API RP 14H:2007 pdf download

API RP 14H:2007 pdf download.Recommended Practice for Installation, Maintenance and
Repair of Surface Safety Valves and Underwater Safety Valves Offshore.
a. Option 1: Perform test as in 6.1.2.
b. Option 2:
I. Shut-in wcll and USV as for operation test (see 6.1 .2a and 6.1 .2b) and close downstream header or tiowlinc valvc.
2. With pressure on upstream side of the USV. measure pressure buildup in the flowline versus time. If the absolute pressure buildup in the confined line segment downstream of the USV is in excess of that which represents a flow rate of 400 cubic centimeters per minute (0.4 cubic decimeter per minute) of liquid or IS standard cubic feet per minute (611.6 cubic meters per day) of gas. the USV should be repaired or replaced. An example with calculations is given in Appendix A. Test duration should be a minimum of 5 minutes.
3. Return well to production.
6.3 TESTING AFTER ONSITE REPAIRS
6.3.1 General
After onsite repair, a SSV/USV should be subjected to the appropriate test(s) listed in 6.3.2 to demonstrate proper assembly and operation. When repair on the SSV/USV actuator does not affect the SSV/USV valve, testing may be limited to that required in 6.1.1 or 6.2.1.
The test results should be documented on an SSVUSV Functional Test Data Sheet for Onsite Repairs similar to the example shown in Exhibit 3.
6.3.2 Testing
Recommendations for testing SSVs/USVs following onsite repairs are stated below. Testing may be limited according to onsite repairs performed.
6.3.2.1 Onsite repairs where the SS Vt/Sr actuator pressure containing seals an’ hivken or disturbed. The SSV’USV actuator should be tested for leakage using the SSV/USV actuator media. Test pressure should be normal field operating supply pressure. No leakage is allowed.
6.3.2.2 Onsite repairs that might alfrci the alignment of she gale (plug) and seats. The SSV’USV valve should be opened and checked visually or, if possible. with a drift mandrel for proper alignment.
6.3.2.3 On.cite repairs that might a/frct operation of the SSV/LLV The complete assembly should be tested for operational integrity; cycle the assembly fully open and fully closed three times with the SSVUSV valve body at ambient pressure or at well- head shut-in tubing pressure (SITP) with no flow. (If equipment through the first downstream block valve will not withstand full wcllhcad SITP, conduct this test at the working pressure of the downstream cquipmcni)
6.3.2.4 Onsite repairs that require breaking or disturbing a pressure containing seal in the SSV/LS[ vahie. The SSVIISV valve seals should be tested for leakage with the SSV/IJSV in a fully or partially open position and with the SSV/USV valve body exposed to maximum wellhead SliP Test duration should be a minimum of 5 minules with no leakage, (If equipment through the downstream block valve will not withsiand full wellhead SITP. conduct this test at ihe working pressure of the doustreain equipment.)
6.3.2.5 Onsite repairs that might affect the SSV/CJS seat seal. The SSV’USV valve seat should be tested according to 6.1 or 6.2 following the test prescribed in 6.3.2.4 above.