A composite submersible oil protector

Abstract

The utility model discloses a composite submersible oil protector, comprising a main shaft with a hollow structure, an upper joint fixed on the left side of the main shaft, a lower joint fixed on the right side of the main shaft, a shell fixed on the outer side between the upper joint and the lower joint, a mechanical seal arranged between the upper joint and the main shaft, a support tube fixed on the right side of the upper joint, an upper base of a capsule fixed on the right end of the support tube, a lower base of the capsule fixed on the left side of the lower joint, a sedimentation tube fixed between the lower base of the capsule and the upper base of the capsule close to the main shaft side, a capsule fixed between the lower base of the capsule and the upper base of the capsule close to the shell side, a connecting opening is implemented at the axial left end of the sedimentation tube to form a sedimentation hole, a sedimentation cavity is formed between the sedimentation tube and the capsule, the sedimentation cavity is connected with the main shaft through the sedimentation hole, rubber sealing rings are arranged at the connection between the mechanical seal, the upper joint, the support tube, the sedimentation tube, the lower base of the capsule and the lower joint, and a capsule sealing device is arranged between the capsule and the upper base of the capsule and the lower base of the capsule.

Description

Technical Field

[0001] The utility model relates to the technical field of composite submersible oil protectors, in particular to a composite submersible oil protector. Background Art

[0002] As a core component in the oil field production system, the submersible motor protector plays a decisive role in ensuring the normal operation of the submersible motor. However, most of the submersible motor protectors on the market currently have problems such as a single structure and limited functions. For example, Y's Chinese patent discloses a submersible motor protector that can combine the traditional sedimentation type and capsule type submersible motor protectors for application, but the composite protector only achieves comprehensive protection through modular connection. However, the problem that follows is that the composite submersible motor protector adopts a "building block" connection method, which greatly increases the length of the protector, thereby increasing the production cost. The above limitations not only make the equipment appear to be inadequate when facing the complex and changeable oil field environment, but also restrict the further development and innovation of submersible motor technology to a large extent. At the same time, with the adjustment of the global energy structure and the continuous innovation of oil field mining technology, the performance requirements for submersible motor protectors are becoming increasingly stringent. When using, not only do we expect the protector to provide stable and reliable protection functions, but we also hope that it can have the characteristics of intelligence and modularity to adapt to different operating conditions and respond to various emergencies. However, the submersible motor protectors on the current market often find it difficult to meet these requirements, which not only affects the product satisfaction, but also limits the competitiveness of submersible motors in the high-end market. Therefore, from the perspective of market demand and technological development, design innovation and technological upgrading of submersible motor protectors are imperative. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a composite submersible oil protector, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite submersible protector, comprising a main shaft with a hollow structure, an upper joint is fixed on the left side of the main shaft, a lower joint is fixed on the right side of the main shaft, an outer shell is fixed on the outside between the upper joint and the lower joint, a mechanical seal is arranged between the upper joint and the main shaft, a support tube is fixed on the right side of the upper joint, an upper base of a capsule is fixed on the right end of the support tube, a lower base of the capsule is fixed on the left side of the lower joint, a sedimentation tube is fixed between the lower base of the capsule and the upper base of the capsule close to the main shaft side, a capsule is fixed between the lower base of the capsule and the upper base of the capsule close to the outer shell side, a connecting opening is implemented at the axial left end of the sedimentation tube to form a sedimentation hole, a sedimentation cavity is formed between the sedimentation tube and the capsule, and the sedimentation cavity is connected with the main shaft through the sedimentation hole.

[0005] Furthermore, the capsule is located inside the shell, and the capsule does not contact the inner surface of the shell.

[0006] Furthermore, rubber sealing rings are provided at the connections between the mechanical seal, the upper joint, the support tube, the sedimentation tube, the capsule lower base, and the lower joint.

[0007] Furthermore, a capsule sealing device is provided between the capsule and the capsule upper base and the capsule lower base.

[0008] Compared with the prior art, the beneficial effects of the utility model are: the composite submersible oil protector has the following advantages: this type of new composite submersible oil protector has the functional characteristics of both a capsule-type protector and a sedimentation-type protector, and during the operation of the composite submersible oil protector, when one protector unit fails, the second protector unit can continue to work, with high reliability and a wide range of applications. The presence of multiple sets of sealing devices effectively prevents oil leakage and can prevent external contaminants from entering the inside of the protector, thereby reducing the risk of contamination and damage to the protector. At the same time, the composite submersible oil protector is converted into a nested combination compared to the previous "building block" unit connection, which greatly shortens the length of the protector and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model.

[0010] In the figure: 1 mechanical seal, 2 upper joint, 3 support tube, 4 capsule upper base, 5 sedimentation tube, 6 main shaft, 7 capsule lower base, 8 lower joint, 9 sedimentation hole, 10 housing, 11 capsule. DETAILED DESCRIPTION

[0011] 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.

[0012] See also Figure 1The utility model provides a technical solution: a composite submersible protector, including a main shaft 6 with a hollow structure, an upper joint 2 is fixed on the left side of the main shaft 6, and a lower joint 8 is fixed on the right side of the main shaft 6. These joints not only play the role of mechanical connection, but also contain electrical connection components to ensure that the motor can transmit power to the pump. An outer shell 10 is fixed between the upper joint 2 and the lower joint 8. A mechanical seal 1 is arranged between the upper joint 2 and the main shaft 6. The mechanical seal can prevent oil from leaking from the inside of the protector to the outside, and can also prevent external pollutants from entering the inside of the protector. A support tube 3 is fixed on the right side of the upper joint 2, and a capsule upper base 4 is fixed on the right end of the support tube 3. A capsule lower base 7 is fixed on the left side of the lower joint 8, and a fixed settlement between the capsule lower base 7 and the capsule upper base 4 is close to the main shaft 6 side. Tube 5, capsule 11 is fixed between capsule lower base 7 and capsule upper base 4 close to the shell 10 side, and capsule 11 does not contact the surface of the inner side of the shell 10, and capsule 11 does not contact the surface of the shell 10, a connecting opening is implemented at the axial left end of the sedimentation tube 5 to form a sedimentation hole 9, a sedimentation cavity is formed between the sedimentation tube 5 and the capsule 11, and the sedimentation cavity is connected to the main shaft 6 through the sedimentation hole 9, rubber sealing rings are provided at the connections between the mechanical seal 1, the upper joint 2, the support tube 3, the sedimentation tube 5, the capsule lower base 7, and the lower joint 8, a capsule sealing device is provided between the capsule 11 and the capsule upper base 4 and the capsule lower base 7, and multiple sealing devices greatly improve the sealing performance and reliability of the equipment.

[0013] When in use: the upper connector 2 of the composite submersible protector is connected to the stator part of the submersible motor, and the lower connector 8 is connected to the rotor part of the submersible motor. When the temperature inside the equipment rises due to the movement of the motor, thereby increasing the pressure, the capsule 11 forms an elastic isolation layer between the motor oil and the well fluid. Therefore, even if the motor oil expands and contracts due to heat, the well fluid will not enter the motor cavity. At the same time, when the sediment and debris generated during the sedimentation of the oil enter the protector through the sedimentation tube 5, the gas or liquid inside the capsule 11 will be compressed, thereby generating a high pressure difference, which prevents the sediment and debris from entering the equipment through the capsule 11.

[0014] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A composite submersible oil protector, comprising a main shaft (6) of a hollow structure, characterized in that: An upper joint (2) is fixed on the left side of the main shaft (6), and a lower joint (8) is fixed on the right side of the main shaft (6). An outer shell (10) is fixed outside the upper joint (2) and the lower joint (8). A mechanical seal (1) is provided between the upper joint (2) and the main shaft (6). A support tube (3) is fixed on the right side of the upper joint (2). A capsule upper base (4) is fixed at the right end of the support tube (3). A capsule lower base (7) is fixed on the left side of the lower joint (8). A sedimentation tube (5) is fixed between the capsule lower base (7) and the capsule upper base (4) near the main shaft (6). A capsule (11) is fixed between the capsule lower base (7) and the capsule upper base (4) near the shell (10). A communicating opening is implemented at the axial left end of the sedimentation tube (5) to form a sedimentation hole (9). A sedimentation cavity is formed between the sedimentation tube (5) and the capsule (11). The sedimentation cavity is connected to the main shaft (6) through the sedimentation hole (9).

2. A composite submersible oil protector according to claim 1, characterized in that: The capsule (11) is located inside the shell (10), and the capsule (11) does not contact the surface inside the shell (10).

3. A composite submersible oil protector according to claim 1, characterized in that: Rubber sealing rings are provided at the connections between the mechanical seal (1), the upper joint (2), the support tube (3), the sedimentation tube (5), the capsule lower base (7), and the lower joint (8).

4. A composite submersible oil protector according to claim 1, characterized in that: A capsule sealing device is provided between the capsule (11) and the capsule upper base (4) and the capsule lower base (7).

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