A pressurizable assembly which comprises first and second assemblies. The first assembly has a plurality of cam grooves while the second assembly is size and shaped to intimately receive and mate with the first assembly. The second assembly has a connection member a plurality of radially mounted locking pin mechanisms for interacting with one of the plurality of spaced apart cam grooves. Axial movement of the second assembly, toward and away from the first assembly, causes the plurality of locking pin mechanisms to follow along the cam grooves to an intermediate locking position which locks the second assembly with the first assembly, while a subsequent axial movement of the second assembly, toward and away from the first assembly, causes the plurality of locking pin mechanisms to follow along the plurality of cam grooves and disengage the second assembly from the first assembly.

A pressurizable assembly which comprises first and second assemblies. The first assembly has a plurality of cam grooves while the second assembly is size and shaped to intimately receive and mate with the first assembly. The second assembly has a connection member a plurality of radially mounted locking pin mechanisms for interacting with one of the plurality of spaced apart cam grooves. Axial movement of the second assembly, toward and away from the first assembly, causes the plurality of locking pin mechanisms to follow along the cam grooves to an intermediate locking position which locks the second assembly with the first assembly, while a subsequent axial movement of the second assembly, toward and away from the first assembly, causes the plurality of locking pin mechanisms to follow along the plurality of cam grooves and disengage the second assembly from the first assembly.

A lift-ready flowhead assembly which is generally formed of a flowhead assembly, a lifting yoke, and a lift sub. The flowhead assembly includes (i) a flowhead body having body threads and a side entry port, (ii) a swivel housing, (iii) a load collar tube rotatively supported in the swivel housing by a bearing assembly, and (iv) a ball valve positioned in said flowhead body and configured to block and unblock a central passage running through the load collar tube and the flowhead body. The lifting yoke includes (i) a yoke body having a center aperture, and (ii) opposing pad-eyes extending from the yoke body. The lift sub includes (i) a head section, (ii) a neck section having external neck threads, and (iii) a sub passage extending through the head and neck sections. The neck section of the lift sub extends through the center aperture of the yoke body and the neck threads engage the body threads of the flowhead body, thereby securing the lifting yoke to the flowhead assembly.

A lift-ready flowhead assembly which is generally formed of a flowhead assembly, a lifting yoke, and a lift sub. The flowhead assembly includes (i) a flowhead body having body threads and a side entry port, (ii) a swivel housing, (iii) a load collar tube rotatively supported in the swivel housing by a bearing assembly, and (iv) a ball valve positioned in said flowhead body and configured to block and unblock a central passage running through the load collar tube and the flowhead body. The lifting yoke includes (i) a yoke body having a center aperture, and (ii) opposing pad-eyes extending from the yoke body. The lift sub includes (i) a head section, (ii) a neck section having external neck threads, and (iii) a sub passage extending through the head and neck sections. The neck section of the lift sub extends through the center aperture of the yoke body and the neck threads engage the body threads of the flowhead body, thereby securing the lifting yoke to the flowhead assembly.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

Coating compositions for coating an oilfield operational component, and related methods, may include in some aspects a coating composition having a trifunctional silane, a silanol, and a filler. The coating composition may be applied to a surface of the oilfield operational component that is configured to be exposed to a fluid. The coating composition may be applied to at least partially cover or coat the surface. The coating composition may be configured to chemically bond with a cured primer composition that includes an epoxy.

The present invention relates to a preheating device for welding oil, gas, and geothermal wellheads of varying diameters and thicknesses which is applicable to the oil, gas, and geothermal industry. The preheating of head and coating pipes to be welded do not cool down quickly. The cooling speed reduction prevents structures or joints from being less susceptible to cracking by maintaining the necessary heat thus preventing the integrity of the joints from being exposed. The preheating of head and coating to be welded maintains a uniform and constant temperature avoiding temperature changes, thus making the structures or joints less susceptible to cracking by maintaining the necessary heat and preventing the integrity of the joints from being exposed.

The present invention relates to a preheating device for welding oil, gas, and geothermal wellheads of varying diameters and thicknesses which is applicable to the oil, gas, and geothermal industry. The preheating of head and coating pipes to be welded do not cool down quickly. The cooling speed reduction prevents structures or joints from being less susceptible to cracking by maintaining the necessary heat thus preventing the integrity of the joints from being exposed. The preheating of head and coating to be welded maintains a uniform and constant temperature avoiding temperature changes, thus making the structures or joints less susceptible to cracking by maintaining the necessary heat and preventing the integrity of the joints from being exposed.

A method of inhibiting corrosion of a metal surface may include contacting the metal surface with a corrosion inhibitor compound that includes a substituted carboxamide.

A rod lock out clamp is disclosed. The lock out clamp includes a housing having a central bore for receiving a rod in spaced relation therethrough and clamp members in the housing for grippingly and frictionally engaging the rod in the bore. At least one of the clamp members has an inner end and a recess in the inner end, the recess having a profile with an arcuate portion having a radius of curvature that reduces from a maximum radius to a minimum radius. Manipulating means are coupled to the housing and the clamp members for moving the clamp members between a rod gripping position and a retracted position.