CN111997593B - Hydraulic control device of formation pressure measurement while drilling device - Google Patents
Hydraulic control device of formation pressure measurement while drilling device Download PDFInfo
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- CN111997593B CN111997593B CN202010937402.XA CN202010937402A CN111997593B CN 111997593 B CN111997593 B CN 111997593B CN 202010937402 A CN202010937402 A CN 202010937402A CN 111997593 B CN111997593 B CN 111997593B
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- way valve
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
The invention relates to the technical field of underground formation pressure detection, in particular to a hydraulic control device of a formation pressure measurement while drilling device, which comprises a motor, an oil tank, a hydraulic pump, a first two-position three-way valve, a second two-position three-way valve, a two-position two-way valve, a pressure measuring device, a suction device and a control module, wherein an output shaft of the motor is connected with a power input end of the hydraulic pump, a liquid inlet of the hydraulic pump is communicated with the oil tank, a liquid outlet of the hydraulic pump is communicated with a first interface of the first two-position three-way valve through a first pipeline, and the first pipeline is communicated with a first interface of the second two-position three-way valve through a second pipeline. The invention has reasonable and compact structure and convenient use, realizes the measurement actions such as pushing, seating, swabbing, unsealing, resetting and the like of the probe by arranging the pressure measuring device and the suction device and switching the power-on and power-off states of the first two-position three-way valve, the second two-position three-way valve and the two-position two-way valve, and has the characteristics of stability, high efficiency and accuracy.
Description
Technical Field
The invention relates to the technical field of underground formation pressure detection, in particular to a hydraulic control device of a formation pressure measurement while drilling device.
Background
Formation pressure is an important parameter in the drilling industry, and the formation pressure value is obtained by calculation of logging data after drilling by adopting conventional formation pressure value, so that the formation pressure cannot be obtained in real time.
Disclosure of Invention
The invention provides a hydraulic control device of a formation pressure measurement while drilling device, which overcomes the defects of the prior art and can effectively solve the problem that the existing downhole tool cannot acquire the formation pressure value in real time.
The technical scheme of the invention is realized by the following measures: the hydraulic control device of the formation pressure measurement while drilling device comprises a motor, an oil tank, a hydraulic pump, a first two-position three-way valve, a second two-position three-way valve, a two-position two-way valve, a pressure measuring device, a suction device and a control module, wherein an output shaft of the motor is connected with a power input end of the hydraulic pump, a liquid inlet of the hydraulic pump is communicated with the oil tank, a liquid outlet of the hydraulic pump is communicated with a first interface of the first two-position three-way valve through a first pipeline, the first pipeline is communicated with a first interface of the second two-position three-way valve through a second pipeline, a second interface of the second two-position three-way valve is communicated with the oil tank through a third pipeline, the third pipeline is communicated with a second interface of the first two-position three-way valve through a fourth pipeline, the third interface of the first two-position three-way valve and the third interface of the second two-position three-way valve are respectively communicated with the pressure measuring device capable of detecting formation pressure and annulus pressure, the first pipeline between the second pipeline and the liquid outlet of the hydraulic pump are communicated with the first interface of the two-position three-way valve through a fifth pipeline, the second interface of the two-position three-way valve is communicated with the suction device capable of sucking formation fluid through a sixth pipeline, and the sampling chamber is communicated with the sampling chamber through a seventh pipeline; the pressure measuring device and the suction device are connected with the control module, and the control module is respectively connected with the motor, the first two-position three-way valve, the second two-position three-way valve and the two-position two-way valve.
The following are further optimizations and/or improvements to the above-described inventive solution:
the suction device can comprise a suction nipple, an end cover, a mounting seat, a piston rod, a piston ring, a guide rod, a displacement sensor, a first plug, a second plug, a connector and a return spring, wherein the axis of the suction nipple is arranged in a left-right direction; the outer side of the middle part of the suction nipple is provided with a through hole which can be communicated with the second straight hole, the inner side of the outer end of the through hole is fixedly provided with a second plug, and the upper part of the left side of the suction nipple is provided with a hydraulic hole which can be communicated with the through hole; the left side of the suction nipple is provided with an end cover, the end cover corresponding to the position of the hydraulic hole is provided with a left-right through upper mounting hole, the upper mounting hole is communicated with a second connector of the two-position two-way valve through a sixth pipeline, the inner side of the right end of the upper mounting hole is provided with a connector of which the right end is positioned in the hydraulic hole, the end cover corresponding to the position of the first straight hole is provided with a left-right through lower mounting hole, the lower mounting hole is communicated with the oil tank through a seventh pipeline, a mounting seat is fixedly arranged in the lower mounting hole, the left center of the mounting seat is provided with a left-right through mounting hole, the left side of the mounting seat corresponding to the position of the outer side of the mounting hole is circumferentially provided with at least two left-right through circulating holes, the inner side of the mounting hole is fixedly provided with a guide rod of which the right end is positioned in the first moving hole, the guide rod is provided with a left-right through second moving hole, and the outer side of the left part of the guide rod corresponding to the position between the mounting seat and the piston ring is provided with a reset spring; the first moving hole is internally provided with a displacement sensor capable of detecting the position of the piston ring, the right end of the displacement sensor is fixedly arranged with the left end of the first plug, and the left end of the displacement sensor is positioned in the second moving hole.
The suction pipe nipple can also comprise an O-shaped sealing ring and a Gray sealing ring, wherein at least one O-shaped sealing ring is arranged between the end cover and the connector at a left-right interval, and at least one O-shaped sealing ring is arranged between the suction pipe nipple and the connector at a left-right interval; at least one Gray sealing ring is arranged at the left-right interval between the piston ring and the suction nipple, and at least one Gray sealing ring is arranged at the left-right interval between the sealing ring table and the suction nipple.
The pressure measuring device can comprise a pressure measuring nipple, a first oil cylinder, a second oil cylinder, a third oil cylinder, a probe assembly, a first pushing block, a second pushing block and a pressure sensor, wherein the pressure sensor is arranged in the pressure measuring nipple, the first oil cylinder, the second oil cylinder and the third oil cylinder are arranged in the pressure measuring nipple, a piston rod of the first oil cylinder can outwards extend, the probe assembly is arranged at the outer end of the piston rod of the first oil cylinder, the first pushing block is arranged at the outer end of the piston rod of the second oil cylinder, the second pushing block is arranged at the outer end of the piston rod of the third oil cylinder, and the extending directions of the piston rods of the second oil cylinder and the third oil cylinder are opposite to the extending directions of the piston rod of the first oil cylinder; the third interface of the first two-position three-way valve is communicated with the rod cavity of the first oil cylinder through a first retraction pipeline, the first retraction pipeline is communicated with the rod cavity of the second oil cylinder through a second retraction pipeline, the second retraction pipeline is communicated with the rod cavity of the third oil cylinder through a third retraction pipeline, the third interface of the second two-position three-way valve is communicated with the rodless cavity of the first oil cylinder through a first extension pipeline, the first extension pipeline is communicated with the rodless cavity of the second oil cylinder through a second extension pipeline, and the second extension pipeline is communicated with the rodless cavity of the third oil cylinder through a third extension pipeline.
The hydraulic pump further comprises a safety valve and an overflow valve, wherein the first pipeline between the fifth pipeline and the liquid outlet of the hydraulic pump is communicated with the oil tank through an eighth pipeline, and the eighth pipeline is respectively provided with the overflow valve and the safety valve.
The system can further comprise a vibration sensor and a differential pressure sensor, wherein the vibration sensor and the differential pressure sensor are respectively connected with the control module.
The invention has reasonable and compact structure and convenient use, and realizes the measurement actions such as probe pushing, seat sealing, swabbing, unsealing, resetting and the like by arranging the pressure measuring device and the suction device and switching the power-on and power-off states of the first two-position three-way valve, the second two-position three-way valve and the two-position two-way valve; the rodless cavities of the first oil cylinder, the second oil cylinder and the third oil cylinder are communicated, so that the probe assembly, the first pushing block and the second pushing block are all extended out of the pressure measuring nipple from inside to outside, and real-time measurement of formation pressure is realized; the rod cavities of the first oil cylinder, the second oil cylinder and the third oil cylinder are communicated, so that the probe assembly, the first pushing block and the second pushing block are all retracted from the pressure measuring nipple from outside to inside, and real-time measurement of annular pressure is realized; through setting up first pushing away and lean on the piece and pushing away the piece with the second, when the probe assembly from pressure measurement nipple joint from inside to outside and with the wall of a well contact measurement formation pressure, play the effect of supporting and righting, have stable, high-efficient and accurate characteristics.
Drawings
Fig. 1 is a hydraulic schematic of a preferred embodiment of the present invention.
Fig. 2 is a circuit block diagram of a preferred embodiment of the present invention.
Fig. 3 is a schematic view of the suction device of fig. 1 in front cross-section.
The codes in the drawings are respectively: 1 is a motor, 2 is an oil tank, 3 is a hydraulic pump, 4 is a first two-position three-way valve, 5 is a second two-position three-way valve, 6 is a two-position two-way valve, 7 is a control module, 8 is a first oil cylinder, 9 is a second oil cylinder, 10 is a third oil cylinder, 11 is a probe assembly, 12 is a first pushing block, 13 is a second pushing block, 14 is a safety valve, 15 is an overflow valve, 16 is a first pipeline, 17 is a second pipeline, 18 is a third pipeline, 19 is a fourth pipeline, 20 is a fifth pipeline, 21 is a suction nipple, 22 is an end cover, 23 is a mounting seat, 24 is a piston rod, 25 is a piston ring, 26 is a guide rod, 27 is a displacement sensor, 28 is a first plug, 29 is a second plug, 30 is a first straight hole, 31 is a second straight hole, 32 is a third straight hole, 33 is a sealing ring, 34 is a guide hole, 35 is a hydraulic hole, 36 is an upper mounting hole, 37 is a lower mounting hole, 38 is a first moving hole, 39 is a second moving hole, 40 is a sealing ring, 23 is a mounting seat, 24 is a reset spring, 45 is a second pipeline, 48 is a retraction, 45 is a third pipeline, 45 is a retraction pipeline, 48 is a extension pipeline, 45, and 50 is a retraction pipeline is a extension.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described below with reference to examples and figures:
as shown in fig. 1 and 2, the hydraulic control device of the formation pressure while drilling measuring device comprises a motor 1, an oil tank 2, a hydraulic pump 3, a first two-position three-way valve 4, a second two-position three-way valve 5, a two-position two-way valve 6, a pressure measuring device, a suction device and a control module 7, wherein an output shaft of the motor 1 is connected with a power input end of the hydraulic pump 3, a liquid inlet of the hydraulic pump 3 is communicated with the oil tank 2, a liquid outlet of the hydraulic pump 3 is communicated with a first interface a of the first two-position three-way valve 4 through a first pipeline 16, the first pipeline 16 is communicated with a first interface d of the second two-position three-way valve 5 through a second pipeline 17, a second interface e of the second two-position three-way valve 5 is communicated with the oil tank 2 through a third pipeline 18, the third pipeline 18 is communicated with a second interface b of the first two-position three-way valve 4 through a fourth pipeline 19, a third interface c of the first two-position three-way valve 4 and a third interface f of the second two-way valve 5 are respectively communicated with a device capable of detecting formation pressure and annulus pressure, a second pipeline 17 is communicated with a second interface 16 of the liquid outlet of the hydraulic pump 3 and a second two-position three-way valve 6 through a second pipeline 6 through a fifth pipeline 45, and a fourth pipeline 20 is communicated with a sampling chamber through a second two-position three-way valve 2 through a fifth pipeline 45; the pressure measuring device and the suction device are connected with a control module 7, and the control module 7 is respectively connected with the motor 1, the first two-position three-way valve 4, the second two-position three-way valve 5 and the two-position two-way valve 6. In the use process, the measuring actions such as pressure measurement of the pressure measuring device, pumping of the pumping device and the like are realized by arranging the pressure measuring device and the pumping device and switching the power-on and power-off states of the first two-position three-way valve 4, the second two-position three-way valve 5 and the two-position two-way valve 6. The control module 7 is a circuit board which can be formed by a chip with the model pic18f6723 according to the requirement, which is a known technology.
The hydraulic control device of the formation pressure measurement while drilling device can be further optimized or/and improved according to actual needs:
as shown in fig. 1, 2 and 3, the suction device comprises a suction nipple 21, an end cover 22, a mounting seat 23, a piston rod 24, a piston ring 25, a guide rod 26, a displacement sensor 27, a first plug 28, a second plug 29, a connector 40 and a return spring 42, wherein the axis of the suction nipple 21 is arranged in a left-right direction, a left-right through hydraulic cavity is arranged at the lower part of the left side of the suction nipple 21, the hydraulic cavity comprises a first straight hole 30, a second straight hole 31 and a third straight hole 32 which are sequentially communicated from left to right and have sequentially reduced inner diameters, the second straight hole 31 is internally provided with a piston rod 24 with the left end positioned in the first straight hole 30, the outer side of the left end of the piston rod 24 is fixedly provided with the piston ring 25, the piston rod 24 is provided with a left-right through first moving hole 38, the outer side of the right end of the piston rod 24 is provided with a sealing ring table 33, and the inner side of the right end of the piston rod 24 is fixedly provided with the first plug 28; the outer side of the middle part of the suction pup joint 21 is provided with a through hole 34 which can be communicated with the second straight hole 31, the inner side of the outer end of the through hole 34 is fixedly provided with a second plug 29, and the upper part of the left side of the suction pup joint 21 is provided with a hydraulic hole 35 which can be communicated with the through hole 34; the left side of the suction nipple 21 is provided with an end cover 22, the end cover 22 corresponding to the position of the hydraulic hole 35 is provided with an upper mounting hole 36 which is penetrated left and right, the upper mounting hole 36 is communicated with a second joint h of the two-position two-way valve 6 through a sixth pipeline 45, the inner side of the right end of the upper mounting hole 36 is provided with a connecting head 40 with the right end positioned in the hydraulic hole 35, the end cover 22 corresponding to the position of the first straight hole 30 is provided with a lower mounting hole 37 which is penetrated left and right, the lower mounting hole 37 is communicated with the oil tank 2 through a seventh pipeline, the lower mounting hole 37 is internally and fixedly provided with a mounting seat 23, the left side center of the mounting seat 23 is provided with a mounting hole which is penetrated left and right, the left side of the mounting seat 23 corresponding to the outer side of the mounting hole is circumferentially distributed with at least two circulating holes which are penetrated left and right, the inside of the mounting hole is fixedly provided with a guide rod 26 with the right end positioned in the first moving hole 38, the guide rod 26 is provided with a second moving hole 39 which is penetrated left and right, and the left side of the guide rod 26 is provided with a reset spring 42 corresponding to the left side of the guide rod 26 positioned between the mounting seat 23 and the piston ring 25; the first moving hole 38 is provided with a displacement sensor 27 capable of detecting the position of the piston ring 25, the right end of the displacement sensor 27 is fixedly arranged with the left end of the first plug 28, and the left end of the displacement sensor 27 is positioned in the second moving hole 39. In the use process, through the power-off of the two-position two-way valve 6, even if the two-position two-way valve 6 is opened, hydraulic oil sequentially passes through the sixth pipeline 45, the upper mounting hole 36, the hydraulic hole 35 and the through hole 34 and then enters the second straight hole 31, and pushes the piston ring 25 and the piston rod 24 to move leftwards, so that stratum fluid is sucked into the second straight hole 31 through the third straight hole 32; the displacement sensor 27 is arranged, so that after the piston ring 25 moves leftwards for a set distance, the two-position two-way valve 6 is closed for a period of time through the control module 7 and then is opened, and the pumping with the same volume is realized for a plurality of times; by arranging the return spring 42, the piston ring 25 and the piston rod 24 can move rightwards and return after the pumping for a plurality of times is conveniently completed; by providing the second straight hole 31 with a constant aperture, the volume of the stratum fluid sucked by the second straight hole 31 is constant after the piston rod 24 moves leftwards an equal distance. According to the requirement, the displacement sensor 27 is a known technology, and the model can be UM-375-2000 manufactured by the UNiVo company; in addition, the first two-position three-way valve 4 is in a normally open state, the second two-position three-way valve 5 is in a normally closed state, and the two-position two-way valve 6 is in a normally open state.
As shown in fig. 1, 2 and 3, the suction pipe nipple further comprises an O-ring 41 and a gray ring 44, at least one O-ring 41 is arranged between the end cover 22 and the connector 40 at a left-right interval, and at least one O-ring 41 is arranged between the suction pipe nipple 21 and the connector 40 at a left-right interval; at least one gray seal ring 44 is arranged at the left-right interval between the piston ring 25 and the suction nipple 21, and at least one gray seal ring 44 is arranged at the left-right interval between the seal ring table 33 and the suction nipple 21. In use, the sealing performance of the interior of the suction device is ensured by arranging the O-shaped sealing ring 41 and the Gray sealing ring 44.
As shown in fig. 1 and 2, the pressure measuring device comprises a pressure measuring nipple, a first oil cylinder 8, a second oil cylinder 9, a third oil cylinder 10, a probe assembly 11, a first pushing block 12, a second pushing block 13 and a pressure sensor, wherein the pressure measuring nipple is internally provided with the pressure sensor, a first oil cylinder 8, the second oil cylinder 9 and the third oil cylinder 10, the piston rod 24 of which can outwards extend, are arranged in the pressure measuring nipple, the probe assembly 11 is arranged at the outer end of the piston rod 24 of the first oil cylinder 8, the first pushing block 12 is arranged at the outer end of the piston rod 24 of the second oil cylinder 9, the second pushing block 13 is arranged at the outer end of the piston rod 24 of the third oil cylinder 10, and the extending direction of the piston rods 24 of the second oil cylinder 9 and the third oil cylinder 10 is opposite to the extending direction of the piston rod 24 of the first oil cylinder 8; the third interface c of the first two-position three-way valve 4 is communicated with the rod cavity of the first oil cylinder 8 through a first retraction pipeline 47, the first retraction pipeline 47 is communicated with the rod cavity of the second oil cylinder 9 through a second retraction pipeline 48, the second retraction pipeline 48 is communicated with the rod cavity of the third oil cylinder 10 through a third retraction pipeline 49, the third interface f of the second two-position three-way valve 5 is communicated with the rod-free cavity of the first oil cylinder 8 through a first extension pipeline 50, the first extension pipeline 50 is communicated with the rod-free cavity of the second oil cylinder 9 through a second extension pipeline 51, and the second extension pipeline 51 is communicated with the rod-free cavity of the third oil cylinder 10 through a third extension pipeline 52. In the use process, when rodless cavities of the first oil cylinder 8, the second oil cylinder 9 and the third oil cylinder 10 are communicated, the probe assembly 11, the first pushing block 12 and the second pushing block 13 extend outwards from the pressure measuring nipple from inside to outside and contact with a well wall to measure formation pressure; when the rod cavities of the first oil cylinder 8, the second oil cylinder 9 and the third oil cylinder 10 are communicated, the probe assembly 11, the first pushing block 12 and the second pushing block 13 are all retracted from the pressure measuring nipple to the inside for measuring annular pressure; by arranging the first pushing block 12 and the second pushing block 13, the probe assembly has the functions of supporting and righting when the probe assembly 11 extends out from the pressure measuring nipple from inside to outside and contacts with the well wall to measure the formation pressure.
As shown in fig. 1 and 2, the hydraulic pump further comprises a relief valve 14 and an overflow valve 15, wherein a first pipeline 16 between the fifth pipeline 20 and the liquid outlet of the hydraulic pump 3 is communicated with the oil tank 2 through an eighth pipeline 43, and the eighth pipeline 43 is respectively provided with the overflow valve 15 and the relief valve 14. The safety valve 14 and the overflow valve 15 are arranged to protect the hydraulic pump 3 during the use process, so that the invention can run safely, reliably and stably.
As shown in fig. 1 and 2, the device further comprises a vibration sensor and a differential pressure sensor, and the vibration sensor and the differential pressure sensor are respectively connected with the control module 7. In the use process, the vibration sensor can be arranged in the push-against drill collar, so that the invention is convenient to start, the liquid is prevented from being started in advance in the descending process, the liquid can be pumped into the well by adopting the well, after the pump is started and stopped for three times, the vibration sensor sends a vibration signal to the control module 7 according to the vibration frequency and the three times of vibration, and the control module 7 controls the motor 1 to start; by providing a differential pressure sensor, it can be installed on the first pipeline 16, the pressure at the outlet of the hydraulic pump 3 is measured, and the rotation speed of the motor 1 is controlled by the control module 7 to change the pressure, thereby protecting the hydraulic pump 3.
The technical characteristics form the optimal embodiment of the invention, have stronger adaptability and optimal implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
The specific use process of the invention is as follows:
(1) Normal drilling: the displacement sensor 27, the differential pressure sensor, the motor 1, the first two-position three-way valve 4, the second two-position three-way valve 5 and the two-position two-way valve 6 are in a power-off state, and the pressure sensor is in a normally-on state, wherein the first two-position three-way valve 4 is in a normally-on state, the second two-position three-way valve 5 is in a long-closed state, and the two-position two-way valve 6 is in a normally-on state;
(2) Downloading a sequence;
(3) Closing the oil way of the suction device: the two-position two-way valve 6 is electrified, so that the two-position two-way valve 6 is closed;
(4) Switching a high-pressure oil path of the pressure measuring device: the first two-position three-way valve 4 and the second two-position three-way valve 5 are electrified, so that the first two-position three-way valve 4 is closed, and the second two-position three-way valve 5 is opened;
(5) Pump oil high pressure: the differential pressure sensor and the motor 1 are electrified, and at the moment, the probe assembly 11, the first pushing block 12 and the second pushing block 13 extend outwards from the pressure measuring nipple and contact with the well wall to measure the stratum pressure;
(6) First pumping: the displacement sensor 27 is electrified to cut off the two-position two-way valve 6, so that the two-position two-way valve 6 is opened, and after the piston ring 25 moves leftwards for a set distance, the two-position two-way valve 6 is electrified to close the two-position two-way valve 6;
(7) And (5) swabbing for the second time: the two-position two-way valve 6 is powered off, so that the two-position two-way valve 6 is opened, and after the piston ring 25 moves leftwards for a set distance, the two-position two-way valve 6 is powered on, so that the two-position two-way valve 6 is closed;
(8) Third pumping: the two-position two-way valve 6 is powered off, so that the two-position two-way valve 6 is opened, and after the piston ring 25 moves leftwards for a set distance, the two-position two-way valve 6 is powered on, so that the two-position two-way valve 6 is closed;
(9) Retracting the probe: the displacement sensor 27 is closed, the first two-position three-way valve 4 and the second two-position three-way valve 5 are powered off, so that the first two-position three-way valve 4 is opened, the second two-position three-way valve 5 is closed, and at the moment, the probe assembly 11, the first pushing block 12 and the second pushing block 13 all retract from the outside of the pressure measuring nipple to the inside to measure annular pressure;
(10) The motor 1 stops rotating: the differential pressure sensor and the motor 1 are powered off;
(11) Resetting the suction device: the piston ring 25 returns to the original position under the action of the return spring 42;
(12) And uploading data.
Claims (8)
1. The hydraulic control device of the formation pressure measurement while drilling device is characterized by comprising a motor, an oil tank, a hydraulic pump, a first two-position three-way valve, a second two-position three-way valve, a two-position two-way valve, a pressure measuring device, a suction device and a control module, wherein an output shaft of the motor is connected with a power input end of the hydraulic pump, a liquid inlet of the hydraulic pump is communicated with the oil tank, a liquid outlet of the hydraulic pump is communicated with a first interface of the first two-position three-way valve through a first pipeline, the first pipeline is communicated with a first interface of the second two-position three-way valve through a second pipeline, a second interface of the second two-position three-way valve is communicated with the oil tank through a third pipeline, a third pipeline is communicated with a second interface of the first two-position three-way valve through a fourth pipeline, a third interface of the first two-position three-way valve and a third interface of the second two-position three-way valve are respectively communicated with the pressure measuring device capable of detecting formation pressure and annulus pressure, a first pipeline between the second pipeline and a liquid outlet of the hydraulic pump is communicated with the first interface of the two-position three-way valve through a fifth pipeline, a second interface of the two-position three-way valve is communicated with the suction device capable of sucking formation fluid through a seventh pipeline, and a sampling chamber is communicated with the oil tank through a sampling chamber; the pressure measuring device and the suction device are both connected with the control module, and the control module is respectively connected with the motor, the first two-position three-way valve, the second two-position three-way valve and the two-position two-way valve; the suction device comprises a suction nipple, an end cover, a mounting seat, a piston rod, a piston ring, a guide rod, a displacement sensor, a first plug, a second plug, a connector and a return spring, wherein the axis of the suction nipple is arranged in a left-right direction; the outer side of the middle part of the suction nipple is provided with a through hole which can be communicated with the second straight hole, the inner side of the outer end of the through hole is fixedly provided with a second plug, and the upper part of the left side of the suction nipple is provided with a hydraulic hole which can be communicated with the through hole; the left side of the suction nipple is provided with an end cover, the end cover corresponding to the position of the hydraulic hole is provided with a left-right through upper mounting hole, the upper mounting hole is communicated with a second connector of the two-position two-way valve through a sixth pipeline, the inner side of the right end of the upper mounting hole is provided with a connector of which the right end is positioned in the hydraulic hole, the end cover corresponding to the position of the first straight hole is provided with a left-right through lower mounting hole, the lower mounting hole is communicated with the oil tank through a seventh pipeline, a mounting seat is fixedly arranged in the lower mounting hole, the left center of the mounting seat is provided with a left-right through mounting hole, the left side of the mounting seat corresponding to the position of the outer side of the mounting hole is circumferentially provided with at least two left-right through circulating holes, the inner side of the mounting hole is fixedly provided with a guide rod of which the right end is positioned in the first moving hole, the guide rod is provided with a left-right through second moving hole, and the outer side of the left part of the guide rod corresponding to the position between the mounting seat and the piston ring is provided with a reset spring; the first moving hole is internally provided with a displacement sensor capable of detecting the position of the piston ring, the right end of the displacement sensor is fixedly arranged with the left end of the first plug, and the left end of the displacement sensor is positioned in the second moving hole.
2. The hydraulic control device of the formation pressure measurement while drilling device according to claim 1, further comprising an O-ring and a gray ring, wherein at least one O-ring is arranged between the end cover and the connector at a left-right interval, and at least one O-ring is arranged between the suction nipple and the connector at a left-right interval; at least one Gray sealing ring is arranged at the left-right interval between the piston ring and the suction nipple, and at least one Gray sealing ring is arranged at the left-right interval between the sealing ring table and the suction nipple.
3. The hydraulic control device of the formation pressure measurement while drilling device according to claim 1 or 2, wherein the pressure measurement device comprises a pressure measurement nipple, a first oil cylinder, a second oil cylinder, a third oil cylinder, a probe assembly, a first pushing block, a second pushing block and a pressure sensor, the pressure measurement nipple is internally provided with the pressure sensor, a first oil cylinder, a second oil cylinder and a third oil cylinder, a piston rod of which can extend outwards are arranged in the pressure measurement nipple, the outer end of the piston rod of the first oil cylinder is provided with the probe assembly, the outer end of the piston rod of the second oil cylinder is provided with the first pushing block, the outer end of the piston rod of the third oil cylinder is provided with the second pushing block, and the extending directions of the piston rods of the second oil cylinder and the third oil cylinder are opposite to the extending directions of the piston rod of the first oil cylinder; the third interface of the first two-position three-way valve is communicated with the rod cavity of the first oil cylinder through a first retraction pipeline, the first retraction pipeline is communicated with the rod cavity of the second oil cylinder through a second retraction pipeline, the second retraction pipeline is communicated with the rod cavity of the third oil cylinder through a third retraction pipeline, the third interface of the second two-position three-way valve is communicated with the rodless cavity of the first oil cylinder through a first extension pipeline, the first extension pipeline is communicated with the rodless cavity of the second oil cylinder through a second extension pipeline, and the second extension pipeline is communicated with the rodless cavity of the third oil cylinder through a third extension pipeline.
4. The hydraulic control device of the formation pressure while drilling measuring device according to claim 1 or 2, further comprising a relief valve and an overflow valve, wherein the first line between the fifth line and the outlet of the hydraulic pump is communicated with the oil tank via an eighth line, and the eighth line is provided with the overflow valve and the relief valve, respectively.
5. The hydraulic control device of the formation pressure while drilling measuring device according to claim 3, further comprising a relief valve and an overflow valve, wherein the first line between the fifth line and the outlet of the hydraulic pump is communicated with the oil tank via an eighth line, and the eighth line is provided with the overflow valve and the relief valve, respectively.
6. The hydraulic control device of the formation while drilling pressure measurement device according to claim 1, 2 or 5, further comprising a vibration sensor and a differential pressure sensor, wherein the vibration sensor and the differential pressure sensor are respectively connected with the control module.
7. A hydraulic control device for a formation pressure while drilling measurement device according to claim 3, further comprising a vibration sensor and a differential pressure sensor, each of which is connected to the control module.
8. The hydraulic control device of the formation while drilling pressure measurement device of claim 4, further comprising a vibration sensor and a differential pressure sensor, each coupled to the control module.
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