CN203396652U - Inner wall detection device for underground casing pipe - Google Patents
Inner wall detection device for underground casing pipe Download PDFInfo
- Publication number
- CN203396652U CN203396652U CN201320479587.XU CN201320479587U CN203396652U CN 203396652 U CN203396652 U CN 203396652U CN 201320479587 U CN201320479587 U CN 201320479587U CN 203396652 U CN203396652 U CN 203396652U
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- CN
- China
- Prior art keywords
- packing element
- rubber barrel
- casing pipe
- pipe
- wall
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an inner wall detection device for an underground casing pipe, which is used for detecting the conditions of the inner wall of an underground casing pipe and can provide a reliable basis for next measures such as casing pipe repair. The device comprises a lead mould which is fixed on the outer surface of a rubber barrel; the two ends of the rubber barrel are connected with a rubber barrel seat; the rubber barrel is arranged outside a central pipe in a sleeved manner; the central pipe is provided with a pressure transmission hole; the inner circle and the outer circle of an upper connector and a lower connector are in threaded connection with the central pipe and the rubber barrel seat respectively. The rubber barrel is hydraulically expanded through the pressure transmission hole of the central pipe, so that the actual conditions of the inner wall of the underground casing pipe can be printed and recorded by the lead mould outside the rubber barrel, the damage or deformation conditions, including longitudinal deformation and fission and radial dislocation, of the inner wall of the casing pipe can be intuitively reflected, the problem that the damage condition of the inner wall of the casing pipe cannot be confirmed is solved, and accurate and reliable information can be provided for a next construction scheme. Therefore, the success rate of casing damage repair in well construction is increased and an effect is remarkable.
Description
Technical field
The utility model relates to the checkout equipment of petroleum industry down-hole casing, and particularly down-hole casing inwall pick-up unit, for detection of the situation of down-hole casing inwall, can be the lower step measures such as casing repairing reliable basis is provided.
Background technology
Down-hole casing is used through for many years, affected by various factors and occurs the problems such as bending, mistake are split, burn into perforation, hinders underground construction, shortens the serviceable life of well.The position that is prone to problem often all occurs in sleeve pipe middle and lower part, and discovery and definite actual state are very difficult.To the detection means of bad break sleeve pipe, be the bottom that the cylindric lead stamp of use is connected to running string at present, the section vestige of parts casing pipe under bad break position be printed on to the lower surface of lead stamp.But the actual states such as the breakage on longitudinal for internal surface of sleeve pipe, burn into perforation never can be confirmed means, the enforcement of impact to the judgement of casing failure and reclamation activities.Production scene is in the urgent need to a kind of pick-up unit that can confirm down-hole casing inwall actual state.
Summary of the invention
The purpose of this utility model is to provide down-hole casing inwall pick-up unit, confirms the actual conditions of down-hole casing inwall by this device, for casing repairing and the lower step working measure of sleeve pipe problem well provides reliable basis.
Technical solution of the present utility model is: down-hole casing inwall pick-up unit comprises lead stamp, lead stamp is fixed on to the outside surface of packing element, and packing element two ends are connected with glue tube base, and packing element is sleeved on to pipe core outside, and pipe core is provided with pressure transmission hole; The inner circle of top connection and lower sub and cylindrical are threaded with pipe core and glue tube base respectively.By the pressure transmission hole hydraulic dilatation packing element of center pit, make lead stamp outside packing element print, record the actual state of down-hole casing inwall.
Compared with prior art, the beneficial effects of the utility model are: this device is connected in the detection tubing string of going into the well, down to cover to be tested, damage Huo Taobian position, by beating hydraulic pressure in oil pipe, make this install inner packing element pressurized expansion, packing element after expansion pushes outer lead stamp and lays the marking to internal surface of sleeve pipe, internal surface of sleeve pipe breakage or deformation can be reflected intuitively, comprises linear deformation, fission and bad break radially.Solved the present situation that internal surface of sleeve pipe cover damage situation cannot be confirmed, the arrangement and method for construction that can be lower step provides information accurately and reliably, thereby improve cover, damages the success ratio of repairing well construction.The utility model is simple in structure, easy to manufacture, and easy construction does not additionally increase construction cost, has significant economic benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the connection diagram of the utility model in tubing string.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, referring to Fig. 1 and Fig. 2, down-hole casing inwall pick-up unit comprises lead stamp 6, lead stamp 6 is fixed on to the outside surface of packing element 5, packing element 5 two ends are connected with glue tube base 3, and packing element 5 is sleeved on to pipe core 7 outsides, and pipe core 7 is provided with pressure transmission hole; The inner circle of top connection 1 and lower sub 9 and cylindrical are threaded with pipe core 7 and glue tube base 3 respectively.Shi great footpath, the middle part section of packing element 5, the path section inner circle that lead stamp 6 is fixed on Gai great Jing Duanshang， two ends is connected with sulfuration fuse 4, to packing element 5, provides protection, the corrosion that the direct impact of minimizing well liquid causes.Pressure transmission hole is arranged on the lower end of pipe core 7, topped filter screen 8 on it, and the flow passage in this pressure transmission hole and lower sub 9 connects, and then connects with the liquid flow cavity at sulfuration fuse 4 two ends.Lead stamp 6 on packing element 5 is at least fixed three, is vertically fixed on packing element 5.In top connection 1 and lower sub 9, be provided with O-ring seal 2 with the junction of glue tube base 3; The top connected pipes of top connection 1, the bottom of lower sub 9 connects centralizer 11, makes lead stamp 6 placed in the middle in the process of going into the well.
During construction, in the detection tubing string of going into the well, connect successively bleeder 10, this pick-up unit, centralizer 11 and end screen blinding 12 from top to bottom.The effect of packing element 5 is to expand outwardly after pressurized, and extruding lead stamp 6 is firmly adjacent to internal surface of sleeve pipe, is with again lead stamp 6 to return to original position after release.Lead stamp 6 is fixed on packing element 5, is subject to the pressure after packing element 5 expansions to be adjacent to internal surface of sleeve pipe, after compressive deformation, the situation of internal surface of sleeve pipe can be portrayed out.The hardness of lead stamp 6 is less, but more much bigger than the hardness of packing element 5.This device is lowered to Hou， ground, predetermined detection position and beats hydraulic pressure, and the single current valve seat of end screen blinding 12 is tight.Continue to beat hydraulic pressure.Pressure transmission hole and the filter screen 8 of highly pressurised liquid on this device pipe core 7 enters the flow passage in lower sub 9, from the liquid flow cavity at sulfuration fuse 4 two ends, flow into the gap between pipe core 7 and packing element 5 again, make to have suppressed high pressure in packing element 5, packing element 5 pressurizeds expand outwardly rear promotion lead stamp 6 and are firmly adjacent to internal surface of sleeve pipe, lead stamp 6 extrusions that quality is softer, are printed on lead by the breakage of internal surface of sleeve pipe or deformation and touch on 6.Printing completes the termination of pumping release of Hou， ground, thereby discharges the pressure in device, makes oil jacket pressure equilibrium, and packing element 5 is retracted because internal pressure discharges, and lead stamp 6 is also got back to original position with packing element 5.The lead stamp 6 of compressive deformation records the actual state of internal surface of sleeve pipe remain.
This device can once only be lowered to one, also can coordinate to be once connected with bleeder 10 subsurface tools such as grade to be lowered to a plurality ofly, realizes multistage printing.
Claims (5)
1. down-hole casing inwall pick-up unit, comprises lead stamp, it is characterized in that, lead stamp is fixed on to the outside surface of packing element, and packing element two ends are connected with glue tube base, and packing element is sleeved on to pipe core outside, and pipe core is provided with pressure transmission hole; The inner circle of top connection and lower sub and cylindrical are threaded with pipe core and glue tube base respectively.
2. down-hole casing inwall pick-up unit according to claim 1, is characterized in that, Shi great footpath, the middle part section of described packing element, and the path section inner circle that lead stamp is fixed on Gai great Jing Duanshang， two ends is connected with sulfuration fuse.
3. down-hole casing inwall pick-up unit according to claim 1 and 2, it is characterized in that, described pressure transmission hole is arranged on the lower end of pipe core, topped filter screen on it, flow passage in this pressure transmission hole and lower sub connects, and then connects with the liquid flow cavity at sulfuration fuse two ends.
4. down-hole casing inwall pick-up unit according to claim 1 and 2, is characterized in that, the lead stamp on described packing element is at least fixed three, is vertically fixed on packing element.
5. down-hole casing inwall pick-up unit according to claim 1, is characterized in that, the described junction at top connection and lower sub and glue tube base is provided with O-ring seal; The top connected pipes of top connection, the bottom of lower sub connects centralizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320479587.XU CN203396652U (en) | 2013-08-07 | 2013-08-07 | Inner wall detection device for underground casing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320479587.XU CN203396652U (en) | 2013-08-07 | 2013-08-07 | Inner wall detection device for underground casing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203396652U true CN203396652U (en) | 2014-01-15 |
Family
ID=49908176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320479587.XU Expired - Fee Related CN203396652U (en) | 2013-08-07 | 2013-08-07 | Inner wall detection device for underground casing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203396652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178946A (en) * | 2015-06-26 | 2015-12-23 | 中国石油天然气股份有限公司 | Storage type diameter-variable on-one-trip multi-change-point casing examining method |
-
2013
- 2013-08-07 CN CN201320479587.XU patent/CN203396652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178946A (en) * | 2015-06-26 | 2015-12-23 | 中国石油天然气股份有限公司 | Storage type diameter-variable on-one-trip multi-change-point casing examining method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20140807 |
|
| EXPY | Termination of patent right or utility model |