§ 250.874. Subsea water injection systems.
472 words·~2 min read·
/us/cfr/t30/s§ 250.874·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
If you choose to install a subsea water injection system, your system must comply with your approved DWOP, which must meet the following minimum requirements:
(a)Adhere to the water injection requirements described in API RP 14C (incorporated by reference as specified in § 250.198) for the water injection equipment located on the platform. In accordance with § 250.830, either a surface-controlled SSSV or a water injection valve
(WIV)that is self-activated and not controlled by emergency shut-down
(ESD)or sensor activation must be installed in a subsea water injection well.
(b)Equip a water injection pipeline with a surface FSV and water injection shutdown valve (WISDV) on the surface facility.
(c)Install a PSHL sensor upstream (in-board) of the FSV and WISDV.
(d)Use subsea tree(s), wellhead(s), connector(s), and tree valves, and surface-controlled SSSV or WIV associated with a water injection system that are rated for the maximum anticipated injection pressure.
(e)Consider the effects of hydrogen sulfide
(H2S)when designing your water flood system, as required by § 250.805.
(f)Follow the valve closure times and hydraulic bleed requirements according to your approved DWOP for the following:
(1)Electro-hydraulic control system with water injection,
(2)Electro-hydraulic control system with water injection with loss of communications, and
(3)Direct-hydraulic control system with water injection.
(g)Comply with the following injection valve testing requirements:
(1)You must test your injection valves as provided in the following table: Valve Allowable leakage rate Testing frequency
(i)WISDV ``` ``` Zero leakage ``` ``` Monthly, not to exceed 6 weeks between tests.
(ii)Surface-controlled SSSV or WIV ``` ``` 400 cc per minute of liquid or 15 scf per minute of gas ``` ``` Semiannually, not to exceed 6 calendar months between tests. ``` ``` ``` ``` ``` ```
(2)If a designated USV on a water injection well fails the applicable test under § 250.880(c)(4)(ii), you must notify the appropriate District Manager and request approval to designate another ANSI/API Spec 6A and API Spec. 6AV1 (both incorporated by reference in § 250.198) certified subsea valve as your USV. ``` ```
(3)If a USV on a water injection well fails the test and the surface-controlled SSSV or WIV cannot be tested as required under (g)(1)(ii) of this section because of low reservoir pressure, you must submit a request to the appropriate District Manager with an alternative plan that ensures subsea shutdown capabilities. ``` ```
(h)If you experience a loss of communications during water injection operations, you must comply with the following: ``` ```
(1)Notify the appropriate District Manager within 12 hours after detecting loss of communication; and ``` ```
(2)Obtain approval from the appropriate District Manager to continue to inject during the loss of communication. ``` \[81 FR 61918, Sept. 7, 2016, as amended at 83 FR 49262, Sept. 28, 2018\]