Open image in new window Fig. 6 Structure diagram of downhole safety equipment (1-inner cone coupling short-connection, 2-tubing ontology, 3-guide cone, 4-high-temperature sealed rubber sleeve, 5-sucker rod, 6-micro hydraulic cylinders, 7-die spring, 8-outer cone coupling short-connection).
Put suckers on the end (I mean little rubber tips) Finally, to polish off the outfit and make everything easy for you, take a quality quiver and place your arrows in it.
The first sucker artefact made of knitted nylon sheet reinforced silicone rubber has the same shape as the squid suckers.
Working deck injects fluid to rod cavity of micro-hydraulic cylinder, then piston compresses die spring, and high-temperature sealed rubber sleeve lowers with piston rod, opening the annular space between sucker rod and tubing.
By the promotion of axial force p, rubber sleeve goes up and deforms, sealing the annulus between the tubing and sucker rod.
Under the pull of piston rod, the rubber sleeve goes down after overcoming the squeezing and friction of part ③ and ④, opening the annulus between tubing and sucker rod.
When rod cavity of hydraulic cylinder releases pressure, piston rod extends outward by the function of die spring, and high-temperature sealed rubber sleeve enters the annular space along the guide cone, deforming under piston thrust and guide cone extrusion, then enclasps the sucker rod and shuts the well in.
Incorporating rubber cording, 18-karat gold and sterling silver, the designs look at home on the strapping and fashionable swimmer, who is an admitted sucker for all things Armani.
