Petroleum and natural gas industry since 1973.


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.

We take pride in delivering superior performances and reliability. Our objective is to exceed your expectations, improve your economics and be an integral part of your strategies.