Inflatable Rubber Bladders
Inflatable Rubber Bladders
(OP)
In need of a high temperature (300 degree farenheit)inflatable bladder. Initial bladder dimensions are 2 3/4" OD, 2 1/8" ID and 15" length. Bladder needs to inflate to 5 1/2". Pressure rated for 1500 to 2000 psi. This bladder will be run inside a steel tubing in a downhole oilfield application. This is a prototype tool and other larger sizes for bladders will be needed.





RE: Inflatable Rubber Bladders
Rather than looking for bladders, I think you should be talking to manufacturers of hydraulic/pnematic accumulators, who should be able to supply a packaged unit, with the correct bladder material to withstand the operating conditions.
I hope this helps
Tom
RE: Inflatable Rubber Bladders
R J Del Vecchio
Technical Consulting Services
(consultant in Applied Rubber Technology)
RE: Inflatable Rubber Bladders
The bladder has a 2:1 expansion ratio which is not a difficult probelm for the elastomers used for these products.
Your problem is the pressure at 300F and preventing extrusion. The bladder by itself will not do that. You need a means of reinforcing the bladder to prevent the bladder from squeezing out under pressure. See Baker, TAM and Weatherford for examples. They use slats and wire weave. For 300F only a slat design will work.
There is no such thing as long-term inflatable packer. for long term the packrs are cement inflated, in which case the bladder is no longer an issue. This comes with it's own set of problems.
RE: Inflatable Rubber Bladders