E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/17
E21B 7/12 (2006.01)
Patent
CA 1117002
DL-1 AN APPARATUS AND METHOD FOR RE-ENTERING AND CEMENTING AN UNDERWATER WELL Abstract A re-entry cementing float shoe for use with sonar/TV underwater guide systems is a short inner and outer cylindrical housing members in concentric spaced relationship forming an annular space therebetween with a cementing core filling said annular space, said inner housing has its top below the top of the outer housing, the upper inner surface of the cement forming a taperal lining cone, the bottom of the cone ending at the top of the inner housing and the top of the cement cone ending at the inner surface of the outer housing below an inner top portion of the outer housing, said portion having an attachment means for accepting and attaching to a casing pipe. The inner surface of the inner housing has an inner diameter capable of receiving and holding a cementing pipe string, followed by a first circular shoulder means sloping inwardly and downardly, a plurality of threads capable of receiving and holding a latch plug are on the inner surface of the inner housing below the first shoulder means, below the threads are a locating means and an anti- rotation and/or orientation means for a sonar/TV locating camera, below said locating means and said anti-rotation means is a second circular shoulder means sloping outwardly and downwardly adapted to sealingly receive a ball valve. Below said second shoulder is a side pocket valve housing with a ball valve, the vale housing extends downwardly and outwardly from the bore of the inner housing to a depth at least equal to the diameter of the ball valve, the diameter of the ball valve being such that it will when in contact with the second shoulder means form a seal. The ball valve has a density which is greater than water and less than the cement to be used. The side pocket housing is equipped with a conduit means forming a drain means extending from the bottom of the pocket communicating at all times with the space outside of the shoe. A method of entering an underwater well bore or hole and cementing within said hole which involves lowering the shoe described above at- tached to a casing to within the vicinity of the well b?re, stabbing a cementing pipe string into the top of the shoe, lowering a sonar/TV guiding device through the cementing string and finding and entering the well by use of the guiding device, withdrawing the guiding device, lowering the casing with shoe to the desired level within the well or bore hole, pumping a desired amount of cement into the cementing string, pumping in a wiping latch-down plug so that it is held by the threads in the inner housing and forms a seal with inside of the inner housing of the shoe and the ball valve forms a second seal with the second shoulder means.
327657
Borden Ladner Gervais Llp
Cole Frank
LandOfFree
Apparatus and method for re-entering and cementing an... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for re-entering and cementing an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for re-entering and cementing an... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-285798