The present invention discloses a novel double-valve continuous circulating valve with a clamping device, comprising a main through valve (5), a pup joint body (8), a middle connector (11) and a bypass valve (12); the main through valve seat (4), the main through valve (5) and the main through valve spring (6) are press-fitted in the pup joint body (8) through a main through valve limiting device (1); a bypass valve seat (10) is arranged at the lower side of the pup joint body (8), and the bypass valve (12) is mounted and fixed to the bypass valve seat (10) through a bypass valve limiting device (9); the middle connector (11) is press-fitted on the pup joint body (8) through a clamping device. The present invention solves the technical problems of dangerous incidents caused by the suspension of circulating medium.

A port for use in introducing a fluid into an internal fluid chamber includes a plug bore, a valve disposed in the plug bore and a plug. The plug includes one or more seal grooves and a ring seal in each of the one or more seal grooves. The ring seal creates a seal between the plug and the plug bore. The port further includes a positive stop barrier that prevents the plug from being removed from the plug bore.

The disclosed embodiments include systems and methods for recording a pressure profile using a sensor connected to a flowline, generating a pressure pulse in the flowline by closing a valve connected to the flowline, calculating a first derivative and a second derivative of the pressure profile, and determining a parameter of the pressure pulse based on the first derivative and the second derivative of the pressure profile.

The disclosed embodiments include systems and methods for recording a pressure profile using a sensor connected to a flowline, generating a pressure pulse in the flowline by closing a valve connected to the flowline, calculating a first derivative and a second derivative of the pressure profile, and determining a parameter of the pressure pulse based on the first derivative and the second derivative of the pressure profile.

A system for liquid surge protection of a subsea riser having a horizontal portion on the seabed and a sag bend portion includes: a flexible tubing having a top end and a bottom end; a plurality of autonomous valves configured to permit liquid to pass through into the flexible tubing, wherein the autonomous valves are arranged between the top end and the bottom end of the tubing; and an inlet device coupled to the bottom end of the flexible tubing, wherein said inlet device is biased against a bottom wall the riser.

A system for liquid surge protection of a subsea riser having a horizontal portion on the seabed and a sag bend portion includes: a flexible tubing having a top end and a bottom end; a plurality of autonomous valves configured to permit liquid to pass through into the flexible tubing, wherein the autonomous valves are arranged between the top end and the bottom end of the tubing; and an inlet device coupled to the bottom end of the flexible tubing, wherein said inlet device is biased against a bottom wall the riser.

A valve block may have a cross-drill intersection bore formed within the valve block by a first flow bore intersecting a second flow bore. Additionally, at least one insert may be within the first flow bore or the second flow bore. The at least one insert may include a wall contacting an inner surface of the first flow bore or the second flow bore, a passageway defined within the wall and having openings at opposite ends of the insert, and a plurality of vanes extending from an inner surface of the wall into the passageway. The one of the opposite ends of the at least one insert may align with a surface of the cross-drill intersection bore. The at least one insert may reduce and/or protect the bores within the valve block from erosional damage

A pressure assisted oil recovery system and apparatus that has a pulsating effect unit, a multiphasic flow meter, and a production lift system that passes through a wellbore up to an oil reservoir. The pulsating effect unit has a control valve and a smart control unit. The production lift system has production tubing and a wellhead. The pulsating effect unit is connected to the production lift system. The multiphasic flow meter is connected to the production tubing to obtain well production parameters data. The control valve opens and closes having an opening/closing predetermined frequency. When the control valve opens and closes, it generates pressure variations along the production tubing. The pressure variations create a pulsating effect on walls of the wellbore. The multiphasic flow meter and the pulsating effect unit set an optimal opening/closing frequency of the control valve.

A pressure assisted oil recovery system and apparatus that has a pulsating effect unit, a multiphasic flow meter, and a production lift system that passes through a wellbore up to an oil reservoir. The pulsating effect unit has a control valve and a smart control unit. The production lift system has production tubing and a wellhead. The pulsating effect unit is connected to the production lift system. The multiphasic flow meter is connected to the production tubing to obtain well production parameters data. The control valve opens and closes having an opening/closing predetermined frequency. When the control valve opens and closes, it generates pressure variations along the production tubing. The pressure variations create a pulsating effect on walls of the wellbore. The multiphasic flow meter and the pulsating effect unit set an optimal opening/closing frequency of the control valve.

Embodiments of the present disclosure relate to a choke valve that includes a choke body, a choke trim disposed in the choke body, where the choke trim is configured to adjust a cross-sectional area of a flow path in the choke body to adjust a fluid flow through the choke valve, a needle of the choke trim disposed in the flow path of the fluid flow, where the needle includes a first portion having a superhard material, a seat of the choke trim, where the needle is configured to move along an axis extending through an opening of the seat to adjust the fluid flow through the choke valve.