| 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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The Tianhe DJ Surface Bumper Jar/Sub is engineered to withstand sustained bumping action in fishing, light milling, and workover operations. The tool is designed to permit a 10" to 18" vertical stroke, either upward or downward. This stroke is always available to the operator, whether rotating or not. Strokes greater than 18" can be furnished on special request.
The Tianhe DJ Surface Bumper Jar/Sub will transmit full torque at all times during rotation and bumping operations. Adequate striking surfaces are provided at the limits of the free movement to produce the great impact so necessary to get high quality, positive bumping action in either direction. Specially designed rugged splines provide a source of continuous torque transmission. These splines are always in engagement, whether bumping or not.
The bores permit full circulation at all times. The balance feature which is composed of the Floater in a suitable Floater Body surrounding the Washpipe, serves a double purpose. It balances the external pressure with the circulating fluid pressure; and it serves to allow for volumetric expansion of the tool working fluid, due to temperature. This results in freer operation under extreme conditions of pressure differential or of temperature, or both. It also results in longer tool life.
Under such adverse conditions the Tianhe DJ Surface Bumper Jar/Sub will perform where other tools fail. The Tianhe DJ Surface Bumper Jar/Sub is especially well-suited for use in deep, severe fishing operations, or for light milling or coring operations. It permits an immediate bumping action to prevent cuttings and cavings from settling and wedging the drilling or fishing string.
The Tianhe DJ Surface Bumper Jar/Sub will free drill pipe and reamers, drill collars, bits and other tools which have become stuck, lodged or keyseated. The tool can readily be used to bump repeatedly in either direction or to bump alternately up and down.
The DJ surface bumper jar has been proven to be a safe and effective tool in releasing stuck tools in drilling operations throughout the years. It is generally connected at the surface section of the drill string during operations which require strong downward jarring impacts. The jarring force can be easily adjusted with the adjustable device located above the rotary disc. The surface bumper jar is easy to operate and is uniquely designed to support continuous down jarring.
Generally when the surface jar makes a jarring operation, the strong down jarring impact on the stuck tool can be clearly seen. Thus, the surface jar is built to withstand heavy load and strong torque. In addition, it possesses good sealing performance that can withstand mud circulation with high pump pressure.
| Parameter/Model | DJ46B (4 3/4") | DJ70B (7") | DJ70C (7") | DJ80B (8″) |
| Product Code | 0208000 | 0213000 | 0213100 | 0215000 |
| O.D. (mm)(in) | 121 (4 3/4″) | 178 (7″) | 178 (7″) | 203 (8″) |
| Max.Jarring Force MN (tf) | 0.4 (41±5) | 0.68 (70±5) | 0.68 (70±5) | 0.68 (70±5) |
| Max.Tension Load MN (tf) | 1.2 (122.00) | 1.5 (153.00) | 1.5 (153.00) | 2.1 (214.30) |
| Sealing Pressure MPa (kgf/cm2) | 30 (294) | 30 (294) | 30 (294) | 30 (294) |
| Stroke(mm)(in) | 1500 (≈59″) | 1220 (≈48″) | 1800(≈70.87″) | 2000(≈78.75″) |
| I.D. (mm)(in) | 30 (1 3/16″) | 47 (1 7/8″) | 47 (1 7/8″) | 50 (Z″) |
| Connection | NC38 | NC50 | NC50 | NC50 |
| Closed Length (mm)(in) | 3095 (121.85″) | 3090 (121.8″) | 3670 (144.5″) | 3890 (153.15″) |
| Orginal Releasing Force (tf) | 15 | 20 | 20 | 20 |
| Weight (kg) | 170 | 450 | 500 | 730 |
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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