CN108240216B - Gas lift oil extraction plunger operation time testing device and method - Google Patents

Gas lift oil extraction plunger operation time testing device and method Download PDF

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Publication number
CN108240216B
CN108240216B CN201611224456.1A CN201611224456A CN108240216B CN 108240216 B CN108240216 B CN 108240216B CN 201611224456 A CN201611224456 A CN 201611224456A CN 108240216 B CN108240216 B CN 108240216B
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plunger
gas lift
ring
pipe
lift valve
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CN108240216A (en
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张昊
王磊
孙成林
杨辉
高文明
高翔
刘宇飞
刘晓旭
强晓光
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Petrochina Co Ltd
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Petrochina Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/008—Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Mining & Mineral Resources (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Details Of Valves (AREA)

Abstract

The invention discloses a device and a method for testing the running time of a gas lift oil extraction plunger, and belongs to the field of oil field testing. The device comprises a gas lift valve working barrel, an inner pipe short section, an inner pipe, an outer pipe and a lower plugging piece, wherein the gas lift valve working barrel, the inner pipe short section, the inner pipe and the outer pipe are communicated in sequence; the gas lift valve gas outlet is communicated with the inner cavity of the gas lift valve working barrel; the upper end of the plunger support is used for seating a plunger, and the lower end of the plunger support is provided with a lower power-on ring which is communicated with two first conducting rings at the lower end of a first elastic fixing piece which plays a clearance fit role in an inner cavity at the joint of the gas lift valve working cylinder and the inner pipe nipple; a middle plugging piece for plugging the upper end of the outer pipe, wherein an air inlet joint is arranged on the middle plugging piece; the upper plugging piece is used for plugging the upper end of the inner tube, and two second conducting rings communicated with an upper electric connection tube which can slide up and down in the inner part are arranged on the upper plugging piece; when the first conducting ring and the lower conducting ring are connected or the second conducting ring and the upper conducting tube are connected, the timing electric control box receives a timing starting or stopping signal and sends a timing starting or stopping control instruction to the electronic stopwatch.

Description

Gas lift oil extraction plunger operation time testing device and method
Technical Field
The invention relates to the field of oilfield tests, in particular to a device and a method for testing the running time of a gas lift oil extraction plunger.
Background
Along with the reduction of the crude oil self-blowing yield in the oil well or after the oil well loses the self-blowing capability, the crude oil yield can be improved in a plunger gas lift oil extraction mode, so that the oil well can maintain the self-blowing production. The plunger can move up and down in a wellhead Christmas tree and an oil pipe, when the pressure and the flow of fluid in an oil pipe column are not enough to lift the plunger, the plunger moves down under the action of self gravity, and the fluid (gas-liquid mixture) at the lower end of the plunger flows into the upper end of the plunger through a gap between the outer edge of the plunger and the inner wall of the oil pipe; when the fluid pressure at the lower end of the plunger rises, the plunger is lifted to the wellhead and the fluid at the upper end of the plunger is pushed into the tubing at the surface to maintain the well in production from a blowout. However, the structure and the model of the plunger are various, and the stress condition of various plungers in the oil pipe is not clear, so that the plunger matched with the oil well is not easy to select, and the situation that the plunger is blocked in the oil pipe or the lifting liquid quantity of the plunger is too small easily occurs. Therefore, it is necessary to analyze the stress condition of the plungers with different structures and types in the oil pipe so as to select the plungers matched with different oil wells to maintain the self-injection production of the oil wells for a long time.
As a related art, patent document CN104343421A provides a gas lift simulation test system, including: the gas lift testing device comprises an outer sleeve, an inner sleeve, a gas lift testing string and a wellhead device, wherein the inner sleeve is arranged in the outer sleeve, a first annular space is formed between the inner sleeve and the outer sleeve, the gas lift testing string is arranged in the inner sleeve, a second annular space is formed between the gas lift testing string and the inner sleeve, the first annular space is communicated with the bottom of the second annular space, and the upper ends of the outer sleeve, the inner sleeve and the gas lift testing string are fixed and sealed with the wellhead device; the liquid supply system is communicated with the first annular space, and liquid medium enters the bottom of the gas lift test tubular column from the bottom of the first annular space; the gas supply system is communicated with the second annular space and provides air pressure for the second annular space so that the liquid medium rises from the bottom of the cavity of the gas lift test tubular column to enter a liquid drainage pipeline communicated with the top of the cavity of the gas lift test tubular column under the action of the air pressure; the separation system is communicated with the liquid discharge pipeline and used for collecting the liquid medium and carrying out gas-liquid separation, and the other end of the return separation system is connected to the underground liquid supply system; the test data acquisition system comprises a control unit positioned on the ground, a bottom hole pressure and temperature measuring device used for measuring bottom hole pressure and temperature and providing pressure parameters and temperature parameters for a bottom hole liquid supply system, a gas lift test tubular column pressure and temperature measuring device used for measuring the pressure and the temperature of each position of the second annular space from top to bottom, and an electromagnetic flowmeter used for measuring the liquid flow in the unloading process in the gas lift test tubular column.
The inventor finds that the prior art has at least the following problems:
the device provided by the prior art can measure the temperature, the pressure and the liquid flow of the gas lift adopting the plunger, and cannot analyze the stress condition of the plunger by recording the running time of the plunger through tests.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a device and a method for testing the operation time of a gas lift oil production plunger, which can analyze the stress condition of the plunger by recording the operation time of the plunger. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a device for testing an operation time of a gas lift oil production plunger, where the device includes, from bottom to top, a gas lift valve working cylinder, an inner tube nipple, an inner tube, and an outer tube that is sleeved outside the gas lift valve working cylinder and the inner tube nipple and forms an annular space, and the device further includes: the lower plugging piece is used for plugging the lower end of the outer pipe and the lower end of the gas lift valve working barrel; the gas lift valve is arranged on the outer wall of the gas lift valve working cylinder, and a gas outlet is communicated with the inner cavity of the gas lift valve working cylinder; the plunger support is provided with a through hole along the axial direction, the upper end of the plunger support is used for seating the plunger, the lower end of the plunger support is provided with a lower power ring, the plunger support penetrates through a first elastic fixing piece arranged in an inner cavity at the joint of the gas lift valve working cylinder and the inner pipe nipple in a clearance fit mode, and the lower end of the first elastic fixing piece is provided with two first conducting rings communicated with the lower power ring; the middle plugging piece plugs the upper end of the outer pipe and connects the upper end of the inner pipe nipple with the lower end of the inner pipe, and an air inlet joint communicated with the annular space is arranged on the middle plugging piece; the upper plugging piece is used for plugging the upper end of the inner pipe and is provided with an axially communicated inner cavity, two second conducting rings are arranged on the upper plugging piece, a second elastic fixing piece is arranged in the inner cavity, and an upper connecting pipe slides up and down along the second elastic fixing piece in a clearance fit manner and is used for being communicated with the second conducting rings; an air outlet joint communicated with the inner cavity is arranged on the upper plugging piece; the timing electric control box is electrically connected with the two first conducting rings and the two second conducting rings through conducting wires respectively; and the electronic stopwatch is electrically connected with the timing electric control box through two wires.
When the first conducting ring and the lower conducting ring are connected, the timing electric control box receives a timing starting signal and then sends a timing starting control instruction to the electronic stopwatch; when the second conducting ring and the upper power connection pipe are connected, the timing electric control box receives a timing stopping signal and then sends a timing stopping control instruction to the electronic stopwatch.
Specifically, the lower plugging piece preferably comprises an outer pipe bottom plug, a lower insulating plug and an outer pipe coupling; the upper end of the outer tube bottom plug is axially provided with a blind hole, the lower end of the gas lift valve working cylinder is placed in the blind hole, and the bottom of the outer tube bottom plug is provided with two first binding posts; the lower insulating plug seals and blocks the lower end of the gas lift valve working cylinder in a sealing manner, two second wiring terminals electrically connected with the first wiring terminals are further arranged on the lower insulating plug, and the two first conducting rings are respectively connected with two conducting wires and are respectively and sequentially electrically connected with the two second wiring terminals, the two first wiring terminals and the timing electric cabinet through the conducting wires; the outer pipe coupling is fixedly sleeved at the upper end of the outer pipe bottom plug and the lower end of the outer pipe.
In particular, preferably, the lower blocking piece further comprises at least one first O-ring rubber seal for sealing an annular gap between the lower insulating plug and the gas lift valve working cylinder.
Specifically, preferably, the plunger support comprises a plunger support head and a cylindrical support body which are sequentially connected and communicated from top to bottom; the first elastic fixing piece comprises a clamping ring, an insulating ring pressing ring, an insulating ring, a lower spring and an inner pipe lower coupling; the outer wall of the clamping ring abuts against the inner wall of the inner pipe nipple, and the lower end of the clamping ring abuts against the upper end of the gas lift valve working barrel; the insulating ring pressing ring is sleeved in the clamping ring; the insulating ring is sleeved inside the lower end of the clamping ring, the upper end of the insulating ring abuts against the lower end of the insulating ring pressing ring, and meanwhile, the cylindrical support body penetrates through the insulating ring in a clearance fit mode; the lower power ring is sleeved on the cylindrical support body and extends out of the lower end of the insulating ring, and the two first conducting rings are arranged at the lower end of the insulating ring; the lower spring is sleeved on the cylindrical support body and is in a compressed state, and is positioned between the plunger support head and the insulating ring; the inner pipe lower coupling is fixedly sleeved on the upper end of the gas lift valve working barrel and the lower end of the inner pipe short section.
Specifically, preferably, the middle plugging piece comprises an inner pipe hanger, an outer pipe joint and a plurality of limit nails; the inner pipe hanger is of a cylindrical structure, the outer diameters of the upper end and the lower end of the inner pipe hanger are smaller than that of the middle part of the inner pipe hanger, so that a first annular step is formed on the outer wall of the inner pipe hanger, and the inner pipe hanger is fixedly sleeved at the lower end of the inner pipe and the upper end of the inner pipe nipple; the inner diameters of the upper end and the lower end of the inner wall of the outer pipe joint are larger than that of the middle part, so that a second annular step is formed on the inner wall, the lower end of the outer pipe joint is fixedly sleeved at the upper end of the outer pipe, and the upper end of the outer pipe is abutted against the bottom of the second annular step; the outer side of the first annular step is in sealing contact with the inner side of the second annular step, the lower end of the second annular step and the lower end of the inner pipe hanger form an annular gap communicated with the inner cavity of the outer pipe, and the air inlet joint is arranged on the second annular step and communicated with the annular gap; and fixing the inner pipe hanger and the outer pipe joint by using a plurality of limiting nails.
Specifically, preferably, the upper plugging piece comprises an inner tube upper joint, an upper insulating plug and a gland sleeved at the upper end of the inner tube upper joint; the inner cavity of the upper joint of the inner pipe is sequentially provided with a first-diameter cylindrical inner cavity, a middle-diameter cylindrical inner cavity, a small-diameter cylindrical inner cavity and a second large-diameter cylindrical inner cavity from top to bottom; the upper insulating plug comprises an insulating large cylindrical end arranged in the inner cavity of the first large-diameter cylinder and an insulating small cylindrical end arranged at the upper part of the inner cavity of the medium-diameter cylinder; the second elastic fixing piece comprises an upper connecting tube insulating ring and an upper spring; the upper part of the upper electric tube connecting insulating ring is fixed at the bottom of the inner cavity of the middle-diameter cylinder, and the lower part of the upper electric tube connecting insulating ring is sleeved in the inner cavity of the small-diameter cylinder in a sealing manner; the upper power receiving tube comprises a large cylindrical end and a small cylindrical end, wherein the large cylindrical end is axially slidably arranged in the middle-diameter cylindrical inner cavity, the small cylindrical end is axially slidably arranged in the small-diameter cylindrical inner cavity, and the lower end of the small cylindrical end is positioned in the second large-diameter cylindrical inner cavity; the upper end of the upper spring is sleeved on the small insulating cylindrical end, the upper end of the upper spring is abutted against the bottom of the large insulating cylindrical end, and the lower end of the upper spring is abutted against the bottom of the large insulating cylindrical end; the lower end of the large insulating cylindrical end is provided with two second conducting rings which are used for being communicated with the upper end of the large cylindrical end of the upper connecting tube; the air outlet joint is communicated with the inner cavity of the medium-diameter cylinder.
Specifically, preferably, the device further comprises two third terminals arranged on the end of the large insulating cylinder and two second terminal glands for fixing the two third terminals respectively; the two second conducting rings are respectively connected with the two third binding posts and are electrically connected with the timing electric cabinet through conducting wires.
Specifically, as preferred, the device still includes coupling and manometer on the inner tube, coupling and the suit is in with threaded connection's mode on the inner tube the upper end of inner tube with the lower extreme of inner tube top connection, be provided with on the lateral wall of coupling on the inner tube with the internal thread hole that the inner chamber of inner tube is linked together, the screwed connection of manometer with internal thread hole threaded connection.
Specifically, as preferred, the timing electric cabinet includes a first intermediate relay, a second intermediate relay, a first time relay, a second time relay, a first resistor, a second resistor, a third resistor, and a power supply.
One of the first conductive rings is connected with one end of the power supply through a conducting wire, the other first conductive ring is connected with the coil of the first intermediate relay, the second resistor and the first resistor in series through conducting wires, and the coil of the first time relay is connected with the coil of the first intermediate relay in parallel; one of the second conducting rings is connected with one end of the power supply through a conducting wire, the other second conducting ring is connected with the coil of the second intermediate relay and the third resistor in series through conducting wires and then connected with the first conducting ring, the coil of the first intermediate relay and the second resistor in parallel, and the coil of the second time relay is connected with the coil of the second intermediate relay in parallel; the normally open contact of the first intermediate relay is connected with the normally closed contact of the first time relay in series, then is connected with the normally open contact of the second intermediate relay and the normally closed contact of the second time relay in parallel, and then is electrically connected with the internal circuit of the electronic stopwatch through a lead.
In a second aspect, the present invention also provides a method for testing the running time of a plunger by using the above apparatus, where the method includes:
gaseous annular space that gets into between outer tube and inner tube nipple joint, the gas lift valve working barrel by the air inlet joint, along with the increase of atmospheric pressure, the gas lift valve is opened, and gaseous entering in the gas lift valve working barrel, along with the increase of gas pressure in the gas lift valve working barrel, gaseous through-hole that is held in the palm by the plunger upwards promotes plunger upward movement on holding in the palm, the plunger leaves the plunger holds in the palm the back, because the spring takes place elastic recovery down, promotes plunger holds in the palm upward movement, the plunger holds in the palm under the drive electrical ring and two first conducting rings switch-on, and the timing electric cabinet is received and is started timing signal and processing, then sends the control command that starts timing to the electron stopwatch, the electron stopwatch starts timing.
The plunger moves upwards to the upper plugging piece to abut against the upper connecting pipe, the upper connecting pipe moves upwards and is communicated with the two second conducting rings, the timing electric control box receives and processes a timing stopping signal and then sends a timing stopping control instruction to the electronic stopwatch, and the electronic stopwatch stops timing.
Meanwhile, the gas entering the gas lift valve working barrel sequentially enters the inner pipe short section and the inner pipe from the gas lift valve working barrel and is output by the gas outlet joint.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the device for testing the running time of the gas lift oil production plunger provided by the embodiment of the invention provides basic conditions for indoor tests for simulating the motion conditions of plungers with different structures or types in an oil pipe under different gas injection pressure conditions by arranging the components such as the gas lift valve working cylinder, the inner pipe short section, the inner pipe, the outer pipe, the gas lift valve, the lower plugging piece, the plunger support, the middle plugging piece, the upper plugging piece, the timing electric control box, the electronic stopwatch and the like. By using the device for testing the operation time of the gas lift oil extraction plunger, the time of the plunger from the plunger support to the upper end of the inner pipe can be accurately obtained, and then the stress condition of the plunger can be analyzed according to the time and the operation distance of the plunger, so that the stress condition of the plungers with different structures and models in the oil pipe can be analyzed, the later-stage selection of the plungers matched with the oil well is facilitated for gas lift oil extraction, the crude oil extraction efficiency is improved, and the self-injection period of oil well production is prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a gas lift oil recovery plunger runtime testing apparatus provided by an embodiment of the present invention;
FIG. 2-1 is a sectional view of a partial structure of a gas lift oil recovery plunger runtime testing apparatus provided in an embodiment of the present invention;
2-2 are sectional views of partial structures of the gas lift oil recovery plunger runtime testing device provided by the embodiment of the invention;
2-3 are sectional views of partial structures of the gas lift oil recovery plunger runtime testing device provided by the embodiment of the invention;
fig. 3 is a schematic circuit diagram between the electric timing control box and the electronic stopwatch according to the embodiment of the present invention.
Wherein the reference numerals denote:
1a working cylinder of a gas lift valve,
2, a short section of an inner pipe,
3, an inner pipe is arranged in the inner pipe,
4, an outer tube, a first tube and a second tube,
5, a lower plugging piece is arranged on the lower part of the sealing piece,
501 the bottom of the outer pipe is blocked,
the insulating plug is positioned under the insulating plug 502,
503 an outer pipe collar,
6, a gas lift valve is arranged on the lower portion of the gas lift valve,
7 the plunger holder is arranged on the upper portion of the plunger,
the plunger piston is 8, and the plunger piston is,
9 is connected with a power-on ring at the lower part,
10 a first elastic fixing member which is provided with a first elastic fixing member,
1001 to which the ring is to be locked,
1002 the insulating ring is pressed on the ring,
1003 an insulating ring, which is made of a plastic material,
1004 of the spring is arranged at the lower part of the spring,
1005 the lower collar of the inner pipe,
11 a first electrically conductive ring, 11,
12. in the first embodiment of the closure part,
1201-the tubing hanger is placed inside the casing,
1202 an outer tube-to-tube joint,
1203 the position-limiting nail,
13 an air inlet joint is arranged on the air inlet pipe,
14, a blocking piece is arranged on the upper part of the sealing piece,
1401 the upper joint of the inner pipe is connected with the lower joint,
1402, an insulating plug is arranged on the upper surface of the insulating plug,
1403 is pressed and covered,
15 a second electrically conductive ring, and 15,
16 a second resilient mounting member for mounting to a second,
a tube insulating ring is connected to the upper part of 1601,
1602 a spring is provided on the upper surface of the body,
a tube is connected to the upper part of the tube 17,
18 a joint at the air outlet of the air outlet,
a time-measuring electric control box of 19 degrees,
20 an electronic time-of-day watch,
21a first terminal post for a first terminal,
22 a second terminal post for a second terminal,
23 a first terminal pressing cover is arranged on the first terminal,
24 a third terminal post for connecting a power supply to a power supply,
25 a second terminal pressing cover is arranged on the first terminal,
26 the inner pipe is connected with a coupling,
a pressure gauge of 27 gauge is provided,
28 the nut is arranged in the groove of the nut,
KA1M coil of the first intermediate relay,
KA1D normally open contact of the first intermediate relay,
KA2M coil of the second intermediate relay,
KA2D normally open contact of the second intermediate relay,
the coil of the KT1M first time relay,
the normally closed contact of the KT1D first time relay,
KT2M coil of the second time relay,
the normally closed contact of the KT2D second time relay,
the first resistance of the resistor R1 is,
the resistance of the second resistor R2 is smaller,
the third resistance of the resistor R3 is,
and E, a power supply.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art. In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a gas lift oil production plunger operation time testing device, which comprises a gas lift valve working cylinder 1, an inner pipe short section 2, an inner pipe 3, an outer pipe 4, a lower plugging piece 5, a gas lift valve 6, a plunger support 7, a lower power connection ring 9, a first elastic fixing piece 10, a first conducting ring 11, a middle plugging piece 12, an upper plugging piece 14, a timing electric control box 19 and an electronic stopwatch 20, wherein the gas lift valve working cylinder 1, the inner pipe short section 2, the inner pipe 3, the outer pipe 4, the lower plugging piece 5, the gas lift valve 6, the plunger support 7, the lower power connection ring 9, the first elastic fixing piece 10, the first conducting ring 11, the. Wherein, the lower plugging piece 5 is used for plugging the lower end of the outer pipe 4 and the lower end of the gas lift valve working barrel 1; the gas lift valve 6 is arranged on the outer wall of the gas lift valve working barrel 1, and the gas outlet is communicated with the inner cavity of the gas lift valve working barrel 1; the plunger support 7 is provided with a through hole along the axial direction, the upper end of the plunger support is used for seating a plunger 8, the lower end of the plunger support is provided with a lower electric ring 9, the plunger support penetrates through a first elastic fixing piece 10 arranged in an inner cavity at the joint of the gas lift valve working cylinder 1 and the inner pipe nipple 2 in a clearance fit mode, and the lower end of the first elastic fixing piece 10 is provided with two first electric rings 11 used for being communicated with the lower electric ring 9; the middle plugging piece 12 plugs the upper end of the outer pipe 4, and connects the upper end of the inner pipe nipple 2 with the lower end of the inner pipe 3, and the middle plugging piece 12 is provided with an air inlet joint 13 communicated with the annular space; the upper plugging piece 14 plugs the upper end of the inner pipe 3 and is provided with an axially communicated inner cavity, the upper plugging piece 14 is provided with two second conducting rings 15, a second elastic fixing piece 16 is arranged in the inner cavity, and an upper connecting pipe 17 slides up and down along the second elastic fixing piece 16 in a clearance fit manner and is used for being communicated with the second conducting rings 15; an air outlet joint 18 communicated with the inner cavity is arranged on the upper plugging piece 14; the timing electric control box 19 is electrically connected with the two first conducting rings 11 and the two second conducting rings 15 through conducting wires respectively; the electronic stopwatch 20 is electrically connected with the timing electric control box 19 through two wires.
When the first conductive ring 11 and the lower conductive ring 9 are connected, the timing electric control box 19 receives a timing starting signal and then sends a timing starting control instruction to the electronic stopwatch 20; when the second conductive ring 15 and the upper connecting pipe 17 are connected, the timing electric control box 19 receives the timing stop signal and then sends a control instruction for stopping timing to the electronic stopwatch 20.
The working principle of the gas lift oil extraction plunger operation time testing device provided by the embodiment of the invention is described as follows:
the pipeline on the gas cylinder is communicated with a gas inlet joint 13, then gas is input into the annular space of an outer pipe 4 and an inner pipe short section 2 through the gas inlet joint 13, a gas lift valve 6 is opened along with the increase of the gas pressure, the gas enters a gas lift valve working barrel 1, the gas pushes a plunger 8 on a plunger support 7 upwards through a through hole of the plunger support 7 along with the increase of the gas pressure in the gas lift valve working barrel 1, the downward pressure generated by the gravity of the plunger 8 on the plunger support 7 disappears after the plunger 8 leaves the plunger support 7, under the elastic action of the first elastic fixing part 10, the plunger support 7 is pushed to move upwards, the plunger support 7 drives the lower electric connection ring 9 to be communicated with the two first electric connection rings 11, the timing electric control box 19 receives and processes a timing signal, then, a control command for starting the timekeeping is issued to the electronic stopwatch 20, and the electronic stopwatch 20 starts the timekeeping.
The plunger 8 moves upwards to the upper plugging piece 14 to impact the lower end of the upper connecting pipe 17, the upper connecting pipe 17 moves upwards and is communicated with the two second conducting rings 15, the timing electric control box 19 receives and processes the timing stopping signal, then a timing stopping control instruction is sent to the electronic stopwatch 20, and the electronic stopwatch 20 stops timing. Then the gas supply is stopped, the plunger 8 is seated on the plunger holder 7 by gravity, and the upper connecting tube 17 is seated on the plunger holder 7 by gravity and the second elastic fixing member 16, and is disconnected from the two second conductive rings 15. The plunger holder 7 moves downwards to the original position under the action of the gravity of the plunger 8, and the lower electric connection ring 9 at the lower end of the plunger holder 7 is disconnected with the two first electric conduction rings 11. Meanwhile, the gas entering the gas lift valve working barrel 1 sequentially enters the inner pipe nipple 2 and the inner pipe 3 through the gas lift valve working barrel 1 and is output through the gas outlet connector 18.
As will be understood by those skilled in the art, the start of the timekeeping causes the electronic stopwatch 20 to acquire a pulse signal, the timekeeping being started; the stop of the timing causes the electronic stopwatch 20 to obtain a pulse signal, and the timing is stopped, and the time between two pulse signals is the time of the plunger 8 running. It should be noted that the annular space is an annular space formed between the gas lift valve working cylinder 1, the inner pipe nipple 2 and the outer pipe 4 sleeved outside the inner pipe nipple and the outer pipe.
Based on the above, the device for testing the running time of the gas lift oil production plunger 8 provided by the embodiment of the invention provides basic conditions for indoor tests for simulating the movement conditions of plungers 8 with different structures or types in oil pipes under different gas injection pressure conditions by arranging the gas lift valve working cylinder 1, the inner pipe short section 2, the inner pipe 3, the outer pipe 4, the gas lift valve 6, the lower plugging piece 5, the plunger support 7, the middle plugging piece 12, the upper plugging piece 14, the timing electric control box 19, the electronic stopwatch 20 and the like. By using the device for testing the running time of the gas lift oil extraction plunger 8, the time of the plunger 8 running from the plunger support 7 to the upper end of the inner pipe 3 can be accurately obtained, and then the stress condition of the plunger 8 can be analyzed according to the time and the running distance of the plunger 8, so that the stress condition of the plungers 8 with different structures and types in the oil pipe under different gas injection pressure conditions can be conveniently obtained, the later-stage selection of the plunger 8 matched with the oil well for gas lift oil extraction is facilitated, the crude oil extraction efficiency is improved, and the self-blowing period of oil well production is prolonged.
Specifically, as shown in fig. 2-1, the lower plugging member 5 comprises an outer pipe bottom plug 501, a lower insulating plug 502 and an outer pipe coupling 503; the upper end of the outer tube bottom plug 501 is axially provided with a blind hole, the lower end of the gas lift valve working barrel 1 is placed in the blind hole, and the bottom of the outer tube bottom plug 501 is provided with two first binding posts 21; the lower insulating plug 502 seals and blocks the lower end of the gas lift valve working cylinder 1 in a sealing manner, two second binding posts 22 electrically connected with the first binding posts 21 are further arranged on the lower insulating plug 502, and the two first conducting rings 11 are respectively connected with two conducting wires and are respectively and sequentially electrically connected with the two second binding posts 22, the two first binding posts 21 and the timing electric control box 19 through the conducting wires; the outer pipe coupling 503 is fixedly sleeved on the upper end of the outer pipe bottom plug 501 and the lower end of the outer pipe 4. So set up down shutoff piece 5, the shutoff outer tube 4 lower extreme of being convenient for and the 1 lower extreme of gas lift valve working barrel set up first terminal 21 and second terminal 22, and the wire of being convenient for connect two first conducting rings 11 is connected outside timing electric cabinet 19 by the inner chamber of gas lift valve working barrel 1.
Specifically, two right-angle through holes communicated to the upper end of the bottom of the outer tube bottom plug 501 are radially and inwardly formed in the side wall of the outer tube bottom plug 501, and the two first binding posts 21 are fixed in the two right-angle through holes; two vertical through holes are formed in the lower insulating plug 502, and the two second terminals 22 are hermetically fixed in the two vertical through holes, respectively. The provision of the right-angle through-hole and the vertical through-hole facilitates the connection of the wires between the two first terminals 21 and the two second terminals 22, and the right-angle through-hole and the vertical through-hole are easily provided. Further, the device provided by the embodiment of the invention further comprises two first terminal pressing covers 23 which are respectively arranged in the two right-angle through holes and outside the outer pipe bottom plug 501, penetrate through the conducting wire and fix the two first terminals 21, so as to prevent the two first terminals 21 from protruding out of the two right-angle through holes. The two first terminal glands 23 include a large cylindrical end and a small cylindrical end, the large cylindrical end abuts against the side wall of the outer tube bottom plug 501, and the small cylindrical end penetrates into the right-angle through hole and is in threaded connection with the right-angle through hole.
More in detail, the blind hole of stifled 501 at the bottom of the outer tube is including big step hole and the little step blind hole that links to each other, forms annular step between big step hole and the little step blind hole, and the lower extreme of gas lift valve working barrel 1 is placed downthehole and offsets with big step hole bottom surface at big step, so sets up the structure of blind hole, is convenient for connect through the wire electricity between two first terminal 21 and two second terminal 22 and is connected.
Further, the lower plugging member 5 further comprises at least one first O-ring rubber seal for sealing an annular gap between the lower insulating plug 502 and the gas lift valve cylinder 1 to prevent gas from leaking out of the annular gap between the lower insulating plug 502 and the gas lift valve cylinder 1. Wherein, the outer wall of lower insulating stopper 502 edge circumference is provided with many rings of recesses, and a plurality of first O shape rubber seal circle are arranged in many rings of recesses respectively to the annular gap between sealed lower insulating stopper 502 and the gas lift valve working barrel 1.
The outer pipe coupling 503 is fixedly sleeved on the upper end of the outer pipe bottom plug 501 and the lower end of the outer pipe 4 in various ways, for example, the outer pipe bottom plug 501 and the outer pipe 4 are connected by sleeving in a threaded connection manner, and sleeving in a clamping manner. Preferably, the outer pipe coupling 503 is sleeved on the upper end of the outer pipe bottom plug 501 and the lower end of the outer pipe 4 in a threaded connection mode, and the threaded connection mode is easy to arrange and is convenient to disassemble and assemble. During installation, the outer pipe bottom plug 501 may be installed first, and after the outer pipe collar 503 is sleeved on the outer pipe bottom plug 501, the outer pipe 4 is sleeved in the outer pipe collar 503.
Specifically, in the embodiment of the invention, the central axis of the inner cavity of the gas lift valve working cylinder 1 is not in the same straight line with the central axis of the outer contour thereof, so that the wall thickness of the gas lift valve working cylinder 1 is different, an internal threaded hole is arranged on one side of the gas lift valve working cylinder 1 with the relatively thicker wall thickness, an inclined hole communicated with the inner cavity of the gas lift valve working cylinder 1 is arranged above the internal threaded hole, the gas lift valve 6 is in threaded connection with the internal threaded hole, so that gas entering the gas lift valve 6 enters the inner cavity of the gas lift valve working cylinder 1 from the inclined hole, the plunger 8 on the plunger support 7 is further pushed to move upwards, and the threaded connection mode is easy to set, so that different gas lift valves 6 can be replaced. Wherein, including the disk seat in the gas lift valve 6, the case, the inlet port, the venthole, the case lower part is connected with the bellows, case shutoff venthole, the inlet port is located the annular space between outer tube 4 and the gas lift valve working barrel 1, gaseous by air inlet joint 13 get into behind the annular space, along with the increase of atmospheric pressure, gaseous by the inlet port get into in the gas lift valve 6, and promote the bellows downstream in the gas lift valve 6, the case is along with the bellows downstream, and then open the venthole of gas lift valve 6, gaseous by the gas outlet entering gas lift valve working barrel 1's inner chamber of gas lift valve 6.
Specifically, in the embodiment of the present invention, as shown in fig. 2-2, the plunger holder 7 includes a plunger holder head and a cylindrical holder body which are sequentially connected and conducted from top to bottom; the first elastic fixing piece 10 comprises a clamping ring 1001, an insulating ring pressing ring 1002, an insulating ring 1003, a lower spring 1004 and an inner pipe lower ferrule 1005; the outer wall of the clamping ring 1001 abuts against the inner wall of the inner pipe nipple 2, and the lower end of the clamping ring abuts against the upper end of the gas lift valve working barrel 1; the insulating ring pressing ring 1002 is sleeved in the clamping ring 1001; an insulating ring 1003 is sleeved inside the lower end of the clamping ring 1001, the upper end of the insulating ring is abutted against the lower end of the insulating ring pressing ring 1002, and meanwhile, the cylindrical support body penetrates through the insulating ring 1003 in a clearance fit mode; the lower conductive ring 9 is sleeved on the cylindrical support body and extends out of the lower end of the insulating ring 1003, and the two first conductive rings 11 are arranged at the lower end of the insulating ring 1003; the lower spring 1004 is sleeved on the cylindrical support body and is in a compressed state, and is positioned between the plunger support 7 head and the insulating ring 1003; the inner pipe lower collar 1005 is fixedly sleeved at the upper end of the gas lift valve working barrel 1 and the lower end of the inner pipe nipple 2. The plunger support 7 and the first elastic fixing part 10 are arranged in such a way, so that when gas enters the cylindrical support body and the plunger support head from the through hole of the gas lift valve working cylinder 1, the plunger 8 is pushed to move upwards, because the downward pressure generated by the gravity of the plunger 8 on the plunger support 7 disappears, the lower spring 1004 is elastically restored to push the plunger support 7 to move upwards, the lower electric conduction ring 9 arranged at the lower end of the cylindrical support body also moves upwards along with the plunger support 7 to be communicated with the two first electric conduction rings 11 arranged at the lower end of the insulating ring 1003, and when the plunger 8 falls back to the plunger support 7 again, the gravity of the plunger 8 compresses the lower spring 1004 to enable the plunger support to move downwards, and the lower electric conduction ring 9 is disconnected with the two first electric conduction rings 11. And the lower spring 1004 sleeved on the cylindrical support body can give a buffer effect to the plunger support 7, so that the plunger 8 is prevented from colliding with the plunger support 7 and being damaged when falling onto the plunger support 7. The gas can enter the inner pipe nipple 2 and the inner pipe 3 through the through hole of the plunger support 7 and is discharged through the inner cavity of the inner pipe upper joint 1401 and the gas outlet joint 18.
More in detail, the cylinder support body of the plunger support 7 comprises a large cylinder, a middle cylinder and a small cylinder which are sequentially communicated from top to bottom, the lower end of the middle cylinder is placed in an inner cavity of the insulating ring 1003 in a clearance fit mode, the small cylinder is located in an inner cavity of the gas lift valve working cylinder 1, the lower power connection ring 9 is sleeved on the small cylinder, and the upper end face and the lower end face of the lower power connection ring 9 are respectively provided with at least one nut 28 which is sleeved on the small cylinder in a threaded connection mode so as to fasten the lower power connection ring 9. The cylindrical support body of the plunger support 7 is arranged in such a way that the small cylinder of the plunger support 7 moves upwards under the action of the elastic restoring force of the lower spring 1004, so that the lower power ring 9 is communicated with the two first conductive rings 11 at the lower end of the insulating ring 1003, when the plunger 8 falls back on the plunger support 7, the small cylinder of the plunger support 7 moves downwards again, and the lower power ring 9 is disconnected with the two first conductive rings 11.
Specifically, in the embodiment of the present invention, as shown in fig. 1, the middle blocking piece 12 includes an inner pipe hanger 1201, an outer pipe joint 1202, and a plurality of limit pins 1203; the inner pipe hanger 1201 is in a cylindrical structure, the outer diameters of the upper end and the lower end of the inner pipe hanger are smaller than that of the middle part of the inner pipe hanger, so that a first annular step is formed on the outer wall of the inner pipe hanger, and the inner pipe hanger 1201 is fixedly sleeved at the lower end of the inner pipe 3 and the upper end of the inner pipe nipple 2; the inner diameters of the upper end and the lower end of the inner wall of the outer pipe joint 1202 are larger than that of the middle part, so that a second annular step is formed on the inner wall, the lower end of the outer pipe joint 1202 is fixedly sleeved at the upper end of the outer pipe 4, and the upper end of the outer pipe 4 is abutted against the bottom of the second annular step; the outer side of the first annular step is in sealing contact with the inner side of the second annular step, the lower end of the second annular step and the lower end of the inner pipe hanger 1201 form an annular gap communicated with the inner cavity of the outer pipe 4, and the air inlet joint 13 is arranged on the second annular step and communicated with the annular gap; the inner tubing hanger 1201 is secured to the outer tubing joint 1202 by using a plurality of stop pins 1203. The plugging piece 12 is convenient for the lower end of the inner tube 3 to be connected with the upper end of the inner tube short section 2 in the arrangement, and simultaneously plugs the annular space between the upper end of the outer tube 4 and the inner tube short section 2. A stop pin 1203 is provided to fixedly fit the outer fitting 1202 over the inner tubing hanger 1201. Further, the middle plugging piece 12 further comprises a plurality of second O-shaped rubber sealing rings arranged between the first annular step and the second annular step, wherein a plurality of grooves matched with the second O-shaped rubber sealing rings are arranged on the outer wall of the first annular step along the circumferential direction, and the second O-shaped rubber sealing rings are located between the grooves and the inner side of the second annular step to seal an annular gap between the outer side of the first annular step and the inner side of the second annular step. Specifically, the device provided by the embodiment of the present invention further includes a gasket disposed between the air inlet joint 13 and the outer pipe joint 1202 to seal an annular gap between the air inlet joint 13 and the outer pipe joint 1202 to prevent air leakage.
Specifically, the inner pipe hanger 1201 is fixedly sleeved on the lower end of the inner pipe 3 and the upper end of the inner pipe nipple 2, and the lower end of the outer pipe joint 1202 is fixedly sleeved on the upper end of the outer pipe 4, wherein the mode of "fixing and sleeving" is various, for example, sleeving in a threaded connection mode, sleeving in a clamping mode, preferably sleeving in a threaded connection mode, and the threaded connection mode is easy to set, and is convenient to disassemble and assemble.
Specifically, in the embodiment of the present invention, as shown in fig. 2 to 3, the upper plug 14 includes an inner tube upper connector 1401, an upper insulating plug 1402, and a gland 1403 sleeved on the upper end of the inner tube upper connector 1401; the inner cavity of the inner pipe upper joint 1401 is sequentially provided with a first large-diameter cylindrical inner cavity, a medium-diameter cylindrical inner cavity, a small-diameter cylindrical inner cavity and a second large-diameter cylindrical inner cavity from top to bottom; the upper insulating plug 1402 includes an insulating large cylindrical end disposed in the first large-diameter cylindrical inner cavity and an insulating small cylindrical end disposed at the upper portion of the medium-diameter cylindrical inner cavity; the second elastic fixing member 16 includes an upper tube insulating ring 1601 and an upper spring 1602; the upper part of the upper electric connection tube insulating ring 1601 is fixed at the bottom of the inner cavity of the middle-diameter cylinder, and the lower part is sealed and sleeved in the inner cavity of the small-diameter cylinder; the upper connecting tube 17 comprises a large cylindrical end which is axially slidably arranged in the inner cavity of the middle-diameter cylinder and a small cylindrical end which is axially slidably arranged in the inner cavity of the small-diameter cylinder, and the lower end of the small cylindrical end is positioned in the inner cavity of the second large-diameter cylinder; the upper end of the upper spring 1602 is sleeved on the small insulating cylindrical end, the upper end of the upper spring abuts against the bottom of the large insulating cylindrical end, and the lower end of the upper spring abuts against the bottom surface of an inner hole of the large cylindrical end of the upper electric connecting pipe; the lower end of the large insulating cylindrical end is provided with two second conducting rings 15 which are used for being communicated with the upper end of the large cylindrical end of an upper connecting tube 17; the air outlet joint 18 is communicated with the inner cavity of the medium-diameter cylinder. When the plunger 8 hits the small cylindrical end of the upper electric connecting pipe 17, the upper electric connecting pipe 17 moves upward and is connected with the two second conducting rings 15 at the lower end of the large insulating cylindrical end of the upper insulating plug 1402, and when the air supply to the device is stopped, the plunger 8 moves downward, the upper electric connecting pipe 17 moves downward due to the gravity and the elastic restoring force of the upper spring 1602, the upper electric connecting pipe 17 is disconnected from the two second conducting rings 15, and the air is output from the inner cavity of the upper electric connecting pipe 17 to the inner cavity of the medium-diameter cylinder and is output from the air outlet joint 18. The upper outer diameter of the upper connecting tube insulating ring 1601 is larger than the lower outer diameter so as to be fixed at the bottom of the inner cavity of the middle-diameter cylinder, and the lower sealing sleeve is arranged in the inner cavity of the small-diameter cylinder so as to avoid the conduction between the upper connecting tube 17 and the inner tube upper connector 1401. At least one gas outlet hole can be formed in the side wall of the large cylindrical end of the upper connecting pipe 17, so that gas can be conveniently input into the annular space between the upper connecting pipe 17 and the inner pipe upper connector 1401 through the upper connecting pipe 17 and then output through the gas outlet connector 18. The air outlet joint 18 is arranged, so that the plunger 8 does not hold pressure when moving upwards and moves smoothly. The device provided by the embodiment of the invention also comprises a sealing gasket arranged between the air outlet joint 18 and the inner pipe upper joint 1401 so as to seal a connecting thread gap between the air inlet joint 13 and the inner pipe upper joint 1401 and prevent air leakage.
Specifically, as shown in fig. 2 to 3, the device provided by the embodiment of the present invention further includes two third terminals 24 disposed on the end of the large insulating cylinder and two second terminal glands 25 for respectively fixing the two third terminals 24; the two second conductive rings 15 are respectively connected with the two third binding posts 24 and electrically connected with the timing electric cabinet 19 through wires. The third binding posts 24 are arranged to be conveniently connected with the second conductive rings 15, and then the third binding posts 24 are electrically connected with the timing electric cabinet 19 through wires, wherein two third binding posts 24 are respectively connected with the two second conductive rings 15 in a welding manner. Set up two second terminal glands 25 to fix third terminal 24 in last insulating plug 1402, in order to prevent that third terminal 24 from exposing in last insulating plug 1402, wherein, two second terminal glands 25 all include big cylinder end and small circle post end, and big cylinder end offsets with the upper end of last insulating plug big cylinder end, and the small circle post end penetrates the through-hole that sets up on the last insulating plug big cylinder end and compresses tightly third terminal 24.
Specifically, as shown in fig. 1, the apparatus according to the embodiment of the present invention further includes an inner tube upper collar 26 and a pressure gauge 27, the inner tube upper collar 26 is sleeved on the upper end of the inner tube 3 and the lower end of the inner tube upper collar 1401 in a threaded connection manner, an inner threaded hole communicated with the inner cavity of the inner tube 3 is provided on the sidewall of the inner tube upper collar 26, and the threaded joint of the pressure gauge 27 is in threaded connection with the inner threaded hole. The inner pipe upper coupling 26 is arranged to connect the upper end of the inner pipe 3 with the lower end of the inner pipe upper joint 1401 conveniently, the pressure gauge 27 is arranged to measure the pressure of the gas in the inner pipe nipple 2 and the inner pipe 3 conveniently, and therefore the gas thrust and the friction resistance born by the plunger 8 can be obtained conveniently in the later period according to the measured running time, distance and gas pressure of the plunger 8.
Specifically, in the embodiment of the present invention, as shown in fig. 3, the timing electric control box 19 includes a first intermediate relay, a second intermediate relay, a first time relay, a second time relay, a first resistor R1, a second resistor R2, a third resistor R3, and a power supply E; one first conductive ring 11 is connected with one end of a power supply E through a lead, the other first conductive ring 11 is connected with a coil KA1M, a second resistor R2 and a first resistor R1 of the first intermediate relay in series through leads, and a coil KT1M of the first time relay is connected with a coil KA1M of the first intermediate relay in parallel; one second conductive ring 15 is connected with one end of a power supply E through a lead, the other second conductive ring 15 is connected with a coil KA2M and a third resistor R3 of the second intermediate relay in series through leads and then connected with the first conductive ring 11, a coil KA1M and a second resistor R2 which are connected in series, and a coil KT2M of the second time relay is connected with a coil KA2M of the second intermediate relay in parallel; the normally open contact KA1D of the first intermediate relay is connected with the normally closed contact KT1D of the first time relay in series, then is connected with the normally open contact KA2D of the second intermediate relay and the normally closed contact KT2D of the second time relay in series in parallel, and then is electrically connected with the internal circuit of the electronic stopwatch 20 through a lead.
The normally open contact KA1D of the first intermediate relay and the normally closed contact KT1D of the first time relay are electrically connected with the timing switch of the electronic stopwatch 20 through leads; the normally open contact KA2D of the second intermediate relay and the normally closed contact KT2D of the second time relay are electrically connected with the timing switch of the electronic stopwatch 20 through leads so as to control the start or stop of the timing of the electronic stopwatch 20.
When two first conducting rings 11 and lower conducting ring 9 switch on, the electric current passes through coil KA1M of first intermediate relay and coil KT1M of first time relay, because the effect of electromagnetic force, normally open contact KA1D of first intermediate relay is closed, the electric current passes through normally closed contact KT1D of first time relay this moment, normally open contact KA1D of first intermediate relay, and switch on for the first time with electron stopwatch 20 time switch, then because the effect of electromagnetic force, normally closed contact KT1D of first time relay breaks off after the scheduled time, no electric current intercommunication among the relevant control circuit of electron stopwatch 20, electron stopwatch 20 obtains a pulse signal that begins the timing this moment. When the two second conductive rings 15 are connected with the upper connecting tube 17, the current passes through the coil KA2M of the second intermediate relay and the coil KT2M of the second time relay, due to the action of electromagnetic force, the normally open contact KA2D of the second intermediate relay is closed, at this time, the current passes through the normally closed contact KT2D of the second time relay, the normally open contact KA2D of the second intermediate relay and is conducted with the timing switch of the electronic stopwatch 20 again, then due to the action of electromagnetic force, the normally closed contact KT2D of the second time relay is disconnected after a preset time, no current is communicated in the related control circuit of the electronic stopwatch 20, and at this time, the electronic stopwatch 20 obtains a pulse signal for stopping timing. The time between two pulse signals is the time for the plunger 8 to travel from the plunger holder 7 to the top wall of the second large-diameter cylindrical inner cavity of the inner tube upper connector 1401.
Wherein the first time the time switch is turned on is understood to mean that the time button of the electronic stopwatch 20 is pressed for the first time to generate a pulse for the electronic stopwatch 20, and the second time the time switch is turned on is understood to mean that the time button of the electronic stopwatch 20 is pressed for the second time to generate a pulse for the electronic stopwatch 20, and the time between the two pulses is the running time of the plunger 8.
It should be noted that the normally closed contact KT1D of the first time relay and the normally closed contact KT2D of the second time relay are normally closed delay contacts, when the coil is not energized, the normally closed contacts are in a closed state, after the coil is energized with current, the normally closed contacts are energized with current, and then the normally closed contacts are opened after a predetermined time is delayed to open the circuit. The normally open contact KA1D of the first intermediate relay and the normally open contact KA2D of the second intermediate relay are in an off state when no current is supplied, and after the normally open contacts are closed under the action of electromagnetic force, corresponding loops are connected. The first time relay, the second time relay, the first intermediate relay and the second intermediate relay are all relays commonly used in the field, and in order to highlight the connection relation required to be protected in the invention, the connection relation between the contact of the corresponding relay and the coil, which is known in the field, is not shown by lines.
In a second aspect, an embodiment of the present invention further provides a method for testing the running time of a plunger by using the above apparatus, where the method includes:
the gas enters an annular space between the outer pipe 4 and the inner pipe short section 2 through the gas inlet joint 13 and the gas lift valve working barrel 1, the gas lift valve 6 is opened along with the increase of the gas pressure, the gas enters the gas lift valve working barrel 1, along with the increase of the gas pressure in the gas lift valve working barrel 1, the gas upwards pushes the plunger 8 on the plunger support 7 to upwards move through the through hole of the plunger support 7, after the plunger 8 leaves the plunger support 7, the plunger support 7 is pushed to upwards move due to the elastic recovery of the lower spring 1004, the plunger support 7 drives the lower power connection ring 9 to be communicated with the two first power connection rings 11, the timing electric control box 19 receives and processes a timing signal, then a timing control instruction is sent to the electronic stopwatch 20, and the electronic stopwatch 20 starts to time. The plunger 8 moves upwards to the upper plugging piece 14 to abut against the upper connecting pipe 17, the upper connecting pipe 17 moves upwards and is communicated with the two second conducting rings 15, the timing electric control box 19 receives and processes the stop timing signal, then a control instruction for stopping timing is sent to the electronic stopwatch 20, and the electronic stopwatch 20 starts to stop timing. Meanwhile, the gas entering the gas lift valve working barrel 1 sequentially enters the inner pipe nipple 2 and the inner pipe 3 through the gas lift valve working barrel 1 and is output through the gas outlet connector 18.
By the method, the time for the plunger 8 to move upwards from the plunger support 7 to the top wall of the inner cavity of the second large-diameter cylinder of the inner pipe upper joint 1401 can be obtained, then the stress condition of the plunger 8 in the operation process can be analyzed by combining the operation distance of the plunger 8, and the plungers 8 with different structures or types matched with the oil pipes of corresponding oil wells are selected for gas lift oil extraction, so that the gas lift oil extraction efficiency is improved, and the self-injection production of the oil wells is maintained.
Then, by stopping the supply of air into the apparatus, the plunger 8 is seated back on the plunger holder 7 by gravity, and the upper contact tube 17 is seated back by its own weight and the elastic force of the upper spring 1602, and is disconnected from the two second conductive rings 15. At the same time, the gravity of the plunger 8 compresses the lower spring 1004 to make it contract, and the plunger holder 7 carries the lower conductive ring 9 to move downwards, disconnecting from the two first conductive rings 11. At the moment, the normally open or normally closed contacts of all the intermediate relays and the time relays are restored to the original states.
The time for the plunger 8 to move upwards from the plunger holder 7 to the top wall of the fourth cylindrical inner cavity of the inner pipe upper connector 1401, which is obtained according to the method, is matched with the running distance of the plunger 8, so that the gas thrust and the frictional resistance of the plunger 8 can be obtained, and the plunger 8 which is suitable for the oil pipe of a specified oil well is selected. The calculation formulas of the gas thrust and the frictional resistance of the plunger 8 are as follows:
Figure BDA0001193318550000171
Figure BDA0001193318550000172
wherein F is gas thrust and the unit is N; d is the outer diameter of the plunger 8 in m; p is the pressure of the gas in the inner pipe 3 and the inner pipe nipple 2, namely the reading of a pressure gauge 27, and the unit is Pa; f is the frictional resistance borne by the plunger 8, and the unit is N; m is the mass of the plunger 8 in kg; g is the acceleration of gravity in m/s2(ii) a s is the travel distance of the plunger 8 in m; t is the operating time of the plunger 8 in s.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A gas lift oil production plunger operation time testing device comprises a gas lift valve working cylinder (1), an inner pipe short section (2), an inner pipe (3) and an outer pipe (4), a lower plugging piece (5), a gas lift valve (6), a plunger support (7), a middle plugging piece (12) and an upper plugging piece (14), wherein the gas lift valve working cylinder (1) and the inner pipe short section (2) are sequentially communicated from bottom to top;
the lower plugging piece (5) is used for plugging the lower end of the outer pipe (4) and the lower end of the gas lift valve working barrel (1);
the gas lift valve (6) is arranged on the outer wall of the gas lift valve working cylinder (1), and an air outlet is communicated with the inner cavity of the gas lift valve working cylinder (1);
the plunger support (7) is provided with a through hole along the axial direction, and the upper end of the plunger support is used for seating the plunger (8);
the middle plugging piece (12) is used for plugging the upper end of the outer pipe (4) and connecting the upper end of the inner pipe nipple (2) with the lower end of the inner pipe (3), and an air inlet joint (13) communicated with the annular space is arranged on the middle plugging piece (12);
the upper blocking piece (14) is used for blocking the upper end of the inner tube (3), and is characterized in that,
a lower electric ring (9) is arranged at the lower end of the plunger support (7), a first elastic fixing piece (10) arranged in an inner cavity at the joint of the gas lift valve working cylinder (1) and the inner pipe short section (2) penetrates through the lower end of the plunger support in a clearance fit mode, and two first electric conducting rings (11) used for being communicated with the lower electric ring (9) are arranged at the lower end of the first elastic fixing piece (10);
the upper plugging piece (14) is provided with an inner cavity which is axially communicated, two second conducting rings (15) are arranged on the upper plugging piece (14), a second elastic fixing piece (16) is arranged in the inner cavity, and an upper power connection pipe (17) slides up and down along the second elastic fixing piece (16) in a clearance fit manner and is used for being communicated with the second conducting rings (15); an air outlet joint (18) communicated with the inner cavity is arranged on the upper plugging piece (14);
the device further comprises:
the timing electric cabinet (19) is electrically connected with the two first conductive rings (11) and the two second conductive rings (15) through wires respectively;
the electronic stopwatch (20) is electrically connected with the timing electric control box (19) through two leads;
when the first conductive ring (11) and the lower conductive ring (9) are switched on, the timing electric control box (19) receives a timing starting signal and then sends a timing starting control instruction to the electronic stopwatch (20);
when the second conductive ring (15) and the upper connecting tube (17) are connected, the timing electric control box (19) receives a timing stopping signal and then sends a timing stopping control instruction to the electronic stopwatch (20).
2. The device according to claim 1, characterized in that the lower closure (5) comprises an outer tubular bottom plug (501), a lower insulating plug (502), an outer tubular collar (503);
the upper end of the outer tube bottom plug (501) is axially provided with a blind hole, the lower end of the gas lift valve working cylinder (1) is placed in the blind hole, and the bottom of the outer tube bottom plug (501) is provided with two first binding posts (21);
the lower insulating plug (502) seals and blocks the lower end of the gas lift valve working barrel (1) in a sealing manner, two second wiring terminals (22) electrically connected with the first wiring terminals (21) are further arranged on the lower insulating plug (502), the two first conducting rings (11) are respectively connected with two conducting wires and are respectively and sequentially and electrically connected with the two second wiring terminals (22), the two first wiring terminals (21) and the timing electric cabinet (19) through the conducting wires;
the outer pipe coupling (503) is fixedly sleeved at the upper end of the outer pipe bottom plug (501) and the lower end of the outer pipe (4).
3. The device according to claim 2, characterized in that the lower closure (5) further comprises at least one first O-ring rubber seal for sealing an annular gap between the lower insulating plug (502) and the gas lift valve mandrel (1).
4. The device according to claim 1, characterized in that the plunger holder (7) comprises a plunger holder head and a cylindrical holder body which are sequentially connected and communicated from top to bottom;
the first elastic fixing piece (10) comprises a clamping ring (1001), an insulating ring pressing ring (1002), an insulating ring (1003), a lower spring (1004) and an inner pipe lower collar (1005);
the outer wall of the clamping ring (1001) abuts against the inner wall of the inner pipe nipple (2), and the lower end of the clamping ring abuts against the upper end of the gas lift valve working barrel (1);
the insulating ring pressing ring (1002) is sleeved in the clamping ring (1001);
the insulating ring (1003) is sleeved inside the lower end of the clamping ring (1001), the upper end of the insulating ring abuts against the lower end of the insulating ring pressing ring (1002), and meanwhile, the cylindrical support body penetrates through the insulating ring (1003) in a clearance fit mode;
the lower power ring (9) is sleeved on the cylindrical support body and extends out of the lower end of the insulating ring (1003), and the two first conductive rings (11) are arranged at the lower end of the insulating ring (1003);
the lower spring (1004) is sleeved on the cylindrical support body and is in a compressed state, and is positioned between the plunger support head and the insulating ring (1003);
the inner pipe lower collar (1005) is fixedly sleeved on the upper end of the gas lift valve working barrel (1) and the lower end of the inner pipe nipple (2).
5. The device according to claim 1, characterized in that the central closure (12) comprises an inner tubing hanger (1201), an outer tubing fitting (1202), a plurality of stop pins (1203);
the inner pipe hanger (1201) is of a cylindrical structure, the outer diameters of the upper end and the lower end of the inner pipe hanger are smaller than that of the middle part of the inner pipe hanger, so that a first annular step is formed on the outer wall of the inner pipe hanger, and the inner pipe hanger (1201) is fixedly sleeved at the lower end of the inner pipe (3) and the upper end of the inner pipe nipple (2);
the inner diameters of the upper end and the lower end of the inner wall of the outer pipe joint (1202) are larger than that of the middle part, so that a second annular step is formed on the inner wall, the lower end of the outer pipe joint (1202) is fixedly sleeved at the upper end of the outer pipe (4), and the upper end of the outer pipe (4) is abutted against the bottom of the second annular step;
the outer side of the first annular step is in sealing contact with the inner side of the second annular step, the lower end of the second annular step and the lower end of the inner pipe hanger (1201) form an annular gap communicated with the inner cavity of the outer pipe (4), and the air inlet joint (13) is arranged on the second annular step and communicated with the annular gap;
securing the inner tubing hanger (1201) with the outer tubing joint (1202) by using a plurality of stop pins (1203).
6. The device according to claim 1, characterized in that the upper closure (14) comprises an inner tube upper fitting (1401), an upper insulating plug (1402), and a gland (1403) fitted around the upper end of the inner tube upper fitting (1401);
the inner cavity of the inner pipe upper joint (1401) is sequentially provided with a first large-diameter cylindrical inner cavity, a medium-diameter cylindrical inner cavity, a small-diameter cylindrical inner cavity and a second large-diameter cylindrical inner cavity from top to bottom;
the upper insulating plug (1402) comprises an insulating large cylindrical end arranged in the first large-diameter cylindrical inner cavity and an insulating small cylindrical end arranged at the upper part of the medium-diameter cylindrical inner cavity;
the second elastic fixing piece (16) comprises an upper connecting pipe insulating ring (1601) and an upper spring (1602);
the upper part of the upper connecting tube insulating ring (1601) is fixed at the bottom of the inner cavity of the medium-diameter cylinder, and the lower part of the upper connecting tube insulating ring is sleeved in the inner cavity of the small-diameter cylinder in a sealing manner;
the upper power receiving tube (17) comprises a large cylindrical end axially slidably arranged in the middle-diameter cylindrical inner cavity and a small cylindrical end axially slidably arranged in the small-diameter cylindrical inner cavity, and the lower end of the small cylindrical end is positioned in the second large-diameter cylindrical inner cavity;
the upper end of the upper spring (1602) is sleeved on the small insulating cylindrical end, the upper end of the upper spring is abutted against the bottom of the large insulating cylindrical end, and the lower end of the upper spring is abutted against the bottom of the inner cavity of the large insulating cylindrical end;
the lower end of the large insulating cylindrical end is provided with two second conducting rings (15) which are used for being communicated with the upper end of the large cylindrical end of the upper connecting tube (17);
the air outlet joint (18) is communicated with the inner cavity of the medium-diameter cylinder.
7. The device according to claim 6, characterized in that it further comprises two third terminals (24) arranged on the end of the insulating large cylinder and two second terminal glands (25) respectively fixing the two third terminals (24);
the two second conducting rings (15) are respectively connected with the two third binding posts (24) and are electrically connected with the timing electric control box (19) through conducting wires.
8. The device according to claim 6, characterized in that the device further comprises an inner pipe upper coupling (26) and a pressure gauge (27), wherein the inner pipe upper coupling (26) is sleeved on the upper end of the inner pipe (3) and the lower end of the inner pipe upper coupling (1401) in a threaded connection mode, an inner threaded hole communicated with the inner cavity of the inner pipe (3) is formed in the side wall of the inner pipe upper coupling (26), and the threaded coupling of the pressure gauge (27) is in threaded connection with the inner threaded hole.
9. The device according to claim 1, characterized in that the timing electric cabinet (19) comprises a first intermediate relay, a second intermediate relay, a first time relay, a second time relay, a first resistor (R1), a second resistor (R2), a third resistor (R3), a power source (E);
one of the first conductive rings (11) is connected with one end of the power source (E) through a wire, the other one of the first conductive rings (11) is connected with the coil (KA1M), the second resistor (R2) and the first resistor (R1) of the first intermediate relay in series through wires, and the coil (KT1M) of the first time relay is connected with the coil (KA1M) of the first intermediate relay in parallel;
one of the second conductive rings (15) is connected to one end of the power source (E) by a wire, and the other second conductive ring (15) is connected in series to the coil (KA2M) of the second relay, the third resistor (R3) by a wire, and then connected in parallel to the first conductive ring (11) connected in series, the coil (KA1M) of the first relay, the second resistor (R2), and the coil (KT2M) of the second time relay and the coil (KA2M) of the second relay;
normally open contact (KA1D) of first auxiliary relay with normally closed contact (KT1D) of first time relay establish ties, then with the series connection normally open contact (KA2D) of second auxiliary relay, normally closed contact (KT2D) of second time relay are parallelly connected, then through the wire with the internal circuit electricity of electron stopwatch (20) is connected.
10. A method of testing the running time of a plunger by the apparatus of any one of claims 1 to 9, the method comprising:
gas enters an annular space between an outer pipe (4) and an inner pipe short section (2) and a gas lift valve working barrel (1) through a gas inlet joint (13), a gas lift valve (6) is opened along with the increase of air pressure, the gas enters the gas lift valve working barrel (1), along with the increase of the air pressure in the gas lift valve working barrel (1), the gas is upwards pushed through a through hole of a plunger support (7), a plunger (8) on the plunger support (7) moves upwards, and the plunger (8) leaves behind the plunger support (7), the plunger holder (7) is pushed to move upwards due to the elastic recovery of the lower spring (1004), the plunger support (7) drives the lower power ring (9) to be communicated with the two first conductive rings (11), the timing electric control box (19) receives and processes a timing starting signal, then, sending a control instruction for starting timing to the electronic stopwatch (20), wherein the electronic stopwatch (20) starts timing;
the plunger (8) moves upwards to the upper plugging piece (14) to abut against an upper electric connecting pipe (17), the upper electric connecting pipe (17) moves upwards and is communicated with two second conductive rings (15), the timing electric control box (19) receives and processes a timing stopping signal, then a timing stopping control command is sent to the electronic stopwatch (20), and the electronic stopwatch (20) stops timing;
meanwhile, gas entering the gas lift valve working barrel (1) sequentially enters the inner pipe short section (2) and the inner pipe (3) through the gas lift valve working barrel (1) and is output through the gas outlet joint (18).
CN201611224456.1A 2016-12-27 2016-12-27 Gas lift oil extraction plunger operation time testing device and method Active CN108240216B (en)

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CN113163923A (en) * 2018-09-16 2021-07-23 伊夫瑞士股份公司 Container for cosmetics and other products with limited time of use or for time-controlled product display with integrated clock, electronics and timer functions
CN110344818B (en) * 2019-07-18 2023-04-11 滨州学院 Liquid slug interface tracking method for plunger up-going stage of plunger gas lift well
CN113593834B (en) * 2021-06-29 2023-02-07 南通大学 Intelligent oil-immersed transformer oil supplementing method
CN114382448A (en) * 2022-01-24 2022-04-22 宝鸡文理学院 Oil and gas downhole turbine power-assisted gas lift plunger drainage and gas production device

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