Search

CN-224216105-U - Petroleum wellhead instrument heat-insulation protective cover

CN224216105UCN 224216105 UCN224216105 UCN 224216105UCN-224216105-U

Abstract

The utility model relates to the technical field of instrument protection, in particular to a thermal insulation protective cover for an instrument at a petroleum wellhead. The heat-insulating protective cover for the petroleum wellhead instrument comprises a protective box, a box door connected in a rotating mode is arranged on the front box face of the protective box, a wire inlet hole is formed in the side wall of the protective box, and a sealing component is arranged in the wire inlet hole. Compared with the traditional sealing cement or the explosion-proof sealing joint for sealing the inlet hole formed in the side wall of the protective box, the oil wellhead instrument heat-insulation protective cover provided by the utility model has the advantages that the annular elastic liquid bag is of an elastic structure, the expanded annular elastic liquid bag can rapidly fill gaps between the pressure guiding pipe and the threading pipe and realize the sealing of the gaps, the effective cold air outside the protective box enters the protective box through the gaps, and the annular elastic liquid bag of the elastic structure not only eliminates the problem of sealing failure of the annular elastic liquid bag caused by vibration of the pressure guiding pipe or the protective box, but also can adapt to the pressure guiding pipes with different diameters.

Inventors

  • LONG SHIHENG
  • SONG CHUNBIAO

Assignees

  • 新疆博瑞设备技术有限公司

Dates

Publication Date
20260508
Application Date
20250912

Claims (8)

  1. 1. The utility model provides a petroleum wellhead instrument heat preservation protection casing, includes protective housing (1), chamber door (11) that rotate the connection are installed to the preceding case face of protective housing (1), just inlet wire hole (1 a) that are used for penetrating the guide pressure pipe are seted up to the lateral wall of protective housing (1), its characterized in that: The sealing component (2) is arranged in the wire inlet hole (1 a), the sealing component (2) comprises a wire through pipe (21), the wire through pipe (21) is fixedly arranged in the wire inlet hole (1 a), an inner annular groove (21 a) is formed in the inner pipe wall of the wire through pipe (21), an annular elastic liquid bag (22) is embedded in the inner annular groove (21 a), an annular liquid storage cavity (21 b) is formed in a pipe body of the wire through pipe (21) positioned in the protective box (1), the annular liquid storage cavity (21 b) is mutually communicated with the annular elastic liquid bag (22) through a plurality of butt joint pipes (25) distributed in an annular mode, and an annular piston column (23) in sliding connection is arranged in the annular liquid storage cavity (21 b); The annular liquid storage cavity (21 b) and the annular elastic liquid bag (22) are internally respectively stored with water-based solution, and the annular elastic liquid bag (22) is internally provided with an electric heating wire (6).
  2. 2. The thermal insulation shield for petroleum wellhead instruments according to claim 1, wherein the sealing component (2) further comprises a ring-shaped rotating cover (24), the cross section of the ring-shaped rotating cover (24) is of an L-shaped structure, a rotating ring (241) in rotating connection is installed on the inner cover surface of the ring-shaped rotating cover (24), a plurality of middle connecting rods (242) in annular distribution are fixedly installed on the rotating ring (241), and the other ends of the middle connecting rods (242) are inserted into the annular liquid storage cavity (21 b) and fixedly connected with the cylindrical surface of the annular piston column (23) deviating from the annular elastic liquid bag (22).
  3. 3. The thermal insulation protection cover for the petroleum wellhead instrument according to claim 2, wherein an internal thread part (243) is arranged in the annular rotary cover (24), and an external thread part (211) matched with the internal thread part (243) is arranged on the outer pipe wall of the threading pipe (21) positioned in the protection box (1).
  4. 4. The thermal insulation shield of petroleum wellhead instrument according to claim 1, wherein the outer wall of the annular elastic liquid bag (22) is fixedly connected with the inner wall of the inner annular groove (21 a).
  5. 5. The thermal insulation protection cover for the petroleum wellhead instrument according to claim 1, wherein an insulation layer (4) is fixedly embedded in the inner wall of the protection box (1), and heat tracing bands (5) distributed in an S shape are laid on the insulation layer (4).
  6. 6. The thermal insulation shield for petroleum wellhead meters according to claim 5, wherein the pipe body of the threading pipe (21) fitted with the annular elastic fluid bladder (22) is located in the box plate of the protective box (1).
  7. 7. The thermal insulation protection cover for the petroleum wellhead instrument according to claim 5, wherein a control panel (3) is installed on the inner wall of the protection box (1), a temperature sensor is installed on the control panel (3), and the control panel (3) is electrically connected with a heat tracing belt (5) and an electric heating wire (6) through wires.
  8. 8. The thermal insulation protection cover for the petroleum wellhead instrument, as claimed in claim 1, is characterized in that a mounting bracket (12) for mounting the instrument is arranged in the protection box (1).

Description

Petroleum wellhead instrument heat-insulation protective cover Technical Field The utility model relates to the technical field of instrument protection, in particular to a thermal insulation protective cover for an instrument at a petroleum wellhead. Background In petroleum exploitation operation, wellhead meters (such as pressure gauges, flow meters and the like) are core devices for monitoring key production parameters such as wellhead pressure, flow and the like, and the measurement precision and stable operation of the wellhead meters directly determine the safety and efficiency of the exploitation operation. However, the petroleum wellhead is in a complex field environment and is influenced by multiple adverse factors such as low temperature, dust, rain and snow, vibration and the like, in order to realize the connection of the pressure guiding pipe and the instrument, the side wall of the protective cover is required to be provided with a wire inlet hole, the prior art is mostly sealed by sealing cement or an explosion-proof sealing joint with fixed specification, the sealing cement has low cost, but is easy to age and crack after being exposed in the field environment for a long time, cold air is led to infiltrate into the protective cover from a gap, the temperature stability in the box is destroyed, the cement is difficult to detach after being solidified, the subsequent maintenance is required to be cleaned again and smeared, the operation is complicated, the sealing performance of the explosion-proof sealing joint is better, the specification is fixed, only the pressure guiding pipes with single diameters are required to be replaced according to the monitoring requirement, and the joint with corresponding specification is required to be replaced at the moment, and the equipment cost and the maintenance time are increased. Therefore, it is necessary to provide a new thermal insulation protection cover for petroleum wellhead instruments to solve the above technical problems. Disclosure of utility model In order to solve the technical problems, the utility model provides a heat-insulating protective cover for an instrument of a petroleum wellhead. The utility model provides a thermal insulation protective cover of an oil wellhead instrument, which comprises a protective box, wherein a box door in rotary connection is arranged on the front box surface of the protective box, and a wire inlet hole for penetrating a pressure guiding pipe is formed in the side wall of the protective box; The sealing component is arranged in the wire inlet hole and comprises a wire threading pipe, the wire threading pipe is fixedly arranged in the wire inlet hole, an inner annular groove is formed in the inner pipe wall of the wire threading pipe, an annular elastic liquid bag is embedded in the inner annular groove, an annular liquid storage cavity is formed in a pipe body of the wire threading pipe, which is positioned in the protective box, the annular liquid storage cavity is communicated with the annular elastic liquid bag through a plurality of annular distributed butt joint pipes, and an annular piston column in sliding connection is arranged in the annular liquid storage cavity; The annular liquid storage cavity and the annular elastic liquid bag are internally provided with water-based solution, and the annular elastic liquid bag is internally provided with an electric heating wire. Preferably, the sealing component further comprises a ring-shaped rotating cover, the cross section of the ring-shaped rotating cover is of an L-shaped structure, the inner cover surface of the ring-shaped rotating cover is provided with a rotating ring in rotating connection, a plurality of ring-shaped distributed middle connecting rods are fixedly arranged on the rotating ring, and the other ends of the middle connecting rods are inserted into the annular liquid storage cavity and are fixedly connected with the cylindrical surface of the annular piston column, which is away from the annular elastic liquid bag. Preferably, an internal thread part is arranged in the ring-shaped rotary cover, and an external thread part matched with the internal thread part is arranged on the outer pipe wall of the threading pipe in the protective box. Preferably, the outer wall of the annular elastic liquid bag is fixedly connected with the inner groove wall of the inner groove. Preferably, an insulation layer is fixedly embedded on the inner wall of the protective box, and heat tracing bands distributed in an S shape are laid on the insulation layer. Preferably, the pipe body of the threading pipe provided with the annular elastic liquid bag is positioned in a box plate of the protective box. Preferably, a control panel is mounted on the inner wall of the protective box, a temperature sensor is mounted on the control panel, and the control panel is electrically connected with the heat tracing belt and the electric heating wire through wires. Prefera