Oil Well Yj One-Way Shock Absorber Bumper Vibration Reducing in Drilling Operation Downhole Accident Remedy

• Customization: Available
• After-sales Service: 3 Years
• Warranty: 24moths
• Model NO.: YJ4C-94C
• Manufacturing Process: Forging
• Surface Treatment: Spray-Paint
• Operation Pressure: Atmospheric Pressure
• Material: Cast Steel
• Transport Package: Wood Case or Stantdard Sea Packing
• Specification: O. D. 38-70MM
• Trademark: Tianhe
• Origin: China
• HS Code: 8431431000
• Production Capacity: 5000000PCS

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

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

Detailed Photos

Certifications

Packaging & Shipping

 

Company Profile

Our Advantages

Tianhe principle is to offer high quality products at competitive price to benefit our customers and the industry in the long run.
We are the Leading manufacturer in China since 1973 for drilling /fishing /milling equipment for oil and gas.
We have established a complete quality control system, all products& equipments manufactured as per international standard and API standard.
Competitive Advantages
1. We offer high quality products at competitive price.
2. Shortest delivery time & Flexible payment terms.
3. Full range of drilling /fishing /milling equipment for oil and gas.
4. Timely after-sale service.
5. Imported International brands Machines such as Japan Mazak machining center, Austria WFL machining center etc
6. Complete quality control system, offices and testing equipment.
 

 

FAQ

Dear  customer,

Thanks for your time of visiting us on made in china, if you have any further questions and needs, please kindly inform us by inquiry online or contact us by below information.

We look forward to your kind reply, thanks very much.

Ms. Dongyan
Sales Manager

Tianhe Oil Group Huifeng Petroleum Equipment Co., Ltd.