Refitting method and structure for upper joint assembly

A component structure and component technology, which is applied in earthwork drilling, mechanical equipment, construction, etc., can solve problems such as high surface roughness and coaxiality, difficulty in processing parts to meet design requirements, and high processing difficulty, so as to reduce Difficulty of processing, meeting the requirements of use, and improving the effect of pass rate

Inactive Publication Date: 2016-03-30
贵州航天凯山石油仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Due to the deep surface depth of the inner hole of the upper joint, the installation hole of the sealing plug is a small diameter long hole, the requirements for surface roughness and coaxiality are high, and the processing is very difficult Large, the processing quality of parts is difficult to meet the design requirements

Method used

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  • Refitting method and structure for upper joint assembly
  • Refitting method and structure for upper joint assembly
  • Refitting method and structure for upper joint assembly

Examples

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Effect test

Embodiment

[0022] This example is an improvement on existing technologies, such as Figure 4 shown by Figure 4 It can be seen that the temperature probe installation hole 3 and the sealing plug installation hole 4 are processed in the middle section of the existing joint 13 as a whole. Since these two holes are located deep, the requirements for surface roughness and coaxiality are high, and the processing is very difficult. The processing quality of parts is difficult to meet the design requirements. The pass rate in processing is low.

[0023] In order to reduce the processing difficulty of the parts, in this example, the existing overall joint 13 is split into such figure 2 The connector body shown in 1 and image 3 The shown plug 2; the plug 2 is processed with a mounting hole for installing the temperature probe 5 and the sealing plug 6, and the outer circle of the plug 2 is processed with an external thread and a sealing groove for connecting with the inner hole of the j...

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Abstract

The invention discloses a refitting method and structure for an upper joint assembly. The refitting method includes the steps that an existing whole upper joint is disassembled into a joint body and a plug; during installation, a temperature probe and a sealing stopper are installed on the plug, and then the plug together with the temperature probe and the sealing stopper are installed in the joint body; the plug and the joint body are connected in a sealed mode through a seal ring. The existing whole upper joint is disassembled into the joint body and the plug, the part structure is simplified, the part machining difficulty is lowered, machining cost is saved, and the qualified rate of part machining is increase. Frequently-used threaded connection is adopted for the plug and the joint body, the O-ring is used for sealing, assembly reliability is ensured, and the use requirement is met. While the installing structure is changed, the overall assembly size of the part is not changed, and the whole machine structural size is not affected.

Description

technical field [0001] The invention relates to a refitting method and structure of an upper joint assembly, and belongs to the technical field of equipment transformation of an upper joint assembly in an oil field downhole submersible electric pump tester. Background technique [0002] The electric submersible pump is an important mechanical oil production equipment for oilfield development, and it is one of the most widely used rodless pumps at home and abroad. Its function is to pump the downhole liquid to the surface without the need for a sucker rod string. It has the characteristics of large displacement, high head, simple surface technology, and convenient management. It has played an irreplaceable role in secondary oil recovery and tertiary oil recovery. role. [0003] In the submersible pump tester, the temperature probe and sealing plug are installed in the upper joint. The existing upper joint is integral. After the temperature probe and sealing plug are welded w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/008E21B17/02F04D15/00
Inventor 薛胜龙赵宗琦林涛陈加华王全福
Owner 贵州航天凯山石油仪器有限公司
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