CN104747167A - Clear water pressing type contamination-resisting downhole video camera - Google Patents
Clear water pressing type contamination-resisting downhole video camera Download PDFInfo
- Publication number
- CN104747167A CN104747167A CN201310752096.2A CN201310752096A CN104747167A CN 104747167 A CN104747167 A CN 104747167A CN 201310752096 A CN201310752096 A CN 201310752096A CN 104747167 A CN104747167 A CN 104747167A
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- China
- Prior art keywords
- camera
- cable head
- centralizer
- clear water
- circuit board
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
Abstract
The invention provides a clear water pressing type contamination-resisting downhole video camera. The clear water pressing type contamination-resisting downhole camera comprises a cable head, a centralizer and a camera pup joint which are in sequential sealing connection. A camera is arranged at the front end of the camera pup joint. A sealed and communicated circuit channel is formed by the middles of the cable head, the centralizer and the camera pup joint, and a sealed liquid flowing channel is formed outside the circuit channel. A circuit board is arranged in the circuit channel and is electrically connected with the camera through an electric circuit and the circuit channel. An oil-well outer pumping device pumps clear water to a clear-water liquid column cavity at the front end of the camera pup joint via the liquid flowing channel, a clear-water liquid column is formed at the front end of the camera, oil dirt and the like are prevented from contaminating the camera to achieve contamination prevention effect, and clear videos can be effectively acquired in oil wells low in water content.
Description
Technical field
The present invention relates to a kind of can the video camera of real-time monitored downhole conditions, especially a kind of clear water suppresses soil resistant formula downhole imaging instrument, and it is specially adapted to petroleum well logging technology field.
Background technology
Downhole imaging instrument is the tester that a kind of using visible light video camera checks oil, gas, well, can directly be observed by the situation such as casing damage, casing-broken, trouble of lost tool in hole, perforating quality, effective response for water flood direction of logging well by this instrument.
But technique is not used widely in production practices at present, mainly use procedure due to down-hole distance longer, and the impact of borehole wall attachment, be difficult on the one hand protect the shooting pipe nipple being provided with video camera in whole test process to remain on the axis of well, shooting picture can be caused imperfect; On the other hand.Because the borehole wall often can adhere to the dirt such as greasy dirt, wax, known downhole imaging device cannot avoid the contamination of these dirts to camera lens, the definition of meeting effect diagram picture.In addition, after camera lens touches above-mentioned dirt, more cannot clean in down-hole, thus affect the accuracy of test result.Therefore, downhole imaging instrument ubiquity pick-up lens contamination problems have impact on applying of this technology greatly.
Owing to also not having effective solution at present in pick-up lens soil resistant, therefore for low moisture high-yield well, camera is blocked by crude oil, and test success rate is low, and the downhole imaging instrument that so there is no oil-stain-preventing can directly be used on oil well imaging test.
In view of above-mentioned to the requirement of downhole imaging instrument function, the present inventor is according to the Production design experience being engaged in this area and association area for many years, develop a kind of clear water and suppress soil resistant formula downhole imaging instrument, to realize the soil resistant function of downhole imaging instrument, improve the success rate of oil well shooting.
Summary of the invention
The object of this invention is to provide a kind of clear water and suppress soil resistant formula downhole imaging instrument, this video camera can realize the soil resistant function at oil well video camera, downhole imaging instrument camera lens also can be avoided by contaminations such as greasy dirts in producing well, thus obtain the image data of clear down-hole.
For this reason, the present invention proposes a kind of clear water and suppress soil resistant formula downhole imaging instrument, it at least comprises the cable head, centralizer, the camera pipe nipple that are mutually tightly connected successively, and camera is arranged on the front end of described camera pipe nipple; Described cable head, centralizer form sealing and the circuit path be connected with the middle part of camera pipe nipple, and the outside of described circuit path forms fluid course; Circuit board is arranged in described circuit path, and is electrically connected with described camera through described circuit path by electric wiring; By the pumping installations of oil well outside, clear water is pumped to the clear water fluid column chamber of described camera pipe nipple front end through described fluid course, and then forms clear water fluid column in described camera front end.
Clear water as above suppresses releasing formula downhole imaging instrument, wherein, described centralizer comprises: an outer tie rod and the inside connecting rod arranged in the inner, form the electric wiring passage that can be connected with described cable head and camera pipe nipple realizing circuit respectively in the middle part of described inside connecting rod, the annular space between described inside connecting rod and outer tie rod forms the centralizer fluid course that can connect with the flow channel of described cable head and camera pipe nipple respectively; Two support arm holders, can be arranged on outer tie rod outside movably along described outer tie rod length direction; At least four support arm two ends of being made up of elastomeric material are connected with described support arm holders respectively, form the lantern-shaped elastic braced structures of evagination.
Clear water as above suppresses soil resistant formula downhole imaging instrument, wherein, described cable head comprises a cable head shell and is arranged on a circuit board support of described cable head enclosure, one circuit board containment vessel sealing shroud is located at the outside of described circuit board support, and the middle part of described circuit board support is used for the fixing cable head circuit board that can be connected with described centralizer realizing circuit; Annular space between described cable head shell and described circuit board containment vessel forms the first fluid course that can be through with described centralizer fluid course; Described cable head shell one end is connected with for introducing and fixing described downhole imaging instrument electrically and a cable head cap of liquid flow lines, one end of described circuit board support is fixedly connected with described cable head cap, and in the capillary channel that this end is provided with through optical-fibre channel and can connects with described first fluid course, the other end of described circuit board support is provided with the electrical connection core that can be tightly connected with described centralizer realizing circuit.
Clear water as above suppresses soil resistant formula downhole imaging instrument, wherein, described camera pipe nipple has a shell and is placed on an inner casing of its inside, and the annular space between described shell and inner casing forms the camera pipe nipple annular space that sealing is communicated with described centralizer fluid course; The sealing of described inner casing leading section is provided with glass lens, described camera sealing is arranged at described inner casing leading section and close described glass lens, described camera pipe nipple inner chamber is positioned at side, described glass lens front end and forms described clear water fluid column chamber, and described clear water fluid column chamber is communicated with described camera pipe nipple annular space; Form the circuit accommodating cavity of the accommodating camera pipe nipple circuit board of energy in the middle part of described inner casing, described circuit accommodating cavity sealing is communicated with the electric wiring passage of described centralizer; The electric wiring of described downhole imaging instrument is electrically connected with described camera through described camera pipe nipple circuit board.
Clear water of the present invention suppresses soil resistant formula downhole imaging instrument, pass through cable head, the setting of through electrical path and fluid course in centralizer and camera pipe nipple, realizing while video camera electric wiring is connected with camera, the clear water being suppressed injection by ground pumping installations finally arrives camera pipe nipple front end by fluid course and forms clear water fluid column, make greasy dirt, impurity etc. can not pollute the glass lens of camera front end under the effect of clear water fluid column, thus reach the object of soil resistant, achieve the function effectively obtaining sharp image in low aqueous well, possesses the function that other downhole imaging instrument at present do not possess.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is that clear water of the present invention suppresses soil resistant formula downhole imaging instrument structural representation.
Fig. 2 is the structure chart that clear water of the present invention suppresses the centralizer of soil resistant formula downhole imaging instrument.
Fig. 3 is the top view that clear water of the present invention suppresses the centralizer of soil resistant formula downhole imaging instrument.
Fig. 4 is the zoomed-in view that clear water of the present invention suppresses the centralizer upper end of soil resistant formula downhole imaging instrument.
Fig. 5 is the zoomed-in view that clear water of the present invention suppresses the centralizer lower end of soil resistant formula downhole imaging instrument.
Fig. 6 is the structure chart that clear water of the present invention suppresses the cable head of soil resistant formula downhole imaging instrument.
Fig. 7 is the optical fiber of cable head, the zoomed-in view of capillary tube access section that clear water of the present invention suppresses soil resistant formula downhole imaging instrument.
Fig. 8 is the structure chart that clear water of the present invention suppresses the camera pipe nipple of soil resistant formula downhole imaging instrument.
Fig. 9 is the A direction view of Fig. 8.
Figure 10 is the zoomed-in view that clear water of the present invention suppresses the pressure balance type hermetically-sealed construction of soil resistant formula downhole imaging instrument.
Figure 11 is the structural representation that clear water of the present invention suppresses the cable head of soil resistant formula downhole imaging instrument, centralizer, camera pipe nipple junction.
Drawing reference numeral illustrates:
1-cable head, the lower contact of 11-cable head, 13-cable head connecting rod, 130-second fluid course, 131-fluid outlet, 16-cable head shell, 17-circuit board containment vessel, 170-first fluid course, 18-circuit board support, 111-sealing shroud, 1121-capillary tube holder, 1122-capillary tube tightening head, 113-hold-doun nut, 114-cable connector, 115-cable head cap, 1150-installation portion, 1151-through channel, 117-bail wire, 118-fixation with steel wire cap, 119-circuit plug, 181-connecting rod portion, 182-circuit board holding part, 183-optical-fibre channel, 1831-first bellmouth, 184-capillary channel, 1841-second bellmouth,
121-is electrically connected core, 2-centralizer, the upper centralizer of 2A-, centralizer under 2B-, the top connection of 21-centralizer, 25-outer tie rod, 26-supports back-moving spring, 27-support arm retainer plate, 29-support arm holders, 210-centring ring, 212-support arm, 213-inside connecting rod, the lower contact of 215-centralizer, plug under 216-, 219-electric wiring passage, 220-centralizer fluid course, 221-through hole, 222-weep hole;
3-camera pipe nipple, 31-camera, 33-quartz glass eyeglass, 34-bearing support, 35-pressure balance type hermetically-sealed construction, 36-clear water fluid column chamber, 37-camera pipe nipple annular space, 38-circuit accommodating cavity, 39-clear water via, 310-central tube annular space, 311-flow channel interface, 312-central tube, 313-inner casing, 314-shell, 315-central tube electric path 316-rubber tube, the outer pressure guide hole of 317-, pressure guide hole in 318-, 319-camera bracket, 320-circuit board fixed part, 321-connects wire, 322-sealing-plug, 323-lens supporting structure, 324-lens element retainer ring, 325-axial sealing ring, 326-is in the light sealing ring, 327-axial sealing ring, 328-LED circuitboard, 329-boss,
41-female end plug annular space, 42-female end plug pod apertures, 43-female end and male end junction annular space, 44-public terminal plug pod apertures, 45-public terminal plug annular space buffer area, 46-public terminal plug annular space, 47-female end plug core path, 48-attachment plug seat, 49-public terminal plug center channel.
Detailed description of the invention
The present invention proposes a kind of clear water and suppresses soil resistant formula downhole imaging instrument, and it at least comprises the cable head, centralizer, the camera pipe nipple that are mutually tightly connected successively, and camera is arranged on the front end of described camera pipe nipple; Cable head, centralizer form sealing and the circuit path be connected with the middle part of camera pipe nipple, and the outside of circuit path forms the fluid course of sealing; Circuit board is arranged in circuit path, and is electrically connected with camera through circuit path by electric wiring; By the pumping installations of oil well outside, clear water is pumped to the clear water fluid column chamber of camera pipe nipple front end through fluid course, and then forms clear water fluid column in camera front end.
Wherein, centralizer comprises: an outer tie rod and the inside connecting rod arranged in the inner, the electric wiring passage that can be connected with cable head and camera pipe nipple realizing circuit is respectively formed, the centralizer fluid course that the annular space formation between inside connecting rod and outer tie rod can connect with the flow channel of cable head and camera pipe nipple respectively in the middle part of inside connecting rod; Two support arm holders, can be arranged on outer tie rod outside movably along outer tie rod length direction; At least four support arm two ends of being made up of elastomeric material are connected with support arm holders respectively, form the lantern-shaped elastic braced structures of evagination.
In a concrete technical scheme, cable head comprises a cable head shell and is arranged on a circuit board support of cable head enclosure, one circuit board containment vessel sealing shroud is located at the outside of circuit board support, and the middle part of circuit board support is used for the fixing cable head circuit board that can be connected with centralizer realizing circuit; Annular space between cable head shell and circuit board containment vessel forms the first fluid course that can be through with centralizer fluid course; Cable head shell one end is connected with for introducing and fixing downhole imaging instrument electrically and a cable head cap of liquid flow lines, one end of circuit board support is fixedly connected with cable head cap, and in the capillary channel that this end is provided with through optical-fibre channel and can connects with the first fluid course, the other end of circuit board support is provided with the electrical connection core that can be tightly connected with centralizer realizing circuit.
In addition, camera pipe nipple has a shell and is placed on an inner casing of its inside, and the annular space between shell and inner casing forms the camera pipe nipple annular space that sealing is communicated with centralizer fluid course; The sealing of inner casing leading section is provided with glass lens, and camera sealing is arranged at inner casing leading section and near glass lens, camera pipe nipple inner chamber is positioned at side, glass lens front end and forms clear water fluid column chamber, and clear water fluid column chamber is communicated with camera pipe nipple annular space; Form the circuit accommodating cavity of the accommodating camera pipe nipple circuit board of energy in the middle part of inner casing, the sealing of circuit accommodating cavity is communicated with the electric wiring passage of centralizer; The electric wiring of downhole imaging instrument is electrically connected with camera through camera pipe nipple circuit board.
Clear water of the present invention suppresses soil resistant formula downhole imaging instrument, pass through cable head, the setting of through electrical path and fluid course in centralizer and camera pipe nipple, realizing while video camera electric wiring is connected with camera, the clear water being suppressed injection by ground pumping installations finally arrives camera pipe nipple front end by fluid course and forms clear water fluid column, make greasy dirt, impurity etc. can not pollute the glass lens of camera front end under the effect of clear water fluid column, thus reach the object of soil resistant, achieve the function effectively obtaining sharp image in low aqueous well, possesses the function that other downhole imaging instrument at present do not possess.Due to the amount of controllably face supercharging equipment injected clear water, therefore the present invention also has certain cleaning lens function.
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, below in conjunction with accompanying drawing and preferred embodiment, the detailed description of the invention of soil resistant formula downhole imaging instrument, structure, feature and effect are suppressed to clear water of the present invention, is described in detail as follows.In addition, by the explanation of detailed description of the invention, when can to the present invention for the technological means reaching predetermined object and take and effect are goed deep into concrete understanding more, but institute's accompanying drawing be only to provide with reference to and use is described, is not used for being limited the present invention.
As shown in Figure 1, for clear water of the present invention suppresses the structural representation of soil resistant formula downhole imaging instrument one embodiment.As shown in Figure 1, downhole imaging instrument comprises the cable head 1, centralizer 2 and the camera pipe nipple 3 that are mutually tightly connected successively.Simultaneously with reference to figure 8, a camera 31 is arranged on the front end (in this agreement, the left end of Fig. 1, Fig. 8 and Figure 10 is the front end of camera pipe nipple 3) of camera pipe nipple 3.The middle part of described cable head 1, centralizer 2 and camera pipe nipple 3 forms sealing and mutually through circuit path, and the electric wiring of described downhole imaging instrument is electrically connected with camera 31 through described circuit path; The outside of described circuit path forms airtight setting and mutually through fluid course; by the pumping installations of oil well outside clear water be pumped to the clear water fluid column chamber 36 of described camera pipe nipple 3 front end through described fluid course and form a clear water fluid column; thus protection camera, play the function of soil resistant.
In the present invention, the magnitude setting of centralizer 2 is not limited, can a centralizer 2 be set between cable head 1 and camera pipe nipple 3, also two (as shown in Figure 1) or multiple centralizer 2 can be set as required, to improve righting effect, ensure that video camera can remain on the axis of oil well, thus ensure the picture integrality of shooting.Usually, in straight well detects, when wellbore conditions is better, can adopts and a centralizer 2 is set, and when horizontal well detects, two or more centralizer 2 can be set usually.
As shown in Fig. 2 to 5, be overall structure and the partial enlarged view of centralizer in the present invention 2.Described centralizer 2 has an outer tie rod 25 and arranges inside connecting rod 213 in the inner, is formed and can realize with cable head 1 and camera pipe nipple 3 the electric wiring passage 219 that electric wiring is tightly connected respectively in the middle part of described inside connecting rod 213; Annular space between inside connecting rod 213 and outer tie rod forms the centralizer fluid course 220 that can connect with the flow channel of cable head 1 and camera pipe nipple 3 respectively; Further, the upper end of inside connecting rod 213 and outer tie rod 25 is sealedly attached to centralizer top connection 21 respectively by sealing ring, the salable cable head lower contact 11 being connected to described cable head 1 of this centralizer top connection 21.The lower end of outer tie rod 25 is sealedly connected with and can forms with camera pipe nipple 3 the centralizer lower contact 215 be tightly connected.
Further, the sidewall of centralizer top connection 21 is provided with the through hole 221 of through described centralizer fluid course 220; The sidewall that outer tie rod 25 is positioned at centralizer lower contact 215 is provided with the weep hole 222 of through centralizer fluid course 220, and the setting of above-mentioned through hole 221 and weep hole 222 achieves the mutually through of centralizer fluid course 220 and cable head flow channel and camera pipe nipple flow channel.
In addition, inside connecting rod 213 is positioned at centralizer lower contact 215 and one end of outstanding outer tie rod 25 is provided with the lower plug 216 realizing electric wiring with camera pipe nipple 3 and be tightly connected, and lower plug 216 periphery wall is provided with sealing ring.
Further, two support arm holders 29 are arranged on the outside of outer tie rod 25 movably along the length direction of outer tie rod 25, and in two support arm holders 29 with abutted a support back-moving spring 26 between centralizer top connection 21 and centralizer lower contact 215 respectively, two support arm holders 29 are respectively provided with a centring ring 210, in order to limit the stroke of support arm holders 29 away from the side of above-mentioned support back-moving spring 26.Four support arm be made up of elastomeric material 212 two ends are connected with support arm holders 29 respectively and can form the lantern-shaped elastic braced structures of evagination, and four support arms 212 are circumferentially uniform, in addition, support arm holders 29 has a ring groove, the bottom of this groove is evenly provided with four breach, the two ends of each support arm 212 form I-shaped groove further, and the width of described I-shaped groove matches with described breach; The two ends of support arm 212 are embedded in the groove of support arm holders 29 respectively, two support arm retainer plates 27 are threadedly connected to two support arm holders 29 respectively, and one end of support arm retainer plate 27 is resisted against described support arm 212, support arm 212 and support arm holders 29 are connected to one.
As shown in Figure 6, be the structure chart of cable head 1 of the present invention.Wherein, this cable head 1 comprise be connected successively cable head lower contact 11, cable head connecting rod 13, cable head shell 16, cable head cap 115, and be arranged on the circuit board support 18 of cable head shell 16 inside, cable head connecting rod 13 two ends are tightly connected by sealing ring with cable head lower contact 11 and cable head shell 16 respectively, one end of circuit board support 18 is threaded with cable head cap 15, and the periphery wall of this end and cable head shell 16 are tightly connected by sealing ring, the other end forms connecting rod portion 181 and runs through cable head connecting rod 13 and extends in cable head lower contact 11, the middle part of this circuit board support 18 forms a circuit board holding part 182, for the fixing cable head circuit board that can be connected with centralizer 2 realizing circuit, be positioned at cable head lower contact 11 and the connection cadre 18 of outstanding cable head connecting rod 13 one end (being left end as shown in Figure 6) is provided with an electrical connection core 121, this electrical connection core 121 periphery wall is provided with sealing ring, the circuit that aforementioned cable head circuit board is drawn realizes being tightly connected with the electric wiring of centralizer 2 through electrical connection core 121, one circuit board containment vessel 17 is set in the outside of circuit board holding part 182, is tightly connected by sealing ring and circuit board support 18, and the annular space between circuit board containment vessel 17 and cable head shell 16 forms the first fluid course 170, connecting rod portion 181 and the annular space between cable head connecting rod 13 of circuit board support 18 form the second fluid course 130 be connected with the first fluid course 170, cable head connecting rod 13 sidewall being positioned at cable head lower contact 11 is provided with the fluid outlet 131 of through second fluid course 130 and centralizer fluid course 220, and then ground pumping installations pumps into the clear water of cable head 1 through the first fluid course 170, second fluid course 130, finally enters centralizer fluid course 220.
One end that circuit board support 18 is connected with cable head cap 115 is provided with the optical-fibre channel 183 connected with circuit board holding part 182, for sealing the fixing optical fiber introduced through cable head cap 115, and realizes the connection of optical fiber and cable head circuit board.This optical-fibre channel 183 one end is provided with the first bellmouth 1831, as shown in Figure 7, the sealing shroud 111 that can match with the first bellmouth 1831 inner surface is embedded with in it, sealing cover 111 is quality of rubber materials, optical fiber can enter this optical-fibre channel 183 through sealing shroud 111, one hold-doun nut 113 being provided with axially extending bore is threadedly connected to this optical-fibre channel 183 one end, and this hold-doun nut 113 can sealing shroud 111 described in contact and seal this optical-fibre channel 183 after incoming fiber optic.
The one end being provided with optical-fibre channel 183 at circuit board support 18 is provided with a capillary channel 184 simultaneously, and this capillary channel 184 is connected with the first fluid course 170, for sealing the fixing capillary tube introduced through described cable head cap 115.This capillary channel 184 one end is provided with the second bellmouth 1841, one group of capillary tube holder 1121 that can match with the inner surface of the second bellmouth 1841 and capillary tube tightening 1122 is embedded with in it, this capillary tube holder 1121 and capillary tube tightening 1122 can be formed with the capillary tube penetrated and be fastened and connected, one hold-doun nut 113 being provided with axially extending bore is threadedly connected to described capillary channel 184 one end, the cooperation place of described capillary tube holder 1121 and capillary tube tightening 1122 and the second bellmouth 1841 can compress and be formed and be tightly connected by this hold-doun nut 113.
As shown in Figure 6, described cable head cap 115 has the through channel 1151 of hollow, and the one end be connected with described circuit board support 18 forms an expanding installation portion 1150, be provided with the circuit fixing device for fixed fiber, cable and capillary tube in this through channel 1151, this is routine techniques to comprise the bail wire 117, fixation with steel wire cap 118 and the circuit plug 119(that are connected successively); One cable connector 114 is fixed on one end that circuit board support 18 is connected with cable head cap 115, to introduce and the cable fixed is fixedly welded on described cable connector 114 further and the described circuit board support 18 of sealing access is connected (this be routine techniques, be not repeated herein) with cable head circuit board through described circuit fixing device.
As shown in Figure 8, be the structural representation of camera pipe nipple 3 of the present invention.Described camera pipe nipple 3 has a shell 314 and is placed on an inner casing 313 of its inside, and this inner casing 313 rearward end extends to the outside of shell 314, the leading section of shell 314 is provided with four uniform boss 329 of circumference, as shown in Figures 9 and 10, the leading section of inner casing 313 is embedded in this four boss, inner casing 313 rearward end is provided with a central tube 312 simultaneously, annular space between described inner casing 313 and shell 314 forms camera pipe nipple annular space 37, annular space between central tube 312 and inner casing 313 forms central tube annular space 310, one end (as shown in Figure 8 for the right-hand member) sidewall that inner casing 313 given prominence to by central tube 312 is provided with the flow channel interface 311 of through centralizer fluid course 220 and central tube annular space 310, and inner casing 313 sidewall is provided with the clear water via 39 of through camera pipe nipple annular space 37 and central tube annular space 310, form a circuit board protection chamber 38 in the middle part of the inner chamber of inner casing 313, central tube annular space 310 and circuit board are protected between chamber 38 by sealing ring seal isolation, central tube 312 inside forms the electric wiring passage 219 of through described centralizer and the central tube electric path 315 in circuit board protection chamber 38.
Further, central tube 312 is given prominence to the end that one end of inner casing 313 and inner casing 313 give prominence to shell 314 and is jointly formed the camera pipe nipple top connection be tightly connected with centralizer lower contact 215.
The leading section of inner casing 313 is provided with pressure balance type hermetically-sealed construction 35 further, please refer to Figure 10, it is provided with camera bracket 319 and a bearing support 34, the rearward end of this bearing support 34 front end and camera bracket 319 is sealedly and fixedly connected, the rear end of bearing support 34 forms circuit board fixed part 320, for fixing camera pipe nipple circuit board, the rearward end of this circuit board fixed part 320 is connected with central tube 312.One quartz glass eyeglass 33 is sealingly fastened in the leading section of camera bracket 319 by lens element retainer ring 324, be tightly connected between this lens element retainer ring 324 and quartz glass eyeglass 33 by axial sealing ring 325; Be tightly connected by another sealing ring between lens element retainer ring 324 periphery wall and inner casing 313; The support axial sealing ring 327 of be in the light sealing ring 326 and outer ring respectively by inner ring between camera bracket 319 and quartz glass eyeglass 33 is tightly connected; Described camera bracket 319 inner chamber is fixed with a LED circuitboard 328 near camera lens one end of camera 31, for camera 31 provides pickup-light source.
Camera 31 is fixed in described camera bracket 319, the leading section of bearing support 34 is axially arranged with a sealing-plug 322, sealing plug 322 is provided with and connects wire 321, and the wire of camera 31 and data wire can realize the connection with camera pipe nipple circuit board through this connection wire 321.Seal between camera bracket 319 and inner casing 313 and be provided with a rubber tube 316, be positioned at and correspondingly respectively on the inner casing 313 of these rubber tube 316 both sides and camera bracket 319 be provided with multiple through outer pressure guide hole 317 and pressure guide hole 318; Hydraulic oil is full of in the space of the accommodating camera 31 of camera bracket 319.
Camera pipe nipple 3 inner chamber is positioned at side, quartz glass eyeglass 33 front end and forms a clear water fluid column chamber 36, this clear water fluid column chamber 36 connects with camera pipe nipple annular space 37, the clear water that ground pumping installations injects described downhole imaging instrument eventually passes through four boss 329 of shell 314 gap through described fluid course enters described clear water fluid column chamber 36, and in this chamber, form a clear water fluid column, because down-hole liquid is contrary with the direction of motion of video camera, dirt in downhole fluid directly can rush at the quartz glass eyeglass 33 of camera pipe nipple 3, in clear water fluid column chamber 36 clear water protection under dirt can not directly be bonded on eyeglass, if downhole fluid and camera pipe nipple 3 relative velocity larger time, need the injection pressure increasing injected clear water, to improve the flow velocity of clear water, dirt was just rinsed by clear water before not arriving clear water fluid column chamber 36, make it flow to change, flow through along camera pipe nipple shell 314 outer wall, quartz glass eyeglass 33 can not be stain, prevent greasy dirt, impurity etc. contact with lens element, reach the object of isolation soil resistant.
Below in conjunction with accompanying drawing 11 further illustrate cable head 1, centralizer 2 and camera pipe nipple 3 between two between the matching relationship of junction.In this agreement, the right of Figure 11 is the top of this syndeton.As shown in figure 11, position is defined as (the i.e. corresponding cable head lower contact 11 of female end plug at the link of upper parts, centralizer lower contact 215), position under the link of parts be defined as public terminal plug (i.e. corresponding centralizer top connection 21, camera pipe nipple top connection), after female end plug is connected with public terminal plug, the clear water that ground pumping installations injects passes through female end plug annular space 41 through position successively at the fluid course of upper parts, female end plug pod apertures 42, female end and male end junction annular space 43, public terminal plug pod apertures 44, public terminal plug annular space buffer area 45, public terminal plug annular space 46 and in-position under the fluid course of parts, and finally enter the clear water fluid column chamber 36 of camera pipe nipple 3.The electric wiring of downhole imaging instrument then through position at the female end plug core path 47 of upper parts, attachment plug seat 48(and the electrical connection core 121 of corresponding cable head and the lower plug 216 of centralizer 2) arrive public terminal plug center channel 49, complete the connection of electric wiring, and the final camera pipe nipple 3 that arrives is electrically connected with camera 31.
The operating principle that clear water of the present invention suppresses soil resistant formula downhole imaging instrument is set forth below further combined with embodiment.Described downhole imaging instrument is in the process of work, and this cable head 1, centralizer 2, camera pipe nipple 3 are tightly connected in turn between two mutually.And the middle part of above-mentioned parts forms through video camera electrical path and is arranged at the fluid course of electrical path periphery.The cable introduced through cable head 1 and optical fiber finally enter camera pipe nipple 3 through described electrical path, realize being connected with the circuit of camera 31 and signal.Suppressed by ground pumping installations and inject the clear water of capillary tube and finally enter the clear water fluid column chamber 36 of camera pipe nipple 3 front end by aforementioned fluid course and form clear water fluid column, make greasy dirt, impurity etc. can not pollute the quartz glass eyeglass 33 of camera front end under the effect of clear water fluid column, thus reach the object of soil resistant, achieve the function effectively obtaining sharp image in low aqueous well, possess the function that other downhole imaging instrument at present do not possess.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.And it should be noted that, each ingredient of the present invention is not limited in above-mentioned overall applicability, the each technical characteristic described in manual of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the present invention covers other relevant with this case inventive point in the nature of things and combines and embody rule.
Claims (15)
1. a clear water suppresses soil resistant formula downhole imaging instrument, it is characterized in that, described downhole imaging instrument at least comprises the cable head (1), centralizer (2), the camera pipe nipple (3) that are mutually tightly connected successively, and camera (31) is arranged on the front end of described camera pipe nipple (3); Described cable head (1), centralizer (2) form sealing and the circuit path be connected with the middle part of camera pipe nipple (3), and the outside of described circuit path forms the fluid course of sealing; Circuit board is arranged in described circuit path, and is electrically connected with described camera (31) through described circuit path by electric wiring; By the pumping installations of oil well outside, clear water is pumped to the clear water fluid column chamber (36) of described camera pipe nipple (3) front end through described fluid course, and then forms clear water fluid column in described camera (3) front end.
2. clear water as claimed in claim 1 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, described centralizer (2) comprising: an outer tie rod (25) and the inside connecting rod (213) arranged in the inner, described inside connecting rod (213) middle part forms the electric wiring passage (219) that can be connected with described cable head (1) and camera pipe nipple (3) realizing circuit respectively, annular space between described inside connecting rod (213) and outer tie rod (25) forms the centralizer fluid course (220) that can connect with the flow channel of described cable head (1) and camera pipe nipple (3) respectively, two support arm holders (29), can be arranged on outer tie rod (25) along described outer tie rod (25) length direction outside movably, at least four support arm be made up of elastomeric material (212) two ends are connected with described support arm holders (29) respectively, form the lantern-shaped elastic braced structures of evagination.
3. clear water as claimed in claim 2 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, the upper end of described inside connecting rod (213) and outer tie rod (25) is sealedly attached to respectively and can forms with described cable head (1) the centralizer top connection (21) be tightly connected, and the sidewall of described centralizer top connection (21) is provided with the through hole (221) of through described centralizer fluid course (220); The lower end of described outer tie rod (25) is sealedly connected with and can forms with described camera pipe nipple (3) the centralizer lower contact (215) be tightly connected, and the sidewall that described outer tie rod (25) is positioned at described centralizer lower contact (215) is provided with the weep hole (222) of through described centralizer fluid course (220); Described inside connecting rod (213) is positioned at described centralizer lower contact (215) and one end of outstanding described outer tie rod (25) is provided with the lower plug (216) be tightly connected with described camera pipe nipple (3) electric wiring.
4. clear water as claimed in claim 3 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, be respectively equipped with between two described support arm holders (29) and described centralizer top connection (21) and centralizer lower contact (215) and support back-moving spring (26), described outer tie rod (25) is also provided with two centring rings (210), each described centring ring (210) is all arranged on the side of described support arm holders (29) away from described support back-moving spring (26); (29) have a ring groove to described support arm holders, and the bottom of described groove is evenly provided with at least four breach, and the two ends of each described support arm (212) form I-shaped groove, and the width of described I-shaped groove matches with described breach; The two ends of described support arm (212) are embedded in described support arm holders (29) respectively, support arm retainer plate (27) is connected to described support arm holders (29), and one end of described support arm retainer plate (27) is resisted against described support arm (212), described support arm (212), support arm holders (29) are connected as one.
5. clear water as claimed in claim 1 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, described cable head (1) comprises a cable head shell (16) and is arranged on the inner circuit board support (18) of described cable head shell (16), one circuit board containment vessel (17) sealing shroud is located at the outside of described circuit board support (18), and the middle part of described circuit board support (18) is used for the fixing cable head circuit board that can be connected with described centralizer (2) realizing circuit; Annular space between described cable head shell (16) and described circuit board containment vessel (17) forms the first fluid course (170) that can be through with described centralizer fluid course (220); Described cable head shell (16) one end is connected with for introducing and fixing described downhole imaging instrument electrically and a cable head cap (115) of liquid flow lines, one end of described circuit board support (18) is fixedly connected with described cable head cap (115), and in the capillary channel (184) that this end is provided with through optical-fibre channel (183) and can connects with described first fluid course (170), the other end of described circuit board support (18) is provided with the electrical connection core (121) that can be tightly connected with described centralizer (2) realizing circuit.
6. clear water as claimed in claim 5 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, described cable head (1) comprises cable head connecting rod (13) further, described cable head connecting rod (13) two ends are sealedly attached to described cable head shell (16) other end respectively and can realize with described centralizer (2) the cable head lower contact (11) that is tightly connected, the other end of described circuit board support (18) forms connecting rod portion (181) and runs through described cable head connecting rod (13) and extends in described cable head lower contact (11), described electrical connection core (121) is positioned at described connecting rod portion (181) one end of outstanding described cable head connecting rod (13), the connecting rod portion (181) of described circuit board support (18) forms with the annular space between described cable head connecting rod (13) the second fluid course (130) be connected with described first fluid course (170), described cable head connecting rod (13) sidewall being positioned at described cable head lower contact (11) is provided with the fluid outlet (131) of through described second fluid course (130).
7. clear water as claimed in claim 5 suppresses soil resistant formula downhole imaging instrument, and it is characterized in that, described cable head cap (115) is provided with the through channel (1151) of hollow, is provided with circuit fixing device in it; The optical fiber seal that described cable head cap (115) is introduced is fixed on described optical-fibre channel (183), and then is connected with described cable head circuit board; The capillary seal that described cable head cap (115) is introduced is fixed on described capillary channel (184), and then is communicated with described first fluid course (170); The cable that described cable head cap (115) is introduced can seal the described circuit board support of access (18) and be electrically connected with described cable head circuit board.
8. clear water as claimed in claim 7 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, described optical-fibre channel (183) one end is provided with the first bellmouth (1831), the sealing shroud (111) that can match with described first bellmouth (1831) inner surface is embedded with in it, described sealing shroud (111) is quality of rubber materials, optical fiber can enter described optical-fibre channel (183) through described sealing shroud (111), one hold-doun nut (113) being provided with axially extending bore is connected to described optical-fibre channel (183) one end, described hold-doun nut (113) can be resisted against described sealing shroud (111) and seal described optical-fibre channel (183) after incoming fiber optic.
9. clear water as claimed in claim 7 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, described capillary channel (184) one end is provided with the second bellmouth (1841), one group of capillary tube holder (1121) and capillary tube tightening head (1122) that can match with the inner surface of described second bellmouth (1841) is embedded with in it, described capillary tube holder (1121) and capillary tube tightening head (1122) can be formed with the capillary tube penetrated and be fastened and connected, one hold-doun nut (113) being provided with axially extending bore is connected to described capillary channel (184) one end, described capillary tube holder (1121) and capillary tube tightening head (1122) can compress with the cooperation place of described second bellmouth (1841) and be formed and be tightly connected by described hold-doun nut (113).
10. clear water as claimed in claim 7 suppresses soil resistant formula downhole imaging instrument, it is characterized in that, one cable connector (114) is fixed on one end that described circuit board support (18) is connected with described cable head cap (115), through described cable head cap (115) introduce and the cable fixed be fixed on described cable connector (114) further and sealing access described circuit board support (18).
11. clear water as claimed in claim 1 suppress soil resistant formula downhole imaging instrument, it is characterized in that, described camera pipe nipple (3) has a shell (314) and is placed on an inner casing (313) of its inside, and the annular space between described shell (314) and inner casing (313) forms the camera pipe nipple annular space (37) that sealing is communicated with described centralizer fluid course (220); The sealing of described inner casing (313) leading section is provided with glass lens, described camera (31) sealing is arranged at described inner casing (313) leading section and close described glass lens, described camera pipe nipple (3) inner chamber is positioned at side, described glass lens front end and forms described clear water fluid column chamber (36), and described clear water fluid column chamber (36) is communicated with described camera pipe nipple annular space (37); Described inner casing (313) middle part forms the circuit accommodating cavity (38) of the accommodating camera pipe nipple circuit board of energy, and described circuit accommodating cavity (38) sealing is communicated with the electric wiring passage (219) of described centralizer (2); The electric wiring of described downhole imaging instrument is electrically connected with described camera (31) through described camera pipe nipple circuit board.
12. clear water as claimed in claim 11 suppress soil resistant formula downhole imaging instrument, it is characterized in that, described camera pipe nipple (3) has a pressure balance type hermetically-sealed construction (35) further, it is arranged at described inner casing (313) leading section, described pressure balance type hermetically-sealed construction (35) is provided with a camera bracket (319), the rearward end of described camera bracket (319) forms sealing vertically, and the leading section of described camera bracket (319) and the periphery wall of rearward end are connected with described inner casing (313) inner wall sealing; Described glass lens is sealingly fastened in described camera bracket (319) leading section, and described camera (31) is fixed in described camera bracket (319); Seal between described camera bracket (319) and described inner casing (313) and be provided with a rubber tube (316), be positioned at and correspondingly respectively on the described inner casing (313) of described rubber tube (316) both sides and camera bracket (319) be provided with multiple through outer pressure guide hole (317) and pressure guide hole (318); Hydraulic oil is full of in the space of the accommodating described camera (31) of described camera bracket (319).
13. clear water as claimed in claim 11 suppress soil resistant formula downhole imaging instrument, it is characterized in that, it is outside that described inner casing (313) rearward end extends to described shell (314), described inner casing (313) rearward end is provided with a central tube (312) further, described central tube (312) inside is formed and is communicated with the electric wiring passage (219) of described centralizer (2) and the central tube electric path (315) of described circuit accommodating cavity (38), annular space between described central tube (312) and described inner casing (313) forms the central tube annular space (310) being communicated with described centralizer fluid course (220) and described camera pipe nipple annular space (37), seal isolation between described central tube annular space (310) and described circuit accommodating cavity (38), described central tube (312) rearward end is given prominence to described inner casing (313) and is provided with the flow channel interface (311) of through described central tube annular space (37) in this side wall, and the end of the outstanding described inner casing (313) of described central tube (312) and the rearward end of the outstanding described shell (314) of described inner casing (313) form the camera pipe nipple top connection be tightly connected with described centralizer lower contact (215) jointly.
14. clear water as claimed in claim 13 suppress soil resistant formula downhole imaging instrument, it is characterized in that, described inner casing (313) middle part is provided with a bracing frame (34), the rearward end of described bearing support (34) front end and described camera bracket (319) is sealedly and fixedly connected, the rear end of support frame as described above (34) is provided with a circuit board fixed part (320), for fixing described camera pipe nipple circuit board, the rearward end of described circuit board fixed part (320) is connected with described central tube (312).
15. clear water as described in any one of claim 1 to 14 suppress soil resistant formula downhole imaging instrument, it is characterized in that, described downhole imaging instrument comprises at least two described centralizers (2) be mutually tightly connected successively, and by described centralizer top connection (21) and centralizer lower contact (215) fixed seal connection between any two adjacent described centralizers (2), and then seal electric wiring passage (219) and centralizer fluid course (220) described in two described in connection two respectively.
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| CN201310752096.2A CN104747167B (en) | 2013-12-31 | 2013-12-31 | A kind of clear water suppresses soil resistant formula downhole imaging instrument |
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| CN105317422A (en) * | 2015-11-18 | 2016-02-10 | 中石化石油工程技术服务有限公司 | Underground visual probing equipment and method |
| CN109681188A (en) * | 2018-11-02 | 2019-04-26 | 天地科技股份有限公司 | Integrated mining speculum driving means |
| CN109973076A (en) * | 2019-04-10 | 2019-07-05 | 中煤科工集团西安研究院有限公司 | Visual detection device and method in coal mine down-hole drilling |
| CN110620898A (en) * | 2018-06-19 | 2019-12-27 | 武汉理工大学 | Underground television device based on spiral water spraying and optical fiber transmission technology and implementation method |
| CN111021968A (en) * | 2020-01-03 | 2020-04-17 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Downhole television washing tool for core-through coiled tubing and implementation method |
| CN111411901A (en) * | 2020-04-28 | 2020-07-14 | 北京市地质工程勘察院 | Small-caliber shallow groundwater nested monitoring well and well completion method thereof |
| CN116357295A (en) * | 2023-05-23 | 2023-06-30 | 西南石油大学 | Telescopic self-cleaning underground television |
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| CN116357295A (en) * | 2023-05-23 | 2023-06-30 | 西南石油大学 | Telescopic self-cleaning underground television |
| CN116357295B (en) * | 2023-05-23 | 2023-07-28 | 西南石油大学 | Telescopic self-cleaning underground television |
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