Follow-up centering sealing device of pumping well head
A technology of sealing device and sealing ring, which is applied in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve the problems such as the lateral error of the polished rod and the inconvenience for the operator to replace the packing.
Inactive Publication Date: 2011-01-26
南通市中庆机械厂
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Problems solved by technology
The sphere-shaped matching structure between the base and the gate cavity is adopted to form the adjustment mechanism of the wellhead device, which solves the problem of the deviation of the wellhead, but does not solve the lateral error of the oil pumping rod, and it is inconvenient for the operator to replace the packing
Method used
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Embodiment 1
[0010] Embodiment 1: The follow-up center pumping wellhead sealing device has packing installed in the packing box 5 to seal the oil pumping rod. There are two sets of packing, packing one 3 and packing two 4, among which the packing One end of the outer circle of root 24 is a cone, and the outer circle is threaded. There is a gland 1 that presses the packing through the pressing cap 2. There is a spherical structure matching the seat 12 and the rod 9. The seat 12 and the rod 9 are pressed by the ball head. The cover 10 is pressed tightly and sealed by the sealing ring 11. One end of the spherical structural rod 9 is connected with the fixed sliding disk seat 8, and the fixed sliding disk seat 8 is connected with the packing box 5 through the pressure plate 6. The fixed sliding disk seat The center of 8 can move relative to the center of packing box 5, and the inner hole of fixed slip disk seat 8 cooperates with the outer circle clearance of packing box 5, and its clearance is ...
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The invention relates to a follow-up centering sealing device of a pumping well head, which seals a pumping polished rod by packings arranged in a packing box. The sealing device is provided with a gland which tightly compresses the packings by means of nuts and a seat and a rod which are matched with each other based on ball structures, are tightly compressed by a ball head gland and are sealed by a seal ring, one end of a ball structure rod is connected with a fixed sliding disk seat, the fixed sliding disk seat is connected with a pressure disk by the packing box, and the center of the fixed sliding disk seat can move relative to the center of the packing box; and the number of the packings is two, wherein the outer circle end of one packing is formed into a cone, and the outer circle is provided with a thread. The inner hole of the fixed sliding disk seat forms clearance fit with the outer circle of the packing box, and the clearance is twice of that in the movement of the center. Because the fixed sliding disk seat can move relative to the center of the packing box, the invention realizes the movement of centers between the packings and the seat and the rod which are matched with each other based on ball structures, thereby eliminating the lateral error of the pumping polished rod. By forming the outer circle end of one packing into a threaded cone based on the two-packing design, the invention facilitates the installation and the replacement of the packings.
Description
1. Technical field [0001] The invention relates to an oil pumping well head, in particular to a sealing device for a follow-up centering oil pumping well head. 2. Background technology [0002] Rod pumping system is the main way of crude oil production in my country. The performance of the wellhead polished rod sealing device in the ground equipment of this system directly affects the working quality of the ground pumping equipment. At present, the oil pumping wellhead sealing device is mainly used, and the fixed wellhead polished rod sealing device is used. The sealing device installs the polished rod sealer on the upper tee of the wellhead Christmas tree, puts the packing into the inner cavity of the upper packing box of the main body of the sealer, and then presses it tightly with the Glen and the sealing box pressing cap, so that the inner part of the sealing ring The round surface is entangled with the outer surface of the polished rod, and then the annular cavity form...
Claims
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IPC IPC(8): E21B33/03
Inventor 赵忠
Owner 南通市中庆机械厂