Wayne,
Since it’s stripped. I have in the past put the wood in the oven at 165* to 175* for several hours to bring the oil out. Then soak it in acetone or what ever solvent you prefer. Place it in the acetone while the wood is still warm. I’ve done this on original rifles several times and it works well.
You will never get all the oil out of the wood but, with the method above, it will keep the remaining oil below the surface so it can be refinished…
Hope this helps,
Tom Klinger

Acetone, but you'll have to weight the wood to keep it under the surface. Don't be shocked if it comes out looking bleached. The first dab of finish will bring the color right back.

I've used Fuller's Earth too, packed on and placed in a black garbage bag and either set on the dashboard of the car on a hot summer day or on the steam radiator on a cold winter day - you get the drift.

Thanks guys.  Several good suggestions.

Wayne

Powdered chalk is calcium carbonate.
The cheapest I've found is a 5lb plastic jug of it for $9 and change (IIFC it was $9.14) on Amazon. Free shipping too.

It's white and sold as athletic line marker and for a number of other uses.
Irwin Strait Line (correct spelling) is the brand.

That's pretty cheap.

It works perfectly for pulling oil from wood. But the process is a slow one and you need patience.
I mix the slurry up with plain alcohol. Cheaper than acetone and the acetone doesn't make any difference in the rate the oil is pulled from the wood.
The acetone or alcohol, or lac thinner is used as they have quick evaporation rates.
You can pile on a coating of the slurry and the fast evaporation of the liquid dries it quickly and then you can add more to the surface to build it up.
The acetone evaporates so quickly that it doesn't really affect the rate that the oil is going to be absorbed. Same with the other liquids.  It's the long term that the coating sets on the wood and absorbs the oil that weeps to the surface underneath it.

It can take weeks and longer to work it all out. Coating after coating is brushed off when it turns yellow/brown from the oil it has absorbed. 
Then add another coating and let it sit again.
When you think you have it all (oil) let the brushed off wood just sit for  a week or so. If small pin point black dots appear,,it's more oil down in there.
Back to the coatings of chalk slurry and more patience.

A couple coatings and a few days time will not do it.
Patience. Have other things to do and let the stuff work.

Whiting powder and chalk powder are both calcium carbonate, but chalk powder is much cheaper. I mix up a slurry using acetone as acetone works to draw the oils out quicker. Make sure the slurry is runny as it thickens quickly as acetone evaporates fast. Once it dries I brush it off with a stiff bristle brush and put more on. If it begins to dry in the pan just add some more acetone to wet it again.