| After-sales Service: | Support |
|---|---|
| Warranty: | Support |
| Manufacturing Process: | CNC Milling |
| Surface Treatment: | Spray-Paint |
| Operation Pressure: | Atmospheric Pressure |
| Material: | Alloy |
| Customization: |
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Tianhe YJ type one-way shock absorber (bumper) is a kind of drilling tool. It can effect shock absorbing and shock reduction by means of elastic deforming and anticoagulation produced from hydraulic oil under the outside force. Its advantages such as simple structure, reliable working performance and easy to maintain can well absorb shocking and vibrating load from drill strings during drilling operation. Therefore, using of shock absorber can raise in structure the service life of drill bit and drill pipe, speed up drilling, get rid of drilling jumping, well protect surface equipment and drilling tools.
Working Principle
The hydraulic shock absorber is connected between drill bit and drill collar, the torque is transferred from top drill string to mandrel. The spline transfers torque to spline outer barrel, oil cylinder and lower sub, then drive drill bit to rotate.
The bit weight is from which of top drill tool so that drill bit insert drill into formation to break rock into pieces. The drilling mud is fed through bore of drill pipe and drill collar into mandrel of shock absorber, tailpipe, lower sub bore and ejected into bottom well.Because of the uneven bottom well conditions and special structure of cone bit, the drill bit and drill string during drilling operation would produce severe vibration. The hydraulic shock absorber, by means of compressible deformation of compressed liquid under the function of pressure, absorbs the energy from drill bit and drill string vibration. Thus, the shock absorber can reduce the vibration and impact load of drill tools.
Service Conditions
1.1 The shock absorber should place lateral load and bend stress minimum position.
1.2 During fully drilling, shock absorber can be connected between bit stabilizer and drill collar.
1.3 When bit stabilizer is used, the shock absorber can be connected directly with core barrel.
1.4 When shock absorber is required for coring operation, the shock absorber can be connected with core barrel.
1.5 During directional drilling, shock absorber can be connected on top of first stabilizer.
1.6 All kinds of shock absorber should not be used for drag bit.
1.7 Error downhole assemble will greatly reduce the usage life of the shock absorber.
1.8 During drilling, bit weight and rotating speed shall be selected according to detailed downhole condition to effect the well coordination of drilling parameters so that shock absorber shall not work in resonance area.
1.9 Shock absorber can get more obvious result when used in medium-hard formation, hard formation, gravel formation and soft-hard layers; but different formation will affect the usage life
| Parameters/Type | YSJ79B | YSJ95B | YSJ108B | YSJ114B | YSJ121C | YSJ159C | YSJ178B | YSJ203C | YSJ229B |
| Product Code | 0101000 | 0103000 | 0105000 | 0106000 | 0108100 | 0110100 | 0113000 | 0115100 | 0116000 |
| O.D. (mm) | 80 | 95 | 108 | 114 | 121 | 159 | 178 | 203 | 229 |
| I.D. (mm) | 25.4 | 28 | 32 | 38 | 50.8 | 57 | 57 | 76 | 76 |
| Work Stroke (mm) | 256 | 245 | 254 | 289 | 330 | 380 | 380 | 380 | 380 |
| Max.Work Torque (kN.m) | 3 | 4 | 4.5 | 4.9 | 7.8 | 15 | 19.6 | 22 | 25 |
| Max.Jarring Lifting Tons (kN) | 130 | 160 | 180 | 200 | 270 | 600 | 650 | 750 | 900 |
| Sealing Pressure (MPa) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Max.Work Temperature (ºC ) | 150 | 150 | 150 | 150 | 150 | 150 | 150 | 150 | 150 |
| Connection | 2 3/8REG | NC26 | NC31 | NC31 | NC38 | NC50 | NC50 | 6 5/8 REG | 7 5/8 REG |
| Pull-Down Length (mm) | 2435 | 2450 | 2450 | 2660 | 3230 | 3376 | 3340 | 3720 | 3500 |
All the packing will be suitable for export packing. All precautions will be taken to protect the cases from damage during overseas transportation,so as to receive them under proper conditions at the final destination.
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.
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.
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