Frac Joints

The Carbide Blast Joint gives effective protection to tubing inside the "frac head" or Christmas Tree during massive fracturing operations. For example, a Permian Basin operator used three feet of 2-7/8-inch Slimline made up on 6.5# N-80 tubing just below the Christmas tree tubing hanger. An estimated 540 bbls. of frac fluid containing 27,600 lbs. of sintered bauxite was pumped at 6,100 psi. Treating rate was 9.2 bpm of fluid down the annulus. After the fracturing treatment was completed, the operator reported no indication of communication in the Christmas tree. Sizes are available for standard frac head or Christmas tree applications. The frac joint is re-usable in any well with the same tubing diameter.

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CASE HISTORIES #1:

Fracture Treatment of Well A.T. Mast A, #1
Table 15 (Click table for enlarged view)

Impact Area
These photos' reveal the erosive effects of Interprop, used as a propant. While the tubing hanger and subsequent threads of the tubing have sustained damage, the Carbide Blast Joint remains virtually unscathed.

Note: A combination of turbulence and sand eroded the tubing hanger and tubing threads. CBJ has eliminated this problem, with a special beveled Carbide Transition Ring Set which deflects the turbulence.

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*Please note: The pictures shown are used to illustrate the erosive effect of frac propant on the production tubing-ONLY.  In this instance, the tubing hanger was damaged due to propant deflection when hitting the carbide.  CBJ, Inc. developed a combination of beveled and larger o.d. carbide rings to deflect the propant AWAY from the tubing hanger.

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CASE HISTORY #2:

SEE SPE PAPER # 28941
Copyright 1994, Society of Petroleum Engineers, Inc.

FIELD APPLICATION OF STATIC TUBING PRESSURE DATA AND ON- SITE FRACTURE MODELING

 

 

 

    

 


 

 

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