Oil wells
First Claim
1. An oil well comprising:
- a production tubular;
a pump barrel connected to the lower end of said production tubular;
a pump plunger reciprocably positioned within said pump barrel;
a sucker rod string connected to said pump plunger for raising and lowering said pump plunger within said pump barrel;
an annular jacket concentrically mounted about said production tubular at a point just above said pump barrel, said jacket forming a chamber about said production tubular;
means for communicating the interior of said production tubular with the interior of said chamber;
an inflatable bladder means positioned within said chamber and adapted to occupy substantially the entire volume of said chamber when fully inflated; and
means for inflating said bladder means with a gas under pressure wherby fluids pumped by said pump plunger will act against said bladder means to compress said gas in said bladder means to allow a portion of said fluids to temporarily enter said chamber to thereby substantially reduce pressure surges arising from elastic deformation of a column of fluids.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to an oil well comprising a production tubular with a pump barrel attached to its lower end, a reciprocable oil pump having a plunger located within the pump barrel, a sucker rod string extending downwardly from ground level to the plunger for reciprocating the plunger, means for cyclically raising the sucker rod string, a chamber located and arranged so as to be open to oil pressure immediately above the plunger, wherein the chamber is located externally of the production tubular, the chamber is in communication with the interior of the production tubular and the chamber contains a resilient bladder member arranged to occupy normally substantially the whole volume of the chamber to be connected to a source of pressurized gas through a non-return valve, to contain and maintain gas at the static oil pressure and to occupy a reduced volume of the chamber when the oil pressure immediately above the plunger increases due to pressure surges arising from elastic deformation of a column of oil.
37 Citations
5 Claims
-
1. An oil well comprising:
-
a production tubular; a pump barrel connected to the lower end of said production tubular; a pump plunger reciprocably positioned within said pump barrel; a sucker rod string connected to said pump plunger for raising and lowering said pump plunger within said pump barrel; an annular jacket concentrically mounted about said production tubular at a point just above said pump barrel, said jacket forming a chamber about said production tubular; means for communicating the interior of said production tubular with the interior of said chamber; an inflatable bladder means positioned within said chamber and adapted to occupy substantially the entire volume of said chamber when fully inflated; and means for inflating said bladder means with a gas under pressure wherby fluids pumped by said pump plunger will act against said bladder means to compress said gas in said bladder means to allow a portion of said fluids to temporarily enter said chamber to thereby substantially reduce pressure surges arising from elastic deformation of a column of fluids. - View Dependent Claims (2, 3, 4, 5)
-
Specification