CN110469481B - Electric direct-drive pumping and discharging device - Google Patents

Electric direct-drive pumping and discharging device Download PDF

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Publication number
CN110469481B
CN110469481B CN201910636298.8A CN201910636298A CN110469481B CN 110469481 B CN110469481 B CN 110469481B CN 201910636298 A CN201910636298 A CN 201910636298A CN 110469481 B CN110469481 B CN 110469481B
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China
Prior art keywords
track
rod
sliding rod
spiral pipe
sliding
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CN110469481A (en
Inventor
王晓冬
吴金云
方璐
陈军利
高世博
马颖
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China National Petroleum Corp
China Petroleum Logging Co Ltd
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China National Petroleum Corp
China Petroleum Logging Co Ltd
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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
    • E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
    • E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
    • E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Transmission Devices (AREA)

Abstract

The invention discloses an electric direct-drive pumping and exhausting device which comprises a two-position four-way valve, a hydraulic cylinder, a spiral pipe and a motor, wherein the two-position four-way valve is arranged on the hydraulic cylinder; two passages of each working position of the two-position four-way valve are respectively communicated to two sides of the hydraulic cylinder, and a piston rod of the hydraulic cylinder is connected with one end of a middle connecting rod; the spiral pipe is coaxially connected with the motor, the inner wall and the outer wall of the spiral pipe are provided with an inner track and an outer track which are formed by spiral grooves, the rotating directions of the two tracks are opposite, and two ends of the two tracks are respectively positioned on the same section; the other end of the middle connecting rod is fixed with one end of an inner sliding rod and one end of an outer sliding rod, the inner sliding rod and the outer sliding rod are fixed and parallel to each other, the free end of the inner sliding rod extends into the spiral pipe, the free end of the outer sliding rod is located on the outer side of the spiral pipe, and the free end of the inner sliding rod and the free end of the outer sliding rod are provided with outer sliding blocks in sliding fit with the inner track and the outer track. With little radial volume, and under the unchangeable condition of motor rotation direction, realized the pump-in of fluid, pump out the function, the structure is uncomplicated, has reduced the probability of trouble.

Description

Electric direct-drive pumping and discharging device
Technical Field
The invention belongs to the field of petroleum logging, and relates to an electric direct-drive pumping and discharging device.
Background
The function of the module in the current formation tester to pump in and out fluid is to pump formation fluid into the instrument for sampling and to discharge the failed fluid. The function is realized through hydraulic system drive reciprocating motion's piston, and hydraulic system uses hydraulic oil as the indirect control fluid of medium, and the structure is complicated, causes the instrument too big, and system reliability is low, and efficiency is on the low side to working space during the well logging is narrow and small, can't use the main equipment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an electric direct-drive pump discharging device which is small in diameter, capable of realizing the functions of pumping in and out fluid and high in efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a pumping and discharging device of an electric direct-drive pump comprises a two-position four-way valve, a hydraulic cylinder, a spiral pipe and a motor;
two passages of each working position of the two-position four-way valve are respectively communicated to two sides of the hydraulic cylinder, and a piston rod of the hydraulic cylinder is connected with one end of a middle connecting rod;
the spiral pipe is coaxially connected with the motor, an inner track formed by spiral grooves is arranged on the inner wall of the spiral pipe, an outer track formed by spiral grooves is arranged on the outer wall of the spiral pipe, the rotating directions of the inner track and the outer track are opposite, two ends of the two tracks are respectively positioned on the same cross section, the depth of one end, close to the motor, of one track is gradually changed into 0, and the depth of the other end, far away from the motor, of the other track is gradually changed into 0;
the other end of intermediate link is fixed with the one end of interior slide bar and outer slide bar, interior slide bar and outer slide bar reciprocal anchorage and parallel, it stretches into in the spiral pipe to slide the bar free end, be provided with on the interior slide bar free end with interior track sliding fit's interior sliding block, outer slide bar free end is located the spiral pipe outside, be provided with on the outer slide bar free end with outer track sliding fit's outer sliding block, the interval of interior sliding block and outer sliding block equals the spiral pipe wall thickness and subtracts interior track or outer orbital degree of depth, the length of interior slide bar and outer slide bar is not less than the one end that the spiral pipe is close to intermediate link and the distance of the one end that intermediate link was kept away from to interior track or outer track.
Preferably, at two ends of the inner rail and the outer rail, the angle between the rail expansion line and the axis gradually becomes 90 degrees.
Preferably, a control rod of the two-position four-way valve is connected with a piston rod of the hydraulic cylinder, and the control rod moves back and forth to control the switching of the working positions of the two-position four-way valve.
Preferably, one end of the middle connecting rod, which is close to the spiral tube, is provided with a sliding groove, and one ends of the inner sliding rod and the outer sliding rod are connected in the sliding groove in a sliding manner through the connecting rod.
Preferably, the middle connecting rod is provided with two groups of parallel inner sliding rods and two groups of parallel outer sliding rods, the two groups of inner sliding rods are the same in length as the two groups of outer sliding rods, one group of inner sliding rods and one group of outer sliding rods are respectively arranged at one radial ends of the inner track and the outer track, and the other group of inner sliding rods and the other group of outer sliding rods are respectively arranged at the other radial ends of the inner track and the outer track.
Preferably, a speed reducer is connected between the motor and the spiral pipe.
Preferably, the inner sliding block and the outer sliding block are both rollers.
Compared with the prior art, the invention has the following beneficial effects:
the invention realizes the matching switching with the inner sliding block and the outer sliding block through the change of the two ends of the inner track and the outer track, thereby reversing the linear motion of the sliding rod. The intermediate connecting rod reciprocates to make the piston inside the hydraulic cylinder reciprocate. And simultaneously, the piston drives the valve core of the two-position four-way valve to move. Positive pressure and negative pressure are respectively arranged in cavities on two sides of a piston in the hydraulic cylinder, and are switched along with the stroke, the reciprocating motion of the hydraulic cylinder realizes the pumping and pumping of fluid, the volume of the hydraulic cylinder is small, the pumping and pumping functions of the fluid are realized under the condition that the rotation direction of a motor is not changed, the structure is not complex, and the failure probability is reduced.
Furthermore, the included angles between the two end parts of the inner track and the outer track and the axis are gradually changed into 90 degrees, so that when the inner sliding rod or the outer sliding rod moves to one end of the track, the axial moving speed is reduced, severe impact is avoided during reversing, and the linear reciprocating speed is gradually reduced to 0 and then is reversed.
Furthermore, the control rod for controlling the switching of the working positions is connected with the piston rod of the hydraulic cylinder, so that the switching of the fluid pipelines is realized at two ends of each stroke, and the automatic switching of the working positions is realized.
Furthermore, the stability of the device is improved by arranging two groups of parallel inner sliding rods and outer sliding rods.
Furthermore, the rollers are in sliding fit with the inner rail and the outer rail, so that friction is reduced, and the failure rate is reduced.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a cross-sectional view of the apparatus of the present invention;
FIG. 3 is a schematic view of the outer track drive of the present invention;
FIG. 4 is a schematic illustration of the internal track drive of the present invention;
FIG. 5 is a half sectional view of a spiral pipe of the present invention;
FIG. 6 is an expanded view of the track of the present invention;
FIG. 7 is a schematic diagram of the switching of the tracks at the P-P direction cross section of FIG. 5 according to the present invention;
FIG. 8 is a schematic diagram of the switching of the tracks at the Q-Q direction cross section of FIG. 5 according to the present invention.
Wherein: 1-a two-position four-way valve; 2-a fluid pipe; 3-a hydraulic cylinder; 4-intermediate link; 5-a spiral pipe; 6-a speed reducer; 7-a motor; 8-a control lever; 9-a piston; 10-outer sliding rod; 11-inner slide bar; 12-an outer track; 13-an inner track; 14-inner rollers; 15-outer rollers.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 and 2, the electric direct-drive pumping and exhausting device comprises a two-position four-way valve 1, a fluid pipe 2, a hydraulic cylinder 3, an intermediate connecting rod 4, a spiral pipe 5, a motor 7 and a speed reducer 6.
Two passages of each working position of the two-position four-way valve 1 are communicated to two sides of the hydraulic cylinder 3 through the fluid pipe 2 respectively, a piston 9 rod of the hydraulic cylinder 3 is connected with one end of the middle connecting rod 4, a control rod 8 of the two-position four-way valve 1 is connected with the piston 9 rod of the hydraulic cylinder 3, and the control rod 8 moves back and forth to control the switching of the working positions of the two-position four-way valve 1.
Spiral pipe 5 and motor 7 coaxial coupling, be connected with reduction gear 6 between motor 7 and the spiral pipe 5, the spiral pipe 5 inner wall is provided with the interior track 13 of spiral helicine groove formation, the outer wall is provided with the outer track 12 of spiral helicine groove formation, the rotation of interior track 13 and outer track 12 is opposite, and two orbital both ends are equallyd divide and do not lie in same cross-section, the one end degree of depth that one of them track is close to motor 7 becomes 0 gradually, the one end degree of depth that motor 7 was kept away from to another track becomes 0 gradually, the both ends of interior track 13 and outer track 12, the track is expanded the line and is become 90 gradually with the contained.
The other end of the middle connecting rod 4 is fixed with one end of an inner sliding rod 11 and one end of an outer sliding rod 10, the inner sliding rod 11 and the outer sliding rod 10 are fixed with each other and parallel, the other end of the middle connecting rod 4 is provided with a sliding groove, and one end of the inner sliding rod 11 and one end of the outer sliding rod 10 are connected in the sliding groove in a sliding mode through a connecting rod. The free end of the inner sliding rod 11 extends into the spiral tube 5, the free end of the inner sliding rod 11 is provided with an inner sliding block in sliding fit with the inner rail 13, the free end of the outer sliding rod 10 is positioned outside the spiral tube 5, the free end of the outer sliding rod 10 is provided with an outer sliding block in sliding fit with the outer rail 12, the distance between the inner sliding block and the outer sliding block is equal to the depth of subtracting the inner rail 13 or the outer rail 12 from the wall thickness of the spiral tube 5, and the length of the inner sliding rod 11 and the length of the outer sliding rod 10 are not less than the distance between one end of the spiral tube 5, close to the middle connecting rod 4, and one end of the inner rail 13 or.
The middle connecting rod 4 is provided with two groups of parallel inner sliding rods 11 and outer sliding rods 10, the two groups of inner sliding rods 11 and outer sliding rods 10 are the same in length, one group of inner sliding rods 11 and outer sliding rods 10 are respectively arranged at one radial ends of the inner rail 13 and the outer rail 12, and the other group of inner sliding rods 11 and outer sliding rods 10 are respectively arranged at the other radial ends of the inner rail 13 and the outer rail 12.
The inner sliding block and the outer sliding block are both rollers.
In the middle of the inner rail 13 and the outer rail 12, the included angle between the rail expansion line and the axis is the lead angle of the spiral line.
When the electric direct-drive pump exhaust system works, the spiral pipe 5 is directly driven to rotate after being decelerated by the motor 7 and the speed reducer 6, and the rotating directions of the inner track 13 and the outer track 12 are opposite. The end part of the sliding rod is provided with two rollers, and only one of the two rollers moves in the track at any time to drive the intermediate connecting rod 4 to axially and linearly move. The inner slide rod 11 and the outer slide rod 10 drive the intermediate connecting rod 4 to reciprocate, so that the piston 9 in the hydraulic cylinder 3 can reciprocate. Inside and outside switching is realized at the two ends of the spiral pipe 5 through the depth change of the two ends of the track, and further the linear motion of the middle connecting rod 4 is reversed. Meanwhile, the piston 9 drives the valve core of the two-position four-way valve 1 to move, and the two ends of each stroke are switched to realize the fluid pipeline 2. The cavities on the two sides of the piston 9 in the hydraulic cylinder 3 are respectively provided with positive pressure and negative pressure, and are switched along with the stroke, and the reciprocating motion of the hydraulic cylinder 3 realizes the suction and the pumping out of fluid.
As shown in fig. 3 and 4, the inner rail 13 and the outer rail 12 are fixed together and rotate with the driving of the motor 7 and the reducer 6, when the outer roller 15 enters the outer rail, the depth of one end of the inner rail 13 gradually becomes 0, the inner roller 14 is extruded towards the axis direction, the inner roller 14 is separated from the inner rail, the inner sliding rod 11 and the outer sliding rod 10 slide towards the center along the sliding groove in the middle connecting rod 4 through the connecting rod, and simultaneously the outer sliding rod 10 moves towards the right side in a straight line under the driving of the outer rail; when the movement is reversed, the depth of one end of the outer rail 12 gradually changes to 0, the outer roller 15 is extruded outwards, the outer roller 15 gradually separates from the outer rail, the inner roller 14 gradually enters the inner rail, as shown in the lower drawing of fig. 3, under the action of the inner rail, the sliding rod slides outwards along the sliding groove in the middle connecting rod 4, and the sliding rod simultaneously moves linearly towards the left side.
As shown in fig. 5, the outer track and the inner track are fixed together, the rotation directions are opposite, and the starting position and the ending position of the spiral line are on the same section. As can be seen in the track development shown in FIG. 6, the spiral is switched from track to track by section A, taking the outer track as an example1B1、E1F1And a reversing buffer section B1C1、D1E1In the steady running section C1D1Is composed of a track switching section A1B1、E1F1A with inner rail2B2、E2F2On the same cross section, the helix of the sectionThe switching of the inner track and the outer track 12 is realized in a radius changing mode; reversing buffer section B1C1、D1E1The effect of the reversing mechanism is to avoid violent impact generated during reversing so that the linear reciprocating motion speed is gradually reduced to 0 and then the reversing is performed.
As shown in FIG. 7, which is a schematic representation of the track switching at the P-P section in FIG. 5, the track switching section A1B1、A2B2The section of curve with the changed radius drives the outer sliding rod 10 to slide through the change of the radius, so that the outer roller 15 enters the outer track, and meanwhile, the inner roller 14 is separated from the inner track; as shown in FIG. 8, which is a schematic representation of the track switching at section Q-Q in FIG. 5, the track switching section E1F1、E2F2Which is also a curve with a varying radius, by which the outer sliding rod 10 is driven to slide so that the outer roller 15 is separated from the outer track, while the inner roller 14 enters the inner track.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (7)

1. An electric direct-drive pumping and discharging device is characterized by comprising a two-position four-way valve (1), a hydraulic cylinder (3), a spiral pipe (5) and a motor (7);
two passages of each working position of the two-position four-way valve (1) are respectively communicated to two sides of the hydraulic cylinder (3), and a piston (9) rod of the hydraulic cylinder (3) is connected with one end of the middle connecting rod (4);
the spiral pipe (5) is coaxially connected with the motor (7), an inner track (13) formed by a spiral groove is arranged on the inner wall of the spiral pipe (5), an outer track (12) formed by a spiral groove is arranged on the outer wall of the spiral pipe (5), the rotating directions of the inner track (13) and the outer track (12) are opposite, two ends of the two tracks are respectively positioned on the same cross section, the depth of one end, close to the motor (7), of one track is gradually changed into 0, and the depth of the other end, far away from the motor (7), of the other track is gradually changed into 0;
the other end of the middle connecting rod (4) is fixed with one end of an inner sliding rod (11) and one end of an outer sliding rod (10), the inner sliding rod (11) and the outer sliding rod (10) are fixed with each other and are parallel, the free end of the inner sliding rod (11) extends into the spiral pipe (5), an inner sliding block in sliding fit with the inner track (13) is arranged at the free end of the inner sliding rod (11), the free end of the outer sliding rod (10) is located on the outer side of the spiral pipe (5), an outer sliding block in sliding fit with the outer track (12) is arranged at the free end of the outer sliding rod (10), the distance between the inner sliding block and the outer sliding block is equal to the distance between the wall thickness of the spiral pipe (5) and the depth of the inner track (13) or the outer track (12), and the lengths of the inner sliding rod (11) and the outer sliding rod (10) are not less than the distance between one end, close to the middle connecting rod (4), of the spiral pipe (5) and one end, far away from the middle connecting rod (4), of the inner track (13).
2. An electric direct drive pump discharge apparatus as claimed in claim 1, characterised in that the angle of the track development line to the axis is progressively changed to 90 ° at both ends of the inner track (13) and outer track (12).
3. The electric direct-drive pumping and exhausting device as recited in claim 1, wherein a control rod (8) of the two-position four-way valve (1) is connected with a piston (9) of the hydraulic cylinder (3), and the control rod (8) moves back and forth to control the switching of the working positions of the two-position four-way valve (1).
4. An electric direct drive pump exhaust device according to claim 1, characterized in that the end of the intermediate connecting rod (4) near the spiral pipe (5) is provided with a chute, and one ends of the inner sliding rod (11) and the outer sliding rod (10) are slidably connected in the chute through a connecting rod.
5. An electric direct drive pump exhaust device according to claim 1, characterized in that the intermediate connecting rod (4) is provided with two sets of parallel inner (11) and outer (10) sliding rods, the two sets of inner (11) and outer (10) sliding rods being of the same length, one set of inner (11) and outer (10) sliding rods being provided at one radial end of the inner (13) and outer (12) tracks, respectively, and the other set of inner (11) and outer (10) sliding rods being provided at the other radial end of the inner (13) and outer (12) tracks, respectively.
6. An electric direct drive pump discharge apparatus as claimed in claim 1, characterised in that a speed reducer (6) is connected between the motor (7) and the spiral pipe (5).
7. An electric direct drive pump exhaust device as claimed in claim 1, wherein the inner and outer sliding blocks are rollers.
CN201910636298.8A 2019-07-15 2019-07-15 Electric direct-drive pumping and discharging device Active CN110469481B (en)

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Application Number Priority Date Filing Date Title
CN201910636298.8A CN110469481B (en) 2019-07-15 2019-07-15 Electric direct-drive pumping and discharging device

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Application Number Priority Date Filing Date Title
CN201910636298.8A CN110469481B (en) 2019-07-15 2019-07-15 Electric direct-drive pumping and discharging device

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CN110469481B true CN110469481B (en) 2021-03-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105545625A (en) * 2016-01-15 2016-05-04 徐浩钟 Environment-friendly energy-saving pumping and draining device
CN106762526A (en) * 2016-12-20 2017-05-31 中国人民解放军海军医学研究所 Gas exhaust device and its application method
CN106837225A (en) * 2017-01-11 2017-06-13 西南石油大学 A kind of motion of hydraulic telescopic type downhole tractor
CN107503996A (en) * 2017-09-08 2017-12-22 王少斌 A kind of integrating device of motor precise synchronization control hydraulic oil and fluid displacement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105545625A (en) * 2016-01-15 2016-05-04 徐浩钟 Environment-friendly energy-saving pumping and draining device
CN106762526A (en) * 2016-12-20 2017-05-31 中国人民解放军海军医学研究所 Gas exhaust device and its application method
CN106837225A (en) * 2017-01-11 2017-06-13 西南石油大学 A kind of motion of hydraulic telescopic type downhole tractor
CN107503996A (en) * 2017-09-08 2017-12-22 王少斌 A kind of integrating device of motor precise synchronization control hydraulic oil and fluid displacement

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