CN103334895B - A kind of high-pressure fluid pump of underground formation tester - Google Patents
A kind of high-pressure fluid pump of underground formation tester Download PDFInfo
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- CN103334895B CN103334895B CN201310301228.XA CN201310301228A CN103334895B CN 103334895 B CN103334895 B CN 103334895B CN 201310301228 A CN201310301228 A CN 201310301228A CN 103334895 B CN103334895 B CN 103334895B
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Abstract
The invention discloses a kind of high-pressure fluid pump of underground formation tester, overcome the deficiency that pressure measurement is carried out on stratum that current Downhole Formation Tester fluid pump is not suitable for low-permeability, in this high pressure fluid pump: the outwardly one-tenth step in middle part of king-rod, step is first end near the side of top connector, is the second end near bottom fitting; Upper pump barrel stuffing box gland is on the outer surface of king-rod first end; Lower pump barrel stuffing box gland is on the outer surface of king-rod second end; Middle pump barrel is enclosed within stepped outer surface hermetically; The first end of middle pump barrel is connected with the second end of upper pump barrel, and the second end is connected with the first end of lower pump barrel; The first end of upper pump barrel is towards top connector, and lower pump barrel second end is connected with the first end of bottom fitting; Displacement transducer is connected to the second end of bottom fitting; King-rod can move towards bottom fitting or top connector.The high pressure fluid pump of the embodiment of the present application can be taken out by lowspeed pump, is applicable to low permeability formation pressure measurement, effectively improves the piezo-effect of low permeability formation.
Description
Technical field
The present invention relates to wireline logging field, especially relate to a kind of high-pressure fluid pump of underground formation tester.
Background technique
The instrument internal of existing cable formation tester has fluid pump, can carry out real-time pump take out formation fluid downhole, thus measures strata pressure according to pressure recover situation or directly obtain fluid sample.For high permeability formation, it is little that resistance taken out by pump, takes out pressure and pump speed is less demanding to pump.And for tight formation, need higher pump pressure when pump is taken out, and pump speed needs corresponding reduction, so just neither can destroy stratum reset condition, can take out again earthing layer, obtains real strata pressure.
When obtaining formation fluid sample, also needing to carry out supercharging by fluid pump to the fluid of specimen chamber, fluid recovery can be avoided like this to change to phase during ground, guaranteeing the reset condition of analyzed fluid sample closest to stratum.And when formation fluid carries out gastight sampling, fluid pump supercharging is larger, and fluid phase state is more stable.
The pump pressure of existing fluid pump is lower, is not suitable for tight formation pressure measurement, after ground is mentioned in sampling, may cause downhole fluid phase-state change due to pump pressure lower than bubble point pressure.And when existing fluid pump carries out pressure measurement to tight formation, because pump speed is excessive and regulation range is limited, test effect is poor.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiency that pressure measurement is carried out on stratum that current Downhole Formation Tester fluid pump is not suitable for low-permeability.
In order to solve the problems of the technologies described above, the invention provides a kind of high-pressure fluid pump of underground formation tester, comprise top connector (1), upper pump barrel (2), king-rod (3), middle pump barrel (4), lower pump barrel (5), bottom fitting (6) and displacement transducer (7), wherein:
The outwardly one-tenth step (31) in middle part of described king-rod (3), described step (31) is first end near the side of described top connector (1), is the second end near bottom fitting (6); Described upper pump barrel (2) stuffing box gland is on the outer surface of described king-rod (3) first end; Described lower pump barrel (5) stuffing box gland is on the outer surface of described king-rod (3) second end; Described middle pump barrel (4) is enclosed within described step (31) outer surface hermetically; The first end of described middle pump barrel (4) is connected with the second end of described upper pump barrel (2), and the second end is connected with the first end of described lower pump barrel (5); The first end of described upper pump barrel (2) is towards described top connector (1), and described lower pump barrel (5) second end is connected with the first end of described bottom fitting (6); Institute's displacement sensors (7) is connected to the second end of described bottom fitting (6); Described king-rod (3) can move towards described bottom fitting (6) or top connector (1).
Preferably, described top connector (1) is inserted in the inside of described upper pump barrel (2), and is fixedly connected with described upper pump barrel (2).
Preferably, the sensor bar (71) of institute's displacement sensors (7) is arranged in the center hole of described lower pump barrel (5) and the central blind hole of described king-rod (3).
Preferably, when described king-rod (3) is mobile towards described bottom fitting (6), second end of described upper pump barrel (2) and described step (31) can form the first cavity towards the First terrace of top connector (1) side, and the center hole of described upper pump barrel (2) can form the 3rd cavity between described king-rod (3) first end and described upper pump barrel (2) first end;
When described king-rod (3) is mobile towards described top connector (1), the first end of described lower pump barrel (5) and described step (31) can form the second cavity (22) towards the second step face of bottom fitting (6) side, and the center hole of described lower pump barrel (5) can form the 4th cavity (24) between described king-rod (3) second end and described lower pump barrel (5) second end.
Preferably, the wall of described king-rod (3) is provided with first through hole corresponding with described first cavity, second through hole corresponding with described second cavity (22); The wall of described upper pump barrel (2) is provided with the third through-hole with described 3rd cavity connects; The wall of described lower pump barrel (5) is provided with the fourth hole be communicated with described 4th cavity (24).
Preferably, this high-pressure fluid pump of underground formation tester comprises:
By the first hydraulic line (8) that described first through hole is connected with described first cavity;
By the second hydraulic line (9) that described second through hole is connected with described second cavity (22);
By the first fluid pipeline (10) that described third through-hole is connected with described 3rd cavity;
By the second fluid pipeline (11) that described fourth hole is connected with described 4th cavity (24).
Preferably, the area in described step (31) First terrace or second step face is greater than the area of described king-rod (3) first end face or the second end face.
Compared with prior art, the high pressure fluid pump of the embodiment of the present application can be taken out by lowspeed pump, is applicable to low permeability formation pressure measurement, effectively improves the piezo-effect of low permeability formation.The high pressure fluid pump of the embodiment of the present application, when improving pump pressure, can realize formation fluid gastight sampling, improve formation tester gastight sampling effect.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and forms a part for specification, is used from and explains technological scheme of the present invention, do not form the restriction to technical solution of the present invention with the embodiment one of the application.
Fig. 1 is the structural representation of the high-pressure fluid pump of underground formation tester of the embodiment of the present application.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure reaching technique effect can fully understand and implement according to this.Each feature in the embodiment of the present application and embodiment be combineding with each other, all within protection scope of the present invention under prerequisite of not conflicting mutually.
As shown in Figure 1, the high-pressure fluid pump of underground formation tester of the embodiment of the present application mainly comprises top connector 1, upper pump barrel 2, king-rod 3, middle pump barrel 4, lower pump barrel 5, bottom fitting 6, displacement transducer 7, first hydraulic line 8, second hydraulic line 9, first fluid pipeline 10, second fluid pipeline 11 etc.
As shown in Figure 1, the outwardly one-tenth step 31 in middle part of king-rod 3, step 31 is first end near the side of top connector 1, is the second end near bottom fitting 6.Upper pump barrel 2 stuffing box gland is on the outer surface of king-rod 3 first end.Lower pump barrel 5 stuffing box gland is on the outer surface of king-rod 3 second end.Middle pump barrel 4 is enclosed within step 31 outer surface of king-rod 3 hermetically, the internal surface of first end and upper pump barrel 2 are threaded connection near the outer surface of the second end of king-rod 3 step 31, and the internal surface of the second end and lower pump barrel 5 are threaded connection near the outer surface of the first end of king-rod 3 step 31.The first end of upper pump barrel 2 is near top connector 1, and the first end of lower pump barrel 5 second end and bottom fitting 6 is threaded connection.Top connector 1 is inserted in the inside of pump barrel 2, is fixedly connected with upper pump barrel 2.
The internal diameter of upper pump barrel 2 is less than the internal diameter of middle pump barrel 4, and the internal diameter of lower pump barrel 5 is also less than the internal diameter of middle pump barrel 4.The center hole of the center hole of upper pump barrel 2, the center hole of middle pump barrel 4 and lower pump barrel 5, all coaxial with king-rod 3.
Displacement transducer 7 is connected to the second end of bottom fitting 6.The sensor bar 71 of displacement transducer 7 is arranged in the center hole of lower pump barrel 5 and the central blind hole of king-rod 3.The central blind hole opening of king-rod 3 is at the second end of king-rod 3.The center hole of lower pump barrel 5 is coaxial with the central blind hole of king-rod 3.
Under the effect of the pressure, king-rod 3 can move towards top connector 1 or bottom fitting 6 in the center hole of upper pump barrel 2, middle pump barrel 4 and lower pump barrel 5.
When king-rod 3 can move towards top connector 1 or bottom fitting 6 in the center hole of upper pump barrel 2, middle pump barrel 4 and lower pump barrel 5, step 31 on second end of upper pump barrel 2 and king-rod 3, towards the First terrace of top connector 1 side, can form the first cavity; Step 31 on the first end of lower pump barrel 5 and king-rod 3, towards the second step face of bottom fitting 6 side, can form the second cavity 22.It should be noted that, the situation shown in Fig. 1 be the first cavity comparatively narrow and small time schematic diagram.
The wall of king-rod 3 is provided with first through hole corresponding with this first cavity, the first hydraulic line 8 is connected with aforesaid first cavity by this first through hole.The wall of king-rod 3 is provided with second through hole corresponding with this second cavity 22, the second hydraulic line 9 is connected with aforesaid second cavity 22 by this second through hole.
When king-rod 3 moves towards bottom fitting 6, the center hole of upper pump barrel 2 can form the 3rd cavity between king-rod 3 first end and upper pump barrel 2 first end.When king-rod 3 moves towards top connector 1, the center hole of lower pump barrel 5 can form the 4th cavity 24 between king-rod 3 second end and lower pump barrel 5 second end.It should be noted that, the situation shown in Fig. 1 be the 3rd cavity comparatively narrow and small time schematic diagram.
By this first cavity to king-rod 3 top bar 31 First terrace apply pressure, king-rod 3 can be promoted and move towards bottom fitting 6.By this second cavity 22 to king-rod 3 top bar 31 second step face apply pressure, king-rod 3 can be promoted and move towards top connector 1.
The wall of upper pump barrel 2 is provided with third through-hole, and first fluid pipeline 10 is connected with aforesaid 3rd cavity by this third through-hole.In the embodiment of the application, first fluid pipeline 10 is fixedly installed on the outer surface of pump barrel 2.
The wall of lower pump barrel 5 is provided with fourth hole, and second fluid pipeline 11, by this fourth hole, is communicated with aforesaid 4th cavity 24.In the embodiment of the application, second fluid pipeline 11 is fixedly installed on the outer surface of bottom fitting 6.
The embodiment of the application is when operation, and high pressure liquid force feed injects the first cavity by the first hydraulic line 8, and promote king-rod 3 and move towards bottom fitting 6, the hydraulic oil in the second cavity 22 flows out the second cavity 22 by the second hydraulic line 9.Meanwhile, the mobile formation fluid that drives of king-rod 3 flows into the 3rd cavity through first fluid pipeline 10, and flows out from the 4th cavity 24 through second fluid pipeline 11.
In another moment, high pressure liquid force feed injects the second cavity 22 by the second hydraulic line 9, and promote king-rod 3 and move towards top connector 1, the hydraulic oil in the first cavity flows out the first cavity by the first hydraulic line 8.Meanwhile, the mobile formation fluid that drives of king-rod 3 flows into the 4th cavity 24 through second fluid pipeline 11, and flows out from the 3rd cavity through first fluid pipeline 10.
In the embodiment of the application, the pressure reduction between high pressure liquid force feed and bottoms stream, is determined by the step 31 First terrace of king-rod 3 or the area ratio of second step face and king-rod 3 first end face or the second end face.In the embodiment of the application, the area in step 31 First terrace or second step face is greater than the area of king-rod 3 first end face or the second end face, and therefore fluid pump pressure is less than system hydraulic pressure.Because the area in the step 31 First terrace of king-rod 3 or second step face is large, and the area of king-rod 3 first end face or the second end face is little, so under identical hydraulic pressure, flow rate pump diminishes, and realizes pump at a slow speed and takes out.
The high pressure fluid pump of the embodiment of the present application, can carry out reciprocating pump and take out to the fluid entering pipeline.The pressure taken out of pump is from the high pressure oil of oil hydraulic cylinder.The high pressure fluid pump of the embodiment of the present application has that volume is little, pressure is large and high temperature resistant etc. advantage, can be arranged in existing cable formation tester, realize the pressure measurement to low permeability formation and gastight sampling.
Although the mode of execution disclosed by the present invention is as above, the mode of execution that described content only adopts for ease of understanding the present invention, and be not used to limit the present invention.Those of skill in the art belonging to any the present invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be carried out in the form implemented and details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (7)
1. a high-pressure fluid pump of underground formation tester, comprise top connector (1), upper pump barrel (2), king-rod (3), middle pump barrel (4), lower pump barrel (5), bottom fitting (6) and displacement transducer (7), wherein:
The outwardly one-tenth step (31) in middle part of described king-rod (3), described step (31) is first end near the side of described top connector (1), is the second end near bottom fitting (6);
It is characterized in that, described upper pump barrel (2) stuffing box gland is on the outer surface of described king-rod (3) first end; Described lower pump barrel (5) stuffing box gland is on the outer surface of described king-rod (3) second end; Described middle pump barrel (4) is enclosed within described step (31) outer surface hermetically; The first end of described middle pump barrel (4) is connected with the second end of described upper pump barrel (2), and the second end is connected with the first end of described lower pump barrel (5); The first end of described upper pump barrel (2) is towards described top connector (1), and described lower pump barrel (5) second end is connected with the first end of described bottom fitting (6); Institute's displacement sensors (7) is connected to the second end of described bottom fitting (6); Described king-rod (3) can move towards described bottom fitting (6) or top connector (1).
2. high-pressure fluid pump of underground formation tester according to claim 1, is characterized in that, wherein:
Described top connector (1) is inserted in the inside of described upper pump barrel (2), and is fixedly connected with described upper pump barrel (2).
3. high-pressure fluid pump of underground formation tester according to claim 1, is characterized in that, wherein:
The sensor bar (71) of institute's displacement sensors (7) is arranged in the center hole of described lower pump barrel (5) and the central blind hole of described king-rod (3).
4. high-pressure fluid pump of underground formation tester according to claim 1, is characterized in that, wherein:
When described king-rod (3) is mobile towards described bottom fitting (6), second end of described upper pump barrel (2) and described step (31) can form the first cavity towards the First terrace of top connector (1) side, and the center hole of described upper pump barrel (2) can form the 3rd cavity between described king-rod (3) first end and described upper pump barrel (2) first end;
When described king-rod (3) is mobile towards described top connector (1), the first end of described lower pump barrel (5) and described step (31) can form the second cavity (22) towards the second step face of bottom fitting (6) side, and the center hole of described lower pump barrel (5) can form the 4th cavity (24) between described king-rod (3) second end and described lower pump barrel (5) second end.
5. high-pressure fluid pump of underground formation tester according to claim 4, is characterized in that, wherein:
The wall of described king-rod (3) is provided with first through hole corresponding with described first cavity, second through hole corresponding with described second cavity (22); The wall of described upper pump barrel (2) is provided with the third through-hole with described 3rd cavity connects; The wall of described lower pump barrel (5) is provided with the fourth hole be communicated with described 4th cavity (24).
6. high-pressure fluid pump of underground formation tester according to claim 5, is characterized in that, wherein, this high-pressure fluid pump of underground formation tester comprises:
By the first hydraulic line (8) that described first through hole is connected with described first cavity;
By the second hydraulic line (9) that described second through hole is connected with described second cavity (22);
By the first fluid pipeline (10) that described third through-hole is connected with described 3rd cavity;
By the second fluid pipeline (11) that described fourth hole is connected with described 4th cavity (24).
7. high-pressure fluid pump of underground formation tester according to claim 1, is characterized in that, wherein:
The area in described step (31) First terrace or second step face is greater than the area of described king-rod (3) first end face or the second end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310301228.XA CN103334895B (en) | 2013-07-17 | 2013-07-17 | A kind of high-pressure fluid pump of underground formation tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310301228.XA CN103334895B (en) | 2013-07-17 | 2013-07-17 | A kind of high-pressure fluid pump of underground formation tester |
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| Publication Number | Publication Date |
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| CN103334895A CN103334895A (en) | 2013-10-02 |
| CN103334895B true CN103334895B (en) | 2015-11-18 |
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| CN201310301228.XA Active CN103334895B (en) | 2013-07-17 | 2013-07-17 | A kind of high-pressure fluid pump of underground formation tester |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100647A (en) * | 1986-02-10 | 1987-08-26 | 流程工业公司 | Pump-unit and operating method thereof |
| GB2455934A (en) * | 2006-12-27 | 2009-07-01 | Schlumberger Holdings | Pump management for formation sampling tool |
| CN201991525U (en) * | 2011-01-20 | 2011-09-28 | 中国石油化工集团公司 | Throw-over subsurface sampler |
| CN202338334U (en) * | 2011-11-25 | 2012-07-18 | 中国石油天然气股份有限公司 | Pressure-drop testing device of high-pressure well |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120118138A1 (en) * | 2009-07-23 | 2012-05-17 | Swissinnov Product Sarl | Fluid delivery system comprising a fluid pumping device and a drive system |
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2013
- 2013-07-17 CN CN201310301228.XA patent/CN103334895B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100647A (en) * | 1986-02-10 | 1987-08-26 | 流程工业公司 | Pump-unit and operating method thereof |
| GB2455934A (en) * | 2006-12-27 | 2009-07-01 | Schlumberger Holdings | Pump management for formation sampling tool |
| CN201991525U (en) * | 2011-01-20 | 2011-09-28 | 中国石油化工集团公司 | Throw-over subsurface sampler |
| CN202338334U (en) * | 2011-11-25 | 2012-07-18 | 中国石油天然气股份有限公司 | Pressure-drop testing device of high-pressure well |
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| CN103334895A (en) | 2013-10-02 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |