| Customization: | Available |
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| Manufacturing Process: | Forging |
| Surface Treatment: | Spray-Paint |
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Constitution
Downhole motor is composed of four assemblies of by-pass valve, motor, cardan shaft and drive shaft ( Fig. 1) .
* By-pass Valve Assembly
* Motor Assembly
* Hollow Rotor Motor
* Cardan Shaft
* Drive Shaft Assembly
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Troubleshooting |
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Problems |
Possible Causes |
Troubleshooting |
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Gauge pressure |
Motor speed loss |
Lift downhole motor for 0.3-0.6m, examine recycling pressure, slowly enhance drilling weight .If gauge pressure rises accordingly in normal condition, the problem is speed loss. |
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Motor drive shaft sticked tightly and bit nozzle plugged |
Lift bit away from the bottom.. If gauge pressure is still too high, only lift out the drill for checking or to change the bit. |
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Gauge pressure slowly increasing (not means increase of the normal pressure loss with the increase of drilling depth |
Bit nozzle plugged |
Lift bit away from the bottom, again examine the pressure. If the pressure is still over recycling pressure, try to improve recycling flow rate or to move the drill pipe up and down. If it is not solved, only lift out the drill for repair or change. |
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Bit wear out |
Go on operating for careful watch. If still no footagerate ,lift out the drill for change. |
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Formation change |
Lift the drill a little bit .If the pressure is same with recycling pressure, it may go on working. |
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Gauge pressure slowly drops |
Fluctuation of recycling pressure loss |
Examine fluid flow rate |
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Drill pipe damaged |
Lift the drill a little bit. If the gauge pressure is still lower than recycling pressure, lift it out for examination. |
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No footage rate |
Formation change |
Appropriately change drilling weight and recycling flow rate ( Note: it must be within the allowable range. |
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Motor speed loss |
Gauge pressure increases, lift the drill away from the bottom, examine recycling pressure, to increase drilling weight gradually. |
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By-pass valve in OPEN position |
Gauge pressure is too low, lift the drill a bit and start and stop the pump twice. If it is not solved, lift it out to check or change by-pass valve. |
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Cardan shaft damaged |
Often with pressure fluctuation, lift the drill a bit , less fluctuation range. Only lift it out for examining and changing. |
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Bit wear out |
Change new bit |
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Downhole Motor Configuration Option
* Unifrom Thickness:Reasonable to change the shape of stator housing, the stator elastomer layer of Unifrom Thickness downhole motor is thin and even. The characteristics of the downhole motor are short length, high power, high pressure drop, low rotate speed, high cooling efficiency, even thermal expansion, more widely used, more optimized structure and the lighter mass. Especially, the characteristics can prolong downhole motor's life and improve drilling efficiency in the ultra-deep well, directional well and high temperature well.
* Resistance High-temperature And Oil Based Mud:The downhole motor is suitable for high-temperature, high oil base mud system. In the conditions of less than 180°C and high oil, specially formulated stator elastomer owns high retention rates of strong force strength, tear strength and other properties. The oil-resistant elastomer with reasonable magnitude of interference has better using effect in the high-temperature, high oil base mud.
* Corrosion-resistance:After corrosion spraying to form special coating, the rotor is better corrosion, erosion and abrasion-resistant. And downhole motor is suitable for long time in the corrosive fluid.
* Air Drilling:Air drilling can protect reservoir well, improve rate of penetration, significantly shorten drilling period, take precaution against mud loss and borehole collapse, now is gradually widely used. Air drilling downhole motor is driven by gas, foam and other compressible fluids, provide power for the downhole and drives bit to penetrate rock. Air drilling downhole motor has higher technical requirements of the assembly structure, linear design of the motor stator and operation specification.
We may manufacture various types of Screw Drill with the ratio of numbers of stator rotor ends: 1:2,3:4,6:7 and 9:10 according to the customer's demand, and provide the products of 14Mpa bit nozzle pressure loss based on the customer's application.
All products leave the factory after passing the experimental test.
Each downhole mud motor is tested on the professional testing bench and the delivered downhole mud motor is 100% guarateed qualitified, then the test report will be provided to you.
Each downhole mud motor can continuously work 7~10 days with good working condition and correct operation.
Of course, online after-sale service is also available at any time.
FAQ
How to order?
Please send us your inquiry with detail item description or with Model number.
If there is no packing demand we take it as our regular exported standard packing.
We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.
You send us your detail requirement, we provide quotation to you.
Can I expect a quality products?
All the production and processing are strictly according to ISO 9001:2008 and API standard. At the same time, mature production technology ensuring the quality satisfy international request. We also welcome the third party inspection, such as BV, SGS and TUV.
The information you may like to know before Payment:
1. Methods of Payment:
T/T (Telegraphic Transfer) or L/C at sight
2. Shipping way
Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air
Bulk order: we suggest by air or by sea.
3. Quality Control
We have our own experienced QC.
There will be strict inspection and testing for every order before shipping out.
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