CN105422083A - Sealing method of temperature sensor interface and sealing structure of temperature sensor interface - Google Patents
Sealing method of temperature sensor interface and sealing structure of temperature sensor interface Download PDFInfo
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- CN105422083A CN105422083A CN201510770512.0A CN201510770512A CN105422083A CN 105422083 A CN105422083 A CN 105422083A CN 201510770512 A CN201510770512 A CN 201510770512A CN 105422083 A CN105422083 A CN 105422083A
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- mineral oil
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Abstract
The invention discloses a sealing method of a temperature sensor interface and a sealing structure of the temperature sensor interface. The temperature sensing end of a temperature sensor extends out of a casing, so that the temperature sensing end of the temperature sensor is directly in contact with underground test media, in this way, the temperature sensing speed of an instrument is accelerated; and in order to prevent the underground test media from entering the casing through a connecting seam of the temperature sensor and the casing, a sealing ring and mineral oil duplex sealing combining structure is used in the method for improving the sealing reliability. The concrete method comprises the following steps that a section of cavity is formed outside the connecting seam of the temperature sensor and the casing through a liquid storage case sleeving the outside of a temperature sensing rod of the temperature sensor; and the cavity is filled with the mineral oil to form a mineral oil sealing section. The mineral oil is used for isolating the contact between gas well environment media and a sealing ring arranged on the temperature sensor; the sealing ring is prevented from aging too early; and the damage to circuits inside the instrument or the cause of potential safety hazards since natural gas enters the instrument through the sealing ring made of rubber materials can be prevented.
Description
Technical field
the present invention relates to a kind of encapsulating method and structure of temperature sensor interface, belong to the technical field of sealing technology of gas field underground equipment and instrument.
Background technology
when carrying out pressure test to gas field, the temperature while of needs under testing well, is therefore provided with temperature pick up on gas well pressure gauge.In order to ensure gas well pressure gauge not by the erosion of mine gas, whole gas well pressure gauge is sealing, therefore traditional way is generally temperature pick up is arranged on gas well pressure gauge inside, because temperature pick up directly can not contact with tested media, there is the problem of flowing pressure test temperature lag.
in order to can real time temperature be obtained, the probe segment of temperature pick up directly must contact with tested media, solve the problem at present and mainly contain two kinds of methods: one is by the thin box hat armouring of temperature pick up, be integrally welded on Instrument shell, prevent high-pressure natural gas from infiltrating instrument internal by weld seam.Two is be provided with rubber seal sealing ring on temperature pick up armouring box hat, prevents high-pressure natural gas from infiltrating instrument internal after being screwed into Instrument shell by sealing sealing ring.
said method exist in actual applications manufacturability difference, weld seam perishable, be not easy to the deficiency such as maintain and replace, long term seal poor reliability.
Summary of the invention
the object of the invention is to, a kind of encapsulating method and structure of temperature sensor interface is provided, prior art processes is poor, weld seam is perishable to solve, be not easy to maintain and replace, the technical problem such as long term seal poor reliability.
technical scheme of the present invention is achieved in that
the encapsulating method of a kind of temperature sensor interface of the present invention is, the temperature-sensitive end of temperature pick up stretches out outside housing by the method, the temperature-sensitive end making temperature pick up directly and downhole testing medium contact, to improve the temperature-sensitive speed of instrument; In order to prevent downhole testing medium from entering housing by the connection gap of temperature pick up and housing, the structure that the method adopts sealing ring and mineral oil double seal to combine, to improve the reliability of sealing; Concrete grammar is the storage liquid shell by being enclosed within outside temperature pick up temperature sensing rod, outside the connection gap of temperature pick up and housing, form one section of cavity, and in cavity, injects mineral oil form mineral oil seal section.
in preceding method, described mineral oil seal section seals by overlapping with the earial drainage of storage liquid shell top endoporus interference fit, and earial drainage cover endoporus is connected with the temperature sensing rod slipper seal of temperature pick up, to be convenient for changing temperature pick up.
in preceding method, temperature pick up is damaged by during heat expansion for preventing the mineral oil in cavity, spiral dredging flow groove is had at described earial drainage cover Excircle machining, by the capillarity of spiral dredging flow groove, both the mineral oil in cavity can have been made to be discharged by spiral dredging flow groove by during heat expansion, can prevent again mineral oil excessive leakage from causing loss.
hermetically-sealed construction according to of the present invention a kind of temperature sensor interface of said method formation is, this structure comprises temperature pick up and is located at the temperature-sensitive window of housing outer surface, and temperature-sensitive bottom of window is provided with temperature sensor interface; The temperature sensing rod of temperature pick up outwards passes temperature sensor interface by housing, and is connected with temperature sensor interface sealing thread; The temperature sensing rod overcoat being positioned at the temperature pick up of temperature-sensitive window has storage liquid shell, is threaded bottom storage liquid shell with temperature sensor interface; Be marked with mineral oil between storage liquid shell and the temperature sensing rod of temperature pick up, between storage liquid shell top and the temperature sensing rod of temperature pick up, be provided with earial drainage cover, seal between earial drainage cover endoporus and the temperature sensing rod of temperature pick up and be slidably connected.
in aforementioned structure, described temperature sensor interface is divided into two sections, is unthreaded hole near instrument internal one section, is screwed hole near outside one section of instrument; The unthreaded hole section corresponding position of temperature pick up and temperature sensor interface is provided with at least one seal groove, is provided with sealing ring in seal groove, and seal ring with outer is connected with the unthreaded hole section slipper seal of temperature sensor interface; The screwed hole section corresponding position of temperature pick up and temperature sensor interface is provided with external screw thread, and temperature pick up is threaded through in housing one section of the screwed hole of external screw thread and temperature sensor interface.
in aforementioned structure, be provided with external screw thread bottom described storage liquid shell, outside housing one section of the screwed hole of the external screw thread bottom storage liquid shell and temperature sensor interface is threaded; The binding face of storage liquid shell and temperature-sensitive bottom of window is provided with seal groove, and be provided with sealing ring in seal groove, sealing ring crimps with temperature-sensitive window sealing bottom surface.
in aforementioned structure, be provided with earial drainage cover in the hole at described storage liquid shell top, the endoporus of earial drainage cover is provided with seal groove, and be provided with sealing ring in seal groove, the inner circle of sealing ring is connected with the temperature sensing rod slipper seal of temperature pick up; The cylindrical of earial drainage cover is provided with spiral dredging flow groove, and the cylindrical of earial drainage cover is connected with the spot welding of storage liquid shell endoporus interference fit.
owing to have employed technique scheme, compared with prior art, in the present invention, the temperature-sensitive end of temperature pick up directly contacts with gas well surrounding medium, can realize quick temperature-sensitive, decrease temperature lag during flowing pressure test in the present invention.Adopt mineral oil to isolate the contact of the sealing ring on gas well surrounding medium and temperature pick up, sealing ring premature aging can be prevented, prevent natural gas from entering instrument internal through the sealing ring of quality of rubber materials, damage instrument internal circuit or cause potential safety hazard.When adopting spiral dredging flow groove both can ensure to assemble, mineral oil is full of storage liquid shell inner chamber, emptying air bubble, can, when temperature sharply changes, prevent mineral oil from expanding with heat and contract with cold again, damage temperature pick up.Spiral dredging flow groove produces siphonage, can prevent the loss of mineral oil excessive leakage.
Accompanying drawing explanation
fig. 1 is structural representation of the present invention.
being labeled as in accompanying drawing: 1-temperature pick up, 2-sealing ring, 3-housing, 4-store liquid shell, 5-mineral oil, 6-earial drainage cover, 7-temperature-sensitive window, 8-spiral dredging flow groove, 9-spot welding.
Detailed description of the invention
below in conjunction with drawings and Examples, the present invention is described in further detail, but not as any limitation of the invention.
the encapsulating method of a kind of temperature sensor interface of the present invention, as shown in Figure 1: the temperature-sensitive end of temperature pick up stretches out outside housing by the method, the temperature-sensitive end making temperature pick up directly and downhole testing medium contact, to improve the temperature-sensitive speed of instrument; In order to prevent downhole testing medium from entering housing by the connection gap of temperature pick up and housing, the structure that the method adopts sealing ring and mineral oil double seal to combine, to improve the reliability of sealing; Concrete grammar is the storage liquid shell by being enclosed within outside temperature pick up temperature sensing rod, outside the connection gap of temperature pick up and housing, form one section of cavity, and in cavity, injects mineral oil form mineral oil seal section.Mineral oil seal section seals by overlapping with the earial drainage of storage liquid shell top endoporus interference fit, and earial drainage cover endoporus is connected with the temperature sensing rod slipper seal of temperature pick up, to be convenient for changing temperature pick up.Temperature pick up is damaged by during heat expansion for preventing the mineral oil in cavity, spiral dredging flow groove is had at described earial drainage cover Excircle machining, by the capillarity of spiral dredging flow groove, both the mineral oil in cavity can have been made to be discharged by spiral dredging flow groove by during heat expansion, can prevent again mineral oil excessive leakage from causing loss.
according to the hermetically-sealed construction of of the present invention a kind of temperature sensor interface that said method is formed, as shown in Figure 1: this structure comprises temperature pick up 1 and is located at the temperature-sensitive window 7 of housing 3 external surface, and temperature-sensitive bottom of window is provided with temperature sensor interface; The temperature sensing rod of temperature pick up outwards passes temperature sensor interface by housing, and is connected with temperature sensor interface sealing thread; The temperature sensing rod overcoat being positioned at the temperature pick up of temperature-sensitive window has storage liquid shell 4, is threaded bottom storage liquid shell with temperature sensor interface; Be marked with mineral oil 5 between storage liquid shell and the temperature sensing rod of temperature pick up, be provided with earial drainage between storage liquid shell top and the temperature sensing rod of temperature pick up and overlap 6, seal between earial drainage cover endoporus and the temperature sensing rod of temperature pick up and be slidably connected.Temperature sensor interface is divided into two sections, is unthreaded hole near instrument internal one section, is screwed hole near outside one section of instrument; Temperature pick up 1 is provided with at least one seal groove with the unthreaded hole section corresponding position of temperature sensor interface, and be provided with sealing ring 2 in seal groove, seal ring with outer is connected with the unthreaded hole section slipper seal of temperature sensor interface; The screwed hole section corresponding position of temperature pick up and temperature sensor interface is provided with external screw thread, and temperature pick up is threaded through in housing one section of the screwed hole of external screw thread and temperature sensor interface.Be provided with external screw thread bottom storage liquid shell 4, outside housing one section of the screwed hole of the external screw thread bottom storage liquid shell and temperature sensor interface is threaded; The binding face store bottom liquid shell and temperature-sensitive window 7 is provided with seal groove, and be provided with sealing ring 2 in seal groove, sealing ring crimps with temperature-sensitive window sealing bottom surface.Be provided with earial drainage cover 6 in the hole at storage liquid shell 4 top, the endoporus of earial drainage cover 6 is provided with seal groove, and be provided with sealing ring 2 in seal groove, the inner circle of sealing ring is connected with the temperature sensing rod slipper seal of temperature pick up; The cylindrical of earial drainage cover is provided with spiral dredging flow groove 8, and the cylindrical of earial drainage cover 6 is connected with the spot welding of storage liquid shell endoporus interference fit.
Embodiment
this is such as shown in Fig. 1, during concrete enforcement, a temperature-sensitive window 7 can be processed at housing 3 external surface of downhole instrument, and processing is used for the interface of mounting temperature sensor 1 bottom temperature-sensitive window 7, screwed hole and unthreaded hole is processed with in the endoporus of interface, close housing 3 inner surface is one section of unthreaded hole, is one section of screwed hole near housing outer surface, is provided with temperature pick up 1 and storage liquid shell 4 in screwed hole.Earial drainage cover 6 is installed in the endoporus on storage liquid shell 4 top, earial drainage cover cylindrical is processed with spiral slot 8.Storage liquid shell 4 endoporus and earial drainage overlap between 6 cylindricals and adopt interference fit, end face circular seam place's spot welding 9, in case stopping leak stream cover comes off.When storage liquid shell 4 is installed, first sealing ring is arranged in the seal groove of storage liquid shell 4 bottom surface, then storage liquid shell 4 is screwed in the screwed hole of the temperature sensor interface housing from the temperature-sensitive window 7 of housing outer surface, tighten.And then the temperature pick up temperature-sensitive head that sealing ring is housed is passed from temperature sensor interface from the inside to the outside, push the temperature sensor interface on housing, when the first sealing ring on temperature pick up enters unthreaded hole, to overlap in 6 endoporus from earial drainage with dropper and slowly add higher boiling, full-bodied mineral oil 5, air bubble in emptying mineral oil, until overflow.And then continue to tighten temperature pick up, the spiral dredging flow groove 8 that unnecessary mineral oil and air bubble overlap between 6 from storage liquid shell 4 and earial drainage overflows.In this example, the temperature-sensitive end of temperature pick up 1 directly contacts with gas well surrounding medium, can realize quick temperature-sensitive, the problem of temperature lag when overcoming flowing pressure test.
owing to have employed technique scheme, temperature pick up air trap device of the present invention and method thereof have following characteristics:
1, temperature pick up temperature-sensitive end directly contacts with gas well surrounding medium, realizes quick temperature-sensitive, decreases temperature lag during flowing pressure test;
2, employing mineral oil has isolated the sealing ring on gas well surrounding medium and temperature pick up, can slow down the aging of sealing ring, and prevent natural gas from entering instrument internal through the sealing ring of quality of rubber materials, damages instrument internal circuit or causes potential safety hazard;
3, when spiral dredging flow groove both can ensure to assemble, mineral oil was full of storage liquid shell inner chamber, emptying air bubble, can, when temperature sharply changes, prevent mineral oil from expanding with heat and contract with cold again, damage temperature pick up.Spiral dredging flow groove has capillary or siphonage, can prevent the loss of mineral oil excessive leakage.
method of the present invention and structure are applicable at natural gas well tester, are particularly useful for needing the stream of quick temperature-sensitive to calm the anger well class pressure gauge.
Claims (7)
1. an encapsulating method for temperature sensor interface, is characterized in that: the temperature-sensitive end of temperature pick up stretches out outside housing by the method, the temperature-sensitive end making temperature pick up directly and downhole testing medium contact, to improve the temperature-sensitive speed of instrument; Housing is entered by the connection gap of temperature pick up and housing for preventing downhole testing medium, adopt the structure that sealing ring and mineral oil double seal combine, to improve the reliability of sealing, concrete grammar is the storage liquid shell by being enclosed within outside temperature pick up temperature sensing rod, outside the connection gap of temperature pick up and housing, form one section of cavity, and in cavity, inject mineral oil form mineral oil seal section.
2. the encapsulating method of temperature sensor interface according to claim 1, it is characterized in that: described mineral oil seal section seals by overlapping with the earial drainage of storage liquid shell top endoporus interference fit, earial drainage cover endoporus is connected with the temperature sensing rod slipper seal of temperature pick up, to be convenient for changing temperature pick up.
3. the encapsulating method of temperature sensor interface according to claim 2, it is characterized in that: damage temperature pick up for preventing the mineral oil in cavity by during heat expansion, spiral dredging flow groove is had at described earial drainage cover Excircle machining, by the capillarity of spiral dredging flow groove, both the mineral oil in cavity can have been made to be discharged by spiral dredging flow groove by during heat expansion, can prevent again mineral oil excessive leakage from causing loss.
4. the hermetically-sealed construction of the temperature sensor interface that method is formed according to the arbitrary claim of claim 1-3, comprise temperature pick up (1) and be located at the temperature-sensitive window (7) of housing (3) external surface, it is characterized in that: be provided with temperature sensor interface in temperature-sensitive window (7) bottom; The temperature sensing rod of temperature pick up (1) outwards passes temperature sensor interface by housing, and is connected with temperature sensor interface sealing thread; The temperature sensing rod overcoat being positioned at the temperature pick up (1) of temperature-sensitive window (7) has storage liquid shell (4), and storage liquid shell (4) bottom is threaded with temperature sensor interface; Mineral oil (5) is marked with between storage liquid shell (4) and the temperature sensing rod of temperature pick up (1), be provided with earial drainage cover (6) between storage liquid shell (4) top and the temperature sensing rod of temperature pick up (1), seal between the temperature sensing rod of earial drainage cover (6) endoporus and temperature pick up (1) and be slidably connected.
5. the hermetically-sealed construction of temperature sensor interface according to claim 4, is characterized in that: described temperature sensor interface is divided into two sections, be unthreaded hole near instrument internal one section, is screwed hole near one section, instrument outside; Temperature pick up (1) is provided with at least one seal groove with the unthreaded hole section corresponding position of temperature sensor interface, and be provided with sealing ring (2) in seal groove, sealing ring (2) cylindrical is connected with the unthreaded hole section slipper seal of temperature sensor interface; The screwed hole section corresponding position of temperature pick up (1) and temperature sensor interface is provided with external screw thread, and temperature pick up (1) is threaded through in housing one section of the screwed hole of external screw thread and temperature sensor interface.
6. the hermetically-sealed construction of temperature sensor interface according to claim 4, is characterized in that: described storage liquid shell (4) bottom is provided with external screw thread, and outside housing one section of the external screw thread of storage liquid shell (4) bottom and the screwed hole of temperature sensor interface is threaded; The binding face of storage liquid shell and temperature-sensitive window (7) bottom is provided with seal groove, and be provided with sealing ring (2) in seal groove, sealing ring (2) crimps with temperature-sensitive window (7) sealing bottom surface.
7. the hermetically-sealed construction of temperature sensor interface according to claim 4, it is characterized in that: in the hole at described storage liquid shell (4) top, be provided with earial drainage cover (6), the endoporus of earial drainage cover (6) is provided with seal groove, be provided with sealing ring (2) in seal groove, the inner circle of sealing ring (2) is connected with the temperature sensing rod slipper seal of temperature pick up (1); The cylindrical of earial drainage cover (6) is provided with spiral dredging flow groove (8), and the cylindrical of earial drainage cover (6) is connected with the spot welding of storage liquid shell endoporus interference fit.
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| CN201510770512.0A CN105422083B (en) | 2015-11-12 | 2015-11-12 | A kind of encapsulating method and structure of temperature sensor interface |
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| CN201510770512.0A CN105422083B (en) | 2015-11-12 | 2015-11-12 | A kind of encapsulating method and structure of temperature sensor interface |
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| CN105422083A true CN105422083A (en) | 2016-03-23 |
| CN105422083B CN105422083B (en) | 2018-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700814A (en) * | 2019-10-28 | 2020-01-17 | 贵州航天凯山石油仪器有限公司 | Method and device for improving sealing reliability of gas well pressure gauge |
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| US5232286A (en) * | 1991-04-10 | 1993-08-03 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Energy, Mines And Resources | Long lasting thermocouple for high temperature measurements of liquid metals, mattes and slags |
| CN2931784Y (en) * | 2006-05-17 | 2007-08-08 | 李白 | temperature sensor used for bergol logging device |
| CN201034750Y (en) * | 2007-04-30 | 2008-03-12 | 中国三江航天集团远方科技开发公司 | Novel down-hole temperature-sensing measurement mechanism |
| CN101706328A (en) * | 2009-11-02 | 2010-05-12 | 一重集团大连设计研究院有限公司 | Thermocouple lead sealing equipment |
| CN102031961A (en) * | 2009-09-30 | 2011-04-27 | 西安威尔罗根能源科技有限公司 | Borehole temperature measuring probe |
| CN201896612U (en) * | 2010-11-11 | 2011-07-13 | 中国海洋石油总公司 | Downhole temperature sensor |
| CN102564618A (en) * | 2012-01-16 | 2012-07-11 | 中国工程物理研究院化工材料研究所 | Temperature sensor and sealing and installation method thereof |
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2015
- 2015-11-12 CN CN201510770512.0A patent/CN105422083B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5232286A (en) * | 1991-04-10 | 1993-08-03 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Energy, Mines And Resources | Long lasting thermocouple for high temperature measurements of liquid metals, mattes and slags |
| CN2931784Y (en) * | 2006-05-17 | 2007-08-08 | 李白 | temperature sensor used for bergol logging device |
| CN201034750Y (en) * | 2007-04-30 | 2008-03-12 | 中国三江航天集团远方科技开发公司 | Novel down-hole temperature-sensing measurement mechanism |
| CN102031961A (en) * | 2009-09-30 | 2011-04-27 | 西安威尔罗根能源科技有限公司 | Borehole temperature measuring probe |
| CN101706328A (en) * | 2009-11-02 | 2010-05-12 | 一重集团大连设计研究院有限公司 | Thermocouple lead sealing equipment |
| CN201896612U (en) * | 2010-11-11 | 2011-07-13 | 中国海洋石油总公司 | Downhole temperature sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700814A (en) * | 2019-10-28 | 2020-01-17 | 贵州航天凯山石油仪器有限公司 | Method and device for improving sealing reliability of gas well pressure gauge |
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| CN105422083B (en) | 2018-08-07 |
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