CN112523716B - Underground low-permeability stratum packer and application method thereof - Google Patents
Underground low-permeability stratum packer and application method thereof Download PDFInfo
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- CN112523716B CN112523716B CN201910808344.8A CN201910808344A CN112523716B CN 112523716 B CN112523716 B CN 112523716B CN 201910808344 A CN201910808344 A CN 201910808344A CN 112523716 B CN112523716 B CN 112523716B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005086 pumping Methods 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 239000000523 sample Substances 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 48
- 239000012530 fluid Substances 0.000 claims description 42
- 230000035699 permeability Effects 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 description 41
- 238000009530 blood pressure measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses an application method of a downhole low-permeability stratum packer, which comprises a leaning arm, a supporting arm for supporting the leaning arm to stretch and retract, a driving mechanism for driving the supporting arm to stretch and retract and a probe, wherein the leaning arm comprises a punctiform leaning arm mainly composed of a punctiform supporting plate, a punctiform rubber pad and a punctiform filter screen and a columnar leaning arm mainly composed of a columnar supporting plate, a columnar rubber pad and a columnar filter screen. The invention also discloses an application method of the underground low-permeability stratum packer, namely, the underground low-permeability stratum packer with the dot-shaped leaning arms and the underground low-permeability stratum packer with the columnar leaning arms are respectively put into underground designated positions, and then the setting, grouting, pumping, sampling and measuring are carried out, and the measured data are recorded; and finally, calculating the data to further obtain the stratum pressure fluidity value. The invention adopts the packer with the large flow passage diameter and the special calculation method, can accurately reflect the actual stratum pressure in real time, and greatly improves the measurement precision.
Description
Technical field:
the invention belongs to the technical field of dynamic stratum testing in petroleum exploration and development, and relates to a downhole low-permeability stratum packer and an application method thereof.
The background technology is as follows:
During oil exploration and development, further analysis of the formation and its contained fluid characteristics is required, including formation fluid sampling and formation pressure and mobility measurements. The cable stratum dynamic tester can realize the function, an instrument with a stratum packer is put into the well, the packer is opened after reaching a target horizon, the packer is pushed against the well wall under the drive of hydraulic power, the underground slurry is separated from the stratum by the bridging action of a well wall mud cake, the stratum fluid is possibly sucked through a probe, and the sampling of the stratum fluid and the measurement of the stratum pressure fluidity are realized.
Oil exploration is gradually moving into the advanced technology drive phase, low permeability fields that were considered difficult to develop in the past are now being developed by high end technology, one of which is formation testing sampling and manometry. For hypotonic formations such as formations below 3 millidarcies, because the flow rate of formation fluid is extremely slow, the existing packers cannot obtain fluid samples with slow flow rate due to small extraction area, and cannot measure formation pressure. For example:
FIG. 1 shows a conventional packer and its fluid flow pattern (flow pattern in the conventional sense) in pumping, which is constructed by crimping rubber onto a specially shaped metal plate, the rubber sealing against the formation, and a suction tube that can pump fluid from the formation. When the fluid is sucked, the fluid enters the probe, and the flow of the fluid is in a sphere shape as shown in fig. 1 and is called a sphere flow model. In the above pumping process, since the diameter rp of the pumping pipe is about 3cm, the effective area of the pumping stratum is about 7cm 2, the fluid seepage speed of the hypotonic stratum during pumping is about 0-0.5 ml/s, and the shape of the pressure curve actually measured is shown in fig. 2. Wherein: MOB is formation mobility; deltaV: pumping volume cm3; Δp: formation pressure differential PSI; Δt: pumping time, seconds.c: model coefficients; rp: packer suction hole diameter.
Using equation 1-1, the fluid fluidity of the pressure measurement is calculated.
The fluid gradually approaches the formation pressure at a longer Δt time (typically greater than 10 seconds) due to the influence of the seepage velocity, but not the actual formation pressure, which is much less than the formation pressure. The calculated formation mobility MOB will be an unrealistic data since the true formation pressure is not available.
The invention comprises the following steps:
The invention aims to solve the problems in the prior art and provides a downhole low-permeability stratum packer capable of meeting the requirements of measuring low-permeability stratum fluid, cable stratum test sampling and pressure measurement accurately in real time and an application method thereof.
The technical proposal is as follows:
The utility model provides a low permeability stratum packer in pit, includes pushing arm, the flexible support arm of support pushing arm, the flexible actuating mechanism of drive support arm and probe, pushing arm includes the punctiform pushing arm that mainly comprises punctiform backup pad, punctiform rubber pad and punctiform filter screen, wherein: the leaning arm also comprises a columnar leaning arm which mainly comprises a columnar supporting plate, a columnar rubber pad and a columnar filter screen; the columnar support plate is of an elongated rectangular cambered surface structure, a rectangular drainage groove is formed in the outer protruding cambered surface of the columnar support plate, a drainage hole is radially formed in the drainage groove, the drainage hole extends out of a connecting port from the inner concave surface of the columnar support plate, and a sealing piece is arranged at the outer periphery of the connecting port; the columnar rubber pad is in an elongated rectangular cambered surface structure, and an elongated rectangular open slot is formed in the middle of the columnar rubber pad; the columnar filter screen is in a rectangular cambered surface structure, filter holes are distributed on the columnar filter screen, and the columnar filter screen and a rectangular open slot of the columnar rubber pad form embedded fit; the columnar support plate, the columnar rubber pad and the columnar filter screen are connected through the connecting piece to form an integrated structure.
The columnar support plate and the columnar rubber pad are integrally glued into a whole, and corners are arc-shaped chamfer angles.
The periphery is equipped with the step in the rectangle open slot of columnar rubber pad, and the columnar filter screen embeds in the step.
The filter holes distributed on the filter screen are elongated strip holes which are arranged in a matrix.
And a reinforcing seat connected with the telescopic arm of the packer is arranged at the periphery of the concave connector in the supporting plate.
The invention also provides an application method of the downhole low-permeability stratum packer, which comprises the following steps:
after a downhole low-permeability stratum packer with a dot leaning arm is put into a downhole designated position, starting the packer to realize sealing with a well wall;
Injecting mud into the well, starting probe suction after the well wall and the leaning arm generate a bridging effect, further realizing formation fluid sampling and formation pressure fluidity measurement, and recording measurement data;
lifting the underground low-permeability stratum packer with the dot leaning arm, replacing the underground low-permeability stratum packer with the columnar leaning arm, and then starting the packer to realize sealing with the well wall after the underground low-permeability stratum packer is put into the underground designated position again;
injecting mud into the well, starting probe suction after the well wall and the leaning arm generate a bridging effect, further realizing formation fluid sampling and formation pressure fluidity measurement, and recording measurement data again;
and (5) performing permeability calculation on the twice recorded data to obtain a stratum pressure fluidity value.
The calculation model of the twice recorded data is as follows:
for the two recordings, the formation permeability format at fluid pumping is:
wherein: k-permeability, md; cp-model coefficients; q-flow, cm 3/s; r-packer suction effective radius, cm; u-fluid viscosity, mpa.s; ΔP-formation pressure differential PSI;
Considering the relation between the pumping area and the permeability of the packer, the above formula is converted into
Wherein: s-pumping effective area of the packer, cm 2; f-a comprehensive flow factor;
The formula is a permeability calculation formula reflecting the pressure drop period process under a static condition after the pressure drop period is stabilized;
the above is expressed in international units:
if the packer form factor is determined, then F can be determined, and the above formula is expressed in Darcy units:
The invention has the following effects:
When the packer is matched with the packer, the joint surface of the sidewall contact arm and the well wall is greatly increased, when stratum fluid is pumped, the fluid flows into the packer along the surface and the periphery of the packer, the pumping area is tens of times larger than that of the traditional packer, and the pressure measurement and the fluid sampling of the hypotonic stratum are very effective; the packer solves the problems that in the pumping process, the effective area of a pumped stratum is small, the seepage speed of fluid is low when the hypotonic stratum is pumped, the actually measured pressure can gradually approach the stratum pressure only when the fluid is in a long time, and the actual stratum pressure can not be accurately reflected in real time. The accuracy of measurement is greatly improved by matching the application methods (calculation methods) of the two modes.
Description of the drawings:
FIG. 1 illustrates a prior art packer punctiform pumping source fluid flow pattern;
FIG. 2 is a graph of pressure measurements of a hypotonic formation of a prior art packer;
FIG. 3 is a schematic diagram of the operation of the large flow passage formation packer of the present invention;
FIG. 4 is a schematic diagram of a sidewall contact arm assembly of a downhole low permeability formation packer of the present invention;
FIG. 5 is a schematic view of the back of the backup arm of the downhole low permeability formation packer of the present invention;
FIG. 6 is a schematic illustration of the fluid flow pattern of the present invention;
FIG. 7 is a graph of pressure measurements of a large flow path packer of a hypotonic formation of the present invention;
FIG. 8 is a schematic diagram of a push arm structure of a downhole low permeability formation packer of the present invention.
The specific embodiment is as follows:
The invention will be further described with reference to the accompanying drawings and examples of embodiments.
Example 1
The packer for underground low permeability stratum includes one conventional packer comprising one pushing arm, one telescopic supporting arm, one driving mechanism for driving the supporting arm to stretch and draw back, and one probe.
The structure of the columnar biasing arm will be described below with reference to fig. 4, 5 and 8.
The columnar support plate 4 is of an lengthened rectangular cambered surface structure, a rectangular drainage groove is formed in the outer convex cambered surface of the columnar support plate 4, a drainage hole is radially formed in the drainage groove, the drainage hole extends out of the connecting port 5 from the inner concave surface of the columnar support plate, and a sealing piece 6 is arranged on the outer periphery of the connecting port 5. The columnar rubber pad 3 is in a lengthened rectangular cambered surface structure, and a lengthened rectangular open slot is formed in the middle. The columnar filter screen 2 is of a rectangular cambered surface structure, filter holes are distributed on the columnar filter screen 2, and the columnar filter screen 2 and a rectangular open slot of the columnar rubber pad 3 form embedded fit. The columnar support plate 4, the columnar rubber pad 3 and the columnar filter screen 2 are connected through connecting pieces (screws 1) to form an integrated structure.
Example 2
Further optimizing on the basis of example 1:
the columnar support plate 4 and the columnar rubber pad 3 are integrally glued into a whole, and corners are arc-shaped chamfer angles.
The inner periphery of the rectangular opening groove of the columnar rubber pad 3 is provided with a step, and the columnar filter screen 2 is embedded in the step.
Example 3
Further optimizing on the basis of the above embodiment 1 or 2:
The filter holes distributed on the columnar filter screen 2 are elongated strip holes which are arranged in a matrix. The elongated strip holes are zigzag continuous holes or intermittent holes. The periphery of the concave connection port 5 in the columnar support plate 4 is provided with a reinforcing seat 7 connected with a telescopic arm of the packer.
Typical example 4
Referring to fig. 4, 5 and 8, a set of columnar leaning arms is added on the basis of the existing packer for a downhole low-permeability stratum packer.
The columnar pushing device comprises a columnar supporting plate 4, a columnar rubber pad 3, a columnar filter screen 2 and a connecting piece (screw 1).
Wherein: the columnar support plate 4 is a lengthened metal support plate with a rectangular cambered surface structure, the stress intensity reaches 1500Kg, and the columnar support plate cannot deform after being pushed against a well wall. Rectangular drainage grooves are formed in the outer convex cambered surfaces of the columnar support plates 4, drainage holes are radially formed in the drainage grooves, the drainage holes extend out of the connecting ports 5 from the inner concave surfaces of the support plates, and sealing pieces 6 are arranged on the outer periphery of the connecting ports 5. The columnar rubber pad 3 is made of special high-temperature-resistant high-hardness rubber, and the rubber hardness is required to be 80-90HD under the environment of high temperature 175 ℃, so that the columnar rubber pad can play a role in sealing mud and stratum after being abutted against a well wall. The columnar rubber pad 3 has the same structure as the columnar supporting plate 4, and an elongated rectangular open slot is formed in the middle. The columnar filter screen 2 is of a rectangular cambered surface structure, filter holes are distributed on the filter screen 2, the filter screen 2 and a rectangular opening groove of the rubber pad 3 form embedded cooperation, a hypotonic stratum is generally siltstone or argillaceous siltstone with high compaction degree under normal conditions, and the filter screen with a gap of 1.2mm can work normally for filtering out solid particles such as chips and sand in mud or stratum fluid and preventing a runner pipeline from being blocked. The columnar support plate 4, the columnar rubber pad 3 and the columnar filter screen 2 are connected through the bolts 1 to form an integrated structure. The columnar supporting plate 4 and the columnar rubber pad 3 are integrally glued into an integral structure by adopting a thermoplastic process, and corners are arc-shaped chamfer angles. Ensuring that the material does not fall off under the stress environment and the high-temperature environment.
Example 5
The application method adopting the underground low-permeability stratum packer comprises the following steps:
(1) After a downhole low-permeability stratum packer with a dot leaning arm is put into a downhole designated position, starting the packer to realize sealing with a well wall;
(2) Injecting mud into the well, starting probe suction after the well wall and the leaning arm generate a bridging effect, further realizing formation fluid sampling and formation pressure fluidity measurement, and recording measurement data;
(3) Lifting the underground low-permeability stratum packer with the dot leaning arm, replacing the underground low-permeability stratum packer with the columnar leaning arm, and then starting the packer to realize sealing with the well wall after the underground low-permeability stratum packer is put into the underground designated position again;
(4) Injecting mud into the well, starting probe suction after the well wall and the leaning arm generate a bridging effect, further realizing formation fluid sampling and formation pressure fluidity measurement, and recording measurement data again;
(5) And (5) performing permeability calculation on the twice recorded data to obtain a stratum pressure fluidity value.
The calculation model of the twice recorded data is as follows:
for the two recordings, the formation permeability format at fluid pumping is:
wherein: k-permeability, md; cp-model coefficients; q-flow, cm 3/s; r-packer suction effective radius, cm; u-fluid viscosity, mpa.s; ΔP-formation pressure differential PSI;
Considering the relation between the pumping area and the permeability of the packer, the above formula is converted into
Wherein: s-pumping effective area of the packer, cm 2; f-a comprehensive flow factor;
The formula is a permeability calculation formula reflecting the pressure drop period process under a static condition after the pressure drop period is stabilized;
the above is expressed in international units:
if the packer form factor is determined, then F can be determined, and the above formula is expressed in Darcy units:
When the formation fluid is pumped, the fluid flows into the interior of the packer along the surface and circumference of the arm. For point-like suction sources (see fig. 1 and 2), the flow situation is more accurately simulated by using a spherical model of a conventional point-like leaning arm. For a strip or column suction source (see fig. 3 and 6), a column flow model using a column pushing arm is more accurate. The packer is corrected on the basis of a spherical flow model and a cylindrical model, and a novel flow model is obtained.
To verify effectiveness and suction capacity in low porosity formations, a mathematical model was built. In fig. 6, the packer suction channel is a near double circular flow model with a radius r. If the pressure disturbance radius is not considered when the pressure is pumped near the well wall, the pressure field of the packer is uniformly distributed. According to the theory of seepage mechanics, the formation permeability format during fluid pumping is as follows:
Wherein: k-permeability, md;
Cp- -model coefficient
Q-flow, cm 3/s;
r-effective radius of pumping by packer, cm;
u-fluid viscosity, mpa.s;
if the relationship between the packer suction area and the permeability is considered, the above formula can be converted into
S- -packer suction effective area, cm 2
F-Integrated flow factor
The formula is a permeability calculation formula which reflects the pressure drop period process in a static condition after settling in the pressure drop period.
The above is expressed in international units:
If the packer is sized, F can be determined. The above formula uses darcy list
Bits are expressed as:
By numerical simulation, a pressure recovery curve at a permeability of 1 millidarcy was simulated, as shown in fig. 7. The curve accurately reflects the pressure drop form of formation fluid during pumping, the fluid pressure is quickly restored to the formation pressure, the restored pressure reflects the true pressure of the formation, and the calculated fluid fluidity is true and effective.
Claims (5)
1. The application method of the underground low-permeability stratum packer comprises a leaning arm, a supporting arm supporting the leaning arm to stretch out and draw back, a driving mechanism driving the supporting arm to stretch out and draw back and a probe, wherein the leaning arm comprises a point leaning arm mainly composed of a point supporting plate, a point rubber pad and a point filter screen, and the application method is characterized in that:
The leaning arm also comprises a columnar leaning arm which mainly comprises a columnar supporting plate, a columnar rubber pad and a columnar filter screen; the columnar support plate is of an elongated rectangular cambered surface structure, a rectangular drainage groove is formed in the outer convex cambered surface of the columnar support plate, a drainage hole is radially formed in the drainage groove, the drainage hole extends out of the connecting port from the inner concave surface of the columnar support plate, and a sealing piece is arranged at the outer periphery of the connecting port; the columnar rubber pad is in an elongated rectangular cambered surface structure, and an elongated rectangular open slot is formed in the middle of the columnar rubber pad; the columnar filter screen is in a rectangular cambered surface structure, filter holes are distributed on the columnar filter screen, and the columnar filter screen and a rectangular open slot of the columnar rubber pad form embedded fit; the columnar support plate, the columnar rubber pad and the columnar filter screen are connected through connecting pieces to form an integrated structure;
the method also comprises the following steps:
after a downhole low-permeability stratum packer with a dot leaning arm is put into a downhole designated position, starting the packer to realize sealing with a well wall;
Injecting mud into the well, starting probe suction after the well wall and the leaning arm generate a bridging effect, further realizing formation fluid sampling and formation pressure fluidity measurement, and recording measurement data;
lifting the underground low-permeability stratum packer with the dot leaning arm, replacing the underground low-permeability stratum packer with the columnar leaning arm, and then starting the packer to realize sealing with the well wall after the underground low-permeability stratum packer is put into the underground designated position again;
injecting mud into the well, starting probe suction after the well wall and the leaning arm generate a bridging effect, further realizing formation fluid sampling and formation pressure fluidity measurement, and recording measurement data again;
performing permeability calculation on the twice recorded data to obtain a stratum pressure fluidity value;
the calculation model of the twice recorded data is as follows:
for the two recordings, the formation permeability format at fluid pumping is:
wherein: k-permeability, md; cp-model coefficients; q-flow, cm 3/s; r-packer suction effective radius, cm; u-fluid viscosity, mpa.s; ΔP-formation pressure differential PSI;
Considering the relation between the pumping area and the permeability of the packer, the above formula is converted into
Wherein: s-pumping effective area of the packer, cm 2; f-a comprehensive flow factor;
The formula is a permeability calculation formula reflecting the pressure drop period process under a static condition after the pressure drop period is stabilized;
the above is expressed in international units:
if the packer form factor is determined, then F can be determined, and the above formula is expressed in Darcy units:
2. The method of using a downhole low permeability formation packer according to claim 1, wherein: the columnar support plate and the columnar rubber pad are integrally glued into a whole, and corners are arc-shaped chamfer angles.
3. The method of using a downhole low permeability formation packer according to claim 2, wherein: the periphery is equipped with the step in the rectangle open slot of columnar rubber pad, and the columnar filter screen embeds in the step.
4. A method of using a downhole low permeability formation packer according to claim 1, 2 or 3, wherein: the filter holes distributed on the filter screen are elongated strip holes which are arranged in a matrix.
5. The method of using a downhole low permeability formation packer according to claim 4, wherein: and a reinforcing seat connected with the telescopic arm of the packer is arranged at the periphery of the concave connector in the supporting plate.
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| CN211666706U (en) * | 2019-08-29 | 2020-10-13 | 中石化石油工程技术服务有限公司 | Pushing arm for underground low-permeability stratum packer |
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| US4941350A (en) * | 1989-04-10 | 1990-07-17 | Schneider George F | Method and apparatus for formation testing |
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| US7331223B2 (en) * | 2003-01-27 | 2008-02-19 | Schlumberger Technology Corporation | Method and apparatus for fast pore pressure measurement during drilling operations |
| CN1667243A (en) * | 2004-03-08 | 2005-09-14 | 石油大学(北京) | Stratum parameter test method based on multi-probe |
| CN100437553C (en) * | 2004-07-13 | 2008-11-26 | 中海油田服务股份有限公司 | Method for simulating test of cable formation tester |
| CN2806762Y (en) * | 2005-03-18 | 2006-08-16 | 中海油田服务股份有限公司 | Double-probe eccentering arm |
| CN100523431C (en) * | 2005-12-12 | 2009-08-05 | 中海油田服务股份有限公司 | Method for simulating oil-water two-phase cable formation testing |
| US7584655B2 (en) * | 2007-05-31 | 2009-09-08 | Halliburton Energy Services, Inc. | Formation tester tool seal pad |
| US8015867B2 (en) * | 2008-10-03 | 2011-09-13 | Schlumberger Technology Corporation | Elongated probe |
| AU2013381887A1 (en) * | 2013-03-15 | 2015-08-13 | Halliburton Energy Services, Inc | Downhole formation testing and sampling apparatus having a deployment linkage assembly |
| CN103334746B (en) * | 2013-06-18 | 2016-04-06 | 中国石油天然气集团公司 | FDT modular formation tester is popped one's head in |
| CN105275460B (en) * | 2015-10-16 | 2018-06-01 | 中国石油天然气集团公司 | A kind of FDT modulars dual probe formation tester and test system |
| CN109356574B (en) * | 2018-10-08 | 2022-02-01 | 中国石油天然气集团有限公司 | Logging robot system and logging method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204804834U (en) * | 2014-11-05 | 2015-11-25 | 王少斌 | Push away and lean on seating and sealing unit |
| CN211666706U (en) * | 2019-08-29 | 2020-10-13 | 中石化石油工程技术服务有限公司 | Pushing arm for underground low-permeability stratum packer |
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