CN-224228652-U - Gas leakage collecting device for sucker rod

Abstract

The utility model relates to a gas leakage collecting device for a sucker rod, which comprises a two-section device shell consisting of a left shell and a right shell, wherein opposite ends of the left shell and the right shell are mutually communicated, air outlet joints and background gas inlets are respectively formed on opposite sides of the left shell and the right shell, an opening longitudinally penetrating through the left shell or the right shell is formed on the left shell or the right shell, and the opening is movably penetrated by the sucker rod. This a two segmentation device shell for sucker rod gas leakage collection device sets up's capacity is fixed to have the sealed collection ability of leaking gas, this a gas leakage collection device for sucker rod is used as the on-the-spot test and is used, can guarantee the collection of target survey gas and background gas, and can make two parts gas intensive mixing ground input check out test set after collecting, the effectual ground detection precision of having solved is low, the problem that the danger is high.

Inventors

• CAI DAHAI
• LIU CHAO
• SONG TAOTAO
• WANG XINGHUA
• NI FENGPING
• ZHANG QI
• WU YONGHUA

Assignees

• 成都神州安信科技有限公司

Dates

Publication Date

20260512

Application Date

20250520

Claims (7)

1. 1. The utility model provides a be used for sucker rod gas leakage collection device, its characterized in that includes two segmentation device shell (2) that comprise left side shell and right side shell, the opposite ends of left side shell and right side shell communicate each other, the opposite sides of left side shell and right side shell are formed with gas outlet joint (1) and background gas import (5) respectively, be formed with on left side shell or the right side shell and vertically run through trompil (3) in left side shell or the right side outside to trompil (3) are passed by sucker rod (10) activity.
2. 2. A gas leakage collecting device for sucker rods according to claim 1, wherein the background gas inlet (5) is externally connected with a hose, and the background gas (7) is input into the two-stage device housing (2) through the externally connected hose.
3. 3. A gas leakage collecting device for a sucker rod according to claim 2, wherein a gap is formed between the opening (3) and the sucker rod (10), and leakage gas (6) leaked from the packing of the sucker rod is input into the two-stage device housing (2) through the gap between the opening (3) and the sucker rod (10).
4. 4. A gas leakage collecting device for sucker rod according to claim 3, wherein the inner cavity of the two-stage device housing (2) forms a gas mixing zone (8) where the leakage gas (6) and the background gas (7) are mixed.
5. 5. A gas leakage collecting device for a sucker rod as claimed in claim 4, wherein the gas outlet joint (1) is externally connected with a gas detection device, and the gas outlet joint (1) outputs a mixed gas (9) to the gas detection device.
6. 6. The gas leakage collecting device for the sucker rod according to any one of claims 1 to 5, wherein a connecting joint (4) is formed at the connecting position of the left side shell and the right side shell, and the connecting joint (4) is wound and sealed by adopting an aluminum foil tape.
7. 7. A gas leakage collecting device for sucker rod according to claim 6, wherein the two-stage device housing (2) is provided as a polyethylene terephthalate plastic housing.

Description

Gas leakage collecting device for sucker rod Technical Field The utility model relates to the technical field of oil field pumping unit gas leakage detection, in particular to a gas leakage collecting device for a pumping rod. Background The wellhead seal of the oil pumping unit mainly comprises a cross shell, a bottom base, a lower joint, a seal gate valve, a seal pressing pin, a seal pressing cap, a rubber packing and the like. In the crude oil production process, the packing sealing ring is worn and disabled due to corrosion of the polished rod, eccentric wear of the polished rod and the like, and oil, gas and water can overflow and leak. The main components of the leaked gas are natural gas, nitrogen, carbon dioxide, hydrogen sulfide and other gases, and after leakage, the hidden danger is possibly generated. The wellhead gas leakage detection method mainly comprises the following steps of ‌, namely a water detection method ‌, which is a simple and original method and is suitable for detecting a low-pressure gas system, wherein a detected workpiece is filled with gas at a pressure greater than atmospheric pressure and then placed in water, so that whether bubbles emerge from the workpiece or not is observed. The bubbling position is a leakage position, the method has low cost and limited sensitivity, and is not suitable for a high-pressure or vacuum system, and the pressure attenuation method ‌ is to charge a detected workpiece with gas at a certain pressure, seal the workpiece for a period of time and then observe the change of a pressure gauge to judge whether leakage exists, and if the leakage exists, the gas pressure can be gradually reduced. The method is suitable for detecting larger leakage points, but can not accurately position the leakage position, has low sensitivity to tiny leakage ‌, is characterized in that the pressure monitoring method ‌ is used for monitoring pressure change at wellhead production tree points, analyzing data by utilizing a statistical method to judge whether leakage exists, when the leakage occurs in a pipeline, the pressure at the leakage points suddenly drops, expanding waves propagated along the pipeline are generated, the pressure change ‌ at each point along the pipeline is caused, the unmanned aerial vehicle is used for inspecting ‌, equipment such as a high-definition camera and a thermal infrared imager is combined, the unmanned aerial vehicle can inspect and position the gas pipeline in the air, the leakage points can be found and positioned in time, the method is high in efficiency and wide in coverage range, but limited by weather and flight conditions ‌, and the handheld instrument detection method is used for manually detecting the wellhead production tree by utilizing a handheld gas concentration detection instrument (infrared principle or principle), and can display specific concentration values if the concentration exceeds normal environment concentration, and can generate acousto-optic alarm warning information. The method comprises the steps of 1, generally, simply detecting that gas leakage occurs, but not determining the leakage amount, 2, because a wellhead pumping unit sucker rod interface is of a dynamic sealing structure and is always in a relative motion state, the shape is irregular and inconvenient to seal and test, 3, the internal pressure of a sucker rod pipeline packing is between 0 and 1MPa, leaked gas expands in a short time, the pressure fluctuation and the leakage amount fluctuate in a sucker rod reciprocating period, the measurement result generally deviates greatly, the measured concentration and flow data result fluctuates when a common gas detection instrument is used for testing, and the detection is inaccurate, 4, the common method adopted for measuring the leakage amount is a bag method, firstly, the bag method is formed by wrapping bags, but the volume of the bags cannot be kept constant each time, the measurement result is influenced, secondly, the gas cannot be fully mixed, the air inlet at the far end and the near end cannot be fully mixed, the volume is irregular, and the measurement result is greatly influenced. Disclosure of utility model (One) solving the technical problems The utility model provides a gas leakage collecting device for a sucker rod, which solves the problems in the background technology. (II) technical scheme In order to achieve the purpose, the utility model provides the technical scheme that the gas leakage collecting device for the sucker rod comprises a two-section device shell which consists of a left shell and a right shell, wherein opposite ends of the left shell and the right shell are communicated with each other, an air outlet joint and a background gas inlet are respectively formed on opposite sides of the left shell and the right shell, an opening longitudinally penetrating through the left shell or the right shell is formed on the left shell or the right shell, and the opening is movably pene