The continuously popularized technology for the development and exploitation of deep wells and horizontal wells and the large scale development of gas have raised the higher requirements for tightness of tubing and casing; to minimize the potential safety risk of incidents caused by thread leak, special-thread casing and tubing are mandatorily required for leak detection in most oilfields in Asia, North America, Mexico and South America.
This tubings and casings thread leakage detection equipment uses the high pressure increase the mixture of helium & nitrogen to the testing pressure. The dual seal detection packer is delivered to thread connection of strings when strings are putting down into the hole, then it is setting to seal. Lately, the high pressure helium is injected into the packer tool and high sensitivity detector works outside of tubing thread and take the advantage of the small size of the helium molecule & easier to escape, to test the air tightness of connections of the tubings & casings.
II. Helium leakage detection characteristic
1) Safety：detection gas helium is a kind of inert gas, lighter than air and not corrosive and damages to tested objects and operators.
2) Reliability：easy to penetrate from gas seal thread and to detect due to mini helium molecular
3) Sensitivity：reach to the rates of 1×10-7Bar·ml/sec helium
4) Convenience and efficiency：detection operation is rapid and 2 minutes for a piece of tubing on average, so no influence to well completion.
5) Wide Application：2-3/8″, 2-7/8″, 3-1/2″,4-1/2″、 5″、5-1/2”、7″ ；FOX、BGT、VAM thread casing and tubing；Christmas tree stand, pipeline, etc.
6) Long service periodOur WY-QY70 seal packer has new patent designs in steel cylinder and rubber, seal quickly and reliably, and can be used continuously under 70Mpa(10000psi) for more than 300 times.
III. Main Specification
> Ambient temperature:－15℃~70℃；
> Onshore O & G field, offshore platform O & G field; wet, salty mist, oil mist,
2) Technical parameter
> Test medium: Helium gas (40L & 50Mpa cylinder)
> Test pressure class: 1st boost 25Mpa, 2nd boost 70Mpa,
> Drive mode: Air or hydraulic oil
> Structure: skid-mounted
> Protection class: IP54
> Explosive proof class: ExdIIBT4
> Approval: BV, DNV or CCS by customer’s requirement.