(34767) 6-02-50
sb@petrotool.ru

 

+7-927-237-3517
+7-937-859-6313

Engineering support of drilling fluids

Drilling fluids play an enormous role in the construction of oil and gas wells, starting with the cleaning of the wellbore from cuttings and warnings from geological complications and emergencies, ending with a qualitative opening of the productive formation and further high rate of production well flow.

Non-destructive Testing

Non-destructive testing is used in the manufacturing, installation, repair, reconstruction and technical diagnosis.

Metalworking

One of the main activities of our company is the manufacture of parts and assembly units of any industry.

Fluid Retention Coring


Fluid Retention Coring

Fluid retention coring or as it is more commonly known - sponge coring - is a specialized technique of coring which utilizes an oil wet sponge lined aluminum inner core barrel.

During the trip out of the hole the pressure differential forces some of the oil out of the core sample. The sponge liner then absorbs this bleed off which can be extracted at the lab for further analysis. Gas and water are allowed through the sponge and escape into the drill mud contained in the annulus of the outer core barrel through vent holes drilled into the aluminum inner barrel.

While the sponge coring technique was used in wells where oil water saturation was critical, the technology is limited to lengths of 9 Meters (30 Feet) in a single run and is being replaced by enhanced accuracy in the algorithms of the labs. Utilizing the fluid retention system further limits the maximum core diameter to 3.5".

Larger diameter conventional or containerized cores can be cut so it is possible to spot a sponge core section and resume coring without having to open the well bore.

Skype