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AssigneeBJ Services Company
InventorsRobert Lee Dillenbeck, Bradley T. Carlson
Estimating the term…
An apparatus for use in circulating cement in a casing in a wellbore is described having a first component such as a sensor disposed on the casing and a second component such as a detectable device disposed at a fluid interface formed between the cement and a fluid. The sensor may be a sensor coil mounted on the perimeter of the lower end of the casing, while the detectable device may be a transponder capable of emitting Radio Frequency Identification signals to the sensor to signal its arrival at the lower end of the casing. The transponder may be encased in a protective covering. Also described is a method of cementing a casing utilizing a first component such as a sensor disposed on the casing and a second component such as a detectable device disposed in the cement.
A circulating cementing apparatus for cementing a casing in a wellbore, the apparatus comprising:
A reverse circulating cementing apparatus for cementing a casing in a wellbore, the casing and the wellbore defining an annulus therebetween, the apparatus comprising:
A fluid interface detecting system for cementing a casing in a wellbore, the system comprising:
A method of reverse circulating cementing a casing having a lower end in a wellbore, comprising:
A method of conventional circulating cementing a casing having a lower end in a wellbore, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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Methods or devices for cementing, for plugging holes, crevices or the like: plastering the borehole wall; Injecting into the formation
Casing heads; Suspending casings or tubings in well heads: cementing-heads, e.g. having provision for introducing cementing plugs
Survey of boreholes or wells: locating or determining the position of objects in boreholes or wells , e.g. the position of an extending arm;…
Earth or rock drilling
Term end not estimated
1. Field of the Invention
The invention relates to an apparatus and method for use in the field of oil and gas recovery. More particularly, this invention relates to an apparatus having a first component such as a sensor and a second component such as a detectable device or material adapted to determine when a general interface region between two dissimilar fluids has passed a given point in a well.
2. Description of the Related Art
FIGS. 1A and 1B show one embodiment of the present invention used in conjunction with the conventional circulating cementing operation.
FIGS. 2A and 2B show one embodiment of the present invention used in conjunction with the reversed circulating cementing operation.
FIG. 3 shows an embodiment of the present invention that utilizes an sensor coil and a transponder.
While the invention is susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and will be described in detail herein. However, it should be understood that the invention is not intended to be limited to the particular forms disclosed. Rather, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Illustrative embodiments of the invention are described below as they might be employed in the oil and gas recovery operation. In the interest of clarity, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure. Further aspects and advantages of the various embodiments of the invention will become apparent from consideration of the following description and drawings.
Embodiments of the invention will now be described with reference to the accompanying figures. Referring to FIGS. 1A and 1B, one embodiment of the present invention is shown being utilized with the conventional circulating cementing process described above. The cement slurry 12 is shown being pumped from the surface 18 into the casing 20. As shown in FIG. 1A, the cement slurry 12 pushes the drilling mud 36 down the casing toward the reservoir 14 and up an annulus 10 formed between the outer diameter of the casing 20 and the wellbore 30. As shown in FIG. 1A, the cement slurry 12 is approaching lower end 26 of casing 20. In FIG. 1A, valve 34 is shown in its open position thus allowing fluid to pass through the casing 20.