CN101403296A - Delamination pressure testing method for oil well without stop production - Google Patents
Delamination pressure testing method for oil well without stop production Download PDFInfo
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- CN101403296A CN101403296A CNA2008102305579A CN200810230557A CN101403296A CN 101403296 A CN101403296 A CN 101403296A CN A2008102305579 A CNA2008102305579 A CN A2008102305579A CN 200810230557 A CN200810230557 A CN 200810230557A CN 101403296 A CN101403296 A CN 101403296A
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Abstract
The invention discloses a layering pressure measurement method when an oil-field does not stop production, which comprises the steps: (1) a layering pressure measurement working barrel is put into a well a downhole sleeve barrel in a hand releasing manner and fixed, a plurality of downhole layering packers are used for sealing between the layering pressure measurement working barrel and the downhole sleeve barrel and each working barrel unit of the layering pressure measurement working barrel is led to correspond to the position of each formation; (2) a pressure measurement device comprising a sealing part and a pressure measurement element is put into the well from the decentralized wellhead of an oil well, the pressure measurement element of the pressure measurement device is led to be butt-jointed with a pressure measurement filtered solution hole of a working barrel unit, the sealing part seals the axial through holes at two sides of the filtered hole, the pressure measurement element tests and obtains the parameters of the oil well through the pressure measurement filtered hole, an axial bridge type overflowing channel of the working barrel unit provides the allowance of passing through of the oil of other layers; and (3) when the testing is finished, the pressure measurement device can be put into a working barrel unit corresponding to another layer of formation so as to carry out the sealing and pressure measurement of the working barrel unit corresponding to another target layer.
Description
Technical field
The invention belongs to a kind of delaminating pressure testing process of oil field development dynamic monitoring aspect.
Background technology
The east old filed has all entered the exploitation middle and later periods mostly, the oil well interlayer contradiction is increasingly sharpened, the oilfield exploitation difficulty continues to increase, comprehensive water cut constantly raises, the three big contradictions in oil field are more and more outstanding, also face the reserved resources deficiency simultaneously, take over difficult severe situation, the emphasis that oil field development is taped the latent power is on the basis of thick oil pay segmentation exploitation, change to non-main layer by main layer, need the data such as zonal pressure of each producing zone to come assay field produces situation, to satisfy the needs of taping the latent power in the oil field, for the comprehensive adjustment in oil field provides the important basis parameter.
Because the oil-well strata manometric technique is not caught up with the variation of oil field segmentation production technique, the pressure that the strata pressure of monitoring remains full well changes, can't monitor the zonal pressure of each producing zone, and when multilayer is produced, each interlayer pressure certainly exists difference, makes full well surveying press that value is less as a result; Both having made indivedual oil wells is the zonal pressure of obtaining each producing zone of oil well, then need to carry out special underground work, pressure measurement stops production, and this special pressure measurement work should increase the underground work expense, stop production again and influence well oil output, thereby the quantity of carrying out is few, do not satisfy oil field development production and dynamic monitoring requirements of one's work far away yet, Chinese patent (200510098286.2) disclosed " method of sampling of a kind of laminated distributor under well and pressure measurement " for example, the test string of will giving up after this method needs oil well to stop production is anchored on the corresponding test zone position of test purpose layer, restart and carry oily equipment and make the oil well operate as normal, finish this target zone test and sampling with the sampling tester that places the test string of giving up, though this method can be after being lowered to the test string of giving up, change different testers and finish multiple work by dragging for the throwing mode, but all need to stop production earlier to drag for to throw the test string of giving up before each test or when changing the test purpose layer, thereby can not realize the delaminating pressure testing that do not stop production.
Summary of the invention
The object of the present invention is to provide a kind of delamination pressure testing method for oil well without stop production.
Technical scheme of the present invention is: a kind of delamination pressure testing method for oil well without stop production, and this method may further comprise the steps:
(1) it is also fixing to be lowered to the delaminating pressure testing seating nipple that is connected and composed from beginning to end by more piece seating nipple unit in the mode of giving up in the sleeve of down-hole, after being lowered to, no longer takes out by the delaminating pressure testing seating nipple, between delaminating pressure testing seating nipple and the down-hole sleeve with the shutoff of a plurality of laminated distributor under well packer, each packer is arranged at the both sides up and down of each oil reservoir, and make the delaminating pressure testing seating nipple respectively to save the seating nipple unit corresponding with the position on each stratum respectively; Be provided with in the described seating nipple unit and hold the axially extending bore that connects mutually up and down that pressure tester passes through, the barrel of each seating nipple unit is provided with to feed from the outside presses the pressure measurement liquid pass hole radially that communicates with ground in the axially extending bore, also is provided with the axial bridge-type flow channels that does not communicate with the pressure measurement liquid pass hole in each seating nipple unit;
(2) decentralized wellhead from oil well is lowered to the pressure tester that comprises seal member and load cell, in the axially extending bore of the seating nipple unit of the tested stratum correspondence under the pressure tester in the delaminating pressure testing seating nipple, make then load cell in the pressure tester dock with pressure measurement liquid pass hole radially in the seating nipple unit, place, by the axially extending bore of seal member shutoff pressure measurement liquid pass hole both sides, load cell in the pressure tester measures oilwell parameter by the pressure measurement liquid pass hole, and the axial bridge-type flow channels in pressure measurement while seating nipple unit continues to pass through for the oil of other oil reservoir;
(3) test of pressure tester finishes, can continue with under the pressure tester in pairing seating nipple unit, another layer stratum, implement another target zone to the shutoff pressure measurement of seating nipple unit, perhaps salvage pressure tester and go out the pressure measurement seating nipple, take out through annular space, the decentralized wellhead of oil jacket.
The top of described delaminating pressure testing seating nipple has the horn mouth that upwards enlarges.
Described pressure tester is pressure measurement blanking plug+pressure gauge.
Described pressure tester is the direct-reading delamination pressure gauge, this direct-reading delamination pressure gauge comprises and is used for the Malong pipe nipple that is connected with the cable of going into the well and the pressure measurement part of connection thereof, described pressure measurement partly comprises strata pressure pressure measurement pipe nipple, it is characterized in that: also be provided with controlled packoff nipple on the described measuring cell, controlled orientation spool and be used for control sealing, the control section of orientation spool action, described control section comprises the spread of the rumours pipe nipple that is used for the production wells number of deeply convinceing, wireless signal transceiver and location, seal control device, described controlled packoff nipple are provided with the pressure tap that communicates with the pressure nozzle of strata pressure pressure measurement pipe nipple.
Described packoff nipple comprises cylindrical outer casing, slip cap is located at the sliding sleeve on the cylindrical outer casing outer wall in pairs, be installed in the sliding sleeve driving mechanism in the cylindrical outer casing, fixed cover is loaded on the sealing shroud on the cylindrical outer casing outer wall in pairs, described sealing shroud has the elasticity enlarging of bowl-mouth shape, the elasticity enlarging of described sealing shroud and sliding sleeve are oppositely arranged also and leave between the cylindrical outer casing and can insert to strut the gap on its elasticity enlarging lip limit for sliding sleeve, two clutch ends that the direction of motion that described sliding sleeve driving mechanism has paired setting is opposite, cooperate with the corresponding transmission of two sliding sleeves of paired setting respectively, described pressure tap is arranged on the cylindrical outer casing of the packoff nipple between the paired sealing shroud.
Described sliding sleeve driving mechanism is made of the screw-nut body that motor reaches the clutch end lifting vertically that is connected with drive of motor, described screw-nut body comprises that turn-screw reaches and the transmission nut of the paired setting of its threaded engagement, the thread rotary orientation of two transmission nuts that are provided with is opposite in pairs, described turn-screw is connected with drive of motor by transmission connection piece, two transmission nuts of described paired setting respectively with the corresponding connection of two sliding sleeves of paired setting, offer the axial groove that interts and move vertically for the part that links to each other of transmission nut and sliding sleeve on the described cylindrical outer casing.
Described sealing shroud is a leather cup, and described sliding sleeve is to insert the closing in tapered sleeve that cooperate with the elasticity enlarging of leather cup with the opposite end of leather cup.
Described controlled orientation spool comprises cylindrical case, be installed in the cylindrical case locating detent driving mechanism, pawl body rotate the floating one or more locating detent of putting on the cylindrical case outer wall of the pawl end that is assemblied in the cylindrical case, and the clutch end of described locating detent driving mechanism cooperates with the power intake transmission of the wobbling action of locating detent.
Described locating detent driving mechanism is made of the screw-nut body of motor and motor-driven exportable axial power, described locating detent is provided with and can makes the open spring of locating detent, the clutch end of described screw-nut body can corresponding Contact Transmission with the locating detent tail end cooperate in its axial lifting travel, its matching relationship is: but pushing tow locating detent tail end reclaims the pawl end of locating detent when the clutch end of screw-nut body rises, pushing tow locating detent tail end no longer when the clutch end of screw-nut body descends, locating detent is opened by spring force; Described screw-nut body is to be made of the transmission nut by screw fit on drive screw that is connected with drive of motor and the drive screw, what described transmission nut was provided with restriction transmission nut rotation only revolves position limiting structure, and the top of transmission nut is provided with the pushing tow termination with locating detent tail end corresponding matching.
The described position limiting structure that only revolves is key, groove fit structure or non-circular shaft, a hole fit structure between transmission nut and cylindrical case; Described locating detent is provided with in pairs, and described spring is mounted between the relative inner of pawl end of two paired locating detents.
Oil well without stop of the present invention is taken out the delaminating pressure testing technology method and is had under oil well without stop product situation, each target zone is carried out delaminating pressure testing, when obtaining the measure formulation of following step of oil well, project setting required information, avoided the influence of pressure measurement work to other producing zone of oil well; After the underground work, can repeatedly carry out delaminating pressure testing, reduce the underground work workload, save the underground work expense; By manufacturing parameter analysis, when recording each target zone pressure parameter, realize the understanding stratum, carry out the multistage technical characterstics such as purpose that repeat to look for water blockoff each substratum in the pressure measurement process; The successful Application of the inventive method, solved for a long time that delaminating pressure testing accounts for product, increased the problem of underground work expense, when not influencing the production of other layer of oil well, each substratum is carried out pressure buildup test, in the pressure measurement process, also can make analysis, for the measure formulation of following step of oil well, project setting provide full and accurate data to the occurrence of each substratum; To the outstanding oil well of interlayer contradiction, when measuring pressure data, also reached the purpose of this layer of shutoff, can realize the multistage water blockoff that repeats to look for; Direct-reading delaminating pressure testing technology can measure the zonal pressure recovery curve in real time, shortens the testing time.Obtaining of oil well delamination pressure data is for the schematic design of oil well analysis and science provides reliable data foundation.
In addition: owing to adopted the technical scheme of direct-reading delamination pressure gauge, topology layout form of the present invention has following characteristics:
A) can strut locating detent and leather cup in the rotation of the motor in electronic orientation spool of Ground Control and the electronic packoff nipple, realize the accurate location and the sealing of test layer position, isolate strata pressure and full well pressure, realize the long term monitoring of strata pressure;
B) acquisition of zonal pressure value makes that for geology department provides the data that higher-value is arranged geology department can take correctly, effective measures, improves oil recovery factor to greatest extent.
Oil well delamination pressure gauge of the present invention is applicable to the occasion of conventional oil, well pressure test.
Description of drawings
Structural representation when Fig. 1 is delaminating pressure testing of the present invention work;
Fig. 2 is the structural representation of the seating nipple unit of delaminating pressure testing seating nipple of the present invention;
Fig. 3 is the schematic diagram of the interior pipe on the seating nipple of the present invention unit;
Fig. 4 is the high low level locating slot among Fig. 3 and the expanded view of rotation transposition gathering sill;
Fig. 5 is the structural representation when work of the present invention;
Fig. 6 is the structural representation of electronic packoff nipple of the present invention;
Fig. 7 is the A-A sectional view of Fig. 6;
Fig. 8 is the structural representation of electronic orientation spool of the present invention.
The specific embodiment
As shown in Figure 1, oil well without stop produces the activities of delaminating pressure testing technology method, may further comprise the steps:
(1) in down-hole sleeve 41, is lowered to delaminating pressure testing seating nipple and fixing in the mode of giving up, between delaminating pressure testing seating nipple and the down-hole sleeve 41 with a plurality of laminated distributor under well packer 42 shutoff, each packer 42 is arranged at the both sides up and down of each oil reservoir, and make the delaminating pressure testing seating nipple respectively to save seating nipple unit 43,44,45 corresponding with the position of each oil reservoir 46,47,48 respectively, no longer take out after the delaminating pressure testing seating nipple is lowered to.
(2) by the cable well testing truck, 51 is cable, be lowered to pressure tester 50 from decentralized wellhead 49, pressure tester can be pressure measurement blanking plug and pressure gauge or direct-reading delamination pressure gauge, the pressure tester 50 times tested target zone in the delaminating pressure testing seating nipple---in the oil reservoir 46 pairing seating nipple unit 43, realize the location, pressure tap in the pressure tester 50 is docked with pressure measurement liquid pass hole 16 radially in the seating nipple unit, place and realize being sealed and matched, thereby tested target zone is only communicated and isolated with the delaminating pressure testing seating nipple with the pressure tap of pressure tester, the load cell in the pressure tester measures the oil well delamination temperature by pressure tap, pressure build-up curve; Axial bridge-type flow channels in the seating nipple unit can continue to pass through for the oil of other oil reservoir, is implemented under other oil reservoir ordinary production situation the delaminating pressure testing to tested layer.
(3) test of pressure tester finishes, can implement next target zone to the shutoff pressure measurement of seating nipple unit, salvage by the cable well testing truck and to go up pressure tester and go out the pressure measurement seating nipple, take out through annular space, the decentralized wellhead 49 of oil jacket 41.
If pressure tester is pressure measurement blanking plug and pressure gauge, the pressure gauge stored parameters can be carried out playback on ground, reads target zone pressure and recovers and temperature curve; If pressure tester is the direct-reading delamination pressure gauge, can directly be read the recovery of measured layer strata division pressure, full well stream dynamic pressure and temperature curve by ground control system by cable.
Delaminating pressure testing seating nipple structure such as Fig. 1, shown in Figure 2, press corresponding seating nipple unit 43 by a plurality of with each layer ground, 44,45 head and the tail connect and compose, each middle part, seating nipple unit is provided with and holds the axially extending bore that connects mutually up and down that pressure tester passes through, the barrel of each seating nipple unit is provided with to feed from the outside presses the pressure measurement liquid pass hole 116 radially that communicates with ground in the axially extending bore, described packer 42 is set on the barrel of delaminating pressure testing seating nipple of each pressure measurement liquid pass hole 116 both sides, also be provided with the axial bridge-type flow channels 120 that does not communicate with pressure measurement liquid pass hole 116 in each seating nipple unit, bridge-type flow channels 120 in each seating nipple unit provides the produce oil passage for the seating nipple unit of other layers, other pressure measurement seating nipples except the seating nipple unit of tested layer can be worked on, unaffected.The top of delaminating pressure testing seating nipple has the horn mouth that upwards enlarges, and is convenient to pressure tester 50 and enters.
The structure of seating nipple unit such as Fig. 2, Fig. 3, shown in Figure 4, comprise, in, lower joint sleeve 113,111,104 urceolus that link to each other and form, the top connection 114 that is connected of upper joint sleeve 113 upper ends, the affixed lower contact 101 in lower joint sleeve 104 lower ends, be fixed with positioning pipe 112 between upper joint sleeve 113 and the middle adapter sleeve 111, the inwall of last positioning pipe 112 is provided with locating slot 115, be fixed with the liquid main body 106 excessively of tubulose between middle adapter sleeve 111 and the lower joint sleeve 104, cross and have the radially pressure measurement liquid pass hole 116 that connects the seating nipple urceolus in the liquid main body 106, and the axial bridge-type flow channels 120 that is provided with of the off-centre of walking around pressure measurement liquid pass hole 116 radially, cross the outer wall of liquid main body 106 and the junction of middle adapter sleeve 111 and lower joint sleeve 104 and be set with liquid body seal circle 108, cross liquid main body 106 upper ends and be fixed with guide pipe 110, the little horn mouth of outer imperial palace that is provided with suitable for reading of last guide pipe 110, cross pipe 105 in axially slidable fit has in the inner orifice of liquid main body 106, in pipe have the corresponding interior pipe liquid pass hole 117 of the pressure measurement liquid pass hole 116 with on crossing liquid main body 106 radially that connects tube wall in 105, interior pipe liquid pass hole 117 both sides are provided with sealing ring, in also be set with on pipe 105 the outer wall and pressure measurement liquid pass hole 116 corresponding two place's close encapsulation circles 107 when the not conducting, the lower end of interior pipe 105 is fixed with down guide pipe 102, be top-loaded with spring 103 between the lower end of the tube wall lower end of following guide pipe 102 and mistake liquid main body 106, the end opening of following guide pipe 102 is provided with the little horn mouth of outer imperial palace, and the inwall of following guide pipe 102 is provided with down locating slot 118.
Cross between liquid main body 106 and the interior pipe 105 and be provided with axial locking mechanism, this axial locking mechanism is to reach the high low level locating slot 119 that is clasped with pin 109 by pin 109, the rotation transposition gathering sill 121 that is oppositely arranged with high Lower tank, elasticity was connected in and was used for the spring 103 that coupling mechanism force is replied between liquid main body 106 and the interior pipe 105, described pin 109 was convexly set in pressure measurement liquid pass hole 116 tops on liquid main body 106 inwalls, described high low level locating slot 119 is arranged on the outer wall of interior pipe 105 along circumference, the height that alternately enters by the held pin 109 that alternately occurs, Lower tank and between the connection inclined tooth constitute, described rotation transposition gathering sill 121 is relatively arranged on high low level locating slot 119 belows along circumference, be connected with high between each rotation transposition gathering sill 121, inclined-plane tooth between the Lower tank tilts in the same way, the inclined-plane tooth that crown is relative, on, the crown of lower inclined plane tooth all axially aligning to the incline position of inclined-plane tooth.Two axial locations that this axial locking mechanism locked are corresponding respectively crosses docking and not docking two states of liquid main body 106 and interior pipe 105 both liquid pass holes.
Seating nipple of the present invention unit in use, when carrying out delaminating pressure testing, the direct-reading delamination pressure gauge positions by the locating slot 115 of last location main body 112, the interior pipe liquid pass hole 117 of the pressure tap of measuring cell and interior pipe 105, cross pressure measurement liquid pass hole 116 on the liquid main body 106 and communicate and guaranteed the parameatal sealing of liquid, and carry out pressure measurement.The oil of other layers can not influence the ordinary production of other layers from crossing bridge-type flow channels 120 circulations on the liquid main body 106 when pressure measurement.When after pressure measurement is finished, needing to carry out water blockoff, transfer on the measuring cell and make in the locating slot 118 of its following guide pipe 102 that is positioned at seating nipple, with having gone up in the process of cable that measuring cell connects, the interior pipe 105 that guide pipe 102 was connected under positioner on the measuring cell drove is up, reach at pin 109, under the acting in conjunction of lower tooth, pin 109 can be in the (see figure 2) that replaces in elongated slot and short groove of tooth on the interior pipe 105, when pin 109 in elongated slot, the interior pipe liquid pass hole 117 of interior pipe 105 overlaps with the pressure measurement liquid pass hole 116 of crossing liquid main body 106 and communicates, when pin 109 is being lacked in the groove, described two liquid pass holes 116,117 stagger, and realize water blockoff.Owing to the effect of two seals circle is arranged between the two ends of interior pipe liquid pass hole 117, can effectively guarantee the enforcement of pressure measurement and water blockoff.When the needs deblocking, repeat above-mentioned steps and just can realize de-plugging.
Direct-reading delamination pressure gauge of the present invention as shown in Figure 5, comprises the Malong pipe nipple 21, magnetic orientation the spread of the rumours pipe nipple 22, electronic orientation spool 23, strata pressure pressure measurement pipe nipple 24, electronic packoff nipple 25 and the full well pressure pressure measurement pipe nipple 26 that are connected with cable 27.
Measuring cell of the present invention in use, discharging cable 27 on ground hangs in measuring cell in the delaminating pressure testing seating nipple 17 of down-hole, wherein a Malong pipe nipple 21, magnetic orientation the spread of the rumours pipe nipple 22 and strata pressure pressure measurement pipe nipple 24, full well pressure pressure measurement pipe nipple 26 adopt prior art, no longer describe in detail herein.Innovation part of the present invention is: the locating detent 38 on the electronic orientation spool 23 of measuring cell and the inwall of leather cup on the electronic packoff nipple 25 7,9 and delaminating pressure testing seating nipple 17 can carry out controlled location and be sealed and matched, thereby can stop at different well depths place and sealing, realize zonal testing the strata pressure of different depth.The barrel of delaminating pressure testing seating nipple 17 is provided with the stratum fluid hole 29 on corresponding different depth stratum, this stratum fluid hole 29 can with pressure tap 15 conductings on electronic packoff nipple 25 outer tube walls of measuring cell, this stratum fluid hole 29 is the pressure measurement liquid pass hole 116 in the above-mentioned delaminating pressure testing seating nipple, the fluid through-hole excessively that constitutes when interior pipe liquid pass hole 117 communicates, the structure of delaminating pressure testing seating nipple is not limited to the structure in the foregoing description, also pressure measurement liquid pass hole 116, interior pipe liquid pass hole 117 can be made a through hole.
As Fig. 6, shown in Figure 7, electronic packoff nipple of the present invention, wherein the introducing of strata pressure pressure measurement pipe nipple 24, pressure nozzle 11 and delaminating pressure testing seating nipple 17 is operating principles of electronic packoff nipple of the present invention for convenience of explanation.Electronic packoff nipple of the present invention comprises cylindrical outer casing 14, also comprises motor 1, shaft coupling 2, output shaft 3, power transmission shaft 4, dextrorotation transmission nut 5, sliding sleeve 6,16, leather cup 7,9, drive screw 8, left-handed transmission nut 10, transmission screw 12.Lower end in the cylindrical outer casing 14 is provided with motor 1, the upper end is connected with strata pressure pressure measurement pipe nipple 24, the pressure tap 15 that strata pressure pressure measurement pipe nipple 24 is offered by the pressure nozzle 11 and the middle part of cylindrical outer casing 14 is communicated with, motor 1 is in transmission connection with drive screw 8 by shaft coupling 2, output shaft 3, power transmission shaft 4, on the barrel of cylindrical outer casing 14 in the upper and lower of pressure tap 15 respectively slip cap two sliding sleeves 16,6 are housed, near the corresponding fixed cover of an end of pressure taps 15 leather cup 7,9 is housed in two sliding sleeves 16,6 on the barrel of cylindrical outer casing 14.The opposite end of leather cup 7,9 and sliding sleeve 6,16 is for being respectively the rim of a bowl structure and tapered sleeve structure, leave between leather cup 7,9 and the cylindrical outer casing 14 and can insert to strut the gap on leather cup 7,9 lip limits for sliding sleeve 6,16, the sliding sleeve 6,16 that the lip limit of the bowl mouth end of leather cup 7,9 can be inserted into pushes internally and outwards routs up, thus the gap between radial seal cylindrical outer casing 14 and the delaminating pressure testing seating nipple 17.The transmission screw 12 of sliding sleeve 6 by radially is connected with dextrorotation transmission nut 5, and dextrorotation transmission nut 5 spinnings are on drive screw 8, and the left-handed transmission nut 10 on drive screw 8 is connected by transmission screw and spinning for 6 of sliding sleeves.
The leather cup of electronic packoff nipple is a kind of sealing shroud in the foregoing description, can certainly select other the sealing shroud with elasticity enlarging; It is how right that leather cup in the foregoing description, sliding sleeve also can be provided with on the measuring cell urceolus, and form a plurality of seal sections on the measuring cell urceolus; Sliding sleeve driving mechanism in the foregoing description is made of motor and screw-nut body, is realized driving by the clutch end connection drive sliding sleeve of screw-nut body, and its transmission fit system is the connection transmission.Can certainly replace with other transmission mechanisms by driven by motor, for example gear mechanism, worm-and-wheel gear, linkage, belt mechanism etc. are connected transmission or Contact Transmission with sliding sleeve.
As shown in Figure 8, electronic orientation spool of the present invention comprises cylindrical case 39, motor 31, shaft coupling 32, output shaft 33, drive screw 34, transmission nut 35, spring 36, turning cylinder 37 and locating detent 38.Motor 31 is in transmission connection with drive screw 34 by shaft coupling 32 and output shaft 33, by screw fit transmission nut 35 is arranged on the drive screw 34, the top of transmission nut 35 has pushing tow termination 30, transmission nut 35 only can be in axial lifting moving when described transmission nut 35 was implemented in drive screw 34 and rotates by only revolving position limiting structure, and only revolving position limiting structure can cooperate with key, the groove of cylindrical case 39 inwalls or non-circular shaft, hole cooperation realization by transmission nut 35.The pawl body of two locating detents 38 rotates by turning cylinder 37 and is assemblied in the cylindrical case 39, is top-loaded with spring 36 between the relative inner of the pawl end of two locating detents 38, and spring 36 passes through from the middle part of transmission nut 35.The axial lifting moving stroke corresponding matching of the pushing tow termination 30 of inboard position of the tail end of two locating detents 38 and described transmission nut 35: but pushing tow locating detent 38 tail ends reclaim the pawl end of locating detent when rise in pushing tow termination 30, pushing tow locating detent 38 tail ends no longer when pushing tow termination 30 descends, locating detent 38 is opened by spring force.
The locating detent driving mechanism of electronic orientation spool is made of motor 31 and screw-nut body in the foregoing description, realizes driving the mode Contact Transmission that its transmission cooperates by the clutch end pushing tow locating detent 38 of screw-nut body.Can certainly replace with other transmission mechanisms by driven by motor, for example gear mechanism, worm-and-wheel gear, linkage, belt mechanism etc. are connected transmission or Contact Transmission with locating detent 38.
The present invention is in when work, a Malong pipe nipple 21 stube cables and magnetic orientation the spread of the rumours pipe nipple 22, and cable connector carried out insulated enclosure, realize the positiver sealing of communication signal; The function of magnetic orientation the spread of the rumours pipe nipple 22 is to gather the magnetic orientation depth signal, and downhole testing data coding transmission to Ground Control instrument port, is received the Ground Control instrument and transmits the instruction of getting off, and control corresponding pipe nipple action; The function of electronic orientation spool 23 is to accept the Ground Control instruction that magnetic orientation the spread of the rumours pipe nipple 22 transmits, and strutting and drawing in of control locating detent realizes the accurate location with delaminating pressure testing seating nipple 17 locating slots; The function of strata pressure pressure measurement pipe nipple 24 and full well pressure pressure measurement pipe nipple 26 is to gather and handle pressure, the temperature signal of stratum and full well; The function of electronic packoff nipple 25 is to accept the Ground Control instruction that magnetic orientation the spread of the rumours pipe nipple 22 transmits, and strutting and drawing in of control leather cup realizes the sealing with delaminating pressure testing seating nipple 17 endoporus.
After electronic orientation spool 23 received the Ground Control signal, the axle of motor 31 began to rotate, and by shaft coupling 32 and output shaft 33 rotation is delivered on the drive screw 34.Drive screw 34 is processed with right-handed thread.When drive screw 34 when counterclockwise (overlooking) rotates, drive transmission nut 35 and upwards do rectilinear motion, promote locating detent 38 and inwardly rotate, draw in the diameter range of its shell, make measuring cell can be in laminated distributor under well pressure measurement seating nipple 17 free lifting; When arriving at, measuring cell needs the place, stop place, electronic orientation spool 23 receives the Ground Control signal, drive screw 34 clockwise directions (overlooking) rotate, drive transmission nut 35 and do rectilinear motion downwards, under spring 36 elastic force effects, locating detent 38 outwards struts maximum, can snap in after locating detent 38 struts on laminated distributor under well pressure measurement seating nipple 17 inwalls in the default annular positioning groove, locating detent 38 and annular positioning groove mutually button spacing cooperate realize under the axial location of well tool and laminated distributor under well pressure measurement seating nipple 17.
After the electronic packoff nipple of measuring cell received the Ground Control signal, the axle of motor 1 began to rotate, and by shaft coupling 2, output shaft 3 and power transmission shaft 4 rotation is delivered on the drive screw 8.Drive screw 8 lower ends processing right-handed thread, upper end processing left hand thread.When drive screw 8 (overlooking) rotation counterclockwise, drive dextrorotation transmission nut 5 and left-handed transmission nut 10 and do rectilinear motion to the measuring cell middle part, drive sliding sleeve 6,16 by the transmission screw and also do rectilinear motion to the measuring cell middle part, thereby the rim of a bowl lip limit of extruding leather cup 7,9 is outwards routed up, form the interference sealing with the endoporus of delaminating pressure testing seating nipple 17, thereby realized the sealing of strata pressure.Strata pressure is incorporated on the strata pressure pressure measurement pipe nipple 24 by the pressure tap 15 of pressure nozzle 11, has realized the test of strata pressure.When motor 1 drives drive screw 8 clockwise directions (overlooking) rotation, drive dextrorotation transmission nut 5 and left-handed transmission nut 10 and do rectilinear motion to the measuring cell outer end, drive sliding sleeve 6,16 by the transmission screw and also do rectilinear motion outward, the rim of a bowl lip limit of leather cup 7,9 is under elastic reaction, draw in the maximum gauge scope of measuring cell, make measuring cell and delaminating pressure testing seating nipple 17 deblockings.
Claims (10)
1, a kind of delamination pressure testing method for oil well without stop production is characterized in that: this method may further comprise the steps:
(1) it is also fixing to be lowered to the delaminating pressure testing seating nipple that is connected and composed from beginning to end by more piece seating nipple unit in the mode of giving up in the sleeve of down-hole, after being lowered to, no longer takes out by the delaminating pressure testing seating nipple, between delaminating pressure testing seating nipple and the down-hole sleeve with the shutoff of a plurality of laminated distributor under well packer, each packer is arranged at the both sides up and down of each oil reservoir, and make the delaminating pressure testing seating nipple respectively to save the seating nipple unit corresponding with the position on each stratum respectively; Be provided with in the described seating nipple unit and hold the axially extending bore that connects mutually up and down that pressure tester passes through, the barrel of each seating nipple unit is provided with to feed from the outside presses the pressure measurement liquid pass hole radially that communicates with ground in the axially extending bore, also is provided with the axial bridge-type flow channels that does not communicate with the pressure measurement liquid pass hole in each seating nipple unit;
(2) decentralized wellhead from oil well is lowered to the pressure tester that comprises seal member and load cell, in the axially extending bore of the seating nipple unit of the tested stratum correspondence under the pressure tester in the delaminating pressure testing seating nipple, make then load cell in the pressure tester dock with pressure measurement liquid pass hole radially in the seating nipple unit, place, by the axially extending bore of seal member shutoff pressure measurement liquid pass hole both sides, load cell in the pressure tester measures oilwell parameter by the pressure measurement liquid pass hole, and the axial bridge-type flow channels in pressure measurement while seating nipple unit continues to pass through for the oil of other oil reservoir;
(3) test of pressure tester finishes, can continue with under the pressure tester in pairing seating nipple unit, another layer stratum, implement another target zone to the shutoff pressure measurement of seating nipple unit, perhaps salvage pressure tester and go out the pressure measurement seating nipple, take out through annular space, the decentralized wellhead of oil jacket.
2, pressure testing method according to claim 1 is characterized in that: the top of described delaminating pressure testing seating nipple has the horn mouth that upwards enlarges.
3, pressure testing method according to claim 1 and 2 is characterized in that: described pressure tester is pressure measurement blanking plug+pressure gauge.
4, pressure testing method according to claim 1, it is characterized in that: described pressure tester is the direct-reading delamination pressure gauge, this direct-reading delamination pressure gauge comprises and is used for the Malong pipe nipple that is connected with the cable of going into the well and the pressure measurement part of connection thereof, described pressure measurement partly comprises strata pressure pressure measurement pipe nipple, it is characterized in that: also be provided with controlled packoff nipple on the described measuring cell, controlled orientation spool and be used for control sealing, the control section of orientation spool action, described control section comprises the spread of the rumours pipe nipple that is used for the production wells number of deeply convinceing, wireless signal transceiver and location, seal control device, described controlled packoff nipple are provided with the pressure tap that communicates with the pressure nozzle of strata pressure pressure measurement pipe nipple.
5, pressure testing method according to claim 4, it is characterized in that: described packoff nipple comprises cylindrical outer casing, slip cap is located at the sliding sleeve on the cylindrical outer casing outer wall in pairs, be installed in the sliding sleeve driving mechanism in the cylindrical outer casing, fixed cover is loaded on the sealing shroud on the cylindrical outer casing outer wall in pairs, described sealing shroud has the elasticity enlarging of bowl-mouth shape, the elasticity enlarging of described sealing shroud and sliding sleeve are oppositely arranged also and leave between the cylindrical outer casing and can insert to strut the gap on its elasticity enlarging lip limit for sliding sleeve, two clutch ends that the direction of motion that described sliding sleeve driving mechanism has paired setting is opposite, cooperate with the corresponding transmission of two sliding sleeves of paired setting respectively, described pressure tap is arranged on the cylindrical outer casing of the packoff nipple between the paired sealing shroud.
6, pressure testing method according to claim 5, it is characterized in that: described sliding sleeve driving mechanism is made of the screw-nut body that motor reaches the clutch end lifting vertically that is connected with drive of motor, described screw-nut body comprises that turn-screw reaches and the transmission nut of the paired setting of its threaded engagement, the thread rotary orientation of two transmission nuts that are provided with is opposite in pairs, described turn-screw is connected with drive of motor by transmission connection piece, two transmission nuts of described paired setting respectively with the corresponding connection of two sliding sleeves of paired setting, offer the axial groove that interts and move vertically for the part that links to each other of transmission nut and sliding sleeve on the described cylindrical outer casing.
7, pressure testing method according to claim 6 is characterized in that: described sealing shroud is a leather cup, and described sliding sleeve is to insert the closing in tapered sleeve that cooperate with the elasticity enlarging of leather cup with the opposite end of leather cup.
8, according to any described pressure testing method in the claim 4～7, it is characterized in that: locating detent driving mechanism, pawl body that described controlled orientation spool comprises cylindrical case, be installed in the cylindrical case rotate the floating one or more locating detent of putting on the cylindrical case outer wall of the pawl end that is assemblied in the cylindrical case, and the clutch end of described locating detent driving mechanism cooperates with the power intake transmission of the wobbling action of locating detent.
9, pressure testing method according to claim 8, it is characterized in that: described locating detent driving mechanism is made of the screw-nut body of motor and motor-driven exportable axial power, described locating detent is provided with and can makes the open spring of locating detent, the clutch end of described screw-nut body can corresponding Contact Transmission with the locating detent tail end cooperate in its axial lifting travel, its matching relationship is: but pushing tow locating detent tail end reclaims the pawl end of locating detent when the clutch end of screw-nut body rises, pushing tow locating detent tail end no longer when the clutch end of screw-nut body descends, locating detent is opened by spring force; Described screw-nut body is to be made of the transmission nut by screw fit on drive screw that is connected with drive of motor and the drive screw, what described transmission nut was provided with restriction transmission nut rotation only revolves position limiting structure, and the top of transmission nut is provided with the pushing tow termination with locating detent tail end corresponding matching.
10, pressure testing method according to claim 9 is characterized in that: the described position limiting structure that only revolves is key, groove fit structure or non-circular shaft, a hole fit structure between transmission nut and cylindrical case; Described locating detent is provided with in pairs, and described spring is mounted between the relative inner of pawl end of two paired locating detents.
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| CN2008102305579A CN101403296B (en) | 2008-10-23 | 2008-10-23 | Delamination pressure testing method for oil well without stop production |
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| CN2008102305579A CN101403296B (en) | 2008-10-23 | 2008-10-23 | Delamination pressure testing method for oil well without stop production |
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