A test sample is extracted from a hydrogen induced cracking (HIC) resistant material candidate. A control sample is extracted from a prequalified HIC susceptible material that is known to suffer predetermined HIC damage when subjected to preset test conditions of a standardized HIC test (e.g., NACE TM0284). The HIC test is performed on the test and control samples. A value of a predetermined cracking criteria is calculated for the control sample. It is determined whether the calculated value of the predetermined cracking criteria is at least equal to a predetermined minimum threshold value. If yes, respective values of a plurality of predetermined HIC resistance criteria for the test sample are calculated. It is determined whether the calculated respective values of the plurality of predetermined HIC resistance criteria for the test sample are not greater than corresponding predetermined maximum threshold values. If yes, the HIC resistant material candidate is qualified as a valid source for sour service applications.

An apparatus to simulate biocide performance in crude oil pipeline conditions is disclosed. The apparatus includes: a reactor to simulate a two-phase crude oil pipeline which includes a crude oil phase above a water phase. The reactor has an agitator to control a flow of the water phase in the reactor in response to a motor that drives an agitation rate of the agitator. A crude oil inlet supplies crude oil to the reactor for the crude oil phase. A water inlet supplies water to the reactor for the water phase. A control circuit is configured by code to control a proportion of the water to the crude oil supplied to the reactor and to control the motor to drive a desired agitation rate of the agitator. A biocide inlet supplies biocide to the reactor. A water sample outlet enables sampling of the water phase of the reactor.

A tool for monitoring conditions within a subterranean well includes a first body segment, the first body segment being an elongated member with an axial protrusion having a reduced outer diameter. A second body segment is sized for mating with the first body segment. A metal specimen circumscribes the axial protrusion of the first body segment so that an outer diameter surface of the metal specimen defines an outer diameter of the tool. A connection assembly releasably secures the first body segment to the second body segment.

A lead attachment assembly for attaching a lead to an outer surface of a metal pipe includes a lead fitting having an inner surface, an outer surface, and opposing ends. At least one magnet is carried by the inner surface of the lead fitting. The end of a lead wire is fixed to the inner surface of the lead fitting. A conductive epoxy applied to the inner surface of the lead fitting contacts the outer surface of the pipe when positioned. The magnets hold the lead fitting in position while the epoxy cures.

Assemblies and methods for monitoring the cathodic protection of underground or submerged structures may include a coupon assembly including a conductive test coupon and a reference electrode for determining the voltage potential difference of the protected structure without substantially interrupting surrounding current sources. The reference electrode may be at least partially covered with an electrolytic material in electrical contact with the surrounding environment via a plug including a porous material. A method of installation of the assembly may allow a single technician to install the coupon assembly using a probe rod without extensive on-site excavation. The coupon assembly may be configured to seat securely with the probe rod for stability during installation, and release from the probe rob when the probe rod is separated from the coupon assembly and withdrawn from the ground, leaving the coupon assembly at a preselected depth or preselected distance from the protected structure.

A first type of coupon holder includes an elongated core that is axially aligned with a coupon holder axis and an external surface that circumscribes the elongated core. The external surface defines coupon mounting surfaces with different radial orientations relative to the coupon holder axis. The coupon mounting surfaces are circumferentially aligned around the elongated core and have geometric centers with the same axial position along the coupon holder axis. A second type of coupon holder includes an elongated support structure that is axially aligned with a coupon holder axis and a coupon holder body positioned to have an end face in a plane transverse to the coupon holder axis. The coupon holder body has a plurality of slots to receive end portions of coupons. The slots are in a circular arrangement around the coupon holder axis and position coupons in parallel to the coupon holder axis.

An example test station assembly of a cathodic protection monitoring assembly includes a face plate including a plurality of openings. In addition, the test station assembly includes a plurality of test posts to pass through the plurality of openings. Further, the test station assembly includes a plurality of electrically non-conductive identification indicators to connect to the plurality of test posts on the face plate. Each of the plurality of identification indicators including one or more identifying characteristics to identify a corresponding voltage source of a plurality of underground voltage sources associated with an at least partially buried structure, a cathodic protection system for the buried structure, or the cathodic protection monitoring assembly. Still further, the test station assembly includes a plurality of electrical conductors to electrically connect the plurality of test posts to the plurality of underground voltage sources.

A test station assembly for monitoring a cathodic protection system of a buried or submerged structure includes a housing including an inner chamber a connector, and an opening. In addition, the test station assembly includes a pole to connect to the connector such that an electrical conductor extending through the pole and connected to a coupon assembly is configured enter into the inner chamber. Further, the test station assembly includes a face plate to attach to the housing to at least partially cover the opening and an electrically conductive test post to connect to the face plate. Still further, the test station assembly includes a cap to cover the test post outside of the inner chamber. The cap includes an internal passage to receive the test post therein, and an opening into the internal passage to receive a probe of a voltmeter therethrough to contact the test post.

Assemblies and methods for maintaining cathodic monitoring of underground structures may include an electrode watering assembly having a cap that includes a cap body of a rigid material defining one or more chambers adjacent to a proximal electrode end of a permanent reference electrode when installed thereon. The cap body may include a distal cap end defining a distal opening configured to be disposed around the proximal electrode end and a proximal cap end defining a proximal opening. The electrode watering assembly may include a conduit having a flexible material. The conduit may include a distal conduit end configured to be fluidly coupled to the proximal opening and a proximal conduit end configured to be positioned at a cathodic test station, such that fluid directed into the proximal conduit end is directed through the conduit and into the one or more chambers for watering at least the proximal electrode end.

A quick release corrosion coupon holder system comprising a shaft and a clip configured to pivot between open and closed positions to securely hold an end of a corrosion coupon. Preferably, no nuts, bolts, or removable parts are required to install or remove a coupon from the holder. Preferably a spring is disposed between the shaft and clip with one or more attached legs or a separate pin configured to secure the clip to the shaft and act as a fulcrum. An optional inwardly extending projection may be inserted through an aperture on the coupon. An optional spacer creates a gap between the shaft and clip to accommodate the thickness of a coupon. Preferably a lip and shoulder pair on the clip and an opposing lip and shoulder pair on the shaft contact front and back surfaces of the coupon, limiting contact surface area between the holder and coupon.