Method and apparatus for acquiring and processing subsurface sam

Wells – Processes – Sampling well fluid

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

E21B 4900

Patent

active

053777557

ABSTRACT:
A method and apparatus for downhole formation testing is provided for acquisition of a phase intact sample of connate fluid by direct or indirect pumping for filling of pressure containing sample tanks that are removable from a formation testing and sampling instrument for phase intact transportation to a laboratory facility. One or more fluid sample tanks contained within the instrument are filled with connate fluid samples in such manner that during filling of the sample tanks the pressure of the connate fluid is maintained within the predetermined range above the bubble point of the fluid sample. The sample tank incorporates an internal free-floating piston which separates the sample tank into sample containing and pressure evacuation chambers. During indirect pumping a positive displacement piston pump draws fluid from the pressure evacuation chamber and permits formation pressure to shift the separator piston as the first variable volume chamber is filled with a connate fluid sample. The sample tank is provided with a cut-off valve enabling the pressure of the fluid sample to be maintained after the formation testing instrument has been retrieved from the well bore for transportation to a laboratory facility. To compensate for pressure decrease upon cooling of the sample tank and its contents, the piston pump mechanism of the instrument has the capability during direct pumping for increasing the pressure of the sample sufficiently above the bubble point of the sample that any pressure reduction that occurs upon cooling will not decrease the pressure of the fluid sample below its bubble point.

REFERENCES:
patent: 4940088 (1990-07-01), Goldschild
patent: 5289875 (1994-03-01), Stokley et al.
patent: 5303775 (1994-04-01), Michaels et al.
patent: 5337822 (1994-08-01), Massie et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for acquiring and processing subsurface sam does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for acquiring and processing subsurface sam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for acquiring and processing subsurface sam will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2204865

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.