Logging tools are run on a wire line in 2. The intermediate casing serves as strong posts between the surface casing and the production casing. For example, drilling fluid left in the annulus between the casing and the drilled hole deteriorates with time. The scab Tie-back liner is usually cemented in place. Our in-house team of PowerPoint presentation designers, copywriters, and web experience engineers can help take the selling power of your presentations to new heights. The shoe depth selected for the conductor casing should be strong enough to withstand fracturing during drilling the next hole interval which is assumed to have no hydrocarbon bearing intervals. One an the surface quipment, because the surface equipment must be able to withstand any potential ce burst pressure is generally set to the working pressure rating quipment used.
A typical Christmas tree is shown in fig 20. It is, therefore important check for the collapse resistance of this grade under axial tension. Thus, the conductor pipe must be checked for compression load as well. Other tension loadings can arise due to bending, drag, shock loading and pressure testing of casing. When depths agree, accept answer typically 2-4 iterations agreement to within 30 ft will be satisfactory Linear Interpolation Linear Interpolation Linear Interpolation With design factor:. By choosing the string with the lowest possible weight per foot of steel and the lowest coupling grades that meet the design load conditions, minimal cost is achieved. The burst resistances of the suitable grades from uirements and the intervals for which.
This allows tools to be run as part of the completion that would be too large to fit inside the liner but could be set higher up, inside the casing. The presentation had become not just a PowerPoint, but almost like a short animation, which allowed our sales team to 'tell a story' - sales increased by over 18% in the 3 months proceeding the new deck. In addition safe handling, running and hanging practices are covered. N equivalent mud specific weight. The seal may be of resilient type, plastic packed type or welded type.
Depth Pressure Casing Design - Solution Collapse Requirements For collapse design, we start at the bottom of the string and work our way up. The bit guide, or bit guide and secondary seal assembly must be sized to fit the production casing string. At greater depths, complete evacuation of the casing due to lost circulation is never achieved. The effect of biaxial load on collapse and design requirement for buckling are ignored. Computer programs make detailed casing designs routinely possible, including tri-axial analysis. The upper surface shortens and is in compression. Suitable for H2S service at temperature over 150 0 F.
Fluid flow in such is turbulent and tends to enlarge the hole sections which are nsitive to erosion. Because a liner is set at the bottom and hung from the intermediate casing, the major design criterion for a liner is the ability to withstand the maximum collapse pressure. This course provides a comprehensive overview of the design process, emphasizing the working stress approach currently used in the industry. Participants will also learn to calculate tension, compression, burst collapse, yield and threshold strength. To control pressures during drilling 6.
An annular clearance of 0. It is used to isolate troublesome zones and to permit drilling below these zones without having well problems. If a kick occurs and the shut—in casing pressure plus the drilling fluid hydrostatic pressure exceeds the fracture resistance pressure of the formation at the casing shoe, fracturing or an underground blowout can occur. While I was very happy with the end result of the first project, the real litmus test was with the sales team, who loved it. The Scab Tie-back Liner is a section of casing extending from the top of an existing liner but does not reach the surface.
Casing Design At some depth the 43. If instead the mud is on the top, the load line is represented y the solid line. These expected to be elastic. For a given field , a ng density logs from several wells drilled in the area. Inasmuch as the safety ctor is double the required margin, it is not necessary to check for pressure testing. The pressure gradient equivalent to the specific weight of the fluid outside the pipe is that of the drilling fluid in the well when the pipe was run. The imal depth most suitable.
A new approach to tubular string design. Good cementation of this casing must be ensured to prevent communication behind the casing between the lower hydrocarbon zones and upper water formations. It overlaps the existing casing by 200 to 400 ft. Drilling fluids can contaminate fresh water aquifers and to prevent this from occurring the casing seat must be below the aquifer. Our design criteria will be based on hydrostatic pressure resulting from the 12. Casing is filled with influx gas.
The top flange must be sized to receive the required tubing hanger, and of the correct working pressure, to fit the adapter flange on the Christmas tree assembly. In liner completion both the liner and the intermediate casing act as the production string. In-House Course Presentations All courses are available for in-house presentation to individual organizations. Tubing hanger It is used to provide a seal between tubing and to seal between the tubing and the tubing head. In summary, the following assumptions are made in the design of collapse load for surface casing see Fig. These were the most promising: This is the range of the work I presented to the client.