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  Method and system for evaluating task completion times to dataRelated Patent Categories: Wells, Processes, With Indicating, Testing, Measuring Or LocatingThe Patent Description & Claims data below is from USPTO Patent Application 20070056727. Brief Patent Description - Full Patent Description - Patent Application Claims
STATEMENT OF RELATED PATENT APPLICATION [0001] This non-provisional patent application claims priority under 35 U.S.C. .sctn. 119 to U.S. Provisional Patent Application No. 60/716,612, titled Interpretive Techniques Using Sensor Data, filed Sep. 13, 2005. This provisional application is hereby fully incorporated herein by reference. FIELD OF THE INVENTION [0002] The technical field of the present invention relates generally to evaluation of data concerning servicing hydrocarbon wells and more specifically to an evaluation of data obtained from a computerized work over rig adapted to record and transmit data concerning well servicing activities and conditions at a well site. BACKGROUND OF THE INVENTION [0003] After a well has been drilled, it must be completed before it can produce gas or oil. Once completed, a variety of events may occur to the formation, the well and its equipment that requires a "work-over." For purposes of this application, "work-over" and "service" operations are used in their very broadest sense to refer to any and all activities performed on or for a well to repair or rehabilitate the well, and also includes activities to shut in or cap the well. Generally, work over operations include such things as replacing worn or damaged parts (e.g., a pump, sucker rods, tubing, and packer glands), applying secondary or tertiary recovery techniques, such as chemical or hot oil treatments, cementing the well bore, and logging the well bore to name just a few. Service operations are usually performed by or involve a mobile work-over or well service rig that is adapted to, among other things, pull the well tubing or rods and also to run the tubing or rods back in. Typically, these mobile service rigs are motor vehicle-based and have an extendible, jack-up derrick complete with draw works and block. In addition to the service or service rig, additional service companies and equipment may be involved to provide specialize operations. Examples of such specialized services includes: a chemical tanker, a cementing truck or trailer, a well logging truck, perforating truck, and a hot-oiler truck or trailer. [0004] It is conventional for a well owner to contract with a service company to provide all or a portion of the necessary work-over operations. For example, a well owner, or customer, may contract with a service rig provider to pull the tubing from a specific well, contract with one or more service providers to provide other specific services in conjunction with the service rig company so that the well can be rehabilitated according to the owner's direction. [0005] It is typical for the well owner to receive individual invoices for services rendered from each company that was involved in the work over. For example, if the portable service rig spent thirty hours at the well site, the customer well owner will be billed for thirty rig hours at the prevailing hourly rate. The customer is rarely provided any detail on this bill as to when the various other individual operations were started or completed, or how much material was used. Occasionally, the customer might be supplied with handwritten notes from the rig operator, but such is the exception, not the rule. Similarly, the customer will receive invoices from the other service companies that were involved with working over the well. The customer is often left with little to no indication of whether the service operation for which it is billed were done properly, and in some cases, even done at all. Further, most well owners own more than one well in a given field and the invoices from the various companies may confuse the well name with the services rendered. Also, if an accident or some other notable incident occurs at the well site during a service operation, it may be difficult to determine the root cause or who was involved because there is rarely any documentation of what actually went on at the well site. Of course, a well owner can have one of his agents at the well site to monitor the work-over operations and report back to the owner, but such "hands-on" reporting is often times prohibitively expensive. [0006] The present invention is directed to ameliorating these and other problems associated with oil well work-over operations. SUMMARY OF THE INVENTION [0007] The present invention is directed to incrementing a well service rig in such a manner that activity-based and/or time-based data for the well site is recorded and evaluated. The invention contemplates that the acquired data can be transmitted in near real-time or periodically via wired, wireless, satellite or physical transfer such as by memory module to a data center preferably controlled by the service rig owner, but alternately controlled by the well owner or another. [0008] For one aspect of the present invention, a method of determining the accuracy of an activity listing for activities completed by a well service rig at a well site can include determining a first activity from an activity listing, such as a Gantt chart. Charts of sensor data can be evaluated. The charts can be of sensor data obtained from sensors on the well service rig and the data can be associated with work completed at the well site by the service rig, other service vehicles or by third party operators. An evaluation of the charts of sensor data can be conducted to determine if the activity listed in the Gantt chart corresponds with the data that is being received from the sensors and displayed on the data charts. [0009] For another aspect of the present invention, a method of determining the completion times for an activity completed by a well service rig at a well site can be determined by evaluating one or more charts of sensor data associated with work completed at the well site. An activity can be determined through the evaluation of the charts of sensor data and the time to complete that activity can be determined. Once determined, the completion time can be recorded in a computer program. [0010] For yet another aspect of the present invention, method of determining service rig downtime can be achieved by evaluating one or more charts of sensor data associated with work completed at the well site. Each chart of sensor data can be evaluated to determine if a portion of the data on that particular chart includes a substantially flat or missing string of data for a predetermined length of time, for example, fifteen minutes. The time period of the substantially flat or missing data can be determined and other charts of sensor data can be evaluated to determined if they have substantially flat or missing data for the same time period. BRIEF DESCRIPTION OF DRAWINGS [0011] For a more complete understanding of the exemplary embodiments of the present invention and the advantages thereof, reference is now made to the following description in conjunction with the accompanying drawings in which: [0012] FIGS. 1A and 1B are flowcharts of an exemplary process for of a well servicing activity cycle according to one exemplary embodiment of the present invention; [0013] FIG. 2 illustrates one embodiment an activity capture methodology outlined in tabular form according to one exemplary embodiment of the present invention; [0014] FIG. 3 provides a frontal view of an exemplary operator interface according to one exemplary embodiment of the present invention; [0015] FIG. 4 provides an illustration of an exemplary activity capture map according to one exemplary embodiment of the present invention; [0016] FIG. 5 is a side view of a mobile service rig with its derrick extended according to one exemplary embodiment of the present invention; [0017] FIG. 6 is a side view of the mobile service rig illustrating the raising and lowering of an inner tubing string according to one exemplary embodiment of the present invention; [0018] FIGS. 7, 7A, and 8 are exemplary displays that include activity Gantt charts according to one exemplary embodiment of the present invention; [0019] FIG. 9 is a flowchart of an exemplary process for evaluating and determining the accuracy of an activity Gantt chart according to one exemplary embodiment of the present invention; Continue reading... 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