CN101550828B - Device and method for implementing focus sampling of reservoir fluid - Google Patents
Device and method for implementing focus sampling of reservoir fluid Download PDFInfo
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- CN101550828B CN101550828B CN200810090016.0A CN200810090016A CN101550828B CN 101550828 B CN101550828 B CN 101550828B CN 200810090016 A CN200810090016 A CN 200810090016A CN 101550828 B CN101550828 B CN 101550828B
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Abstract
The invention discloses a device and a method for implementing focus sampling of reservoir fluid. In the method in the embodiment, a sampling probe is connected to the underground, and then, the pumping rates of at least two displacing units are changed after the connection so as to reduce the pollution level of stratum liquid extracted by the sampling probe from the underground.
Description
Related application
This patent requires the rights and interests of the submission date of the U.S. Provisional Patent Application 60/882,364 of submitting on December 28th, 2006.
Open field
The disclosure relates in general to evaluation of reservoirs, more particularly, relates to equipment and the method for the focus sampling of carrying out reservoir fluid.
Background technology
Drilling well, completion and the production of oil reservoirs well relates to the monitoring of various subsurface formations parameters.For example, parameter, such as the permeability of reservoir pressure and reservoir rock stratum, usually measured so that evaluation of subterranean stratum.Fluid can be from stratum sucking-off collect fluid and measure and the various fluid behaviours of analysing fluid sample.The monitoring of this subsurface formations parameter is used to, and for example, determine along the strata pressure of well track and change, or predictably production capacity and the life-span of sub-surface.
Some known underground survey systems can obtain these parameters by wireline logging by means of formation tester or sampling instrument.Or formation tester or sampling instrument can be connected to for example, drilling rod and directed drilling assembly with drill bit (, as shaft bottom drill tool assembly a part) series connection.This formation testing and sampling instrument can adopt fluid sampling to pop one's head in to implement, and each probe has one or more ozzles, entrance or opening, and formation fluid can be inhaled into wherein.Conventionally draw formation fluid with various types of sampling instruments or probe.For example, some sampling instruments use extendible probe, and extendible probe is commonly referred to packer sometimes, have single ozzle or entrance for drawing formation fluid.Probe (for example, ozzle or entrance) is surrounded by circle or ring-shaped rubber interface or packer conventionally, and interface or packer are expanded and the power that applies is tightly connected ozzle or entrance and subsurface formations to borehole wall.In some cases, the sealing being provided by packer can adopt swellable packer device to implement, for example, at United States Patent (USP) 6,301, described in 959.Some sampling probes or packer provide multiple entrances (for example, two entrances), and at least one entrance is sample entrance here, and at least another entrance is protection entrance.But, multiple enter outlet structure in the situation that, can use multiple packers so that at least one packer comprises sample entrance, the one or more packers that separate in addition comprise protection entrance.
In operation, sampling probe or packer can be expanded from downhole tool by hydraulic transmission, so that its ozzle or entrance are near the borehole wall of contiguous evaluated ground layer segment.Then start pump by fluid inspiration probe from stratum, and formation fluid is transported to downhole testing device and/or sample collector, downhole testing device and/or sample collector can be taken back on ground to can carry out lab analysis to the sample fluid wherein comprising.In addition, as mentioned above, sampling probe entrance is surrounded by packer conventionally, and packer can promote the sealing near the sampling probe entrance of borehole wall, therefore, promotes pressure to be applied to stratum with draw fluid from stratum effectively.
In the time of draw fluid from stratum, a certain amount of filtrate also can be sucked into probe with formation fluid, thereby pollutes sample fluid.The degree of contamination (for example, contamination percentage) of sample fluid is larger at first, but along with sampling probe continues to draw formation fluid from stratum, degree of contamination reduces conventionally.Therefore, the fluid extracting from stratum by sampling probe goes out of use conventionally until arrive certain time in sampling process, and level of pollution is enough low, to allow to collect the sample with acceptable purity, for test and purpose of appraisals.
For single entrance sampling probe (that is, only provide sample entrance, and do not protect the sampling probe of entrance), the relatively large fluid of sucking-off from stratum of can having to before reaching acceptable purity or level of pollution.But drawing so a large amount of fluid can need a large amount of time, if the sampled process of particularly working is delayed, may suffer heavy losses.In addition, although by draw at first a large amount of fluids from stratum, degree of contamination significantly reduces, and for single entrance probe, accessible minimum level of pollution or degree are still very high, so that affect the degree of accuracy of test result.
Although proved that single entrance sampling probe is quite effective, two entrances or protection probe can provide formation fluid sampling improved, that focus on.This pair of entrance or protection probe generally include concentric ozzle or entrance, and here, center ozzle or entrance are as the setting of sampling entrance, and outside ozzle or entrance are as the setting of protection entrance.More specifically, protection entrance forms circumference or ring around center or sampling entrance, protection entrance is set and substantially draws all filtrate away from the core of probe and central inlet therefore, thereby make center or sampling entrance can draw the formation fluid of relative contamination-free (for example filtrate).Two entrances or protection probe also utilize two packers to seal the probe near evaluated stratum.Outside packer surrounds protection ozzle or entrance, and inner packer surrounds center sample ozzle or the entrance between sample entrance outer wall and protection entrance inwall.
Compared with single entrance probe, (two entrances or protection probe can greatly reduce to reach time that enough low contamination levels need, reduce the sample clarification time), can greatly reduce like this cost relevant to formation evaluation (for example, reducing the survey station time).In addition, compared with popping one's head in with traditional single entrance, two entrances or protection probe can also provide significantly improved sample purity (, lower level of pollution).The sample purity level improving like this can provide information more accurately, judges for optimization ground completion and product.
Although two entrances or protection probe can greatly reduce the sample clarification time and improve sample purity level, so two entrance probes can cause certain Operating Complexity or difficulty.Especially, each ozzle or entrance (for example have the own independent pumping installations of controlling and fluid line conventionally, protection and sample fluid pipeline), this makes accurately to control the relative pump rate (, pumping distributes) of protection ozzle or entrance and fluid line and sample to become very difficult.Protection and the relative pump rate of sample entrance and fluid line be can not accurately control and the infringement of level of pollution higher in sample fluid, inner packer sealing or the breakage of inner packer, longer sample clarification time caused, etc.In addition, the use of the independent pumping installations of each entrance and fluid line causes still less available energy for each pumping, also to cause lower total energy effect.
For some known two entrances or protection probe system, the pressure reduction that strides across pumping installations formation is mainly relative fixing on the basis of the structure of displacement unit and the mobility of sampled fluid in pumping installations.Therefore, for specific fluid mobility, can select specific displacement unit to be provided for the extraction speed of the expectation of each protection and sample entrance and fluid line, and relative pump rate or pumping between guard system and sample system distribute.But, fluid mobility can not be accurately known before sampling, therefore, the displacement unit of selecting can form pressure reduction, this pressure reduction (for example causes poor fluid sampling, between sample and protection entrance, flow, therefore, increased the pollution of sample) and/or infringement and the destruction of inner packer.In addition, further regulate the pump rate and the pressure reduction that are formed by pumping installations conventionally to require to replace displacement unit, ground, this elapsed time and cost are very large.
Summary of the invention
According to an exemplary embodiment, a kind of equipment using together with downhole tool is disclosed.This equipment comprises driving device and valve.Driving device has more than first chamber that is fluidly connected to the fluid line relevant to downhole tool, and valve is fluidly connected between more than first chamber, to change the fluid pumping speed by fluid line.
According to another exemplary embodiment, a kind of equipment using together with downhole tool is disclosed.This instrument comprises the first displacement unit, changes the first fluid characteristic relevant to first fluid pipeline; The second displacement unit, changes the second fluid characteristic relevant to second fluid pipeline, thus wherein the first and second displacement unit simultaneously operating that is operably connected; And motor, be operably connected to the first and second displacement unit.
According to another exemplary embodiment, a kind of pump using together with downhole tool is disclosed.This pump comprises multiple chambers, multiple piston and at least one valve.Each corresponding at least one chamber of multiple pistons, they are operably connected with synchronizing moving.At least one valve fluidly connects at least one chamber so that the flow velocity being provided by pump to be optionally provided.
According to another exemplary embodiment, one method comprises: sampling probe is connected to subsurface formations, the pumping ratio of displacement unit of at least two mechanical connections of change, to reduce the level of pollution of the formation fluid of drawing by sampling probe from subsurface formations, although being connected to subsurface formations, sampling probe is disclosed.
According to another exemplary embodiment, a kind of equipment using in drilling well is disclosed.The equipment using in drilling well comprise be fluidly connected to first fluid pipeline the first displacement unit, be fluidly connected to the second displacement unit of second fluid pipeline and be operably connected to displacement unit so that displacement units synchronization pulsating motor.
According to another exemplary embodiment, a kind of method of controlling flow velocity in downhole tool is disclosed.The method comprises: downhole tool is down in pit shaft, in pit shaft by the first fluid line fluid relevant to the first displacement unit be connected to subsurface formations, by the second fluid line fluid relevant to the second displacement unit be connected to subsurface formations, utilize motor make first and second displacement units synchronization move back and forth come from subsurface formations draw fluid.
Accompanying drawing summary
Fig. 1 is the schematic diagram of the known pumping structure for protecting sampling probe assembly.
Fig. 2 A is the schematic diagram with the exemplary pumping structure of two displacement unit blocks, and the pressure reduction that wherein strides across each displacement unit can independently be controlled.
Fig. 2 B is the schematic diagram with another selectable pumping structure of two displacement unit blocks, and wherein pumping fluid can be transported on one or two displacement unit independently.
Fig. 3 is the schematic diagram of exemplary focus sampling system, and wherein this system can be implemented with the pumping structure with two displacement unit blocks.
Fig. 4 is another the selectable pair of displacement unit structure that can be used for the exemplary focus sampling system that realizes Fig. 3.
Fig. 5 a, 5b and 5c have described the various tool layout that adopts illustrative methods described here and equipment.
Fig. 6 has illustrated the exemplary variable displacement unit that comprises two displacements unit.
Fig. 7 is the chart that the various operator schemes that can be provided by the exemplary variable displacement unit of Fig. 6 are described.
Fig. 8 has described another variable displacement unit structure.
Fig. 9 has schematically described and has merged the variable displacement unit structure that exceedes four chambers.
Figure 10 has described the variable displacement unit of another example.
Figure 11 is the schematic diagram of exemplary processor platform, can programme to carry out any or all exemplary apparatus described here and method with this processor platform and/or to this processor platform.
Describe in detail
The exemplary pumping structure being described in more detail below can use two or protection probe sampling instrument, and formation fluid sampling improved, that focus on is provided.More specifically, exemplary pumping structure can be used to make the displacement unit mechanical synchronization being associated with protection and sample fluid pipeline.But, although should be appreciated that exemplary pumping structure described here comes into question together with two or protection probe sampling instrument, but exemplary pumping structure can be applied more at large, therefore, for example, if needed, can use for example one or more single entrance probes.
Compared with using traditional pumping structure of two or protection sampling probe, exemplary pumping structure described here comprises controller, to separately change and stride across the pressure reduction of each displacement unit, and therefore change pump rate distribution between displacement unit or the pumping ratio of sample and protection fluid line.Automatically control pressure reduction and extract this change of rate-allocation, the formation fluid sampling that still provides more fast, focuses on when the down well placement with convenient instrument.Therefore, compared with the system known with some, exemplary focusing formation fluid sampling system described here has been eliminated the needs that change decimation pattern and/or power is provided to hydraulic system, and/or the movement of one or two displacement unit (, on the ground) and replacing distribute to for example realize the pump rate of expecting.In addition, with adaptive mode control exemplary focusing formation fluid sampling system described here, for example, so that response formation characteristics and/or formation fluid characteristics are (, fluid mobility) change automatically and control and stride across the pressure reduction of displacement unit and the pump rate of protection and sample fluid pipeline, thereby can sample more rapidly and accurately, eliminate the risk of inner packer inefficacy or make this risk minimization, etc.
Before the detailed description of above-mentioned exemplary pumping structure is provided, first provide the concise and to the point description of known pumping structure in conjunction with Fig. 1.Fig. 1 has the known pumping structure of protection sampling assemble or the schematic diagram of system 100.Extract in application at much oil, positive displacement pump (positive displacementpump) is usually used to withdrawn fluid from stratum.Positive displacement pump is set to each stroke or moves back and forth a certain amount of fluid of displacement at every turn.The fluid extracting from stratum is usually the many sand of thickness, and this makes to use the hydraulic pump of direct pumping structure is unpractical.On the contrary, hydraulic pump or linear motor conventionally be configured to produce enough the displacement unit of the pumping force of withdrawn fluid from stratum and be connected.The characteristic of the volume that traditional displacement unit conventionally can be based on piston chamber and attached pump or motor produces pumping pressure.In general, can provide the focus sampling of formation fluid with thering is known pumping system 100 two or protection sampling probe.As Fig. 1 describes, known system 100 comprises displacement unit 102 and 104, and each displacement unit is in a conventional manner by corresponding motor and/or hydraulic system (motor and hydraulic system are not illustrated) drive.Displacement unit 102 is fluidly connected to protection fluid line 106 by flap valve 108,110,112 and 114, so that fluid can from protection ozzle, entrance part is two or protection sampling probe (not shown) drawn, and be transmitted or be pumped into for example well annulus in the direction of arrow.Similarly, displacement unit 104 is fluidly connected to sample fluid pipeline 116 by flap valve 118,120,122 and 124, with allow to from sample ozzle, entrance part is two or protection sampling probe draw fluid, and in direction of arrow transmission or be pumped into for example sample collector.Or as known in anti-low shake sampling technique, fluid line 116 can be connected to the back side of the sliding plunger that is arranged in sample collector.
Select each of displacement unit 102 and 104 that the pressure reduction of expectation and/or pump rate are provided so as from specific stratum withdrawn fluid.For example, the stratum that produces relative lazy flow fluid requires to use the displacement unit that relatively high pumping pressure reduction is provided.Therefore,, for known system 100, it is conventionally available that several different displacement unit structure of different pressure reduction is provided.By this way, suitable displacement unit can be selected and be arranged in downhole tool to meet the requirement of specific stratum, fluid and/or sampling application.
In addition, as described in Figure 1, displacement unit 102 and 104 can be set different size or be arranged to provide the pump rate of expectation to distribute or stride across pumping ratio and/or the pressure of the inside packer of sampling probe.Normally, the size of setting the displacement unit 102 that is connected use with protection fluid line 106 is so that 2～4 times of the pump rate that the pump rate providing is displacement unit 104 is provided to sample fluid pipeline 116.Although it is possible that selection totally meets the displacement unit of specific assignment sampling application requirements, due to relevant uncertainties such as the variations occurring with the fluid of formation characteristics, formation fluid characteristics, stratum and/or therefrom sampling, it is complicated that such selection can become.As a result, the initial selection of displacement unit can not be carried out as expected or desirably.In order to improve sampling performance, downhole tool can remove from drilling well, and one or two in displacement unit 102 and 104 can be replaced by heteroid parts, and described heteroid parts can provide the sampling performance of expectation.But, such determine preferably or substantially the experience program of best displacement unit structure can consume a large amount of time and need expensive replacement and test period, to guarantee carry out desired or acceptable sampling.
The mechanically actuated independence of the displacement unit 102 and 104 using in known system 100 also causes certain operation invalid and/or difficult.For example, because striding across the pressure of each generation in displacement unit 102 and 104 greatly changes about the average in the whole stroke of respective pistons 126 and 128, so the pressure peak producing by displacement unit 102 and 104 can comprise near the remarkable ringing of local flow pattern sampling probe entrance, thereby layer fluid and filtrate have adverse influence effectively discretely to sampling probe.The impact changing in order to reduce this pressure, known system 100 adopts the simultaneously operating of relative complex conventionally, when displacement unit 102 (, be used for protecting fluid line 106) near piston 126 its stroke end time, by described simultaneously operating, be interrupted by the pumping of sample fluid pipeline 116.
As mentioned above, known system 100 for the independent motor of each displacement unit 102 and 104 (for example uses, electric and/or waterpower), this has caused lower total energy effect conventionally, has reduced to can be used for operating the power of each displacement unit 102 and 104.As a result, known system 100 does not operate two displacement unit 102 and 104 conventionally at the cleansing phase of sampling process.For example, (be a kind of program in order to carry out purification, by this program, sampled fluid is drawn and was dropped before reaching the sample purity level of expectation, to make the sample of collecting subsequently can be used for analyzing), only displacement unit 102 can be operated, and system 100 can be set to mixed mode, in this mixed mode, 102 pumpings of displacement unit or absorption are by the formation fluid of protection and sample fluid pipeline 106 and 116.The purity level that reaches expectation when the formation fluid of being drawn by displacement unit 102 (, reach enough low level of pollution) time, system 100 is transformed into the clastotype of operation, in clastotype, two displacement unit 102 and 104 independent operations, guard section draw fluid by displacement unit 102 from sampling probe, the sampling part draw fluid by displacement unit 104 from sampling probe.
Another difficulty relevant with known system 100 described in Fig. 1 relates to minimum pump rate and the attainable pressure reduction of displacement unit 104, and displacement unit 104 is used for from the sample part withdrawn fluid of two probes.Particularly, although pressure reduction and the pump rate of expectation can be provided with several displacements unit, but, in some applications, for example those relate in the application of formation fluid of relative lazy flow, pressure reduction can not be reduced to the inside packer of sampling probe is had under potential destructive level.
Fig. 2 A is the schematic diagram with the exemplary pumping structure 200 of two displacement unit blocks 202, and in two displacement unit blocks 202, the pressure reduction that strides across each displacement unit can independently be controlled.And compared with the known system of Fig. 1, two displacement unit blocks 202 comprise displacement unit 204 and 206, displacement unit 204 is mechanically connected with 206 or in conjunction with so that with consistent or method of synchronization operation.The exemplary pair of displacement unit block 202 may be embodied to and there are four chambers (, every two chambers for displacement unit 204 with 206 one of them), the corresponding piston 208 that is connected with common axis 212 and 210 and monomer or single case of motor (not shown).For example, or two displacement unit blocks 202 may be embodied to many bodies or many casees (, two or more casings), each casing comprises one or part displacement unit 204 and 206.In the situation of the many bodies of application or many casees, each in piston 208 and 210 has corresponding axle (not shown), these shaft mechanicals ground connects, in conjunction with, connect or be for example operably connected in addition, to make the displacement unit 204 and 206 can simultaneously operating (, pumping).In any case, the mechanical connection of displacement unit 204 and 206 and simultaneously operating therefore can be eliminated the needs of the simultaneous techniques instantaneous interruption of the displacement unit of the sample part draw fluid of sampling probe (, from) that uses the relative complex of application in Fig. 1 known system 100.In other words, the mechanical connection of the displacement unit 204 and 206 in exemplary displacement unit block 202 and synchronous for eliminating pressure and the flow pattern transient phenomenon of the near interface between stratum and protection entrance and the sample entrance of two sampling probes or substantially minimizing it, thereby eliminate at sampling probe/bed boundary place about fluid separate (, separating filtrate from formation fluid) this transient phenomenon adverse effect or minimize it.
In the example system 200 of Fig. 2 A, displacement unit 204 is fluidly connected to protection fluid line 214 by flap valve 216,218,220 and 222, so that from the guard section draw fluid of sampling probe (not shown), and in the direction of arrow, the fluid of absorption is sent to well annulus (not shown).Similarly, displacement unit 206 is fluidly connected to sample fluid pipeline 224 by flap valve 226,228,230 and 232, to for example from the sample part draw fluid of sampling probe, and the fluid of absorption is sent to for example sample chamber or container (not shown) in the direction of arrow.Contrary with the known system 100 of Fig. 1, exemplary pumping system 200 comprises displacement cell controller 234, the pressure that displacement cell controller 234 can be measured in protection and sample fluid pipeline 214 and 224 by corresponding pressure sensor 236 and 238, and adjust corresponding flow control valve 240 and 242 pressure reduction and the pump rate that are provided by displacement unit 204 and 206 are also provided automatically adaptively.More specifically, (for example open at least in part valve 240 and provide fluid passage between the chamber 244 and 246 of displacement unit 204, there is the shunt of selectable flow restriction), thereby reduce the pressure reduction being produced by displacement unit 204, and reduce effective pump rate of the displacement unit 204 for protecting fluid line 214.Similarly, open at least in part valve 242 and provide the fluid passage between the chamber 248 and 250 of displacement unit 206, thereby reduce the pressure reduction being produced by displacement unit 206, and reduce the effective pump rate for the displacement unit 206 of sample fluid pipeline 224.In the time that any one in valve 240 and 242 controllably operates, can add flow rate sensor, to monitor valuably the flow rate in sample fluid pipeline 224 and/or protection fluid line 214.
Therefore, in an example, chamber 244 and 246 can have and chamber 248 and 250 identical length, but can have different cross-sectional areas, to provide the intrinsic or basic pumping of expectation to distribute speed or pumping ratio between protection and sample fluid pipeline 214 and 224.In operation, (for example can use displacement cell controller 234, as feedback controller) the opening/closing degree of control valve 240 and 242 changes pressure reduction and the pump rate of displacement unit 204 and 206, so that obtaining the pump rate of expecting distributes or pumping ratio, and/or control (for example, reducing) strides across the pressure of the inside packer (not shown) of sampling probe.Compared with the known system 100 of Fig. 1, thereby the pressure reduction producing by displacement unit 204 and 206 and the pump rate being provided and pump rate distribute and can be changed, and needn't (for example change by the displacement unit for example removing and replace ground, replace) any and/or power supply (for example, power distribution) in displacement unit 204 and 206.
In addition, example system 200 has also been eliminated the minimum differntial pressure relevant with Fig. 1 known system 100 and pump rate restriction.Especially, the not exclusively characteristic of the motor of the mechanical realization based on displacement unit 204 and 206 and/or driver element 204 and 206 of the minimum differntial pressure of displacement unit 204 and 206 and/or pump rate.Instead, minimum differntial pressure and/or pump rate can be determined by the flow channel providing by valve 240 and 242.For example, the degree that valve 240 and 242 is opened is larger, chamber 244 and 246 and chamber 248 and 250 between flow restriction lower.In the time that the flow restriction between chamber reduces, the pressure reduction that strides across 204 and 206 generations of displacement unit also reduces.As a result, the attainable pressure reduction of the example system 200 of Fig. 2 A and the scope of pump rate are more much bigger than the scope of the possible pressure reduction of the known system of Fig. 1 100 and pump rate.
As mentioned above, can provide the pumping system 200 in the structure of for example low shake sampling technique in this description.But pumping system described here also can be used to anti-low shake sampling technique.In the example of Fig. 2 A, protection fluid line 224 is optionally fluidly connected to the back side of the sliding plunger in sample collector (not shown).
The example system 200 that Fig. 2 A describes can implement to reach same or analogous result in every way.For example, although two pressure sensors (, sensor 236 and 238) provide and protection and sample fluid pipeline 214 and 224 relevant feedback informations to displacement cell controller 234 as shown, but can replace two sensors with more or less such sensor.Additionally or alternatively, can working pressure sensor measurement fluid line 214 and 224 interior differences and/or the fluid pressure at additional some place.In addition, except or replace pressure sensor 236 and 238, can also use dissimilar sensor, for example liquid flow sensor.
Valve 240 and 242 can adopt be applicable to changing chamber 244 and 246 and chamber 248 and 250 between any fluid valve of flow channel.For example, metering type valve (for example, sliding bar plug valve, revolving valve is as ball valve, etc.), safety valve, or the combination of any other applicable valve or valve all can be used to implement valve 240 and 242.
The pressure reduction of the displacement unit 204 and 206 in the displacement unit block 202 in the example system 200 of mechanical synchronization and adaptively modifying Fig. 2 A and the ability of pump rate, can make example system 200 can adapt to more neatly formation characteristics different, that change and/or that be difficult to expectation, fluid type, drilling environment etc.More specifically, conditioned disjunction performance, such as the uncertainty in the local flow pattern on stratum, pollution transmission, the F invasion degree of depth, permeability, anisotropy and viscosity etc., can affect pressure reduction and the pump rate of displacement unit, under this pressure reduction and speed, two or protection probe provides the most effective fluid to separate.
In an example, system 200 can be set (for example, can programme to displacement cell controller 234) with the sample cleansing phase pumping in operation, at cleansing phase, the pump rate of displacement unit block 202 doubles with respect to being used for the pump rate of collection analysis sample.This pump rate doubling can with mix pumping pattern (fluid, sucking from sample and protection entrance is mixed or do not separate) use together.For example, after predetermined amount of time, the purity level that reaches expectation when the fluid of drawing from stratum (, level of pollution is low acceptably) time, maybe for example, when the purity level of expecting (is detected, with optical analysis) time, displacement cell controller 234 (for example regulates automatically, by valve 240 and 242) pressure reduction and the pump rate of displacement unit 204 and 206, distribute (pump rate that for example, reaches the fluid separation of expectation on the interface between sampling probe entrance and stratum distributes) to reach the pump rate of expectation.In addition, during sample cleansing phase (pump rate is relatively high therebetween) and sample generation pattern (acceptable pure sample is used for analysis subsequently therebetween), pressure in displacement cell controller 234 energy monitoring stream fluid lines 214 and 224, and provide suitable responsive control signal not exceed the level of the integrality that jeopardizes inner packer with the pressure (, striding across the pressure reduction of inner packer) of guaranteeing to stride across inner packer (not shown) and producing to valve 240 and 242.
Fig. 2 B is the schematic diagram of another selectable pumping structure 200 ', and this pumping structure 200 ' has two displacement unit blocks 202, and the fluid of extracting out here can be independently transported to one or two displacement unit.Speak briefly, the element of constructing 200 similar pumping structures 200 ' with pumping uses identical label.In addition, do not repeat for example valve 240 and 242 of some selectable units.In structure 200 ', fluid line 214 is not connected to the guard section of sampling probe, and fluid line 224 is not connected to the sample part of sampling probe.On the contrary, fluid line 214 and 224 is fluidly connected to fluid connector 260.Similarly, fluid connector 260 is fluidly connected to fluid line 214 ' and 224 '.Fluid line 214 ' and 224 ' can be fluidly connected to respectively guard section and the sample part of sampling probe successively.Fluid connector 260 can comprise one or more valve or current limiters that can be used to change the flow rate in fluid line 214 ' and/or 224 ', and more a step describes in detail below.
In the example shown, fluid connector 260 comprises four valves 261,262,263 and 264, controls respectively between fluid line 224 ' and 214, between 214 ' and 214, between 214 ' and 224 and flowing between 224 ' and 224.In the first exemplary operator scheme, close the valve 262 and 263 of fluid connector 260, open the valve 261 and 264 of fluid connector 260.In this operator scheme, by two displacement unit 204 and 206 draw fluid from fluid line 224 ', do not have fluid to draw from fluid line 214 '.Use the benefit of this operator scheme to be to apply high flow rate in sample entrance or the part of protection probe.In the second exemplary operator scheme, open the valve 262 and 263 of fluid connector 260, close the valve 261 and 264 of fluid connector 260.In this operator scheme, fluid is drawn from fluid line 214 ' by two displacement unit 204 and 206, does not have fluid to draw from fluid line 224 '.Use the benefit of this operator scheme to be to apply high flow rate in protection entrance or the part of protection probe.In the 3rd exemplary operator scheme, open the valve 261,262,263 and 264 of fluid connector 260.In this operator scheme, fluid is drawn from fluid line 214 ' and 224 ' by two displacement unit 204 and 206 simultaneously.Use the benefit of this operator scheme to be to reach at protection entrance and the sample entrance of protection probe the flow-rate conditions that reduces the pressure reduction that strides across protection entrance and sample entrance.In the 4th operator scheme, open the valve 262 and 264 of fluid connector 260, close the valve 261 and 263 of fluid connector 260.In this operator scheme, fluid is drawn from fluid line 214 ' by displacement unit 204, and fluid is drawn from fluid line 224 ' by displacement unit 206.Use the benefit of this operator scheme to be to reach at the protection entrance of protection probe and sample entrance the flow-rate conditions of the characteristic that meets respectively displacement unit 204 and 206.Should be appreciated that the object of these operator schemes that provide for illustrating, the layout and the number that are included in the valve in fluid connector 260 by handling the valve of fluid connector 260 and/or adjusting also can be realized other operator schemes as desired.
In sampling operation, from a kind of mode transitions to another kind of operator scheme, thereby the flow rate changing in fluid line 214 ' and/or 224 ' is useful.Under the control of displacement cell controller 234, for example sensor 236 of the sensor in a predefined manner or based on by instrument and 238 or other sensors measurement result of collecting guide this conversion.Displacement cell controller can automatically or be answered the order of terrestrial operation person's reception and be started conversion.In addition, it should be noted in the discussion above that the valve in fluid connector 260 can partly be opened or close to displacement cell controller in order to realize multiple operator schemes.For example, in another operator scheme, open the valve 261 and 264 of fluid connector 260, part is closed the valve 262 and 263 of fluid connector 260, causes the pressure drop between fluid line 214 ' and fluid line 224 '.
Fig. 3 is the schematic diagram that uses the exemplary focus sampling system 300 of the pumping structure enforcement with two displacement cellular systems.As described in Figure 3, have the two of protection ozzle, entrance or part 304 and sample ozzle, entrance or part 306 or protection sampling probe 302 and be set up and approach stratum 308, fluid sample is drawn also analyzed from stratum 308.Sampling probe 302 comprises concentric inside and outside packer 310 and 312, and it can be implemented with any tradition or known mode.
Except fluid line 314 and 316 is connected to displacement unit 324 and 326, fluid briquetting 318 also by output 330 and 332 from displacement unit 324 and 326, by-pass line 334 is transferred to fluid route piece 336, fluid route piece 336 can optionally be sent to fluid well annulus and/or sample collection system (not shown) successively.In order to control the operation of example system 300, provide displacement cell controller 338.Displacement cell controller 338 is similar or identical with the displacement cell controller 234 of Fig. 2 A-2B in describing.Therefore, displacement cell controller 338 can be configured to monitoring or (for example measure pressure in fluid line 314 and 316, by pressure sensor (not shown)), and the operation of controlling adaptively displacement unit block 328 is to change or the pressure reduction, pump rate and/or the pump rate that are provided by displacement unit block 328 to be provided and to be distributed.In addition, displacement cell controller 338 can be controlled fluid route piece 336, so that, for example, during sample purification pattern or the stage all fluids of drawing by sampling probe 302 are sent to well annulus, during sample collection pattern or the stage fluid of absorption is sent to well annulus and sample collection system.
Turn in more detail displacement unit block 328, displacement unit 324 is described as roller screw type pump.Although do not describe in Fig. 3, displacement unit 326 can be set to identical with displacement unit 324 or similar, can be also roller screw type pump.Or compared with displacement unit 324, displacement unit 326 can adopt different pump structures.As shown in Figure 3, displacement unit 324 comprises the piston 340 and 342 with sliding seal separately 344 and 346.Also by axle 348 mechanically or be operably connected, therefore, the rotation of response roller screw 350 unanimously or synchronously moves back and forth piston 340 and 342.The axle 352 of expanding from roller screw 350 supports by bearing 354 and 356, and drives through gearbox 360 by motor 358.As shown in Figure 3, displacement unit 326 can be connected with motor 358 through another gearbox 362.Alternatively, clutch can be used between motor 358 and gearbox 362, and/or between motor 358 and gearbox 360.
Gearbox 360 and 362 can be selected to the moment of torsion/speed characteristics of expectation are provided, and they can use fixing gear ratio (for example, reduction or n: 1 ratio) or continuous variable type to construct to implement.Motor 358 can be directly connected to gearbox 360 and 362, or, selectively, can be connected to gearbox 360 and 362 by clutch.In structure shown in Fig. 3, motor 358 can have twin shaft, and twin shaft is from the relative two ends expansion of motor 358, therefore, in the situation that not inserting clutch between motor 358 and gearbox 360 and 362, displacement unit 324 and 326 always operates in mechanical synchronization mode.In other words,, in the time that motor 358 operates, the axle of motor 358 makes 324 and 326 pumpings in a synchronous manner of displacement unit.But, use other structures of the clutch inserting between motor 358 and gearbox 360 and/or 362 to allow fully to control independently the pump rate of protection and sample fluid pipeline 314 and 316.For example, or although do not describe in Fig. 3, the motor (, similar or identical with motor 358) that displacement unit 324 and each in 326 can be by accordingly, separate drive.
For example, the example system 300 described in Fig. 3 can be used to provide sampling well system simultaneously.Especially, example system 300 can be implemented as for example part bottom hole assembly in instrument hack lever.In addition, example system 300 can be utilized the pressure reduction of its adaptively modifying displacement unit 324 and 326 and/or the ability of pump rate, within relatively short sample time, provide substantially pure or there is no the sample polluting, thereby reduce the possibility of blocking during drill-well operation.In one embodiment, displacement cell controller 338 can be controlled the pump rate of displacement unit 324 and 326 to reach their maximum horizontal in the incipient stage of sampling process, then regulate pump rate adaptively to obtain the sample fluid of minimum possibility level of pollution (, highest purity) within the short as far as possible time.In some instances, formation fluid (for example, provided by optical fluid analyser) pollution history can be used for regulating adaptively the pump rate of displacement unit 324 and 326 and pumping to distribute, with realize provide reach expectation or enough pump rate or the ratio of the sampling probe focus of low sample contamination level.
In example shown in Fig. 3, can be by the ratio of the certain for example gearbox 360 and 362 of mechanical parameter of adjusting, adjusting roller screw (for example, roller screw 350) pitch, the basic or intrinsic pump rate that displacement unit 324 and 326 is amassed to arrange in effective cross section that chamber (for example, chamber 320 and 322) is set.For the example of Fig. 3, to each of displacement unit 324 and 326, aforementioned displacement unit mechanical parameter can independently and therefore differently arrange, and distributes or ratio with the basic rate of realizing expectation.Gearbox 360 and 362 and displacement unit 324 and 326 between use clutch in the situation that, clutch can engage/separate and change operation cycle (, clutch can be used to change the operation cycle of displacement unit 324 and/or 326).Then the further adaptive change, pump rate and pump rate being distributed can change as previously discussed the pressure reduction that strides across displacement unit 324 and 326 and implements by controlling fluid briquetting 318.
Fig. 4 is another selectable displacement unit structure 400 of the exemplary displacement unit block 328 for implementing Fig. 3.Compared with the exemplary displacement unit block 328 of Fig. 3, example system 400 comprises two displacement unit 402 and 404, and displacement unit 402 and 404 drives via motor 406 by public gearbox 408 and axle 410.In example system 400, displacement unit 402 and 404, gearbox 408 and motor 406 can use the device similar or identical with device described in Fig. 3 above to implement.But, because displacement unit 402 and 404 shares public axle, thus single roller screw assembly and gearbox can be used, rather than two roller screw assemblies and two gearboxes must be provided.Therefore, mobile while synchronizeing with the reciprocating motion of single roller screw when what be provided to protection and sample fluid pipeline by example system 400, by changing the effective area of 402 and 404 interior chambers, displacement unit, regulate basic or intrinsic flow rate or pump rate and pump rate to distribute.Certainly,, for the example system 300 of Fig. 3, distribute further self adaptation adjusting to carry out by fluid briquetting 318 and displacement cell controller 338 as described above to pump rate and pump rate.
In another example, exemplary pumping system described here can be implemented with the actuator of the mixing change type for driving them.Particularly, for example can use and drive one of displacement unit by electric motor driven gearbox and roller screw as above in conjunction with Figure 3.Can be with mode hydraulic-driven another displacement unit similar to the displacement unit using in schlumberger modularization stratum dynamic test set (MDT).In this example, can drive gearbox and its relevant displacement unit and hydraulic oil pump (for example, fixed displacement hydraulic oil pump) with single electric motor, this hydraulic oil pump produces hydraulic oil and drives its relevant displacement unit.In addition, displacement disclosed herein unit is not limited to disclosed reciprocating piston, and can comprise and include but not limited to centrifugal pump or Moineau type pump in the displacement unit that can realize predetermined object of any type.If need, can use from the feedback of optical fluid analyser and/or flow meter and control pumping system.
Fig. 5 a, 5b and 5c have described the various tool layout that uses illustrative methods described here and equipment.In Fig. 5 a-5c, protect probe instrument preferably but not necessarily, approach as much as possible shaft bottom.Fig. 5 a has described the structure 500 of relative compact, this structure 500 comprises single power plant module from power to two displacement unit 504 and 506 or the part 502 of supplying with, displacement unit 504 and 506 can be arranged in a sleeve pipe 508, and can be similar with the example shown in Fig. 3 and Fig. 4.In Fig. 5 b, the second power plant module 510 is provided, be arranged in independent sleeve pipe 512 and 514 with the displacement unit 506 and 504 of their power plant modules 510 and 502 separately.In Fig. 5 c, displacement unit 504 and 506 is included in independent sleeve pipe 516 and 518, and sleeve pipe 516 also comprises protection probe instrument 520 here.In the diagram of Fig. 5 a-5c, sample fluid pipeline (not shown) is fluidly connected to the sample entrance that can expand to from protection probe instrument the protection probe of sample collector.Fluid in this fluid line can be drawn with displacement unit 506.Or in the diagram of Fig. 5 a-5c, protection fluid line (not shown) is fluidly connected to the protection entrance that can expand to from protection probe instrument the protection probe of the outlet (for example,, to drilling well) module 504.Fluid in this fluid line can be drawn with displacement unit 504.
Facility layout shown in Fig. 5 a-5c can be applied to any conveying device well known by persons skilled in the art equally.But, it should be noted in the discussion above that power plant module can be according to the available power supply of any specific conveying device and difference.For example, if power offers instrument by electric wire, power plant module can comprise curtage converter, and/or voltage overload protection.In other examples, can for example, provide power through the Fluid Circulation of piping (drilling rod hole) by turbine and alternating current generator.
The above-mentioned example that focuses on adaptively formation fluid sampling equipment and method utilizes displacement unit or displacement unit block, pressure reduction, pump rate and/or pumping ratio or distribution for displacement unit or displacement unit block can, by adaptively modifying, provide to compare known sampling equipment and method the sample purity (or the dustiness reducing) that sample purifies and increases faster.Usually, aforementioned exemplary equipment and method utilization (are for example connected to valve between the chamber of displacement unit, as shunt) fluid can for example, be flowed between (, recirculation path) in chamber, stride across the pressure reduction of chamber and the pump rate of displacement unit thereby change.Displacement cell controller (for example can be used to provide FEEDBACK CONTROL, by measuring fluid line pressure), thereby change pressure reduction and pump rate and realize the fluid of expecting and separate, reduce to stride across the pressure reduction of inner packer with the degree of control valve On/Off adaptively, etc.
But the effective discharge providing by aforementioned exemplary displacement unit is fixing (that is, can not adaptively changing) substantially, determined by the mechanical realization of these parts.In addition, in displacement unit (for example, known displacement unit and/or exemplary displacement described here unit) in situation about being driven by fluid pressure motor, the effective discharge that fluid pressure motor can also typically provide the substantially fixing mechanical realization by it to limit.Therefore, the displacement unit no matter arranging (is for example used as pump, as the absorption bottom fluid of discussing in conjunction with Fig. 1-5 above) or motor (for example, driving another to play the displacement unit of pumping action), these displacement unit all typically have substantially fixing discharge capacity.Therefore, traditionally, for example, when as pump (selecting, draw formation fluid) or when the displacement unit of motor, selection has the displacement unit of specific mechanical structure, and this mechanical realization provides basic or intrinsic pumping force, discharge capacity, the pump rate of expectation, etc.Result, for example, if (determined subsequently, attempt using it in the expectation application of displacement unit after) displacement unit can not provide enough (or providing too much) pumping force, discharge capacity, pump rate etc., instrument must be removed from drilling well, replace former displacement unit with a displacement unit with the different mechanical realization that acceptable performance is provided.
The method and apparatus of describing below in conjunction with Fig. 6-9 can be used to change the effective fluid displacement by the displacement unit of hydraulic pump and/or linear electric motor.With known (, fixed displacement) displacement unit compare, the displacement unit of describing below in conjunction with Fig. 6-9 provides multiple not isometric selectable piston chamber that have, and the effective discharge that the not co-content of piston chamber makes it possible to change displacement unit is to meet the needs of application-specific.By this way, single variable displacement unit can be configured to have multiple different effective discharges, to meet the needs of application of relative broad range.In addition, can or supply with power by the pump of fixed displacement or linear electric motor in conjunction with described exemplary variable displacement unit, Fig. 6-9, to selectable variable displacement and the flow rate that can not directly be provided by motor or the pump of fixed displacement are provided.According to Short Description above, the embodiment shown in Fig. 6-9 is described as at this single displacement unit 600,900 being driven by the axle 603 and 903 that is connected respectively to linear motor 601 and 901.Single displacement unit 600,900 also can be connected to second or complementary displacement unit by being connected to the same or analogous axle of motor, thereby realizes synchronous displacement unit.
Fig. 6 shows exemplary variable (, transformable discharge capacity and flow rate) the displacement unit 600 that is fluidly connected to linear motor 601 by axle 603.Linear motor 601 can be implemented by turning motor above-mentioned, gearbox and roller screw.In the time being used as pump, fluid line 602 can be fluidly connected to stratum, and fluid line 604 can be fluidly connected to tool interior, for example, comprises sample chamber, drilling well outlet etc. (not shown).Like this, displacement unit 600 can be used to extraction of formation fluid from stratum, for example protection or sample fluid, but complementary displacement unit (not shown) can extract other protection and sample fluid from stratum.Variable displacement unit 600 comprises the three-dimensional on-off valve V1-V4 that multiple independence is controlled.Variable displacement unit 600 also comprises piston rod 606 and piston 608,610 and 612, and piston rod 606 and piston 608,610 and 612 engage to form chamber 614,616,618 and 620 with casing or shell 613 slidably.As described in more detail below, in the time that piston 608,610 and 612 moves back and forth on substantially by arrow 622 indicated directions, can pass through the optionally filled chamber 614,616,618 and 620 of formation fluid in fluid line 602 for valve V1, V2, V3 and V4.In operation, motor 601 provides and makes axle 603 and piston rod 606 move back and forth required power or motion, to carry out pumping application.Can be with keeping wellbore pressure or hydraulic fluid filled chamber M1 and M2 a little more than wellbore pressure by expansion loop (not shown).
In illustrated example, piston rod 606 comprises having diameter d
1part I and there is diameter d
2second-phase to large part.As seen in Figure 6, diameter d
1and d
2difference cause the discharge capacity of chamber 614 and 616 to be different from the discharge capacity of (for example, being greater than) chamber 618 and 620.In addition, for the representative configuration shown in Fig. 6, the variable displacement of the discharge capacity official post unit 600 being caused by different diameter of piston rod can be set up (by control valve V1-V4) for two different effective discharges (or flow rate) are provided in reciprocating motion.More specifically, can can from fluid line 602, transmit hydraulic fluid by control valve V1-V4, so that the effective discharge of variable displacement unit 600 equals the summation (in the time that piston rod 606 moves to M1) of the discharge capacity of chamber 616 and 620, and the summation of the discharge capacity of chamber 614 and 618 (in the time that piston rod 606 moves to M2).Or, can control valve V1-V4 so that the effective discharge of variable displacement unit 600 equals the discharge capacity of chamber 616 and 618 poor (in the time that piston rod 606 moves to M1), and the discharge capacity of chamber 614 and 620 poor (in the time that piston rod 606 moves to M2).In addition, thereby can in a direction of motion of piston rod 606, provide larger effective discharge (, discharge capacity summation) by control valve V1-V4, relatively low effective discharge (, discharge capacity is poor) is provided in another direction of motion.
In example illustrated in fig. 6, variable displacement unit 600 is to move back and forth unit.But in other embodiments, variable displacement unit 600 can be rotary unit.In addition, although displacement unit 600 is described to be connected to motor 601 and axle 603,, in other embodiments, displacement unit 600 can be connected to hydraulic pressure (for example, fixed displacement) pump (not shown).For example, chamber M1 and M2 can be used to provide the needed power of draw fluid or pressure from stratum, thereby have eliminated the needs to motor 601 and axle 603.
Fig. 7 is the chart that the various operator schemes that can be provided by the exemplary variable displacement unit 600 of Fig. 6 are described.As shown in Figure 7, have four kinds of different operator schemes in table, each is by unique configuration definition of valve V1-V4.In pattern 1, for example, valve V1 is set to fluid can flow to port one and chamber 614 from port C, valve V2 is set to fluid can flow to port 2 and chamber 616 from port C, valve V3 is set to fluid can flow to port one and chamber 618 from port C, and valve V4 is set to fluid can flow to port 2 and chamber 620 from port C.In this example, suppose that chamber 614 and 616 provides discharge capacity " L ", suppose that chamber 618 and 620 provides discharge capacity " S ", S is less than L here.Thereby, in pattern 1, in the formation fluid flowed into chamber 616 and 620 in fluid line 602, promote that piston rod 606 moves to chamber M1 direction.In addition, in pattern 1, the effective discharge of variable displacement unit 600 equals the discharge capacity summation (, L+S) of chamber 616 and 620.In addition, pattern 2 is provided for the effective discharge L-S that piston rod moves in the direction of M1, and mode 3 is provided for the effective discharge L+S that piston rod moves in the direction of M2, and pattern 4 is provided for the effective discharge L-S that piston rod moves in the direction of M2.
Fig. 8 has described another variable displacement unit structure 800 that two additional (four altogether) effective discharges are provided.Usually, structure 800 comprises variable displacement unit structure 600 and four additional three-way valve V5, V6, V7 and the V8 of Fig. 6.Valve V5 and V6 can be set to make can walk around chamber 614 and 616 so that effective flow rate S to be provided from the fluid of fluid line 602, or, valve V7 and V8 can be set to can bypass chamber 618 and 620 so that effective flow rate L to be provided.Therefore,, for the representative configuration 800 of Fig. 8, on the both direction that valve V1-V8 can be set to move at piston rod 606, (, in reciprocating direction) provides effective flow rate L, S, L-S and L+S.Although the representative configuration 800 of Fig. 8 has been described four additional three-way valves, if but needed, can only use two additional three-way valves (, V5 and V6 or V7 and V8) that additional (three altogether) are only provided effectively flow rate.In addition, it will be appreciated by those skilled in the art that some or all of three-way valve V1-V8 can implement to the combination of valve and flap valve or other various valves that identity function is provided with two.
Fig. 9 has schematically described in conjunction with the variable displacement unit structure 900 that exceedes four chambers.As shown in Figure 9, representative configuration 900 can comprise that the chamber of any desired number, relevant fluid route and bypass valve are to realize the different effective discharges of any desired number.
Figure 10 has described another variable displacement unit structure 1000a.Particularly, Figure 10 has described the Part I 1000a that can be used in combination to produce with Part II 1000b the first displacement unit 1000.Utilize the Part II 1000b adding, for example, by axle 1003 or by directly attached, displacement unit 1000 provides continuous flowing by utilizing some additional valves as shown in Figure 2 A to operate.
In addition, displacement unit 1000 can connect second or complementary displacement unit by for example axle 1003, thereby realizes synchronous displacement unit.Like this, displacement unit 1000 can be used to extraction of formation fluid from stratum, for example protection or sample fluid, and complementary displacement unit (not shown) can extract other protection or sample fluid from stratum.Exemplary displacement unit 1000 shown in Figure 10 can for example be used to implement in conjunction with described displacement unit, Fig. 2-5.Usually, arrange that exemplary part 1000a regulates its effective discharge or the flow rate of the sample fluid drawn from stratum.
Turn in detail Figure 10, exemplary part 1000a comprises multiple piston displacements unit 1002,1004,1006 and 1008, and each piston displacement unit provides different flow rates.As described in Figure 10, piston displacement unit 1002,1004,1006 is mechanically connected each other (for example, link) and connects common axis 1003 with 1008.In the time that axle 1003 is moved to the left in the example shown, in the mode of consistent or mechanical synchronization, each of piston displacement unit 1002,1004,1006 and 1008 is by corresponding flap valve 1014,1016,1018 and 1020 draw fluid from inlet fluid pipeline 1012.In the time that axle 1003 is retracted the right in the example shown, previously under pressure, promoted enter outlet fluid line 1022 by corresponding flap valve 1024,1026,1028 and 1030 by the fluid of displacement unit 1002,1004,1006 and 1008 inspirations.In operation, in displacement unit 1002,1004,1006 and 1008 is provided for the pressure of sample fluid and/or best (for example, substantially preferred) discharge capacity of flow rate.But, those displacement unit 1002,1004,1006 and 1008 that best discharge capacity is not provided (for example, only have one) can continue in part 1000b withdrawn fluid between their corresponding corresponding units, to avoid producing any unnecessary pressure in the unit not using.Similarly, any one in parts 1002-1008 can be used for combination to obtain multiple flow rate and/or pressure.
Figure 11 is the schematic diagram of exemplary process applicator platform 1100, and processor platform 1100 can be used to and/or be programmed to implement any or all exemplary apparatus described here and method.Particularly, exemplary process applicator platform 1100 can be used to implement the exemplary displacement cell controller 338 in exemplary displacement cell controller 234 and/or Fig. 3 of Fig. 2 A-2B.In addition, processor platform 1100 can be by enforcements such as one or more general processors, processor core, microcontrollers.
The processor platform 1100 of the example of Figure 11 comprises the processor 1105 of at least one general programmable.Processor 1105 is carried out the coded command 1110 and/or 1112 of the main storage interior (for example,, in RAM 1115 and/or ROM 1120) of processor 1105.Processor 1105 can be the processing unit of any type, for example processor core, processor and/or microcontroller.In other side, processor 1105 can be carried out exemplary process described here, for example, controls adaptively the level of pollution that one or more displacements unit carrys out extraction of formation fluid sample and/or reduces more quickly formation fluid sample.Processor 1105 is communicated by letter with main storage (comprising ROM 1120 and/or RAM 1115) by bus 1125.RAM 1115 can implement by the ram set of DRAM, SDRAM and/or any other type, and ROM can implement by the storage arrangement of flash memory and/or any other desired type.Can pass through the control of Memory Controller (not shown) to the access of memory 1115 and 1120.
At above-mentioned some examples that there is shown, and to its detailed description.In the description of these examples, similar or identical reference number is used to represent same or similar element.For clear and for simplicity, figure needn't be proportional, and some views can be exaggerated demonstration in proportion or schematically.Although described certain methods, equipment and manufacture main points here, scope of the present invention is not limited to this.On the contrary, the present invention comprises all methods, equipment, the manufacture main points in the scope that falls into right and equivalent thereof.
Claims (15)
1. an equipment that comprises the downhole tool with displacement unit block, comprising:
Described downhole tool, is configured to carry out and carry in the well that extends to subsurface formations, and described downhole tool comprises:
Sampling probe, is configured to be connected to subsurface formations and from subsurface formations draw fluid sample;
Described displacement unit block, comprising:
Multiple chambers, comprise two the first Room and two the second Room; And
First piston and the second piston, described first piston and described the second piston are connected to axle, first piston and the second piston synchronous in the time that axle moves are moved, wherein: first piston is by relative to each other fluid isolation of the first Room, and the second piston is by relative to each other fluid isolation of the second Room;
First fluid pipeline, fluid is connected to each in the first Room;
Second fluid pipeline, fluid is connected to each in the second Room;
The first metering valve and the second metering valve, described the first metering valve is suitable for changing the flow path between the first Room between fully open position and complete shut-down position, and described the second metering valve is suitable for changing the flow path between the second Room between fully open position and complete shut-down position; And
Fluid briquetting, fluid is connected between sampling probe and the first and second fluid lines.
2. equipment as claimed in claim 1, wherein the first metering valve is configured to change the fluid pumping speed in first fluid pipeline by change the first differential pressure forming between the first Room, and the second metering valve is configured to change the fluid pumping speed in second fluid pipeline by change the second differential pressure forming between the second Room.
3. equipment as claimed in claim 1, also comprises the displacement cell controller of controlling the first metering valve and the second metering valve.
4. equipment as claimed in claim 3, wherein said downhole tool comprises described displacement cell controller.
5. equipment as claimed in claim 3, wherein said displacement cell controller is configured to control at least one in the first metering valve and the second metering valve to change adaptively the ratio of the fluid pumping speed in fluid pumping speed and the second fluid pipeline in first fluid pipeline.
6. equipment as claimed in claim 1, wherein said first piston and the second piston are contained in the single casing of displacement unit block.
7. equipment as claimed in claim 1, wherein said displacement unit block comprises the first displacement unit and the second displacement unit, and wherein the first Room is associated with the first displacement unit, and the second Room is associated with the second displacement unit.
8. equipment as claimed in claim 7, further comprises the motor that is configured to simultaneously operating the first displacement unit and the second displacement unit.
9. equipment as claimed in claim 8, also comprises the gearbox that motor is connected to the first displacement unit and the second displacement unit.
10. equipment as claimed in claim 1, wherein first fluid pipeline is in protection fluid line and sample fluid pipeline, and second fluid pipeline is another in protection fluid line and sample fluid pipeline.
11. 1 kinds comprise the equipment of the downhole tool with displacement unit block, comprising:
Described downhole tool, is configured to carry out and carry in the well that extends to subsurface formations, and described downhole tool comprises:
Sampling probe, is configured to be connected to subsurface formations and from subsurface formations draw fluid sample;
Described displacement unit block, comprising:
The first displacement unit, has two the first Room that separated by first piston;
The second displacement unit, has two the second Room that separated by the second piston; And
Axle, described axle connects first piston and the second piston first piston and the second piston synchronous when axle is moved and moves;
Motor, is configured to simultaneously operating the first displacement unit and the second displacement unit;
First fluid pipeline, fluid is connected to each in the first Room;
Second fluid pipeline, fluid is connected to each in the second Room;
The first metering valve, is suitable for changing the flow path between the first Room between fully open position and complete shut-down position;
The second metering valve, is suitable for changing the flow path between the second Room between fully open position and complete shut-down position;
Displacement cell controller, be configured to control the first metering valve and the second metering valve, and control at least one in the first metering valve and the second metering valve to change adaptively the ratio of the fluid pumping speed in fluid pumping speed and the second fluid pipeline in first fluid pipeline; With
Fluid briquetting, fluid is connected between sampling probe and the first and second fluid lines.
12. equipment as claimed in claim 11, wherein the first metering valve is configured to change the fluid pumping speed in first fluid pipeline by change the first differential pressure forming between the first Room, and the second metering valve is configured to change the fluid pumping speed in second fluid pipeline by change the second differential pressure forming between the second Room.
13. equipment as claimed in claim 11, wherein said first piston and the second piston are contained in the single casing of displacement unit block.
14. equipment as claimed in claim 11, also comprise the gearbox that motor is connected to the first displacement unit and the second displacement unit.
15. equipment as claimed in claim 11, wherein first fluid pipeline is in protection fluid line and sample fluid pipeline, and second fluid pipeline is another in protection fluid line and sample fluid pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810090016.0A CN101550828B (en) | 2008-03-31 | 2008-03-31 | Device and method for implementing focus sampling of reservoir fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810090016.0A CN101550828B (en) | 2008-03-31 | 2008-03-31 | Device and method for implementing focus sampling of reservoir fluid |
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| CN101550828A CN101550828A (en) | 2009-10-07 |
| CN101550828B true CN101550828B (en) | 2014-05-21 |
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| CN200810090016.0A Expired - Fee Related CN101550828B (en) | 2008-03-31 | 2008-03-31 | Device and method for implementing focus sampling of reservoir fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102419271B (en) * | 2011-12-16 | 2013-01-09 | 中国海洋石油总公司 | Embedded focusing probe |
| CN103174414B (en) * | 2013-03-26 | 2016-07-13 | 中国地质调查局水文地质环境地质调查中心 | Original position fluid sampling apparatus in a kind of deep-well well |
| GB2519129A (en) * | 2013-10-10 | 2015-04-15 | Ide Technologies Ltd | Pumping Apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3459363A (en) * | 1967-12-21 | 1969-08-05 | United States Steel Corp | Valve-unloading mechanism for reciprocating pumps |
| US4272226A (en) * | 1979-01-08 | 1981-06-09 | Osborne Harry E | Fluid pump and method for operating same |
| US6301959B1 (en) * | 1999-01-26 | 2001-10-16 | Halliburton Energy Services, Inc. | Focused formation fluid sampling probe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859850A (en) * | 1973-03-20 | 1975-01-14 | Schlumberger Technology Corp | Methods and apparatus for testing earth formations |
| US4860581A (en) * | 1988-09-23 | 1989-08-29 | Schlumberger Technology Corporation | Down hole tool for determination of formation properties |
| DE4411266C2 (en) * | 1994-03-31 | 2001-05-17 | Danfoss As | Analysis method and device |
| US7124819B2 (en) * | 2003-12-01 | 2006-10-24 | Schlumberger Technology Corporation | Downhole fluid pumping apparatus and method |
-
2008
- 2008-03-31 CN CN200810090016.0A patent/CN101550828B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3459363A (en) * | 1967-12-21 | 1969-08-05 | United States Steel Corp | Valve-unloading mechanism for reciprocating pumps |
| US4272226A (en) * | 1979-01-08 | 1981-06-09 | Osborne Harry E | Fluid pump and method for operating same |
| US6301959B1 (en) * | 1999-01-26 | 2001-10-16 | Halliburton Energy Services, Inc. | Focused formation fluid sampling probe |
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