CN102080514A - Mechanical parameter measuring device of underground compression type packer and using method thereof - Google Patents
Mechanical parameter measuring device of underground compression type packer and using method thereof Download PDFInfo
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- CN102080514A CN102080514A CN2010105987990A CN201010598799A CN102080514A CN 102080514 A CN102080514 A CN 102080514A CN 2010105987990 A CN2010105987990 A CN 2010105987990A CN 201010598799 A CN201010598799 A CN 201010598799A CN 102080514 A CN102080514 A CN 102080514A
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Abstract
The invention relates to the technical field of a tool and method for mechanical parameter measuring of an underground packer rubber system for petroleum exploitation, in particular to a mechanical parameter measuring device of an underground compression type packer and a using method thereof. The mechanical parameter measuring device comprises a drivepipe, an upper head, a lower head, a packer, a radial stress sensor and an axial stress sensor; the packer with a seal element assembly is installed in the inner cavity of the drivepipe; and the exterior of the drivepipe is provided with the radial stress sensor, and the packer is provided with the axial stress sensor. The mechanical parameter measuring device provided by the invention has the advantages of reasonability and compactness, is convenient to use; and by utilizing the method provided by the invention, the parameters carried by each rubber, such as axial load, friction, compression deformation force and the contact pressure to the inner wall of the drivepipe can be measured effectively and accurately in real time in the operation of the packer, no damage to the signal output thread of each sensor can be ensured, the test cost is lowered greatly, and a reliable basis for improving the design of the packer can be provided.
Description
Technical field
The present invention relates to instrument and method and technology field that oil exploitation is measured with the packing element system mechanics parameter of downhole packer, is a kind of packer down-hole compression packer mechanical parameter testing arrangement and using method thereof.
Background technology
In oil field development, packer is one of main downhole tool of implementing injection-production technology operations such as oil production by layer, seperated layer water injection, separate stratum fracfturing or acidifying, machinery card water blockoff, and the packing element system is the critical component that guarantees the reliable packing of packer.Packer is between oil pipe and sleeve pipe, and when axial load is born by the packing element system, packing element will produce large deformation, contacts and produce contact pressure with internal surface of sleeve pipe, and the annulus between sleeve pipe and oil pipe is cut off, and forms packing.The packing element system is made up of several packing elements, spacer ring and center bushing pipe a plurality of parts such as (oil pipes), and the packing effect of packing element system is the coefficient result of all parts in this system.
In the measurement and research of existing down-hole compression type packer tubling system operational parameters, mainly concentrate in the measurement research of packing element and internal surface of sleeve pipe contact pressure, and draw the rule of some packing elements and the distribution of sleeve pipe contact pressure.But, the distribution of packing element and internal surface of sleeve pipe contact pressure is and the structure of axial load, packing element system, the physical dimension of each part, even it is relevant with many factors such as the physics and chemistry of packing element material, mechanical performances, so promptly enable to measure exactly the regularity of distribution of packing element and sleeve pipe contact pressure, be difficult to also quantitatively determine that each mechanical parameter is to the packing role in the packing element system.Thereby, be optimized design to the packing element system, also must understand and measure the axial load of each packing element of packer and the Changing Pattern of decrement.
Summary of the invention
The invention provides a kind of packer down-hole compression packer mechanical parameter testing arrangement and using method thereof, overcome the deficiency of prior art, can effectively carry out the suffered axial load of each packing element of the packing element system of downhole packer, suffered frictional force, compress variation and the The real time measure of the mechanical parameter such as contact pressure of internal surface of sleeve pipe.
One of technical scheme of the present invention realizes by following measure: a kind of packer down-hole compression packer mechanical parameter testing arrangement comprises sleeve pipe, upper cover, low head, packer, radial stresses sensor and axial stress sensor; The upper end of sleeve pipe is installed with upper cover, and the lower end of sleeve pipe is installed with low head, and the upper cover hole that is communicated with cannula cavity is arranged on the upper cover, and the low head hole that is communicated with cannula cavity is arranged on the low head; The packer that has seal assembly is installed in the inner chamber of sleeve pipe, the top of packer is sleeved in the upper cover hole and can moves up and down, the bottom of packer is sleeved in the low head hole and can moves up and down, and the rubber-like seal assembly can moving down that extruding highly reduces and external diameter increases and can restore to the original state because of moving on the packer because of packer; Jacket exterior is equipped with and is no less than one the radial stresses sensor that can detect the suffered seal assembly radial thrust of sleeve pipe, is equipped with on the packer to be no less than one the axial stress sensor that can detect the suffered axial compression of seal assembly.
Be further optimization and/or improvements below to the foregoing invention technical scheme:
Above-mentioned packer can comprise stay pipe, reducer union, packing element bushing pipe, core barrel connector, central tube, go up packing element bearing, lower rubber cylinder bearing and lining; The top of stay pipe is sleeved in the upper cover hole and can moves up and down, the lower end of stay pipe and the upper end of reducer union are fixed together, the upper end of the lower end of reducer union and packing element bushing pipe is fixed together, the upper end of the lower end of packing element bushing pipe and core barrel connector is fixed together, the lower end of core barrel connector and the upper end of central tube are fixed together, and the bottom of central tube is sleeved in the low head hole and can moves up and down; The outside of packing element bushing pipe is set with packing element bearing, seal assembly and lower rubber cylinder bearing from top to bottom successively, the upper end of last packing element bearing holds out against on the lower end of reducer union, the upper end of seal assembly holds out against on the lower end of last packing element bearing, the upper end of lower rubber cylinder bearing holds out against on the lower end of seal assembly and can move up and down because of seal assembly axial compression or reinstatement, and the outside of last packing element bearing and lower rubber cylinder bearing is fixed with the axial stress sensor respectively; In the cannula cavity between the lower end of lower rubber cylinder bearing and the upper end of low head lining is arranged, the bottom of packing element bushing pipe and core barrel connector are positioned at the inner chamber of lining and can move up and down.
The displacement detector of the axial crushing deformation amount that can detect seal assembly can be installed on the above-mentioned packer, displacement detector can comprise rectangular shaft, sensor upper bracket, sensor lower carriage, and the displacement transducer iron core and the displacement transducer coil that are no less than one group; The lumen centers of packing element bushing pipe has rectangular shaft, shaft through-hole and the axle cover is installed is had the inclination at the center of reducer union, there is the axle sleeve rectangular opening at the middle part of axle cover, the top of rectangular shaft is sleeved in the axle cover by the axle sleeve rectangular opening and can moves up and down, and the lower end of rectangular shaft is fixedly connected on the upper end of core barrel connector; Be installed with sensor upper bracket and sensor lower carriage by attachment screw respectively in the inner chamber of last packing element bearing and lower rubber cylinder bearing, the center of sensor upper bracket and sensor lower carriage has rectangular through-hole respectively, and the middle part of rectangular shaft is sleeved in the rectangular through-hole of sensor upper bracket and sensor lower carriage and can moves up and down; There is axial bushing pipe slotted hole on the right side of packing element bushing pipe and is communicated with the inner chamber and outside of packing element bushing pipe, the outside right side of sensor upper bracket and sensor lower carriage has fixing threaded hole respectively, the outer end of attachment screw is fixed on packing element bearing and the lower rubber cylinder bearing, and the inner of attachment screw is passed on the fixing threaded hole that the bushing pipe slotted hole is fixed on packing element bearing and lower rubber cylinder bearing; The connection packing element bushing pipe inner chamber that is no less than one and the joint through hole of central tube inner chamber are arranged on the core barrel connector, the lower end of sensor upper bracket is fixed with the displacement transducer iron core, be fixed with the displacement transducer coil on the sensor lower carriage, the bottom of displacement transducer iron core is sleeved in the displacement transducer coil and can moves up and down, and the signal output lead of displacement transducer coil enters the central tube inner chamber by the joint through hole and extend out to the outside, lower end of central tube.
Above-mentioned seal assembly can comprise first packing element, first spacer ring, second packing element, second spacer ring and the 3rd packing element; The outside of first spacer ring and second spacer ring is fixed with the axial stress sensor respectively, the frustum cavity is arranged respectively at the top and the bottom of the top of the bottom of last packing element bearing, lower rubber cylinder bearing and first spacer ring and second spacer ring, the top of first packing element, second packing element and the 3rd packing element is set in the frustum cavity on packing element bearing, first spacer ring and the second spacer ring top, and the bottom of first packing element, second packing element and the 3rd packing element is set in the frustum cavity on first spacer ring, second spacer ring and lower rubber cylinder bearing top; The position of corresponding first spacer ring and second spacer ring has the first spacer ring support and the second spacer ring support respectively in the inner chamber of packing element bushing pipe, the center of the first spacer ring support and the second spacer ring support has rectangular through-hole respectively, the middle part of rectangular shaft is sleeved in the rectangular through-hole of the first spacer ring support and the second spacer ring support and can moves up and down, the outside right side of the first spacer ring support and the second spacer ring support has fixing threaded hole respectively, and the first spacer ring support and the second spacer ring support are fixedly mounted on first spacer ring and second spacer ring by attachment screw and the fixing threaded hole that passes the bushing pipe slotted hole respectively; There is seat of honour iron core fixing hole at the rear portion of sensor upper bracket and is installed with the displacement transducer iron core that stretches out downwards, and there is the first coil stationary hole position of the corresponding seat of honour, the rear portion of first spacer ring support iron core fixing hole and is installed with the displacement transducer coil that protrudes upward; There is the first iron core fixing hole front portion of the first spacer ring support and is installed with the displacement transducer iron core that stretches out downwards, and there is the second coil stationary hole position of the anterior corresponding first iron core fixing hole of the second spacer ring support and is installed with the displacement transducer coil that protrudes upward; There is the second iron core fixing hole at the rear portion of the second spacer ring support and is installed with the displacement transducer iron core that stretches out downwards, and there is following coil stationary hole the position of the corresponding second iron core fixing hole in the rear portion of sensor lower carriage and is installed with the displacement transducer coil that protrudes upward; The lower end of above-mentioned each displacement transducer iron core is sleeved in the adjacent displacement transducer coil in below and can moves up and down.
Above-mentioned radial stresses sensor can comprise the radial load foil gauge, and the radial load foil gauge is equally spaced along straight line and is fixed on the outside right side of sleeve pipe.
Above-mentioned axial stress sensor can comprise the axial force foil gauge; On the front and rear in last packing element bearing, first spacer ring, second spacer ring and the lower rubber cylinder bearing outside bottom surface being arranged respectively is the sensor pit on plane, and the axial force foil gauge is fixed on the bottom surface of sensor pit.
Can there be the radial lead hole on above-mentioned right side of going up packing element bearing, first spacer ring, second spacer ring and lower rubber cylinder bearing respectively, the outside of last packing element bearing, first spacer ring, second spacer ring and lower rubber cylinder bearing can have the lead lead-out groove that is connected radial lead hole and sensor pit respectively, and the signal output lead of axial force foil gauge enters the central tube inner chamber by lead lead-out groove, radial lead hole, bushing pipe slotted hole and joint through hole successively and extend out to the outside, lower end of central tube.
Above-mentioned right side of going up packing element bearing, first spacer ring, second spacer ring and lower rubber cylinder bearing can have screw that pit is installed respectively, the radial lead hole is positioned at the bottom, bottom surface that screw is installed pit, the middle part, bottom surface that screw is installed pit has screw mounting hole, the outer end of attachment screw to be fixedly mounted in the screw mounting hole of packing element bearing, first spacer ring, second spacer ring or lower rubber cylinder bearing.
Two of technical scheme of the present invention realizes by following measure: the using method of a kind of packer down-hole compression packer mechanical parameter testing arrangement: at first, stay pipe is applied downward active force, by packer cannula cavity is intercepted; Then, Real-time and Dynamic is measured the strain value of going up the axial stress sensor on packing element bearing and the lower rubber cylinder bearing, thereby calculate the axial compressive force that acts on packing element bearing and the lower rubber cylinder bearing respectively, and poor according to the suffered active force of said two devices, try to achieve the suffered frictional force of seal assembly; Simultaneously, Real-time and Dynamic is measured the variation of the induced electromotive force of displacement sensor coil, and the relative displacement that calculates displacement transducer iron core and displacement transducer coil is the decrement of seal assembly; Simultaneously, measure the radial strain value of sleeve pipe, draw the corresponding relation between the strain of suffered contact pressure of internal surface of sleeve pipe and outside of sleeve by radial stresses sensor Real-time and Dynamic.
Three of technical scheme of the present invention realizes by following measure: the using method of a kind of packer down-hole compression packer mechanical parameter testing arrangement: at first, stay pipe is applied downward active force, make first packing element, second packing element and the 3rd packing element stress deformation and cannula cavity is intercepted; Then, Real-time and Dynamic is measured the strain value of going up each axial force foil gauge on packing element bearing, first spacer ring, second spacer ring and the lower rubber cylinder bearing, thereby calculate the axial compressive force that acts on packing element bearing, first spacer ring, second spacer ring and the lower rubber cylinder bearing respectively, and poor according to above-mentioned adjacent the two suffered active force, try to achieve first packing element, second packing element and the suffered frictional force of the 3rd packing element; Simultaneously, Real-time and Dynamic is measured the variation of the induced electromotive force of each displacement transducer coil, calculating the relative displacement of respectively organizing displacement transducer iron core and displacement transducer coil is the decrement of each packing element, the decrement summation of each packing element can be obtained the total compression amount of seal assembly; Simultaneously, Real-time and Dynamic is measured the strain value of each radial load foil gauge, draws the corresponding relation between the strain of the fixing radial load foil gauge of suffered contact pressure of internal surface of sleeve pipe and outside of sleeve; At last, determine the accurate position of each packing element compression back in sleeve pipe, and according to the strain value of sleeve pipe, can calculate herein packing element the contact pressure of internal surface of sleeve pipe at the radial load foil gauge of this fixed-site according to the decrement of above-mentioned each packing element.
Reasonable and compact in structure of the present invention, easy to use, by using this method suffered axial load of each packing element in the The real time measure packer course of work, suffered frictional force, compress variation and to a plurality of parameters such as contact pressure of internal surface of sleeve pipe efficiently and accurately, and the signal output lead that can guarantee each sensor does not damage, greatly reduce the experimental test cost, can provide reliable basis for the design improvement of packer.
Description of drawings
Accompanying drawing 1 is looked the sectional structure schematic diagram for the master of embodiments of the invention.
Accompanying drawing 2 is the axle geodesic structure schematic diagram of the displacement detector in the accompanying drawing 1.
Being encoded in the accompanying drawing: 1 is sleeve pipe, and 2 is upper cover, and 3 is low head, 4 is the upper cover hole, and 5 is the low head hole, and 6 is stay pipe, 7 are reducer union, and 8 is the packing element bushing pipe, and 9 is the core barrel connector, 10 is central tube, and 11 is last packing element bearing, and 12 is the lower rubber cylinder bearing, 13 is lining, and 14 is rectangular shaft, and 15 is the sensor upper bracket, 16 is the sensor lower carriage, 17 is the displacement transducer iron core, and 18 is the displacement transducer coil, and 19 is the axle through hole, 20 is the axle cover, 21 is the axle sleeve rectangular opening, and 22 is the bushing pipe slotted hole, and 23 is fixing threaded hole, 24 is attachment screw, 25 is first packing element, and 26 is first spacer ring, and 27 is second packing element, 28 is second spacer ring, 29 is the 3rd packing element, and 30 is the first spacer ring support, and 31 is the second spacer ring support, 32 is seat of honour iron core fixing hole, 33 is the first coil stationary hole, and 34 is the first iron core fixing hole, and 35 is the second coil stationary hole, 36 is the second iron core fixing hole, 37 are following coil stationary hole, and 38 is the radial load foil gauge, and 39 is the axial force foil gauge, 40 is the sensor pit, 41 is the radial lead hole, and 42 is the lead lead-out groove, and 43 is the joint through hole, 44 are screw installation pit, and 45 is screw mounting hole.
The specific embodiment
The present invention is not subjected to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and actual conditions.
Below in conjunction with embodiment and accompanying drawing the present invention is further described:
As shown in Figure 1, this packer down-hole compression packer mechanical parameter testing arrangement comprises sleeve pipe 1, upper cover 2, low head 3, packer, radial stresses sensor and axial stress sensor; The upper end of sleeve pipe 1 is installed with upper cover 2, and the lower end of sleeve pipe 1 is installed with low head 3, and the upper cover hole 4 that is communicated with sleeve pipe 1 inner chamber is arranged on the upper cover 2, and the low head hole 5 that is communicated with sleeve pipe 1 inner chamber is arranged on the low head 3; The packer that has seal assembly is installed in the inner chamber of sleeve pipe 1, the top of packer is sleeved in the upper cover hole 4 and can moves up and down, the bottom of packer is sleeved in the low head hole 5 and can moves up and down, and the rubber-like seal assembly can moving down that extruding highly reduces and external diameter increases and can restore to the original state because of moving on the packer because of packer; Sleeve pipe 1 outside is equipped with and is no less than one the radial stresses sensor that can detect sleeve pipe 1 suffered seal assembly radial thrust, is equipped with on the packer to be no less than one the axial stress sensor that can detect the suffered axial compression of seal assembly.Because seal assembly has elasticity, when packer moved down, seal assembly was because of crimp highly reduces, external diameter increases, thereby the inner chamber of sleeve pipe 1 is intercepted; When moving on the packer, seal assembly restores to the original state, thereby the inner chamber of sleeve pipe 1 is communicated with.The packing element and the sleeve pipe contact pressure regularity of distribution not only can be measured by radial stresses sensor and axial stress sensor, and seal assembly suffered axial load in the packing process can be dynamically measured.
Can according to actual needs the foregoing description be made further optimization and/or improvements:
As shown in Figure 1, packer comprises stay pipe 6, reducer union 7, packing element bushing pipe 8, core barrel connector 9, central tube 10, goes up packing element bearing 11, lower rubber cylinder bearing 12 and lining 13; The top of stay pipe 6 is sleeved in the upper cover hole 4 and can moves up and down, the upper end of the lower end of stay pipe 6 and reducer union 7 is fixed together, the upper end of the lower end of reducer union 7 and packing element bushing pipe 8 is fixed together, the upper end of the lower end of packing element bushing pipe 8 and core barrel connector 9 is fixed together, the upper end of the lower end of core barrel connector 9 and central tube 10 is fixed together, and the bottom of central tube 10 is sleeved in the low head hole 5 and can moves up and down; The outside of packing element bushing pipe 8 is set with packing element bearing 11, seal assembly and lower rubber cylinder bearing 12 from top to bottom successively, the upper end of last packing element bearing 11 holds out against on the lower end of reducer union 7, the upper end of seal assembly holds out against on the lower end of last packing element bearing 11, the upper end of lower rubber cylinder bearing 12 holds out against on the lower end of seal assembly and can move up and down because of seal assembly axial compression or reinstatement, and the outside of last packing element bearing 11 and lower rubber cylinder bearing 12 is fixed with the axial stress sensor respectively; In sleeve pipe 1 inner chamber between the upper end of the lower end of lower rubber cylinder bearing 12 and low head 3 lining 13 is arranged, the bottom of packing element bushing pipe 8 and core barrel connector 9 are positioned at the inner chamber of lining 13 and can move up and down.Can realize fixing to the seal assembly of packer by packer, and can dynamically measure seal assembly in the packing process suffered axial load with and to the active force of sleeve pipe 1.
Shown in accompanying drawing 1,2, the displacement detector of the axial crushing deformation amount that can detect seal assembly is installed on the packer, displacement detector comprises rectangular shaft 14, sensor upper bracket 15, sensor lower carriage 16, and the displacement transducer iron core 17 and displacement transducer coil 18 that are no less than one group; The lumen centers of packing element bushing pipe 8 has rectangular shaft 14, shaft through-hole 19 and axle cover 20 is installed is had the inclination at the center of reducer union 7, there is axle sleeve rectangular opening 21 at the middle part of axle cover 20, the top of rectangular shaft 14 is sleeved in the axle cover 20 by axle sleeve rectangular opening 21 and can moves up and down, and the lower end of rectangular shaft 14 is fixedly connected on the upper end of core barrel connector 9; Be installed with sensor upper bracket 15 and sensor lower carriage 16 by attachment screw 24 respectively in the inner chamber of last packing element bearing 11 and lower rubber cylinder bearing 12, the center of sensor upper bracket 15 and sensor lower carriage 16 has rectangular through-hole respectively, and the middle part of rectangular shaft 14 is sleeved in the rectangular through-hole of sensor upper bracket 15 and sensor lower carriage 16 and can moves up and down; There is axial bushing pipe slotted hole 22 on the right side of packing element bushing pipe 8 and is communicated with the inner chamber and outside of packing element bushing pipe 8, the outside right side of sensor upper bracket 15 and sensor lower carriage 16 has fixing threaded hole 23 respectively, the outer end of attachment screw 24 is fixed on packing element bearing 11 and the lower rubber cylinder bearing 12, and the inner of attachment screw 24 is passed on the fixing threaded hole 23 that bushing pipe slotted hole 22 is fixed on packing element bearing 11 and lower rubber cylinder bearing 12; Connection packing element bushing pipe 8 inner chambers that are no less than one and the joint through hole 43 of central tube 10 inner chambers are arranged on the core barrel connector 9, the lower end of sensor upper bracket 15 is fixed with displacement transducer iron core 17, be fixed with displacement transducer coil 18 on the sensor lower carriage 16, the bottom of displacement transducer iron core 17 is sleeved in the displacement transducer coil 18 and can moves up and down, and the signal output lead of displacement transducer coil 18 enters central tube 10 inner chambers by joint through hole 43 and extend out to the outside, lower end of central tube 10.Can dynamically measure the compress variation of seal assembly in the packing process by displacement detector.Joint through hole 43 can guarantee that the signal output lead of each displacement transducer does not damage, and the test data of signal output lead output can be by data collecting system collection, processing and output.
As shown in Figure 1, seal assembly comprises first packing element 25, first spacer ring 26, second packing element 27, second spacer ring 28 and the 3rd packing element 29; The outside of first spacer ring 26 and second spacer ring 28 is fixed with the axial stress sensor respectively, the bottom of last packing element bearing 11, the frustum cavity is arranged respectively at the top and the bottom of the top of lower rubber cylinder bearing 12 and first spacer ring 26 and second spacer ring 28, first packing element 25, the top of second packing element 27 and the 3rd packing element 29 is set in packing element bearing 11, in the frustum cavity on first spacer ring 26 and second spacer ring, 28 tops, first packing element 25, the bottom of second packing element 27 and the 3rd packing element 29 is set in first spacer ring 26, in the frustum cavity on second spacer ring 28 and lower rubber cylinder bearing 12 tops; The position of corresponding first spacer ring 26 and second spacer ring 28 has the first spacer ring support 30 and the second spacer ring support 31 respectively in the inner chamber of packing element bushing pipe 8, the center of the first spacer ring support 30 and the second spacer ring support 31 has rectangular through-hole respectively, the middle part of rectangular shaft 14 is sleeved in the rectangular through-hole of the first spacer ring support 30 and the second spacer ring support 31 and can moves up and down, the outside right side of the first spacer ring support 30 and the second spacer ring support 31 has fixing threaded hole 23, the first spacer ring supports 30 and the second spacer ring support 31 to be fixedly mounted on first spacer ring 26 and second spacer ring 28 by attachment screw 24 and the fixing threaded hole 23 that passes bushing pipe slotted hole 22 respectively respectively; There is the first coil stationary hole 33 position that there is seat of honour iron core fixing hole 32 at the rear portion of sensor upper bracket 15 and is installed with the corresponding seat of honour, the rear portion iron core fixing hole 32 of displacement transducer iron core 17, the first spacer ring supports 30 that stretch out downwards and is installed with the displacement transducer coil 18 that protrudes upward; There is the second coil stationary hole 35 position that there is the first iron core fixing hole 34 front portion of the first spacer ring support 30 and is installed with the anterior corresponding first iron core fixing hole 34 of displacement transducer iron core 17, the second spacer ring supports 31 that stretch out downwards and is installed with the displacement transducer coil 18 that protrudes upward; There is the second iron core fixing hole 36 at the rear portion of the second spacer ring support 31 and is installed with the displacement transducer iron core 17 that stretches out downwards, and there is following coil stationary hole 37 position of the corresponding second iron core fixing hole 36 in the rear portion of sensor lower carriage 16 and is installed with the displacement transducer coil 18 that protrudes upward; The lower end of above-mentioned each displacement transducer iron core 17 is sleeved in the adjacent displacement transducer coil in below 18 and can moves up and down.By the displacement transducer iron cores 17 and displacement transducer coil 18 that use many groups, each packing element that can measure seal assembly more exactly in real time separately compress variation in the packing process.
As shown in Figure 1, the radial stresses sensor comprises radial load foil gauge 38, and radial load foil gauge 38 is equally spaced along straight line and is fixed on the outside right side of sleeve pipe 1.Radial load foil gauge 38 can be measured the top-down distortion of sleeve pipe 1 outer wall, thereby detects the pressure of first packing element 25, second packing element 27 and 29 pairs of sleeve pipe 1 inwalls of the 3rd packing element, i.e. first packing element 25, second packing element 27 and the suffered load of the 3rd packing element 29.The radial stresses sensor also can be existing known other power sensor.The test data of the signal output lead output of radial load foil gauge 38 can be by data collecting system collection, processing and output.
As shown in Figure 2, the axial stress sensor comprises axial force foil gauge 39; On the front and rear in last packing element bearing 11, first spacer ring 26, second spacer ring 28 and lower rubber cylinder bearing 12 outsides bottom surface being arranged respectively is the sensor pit 40 on plane, and axial force foil gauge 39 is fixed on the bottom surface of sensor pit 40.Axial force foil gauge 39 can detect the suffered axial load of packing element bearing 11, first spacer ring 26, second spacer ring 28 and lower rubber cylinder bearing 12, and with the mechanical parameter such as frictional force of sleeve pipe 1 and packing element bushing pipe 8.The axial stress sensor also can be existing known other power sensor.
As shown in Figure 2, the right side of last packing element bearing 11, first spacer ring 26, second spacer ring 28 and lower rubber cylinder bearing 12 has radial lead hole 41 respectively, the outside of last packing element bearing 11, first spacer ring 26, second spacer ring 28 and lower rubber cylinder bearing 12 has the lead lead-out groove 42 that is connected radial lead hole 41 and sensor pit 40 respectively, and the signal output lead of axial force foil gauge 39 enters central tube 10 inner chambers by lead lead-out groove 42, radial lead hole 41, bushing pipe slotted hole 22 and joint through hole 43 successively and extend out to the outside, lower end of central tube 10.By radial lead hole 41 and lead lead-out groove 42, make packer in the process of setting, avoided the lead damage of the lead and the displacement detector of axial stress sensor.Joint through hole 43 can guarantee that the signal output lead of each axial force foil gauge 39 does not damage, and the test data of signal output lead output can be by data collecting system collection, processing and output.
As shown in Figure 2, the right side of last packing element bearing 11, first spacer ring 26, second spacer ring 28 and lower rubber cylinder bearing 12 has screw that pit 44 is installed respectively, radial lead hole 41 is positioned at the bottom, bottom surface that screw is installed pit 44, the middle part, bottom surface that screw is installed pit 44 has screw mounting hole 45, the outer end of attachment screw 24 to be fixedly mounted in the screw mounting hole 45 of packing element bearing 11, first spacer ring 26, second spacer ring 28 or lower rubber cylinder bearing 12.By screw pit 44 is installed and is protected the outer end of attachment screw 24 impaired, can also further protect the lead of axial stress sensor and the lead of displacement detector.
Above technical characterictic has constituted most preferred embodiment of the present invention, and it has stronger compliance and implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
Below be the using method of above-mentioned most preferred embodiment: at first, stay pipe 6 is applied downward active force, make first packing element 25, second packing element 27 and the 3rd packing element 29 stress deformations and sleeve pipe 1 inner chamber is intercepted; Then, Real-time and Dynamic is measured the strain value of going up each axial force foil gauge 39 on packing element bearing 11, first spacer ring 26, second spacer ring 28 and the lower rubber cylinder bearing 12, thereby calculate the axial compressive force that acts on packing element bearing 11, first spacer ring 26, second spacer ring 28 and the lower rubber cylinder bearing 12 respectively, and poor according to above-mentioned adjacent the two suffered active force, try to achieve first packing element 25, second packing element 27 and the suffered frictional force of the 3rd packing element 29; Simultaneously, Real-time and Dynamic is measured the variation of the induced electromotive force of each displacement transducer coil 18, calculating the relative displacement of respectively organizing displacement transducer iron core 17 and displacement transducer coil 18 is the decrement of each packing element, the decrement summation of each packing element can be obtained the total compression amount of seal assembly; Simultaneously, Real-time and Dynamic is measured the strain value of each radial load foil gauge 38, draws the corresponding relation between the strain of the fixing radial load foil gauge 38 in the suffered contact pressure of sleeve pipe 1 inwall and sleeve pipe 1 outside; At last, determine the accurate position of each packing element compression back in sleeve pipe 1, and according to the strain value of sleeve pipe 1, can calculate herein packing element the contact pressure of sleeve pipe 1 inwall at the radial load foil gauge 38 of this fixed-site according to the decrement of above-mentioned each packing element.
Claims (10)
1. a packer down-hole compression packer mechanical parameter testing arrangement is characterized in that comprising sleeve pipe, upper cover, low head, packer, radial stresses sensor and axial stress sensor; The upper end of sleeve pipe is installed with upper cover, and the lower end of sleeve pipe is installed with low head, and the upper cover hole that is communicated with cannula cavity is arranged on the upper cover, and the low head hole that is communicated with cannula cavity is arranged on the low head; The packer that has seal assembly is installed in the inner chamber of sleeve pipe, the top of packer is sleeved in the upper cover hole and can moves up and down, the bottom of packer is sleeved in the low head hole and can moves up and down, and the rubber-like seal assembly can moving down that extruding highly reduces and external diameter increases and can restore to the original state because of moving on the packer because of packer; Jacket exterior is equipped with and is no less than one the radial stresses sensor that can detect the suffered seal assembly radial thrust of sleeve pipe, is equipped with on the packer to be no less than one the axial stress sensor that can detect the suffered axial compression of seal assembly.
2. packer according to claim 1 down-hole compression packer mechanical parameter testing arrangement is characterized in that packer comprises stay pipe, reducer union, packing element bushing pipe, core barrel connector, central tube, goes up packing element bearing, lower rubber cylinder bearing and lining; The top of stay pipe is sleeved in the upper cover hole and can moves up and down, the lower end of stay pipe and the upper end of reducer union are fixed together, the upper end of the lower end of reducer union and packing element bushing pipe is fixed together, the upper end of the lower end of packing element bushing pipe and core barrel connector is fixed together, the lower end of core barrel connector and the upper end of central tube are fixed together, and the bottom of central tube is sleeved in the low head hole and can moves up and down; The outside of packing element bushing pipe is set with packing element bearing, seal assembly and lower rubber cylinder bearing from top to bottom successively, the upper end of last packing element bearing holds out against on the lower end of reducer union, the upper end of seal assembly holds out against on the lower end of last packing element bearing, the upper end of lower rubber cylinder bearing holds out against on the lower end of seal assembly and can move up and down because of seal assembly axial compression or reinstatement, and the outside of last packing element bearing and lower rubber cylinder bearing is fixed with the axial stress sensor respectively; In the cannula cavity between the lower end of lower rubber cylinder bearing and the upper end of low head lining is arranged, the bottom of packing element bushing pipe and core barrel connector are positioned at the inner chamber of lining and can move up and down.
3. packer according to claim 2 down-hole compression packer mechanical parameter testing arrangement, it is characterized in that being equipped with on the packer displacement detector of the axial crushing deformation amount that can detect seal assembly, displacement detector comprises rectangular shaft, sensor upper bracket, sensor lower carriage, and the displacement transducer iron core and the displacement transducer coil that are no less than one group; The lumen centers of packing element bushing pipe has rectangular shaft, shaft through-hole and the axle cover is installed is had the inclination at the center of reducer union, there is the axle sleeve rectangular opening at the middle part of axle cover, the top of rectangular shaft is sleeved in the axle cover by the axle sleeve rectangular opening and can moves up and down, and the lower end of rectangular shaft is fixedly connected on the upper end of core barrel connector; Be installed with sensor upper bracket and sensor lower carriage by attachment screw respectively in the inner chamber of last packing element bearing and lower rubber cylinder bearing, the center of sensor upper bracket and sensor lower carriage has rectangular through-hole respectively, and the middle part of rectangular shaft is sleeved in the rectangular through-hole of sensor upper bracket and sensor lower carriage and can moves up and down; There is axial bushing pipe slotted hole on the right side of packing element bushing pipe and is communicated with the inner chamber and outside of packing element bushing pipe, the outside right side of sensor upper bracket and sensor lower carriage has fixing threaded hole respectively, the outer end of attachment screw is fixed on packing element bearing and the lower rubber cylinder bearing, and the inner of attachment screw is passed on the fixing threaded hole that the bushing pipe slotted hole is fixed on packing element bearing and lower rubber cylinder bearing; The connection packing element bushing pipe inner chamber that is no less than one and the joint through hole of central tube inner chamber are arranged on the core barrel connector, the lower end of sensor upper bracket is fixed with the displacement transducer iron core, be fixed with the displacement transducer coil on the sensor lower carriage, the bottom of displacement transducer iron core is sleeved in the displacement transducer coil and can moves up and down, and the signal output lead of displacement transducer coil enters the central tube inner chamber by the joint through hole and extend out to the outside, lower end of central tube.
4. packer according to claim 3 down-hole compression packer mechanical parameter testing arrangement is characterized in that seal assembly comprises first packing element, first spacer ring, second packing element, second spacer ring and the 3rd packing element; The outside of first spacer ring and second spacer ring is fixed with the axial stress sensor respectively, the frustum cavity is arranged respectively at the top and the bottom of the top of the bottom of last packing element bearing, lower rubber cylinder bearing and first spacer ring and second spacer ring, the top of first packing element, second packing element and the 3rd packing element is set in the frustum cavity on packing element bearing, first spacer ring and the second spacer ring top, and the bottom of first packing element, second packing element and the 3rd packing element is set in the frustum cavity on first spacer ring, second spacer ring and lower rubber cylinder bearing top; The position of corresponding first spacer ring and second spacer ring has the first spacer ring support and the second spacer ring support respectively in the inner chamber of packing element bushing pipe, the center of the first spacer ring support and the second spacer ring support has rectangular through-hole respectively, the middle part of rectangular shaft is sleeved in the rectangular through-hole of the first spacer ring support and the second spacer ring support and can moves up and down, the outside right side of the first spacer ring support and the second spacer ring support has fixing threaded hole respectively, and the first spacer ring support and the second spacer ring support are fixedly mounted on first spacer ring and second spacer ring by attachment screw and the fixing threaded hole that passes the bushing pipe slotted hole respectively; There is seat of honour iron core fixing hole at the rear portion of sensor upper bracket and is installed with the displacement transducer iron core that stretches out downwards, and there is the first coil stationary hole position of the corresponding seat of honour, the rear portion of first spacer ring support iron core fixing hole and is installed with the displacement transducer coil that protrudes upward; There is the first iron core fixing hole front portion of the first spacer ring support and is installed with the displacement transducer iron core that stretches out downwards, and there is the second coil stationary hole position of the anterior corresponding first iron core fixing hole of the second spacer ring support and is installed with the displacement transducer coil that protrudes upward; There is the second iron core fixing hole at the rear portion of the second spacer ring support and is installed with the displacement transducer iron core that stretches out downwards, and there is following coil stationary hole the position of the corresponding second iron core fixing hole in the rear portion of sensor lower carriage and is installed with the displacement transducer coil that protrudes upward; The lower end of above-mentioned each displacement transducer iron core is sleeved in the adjacent displacement transducer coil in below and can moves up and down.
5. according to claim 1 or 2 or 3 or 4 described packer down-hole compression packer mechanical parameter testing arrangements, it is characterized in that the radial stresses sensor comprises the radial load foil gauge, the radial load foil gauge is equally spaced along straight line and is fixed on the outside right side of sleeve pipe.
6. packer according to claim 5 down-hole compression packer mechanical parameter testing arrangement is characterized in that the axial stress sensor comprises the axial force foil gauge; On the front and rear in last packing element bearing, first spacer ring, second spacer ring and the lower rubber cylinder bearing outside bottom surface being arranged respectively is the sensor pit on plane, and the axial force foil gauge is fixed on the bottom surface of sensor pit.
7. packer according to claim 6 down-hole compression packer mechanical parameter testing arrangement, the right side that it is characterized in that packing element bearing, first spacer ring, second spacer ring and lower rubber cylinder bearing has the radial lead hole respectively, the outside of last packing element bearing, first spacer ring, second spacer ring and lower rubber cylinder bearing has the lead lead-out groove that is connected radial lead hole and sensor pit respectively, and the signal output lead of axial force foil gauge enters the central tube inner chamber by lead lead-out groove, radial lead hole, bushing pipe slotted hole and joint through hole successively and extend out to the outside, lower end of central tube.
8. packer according to claim 7 down-hole compression packer mechanical parameter testing arrangement, the right side that it is characterized in that packing element bearing, first spacer ring, second spacer ring and lower rubber cylinder bearing has screw that pit is installed respectively, the radial lead hole is positioned at the bottom, bottom surface that screw is installed pit, the middle part, bottom surface that screw is installed pit has screw mounting hole, the outer end of attachment screw to be fixedly mounted in the screw mounting hole of packing element bearing, first spacer ring, second spacer ring or lower rubber cylinder bearing.
9. the using method of a packer according to claim 3 down-hole compression packer mechanical parameter testing arrangement is characterized in that carrying out as follows: at first, stay pipe is applied downward active force, by packer cannula cavity is intercepted; Then, Real-time and Dynamic is measured the strain value of going up the axial stress sensor on packing element bearing and the lower rubber cylinder bearing, thereby calculate the axial compressive force that acts on packing element bearing and the lower rubber cylinder bearing respectively, and poor according to the suffered active force of said two devices, try to achieve the suffered frictional force of seal assembly; Simultaneously, Real-time and Dynamic is measured the variation of the induced electromotive force of displacement sensor coil, and the relative displacement that calculates displacement transducer iron core and displacement transducer coil is the decrement of seal assembly; Simultaneously, measure the radial strain value of sleeve pipe, draw the corresponding relation between the strain of suffered contact pressure of internal surface of sleeve pipe and outside of sleeve by radial stresses sensor Real-time and Dynamic.
10. the using method of a packer according to claim 8 down-hole compression packer mechanical parameter testing arrangement, it is characterized in that carrying out as follows: at first, stay pipe is applied downward active force, make first packing element, second packing element and the 3rd packing element stress deformation and cannula cavity is intercepted; Then, Real-time and Dynamic is measured the strain value of going up each axial force foil gauge on packing element bearing, first spacer ring, second spacer ring and the lower rubber cylinder bearing, thereby calculate the axial compressive force that acts on packing element bearing, first spacer ring, second spacer ring and the lower rubber cylinder bearing respectively, and poor according to above-mentioned adjacent the two suffered active force, try to achieve first packing element, second packing element and the suffered frictional force of the 3rd packing element; Simultaneously, Real-time and Dynamic is measured the variation of the induced electromotive force of each displacement transducer coil, calculating the relative displacement of respectively organizing displacement transducer iron core and displacement transducer coil is the decrement of each packing element, the decrement summation of each packing element can be obtained the total compression amount of seal assembly; Simultaneously, Real-time and Dynamic is measured the strain value of each radial load foil gauge, draws the corresponding relation between the strain of the fixing radial load foil gauge of suffered contact pressure of internal surface of sleeve pipe and outside of sleeve; At last, determine the accurate position of each packing element compression back in sleeve pipe, and according to the strain value of sleeve pipe, can calculate herein packing element the contact pressure of internal surface of sleeve pipe at the radial load foil gauge of this fixed-site according to the decrement of above-mentioned each packing element.
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