| Customization: | Available |
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| After-sales Service: | Techinical Support |
| Warranty: | 1 Year |
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Tubing Drain is designed to provide a means of equalizing pressures between the tubing and annulus by simply over pressurizing the tubing string to a pre-set point. When the pre-set point is reached, a set of shear pins will break and the external sleeve will move down to uncover the ports in the inside nipple.
There are different types of tubing drains:
1.Rotating- commonly used in conjunction with a rotating anchor and must have a backup to actuate them in the hole.
2.Drop Bar- a bar is dropped down the tubing string from the surface to shear a plug type device
3.Shear Pin- provide the resistance to applied pressure or mechanical manipulations.
4.Pressure Relief- pressure is applied to a predetermined amount to open the device.
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Cup packer is mainly composed of upper joint, cup and center tube. It is a kind of selfsealing packer. The pipe annulus is sealed by interference cup and casing inwall. On the impact of downhole pressure difference, cup expanses to seal the annulus and it just can bear one-way big pressure differential. Cone cup is the main part of cup packer. It is vulcanized rubber on the metal frame. Cup packer is used in well together with other downhole tools. When the tool down to the designed position, it's sealed by compression between cup and inwall and pressure difference. Pull the column to realize unsealing.
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1.Are you a factory?
Yes,we have our own factory for manufacturing and we have the long history in this field as the China top brand.
2.Can you provide free sample?
Yes, we can provide samples in our stock for free, customer just need to bear the shipping fee.
3. Hhow about the quality guarantee ?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
4.what can you buy from us?
OCTG / Pumping Unit / Sucker Rod Pump / Wellhead and Christmas Tree / Casing and Coupling /Pup joint/Crossover/Centralizer
5. What is your advantages beyong other suppliers?
1).Complete categories & Reasonable price
2).Fast delivery & Quality guarantee
3).Supplier of china famous oil field and lots of US oil field etc.
4).20+ years professional manufacture major on oil equipment
6. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,Express Delivery;
Accepted Payment Currency:USD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Cash,Escrow;
Language Spoken:English,Chinese,Spanish
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