CN204703789U - A kind of self-adapting type underground hydraulic pressure centralizer - Google Patents
A kind of self-adapting type underground hydraulic pressure centralizer Download PDFInfo
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- CN204703789U CN204703789U CN201520271943.8U CN201520271943U CN204703789U CN 204703789 U CN204703789 U CN 204703789U CN 201520271943 U CN201520271943 U CN 201520271943U CN 204703789 U CN204703789 U CN 204703789U
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- hydraulic pressure
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Abstract
The utility model discloses a kind of self adaptation underground hydraulic pressure centralizer, comprise the top connection and lower contact that are connected by mandrel, be provided with the hydraulic centralizing actuating unit connected and composed by hydrodynamic body and spring mechanism between upper lower contact, hydraulic centralizing actuating unit connects righting arm and forms hydraulic centralizing device.Hydraulic centralizing actuating unit comprises the compensating cylinder be socketed on mandrel, compensating cylinder upper end is provided with end cap, the hydraulic cylinder that lower end is provided with dummy piston successively, fuel tank is communicated with by valve body, below hydraulic cylinder by pin hinges at liquid righting arm, righting arm upper end arc surface withstands on piston end surface.The utility model oiling in hydraulic cylinder, fuel tank, well liquid enters compensating cylinder, and righting arm tightens up and promotes piston in hydraulic cylinder compression hydraulic oil; During casing diameter change, uprighting force is made to remain on setting value by the balance of oil in unloader switch hydraulic cylinder.This centralizer uprighting force is not by the impact of casing diameter variable, and its uprighting force is stable, good by property, thus improves the success rate of well logging.
Description
Technical field
The utility model relates to a kind of down-hole and assists logging tool, particularly relates to a kind of self-adapting type underground hydraulic pressure centralizer.
Background technology
Along with the development of ocean and land horizontal well drilling and production technology, the centralizer applied in horizontal well and high-angle borehole logging is also more and more extensive, and for vertical shaft, the requirement for uprighting force is also more and more higher.The general uprighting force of the centralizer (see Fig. 1) applied in vertical shaft is smaller, if the centralizer in vertical shaft is applied to horizontal well (see Fig. 2), due to the impact by instrument deadweight, the requirement of stability placed in the middle to instrument righting in horizontal well cannot be met.The uprighting force of the centralizer in vertical shaft is generally provided (see Fig. 3) by spring, want to improve uprighting force, then must improve the power output of spring, due to the restriction by structure space and spring manufacturing process, requirement to uprighting force when the power output of spring can not meet large instrument well logging in high angle hole and horizontal well sometimes, need a kind of new structure to break through this limitation, for centralizer improves larger uprighting force.Fluid pressure type centralizer mainly provides uprighting force with fluid pressure, and spring mainly plays reset role, and namely breaches above-mentioned limitation.
The centralizer of spring is when casing diameter variable, and uprighting force increases along with diminishing of casing diameter, and resistance when logger is gone into the well increases, and reduces the property passed through that instrument is gone into the well.
Utility model content
The purpose of this utility model is to provide a kind of self adaptation underground hydraulic pressure centralizer, by hydraulic coupling for centralizer provides larger uprighting force.This centralizer uprighting force is not by the impact of casing diameter variable, and its uprighting force is stable, good by property, thus improves the success rate of well logging.
The purpose of this utility model is realized by following technical proposals.
A kind of self adaptation underground hydraulic pressure centralizer, comprise the top connection and lower contact that are connected by mandrel, be provided with the hydraulic centralizing actuating unit connected and composed by hydrodynamic body and spring mechanism between described top connection and lower contact, hydraulic centralizing actuating unit connects righting arm and forms hydraulic centralizing device.
Preferably, described hydraulic centralizing actuating unit comprises the compensating cylinder be socketed on mandrel, compensating cylinder upper end is provided with end cap, the hydraulic cylinder that lower end is provided with dummy piston successively, fuel tank is communicated with by valve body, by pin hinges righting arm below hydraulic cylinder body, righting arm upper end arc surface withstands on piston end surface.
Preferably, the mandrel of described compensating cylinder socket is provided with spring.
Preferably, described dummy piston is provided with overflow valve, and overflow valve is one way valve, is located between compensating cylinder and fuel tank.
Preferably, be marked with hydraulic oil in described fuel tank, fuel tank is respectively equipped with plug screw; Fuel tank is communicated with hydraulic cylinder respectively by unloader with oil sucting valve, and unloader is one way valve.
Preferably, be marked with hydraulic oil in described hydraulic cylinder, the mandrel of hydraulic cylinder socket is provided with back-moving spring, and hydraulic cylinder is provided with plug screw II.
Preferably, oil-filled by the oil-filled hole of plug screw III, be vented by plug screw II steam vent.
Preferably, described end cap is provided with sand control filter screen.
Preferably, the righting arm of described centralizer is roller type or shell fragment.
The uprighting force of the utility model self-adapting type hydraulic centralizing device is not subject to the impact of casing diameter variable, the uprighting force that can keep relative stability substantially, thus improves the property passed through when instrument is gone into the well.Especially in high angle hole and horizontal wellbore logging, utilize in recent years well operations under crawl device conveying well measuring instrument more and more, use the auxiliary well logging of self-adapting type hydraulic centralizing device, because its uprighting force is stable, good by property, thus improve the success rate of well logging.
Feature of the present utility model is:
1) when centralizer enters casing centering, righting arm tightens up, and expanded diameter diminishes, and by leverage, promote the piston in hydraulic cylinder, the hydraulic oil in compression hydraulic cylinder, oil pressure increases, for centralizer provides uprighting force.
2) when casing diameter changes, the oil pressure in hydraulic cylinder increases or reduces, and is discharged or repairing by the oil in hydraulic cylinder by unloader and oil sucting valve, promotes dummy piston and resets, make uprighting force remain on setting value by oil pressure by spring.
3) when casing diameter is unchanged, unloader and oil sucting valve are all closed, and maintenance uprighting force is setting value.
4) when downhole temperature raises, oil in hydraulic cylinder expands, pressure increases, when pressure exceedes the opening pressure of unloader, unloader is opened, and oil unnecessary in hydraulic cylinder flows into fuel tank, when the oil pressure in fuel tank is increased to the opening pressure of overflow valve, overflow valve is opened, and oil unnecessary in fuel tank flows in compensating cylinder.When the oil in fuel tank reduces, spring promotes dummy piston and resets.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that centralizer is applied in the shaft.
Fig. 2 is the schematic diagram that centralizer is applied in horizontal well.
Fig. 3 is a kind of structural representation of vertical shaft centralizer.
Fig. 4 is the structural representation of the self-adapting type hydraulic centralizing device involved by the utility model.
Fig. 5 is the self-adapting type hydraulic centralizing general ability portion fundamental diagram involved by the utility model.
In Fig. 3-4: 1-top connection, 2-uprighting force provides part, 3-spring, 4-spring strut, 5-pressure cylinder, 6-pin, 7-righting arm, 8-mandrel, 9-lower contact.
In Fig. 5: 2-1-end cap, 2-2-compensating cylinder, 2-3-spring, 2-4-dummy piston, 2-5-overflow valve, 2-6-fuel tank, 2-7-plug screw I, 2-8-unloader, 2-9-plug screw II, 2-10-hydraulic cylinder, 2-11-back-moving spring, 2-12-piston, 2-13-hydraulic oil, 2-14-oil sucting valve, 2-15-plug screw III, 2-16-sand control filter screen.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described further.
When self-adapting type underground hydraulic pressure centralizer involved by the utility model enters casing centering, righting arm tightens up, and expanded diameter diminishes, by leverage, promote the piston in hydraulic cylinder, the hydraulic oil in compression hydraulic cylinder, oil pressure increases, for centralizer provides uprighting force.Spring mainly plays reset role.
Fig. 3 is a kind of vertical shaft centralizer structure schematic diagram, connect top connection 1 and lower contact 9 by mandrel 8, wherein, uprighting force provides part 2 to be made up of the spring mechanism connection righting arm 7 be located on mandrel 8, the shell that spring mechanism comprises end cap, spring strut 4 is formed, establishes spring 3, pressure cylinder 5 in shell.The uprighting force of righting arm is provided by spring force.
As shown in Figure 4, hydraulic centralizing device under a kind of self-adapting type oil well of the utility model, comprises the top connection 1 and lower contact 9 that are connected by mandrel 8, and uprighting force provides part to be connected righting arm 7 by the hydrodynamic body be located on mandrel 8 with spring mechanism to form.The uprighting force of centralizer provides primarily of fluid pressure, and spring mechanism mainly plays reset role.
As shown in Figure 5, described hydrodynamic body and spring mechanism comprise the compensating cylinder 2-2 be socketed on mandrel 8, compensating cylinder 2-2 upper end is provided with end cap 2-1, lower end is provided with the hydraulic cylinder 2-10 that dummy piston 2-4, fuel tank 2-6 are communicated with by valve body successively, piston 2-12 below hydraulic cylinder 2-10 is by the hinged righting arm 7 of pin 6, righting arm 7 upper end arc surface withstands on piston end surface, and overflow valve 2-5 is one way valve, is located between compensating cylinder 2-2 and fuel tank 2-6.Wherein, the mandrel 8 that compensating cylinder 2-2 is socketed is provided with spring 2-3; Dummy piston 2-4 is provided with overflow valve 2-5; Be marked with hydraulic oil 2-13 in fuel tank 2-6, fuel tank 2-6 be respectively equipped with plug screw I 2-7 and plug screw III 2-15; Fuel tank 2-6 is communicated with hydraulic cylinder 2-10 respectively by unloader 2-8 with oil sucting valve 2-14, unloader 2-8 is one way valve, be marked with hydraulic oil 2-13 in hydraulic cylinder 2-10, the mandrel 8 that hydraulic cylinder 2-10 is socketed is provided with back-moving spring 2-11, and hydraulic cylinder 2-10 is provided with plug screw II 2-9.End cap 2-1 is provided with sand control filter screen 2-16.
The righting arm of this centralizer can be roller type, also can make shell fragment etc. other forms of.
The unloader 2-8 that this utility model comprises, oil sucting valve 2-14, overflow valve 2-5, or the valve that function is identical.
This utility model comprises pressure balancing piston, when underground work in order to the pressure at dummy piston two ends.
This utility model is oil-filled by the oil-filled hole of plug screw III 2-15, is vented by plug screw II 2-9 steam vent.
Oil-filled hole and steam vent plug screw add O type rubber seal rings for seal, also can seal by other forms.
Fig. 4 is the structural representation of self-adapting type underground hydraulic pressure centralizer, is upper and lower symmetrical structure.Fig. 5 is the fundamental diagram of the interior part of square frame of Fig. 4.The operating principle of self-adapting type underground hydraulic pressure centralizer is hereafter described with Fig. 5.Back out plug screw III 2-15, oiling in the oil dropping apparatus 2-6 of this hole, oil enters hydraulic cylinder 2-10 by oil sucting valve 2-14.Open plug screw II 2-9 to be vented, in time having oil to overflow from this hole, tighten plug screw II 2-9, continue oiling in oil dropping apparatus 2-6, until oil overflows from unloader 2-8, enter fuel tank 2-6.Open plug screw I 2-7 to be vented, continue oiling until oil overflows from plug screw I 2-7 hole, tighten plug screw I 2-7, continue oiling until oil overflows from overflow valve 2-5, stop oiling, tighten plug screw III 2-15.Centralizer go into the well work time, well liquid enters compensating cylinder 2-2 from sand control filter screen 2-16, makes dummy piston 2-4 pressure at two ends reach balance.
When the righting arm 7 of centralizer tightens up, righting arm rotates around pin 6, and expanded diameter diminishes, and by leverage, promote the piston 2-12 in hydraulic cylinder, the hydraulic oil 2-13 in compression hydraulic cylinder, oil pressure increases, for centralizer provides uprighting force.
When casing diameter diminishes, oil pressure in hydraulic cylinder 2-10 increases, in hydraulic cylinder 2-10, pressure is greater than the pressure in fuel tank 2-6, and pressure reduction is when being greater than the opening pressure of unloader 2-8, unloader 2-8 opens, and oil sucting valve 2-17 keeps closing simultaneously, is discharged by oil unnecessary in hydraulic cylinder 2-10, oil pressure reduces, and uprighting force is reduced to setting value.In like manner, when casing diameter becomes large, righting arm 7 opens, back-moving spring 2-11 promotes piston 2-12 and resets, and the oil pressure in hydraulic cylinder 2-10 reduces, and unloader 2-8 keeps closing, oil sucting valve 2-14 opens, hydraulic oil 2-13 is repairing in trend hydraulic cylinder 2-10 in fuel tank 2-6, and in hydraulic cylinder 2-10, oil pressure raises, and uprighting force is increased to setting value.Oil in fuel tank 2-6 reduces, and spring 2-3 promotes dummy piston 2-4 and resets.When casing diameter is unchanged, unloader 2-8 and oil sucting valve 2-14 all closes, and maintenance uprighting force is setting value.
When downhole temperature raises, oily expanded by heating in hydraulic cylinder 2-10, oil pressure increases, and when pressure exceedes the opening pressure of unloader 2-8, unloader 2-8 opens, oil unnecessary in hydraulic cylinder flows into fuel tank 2-6, when the pressure in fuel tank 2-6 is greater than the pressure of dummy piston 2-4 left end well liquid, and when pressure reduction is greater than the opening pressure of overflow valve 2-5, when oil pressure is increased to the opening pressure of overflow valve 2-5, overflow valve 2-5 opens, and oil unnecessary in fuel tank 2-6 flows in compensating cylinder 2-2.Compensating cylinder 2-2 is led to by sand control filter screen 2-16 and well liquid phase.
The above; it is only the utility model self adaptation underground hydraulic pressure centralizer embodiment; above-described embodiment not does any restriction to the utility model; every scope given by technical solutions of the utility model and to any simple modification made for any of the above embodiments, change and equivalent structure change, all still belongs to the protection domain of technical solutions of the utility model.
Claims (9)
1. a self adaptation underground hydraulic pressure centralizer, comprise the top connection (1) and lower contact (9) that are connected by mandrel (8), it is characterized in that: be provided with the hydraulic centralizing actuating unit connected and composed by hydrodynamic body and spring mechanism between described top connection (1) and lower contact (9), hydraulic centralizing actuating unit connects righting arm (7) and forms hydraulic centralizing device.
2. a kind of self adaptation underground hydraulic pressure centralizer according to claim 1, it is characterized in that: described hydraulic centralizing actuating unit comprises the compensating cylinder (2-2) be socketed on mandrel (8), compensating cylinder (2-2) upper end is provided with end cap (2-1), the hydraulic cylinder (2-10) that lower end is provided with dummy piston (2-4) successively, fuel tank (2-6) is communicated with by valve body, by pin hinges righting arm (7) below hydraulic cylinder (2-10) cylinder body, righting arm (7) upper end arc surface withstands on piston end surface.
3. a kind of self adaptation underground hydraulic pressure centralizer according to claim 2, is characterized in that: the mandrel (8) that described compensating cylinder (2-2) is socketed is provided with spring (2-3).
4. a kind of self adaptation underground hydraulic pressure centralizer according to claim 2, it is characterized in that: described dummy piston (2-4) is provided with overflow valve (2-5), overflow valve (2-5) is one way valve, is located between compensating cylinder (2-2) and fuel tank (2-6).
5. a kind of self adaptation underground hydraulic pressure centralizer according to claim 2, it is characterized in that: in described fuel tank (2-6), be marked with hydraulic oil (2-13), fuel tank (2-6) is respectively equipped with plug screw I (2-7) and plug screw III (2-15); Fuel tank (2-6) is communicated with hydraulic cylinder (2-10) respectively by unloader (2-8) with oil sucting valve (2-14), and unloader (2-8) is one way valve.
6. a kind of self adaptation underground hydraulic pressure centralizer according to claim 2, it is characterized in that: in described hydraulic cylinder (2-10), be marked with hydraulic oil (2-13), the mandrel (8) that hydraulic cylinder (2-10) is socketed is provided with back-moving spring (2-11), and hydraulic cylinder (2-10) is provided with plug screw II (2-9).
7. a kind of self adaptation underground hydraulic pressure centralizer according to claim 5 or 6, is characterized in that: oil-filled by plug screw III (2-15) oil-filled hole, is vented by plug screw II (2-9) steam vent.
8. a kind of self adaptation underground hydraulic pressure centralizer according to claim 2, is characterized in that: described end cap (2-1) is provided with sand control filter screen (2-16).
9. a kind of self adaptation underground hydraulic pressure centralizer according to claim 1, is characterized in that: the righting arm of described centralizer is roller type or shell fragment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520271943.8U CN204703789U (en) | 2015-04-29 | 2015-04-29 | A kind of self-adapting type underground hydraulic pressure centralizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520271943.8U CN204703789U (en) | 2015-04-29 | 2015-04-29 | A kind of self-adapting type underground hydraulic pressure centralizer |
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| Publication Number | Publication Date |
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| CN204703789U true CN204703789U (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520271943.8U Expired - Fee Related CN204703789U (en) | 2015-04-29 | 2015-04-29 | A kind of self-adapting type underground hydraulic pressure centralizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832113A (en) * | 2015-04-29 | 2015-08-12 | 西安威盛电子科技股份有限公司 | Self-adaptive down-hole hydraulic centering device and centering method thereof |
-
2015
- 2015-04-29 CN CN201520271943.8U patent/CN204703789U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832113A (en) * | 2015-04-29 | 2015-08-12 | 西安威盛电子科技股份有限公司 | Self-adaptive down-hole hydraulic centering device and centering method thereof |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20151014 Termination date: 20170429 |
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| CF01 | Termination of patent right due to non-payment of annual fee |