초록 ▼

A tube shaped sleeve apparatus which includes two cylindrical components adapted to be connected to each other and sections of tubing string by cooperating threads formed at the ends thereof. At spaced intervals in the periphery of the sleeve are a plurality of radial holes or ports and formed in th

A tube shaped sleeve apparatus which includes two cylindrical components adapted to be connected to each other and sections of tubing string by cooperating threads formed at the ends thereof. At spaced intervals in the periphery of the sleeve are a plurality of radial holes or ports and formed in the sleeve bore at opposite ends thereof are stops shoulders. Adapted to be inserted in slidable relation inside the bore of the tubing sleeve is a mandrel which includes a plurality of resilient O-rings or gaskets that are secured in the periphery of the mandrel inside annular grooves formed therein. Formed in the bore of the mandrel and at opposite ends thereof are a second set of stop shoulders. When positioned opposite the holes in the sleeve, the periphery of the mandrel and the gaskets form a tight seal with the wall of the sleeve bore to prevent fluids and gases from the well bore from entering and escaping the tubing sleeve. Through the use of a sleeve operator, which is adapted to be attached to the bottom of a sub-surface rod pump, the mandrel inside the sleeve bore can be directed to shift longitudinally in the bore into a position either opposite or away from the holes to respectively close or open the holes, as desired.

대표청구항 ▼

A system suitable for use in conjunction with a tubing string in a well with an operational rod pump and a closed gas anchor, which comprises: a. an outer tubular member located below said pump comprising first and second cylindrical members, including a first means incorporated at one end of said f

A system suitable for use in conjunction with a tubing string in a well with an operational rod pump and a closed gas anchor, which comprises: a. an outer tubular member located below said pump comprising first and second cylindrical members, including a first means incorporated at one end of said first cylindrical member and a second means incorporated at one end of said second cylindrical member, said first and second means adapted to connect said first cylindrical member to said second cylindrical member, a third means incorporated at a second end of said first cylindrical member adapted to engage a cooperating fourth means incorporated at one end of a first tubing string member to connect said first cylindrical member to said first tubing string member, a fifth means incorporated at the second end of said second cylindrical member adapted to engage a cooperating sixth means incorporated at one end of a second tubing string member to connect said second cylindrical member to said second tubing string member, said outer tubular member including a plurality of spaced apart radial ports formed in the periphery of said outer tubular member through which fluids and gases are allowed to enter and exit and upper and lower circular shoulders formed in the bore of said outer tubular member at opposite ends thereof; b. an inner tubular member insertable into the bore of said outer tubular member in slidable relation therewith for opening and closing said radial ports, said inner tubular member having a slightly smaller external diameter than the diameter of said bore through which it moves axially between said upper and lower shoulders and including one or more gasket means in the periphery of said inner tubular member; and, c. an activator means that works independently of the oscillating rods while they are oscillating in an operating rod pump and engages said inner tubular member to move said inner tubular member axially within said outer tubular member, said activator means being adapted for attachment to the bottom of an inactive rod pump and including at least one cylindrical member having a plurality of integrally formed compressible elongated leg members depending therefrom whereby, when said depending leg members releasably engage said inner tubular member to move said inner tubular member longitudinally of said bore in a first direction between said upper and lower shoulders, said radial ports open to allow fluids and gases to flow between the interior and exterior of said outer tubular member and, when said inner tubular member is moved longitudinally of said bore in a second direction between said upper and lower shoulders, said radial ports are closed to prevent fluids and gases from flowing between the interior and exterior of said outer tubular member.