A GLV-gas lift valve that employs TSMS-two simultaneous mechanical stops, first one when SEWB-single edge welded bellow 8 is fully compressed to solid by valve dome pressure 5 and second mechanical stop where adjustable sealing arrangement with compressible seal 25, threaded regulating nut 17 and threaded jam nut 18 are compressed against orifice 15, compressible seal 25 is fully compressed into groove 30, gap 26 is fully exhausted, dimension L reaches zero, and gap 31 is completely exhausted, providing second mechanical stop between TC ball 14 and orifice 15. Sealing arrangement can be TC-Tungsten carbide ball 14 butted against orifice 15, flat, conical or curved sealing surface containing said compressible seal, that is solidly compressed against SEWB or DEWB, thus providing second mechanical stop and sealing fluid flow through GLV. Compressing SEWB/DEWB to full solid protects bellow from high dome pressure 5 while “Fortress Seal™” per U.S. Pat. No. 11,424,732 B2 protects bellow from high injection pressure.

High pressure gas lift valve with dual edge welded bellow subassembly where two bellows are incorporated in sealed configuration filled with silicone oil. Bellows are of different sizes featuring equal volumetric oil displacement for the pre-set total compression/expansion which corresponds to equal stem travel. By design both bellows can be fully compressed solid preventing bellows overstressing allowing extremely high pressure to be applied to both bellows. Lower bellow effective area is larger for orifice area than upper bellow area. This eliminates differential pressure across the bellows during valve opening resulting in equalized internal/external bellow stresses. Both bellows work only in compression from free length to full compression. This results in bellow internal/external pressure and stress level equalization and long cycle life. Valve withstands high injection pressure for well integrity testing. Once lower bellow is fully compressed solid high pressure would not be transmitted to upper bellow and vice versa.

A bellows valve includes a first bellows connected to a first cap member at one end and to a support member at the other end, and a second bellows connected to a second cap member at one end and to said support member at the other end. Respective first and second bellows cavities are thus formed inside each bellows. An orifice is arranged to fluidly interconnect the first and second bellows cavities, and a bellows-internal valve device is arranged to selectively open and close the orifice. The bellows-internal valve device includes first and second resilient members arranged on respective first and second sides of the support member and having respective portions being coupled to respective first and second holding members on the valve device. The bellows valve is useful in injection valves, such as gas lift valves.

The present invention relates to a downhole straddle assembly for straddling over a zone downhole in a well, the straddle assembly comprising a plurality of tubular sections mounted end to end in succession to form one tubular pipe having a first end tubular section forming a first open end of the tubular pipe, and a second end tubular section forming a second open end of the tubular pipe, said tubular pipe having an outer diameter, wherein the tubular section mounted to the first end tubular section is a first expandable metal sleeve being more pliant than the first end tubular section, and the tubular section mounted with the second end tubular section is a second expandable metal sleeve being more pliant than the second end tubular section. Furthermore, the present invention relates to a downhole straddle system for straddling over a zone downhole in a well and to a downhole straddle method.

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The present disclosure provides methods and apparati for separating liquids from production gases and recovering the liquids. The methods and apparati of the present disclosure can reduce or eliminate emissions compared to standard methods and devices and also eliminate the need for haul away of liquids by collecting compressor system liquids in charge vessel(s). The methods and apparati of the present disclosure can also be used to fuel the engines which operate the compressor systems using gas from the compressor drains and the gas used to drain the charge vessel(s).

A system for enhancing a flow of a fluid induced by a gas lift system includes one or more sensors and a gas lift control unit configured to control the flow of the fluid induced by the gas lift system. The gas lift control unit is configured to: (a) receiving signals representing measured data from the one or more sensors, (b) calculating a desired gas injection rate and its associated flow of fluid based, at least in part, on the measured data, (c) regulating at least one operating characteristic of a compressor associated with the gas lift system based, at least in part, on the desired gas injection rate, (d) receiving measured data representing production data, and (e) determining a subsequent adjustment based on a comparison of the desired flow of fluid and the production data.

An apparatus of removing substances from horizontal wells drilled from a surface comprises: a casing, a tubing disposed within the casing, a downhole pump connected to an end of the tubing, and a production conduit attached to the downhole pump. The apparatus has a gas containing section of the well that leads to the production conduit. The gas containing section is configured to accumulate a first predetermined volume of gas. An annular space is formed by the casing, tubing and production conduit. A first one-way valve is disposed within the production conduit and that leads to the annular space. A first vessel contains a working fluid. The first vessel is in fluid communication with the first one way valve.

An unloading plunger having a chamber for compressed gas and a method for unloading liquid from a wellbore via ascending of the unloading plunger including ascending via formation pressure the unloading plunger from the bottom portion of the wellbore to a rest position at a wellhead and releasing compressed gas from the chamber into the wellbore during the ascending to decrease hydrostatic pressure of liquid in the wellbore above the unloading plunger.

This invention is a flow control mechanism for self-contained Gas Lift Valves (GLVs) for artificial lift of oil or liquid loaded gas wells. This invention is an improvement on what currently exists. Rather than obstruct the flow by partially or fully obstructing a fixed aperture (commonly a stem/ball and seat), where the fluid pressure and dynamic forces affect the actuating force; this invention applies the actuating force to a variable aperture flow control mechanism, for which fluid pressure and dynamic forces do not affect the applied actuating force.

By orienting the fluid pressure gradient and resultant applied force perpendicular to the actuating force and action, fluid throttling by changes in available aperture does not affect the actuating force applied to the variable aperture device. Actuating force is applied vertically while fluid pressure/force acts horizontally. For a three dimensional cylinder construction, actuating force is applied axially while pressure/fluid force acts radially.

The present disclosure provides methods and apparati for separating liquids from production gases and recovering the liquids. The methods and apparati of the present disclosure can reduce or eliminate emissions compared to standard methods and devices and also eliminate the need for haul away of liquids by collecting compressor system liquids in charge vessel(s). The methods and apparati of the present disclosure can also be used to fuel the engines which operate the compressor systems using gas from the compressor drains and the gas used to drain the charge vessel(s).