CN109915130B - Oil testing device and method - Google Patents
Oil testing device and method Download PDFInfo
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- CN109915130B CN109915130B CN201711282801.1A CN201711282801A CN109915130B CN 109915130 B CN109915130 B CN 109915130B CN 201711282801 A CN201711282801 A CN 201711282801A CN 109915130 B CN109915130 B CN 109915130B
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Abstract
The invention discloses an oil testing device and method, and belongs to the field of oilfield development. This oil testing device includes: test oil tubular column, throttling element, impact rod. The oil testing tubular column includes: the device comprises a positioning short section, a throttle valve, a pressure gauge supporting cylinder, a packer, a negative pressure tapping component, a rod throwing initiator and a perforating gun arranged at the lower end of the rod throwing initiator, wherein the positioning short section, the throttle valve, the pressure gauge supporting cylinder, the packer, the negative pressure tapping component, the rod throwing initiator and the perforating gun are sequentially communicated from top to bottom through a plurality of oil pipes. The throttling piece is used for being thrown into the throttling valve to throttle a sample produced by the testing layer flowing through the throttling valve. The percussion rod is used for striking the throwing rod initiator after penetrating through the negative pressure perforating assembly, so that the throwing rod initiator ignites the perforating gun. The negative pressure tapping assembly is communicated with the test layer after being impacted by the impacting rod. According to the invention, the difference value between the pressure value of the shaft and the pressure value of the stratum can be always in the preset range without adding a liquid pad into the test oil pipe column, so that the cost and the labor intensity of workers are reduced, and the mixing of the test layer output samples and the liquid pad during the upward discharging is avoided.
Description
Technical Field
The invention relates to the field of oilfield development, in particular to an oil testing device and method.
Background
In the exploration and development process of the oil field, in order to obtain the data of the properties of formation fluid, the yield of various fluids, the formation pressure and the like, and obtain various physical parameters of the formation through the analysis and the processing of the data so as to evaluate the formation and provide reliable basis for the development of the oil field, the oil testing operation is required to be carried out before the production operation of the oil field.
In the prior art, when oil testing operation is carried out, an oil pipe is used for putting an oil testing device (comprising a test valve, a pressure transmission valve, a sieve pipe and the like) into a shaft, and in the process, a liquid cushion (generally water) is continuously added into the oil pipe to change the pressure of the shaft, so that the difference value between the pressure value of the shaft and the pressure value of a stratum is always in a preset range, and the stratum is prevented from being damaged. After the oil testing device is lowered to a position to be tested (corresponding to a testing layer) in the shaft, a testing valve in the oil testing device is opened through ground control, so that a sample produced by the testing layer enters the oil pipe through the sieve pipe and the testing valve and is discharged to the ground together with a liquid cushion in the oil pipe. At this moment, the data such as the property, the yield and the formation pressure of the produced sample of the test layer can be obtained, and various physical parameters of the formation can be obtained through the analysis and the processing of the data, so that the formation can be evaluated, and the oil testing operation can be completed.
The inventor finds that the prior art has at least the following problems:
in the prior art, a liquid cushion needs to be added into an oil pipe in the process of oil testing operation, so that the cost and the labor intensity of workers can be increased, and the liquid cushion can be mixed when a test layer output sample is discharged upwards, so that the determination of the parameters of the test layer output sample is influenced.
Disclosure of Invention
The embodiment of the invention provides an oil testing device and method, which can solve the technical problem. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides an oil testing device, where the device includes: a test oil pipe column, a throttling piece and an impact rod;
the test oil pipe column comprises: the positioning short section, the throttle valve, the pressure gauge supporting barrel, the packer, the negative pressure tapping component and the rod throwing exploder are sequentially communicated from top to bottom through a plurality of oil pipes;
the perforating gun is arranged at the lower end of the throwing rod initiator;
the throttling piece is used for being thrown into the throttling valve to throttle a sample produced by the test layer flowing through the throttling valve;
the percussion rod is used for striking the shooting rod initiator after penetrating through the negative pressure perforating assembly, so that the shooting rod initiator ignites the perforating gun;
and the negative pressure hole opening assembly is communicated with the test layer after being impacted by the impact rod.
In one possible design, the throttling element is provided with a longitudinal throttling hole, and the side wall of the throttling element is provided with an elastic lug;
a clamping groove matched with the elastic lug is arranged in the throttle valve;
the elastic lug is matched with the clamping groove and used for enabling the throttling piece to be clamped with the throttling valve.
In one possible design, the test string further comprises: and the shock absorber is connected with the upper end of the negative pressure hole opening assembly through the oil pipe.
In one possible design, the negative pressure vent assembly includes: a housing and a sliding sleeve;
a first liquid passing hole is formed in the side wall of the lower portion of the shell, and an inner annular bump and an inner annular limiting step are respectively arranged on the inner wall of the shell above and below the first liquid passing hole;
the sliding sleeve is fixed on the shell through a first shearing pin; an outer annular lug is arranged on the outer wall of the sliding sleeve, and the inner annular lug and the outer annular lug are respectively in sealing contact with the sliding sleeve and the shell;
the outer annular bump is positioned above the inner annular bump, a second liquid passing hole is formed in the side wall of the sliding sleeve between the inner annular bump and the inner annular bump, and the second liquid passing hole is sealed through a second shearing pin;
and a third liquid passing hole is formed in the side wall of the lower part of the sliding sleeve, after the first shearing pin and the second shearing pin are sheared off, the sliding sleeve moves downwards to abut against the inner annular limiting step, so that the first liquid passing hole is opposite to the third liquid passing hole.
In one possible design, the test string further comprises: and the reverse circulation valve is connected with the lower end of the positioning short section through the oil pipe.
In one possible design, the positioning nipple, the throttle valve, the pressure gauge support cylinder, the packer, the negative pressure tapping assembly, the rod throwing initiator, the shock absorber, and the reverse circulation valve are all in threaded connection with the tubing.
In one possible design, the packer is an RTTS packer.
In a second aspect, an embodiment of the present invention provides a method for performing a test run operation by using the above apparatus, where the method includes:
putting a test oil pipe column into a shaft, positioning a position to be tested through a positioning short section, setting a packer at the position to be tested, putting a striking rod into the test oil pipe column, so that the striking rod strikes and penetrates through a negative pressure tapping assembly, and the negative pressure tapping assembly is communicated with a test layer after being struck by the striking rod;
the percussion rod strikes a shooting bar initiator after penetrating through the negative pressure perforating assembly, a shooting gun is ignited by the shooting bar initiator so that the shooting gun perforates the test layer, and in the process, a throttling element is thrown into a throttling valve so as to throttle a sample produced by the test layer flowing through the throttling valve;
after the perforation gun finishes perforation, the test layer output sample enters the oil testing pipe column through the negative pressure perforating assembly and is discharged to the ground along the oil testing pipe column to obtain the test layer output sample, and in the process, the underground pressure is obtained through the pressure gauge supporting cylinder to finish oil testing operation.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the oil testing device provided by the embodiment of the invention, the throttling piece is arranged and put into the throttling valve in the oil testing operation process, the test layer sample flowing through the throttling valve is throttled, and the difference value between the pressure value of the shaft and the formation pressure value is always in the preset range without adding a liquid pad into the oil testing pipe column, so that the cost and the labor intensity of workers are reduced, the test layer output sample is prevented from being mixed with the liquid pad when being discharged upwards, and the parameters of the test layer output sample are convenient to determine subsequently. In addition, by putting the throttling element into the throttling valve, the impact force on the oil testing tubular column during perforating of the perforating gun can be reduced, and the stable running of oil testing operation is ensured. Through setting up negative pressure trompil subassembly, can realize the intercommunication on oil testing tubular column and test layer, guarantee going on smoothly of follow-up oil testing operation.
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 schematic structural diagram of an oil testing device provided in an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a negative pressure vent assembly provided by an embodiment of the present invention.
The reference numerals denote:
1, testing the oil pipe column,
101, positioning the short joint,
a throttle valve 102 is provided in the valve housing,
103 a pressure gauge supporting cylinder is arranged on the base,
104 of the packer(s) is set,
105 a negative pressure tapping component, wherein the negative pressure tapping component,
1051 a housing for the device, wherein the housing,
10511 a first fluid passing hole formed in the first substrate,
1052 the slide sleeve is arranged on the outer side of the sliding sleeve,
10521 a third liquid passing hole,
1053 an inner ring-shaped limit step,
1054 an annular projection within the interior of the body,
1055 the first shear pin of the first shear pin,
1056 an outer annular projection is provided,
1057 a second shear pin having a first end and a second end,
106 of a firing rod initiator, wherein the firing rod initiator is a hollow cylinder,
107 the perforating gun is set in the perforating gun,
108 the vibration absorber is arranged in the cavity of the shell,
109 is connected with a reverse circulation valve,
2 oil pipe.
Detailed Description
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.
In a first aspect, an embodiment of the present invention provides an oil testing device, as shown in fig. 1, the oil testing device includes: test oil tubular column 1, throttling element, impact bar. Wherein, test oil tubular column 1 includes: a positioning short joint 101, a throttle valve 102, a pressure gauge support barrel 103, a packer 104, a negative pressure perforating assembly 105, a rod-throwing initiator 106 and a perforating gun 107 arranged at the lower end of the rod-throwing initiator 106, which are sequentially communicated from top to bottom through a plurality of oil pipes 2. The flow restriction is adapted to be placed within the choke valve 102 to restrict flow of a test production sample through the choke valve 102. The striker rod is adapted to strike a firing bar initiator 106 after passing through a negative pressure vent assembly 105, causing firing bar initiator 106 to fire a perforating gun 107. The negative pressure vent assembly 105 communicates with the test layer after being impacted by the impact bar.
The working principle of the oil testing device provided by the embodiment of the invention is described as follows:
when the oil testing operation is needed, the oil testing pipe column 1 is put into the pretreated shaft, the position to be tested (corresponding to a testing layer) is positioned in the shaft through the positioning short section 101, and after the positioning is completed, the packer 104 is set at the testing position so as to fix the oil testing pipe column 1 in the shaft. Then, a percussion rod is put into the test string 1, and the percussion rod is made to strike and pass through the negative pressure tapping assembly 105, so that the time of the percussion rod striking the firing rod initiator 106 is delayed, and the negative pressure tapping assembly 105 is communicated with a test layer after being struck by the percussion rod.
The ballistic rod, after passing through underbalance perforation assembly 105, impacts a firing bar initiator 106, which fires perforating gun 107 through firing bar initiator 106, causing perforating gun 107 to perforate the test zone. In the process, a choke is dropped from the wellhead into the choke 102.
After the perforating gun 107 finishes perforating, a test layer output sample enters the test oil pipe column 1 through the negative pressure perforating assembly 105 and flows towards the ground, and when the test layer output sample flows through the throttling valve 102, the test layer output sample is throttled under the action of the throttling element, so that the difference value between the wellbore pressure value and the formation pressure value is always within a preset range. In the process, the downhole pressure is taken by the pressure gauge cartridge 103. It should be noted that the formation pressure is always constant, and therefore, in order to keep the difference between the wellbore pressure value and the formation pressure value within the preset range, only the specification of the throttling element needs to be adjusted according to the actual situation (i.e., the flow rate of the throttling element is changed), and an appropriate throttling element is put into the throttling valve 102, so as to change the wellbore pressure.
The perforating gun 107 can generate strong impact force on the test oil string 1 during perforating, and the larger the flow passage in the test oil string 1 is, the larger the impact force is, so that the larger the shaking amplitude of the test oil string 1 is. Therefore, by putting the throttling element into the throttling valve 102, the overflowing channel is reduced, the impact force can be reduced, the shaking amplitude of the oil testing pipe column 10 is reduced, and the stable oil testing operation is ensured.
And then, the oil testing pipe column 1 is taken out, the pressure data recorded by the pressure gauge support cylinder 103 is read, and subsequent analysis and evaluation are carried out according to the pressure data to finish the oil testing operation.
Based on the above, the oil testing device provided by the embodiment of the invention has the advantages that the throttling piece is arranged, the throttling piece is put into the throttling valve 102 in the oil testing operation process, the test layer sample flowing through the throttling valve 102 is throttled, and the difference value between the wellbore pressure value and the formation pressure value can be always in the preset range without adding a liquid pad into the oil testing tubular column 1, so that the cost and the labor intensity of workers are reduced, the test layer produced samples are prevented from being mixed with the liquid pad when being discharged upwards, and the parameters of the test layer produced samples can be conveniently determined subsequently. In addition, by putting the throttling element into the throttling valve 102, the impact force on the test string 1 when the perforating gun 107 perforates can be reduced, and the stable running of the test operation can be ensured. Through setting up negative pressure trompil subassembly 105, can realize the intercommunication of oil testing tubular column and test layer, guarantee going on smoothly of follow-up oil testing operation.
In the oil testing operation, in order to measure the pressure change in the oil testing string 1 without pulling up the oil testing string 1, a pressure gauge can be lowered into the oil testing string 1 through a steel wire. And after the pressure to be measured is finished, lifting the steel wire, and taking out the pressure gauge.
It should be noted that in the oil testing device provided by the embodiment of the present invention, the positioning nipple 101, the throttle valve 102, the pressure gauge support 103, the packer 104, the shot initiator 106, and the perforating gun 107 are all common oil testing tools in the art, and the following brief outlines are given for them respectively:
specifically, the locating sub 101 is a short casing used to accurately determine the depth of oil and gas layers during perforation, and is typically located near the top of the target test layer 30m above. A positioning sub 101 commonly used in the art is a gamma magnetic positioning sub, which is based on a magnetic positioning depth correction technology, and before perforation, a magnetic probe is put in, and a composite perforation depth correction technology of natural Gamma (GR) and a magnetic positioning (CCL) oil jacket is adopted to obtain perforation depth correction (for a specific principle, reference may be made to the application of a magnetic positioning curve and a gamma curve disclosed in petroleum instruments (vol 21, No. 3, 2007). Zhang Kaili et al in Petroleum instruments (12 months 2014) disclose a structure of a gamma magnetic positioning short joint. The locating sub 101 is also commercially available to those skilled in the art, and may be, for example, a magnetic locating sub sold by Tianjin Dalip petroleum tubing Co.
The throttle valve 102 is a valve that controls the flow of fluid by changing the throttle section or the throttle length. The construction is common in the art and is commercially available to those skilled in the art, for example, a throttle valve manufactured and sold by Hengda hydropneumatic Co.
The pressure gauge support cylinder 103 is important technical equipment in the technical field of well logging, and in the embodiment of the invention, the pressure gauge support cylinder 103 comprises a support cylinder body and a pressure gauge built in the support cylinder body, wherein the pressure gauge has a memory function and can measure and memorize downhole pressure in different time periods, so that the downhole pressure can be read as required after the pressure gauge support cylinder is lifted out of a well. Specifically, two pressure gauges can be installed in the support cylinder body of the pressure gauge support cylinder, and the internal pressure and the external pressure of the test oil pipe column 1 are respectively measured. When the formation testing operation is finished and the test oil pipe column 1 is started, the pressure data on the pressure gauge can be read according to the operation time period, and then the pressure change in different time periods can be seen to draw a pressure curve. Such a pressure gauge cartridge 103 is commercially available to those skilled in the art, for example, a pressure gauge cartridge specially equipped with a direct reading pressure gauge, model number TT110/45Z2SA, sold by daqing sainshi electronic instruments ltd.
The throwing stick initiator 106 and the perforating gun 107 are common perforating tools, wherein a closed firing head is arranged in the throwing stick initiator 106 to drive the perforating gun 107 to perform perforating operation, and the structure of the throwing stick initiator 106 can be referred to an oil pipe transmission multi-stage throwing stick initiation technology and application disclosed in Xinjiang petroleum technology (2013, 02), and the embodiment of the invention is not described more. Further, as for the perforating gun 107, those skilled in the art can obtain it commercially, and for example, it may be the perforating gun 107 sold by Ningyang Metal products, Inc. of Fuchu.
In the embodiment of the invention, the throttling element is provided with a longitudinal throttling hole, and the side wall is provided with an elastic lug. A clamping groove matched with the elastic bump is arranged in the throttle valve 102. The resilient projection cooperates with the slot for engaging the throttle member with the throttle valve 102.
When the throttling element is lowered, the throttling element is clamped into the clamping groove of the throttling valve 102 through the elastic lug under the action of the gravity of the throttling element, and clamping is completed. When the throttling element needs to be fished out, the throttling element only needs to be directly fished out by using a fishing tool. It can be understood that the throttling piece can be fished out only if the fishing tool is used for fishing with enough force because the elastic lug is of an elastic structure.
In view of the above, after the perforating gun 107 completes perforation, the test string 1 may shake due to the impact force. Therefore, the throttling piece is clamped with the throttling valve 102 after entering the throttling valve 102, after the oil testing pipe column 1 stops shaking, the throttling piece can be fished out of the throttling valve 102, throttling of the overflowing channel in the oil testing pipe column 1 is stopped, and the yield of samples produced by a test layer is effectively improved.
In order to reduce the instant high pressure and strong vibration generated when the perforating gun 107 is detonated, the test string 1 is prevented from being damaged. As shown in fig. 1, the test oil string 1 further includes: a shock absorber 108. The damper 108 is connected to the upper end of the negative pressure orifice assembly 105 through the oil pipe 2.
Among them, the shock absorber 108 is a common shock absorber in the art and is commercially available to those skilled in the art, and may be, for example, an SJ type bi-directional shock absorber manufactured and sold by coal mining materials group limited in shandong.
In an embodiment of the present invention, as shown in FIG. 2, the negative pressure vent assembly 105 includes: a housing 1051 and a slide sleeve 1052. Wherein, a first liquid passing hole 10511 is arranged on the side wall of the lower part of the shell 1051, and an inner annular convex block 1054 and an inner annular limiting step 1053 are respectively arranged on the inner wall of the shell 1051 above and below the first liquid passing hole 10511. The sliding sleeve 1052 is secured to the housing 1051 by a first shear pin 1055; and an outer annular bump 1056 is provided on the outer wall of the slide sleeve 1052, the inner annular bump 1054 and the outer annular bump 1056 are in sealing contact with the slide sleeve 1052 and the housing 1051, respectively. The outer annular lug 1056 is located above the inner annular lug 1054, and a second liquid passing hole is arranged on the side wall of the sliding sleeve 1052 between the inner annular lug and the inner annular lug, and the second liquid passing hole is sealed by a second shear pin 1057. The side wall of the lower part of the sliding sleeve 1052 is provided with a third liquid passing hole 10521, after the first shear pin 1055 and the second shear pin 1057 are sheared off, the sliding sleeve 1052 moves downwards to abut against the inner annular limiting step 1053, so that the first liquid passing hole 10511 is opposite to the third liquid passing hole 10521.
After the impact rod is thrown into the test string 1, the impact rod breaks the first shear pin 1055 and the second shear pin 1057 in the downward movement process, and the sliding sleeve 1052 moves downward. Note that, at this time, the inner annular projection 1054 and the outer annular projection 1056 cooperate with the slide sleeve 1052 and the housing 1051 to form a closed annular space, and the annular space is filled with liquid. In the process of the downward movement of the sliding sleeve 1052, the liquid in the annular space continuously flows out from the second liquid passing hole, so that the sliding sleeve 1052 slowly moves downward until the sliding sleeve 1052 abuts against the inner annular limiting step 1053, the first liquid passing hole 10511 is opposite to the third liquid passing hole 10521, and the communication between the test oil pipe column 1 and the test layer is further realized.
By arranging the first shear pin 1055 and the second shear pin 1057, the fixation of the sliding sleeve 1052 on the housing 1051 and the blocking of the second liquid passing hole are realized. Through be provided with outer annular lug 1056 on the outer wall of sliding sleeve 1052, and be provided with interior annular lug 1054 and interior annular spacing step 1053 on the casing 1051 inner wall of first liquid hole 10511 top and below respectively, make interior annular lug 1054 and outer annular lug 1056 respectively with sliding sleeve 1052 and casing 1051 sealing contact, guaranteed that two shear pins are broken by the striking stick back, sliding sleeve 1052 can move down slowly in casing 1051, not only can realize the intercommunication of oil testing tubular column 1 and test layer, and the time of oil testing tubular column 1 with the test layer intercommunication has been delayed, sufficient time has been provided for the throttle spare of follow-up input, avoided test layer output sample and throttle spare to collide, thereby dash out oil testing tubular column 1 with this throttle spare, influence the going on smoothly of oil testing operation.
After the oil testing operation is completed, in order to keep the well bore clean, the embodiment of the invention presses and opens the reverse circulation valve 109 (see figure 1) through the annular space, and the well is washed through the circulation well pressing. The reverse circulation valve 109 is connected with the lower end of the positioning nipple 101 through the oil pipe 2.
Among these, the reverse circulation valve 109 is common in the art and commercially available to those skilled in the art, and may be produced and sold by Puyang Korokee mechanical engineering technology, Inc., for example.
In the embodiment of the invention, the positioning nipple 101, the throttle valve 102, the pressure gauge support cylinder 103, the packer 104, the negative pressure tapping component 105, the rod throwing initiator 106, the shock absorber 108 and the reverse circulation valve 109 are all in threaded connection with the oil pipe 2. Through adopting threaded connection's mode, not only guaranteed the fastening connection of each part and oil pipe 2, convenient to detach is convenient for change when certain part takes place to damage moreover.
In an embodiment of the present invention, the packer 104 may be set as an RTTS packer. RTTS packers are well known in the art and are large bore, packer-type, two-way pressure-tight, suspended packers, including, for example, J-slot indexing mechanisms, slips, packing elements, and hydraulic anchoring mechanisms. When preparing to go into the well, the J-shaped groove is arranged in a locking position, the slips are in a contraction state, in the process of going into the well, when the test oil pipe column 1 reaches a testing position for preparation operation, the test oil pipe column 1 is rotated rightwards, the test oil pipe column 1 is kept in right-handed torque, the test oil pipe column 1 is put down until the packer slips start to bear the weight of the pipe column, then the test oil pipe column 1 is continuously put down until the packer bears the expected setting weight, and at this moment, the setting is finished. When the underground formation pressure of the RTTS packer is greater than the liquid column pressure, the hydraulic anchoring mechanism of the packer extends out to be clamped on the wall of a casing, and the packer can be prevented from being pushed to cause the sealing losing phenomenon when the lower pressure of the RTTS packer is too high.
In a second aspect, based on the oil testing device provided above, an embodiment of the present invention provides a method for performing oil testing operation by using the device, where the method includes:
the method comprises the following steps of putting a test oil pipe column 1 into a shaft, positioning a position to be tested through a positioning short section 101, setting a packer 104 at the position to be tested, putting an impact rod into the test oil pipe column 1, enabling the impact rod to impact and penetrate through a negative pressure tapping assembly 105, and enabling the negative pressure tapping assembly 105 to be communicated with a test layer after being impacted by the impact rod;
the percussion rod strikes a shooting bar initiator 106 after passing through a negative pressure perforating assembly 105, a perforating gun 107 is ignited through the shooting bar initiator 106 so that the perforating gun 107 perforates a test layer, and in the process, a throttling element is thrown into a throttling valve 102 from a test oil pipe column 1 so as to throttle a test layer produced sample flowing through the throttling valve 102;
after the perforating gun 107 finishes perforating, a test layer output sample enters the test oil pipe column 1 through the negative pressure perforating assembly 105 and is discharged to the ground along the test oil pipe column 1, the test layer output sample is obtained, in the process, the underground pressure is obtained through the pressure gauge support cylinder 103, and the test oil operation is finished.
By using the method provided by the invention, the throttling element is put into the throttling valve 102 to throttle the test layer sample flowing through the throttling valve 102, and the difference value between the pressure value of the shaft and the formation pressure value can be always in the preset range without adding a liquid pad into the test oil pipe column 1, so that the cost and the labor intensity of workers are reduced, and the phenomenon that the test layer output sample is mixed with the liquid pad when being discharged upwards is avoided, thereby influencing the determination of the test layer output sample parameters. In addition, the invention can also reduce the impact force on the test oil pipe column 1 when the perforating gun 107 perforates, and ensure the stable operation of the test oil operation.
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 (7)
1. An oil testing device, characterized in that the device includes: the device comprises a test oil pipe column (1), a throttling piece and a striking rod;
the test oil pipe column (1) comprises: a positioning short joint (101), a throttle valve (102), a pressure gauge supporting cylinder (103), a packer (104), a negative pressure tapping component (105) and a rod throwing initiator (106) which are sequentially communicated from top to bottom through a plurality of oil pipes (2);
a perforating gun (107) arranged at the lower end of the shot initiator (106);
the throttling piece is used for being thrown into the throttling valve (102) to throttle a test layer produced sample flowing through the throttling valve (102);
the percussion rod is used for impacting the shooting rod initiator (106) after passing through the negative pressure perforating assembly (105), so that the shooting rod initiator (106) ignites the perforating gun (107);
the negative pressure tapping assembly (105) is communicated with a test layer after being impacted by the impacting rod;
the negative pressure vent assembly (105) includes: a housing (1051) and a slide sleeve (1052);
a first liquid passing hole (10511) is formed in the side wall of the lower portion of the shell (1051), and an inner annular convex block (1054) and an inner annular limiting step (1053) are respectively arranged on the inner wall of the shell (1051) above and below the first liquid passing hole (10511);
the sliding sleeve (1052) is fixed on the shell (1051) through a first shear pin (1055); and an outer annular lug (1056) is arranged on the outer wall of the sliding sleeve (1052), and the inner annular lug (1054) and the outer annular lug (1056) are respectively in sealing contact with the sliding sleeve (1052) and the shell (1051);
the outer annular lug (1056) is positioned above the inner annular lug (1054), and a second liquid passing hole is arranged on the side wall of the sliding sleeve (1052) between the inner annular lug and the inner annular lug, and the second liquid passing hole is sealed by a second shear pin (1057);
a third liquid through hole (10521) is arranged on the side wall of the lower part of the sliding sleeve (1052), and after the first shear pin (1055) and the second shear pin (1057) are sheared off, the sliding sleeve (1052) moves downwards to abut against the inner annular limiting step (1053), so that the first liquid through hole (10511) is opposite to the third liquid through hole (10521).
2. The device of claim 1, wherein the orifice member is provided with a longitudinal orifice and the side wall is provided with a resilient projection;
a clamping groove matched with the elastic lug is formed in the throttle valve (102);
the elastic lug is matched with the clamping groove and used for enabling the throttling piece to be clamped with the throttling valve (102).
3. The arrangement according to claim 1, characterized in that the test string (1) further comprises: and the shock absorber (108) is connected with the upper end of the negative pressure hole assembly (105) through the oil pipe (2).
4. The arrangement according to claim 3, characterized in that the test string (1) further comprises: and the reverse circulation valve (109) is connected with the lower end of the positioning short joint (101) through the oil pipe (2).
5. The device according to claim 4, characterized in that the positioning nipple (101), the throttle valve (102), the pressure gauge stinger (103), the packer (104), the negative pressure vent assembly (105), the rod initiator (106), the shock absorber (108), the reverse circulation valve (109) are all threadedly connected with the tubing (2).
6. The apparatus of claim 1, wherein the packer (104) is an RTTS packer.
7. A method for performing a test run using the apparatus of any one of claims 1 to 6, the method comprising:
putting a test oil pipe column (1) into a shaft, positioning a position to be tested through a positioning short joint (101), setting a packer (104) at the position to be tested, putting a striking rod into the test oil pipe column (1), so that the striking rod strikes and penetrates through a negative pressure tapping assembly (105), and the negative pressure tapping assembly (105) is communicated with a test layer after being struck by the striking rod;
the impact rod impacts a shooting bar initiator (106) after passing through the negative pressure perforating assembly (105), a perforating gun (107) is ignited by the shooting bar initiator (106) so that the perforating gun (107) perforates the test layer, and a throttling element is thrown into a throttling valve (102) in the process so as to throttle the test layer produced sample flowing through the throttling valve (102);
after the perforation gun (107) finishes perforation, the test layer output sample enters the oil testing pipe column (1) through the negative pressure perforating assembly (105) and is discharged to the ground along the oil testing pipe column (1), the test layer output sample is obtained, in the process, the underground pressure is obtained through the pressure gauge support cylinder (103), and oil testing operation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711282801.1A CN109915130B (en) | 2017-12-07 | 2017-12-07 | Oil testing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711282801.1A CN109915130B (en) | 2017-12-07 | 2017-12-07 | Oil testing device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109915130A CN109915130A (en) | 2019-06-21 |
| CN109915130B true CN109915130B (en) | 2022-02-01 |
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| CN113719258B (en) * | 2020-05-12 | 2023-04-25 | 中国石油天然气股份有限公司 | Downhole throttling method and device |
| CN113202465B (en) * | 2021-06-08 | 2022-11-11 | 长春市斯普瑞新技术有限责任公司 | Sliding sleeve closed type underground sampler |
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