API TR 10TR5:2008 pdf download

API TR 10TR5:2008 pdf download.Methods for Testing of Solid and Rigid Centralizers.
An axial load shall be applied to the top of the Inner test casing to f04’Oe the cenlrakzer against or through the
restriction sleeve while recording the load applied. Suggested load rate should be 500 lbt to 1.000 lbt per second.
The test should be continued until me centralizer fails, is completely inside the restnchon, or a maximum load of
50,000 lb( has been applied
7.4 Partial Circumferential Loading Test (Rigid Centralizer Only)
The purpose of this test is to &mulate the effect of runnang rigid centralizers through a keyseat o past a ledge. The centralizer Is pushed through a partial circular restriction smaller than the 00 of the centralizer. The test assembly is configured with an internal circumferential partial bore restriction (see Figure 9). A typical test set•up is shown in Figure 10.
The restriction sleeve should be within the tolerances indicated in ISO 11960 for non•upset pipe. Burrs or similar defects should be removed prior to testing. The restriction sleeve should also be of sufficient length to allow passage of the entire length of the centralizer through the restriction. The circumferential angle of the restriction is selected by the user, Suggested angles are 90 or 45 degrees of the inner circumference of the outer casing.
An axial load shall be applied to the top of the inner test casing to force the centralizer against or through the restriction sleeve while recording the load applied. Suggested load rate should be 500 to 1,000 lbf per second. The test should be continued until the centralizer fails, is completely inside the restriction, or a maximum load of 50,000 lb( has been applied.
7.5 Reporting of Test Results
The following information should be reported:
1. size, weight, grade, and type of surface finish of the inner test casing;
2. measured length, internal diameter and OD of the outer test casing, restriction sleeve, and centralizer before testing:
3. descrçtion of restriction and type of test. total circumferential or partial circumferential loading;
4. loading rate and loading technique;
5. load at which permanent deformation or failure initially occurred:
6. maximum load needed to push the centralizer into the restriction;
7. photos and description of the condition of the centralizer following the test, noting any damage and dimensional changes of the centralizer and other test fixtures;
8. centralizer manufacturer, model number, nominal size, number, type. location of attachments to the push mandrel and installation torque on attachment device (if applicable).
The test needs to be performed with the inner pipe and the outer pipe within 5 degrees of horizontal. The forcesshould be applied at the midpoint of the centralizer blade or fin longitudinally, i.e. the centralizer should be at themidpoint between two supports of the load frame with the load applied at the center of the two supports.
8.2Test Procedure
1. Apply external force to the outer pipe so it is transferred to the inner pipe vertically through the point of
contact between the centralizer blade or fin with the outer pipe (see Figure 11, Position i1).Apply this forceuntil blade failure or to a maximum of 50,000 lbf. Measure and report the condition of the blades and
centralizer before and after the test. Report test conditions.
2. Apply an external force to the outer pipe so that it is transferred to the inner pipe vertically midway between
two centralizer blades or fins as shown in Figure 11, Position 2.Apply this force until blade failure or to amaximum of 50,000 lbf. Measure and report the condition of the blades and centralizer before and after thetest.Report test conditions.
3. Each blade or fin should have this force applied directly over and between each set of blades or fins as previously described in Steps 1 and 2.