API RP 19B:2006 pdf download

API RP 19B:2006 pdf download.Recommended Practices for Evaluation of Well Perforators.
1.10 DATA RECORDING AND REPORTING
Data shall be reported on all shots fired or attempted. Data shall be reported in the same order that it was shot ballistically, with * I being the first charge shot. See Figure 2 for an example data sheet, Any data sheet used must include a similarly positioned watermark indicating that the test is not registered with the API. Comments regarding other gun system configurations should not be included
1.11 SPECIAL API RP 19B SECTION I TESTS
en Viroflflleflts iiiay require ihat special tests he conducted to better simulate down hole conditions. Some conditions require special casing. In some cases even dual string casing. is placed over a producible ione. In other situations gas environments may require the use of special gun systems. Operators must be able to evaluate perforating systems under these conditions with special tests.
This section provides a means to shoot and publish a witnessed test in a Special API RP 19B Section I Target, with any or all of the following exceptions.
I. Special casing may be used.
2. Dual string casing may be used.
3. The gun may be shot with air instead of water in the gun to casing annulus.
All other API RP l9B Section I requirements must be met. All exceptions must be listed in the remarks section of the appropriate data sheet (see Figure 2 or 3).
Casing annulus material should be RP 19B cement unless otherwise specified by the customer.
Single string tests must be reported on the Special Test form provided by API. See Figure 2.
Dual string test must be reported on the Special Dual String Test form also provided by API. See Figure 3.
2 Evaluation of Perforators Under Stress Conditions, Berea Targets
2.1 INTRODUCTION
This section is intended to provide a tcst procedure to be followed for measuring perforator performance in stressed Berca sandstone with wellbore pressure applied.
2.2 BEREA SANDSTONE TARGET
Tests will be conducted using Berea sandstone targets mounted as shown in Figure 4. Berea sandstone target material shall have a bulk porosity of not less than 19% nor more than 21%
2.3 PREPARATION OF BEREA SANDSTONE FOR THE TARGET
2.3.1 Size
For charges 15 grams or less, a 4-inch (±3%) diameter coic sill he ut hum a large block of Herea sandstone. For charges exceeding IS grams. a 7-inch (±3%) diameter core will be cut from a large block of Berea sandstone. Depending on the expected perforation depth, the total length of the core shall approximate 12, 15. 1 ), 21. 24. or 27 inches, measured to within ±0.25-inch. The test will be considered valid if at least 3 inches of unpenetrated core remains.
2.3.2 Cutting
The core may be lathe turned or cut with a core barrel.
2.3.3 Drying
The cut and sited core shall be dried at least 24 hours, or to constant weight in a ventilated oven maintained at 200’F
3.2 REFERENCE DATA
A reference charge test shall be conducted at atmospheric pressure and ambient temperature employing the steel target and the test described herein.
3.3 TEST TARGET
Tests shall be conducted with a laminated target consisting of mild-steel (ASTM A36) flat plates. I inch thick with a faceplate /8 inch thick, Cross sectional area of the plates shall be chosen for repeatable data collection. Typical target configuration is shown in Figure 8. The target thickne%% must be at least 0.5 inch greater than the average penetration depth recorded.
3.4 PERFORATING SYSTEM SELECTION
The perforating system to be tested skill consist of the gun associated hardware, and firing head. Production equipment (or specially modified hardware to the same specification) shall be utilized. including gun body. adapters. transfer subs, and explosive components. The free volume to explosive load ratio must be the same or less than a fully loaded field configuration gun: or previously established in a separate test by firing a minimum of one charge after holding at time and temperatUre at an equal or lower free volume to explosive load ratio for this explosive. For tubing conveyed systems, at least one transfer must be demonstrated on the same or a separate test utilizing a production transfer sub. At least one charge shall be fired subsequent to the transkr. For wireline conveyed systems. any electrical or mechanical switches shall be included if recommended by the service company for this application, unless previously qualified in a separate lest.
3.5 CHARGE SELECTION AND AGING
The required number of charges shall be samples taken uniformly from a minimum production run of 1000 RDX or PETN charges fa production run of’ only 3(10 charges is required for high temperature explosives) and packaged in the manufacturing service company’s standard shipping containers. These charges shall be stored for a minimum of four weeks prior to testing to allow some aging to occur.
3.6 GUN CONFIGURATION
Hollow canier perforating guns must have pressure-tight enclosures on both ends and must be sealed during full duration of the test.