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CN-121993076-A - Wellhead polish rod sealing device

CN121993076ACN 121993076 ACN121993076 ACN 121993076ACN-121993076-A

Abstract

The invention relates to the technical field of oil field oil extraction wellhead devices, in particular to a wellhead polish rod sealing device, and aims to solve the technical problems of long time consumption caused by dependence on auxiliary tools in the process of replacing packing and inconvenience in operation in the related art. The wellhead polish rod sealing device comprises a packing ejection mechanism, wherein the packing ejection mechanism comprises a packing box and a packing ejector rod, the packing ejector rod is sleeved on the polish rod, and the packing box is sleeved on the packing ejector rod and is in threaded connection with the packing ejector rod. The packing box, the packing ejector rod and the polish rod enclose a containing cavity for containing packing. The rotation of the packing box around the packing post rod is used to change the length of the receiving cavity. This well head polished rod sealing device forms the adjustable chamber that holds of length through threaded connection's packing box and packing ejector pin, makes the packing by the packing ejector pin release through shortening holding the chamber, need not appurtenance, has realized the quick replacement of packing. The technical problems that the existing packing box depends on auxiliary tools in the packing replacement process and is inconvenient to operate, so that the time consumption is long are solved.

Inventors

  • TENG FEI
  • LIANG TAO
  • KONG FANGANG
  • LI WEIRAN
  • MA CHUNHUI
  • LIU XIAOXIAO
  • ZHAI YANG
  • XIAO TAO
  • CAI GUOLEI
  • LIU JIAN

Assignees

  • 中国石油集团渤海钻探工程有限公司
  • 中国石油天然气集团有限公司

Dates

Publication Date
20260508
Application Date
20241107

Claims (10)

  1. 1. A wellhead polish rod sealing device, comprising: the packing ejection mechanism (100), the packing ejection mechanism (100) comprises a packing box (110) and a packing ejector rod (120), the packing ejector rod (120) is sleeved on a polished rod (001), the packing box (110) is sleeved on the packing ejector rod (120) and is in threaded connection with the packing ejector rod (120), the packing box (110), the packing ejector rod (120) and the polished rod (001) enclose an annular accommodating cavity (101) for accommodating packing (002), and rotation of the packing box (110) around the packing ejector rod (120) is used for changing the length of the annular accommodating cavity (101).
  2. 2. The wellhead polish rod sealing device of claim 1, wherein: The polish rod sealing device comprises a polish rod (001), and is characterized by further comprising a second seal separating mechanism (200), wherein the second seal separating mechanism (200) comprises a seal separating box (210), a seal separating ejector rod (220) and a rubber core (230), the seal separating ejector rod (220) is sleeved on the polish rod (001), the seal separating box (210) is sleeved on the seal separating ejector rod (220) and is in threaded connection with the seal separating ejector rod (220), the seal separating box (210), the seal separating ejector rod (220) and the polish rod (001) enclose a seal separating cavity (201), the rubber core (230) is installed in the seal separating cavity (201), and the seal separating cavity (201) can be changed by rotating the seal separating box (210) around the seal separating ejector rod (220) so that the rubber core (230) is extruded and is tightly held by the polish rod (001).
  3. 3. The wellhead polish rod sealing device of claim 2, wherein: The sliding disc deviation adjusting mechanism (300) comprises a clamp body (320), a sliding disc (310) and a sliding disc adjusting screw (330), wherein the clamp body (320) is sleeved on the polished rod (001), the sliding disc (310) is installed on the clamp body (320) and sleeved on the polished rod (001), the packing ejector rod (120) is connected with one end, far away from the packing ejector rod (220), of the packing box (210), the packing ejector rod (220) is connected with one end, far away from the clamp body (320), of the sliding disc (310), a plurality of sliding disc adjusting screws (330) are uniformly distributed around the axis of the clamp body (320) and respectively abut against the periphery of the sliding disc (310) to adjust the radial positions of the sliding disc (310) and the polished rod (001).
  4. 4. A wellhead polish rod sealing device according to claim 3, characterised in that: The packing ejection mechanism (100) further comprises a gland (130), wherein the gland (130) is in threaded connection with the packing box (110) and is far away from one end of the packing ejector rod (120) and sleeved on the polish rod (001), and the gland is used for sealing the annular accommodating cavity (101) and applying pressure to the packing (002) stacked in the annular accommodating cavity (101) so that the packing (002) is tightly attached to the polish rod (001).
  5. 5. The wellhead polish rod sealing device of claim 4, wherein: the gland (130), the packing ejector rod (120) and the seal isolation box (210) are respectively provided with a wear-resistant shaft sleeve (131) on the joint surface of the gland and the polish rod (001).
  6. 6. The wellhead polish rod sealing device of claim 1, wherein: The packing ejection mechanism (100) further comprises a packing box jackscrew (140), and the packing box (110) is fixed to the packing ejector rod (120) through the packing box jackscrew (140).
  7. 7. The wellhead polish rod sealing device of claim 2, wherein: the second seal separating mechanism (200) further comprises a seal separating box jackscrew (240), and the seal separating box (210) is fixed to the seal separating ejector rod (220) through the seal separating box jackscrew (240).
  8. 8. The wellhead polish rod sealing device of claim 4, wherein: The sliding disc deviation adjusting mechanism (300) further comprises a plug (340) and plug jackscrews (350), the plug (340) is in threaded connection with the clamp body (320) and is abutted against the sliding disc (310), the plug (340) rotates around the clamp body (320) to apply thrust to the sliding disc (310) so that the sliding disc (310) is abutted against the clamp body (320), and a plurality of plug jackscrews (350) are uniformly distributed around the axis of the clamp body (320) and are respectively abutted against the periphery of the plug (340).
  9. 9. The wellhead polish rod sealing device of claim 8, wherein: An electronic tag is arranged in the plug (340).
  10. 10. The wellhead polish rod sealing device of claim 8, wherein: Gland (130) packing box (110), separate seal box (210) with end cap (340) all are provided with screw hole (102) at the outer wall, screw hole (102) detachably are connected with the handle, are convenient for apply force rotatory.

Description

Wellhead polish rod sealing device Technical Field The invention relates to the technical field of oil extraction wellhead devices in oil fields, in particular to a wellhead polish rod sealing device. Background In oilfield exploitation operation, a packing box of an oil pumping unit in a wellhead polished rod sealing device is a key component for ensuring wellhead sealing, and plays a vital role in a working environment with high temperature and high pressure and continuous friction. However, the existing packing boxes need to rely on auxiliary tools in the process of replacing the packing, and are time-consuming, and often need to perform the step of emptying and pressure relief, thereby increasing the complexity and time cost of the whole operation. Especially when the packing at the bottom of the packing box is taken out, the problem is obvious. The existing packing box has the technical problems that the packing replacement process depends on auxiliary tools and is inconvenient to operate, so that the time consumption is long. Disclosure of Invention The invention aims to provide a wellhead polished rod sealing device, which solves the technical problems of long time consumption caused by the fact that the packing replacement process depends on auxiliary tools and is inconvenient to operate in the related art. In order to solve the technical problems, the technical scheme provided by the invention is as follows: The wellhead polish rod sealing device provided by the invention comprises: The packing ejection mechanism comprises a packing box and a packing ejector rod, wherein the packing ejector rod is sleeved on the polish rod, and the packing box is sleeved on the packing ejector rod and is in threaded connection with the packing ejector rod. The packing box, the packing ejector rod and the polish rod enclose an annular accommodating cavity for accommodating packing. The rotation of the packing box around the packing ejector rod is used for changing the length of the annular accommodating cavity. Specifically, the packaging machine also comprises a second packaging mechanism, wherein the second packaging mechanism comprises a packaging box, a packaging ejector rod and a rubber core. The seal isolating ejector rod is sleeved on the polish rod, and the seal isolating box is sleeved on the seal isolating ejector rod and is in threaded connection with the seal isolating ejector rod. The seal box, the seal ejector rod and the polish rod enclose a seal cavity, and the rubber core is arranged in the seal cavity. The seal box can change the size of the seal cavity by rotating around the seal ejector rod so that the rubber core is extruded and tightly held by the polish rod. Specifically, the device also comprises a sliding disc deviation adjusting mechanism, wherein the sliding disc deviation adjusting mechanism comprises a clamp body, a sliding disc and a sliding disc adjusting screw. The clamp body is sleeved on the polish rod. The sliding disc is arranged on the clamp body and sleeved on the polish rod. The packing ejector rod is connected with one end, far away from the sealing ejector rod, of the sealing box, and the sealing ejector rod is connected with one end, far away from the clamp body, of the sliding disc. The plurality of slide plate adjusting screws are uniformly distributed around the axis of the clamp body and respectively abutted to the periphery of the slide plate, and are used for adjusting the radial positions of the slide plate and the polish rod. Specifically, the packing ejection mechanism further comprises a gland, wherein the gland is in threaded connection with one end, far away from the packing ejector rod, of the packing box and sleeved on the polish rod, and the gland is used for sealing the annular accommodating cavity and applying pressure to the packing stacked in the annular accommodating cavity so that the packing is tightly attached to the polish rod. Specifically, the gland, the packing ejector rod and the sealing box are all provided with a wear-resistant shaft sleeve on the joint surface of the gland, the packing ejector rod and the sealing box and the polish rod. Specifically, the packing ejection mechanism further comprises a packing box jackscrew, and the packing box is fixed to the packing ejector rod through the packing box jackscrew. Specifically, the second seal isolating mechanism further comprises a seal isolating box jackscrew, and the seal isolating box is fixed on the seal isolating ejector rod through the seal isolating box jackscrew. Specifically, the sliding plate deviation adjusting mechanism further comprises a plug and a plug jackscrew. The plug is in threaded connection with the clamp body and is abutted against the sliding disc, the plug rotates around the clamp body and is used for applying thrust to the sliding disc to enable the sliding disc to be abutted against the clamp body, and a plurality of plug jackscrews are uniformly distributed around the