Petroleum and natural gas industries — Subsurface safety valve systems — Design, installation, operation and repair

Lays down the recommended practice. Requirements are specified in the third edition of API Recommended Practice 14B (RP 14B), January 1990, which is adopted as ISO 10417. For the purposes of international standardization, modifications have been made that are outlined.

Industries du pétrole et du gaz naturel — Systèmes de vannes de protection de fond de puits — Étude, installation, fonctionnement et réparation

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ISO 10417:1993 - Petroleum and natural gas industries -- Subsurface safety valve systems -- Design, installation, operation and repair
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Standards Content (Sample)

IS0 10417:1993(E)
RP 14B: Design, Installation, Repair and Operation of Subsurface Safety Valve Systems
For oil ~~41s. the preswre t)uil(l-I.;!) depends on the
1. Record the control pressure.
static fluid lwcl and the amount of pw in thtl oil. If
2. Isolate the control system from the well to be te,cted.
the fluid level is below the SCSSK the formula for
gas wells can be used. If the fluid Icwl is abow the
3. Shut the well in at the wellhead.
SCSW, the leakage rate should be mcawred.
4. Wait a minimum of five minutes. Check the control
line for loss of pressure which may indicate a leak in
. If the SCSSV failed to close or if the leakage rate
the system.
exceeds 900 SCF gas per hour (15 SCF/min.). or 6.3
gallons of liquid per hour (4OOcc/min.), corrective
.5. Bleed the control line pressure to zero to shut in the
action should be taken.
SCSSV. Close in the control line system and observe
for pressure buildup which may indicate a faulty
. After the SCSSL’ tests wccessfull!-. use the follow-
SCSSV system. If such pressure buildup occ’urs.
i ng recdm mended reopen i ng procedure:
corrective action should be taken.
6. Bleed the pressure off the wellhead to the lowest
a. SCSSVs with Equalizing Features
practical pressure and then shut in the well at the
wing or flowline valve. When possible. bleed flowline
header pressure doll-n to or below wellhead pressure (1) With external pressure source.
and observe the flowline and wellhead for a change
in pressure which would indicate a faulty surface
Pressure the tubing above the valve until the
valve. Any leaks through the xing or flowline valve
pump thou feature of the SCSS\’ functions to
must be repaired before proceeding with the test.
indicate the pressures arti equalized. When
equalized. slowly increase contro1 1 ine pre+
7. Conduct leakage test and document results. For gas
sure to the value recorded in Step 1 or to the
wells, flow rates can be computed from pressure
prcssurc est:Ushcd for normal opwitiiww.
build-up by the formulas.
(2) Without external pressure source.
Q=2122 (A;) (&) (;)
With the well shut in. increase control pres-
Q = I xv% N Ck ifs)
sure slowly until the tubing pressure begins
c9 (it-) (;)
to increase. Close the manifold control valve
and record the opening pressure. When the
where nP is the final P (pressure in psia) (B~j*j
stabilizes. pressure up the
tubing pressure
z divided by final’2 (gas deviation fac-
( >
control system to open the SCSSV. Increase
tor) minus initial P divided by initial
the hydraulic control line pressure to the
value recorded in Step 1, or at least 500 psi
is the leakage rate, SCF,/Hr. greater than the opening pressure.
at is the build-up time in minutes to
b. SCSSVs without Equalizing Features
reach a stabilized pressure.
An external pressure source should b

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