Pump barrel of tubular oil well pump with two-stage sealed end part

Abstract

The utility model discloses a pump cylinder of a tubular oil well pump with two-stage sealing ends, and relates to the technical field of oil well pump equipment. The pump cylinder of the tubular oil well pump with the two-stage sealed ends comprises a pump cylinder body and a lengthened protective pump cylinder coupling, the lengthened protective pump cylinder coupling is provided with a lengthened sealing section, and the lengthened protective pump cylinder coupling is provided with a sealing piece; locking sealant is smeared at the joint of the lengthened protective pump cylinder coupling and the pump cylinder screw thread and in a gap cavity, two-stage sealing is achieved after assembly and screwing, that is, end face locking sealing and sealing piece soft sealing are achieved at the end of the pump cylinder, the lengthened protective pump cylinder coupling is connected with the pump cylinder screw thread, and the lengthened protective pump cylinder coupling is connected with the pump cylinder screw thread. The oil well pump effectively solves the problem of leakage caused by piercing leakage at the end of the oil well pump and piercing leakage failure caused by eccentric wear of the end of the pump head, and under the working conditions of piercing leakage at the end of the oil well pump and piercing leakage failure caused by eccentric wear of the end of the pump head, the secondary soft seal can still be sealed for a long time so as to ensure normal work of the oil well pump.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well pump equipment, in particular to an end double-stage sealed tube type oil well pump barrel. Background Art

[0002] The oil well pump is a main equipment used for mechanical oil extraction in oil fields. It is usually composed of a pump barrel, a plunger, a fixed valve and some accessories. Its power comes from the sucker rod, which transmits power to achieve up and down reciprocating motion to lift and extract crude oil from the wellbore. The pump barrel shell of the oil well pump must withstand the alternating pressure and corrosion wear brought by the well fluid, especially the upper end of the pump barrel of the oil well pump, which not only withstands the above pressure and corrosion, but also produces contact wear with the plunger connecting rod that is easily deflected by pressure, and often fails to puncture and seal due to wear and corrosion in a short period of time.

[0003] Especially after the widespread use of anti-corrosion oil pipes and anti-corrosion sucker rods, the problems of oil pumps in the oil pumping system are particularly prominent. There are two main problems: one is the corrosion and perforation of the pump barrel. The pinhole defects of the anti-corrosion treatment process on the inner wall of the pump barrel are inherent and difficult to avoid, and the resulting pump barrel corrosion and perforation are inherent and inevitable; the second is the eccentric wear and leakage of the upper pump head. The downward pressure deflection of the sucker rod column causes the plunger connecting rod and the inner wall of the upper pump head to bear eccentric pressure, which causes the pump head to wear and leak. It is difficult to avoid. Therefore, we proposed an end-end double-stage sealed tube oil pump barrel to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a double-stage sealed end tube type oil pump barrel, which solves the problems of puncture leakage on the end face of the pump barrel and puncture leakage on the end of the pump head due to eccentric wear.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: an end double-stage sealed tubular oil pump barrel, comprising a pump barrel and an extended protective pump barrel coupling, the extended protective pump barrel coupling is provided with an extended sealing section, the extended protective pump barrel coupling is processed with a standard thread and a soft sealing rubber ring groove, the inner cavity of the soft sealing rubber ring groove is provided with a sealing member;

[0006] The extended protective pump barrel coupling and the pump barrel threaded connection are coated with locking sealant, and a double-stage seal is achieved after assembly and tightening, that is, the end face locking seal and the sealing member soft seal are achieved at the end of the pump barrel.

[0007] Preferably, the extended protective pump barrel coupling is threadedly connected to the pump barrel.

[0008] Preferably, more than one soft sealing rubber ring groove is arranged at intervals, a sealing member is installed in each soft sealing rubber ring groove, and the two sealing members are distributed in a concentric circle manner.

[0009] Preferably, the sealing element is an "O"-shaped oil-resistant and high-temperature-resistant rubber ring.

[0010] Beneficial Effects

[0011] The utility model provides a double-stage sealed end tube type oil pump barrel. Compared with the prior art, it has the following beneficial effects:

[0012] The end double-stage sealed tubular oil pump barrel is assembled through a double-stage sealed pump barrel, and the pump barrel threads are coated with locking sealant and assembled with a protective coupling torque that meets the standard, so that the pump barrel can achieve a primary seal on the end face by thread locking, and at the same time, the pump barrel thread locking relies on two "O"-shaped oil-resistant and high-temperature resistant rubber rings to form a secondary protective seal, and the overall sealing performance meets the oil pump strength test standard, thereby effectively solving the leakage problem caused by puncture leakage at the end of the oil pump and puncture failure due to eccentric wear damage at the end of the pump head. Under the working conditions of end face puncture leakage and eccentric wear damage at the end of the pump head and puncture failure of the seal, the secondary soft seal can still achieve long-term sealing to ensure the normal operation of the oil pump, extend the service life of the oil pump, reduce maintenance and well repair costs and production losses, and improve the economic benefits of oil field development. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the pump barrel structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the protective coupling of the utility model.

[0016] In the figure: 1. Pump barrel; 2. Extended protective pump barrel coupling; 3. Seal. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 The utility model provides a technical solution: an end double-stage sealed tubular oil pump barrel, comprising a pump barrel 1 and an extended protective pump barrel coupling 2, wherein the extended protective pump barrel coupling 2 is provided with an extended sealing section, and the extended protective pump barrel coupling 2 is processed with a standard thread and a soft sealing rubber ring groove, and a sealing member 3 is provided in the inner cavity of the soft sealing rubber ring groove;

[0019] The threaded connection between the extended protective pump barrel coupling 2 and the pump barrel 1 is smeared with locking sealant, and a double-stage seal is achieved after assembly and tightening, that is, the end of the pump barrel 1 realizes the end face locking seal and the soft seal of the seal 3; the inner wall of the extended protective pump barrel coupling 2 is threadedly connected to the outer wall of the pump barrel 1, and more than one soft sealing rubber ring groove is arranged at intervals, and a seal is installed in each soft sealing rubber ring groove, and the two seals 3 are distributed in a concentric circle manner, and the seal 3 is an "O" type oil-resistant and high-temperature resistant rubber ring;

[0020] Through the double-stage sealing pump barrel assembly, and the pump barrel 1 thread is coated with locking sealant and assembled with the extended protective pump barrel coupling 2 with the torque reaching the standard, the pump barrel 1 can achieve the primary sealing of the end face by thread locking, and at the same time, the pump barrel 1 thread locking relies on two "O"-shaped oil-resistant and high-temperature resistant rubber rings to form a secondary protective seal. The overall sealing performance reaches the strength test standard of the oil pump, thus effectively solving the leakage problem caused by puncture leakage at the end of the oil pump and puncture failure due to eccentric wear damage at the end of the oil pump. Under the working conditions of end puncture leakage and eccentric wear damage and puncture failure of the pump head end, the secondary soft seal can still achieve long-term sealing to ensure the normal operation of the oil pump, extend the service life of the oil pump, reduce maintenance and well repair costs and production losses, and improve the economic benefits of oil field development.

[0021] During operation, the double-stage sealing pump barrel is assembled, and the pump barrel 1 thread is coated with locking sealant and assembled with the extended protective pump barrel coupling 2 with the torque reaching the standard, so that the pump barrel 1 can achieve the primary sealing of the end face by thread locking, and at the same time, the pump barrel 1 thread locking relies on two "O"-shaped oil-resistant and high-temperature resistant rubber rings to form a secondary protective seal, and the overall sealing performance reaches the strength test standard of the oil pump, thereby effectively solving the leakage problem caused by puncture leakage at the end of the oil pump and puncture leakage failure due to eccentric wear damage at the end of the pump head. Under the working condition of eccentric wear damage, puncture leakage and seal failure, the secondary soft seal can still achieve long-term sealing to ensure the normal operation of the oil pump, extend the service life of the oil pump, reduce maintenance and well repair costs and production losses, and improve the economic benefits of oil field development.

[0022] In summary, the device effectively solves the leakage problem caused by puncture leakage at the end of the oil pump and puncture leakage failure due to eccentric wear and damage at the end of the pump head. Under the working conditions of puncture leakage at the end of the oil pump and eccentric wear and damage at the end of the pump head, the secondary soft seal can still provide long-term sealing to ensure the normal operation of the oil pump.

[0023] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A double-stage sealed end tube type oil well pump barrel, characterized in that: The invention comprises a pump barrel (1) and an extended protective pump barrel coupling (2), wherein the extended protective pump barrel coupling (2) is provided with an extended sealing section, and the extended protective pump barrel coupling (2) is processed with a standard thread and a soft sealing rubber ring groove, and the inner cavity of the soft sealing rubber ring groove is provided with a sealing member (3); The threaded connection between the extended protective pump barrel coupling (2) and the pump barrel (1) is coated with locking sealant, and after assembly and tightening, a double-stage seal is achieved, that is, the end of the pump barrel (1) achieves an end face locking seal and a soft seal of the seal (3).

2. The double-stage sealed end tube oil pump barrel according to claim 1, characterized in that: The extended protective pump barrel coupling (2) is threadedly connected to the pump barrel (1).

3. The double-stage sealed end tube oil pump barrel according to claim 1, characterized in that: More than one soft sealing rubber ring groove is arranged at intervals, and a sealing member is installed in each soft sealing rubber ring groove, and the two sealing members (3) are distributed in a concentric circle manner.

4. The double-stage sealed end tube oil pump barrel according to claim 1, characterized in that: The sealing element (3) is an "O"-shaped oil-resistant and high-temperature-resistant rubber ring.

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