CN203589673U - Downhole instrument connection cable sealing structure - Google Patents
Downhole instrument connection cable sealing structure Download PDFInfo
- Publication number
- CN203589673U CN203589673U CN201320795035.XU CN201320795035U CN203589673U CN 203589673 U CN203589673 U CN 203589673U CN 201320795035 U CN201320795035 U CN 201320795035U CN 203589673 U CN203589673 U CN 203589673U
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- Prior art keywords
- cable
- hole
- hermetically
- casing pipe
- cable connectors
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- 238000007789 sealing Methods 0.000 title claims abstract description 78
- 238000010276 construction Methods 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Laying Of Electric Cables Or Lines Outside (AREA)
- Cable Accessories (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
The utility model discloses a downhole instrument connection cable sealing structure which comprises a downhole instrument 1 and a cable 2. A cable connector interface 3 is arranged on the casing of the downhole instrument. The cable connector interface is a three-section step hole. The upper section of the bottom of the three-section step hole is a small diameter threaded section; the intermediate section is an intermediate diameter unthreaded hole section; and the upper part is a large diameter threaded section. The small diameter threaded section is in threaded connection with a cable connector 4. A rubber sleeve is arranged on one end of the cable connector. The cable is welded with the cable connector in the rubber sleeve. A sealing plug 5 is arranged in the intermediate diameter unthreaded hole section. A sealing bushing 6 is arranged outside the rubber sleeve. The sealing bushing is in sealing connection with the large diameter threaded section. According to the utility model, the cable connector is sealed mainly through the rubber sleeve wrapped outside the cable connector; the rubber sleeve and the cable connector interface are sealed in the sealing bushing through the sealing bushing; the connection reliability of the cable and the downhole instrument is greatly improved; and the reliability of long-term work of the downhole instrument in a downhole harsh environment can be ensured.
Description
Technical field
the utility model relates to a kind of hermetically-sealed construction of downhole instrument stube cable, belongs to oil field well instrument cable joint sealing technical field.
Background technology
in order to coordinate the requirement that becomes more meticulous and recover the oil, need in oil well, place quantitative production mandrel and carry out the parameters such as real-time monitored strata pressure, production fluid amount, moisture content, temperature, this appliance requires is in down-hole continuous operation more than 500 days.Due in oil well all the time in the many water states of HTHP, so instrument is extremely severe at the operational environment of down-hole.Normal work in order to ensure instrument in down-hole, must guarantee the reliability that cable is connected with instrument.The reliability that cable is connected with instrument is mainly determined by the sealing at tie point place.Once seal failure, gently makes instrument short circuit, cannot work; Heavy may cause instrument to be scrapped.At present conventional hermetically-sealed construction cannot meet instrument for a long time in the requirement of underground work.Therefore need to strengthen the sealing of cable and instrument junction.
Summary of the invention
the purpose of this utility model is, a kind of hermetically-sealed construction of downhole instrument stube cable is provided, and improves the reliability of cable and the sealing of instrument junction, guarantees that instrument can the long-term normal work in down-hole.
the technical solution of the utility model:
a hermetically-sealed construction for downhole instrument stube cable, comprises downhole instrument and cable, and the shell of downhole instrument is provided with cable connectors interface; Cable connectors interface is three sections of stepped holes; The bottom epimere of three sections of stepped holes is minor diameter thread segment, and middle part is middle diameter unthreaded hole section, and top is major diameter thread segment; Minor diameter thread segment and cable connectors are spirally connected, and cable connectors one end is provided with gum cover, and cable welds with cable connectors in gum cover, in middle diameter unthreaded hole section, is provided with sealing plug; Gum cover is provided with Sealed casing pipe outward, and Sealed casing pipe and major diameter thread segment are tightly connected.
in aforementioned hermetically-sealed construction, the major diameter thread segment of described Sealed casing pipe lower end and cable connectors interface is spirally connected; Step between major diameter thread segment and middle diameter unthreaded hole section is provided with sealing ring.
in aforementioned hermetically-sealed construction, the described Sealed casing pipe other end is provided with through wires hole and internal thread, and internal thread and housing screw are spirally connected, and housing screw is provided with through hole; The aperture of through wires hole is provided with spherical sealing element, and spherical sealing element is provided with cable-through hole; Cable is successively through through hole, the cable-through hole on spherical sealing element and the through wires hole on Sealed casing pipe on housing screw and cable connectors welding.
in aforementioned hermetically-sealed construction, described gum cover is tubulose, and one end is enclosed within on cable, and the other end is pressed on cable connectors through sealing plug in the middle diameter unthreaded hole section of cable connectors interface.
in aforementioned hermetically-sealed construction, described cable is the triumphant first cable of steel pipe cable or steel.
in aforementioned hermetically-sealed construction, described sealing plug, sealing ring, spherical sealing element and gum cover are high-temperature oil resistance rubber part.
in aforementioned hermetically-sealed construction, one end that described through hole contacts with spherical sealing element with through wires hole is horn mouth.
compared with prior art, the utility model adopts double sealing structure to seal cable joint.To the sealing of cable joint, be mainly to be realized by the gum cover that is wrapped in cable joint outside.And then by Sealed casing pipe, gum cover is enclosed in Sealed casing pipe together with cable connectors interface.The connection reliability of cable and downhole instrument is improved greatly, can guarantee the reliability of downhole instrument long-term work in the adverse circumstances of down-hole.The utility model is simple in structure, and implementation cost is low, and the exploitation of oil-gas reservoir and exploration are had to directive significance.
Accompanying drawing explanation
fig. 1 is structural representation of the present utility model;
fig. 2 is the structural representation of cable connectors interface;
fig. 3 is the structural representation of Sealed casing pipe;
fig. 4 is the structural representation of housing screw;
fig. 5 is the structural representation of spherical sealing element.
being labeled as in accompanying drawing: 1-downhole instrument, 2-cable, 3-cable connectors interface, 3a-minor diameter thread segment, diameter unthreaded hole section in 3b-, 3c-major diameter thread segment, 4-cable connectors, 4a-gum cover, 5-sealing plug, 6-Sealed casing pipe, 6a-through wires hole, 6b-internal thread, 7-sealing ring, 8-housing screw, 8a-through hole, 9-spherical sealing element, 9a-cable-through hole.
Embodiment
below in conjunction with accompanying drawing, the utility model is described in further detail, but not as to any restriction of the present utility model.
a hermetically-sealed construction for downhole instrument stube cable, as shown in Figure 1, comprises downhole instrument 1 and cable 2, and the shell of downhole instrument 1 is provided with cable connectors interface 3; Cable connectors interface 3 is three sections of stepped hole (see figure 2)s; The bottom epimere of three sections of stepped holes is minor diameter thread segment 3a, and middle part is middle diameter unthreaded hole section 3b, and top is major diameter thread segment 3c; Minor diameter thread segment 3a and cable connectors 4 are spirally connected, and cable connectors 4 one end are provided with gum cover 4a, and cable 2 welds with cable connectors 4 in gum cover 4a, in middle diameter unthreaded hole section 3b, is provided with sealing plug 5; Gum cover 4a is provided with Sealed casing pipe 6 outward, and Sealed casing pipe 6 is tightly connected with major diameter thread segment 3c.The major diameter thread segment 3c of Sealed casing pipe 6 lower ends and cable connectors interface 3 is spirally connected; Step between major diameter thread segment 3c and middle diameter unthreaded hole section 3b is provided with sealing ring 7.Sealed casing pipe 6 other ends are provided with through wires hole 6a and internal thread 6b(is shown in Fig. 3), internal thread 6b and housing screw 8 are spirally connected, housing screw 8 is provided with through hole 8a(and sees Fig. 4); The aperture of through wires hole 6a is provided with spherical sealing element 9, and spherical sealing element 9 is provided with cable-through hole 9a(and sees Fig. 5); Cable 2 is successively through through hole 8a, the cable-through hole 9a on spherical sealing element 9 on housing screw 8 and the through wires hole 6a on Sealed casing pipe 6 and cable connectors 4 welding.Gum cover 4a is tubulose, and one end is enclosed within on cable 2, and the other end is pressed on cable connectors 4 through sealing plug 5 at the middle diameter unthreaded hole section 3b of cable connectors interface 3.Cable 2 is the triumphant first cable of steel pipe cable or steel.Sealing plug 5, sealing ring 7, spherical sealing element 9 and gum cover 4a are high-temperature oil resistance rubber part.One end that through hole 8a contacts with spherical sealing element 9 with through wires hole 6a is horn mouth 6c.
Embodiment
the structure of the present embodiment as shown in Figure 1, while specifically implementing, is processed into three sections of stepped holes as shown in Figure 2 by the cable connectors interface 3 on downhole instrument 1, and bottom epimere is processed into minor diameter thread segment 3a, is mainly used in being connected with cable connectors 4; Middle diameter unthreaded hole section 3b is processed at middle part, is mainly used in filling sealing plug 5, strengthens the sealing between cable connectors 4 and downhole instrument 1 shell; Top is major diameter thread segment 3c, for connecting Sealed casing pipe 6.By Sealed casing pipe 6, the whole cable connectors 4 that comprises gum cover 4a is enclosed in Sealed casing pipe 6.Sealed casing pipe 6 is provided with sealing ring 7 with the junction of major diameter thread segment 3c, when Sealed casing pipe 6 be tightened on major diameter thread segment 3c upper after, by sealing ring 7 crimps to reach sealing function.Sealed casing pipe 6 other ends complete sealing by housing screw 8 and spherical sealing element 9.During installation, spherical sealing element 9 is through on cable 2, after housing screw 8 and Sealed casing pipe 6 are spirally connected, 6 pairs of spherical sealing elements of housing screw 8 and Sealed casing pipe are exerted pressure at two ends Shang Xia 9, make spherical sealing element 9 produce distortion, the cable-through hole 9a of spherical sealing element 9 holds cable 2 tightly on the one hand, completes the sealing between spherical sealing element 9 and cable 2; Spherical sealing element 9 two ends and housing screw 8 and Sealed casing pipe 6 close contacts complete the sealing of spherical sealing element 9 outsides on the other hand.
the utility model is as follows in installation process;
the first step, first the termination of cable 2 is penetrated successively to the through hole 8a of housing screw 8, the through wires hole 6a of the cable-through hole 9a of spherical sealing element 9, Sealed casing pipe 6 and the gum cover 4a on cable connectors 4; The direction of noting housing screw 8, Sealed casing pipe 6 and gum cover 4a, direction is not worn instead as shown in Figure 1.
second step, cable 2 heart yearn strip ofves are exposed to copper conductor, the jack welding on copper conductor and cable connectors 4 is reliable.
the 3rd step, gum cover 4a is smoothed out with the fingers downwards along cable 2, make cable joint be positioned at gum cover 4a, then with cotton rope, gum cover 4a upper end colligation is solid, be preferably coated with the sealing that a little glue is carried out gum cover 4a upper end.
the 4th step, first sealing ring 7 and sealing plug 5 are enclosed within to gum cover 4a lower end successively, then the minor diameter thread segment 3a that cable connectors 4 is screwed in to cable connectors interface 3 tightens, again sealing plug 5 is filled in to the middle diameter unthreaded hole section 3b of cable connectors interface 3 together with gum cover 4a lower end, completed the first sealing of cable joint.
the 5th step, sealing ring 7 is smoothed out with the fingers downwards on the major diameter thread segment 3c and the step between middle diameter unthreaded hole section 3b of cable connectors interface 3, and then the major diameter thread segment 3c that Sealed casing pipe 6 is screwed into cable connectors interface 3 is tightened, make sealing ring 7 produce distortion, complete the sealing of Sealed casing pipe 6 lower ends.
the 6th step, spherical sealing element 9 is smoothed out with the fingers downwards to the horn mouth 6c place of the through wires hole 6a of Sealed casing pipe 6 along cable 2, and then the internal thread 6b that housing screw 8 is screwed into Sealed casing pipe 6 upper ends is tightened, make spherical sealing element 9 produce distortion, complete the sealing between Sealed casing pipe 6 upper ends and spherical sealing element 9 and cable.
this example is mainly to be realized by the gum cover 4a that is wrapped in cable joint outside to the sealing of cable joint.And then by Sealed casing pipe 6, gum cover 4a is enclosed in Sealed casing pipe 6 together with cable connectors interface 3.The connection reliability of cable and downhole instrument is improved greatly, can guarantee the reliability of downhole instrument long-term work in the adverse circumstances of down-hole.
Claims (7)
1. a hermetically-sealed construction for downhole instrument stube cable, comprises downhole instrument (1) and cable (2), and the shell of downhole instrument (1) is provided with cable connectors interface (3); It is characterized in that: cable connectors interface (3) is three sections of stepped holes; The bottom epimere of three sections of stepped holes is minor diameter thread segment (3a), and middle part is middle diameter unthreaded hole section (3b), and top is major diameter thread segment (3c); Minor diameter thread segment (3a) is spirally connected with cable connectors (4), and cable connectors (4) one end is provided with gum cover (4a), and cable (2) welds with cable connectors (4) in gum cover (4a), is provided with sealing plug (5) in middle diameter unthreaded hole section (3b); The outer Sealed casing pipe (6) that is provided with of gum cover (4a), Sealed casing pipe (6) is tightly connected with major diameter thread segment (3c).
2. hermetically-sealed construction according to claim 1, is characterized in that: the major diameter thread segment (3c) of described Sealed casing pipe (6) lower end and cable connectors interface (3) is spirally connected; Step between major diameter thread segment (3c) and middle diameter unthreaded hole section (3b) is provided with sealing ring (7).
3. hermetically-sealed construction according to claim 2, is characterized in that: described Sealed casing pipe (6) other end is provided with through wires hole (6a) and internal thread (6b), and internal thread (6b) is spirally connected with housing screw (8), and housing screw (8) is provided with through hole (8a); The aperture of through wires hole (6a) is provided with spherical sealing element (9), and spherical sealing element (9) is provided with cable-through hole (9a); Cable (2) is successively through through hole (8a), the cable-through hole (9a) on spherical sealing element (9) and the through wires hole (6a) on Sealed casing pipe (6) on housing screw (8) and cable connectors (4) welding.
4. hermetically-sealed construction according to claim 3, it is characterized in that: described gum cover (4a) is tubulose, it is upper that one end is enclosed within cable (2), the other end the middle diameter unthreaded hole section (3b) of cable connectors interface (3) through sealing plug (5) jam-packed on cable connectors (4).
5. hermetically-sealed construction according to claim 4, is characterized in that: described cable (2) is steel pipe cable or the triumphant first cable of steel.
6. hermetically-sealed construction according to claim 5, is characterized in that: described sealing plug (5), sealing ring (7), spherical sealing element (9) and gum cover (4a) are high-temperature oil resistance rubber part.
7. hermetically-sealed construction according to claim 6, is characterized in that: one end that described through hole (8a) contacts with spherical sealing element (9) with through wires hole (6a) is horn mouth (6c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320795035.XU CN203589673U (en) | 2013-12-06 | 2013-12-06 | Downhole instrument connection cable sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320795035.XU CN203589673U (en) | 2013-12-06 | 2013-12-06 | Downhole instrument connection cable sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203589673U true CN203589673U (en) | 2014-05-07 |
Family
ID=50587525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320795035.XU Expired - Lifetime CN203589673U (en) | 2013-12-06 | 2013-12-06 | Downhole instrument connection cable sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203589673U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443109A (en) * | 2015-11-02 | 2016-03-30 | 贵州航天凯山石油仪器有限公司 | Refitting method and structure for upper joint assembly |
| CN106463935A (en) * | 2014-06-26 | 2017-02-22 | 株式会社自动网络技术研究所 | Sealing member |
| CN107591771A (en) * | 2017-11-03 | 2018-01-16 | 苏州热工研究院有限公司 | A kind of cable sealing device |
| CN110988379A (en) * | 2019-11-29 | 2020-04-10 | 苏州长风航空电子有限公司 | Rotating speed sensor |
| CN111927370A (en) * | 2020-07-22 | 2020-11-13 | 沈阳工业大学通益科技有限公司 | High-temperature submersible pump lateral wellhead traversing device and cable traversing method |
-
2013
- 2013-12-06 CN CN201320795035.XU patent/CN203589673U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106463935A (en) * | 2014-06-26 | 2017-02-22 | 株式会社自动网络技术研究所 | Sealing member |
| CN105443109A (en) * | 2015-11-02 | 2016-03-30 | 贵州航天凯山石油仪器有限公司 | Refitting method and structure for upper joint assembly |
| CN107591771A (en) * | 2017-11-03 | 2018-01-16 | 苏州热工研究院有限公司 | A kind of cable sealing device |
| CN107591771B (en) * | 2017-11-03 | 2023-08-22 | 苏州热工研究院有限公司 | Cable sealing device |
| CN110988379A (en) * | 2019-11-29 | 2020-04-10 | 苏州长风航空电子有限公司 | Rotating speed sensor |
| CN111927370A (en) * | 2020-07-22 | 2020-11-13 | 沈阳工业大学通益科技有限公司 | High-temperature submersible pump lateral wellhead traversing device and cable traversing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Zongqi Inventor after: Wei Yanhong Inventor after: Yang Ling Inventor after: Lin Tao Inventor after: Zhu Yugui Inventor after: Xiao Yao Inventor after: Long Xianming Inventor before: Zhao Zongqi Inventor before: Wei Yanhong Inventor before: Yang Ling |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHAO ZONGQI WEI YANHONG YANG LING TO: ZHAO ZONGQI WEI YANHONG YANG LING LIN TAO ZHU YUGUI XIAO YAO LONG XIANMING |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |
|
| CX01 | Expiry of patent term |