CN202997494U - Down hole apparatus cable junction structure - Google Patents
Down hole apparatus cable junction structure Download PDFInfo
- Publication number
- CN202997494U CN202997494U CN 201220706940 CN201220706940U CN202997494U CN 202997494 U CN202997494 U CN 202997494U CN 201220706940 CN201220706940 CN 201220706940 CN 201220706940 U CN201220706940 U CN 201220706940U CN 202997494 U CN202997494 U CN 202997494U
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- Prior art keywords
- cable
- sealing
- downhole instrument
- joint
- outer tube
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- Expired - Lifetime
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Abstract
The utility model discloses a down hole apparatus cable junction structure, comprising an armoured cable (12) put down from a well head. Leads in the armoured cable (12) and a leading lead (6) are twisted to form a cable joint; the cable joint is located in an extruding outer pipe (7); an upper end of the extruding outer pipe (7) and a lower end of a compression nut (13) are in sealing screw joint; a lower end of the extruding outer pipe (7) and an upper end of a down hole apparatus (1) are in sealing screw joint; the cable joint is covered by a heat shrinkage pipe (10), two ends of which are bound by a binding wire (9). According to the utility model, a cable is located in a rigid outer sleeve; in a threaded connection process of the outer sleeve, the cable can not rotate with the outer sleeve, which can avoid distorting the cable in the outer sleeve or scraping an insulation layer of the cable in a screw joint process. The down hole apparatus cable junction structure can guarantee that the service life of a joint under down hole severe environments can be more than two years.
Description
Technical field
The utility model relates to a kind of downhole instrument cable connection structure, belongs to the resist technology field of downhole instrument stube cable.
Background technology
Oil field development is after the later stage, and along with the development of water flood recovery technique, the division of oil reservoir is more and more meticulousr, and the interval between adjacent oil reservoir is also more and more less.In order accurately to allocate the size of each layer water injection rate, require to place a downhole instrument in oil pipe the water distribution quantity of down-hole is measured and regulated.Downhole instrument need to be connected with ground installation by cable, and ground installation is realized power supply and communication to downhole instrument by cable.Therefore the connection reliability of cable and joint is to be related to the key that can downhole instrument work in the down-hole.
Downhole instrument is a kind of special instrument, in order to adapt to the environmental requirement of down-hole, downhole instrument is generally the elongated rod-shaped that the more piece tubular member is threaded connection formation, and the space of instrument internal is narrow especially, has brought many difficulties for connection and the sealing of cable.The down-hole is the wet environment of high temperature, high pressure in addition, also contains simultaneously the corrosive substances such as hydrogen sulfide, can cause the different corrosion of degree to cable joint, affect the connection reliability of cable, may affect the accuracy of instrument test, maybe can't control downhole instrument, cause test crash.
Without big envelope one end welding, sealing is plugged with big envelope one end and transition wire bonds to the cable tail of existing downhole instrument with sealing plug, the other end of transition wire and the armoured cable hinge joint that is connected well head, and this hinge joint place is called cable joint.Present cable joint sealing effectiveness is bad, can't resist the wet environment of down-hole high temperature, high pressure, causes the cable joint situation of the corrosion of quilt too early, affects the reliability that cable connects, and causes test crash.
Summary of the invention
The purpose of this utility model is; a kind of downhole instrument cable connection structure is provided, and this structure adopts multiple protection measure in the junction of cable, can improve greatly the reliability that cable connects; to guarantee the normal operation of downhole instrument, can overcome the deficiency that prior art exists.
The technical solution of the utility model:
A kind of downhole instrument cable connection structure of the present utility model is, this structure comprises the armoured cable that puts down from well head, the wire in armoured cable with draw the wire hinge joint and consist of cable joint; Cable joint is positioned at the extruding outer tube; The upper end of extruding outer tube and clamp nut lower end sealing are spirally connected, and the lower end of extruding outer tube and downhole instrument upper end sealing are spirally connected; The cable joint overcoat has heat-shrinkable tube, the wiring colligation of the two ends of heat-shrinkable tube.
In aforementioned structure, describedly draw the wire other end and sealing and be plugged with the welding of cover end, sealing plug is without the wire bonds of cover end with downhole instrument.
In aforementioned structure, described sealing plug is tightly connected without cover end and sealing obturating plug, and the sealing obturating plug is connected with the outlet port sealing of downhole instrument, seals the obturating plug upper end and is provided with the compression plug screw, and the line outlet of compression plug screw and downhole instrument is spirally connected.
In aforementioned structure, the endoporus of the endoporus of the upper end of described extruding outer tube and clamp nut lower end is horn mouth, and the armoured cable that is positioned at two horn mouth places is provided with the fusiformis sleeve pipe.
In aforementioned structure, be provided with waterproof grease in described extruding outer tube with in the cavity that pushes the outer tube two ends.
In aforementioned structure, be provided with sealing gasket between described clamp nut and armoured cable, the sealing gasket upper end is provided with plug screw.
Compared with prior art, cable joint of the present utility model forms the multilayer proofing of cable joint by heat-shrinkable tube, waterproof grease, sealing ring and extruding outer tube from the inside to the outside, prevent that the outside adverse circumstances of downhole instrument from causing adverse effect to cable joint, can improve the reliability of downhole instrument stube cable.Because armoured cable is provided with the fusiformis sleeve pipe, the fusiformis sleeve pipe coordinates with horn mouth on extruding outer tube and clamp nut, the more crowded tighter tensile property that improves the cable joint place.Cable of the present utility model is positioned at the outer tube of rigidity, and outer tube is in the process of being threaded, and cable can not followed together and rotate, and can prevent that cable is distorted in outer tube, or scratch the insulating barrier of cable in the process that is spirally connected.The utility model can guarantee that this joint can working life reach more than 2 years in the adverse circumstances of down-hole.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Being labeled as in figure: 1-downhole instrument, 2-sealing obturating plug, 3-lead-in wire, 4-compression plug screw, 5-sealing plug, 6-draw wire, 7-extruding outer tube, 8-waterproof grease, 9-wiring, 10-heat-shrinkable tube, 11-fusiformis sleeve pipe, 12-armoured cable, 13-clamp nut.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing, but not as to any restriction of the present utility model.
The utility model is constructed according to a kind of following method that improves downhole instrument stube cable reliability, as shown in Figure 1, the method be wire bonds with downhole instrument at sealing plug without big envelope one end, sealing is plugged with big envelope one end and transition wire bonds; The other end of transition wire forms cable joint with the armoured cable hinge joint that is connected well head; Cable joint forms the multilayer proofing of cable joint by heat-shrinkable tube, waterproof grease, sealing ring and extruding outer tube from the inside to the outside, prevent that the outside adverse circumstances of downhole instrument from causing adverse effect to cable joint, to improve the reliability of downhole instrument stube cable.The extruding outer tube forms the outermost layer rigid protection layer of cable joint, extruding outer tube lower end is threaded with downhole instrument, extruding outer tube upper end is threaded with clamp nut, the threaded connection place is provided with sealing ring, stop underground water and etchant gas to enter cable joint by sealing ring, form the second overcoat of cable joint.The cable joint overcoat has heat-shrinkable tube, shrinks by heating rear heat-shrinkable tube the innermost layer sealing that cable joint is wrapped in formation cable joint in heat-shrinkable tube.Reach the interior waterproof grease that injects of cavity at extruding outer tube two ends in the extruding outer tube, prevent that by waterproof grease cable joint from rocking in cavity, improve the cable joint anti-seismic performance, the 3rd road overcoat of formation cable joint.
The schematic diagram of the of the present utility model a kind of downhole instrument cable connection structure that consists of according to said method as shown in Figure 1, this structure comprises the armoured cable 12 that puts down from well head, the wire in armoured cable 12 with draw wire 6 hinge joints and consist of cable joints; Cable joint is positioned at extruding outer tube 7; The upper end of extruding outer tube 7 and clamp nut 13 lower end sealings are spirally connected, and the lower end of extruding outer tube 7 and downhole instrument 1 upper end sealing are spirally connected; The cable joint overcoat has heat-shrinkable tube 10, wiring 9 colligations of the two ends of heat-shrinkable tube 10.Drawing wire 6 other ends and sealing plug 5 has the welding of cover end, and sealing plug 5 is without lead-in wire 3 welding of cover end with downhole instrument 1.Sealing plug 5 is tightly connected without cover end and sealing obturating plug 2, and sealing obturating plug 2 is connected with the outlet port sealing of downhole instrument 1, and sealing obturating plug 2 upper ends are provided with and compress plug screw 4, and the line outlet of compression plug screw 4 and downhole instrument 1 is spirally connected.The endoporus of the upper end of extruding outer tube 7 and the endoporus of clamp nut 13 lower ends are horn mouth, and the armoured cable 12 that is positioned at two horn mouth places is provided with fusiformis sleeve pipe 11.Be provided with waterproof grease 8 in extruding outer tube 7 with in the cavity that pushes outer tube 7 two ends.Be provided with sealing gasket 14 between clamp nut 13 and armoured cable 12, sealing gasket 14 upper ends are provided with plug screw 15.
Embodiment
The utility model in the specific implementation, as shown in Figure 1.The lead-in wire 3 that downhole instrument 1 inside can be drawn is welded on sealing plug 5 without an end of sheath, and sealing plug 5 is threaded with sealing obturating plug 2 by the O-ring seals that carries.Sealing obturating plug 2 is arranged in the line outlet of downhole instrument 1 by O-ring seals and 4 sealings of compression plug screw, has an end welding of sheath to draw wire 6 at sealing plug 5.The end that armoured cable 12 is connected with downhole instrument 1 falls approximately 5cm of steel wire shell with grinder buffing, plug screw 15, sealing gasket 14, clamp nut 13 is enclosed within armoured cable 12 successively connects first end.Connect first ends at armoured cable 12 and approximately superscribe fusiformis sleeve pipe 11 between the ectonexine steel wire at 10cm place, to push afterwards outer tube 7 is serially connected on armoured cable 12, guarantee that fusiformis sleeve pipe 11 is between clamp nut 13 and extruding outer tube 7, with armoured cable 12 jam-packeds, prevent that cable from pulling by fusiformis sleeve pipe 11 from downhole instrument.Be intertwined and connected together after the lead removal rubber that the heart yearn that armoured cable 12 is exposed and downhole instrument 1 are drawn by sealing plug 5.Be intertwined and connected and be cable joint.The place puts heat-shrinkable tube 10 at cable joint, and heat hot collapsible tube 10 makes heat-shrinkable tube 10 closely be wrapped in the place that is intertwined and connected, and tighten with wiring 9 at heat-shrink tube two ends, and wiring can adopt fishing line or other nylon wire etc.Fill with Caidon FC10 series waterproof grease 8 in the screw thread installing space of sealing obturating plug 2 and downhole instrument 1 junction, will push outer tube 7 and be threaded connection on downhole instrument 1, in the process of screw-in, unnecessary waterproof grease 8 and air are drained.Fill with Caidon FC10 series waterproof grease 8 in clamp nut 13 threaded mounting holes, be threaded connection afterwards on extruding outer tube 7, in the process of tightening, unnecessary waterproof grease 8 and air are drained, tighten afterwards plug screw 15 sealing gasket 14 is compressed.O-ring seals and sealing gasket 14 all adopt resistant to elevated temperatures fluorubber processing, and other metal parts all adopts corrosion resistance stainless steel processing preferably.So just guaranteed that cable 12 is connected and working life with the reliable of downhole instrument 1.
Claims (6)
1. a downhole instrument cable connection structure, comprise the armoured cable (12) that puts down from well head, the wire in armoured cable (12) with draw wire (6) hinge joint and consist of cable joint; It is characterized in that: cable joint is positioned at extruding outer tube (7); The upper end of extruding outer tube (7) and clamp nut (13) lower end sealing are spirally connected, and the lower end of extruding outer tube (7) and downhole instrument (1) upper end sealing are spirally connected; The cable joint overcoat has heat-shrinkable tube (10), wiring (9) colligation of the two ends of heat-shrinkable tube (10).
2. downhole instrument cable connection structure according to claim 1 is characterized in that: describedly draw wire (6) other end and sealing plug (5) has the welding of cover end, sealing plug (5) is without lead-in wire (3) welding of cover end with downhole instrument (1).
3. downhole instrument cable connection structure according to claim 2, it is characterized in that: described sealing plug (5) is tightly connected without cover end and sealing obturating plug (2), sealing obturating plug (2) is connected with the outlet port sealing of downhole instrument (1), sealing obturating plug (2) upper end is provided with and compresses plug screw (4), and the line outlet that compresses plug screw (4) and downhole instrument (1) is spirally connected.
4. downhole instrument cable connection structure according to claim 3, it is characterized in that: the endoporus of the endoporus of the upper end of described extruding outer tube (7) and clamp nut (13) lower end is horn mouth, and the armoured cable (12) that is positioned at two horn mouth places is provided with fusiformis sleeve pipe (11).
5. downhole instrument cable connection structure according to claim 4 is characterized in that: be provided with waterproof grease (8) in the cavity in described extruding outer tube (7) and extruding outer tube (7) two ends.
6. downhole instrument cable connection structure according to claim 5 is characterized in that: be provided with sealing gasket (14) between described clamp nut (13) and armoured cable (12), sealing gasket (14) upper end is provided with plug screw (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706940 CN202997494U (en) | 2012-12-20 | 2012-12-20 | Down hole apparatus cable junction structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706940 CN202997494U (en) | 2012-12-20 | 2012-12-20 | Down hole apparatus cable junction structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997494U true CN202997494U (en) | 2013-06-12 |
Family
ID=48568626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220706940 Expired - Lifetime CN202997494U (en) | 2012-12-20 | 2012-12-20 | Down hole apparatus cable junction structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997494U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990813A (en) * | 2015-01-28 | 2016-10-05 | 杨洪柱 | Cold shrinkage terminal and manufacturing method thereof |
| CN110620367A (en) * | 2018-06-18 | 2019-12-27 | 先进装配系统有限责任两合公司 | Lead guiding element and machine device |
| CN111180971A (en) * | 2018-11-09 | 2020-05-19 | 惠阳航空螺旋桨有限责任公司 | Wire assembly for electric anti-icing device |
-
2012
- 2012-12-20 CN CN 201220706940 patent/CN202997494U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990813A (en) * | 2015-01-28 | 2016-10-05 | 杨洪柱 | Cold shrinkage terminal and manufacturing method thereof |
| CN105990813B (en) * | 2015-01-28 | 2018-09-18 | 杨洪柱 | A kind of cold-shrinkable terminal and its manufacturing method |
| CN110620367A (en) * | 2018-06-18 | 2019-12-27 | 先进装配系统有限责任两合公司 | Lead guiding element and machine device |
| CN111180971A (en) * | 2018-11-09 | 2020-05-19 | 惠阳航空螺旋桨有限责任公司 | Wire assembly for electric anti-icing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |