CN1030936C - Emergent withdrawing device for push close-set unit of formation tester - Google Patents
Emergent withdrawing device for push close-set unit of formation tester Download PDFInfo
- Publication number
- CN1030936C CN1030936C CN 92103190 CN92103190A CN1030936C CN 1030936 C CN1030936 C CN 1030936C CN 92103190 CN92103190 CN 92103190 CN 92103190 A CN92103190 A CN 92103190A CN 1030936 C CN1030936 C CN 1030936C
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- low
- valve
- pressure chamber
- pressure
- feeler
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- Expired - Fee Related
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Abstract
The present invention relates to an emergency retracting device for a sidewall contact device of a formation tester, which is formed by improving an original formation tester. An original emergency release valve which is eliminated from an oil supply passage is arranged on an oil return passage, and a two-position triple valve and a low-pressure chamber are arranged on the oil supply passage, and thus, when a hydraulic pump or a reversing valve is damaged, power supplies of the two-position triple valve and the low-pressure chamber are switched on, and pressure difference can be formed on both ends of a detecting rod of the sidewall contact device by pressure difference between the pressure of a mud column and normal pressure of the low-pressure chamber, and be used as dynamic force to quickly retract the detecting rod.
Description
A kind of emergent withdrawing device for push close-set unit of formation tester is applied to oil well logging industry; Belong to hydraulic machine group in the big class of mechanical engineering;
Drilling well is the indispensable operation of recover petroleum, and well logging is the indispensable operation of recover petroleum too, by well logging, the thickness of down-hole oil reservoir as can be known, every data such as in-place permeability, formation tester is exactly a kind of in this quasi-instrument, its measuring method is that formation tester is put into the down-hole, arrives the scheduled measurement position, comes hydraulic systems under the control well by cable circuit, the feeler of instrument is tightly withstood on the borehole wall, to measure every data of this section well depth.But this instrument opens circuit if generating pump or reversal valve damage or control the cable of this hydraulic system when the down-hole, and owing to feeler tightly withstands on the borehole wall, so instrument can not be recovered to aboveground.Usually the instrument of well logging usefulness is very expensive, as abandons, and then loss is too big, salvages as punching, and its expense is also very big, and instrument is fragile.For this reason, former designer adds a urgent relief valve in the hydraulic circuit of control feeler, in order to when the feeler hydraulic system is out of hand, this valve can discharge the hydraulic coupling in the hydraulic system in the feeler that tightly withstands on the borehole wall, so that instrument is put on, but because the borehole wall is not very smooth, probe also is immersed in the mud, probe is a power that makes its retraction not, therefore depending merely on wall collisions also is nowhere near the feeler recovery, feeler is got back under still can not lossless case aboveground, and in reality, the effect of urgent relief valve can't be played the effect of retraction feeler.
The purpose of this invention is to provide a kind of device that feeler initiatively can be retracted to original position.
The present invention is following realization: well-known, and oil drilling, well depth is more than several kms, liquid has very high pressure in the well, for preventing that liquid does not have control to aboveground ejection in the well, usually in drilling well, in well, inject mud, to keep the borehole pressure balance.Formation tester is a situation under the detecting shaft, need slip into the down-hole of filling with mud.When surveying the borehole wall, feeler tightly withstands on the borehole wall by the hydraulic pressure that the hydraulic pump in the tester applies, this moment is because telescoping ram has mud column pressure outward, and the non-fuel feeding side of hydraulic pump fuel tank has a pressure balance piston, thereby reaction all the time is mud column pressure in the fuel tank, therefore, can not consider the pressure of mud column and survey.After detection finishes, utilize reversal valve commutation in the hydraulic system, as power, make the feeler retraction, again tester is mentioned aboveground with hydraulic pressure.But when hydraulic pump or reversal valve damage in the down-hole can't work the time, tester loses the hydraulic power of retraction, thereby can't bounce back.The present invention utilizes the pressure of down-hole slurry post promptly to bounce back.Its specific practice is: emergent withdrawing device for push close-set unit of formation tester mainly is made up of hydraulic pump, reversal valve, two guide valve, urgent relief valve, telescoping ram, feeler; A two position three-way valve and a low-pressure chamber are set on the fuel feeding path of the present invention in the hydraulic system of probe.Two position three-way valve and join with low-pressure chamber is provided with a urgent relief valve on way to cycle oil; Low-pressure chamber is a sealed hollow.When operate as normal, oil feed line is released feeler by two position three-way valve and is withstood on the borehole wall in the hydraulic system, and urgent relief valve is a closed condition, and low-pressure chamber also is closed state.During retraction,, feeler is bounced back under hydraulic power by the reversal valve commutation.When contingency occurring, when hydraulic pump or reversal valve are ineffective, connect the power supply of urgent relief valve and two position three-way valve, the fluid pressure line way to cycle oil is reacted all the time be mud column pressure, the two position three-way valve commutation, the fuel feeding path communicates with low-pressure chamber, owing to be aboveground normal pressure originally in the low-pressure chamber, and feeler places the down-hole, has very high mud column pressure around it.Mud column pressure will promote the feeler retraction in this well, and the hydraulic oil in the hydraulic system is compressed in the low-pressure chamber, thereby can make feeler retract to original position, has played the effect of urgent retraction.
Adopt this urgent restoring device, seldom under the part, the down-hole feeler is being lost under the hydraulic power situation, utilize the down-hole slurry column pressure to bounce back, avoid instrument to be destroyed in the down-hole in former instrument increase, easy during use, reliable.Small investment.
The invention will be further described below in conjunction with accompanying drawing;
Fig. 1 is original hydraulic scheme:
Wherein: 1, hydraulic pump; 2, reversal valve; 3, urgent relief valve; 4, telescoping ram; 5, telescoping ram; 6, feeler; 7, telescoping ram; 8, feeler; 9, feeler;
Fig. 2 is an emergent withdrawing device for push close-set unit of formation tester hydraulic scheme of the present invention;
Wherein: 10, double-deck to valve; 11, low-pressure chamber; 12, two position three-way valve;
Fig. 3 is a low-pressure chamber front view of the present invention;
Wherein: 13, fuel feed hole;
Fig. 4 places the space schematic diagram of two position three-way valve for the present invention;
The two position three-way valve that Fig. 5 sets up for the present invention, the drawing of site of the space of low-pressure chamber on the stratum detecting device;
Wherein: 14, hydraulic power system; 15, low-pressure chamber part; 16, two-position three way valve portion; 17, telescoping ram part;
As shown in Figure 1, feeler is realized stretching through reversal valve, two guide valve by hydraulic coupling that hydraulic pump provided in original probe, wherein: in the middle of two guide valves is piston, piston is upper and lower respectively a thimble, withstand on upper and lower two valve balls, when to piston upside fuel feeding, oil pressure will be pushed the upside valve ball open and make its conducting, the while oil pressure also promotes piston and moves down, and thimble will be pushed lower valve ball open and make the way to cycle oil conducting under the piston.Vice versa.Urgent relief valve is positioned on the fuel feeding path.In the existing hydraulic system the urgent relief valve on the fuel feeding path is removed, be put on the way to cycle oil, and the low-pressure chamber of a two position three-way valve and a sealing is set on the fuel feeding path, wherein: low-pressure chamber is straight-tube shape, its center is a tubular passageway, in order to place cable etc., between the tubular passageway outside and barrel inboard, form enclosed cavity, this enclosed cavity is the low pressure cavity, and three through holes are arranged on the cavity, is positioned at the oil-feed that is used for of end face, two through holes that are positioned on the outer wall are closed usually in addition, in cavity, fill with oil mention aboveground after, a hole is used to drain the oil, another hole is used to into air.Low pressure valve and two position three-way valve join.During operate as normal, low-pressure chamber is independent closed state, after feeler withstands on the borehole wall, if hydraulic pump or reversal valve occurring damages in the time of can't working, urgent relief valve and two position three-way valve circuit are connected, make the hydraulic oil-returning path be always mud column pressure, the two position three-way valve commutation, the hydraulic oil path that connects feeler communicates with low-pressure chamber, normal pressure in mud column pressure on the feeler way to cycle oil and the low-pressure chamber forms pressure differential at telescoping ram feeler two ends, with this pressure differential is power, and feeler is bounced back rapidly.
Claims (1)
1. an emergent withdrawing device for push close-set unit of formation tester mainly is made up of hydraulic pump, reversal valve, two guide valve, urgent relief valve, telescoping ram, feeler; Emergent withdrawing device for push close-set unit of formation tester is characterized in that: a two position three-way valve and a low-pressure chamber are set on the fuel feeding path in the hydraulic system of probe, two position three-way valve and join with low-pressure chamber is provided with a urgent relief valve on way to cycle oil; Low-pressure chamber is a sealed hollow; Low-pressure chamber is straight-tube shape, and its center is a tubular passageway, forms enclosed cavity between the tubular passageway outside and barrel inboard, and three through holes are arranged on the cavity, is positioned at the oil-feed that is used for of end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103190 CN1030936C (en) | 1992-05-14 | 1992-05-14 | Emergent withdrawing device for push close-set unit of formation tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92103190 CN1030936C (en) | 1992-05-14 | 1992-05-14 | Emergent withdrawing device for push close-set unit of formation tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1078534A CN1078534A (en) | 1993-11-17 |
| CN1030936C true CN1030936C (en) | 1996-02-07 |
Family
ID=4940070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92103190 Expired - Fee Related CN1030936C (en) | 1992-05-14 | 1992-05-14 | Emergent withdrawing device for push close-set unit of formation tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030936C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100356073C (en) * | 2006-02-09 | 2007-12-19 | 中国石油天然气集团公司 | Eccentering arm hydraulic loop device for through-casing resistivity logging instrument for petroleum well |
| CN102400681B (en) * | 2011-12-29 | 2015-03-11 | 中国海洋石油总公司 | Pushing and setting testing device of formation tester |
-
1992
- 1992-05-14 CN CN 92103190 patent/CN1030936C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1078534A (en) | 1993-11-17 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |