CN108533248B - Casing annulus pressure simulator - Google Patents
Casing annulus pressure simulator Download PDFInfo
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- CN108533248B CN108533248B CN201810512884.7A CN201810512884A CN108533248B CN 108533248 B CN108533248 B CN 108533248B CN 201810512884 A CN201810512884 A CN 201810512884A CN 108533248 B CN108533248 B CN 108533248B
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- 238000012360 testing method Methods 0.000 claims abstract description 173
- 239000007788 liquid Substances 0.000 claims abstract description 131
- 238000007789 sealing Methods 0.000 claims abstract description 106
- 238000004088 simulation Methods 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims description 54
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000005553 drilling Methods 0.000 abstract description 6
- 239000004568 cement Substances 0.000 description 5
- 230000008676 import Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 4
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- 238000013480 data collection Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 239000003129 oil well Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/001—Survey of boreholes or wells for underwater installation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The invention provides a casing annulus pressure simulation device. According to the casing annulus pressure simulation device, through the oil pipe and the casing assembly sleeved on the outer side of the oil pipe, casing drilling comprises a plurality of casings sleeved in sequence from inside to outside, well structures of deep water oil and gas wells are simulated, two ends of each pipeline are respectively and hermetically connected through the sealing device, the sealing device is respectively provided with the test liquid inlet and the test liquid outlet, and the pressure inside the oil pipe, the casing annulus and the first annulus is detected through the pressure sensor, so that pressure values inside the oil pipe and each annulus can be accurately obtained, further underwater inlet safety can be accurately evaluated, production accidents are reduced, and production safety and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of marine oil and gas drilling and development, in particular to a casing annular pressure simulation device.
Background
Deep water oil and gas fields become important places of production for global oil and gas resource supply, and the development of deep water oil and gas resources has the characteristics of high investment, high risk and high return. The underwater wellhead is a key device for drilling, well completion and production of a deep water oil-gas well, wherein the lower end of the underwater wellhead is connected with a multi-layer sleeve in the process of drilling and well completion operation, and the upper end of the underwater wellhead is connected with a blowout preventer stack and a marine riser; in the production process, the lower end of the underwater wellhead is connected with a multi-layer sleeve, the upper end of the underwater wellhead is connected with an underwater christmas tree, and a high-temperature reservoir fluid at the bottom of the well enters the oil production platform through the oil pipe through the underwater wellhead, the christmas tree and the vertical pipe. Due to the limitation of cementing technology and the design of a well cementation scheme, part of completion fluid is reserved in an annular space between each layer of casing, the upper end of a completion fluid column is a wellhead casing hanger, and the lower end of the completion fluid column is a cement ring, so that a closed space is formed. However, in the fracturing yield increasing operation and the production process, the well cementation cement sheath is affected by heat transfer of a well shaft and thermal expansion and pressurization of annular fluid, the well cementation cement sheath is affected by various loads such as temperature change, internal pressure change and the like, and the well cementation cement sheath is subjected to tensile failure and shearing failure, and the tensile failure and the shearing failure can cause tiny cracks or annular gaps in the well cementation cement sheath. High-pressure gas in the reservoir flows into the multi-layer sleeve annular space of the wellhead to be gathered through cracks or annular gaps, the pressure of fluid in the multi-layer sleeve annular space is continuously increased along with the increase of the mass of gas in the sealed annular space, and after the pressure in the multi-layer sleeve annular space exceeds a certain pressure value, the sleeve is damaged, so that the safety of an oil-gas well is influenced.
In the prior art, the underwater wellhead is complex in installation and structure, the pressure value between the annular spaces of all layers of casings in the testing and production stages of an oil well cannot be directly measured, and the pressure value can only be obtained by a theoretical calculation method, so that the wellhead safety is evaluated.
However, by theoretically analyzing the pressure change of the annular space of each layer of casing, certain differences exist between the assumed conditions and the calculated parameters of the theoretical model and the actual multi-layer casing annular space structure of the well shaft, so that the calculated result has large difference from the actual pressure of the multi-layer casing annular space, and the actual requirement of wellhead safety evaluation cannot be met.
Disclosure of Invention
The invention provides a casing annular pressure simulation device, which aims to solve the technical problems that the existing theory is inaccurate in calculating casing annular pressure and the safety evaluation requirement of a wellhead cannot be met.
The invention provides a casing annulus pressure simulation device, which comprises: the pressure sensor, the oil pipe and the sleeve assembly are sleeved on the outer side of the oil pipe; the casing assembly comprises a plurality of casings which are sleeved in sequence from inside to outside, gaps between adjacent casings form casing annular space, and gaps between the casing of the innermost layer and the oil pipe form a first annular space; the oil pipe is in sealing connection with the first ends of the plurality of sleeves through a first sealing device, and the oil pipe is in sealing connection with the second ends of the plurality of sleeves through a second sealing device; the first sealing device is provided with a test liquid outlet which is respectively communicated with the oil pipe, the sleeve annular space and the first annular space; the second sealing device is provided with a test fluid inlet which is respectively communicated with the oil pipe, the sleeve annular space and the first annular space; the pressure sensors are used for measuring the pressure inside the oil pipe, the casing annulus and the first annulus respectively.
The casing annulus pressure simulation device is characterized in that the outer side surface of the outermost casing is provided with the strain gauge for detecting the deformation of the outermost casing.
The casing annulus pressure simulation device as described above, wherein the first sealing device comprises: tubing head, casing head and flange plate; the center of the flange plate is provided with a center through hole; the first end of the oil pipe passes through the central through hole and is connected with the oil pipe head in a sealing way, and a first sealing piece is arranged between the first end of the oil pipe and the oil pipe head; the first end of each sleeve is correspondingly provided with one sleeve head and is in sealing connection with the first end of the sleeve head; the second end of each casing head is in sealing connection with the flange plate.
The casing annulus pressure simulation device comprises a flange plate, wherein the flange plate is provided with a first test channel communicated with the first annulus and a casing test channel communicated with the casing annulus; an oil pipe test channel communicated with the oil pipe is arranged on the oil pipe head; the first test channel, the sleeve test channel and the oil pipe test channel are internally provided with the pressure sensor respectively.
The casing annulus pressure simulation device comprises a casing annulus pressure simulation device, wherein the test fluid outlet comprises an oil pipe test fluid outlet, a first test fluid outlet and a casing test fluid outlet; the oil pipe test liquid outlet is arranged on the oil pipe head, and an oil pipe liquid outlet channel which is communicated with the inside of the oil pipe and the oil pipe test liquid outlet is arranged on the oil pipe head; the first test liquid outlet and the sleeve test liquid outlet are respectively arranged on the flange plate, and the flange plate is provided with a first liquid outlet channel communicated with the first test liquid outlet and the first annular space and a sleeve liquid outlet channel communicated with the sleeve test liquid outlet and the sleeve annular space.
The casing annulus pressure simulation device is characterized in that an oil pipe air discharge port is further formed in the oil pipe head, and an oil pipe air discharge channel which is communicated with the inside of the oil pipe and the oil pipe air discharge port is formed in the oil pipe head; the flange plate is also provided with a first air vent and a sleeve air vent; and the flange plate is also provided with a first air release channel communicated with the first air release port and the first annular space and a sleeve air release channel communicated with the sleeve air release port and the sleeve annular space.
A casing annulus pressure simulation device as described above, wherein the second sealing device comprises: a plurality of quill bases; the first end of the oil pipe seat is connected with the second end of the oil pipe in a sealing way; the second end of each sleeve is correspondingly provided with a sleeve seat and is in sealing connection with the first end of the sleeve seat; the second ends of the oil pipe seat and the second ends of the plurality of sleeve seats are sequentially and hermetically connected from inside to outside.
The casing annulus pressure simulation device as described above, wherein the oil pipe seat comprises: the oil pipe seat comprises an oil pipe seat body, a first seat body arranged at a first end of the oil pipe seat body and a second seat body arranged at a second end of the oil pipe seat body, wherein the diameter of the second seat body is larger than that of the oil pipe seat body; the second end of the oil pipe is sleeved on the outer side of the first seat body; the sleeve seat comprises a sleeve seat body and a sleeve seat bulge arranged at the first end of the sleeve seat body; the second end of the sleeve is sleeved on the outer side of the sleeve seat bulge; the oil pipe seat body and the sleeve seat bodies are sequentially and hermetically connected from inside to outside.
The casing annulus pressure simulation device comprises a casing annulus pressure simulation device, wherein the test fluid inlet comprises an oil pipe test fluid inlet, a first test fluid inlet and a casing test fluid inlet; the second seat body is provided with a bottom joint, the oil pipe test liquid inlet is arranged on the bottom joint, and an oil pipe liquid inlet channel which is communicated with the inside of the oil pipe and the oil pipe test liquid inlet is arranged in the center parts of the bottom joint, the oil pipe seat body and the first seat body; the first test liquid inlet is arranged on the second seat body, and a first liquid inlet channel which is communicated with a first annular space and the first test liquid inlet is arranged at the edge parts of the second seat body and the oil pipe seat body; the casing test fluid inlet is arranged on the casing seat, and a casing fluid inlet channel which is communicated with the casing annulus and the casing test fluid inlet is arranged in the casing seat.
The casing annulus pressure simulation device further comprises a data acquisition device and a hydraulic control device; the data acquisition device is electrically connected with the pressure sensor; the hydraulic control device is communicated with the test liquid outlet through a hydraulic backflow pipeline and is communicated with the test liquid inlet through a hydraulic liquid inlet pipeline.
According to the casing annulus pressure simulation device, through the oil pipe and the casing assembly sleeved on the outer side of the oil pipe, casing drilling comprises a plurality of casings sleeved in sequence from inside to outside, well structures of deep water oil and gas wells are simulated, two ends of each pipeline are respectively and hermetically connected through the sealing device, the sealing device is respectively provided with the test liquid inlet and the test liquid outlet, and the pressure inside the oil pipe, the casing annulus and the first annulus is detected through the pressure sensor, so that pressure values inside the oil pipe and each annulus can be accurately obtained, further underwater inlet safety can be accurately evaluated, production accidents are reduced, and production safety and efficiency are improved.
Drawings
FIG. 1 is a schematic diagram of a casing annulus pressure simulator of the present invention;
FIG. 2 is an enlarged schematic view of a portion of the first seal of FIG. 1;
FIG. 3 is a schematic view of the second sealing device of FIG. 1;
Fig. 4 is a schematic view of the oil pipe seat in fig. 3.
Reference numerals illustrate:
1: an oil pipe; 11: a tubing head; 111: a tubing head body; 112: the tubing head is raised; 113: an oil pipe test channel; 114: an oil pipe liquid outlet channel; 115: an oil pipe air release passage; 12: a base; 121: an oil pipe seat body; 122: a first base; 123: a second seat body; 124: an oil pipe liquid inlet channel; 125: a first liquid inlet channel;
2: a first sleeve; 21: a first casing head; 22: a first cannula holder; 221: a first cannula holder body; 222: a first cannula mount boss;
3: a second sleeve; 31: a second casing head; 32: a second sleeve mount; 321: a second cannula holder body; 322: a second cannula mount boss; 323: a second liquid inlet channel;
4: a third sleeve; 41: a third casing head; 42: a third sleeve mount; 421: a third cannula holder body; 422: a third cannula mount boss; 423: a third liquid inlet channel;
5: a fourth sleeve; 51: a fourth casing head; 52: a fourth sleeve mount; 521: a fourth cannula holder body; 522: a fourth cannula mount boss; 523: a fourth liquid inlet channel;
6: a pressure sensor; 7: a strain gage;
8: a flange plate; 801: a first test channel; 802: a second test channel; 803: a third test channel; 804: a fourth test channel; 805: a first liquid outlet channel; 806: a second liquid outlet channel; 807: a third liquid outlet channel; 808: a fourth liquid outlet channel; 809: a first bleed passage; 810: a second bleed passage; 811: a third bleed passage; 812: a fourth bleed passage;
9: a bottom joint; 10: a hydraulic control device; 101: a hydraulic return line; 102: a hydraulic feed line; 103: a hydraulic line joint;
20: a first annulus; 30: a second annulus; 40: a third annulus; 50: a fourth annulus; 60: a data acquisition device; 601: testing the lead wire; 70: a bleed valve; 80: a fastener; 90: and a seal.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
FIG. 1 is a schematic diagram of a casing annulus pressure simulator of the present invention; FIG. 2 is an enlarged schematic view of a portion of the first seal of FIG. 1; FIG. 3 is a schematic view of the second sealing device of FIG. 1; fig. 4 is a schematic view of the oil pipe seat in fig. 3.
Referring to fig. 1 to 4, the present embodiment provides a casing annulus pressure simulation apparatus, including: the pressure sensor 6, the oil pipe 1 and the sleeve assembly sleeved outside the oil pipe 1; the casing assembly comprises a plurality of casings which are sleeved in sequence from inside to outside, gaps between adjacent casings form casing annular spaces, and gaps between the casing of the innermost layer and the oil pipe 1 form first annular spaces 20; the oil pipe 1 is in sealing connection with the first ends of the plurality of sleeves through a first sealing device, and the oil pipe 1 is in sealing connection with the second ends of the plurality of sleeves through a second sealing device; the first sealing device is provided with a test fluid outlet which is respectively communicated with the oil pipe 1, the sleeve annular space and the first annular space 20; the second sealing device is provided with a test liquid inlet which is respectively communicated with the oil pipe 1, the sleeve annular space and the first annular space; the pressure sensors 6 are provided in plural numbers for detecting the internal pressures of the oil pipe, the casing annulus and the first annulus, respectively.
Specifically, the sleeve assembly in this embodiment may include two, three, and so on, multiple sleeves that are sequentially sleeved by the internal phase. Preferably, the casing assembly comprises a first casing 2, a second casing 3, a third casing 4 and a fourth casing 5 which are sleeved in sequence from inside to outside, wherein a gap between the first casing 2 and the oil pipe 1 forms a first annular space 20, a gap between the second casing 3 and the first casing 2, a gap between the second casing 3 and the first casing 2 forms a third annular space 40, a gap between the third casing 4 and the second casing 3 forms a fourth annular space, and a gap between the fourth casing 5 and the third casing 4 forms a fourth annular space. The oil pipe 1, the first sleeve 2, the second sleeve 3, the third sleeve 4 and the fourth sleeve 5 are all cylindrical, the oil pipe 1 simulates an oil pipe structure in actual production, the first sleeve 2 simulates a production sleeve in actual production, the second sleeve 3 simulates an intermediate sleeve in actual production, the third sleeve 4 simulates a surface sleeve in actual production, and the fourth sleeve 5 simulates a surface sleeve guide pipe in actual production. The first ends of the oil pipe 1 and each sleeve are in sealing connection through a first sealing device, and the second ends of the oil pipe 1 and each sleeve are in sealing connection through a second sealing device, wherein the first sealing device and the second sealing device can be connected through a joint, can be welded or the like, and are not limited herein. By the arrangement, the well structure of the deepwater oil-gas well is simulated.
In order to simulate the flow of liquid in each annulus in a deep water oil-gas well, the first sealing device is provided with test liquid outlets which are respectively communicated with the oil pipe 1, the first annulus 20, the second annulus 30, the third annulus 40 and the fourth annulus 50, the second sealing device is provided with test liquid inlets which are respectively communicated with the oil pipe 1, the first annulus 20, the second annulus 30, the third annulus 40 and the fourth annulus 50, and the test liquid outlets and the test liquid inlets are respectively communicated with the liquid supply device through pipelines, so that test liquid with preset pressure can be formed in each pipeline to simulate the liquid state in the deep water oil-gas well.
The pressure sensor 6 may be disposed in the oil pipe 1, the first annulus 20, the second annulus 30, the third annulus 40 and the fourth annulus 50, respectively, the pressure sensor 6 may be disposed in other passages communicating with the oil pipe 1, the first annulus 20, the second annulus 30, the third annulus 40 and the fourth annulus 50, for example, a test passage communicating with the oil pipe 1 and the inside of each annulus is provided on the first sealing device or the second sealing device, and the pressure sensor is installed in the test passage. The invention is not limited to the type of pressure sensor.
The sleeve annular pressure simulation device provided by the embodiment, through oil pipe and sleeve pipe subassembly of establishing in the oil pipe outside, sleeve pipe subassembly includes a plurality of sleeve pipes of establishing from interior outside cover in proper order, simulate the well bore structure of deep-water oil gas well, sealing connection is realized through sealing device respectively at the both ends of each pipeline, and be provided with test fluid import and test fluid export on the sealing device respectively, detect the internal pressure of oil pipe through pressure sensor, sleeve pipe annular and first annular, thereby can accurately obtain the pressure value in oil pipe and each annular, and then can accurately evaluate import safety under water, reduce the production accident, improve production safety and efficiency.
Further, in order to verify the accuracy of the pressure measured by the casing annulus pressure simulation device, the outer side surface of the outermost casing of the embodiment is provided with a strain gauge 7 for detecting the deformation of the outermost casing. And testing the mechanical deformation of the outermost sleeve through the strain gauge 7, then calculating to obtain the pressure value in the outermost sleeve, comparing the pressure value with the pressure value tested by the pressure sensor arranged in the outermost sleeve, and judging the consistency of the simulation device. The type of the strain gage of the present invention is not limited.
Of course, in order to verify the accuracy of each pressure value in the oil pipe and the multi-layer sleeve, the outer side surfaces of the oil pipe 1, the first sleeve 2, the second sleeve 3, the third sleeve 4 and the fourth sleeve 5 can be provided with strain gauges, test leads of the strain gauges are connected to the outside of each layer of sleeve through a first sealing device or a second sealing device, and the test leads are required to be well sealed through the first sealing device or the second sealing device, so that the tightness in the oil pipe and each layer of sleeve is ensured.
In some alternative embodiments, the first sealing means comprises: tubing head 11, casing head and flange 8; the center of the flange 8 is provided with a center through hole; the first end of the oil pipe 1 passes through the central through hole and is connected with the oil pipe head 11 in a sealing way; the first end of each casing head is correspondingly provided with one casing head and is in sealing connection with the first end of the casing head; the second end of each casing head is in sealing connection with the flange 8.
The casing assembly includes a plurality of casings, with corresponding casing heads also provided in plurality. Taking the example of a casing assembly comprising a first casing 2, a second casing 3, a third casing 4 and a fourth casing 5, the first sealing means comprises tubing head 11, first casing head 21, second casing head 31, third casing head 41, fourth casing head 51 and flange 8.
The central part of the flange 8 is provided with an axial central through hole, and the first end of the oil pipe 1 passes through the central through hole and is in sealing connection with the oil pipe head 11. The tubing head 11 comprises a tubing head body 111 and a tubing head protrusion 112 arranged at the second end of the tubing head body 111, the diameter of the tubing head protrusion 112 is smaller than that of the tubing head body 111, the first end of the tubing 1 is sleeved on the outer side of the tubing head protrusion 112, the tubing 1 and the tubing head protrusion 112 are fixedly connected through the fastener 80, and the tubing head protrusion 112 is provided with a mounting groove for mounting the sealing element 90 so as to ensure tightness with the tubing 1. Alternatively, the fasteners 80 may be provided in plural, for example, three, four, etc., at intervals in the circumferential direction of the oil pipe 1. Alternatively, the seal 90 may be provided with one or more of two, three, etc., with a plurality of seals 90 being spaced axially along the tubing head boss 112. Of course, tubing head boss 112 may also be fixedly connected to the first end of tubing 1 by a threaded connection, an intermediate joint, or the like.
First casing head 21 includes a first casing head body and a first casing head protrusion disposed at a second end of the first casing head body, and the diameter of the first casing head body is greater than the diameter of the first casing head protrusion. The first casing head body and the raised central part of the first casing head are provided with axial through holes. The first end of the first sleeve 2 is sleeved on the protruding outer side face of the first sleeve head, and the end face of the first end of the first sleeve 21 is abutted with the end face of the second end of the first sleeve head body. Alternatively, the first end of the first cannula 2 may be threaded, fixedly attached by fasteners or the like, preferably the first end of the first cannula 2 is welded to the first cannula head protrusion. Preferably, flange 8 is fixedly attached to the first end of the first casing head body by fasteners 80. The plurality of fasteners 80 may be a plurality, e.g., three, four, etc., with the plurality of fasteners 80 being spaced apart along the circumference of the first casing head body. A seal may also be provided between flange 8 and the first casing head body.
The structure and connection of second casing head 31, third casing head 41, and fourth casing head 51 are the same as those of first casing head 21, and will not be described in detail herein.
Further, a first test channel 801 communicated with the first annulus 20 and a sleeve test channel communicated with the sleeve annulus are arranged on the flange plate 8; the tubing head 11 is provided with a tubing test channel 113 communicated with the tubing 1; the first test channel 801, the casing test channel, and the tubing test channel 113 are each provided with a pressure sensor 6.
Specifically, a common central passage is axially provided in the central portion of the tubing head boss 112 of the tubing head 11, the tubing head body 111 is provided with a tubing test passage 113, the tubing test passage 113 communicates with the interior of the tubing 1 through the common central passage, and the pressure sensor 6 is provided in the tubing test passage 113. The pressure sensor 6 may be screwed to the oil pipe test channel 113, or the pressure sensor 6 may be placed in the oil pipe test channel 113, and then the sealant is filled for sealing and fixing connection. Preferably, the second end of the pressure sensor 6 is screwed with the tubing test channel 113, and the first end of the pressure sensor 6 is located outside the tubing test channel 113, so as to facilitate connection of the test lead 601.
The flange 8 is provided with a first test passage 801 communicating with the first annulus 20, a second test passage 802 communicating with the second annulus 30, a third test passage 803 communicating with the third annulus 40, and a fourth test passage 804 communicating with the fourth annulus 50. The first test channel 801, the second test channel 802, the third test channel 803, and the fourth test channel 804 are provided with pressure sensors 6, respectively. Preferably, the second end of the pressure sensor 6 is screwed with the test channel, and the first end of the pressure sensor 6 is located outside the test channel, so as to be conveniently connected with the test lead 601.
Further, the test liquid outlet comprises an oil pipe test liquid outlet, a first test liquid outlet and a sleeve test liquid outlet; the oil pipe test liquid outlet is arranged on the oil pipe head 11, and an oil pipe liquid outlet channel 114 which is communicated with the inside of the oil pipe 1 and the oil pipe test liquid outlet is arranged on the oil pipe head 11; the first test liquid outlet and the sleeve test liquid outlet are respectively arranged on the flange plate 8, and the flange plate 8 is provided with a first liquid outlet passage 805 which is communicated with the first test liquid outlet and the first annulus 20, and a sleeve liquid outlet passage which is communicated with the sleeve test liquid outlet and the sleeve annulus.
Specifically, the tubing test fluid outlet is located on the tubing head body 111, and a tubing fluid outlet channel 114 is provided on the tubing head body 111, the tubing fluid outlet channel 114 communicating with the interior of the tubing 1 through a common central channel on the tubing head boss 112. Preferably, the tubing outlet channel 114 is opposite the tubing test channel 113. The line of the liquid supply device communicates with the oil pipe outlet channel 114 through a hydraulic line connection, which may be screwed with the oil pipe outlet channel 114.
The flange 8 is provided with a first test liquid outlet, a second test liquid outlet, a third test liquid outlet and a fourth test liquid outlet, and the flange 8 is further provided with a first liquid outlet 805, a second liquid outlet 806, a third liquid outlet 807 and a fourth liquid outlet 808, wherein the first liquid outlet 805 is communicated with the first annulus 20, the second liquid outlet 806 is communicated with the second annulus 30, the third liquid outlet 807 is communicated with the third test liquid outlet and the third annulus 40, and the fourth liquid outlet 808 is communicated with the fourth test liquid outlet and the fourth annulus 50.
Alternatively, where flange 8 is fixedly coupled to the first end of the first casing head body by fasteners 80, first fluid outlet passageway 805 is disposed in the space between adjacent two fasteners 80, and first test passageway 801 may be disposed in the same space as first fluid outlet passageway 805, although for ease of installation, it is preferred that first test passageway 801 be disposed in the space between additional adjacent fasteners 80. The second liquid outlet channel 806, the third liquid outlet channel 807 and the fourth liquid outlet channel 808 are similar to the first liquid outlet channel 805, and will not be described herein.
In order to introduce liquid into the oil pipe and each layer of sleeve, the oil pipe head 11 is also provided with an oil pipe air discharging port, and the oil pipe head 11 is internally provided with an oil pipe air discharging channel 115 which is communicated with the inside of the oil pipe 1 and the oil pipe air discharging port; the flange 8 is also provided with a first air vent and a sleeve air vent; and the flange plate 8 is also provided with a first deflation channel 809 communicated with the first deflation port and the first annulus 10 and a sleeve deflation channel communicated with the sleeve deflation port and the sleeve annulus.
Specifically, the tubing relief port 11 is provided on the tubing head body 111 of the tubing head 11, and the tubing relief passage 115 is provided on the tubing head body 111, the tubing relief passage 115 communicating with the interior of the tubing 1 through a common central passage on the tubing head boss 112. Optionally, the tubing head body 111 is of a cross-shaped four-channel structure, a first channel of the cross-shaped four channels being in communication with and coaxial with a common central channel of the tubing head protrusion 112; the second of the four cross-shaped channels is an oil pipe test channel 113, the axial direction of which is perpendicular to the common central channel; the third of the four cross-shaped channels is an oil pipe liquid outlet channel 114, and the axial direction of the oil pipe liquid outlet channel is perpendicular to the shared central channel; the fourth of the four channels in the cross is a tubing bleed channel 115, which is coaxial with the common central channel.
The flange 8 is provided with a first air release port, a second air release port, a third air release port and a fourth air release port, and the flange 8 is further provided with a first air release channel 809, a second air release channel 810, a third air release channel 811 and a fourth air release channel 812. Wherein the first bleed passage 809 communicates with the first bleed port and the first annulus 20, the second bleed passage 810 communicates with the second bleed port and the second annulus 30, the third bleed passage 811 communicates with the third bleed port and the third annulus 40, and the fourth bleed passage 812 communicates with the fourth bleed port and the fourth annulus 50. In the experimental process, the oil pipe air release port, the first air release port, the second air release port, the third air release port and the fourth air release port are plugged by using the air release valve 70; when the oil pipe 1 and the respective casing annuluses need to be filled with the test liquid, the purge valve 70 is opened, and the test liquid is introduced into the oil pipe 1 and the respective casing annuluses. The bleed valve 70 may be of a conventional bleed valve construction, as the invention is not limited in this regard.
Alternatively, in the case that the flange 8 is fixedly connected to the first end of the first casing head body through the fastener 80, the first air release channel 809 may be separately disposed in the interval between two adjacent fasteners 80, and when the interval between two adjacent fasteners 80 is relatively large, the first air release channel 809 may also be disposed in the same interval as the first test channel 801 and the first liquid outlet channel 805, for example, as shown in fig. 2, the first air release channel 809 and the first test channel 801 are disposed in the same interval, but the invention is not limited thereto. The second deflation channel 810, the third deflation channel 811, and the fourth deflation channel 812 are similar to the first deflation channel 809, and will not be described here.
With continued reference to fig. 1 to 4, the second sealing device in this embodiment includes: a base 12 and a plurality of sleeve holders; the first end of the oil pipe seat 12 is in sealing connection with the second end of the oil pipe 1; the second end of each sleeve is correspondingly provided with a sleeve seat and is in sealing connection with the first end of the sleeve seat; the second end of the oil pipe seat 12 and the second ends of the plurality of sleeve seats are sequentially and hermetically connected from inside to outside.
Taking the case of a sleeve assembly comprising a first sleeve 2, a second sleeve 3, a third sleeve 4 and a fourth sleeve 5 sleeved in turn from inside to outside as an example, the second sealing device specifically comprises an oil pipe seat 12, a first sleeve seat 22, a second sleeve seat 32, a third sleeve seat 42 and a fourth sleeve seat 52. The first end of the oil pipe seat 12 is in sealing connection with the second end of the oil pipe 1, and the second end of the oil pipe seat 12 is in sealing connection with the second end of the first sleeve seat 22; the first end of the first sleeve seat 22 is in sealing connection with the second end of the first sleeve 2; the first end of the second sleeve holder 32 is in sealing connection with the second end of the second sleeve 3, and the second end of the second sleeve holder 32 is in sealing connection with the second end of the first sleeve holder 22; the first end of the third sleeve holder 42 is in sealing connection with the second end of the third sleeve 4, and the second end of the third sleeve holder 42 is in sealing connection with the second end of the second sleeve holder 32; the first end of the fourth cannula holder 52 is in sealing connection with the second end of the fourth cannula 5, and the second end of the fourth cannula holder 52 is in sealing connection with the second end of the third cannula holder 42. The sealing connection may be realized by a fastener or a sealing member, or may be realized by a screw connection, and is not limited thereto.
Further, the oil pipe seat 12 includes: the oil pipe seat body 121, a first seat 122 arranged at the first end of the oil pipe seat body 121, and a second seat 123 arranged at the second end of the oil pipe seat body 121, wherein the diameter of the second seat 123 is larger than that of the oil pipe seat body 121; the second end of the oil pipe 1 is sleeved outside the first seat 122; the sleeve seat comprises a sleeve seat body and a sleeve seat bulge arranged at the first end of the sleeve seat body; the second end of the sleeve is sleeved on the outer side of the sleeve seat bulge; the oil pipe seat body 121 and the plurality of sleeve seat bodies are sequentially and hermetically connected from inside to outside.
Specifically, the oil tube seat 12 includes: the oil pipe seat body 121, set up the first pedestal 122 at oil pipe seat body 121 first end and set up the second pedestal 123 at oil pipe seat body 121 second end, and the diameter of second pedestal 123 is greater than the diameter of oil pipe body 121, and the diameter of oil pipe seat body 121 is greater than the diameter of first pedestal 122. The second end of the oil pipe 1 is sleeved on the outer side of the first seat 122, optionally, the first end of the first seat 122 is provided with a sealing groove for installing the sealing element 90, and the outer side surface of the second end of the first seat 122 is provided with external threads which are matched with internal threads arranged on the second end of the oil pipe 1.
The first socket 22 includes a first socket body 221 and a first socket protrusion 222 provided at a first end of the first socket body 221, the first socket body 221 having a diameter greater than that of the first socket protrusion 222. The second end of the first sleeve 2 is sleeved outside the first sleeve seat protrusion 222, and a sealing member 90 is arranged between the first sleeve seat protrusion 222 and the first sleeve 2 to realize sealing. The first cannula holder protrusion 222 may be screwed with the first cannula 2, or the first cannula holder protrusion 222 and the first cannula 2 may be fixedly coupled together by the fastener 80, or the first cannula holder protrusion 222 and the first cannula 2 may be welded together. The first sleeve seat body 221 is sleeved on the outer side of the oil pipe seat body 121, the second end of the first sleeve seat body 221 is fixedly connected with the oil pipe seat body 121, and the end face of the second end of the first sleeve seat body 221 is abutted against the first end face of the second seat body 123. The mounting groove for mounting the sealing element 90 is formed in the outer side face of the oil pipe seat body 121, and the sealing element 90 is mounted in the mounting groove, so that the tightness between the oil pipe seat body 121 and the first sleeve seat body 221 is guaranteed. The second end of the first sleeve seat body 221 and the oil pipe seat body 121 may be fixedly connected by the fastener 80, but other connection forms are also possible, and are not limited herein.
The second socket 32 includes a second socket body 321 and a second socket protrusion 322 provided at a first end of the second socket body 321, the second socket body 321 having a diameter greater than that of the second socket protrusion 322. The second end of the second sleeve 3 is sleeved outside the second sleeve seat protrusion 322, and a sealing member 90 is arranged between the second sleeve seat protrusion 322 and the second sleeve 3 to realize sealing. The connection between the second cannula holder protrusion 322 and the second cannula 3 is the same as the connection between the first cannula holder protrusion 222 and the first cannula 2, and will not be described in detail here. The second casing base body 321 is sleeved on the outer side of the first casing base body 221, and an end surface of the second end of the second casing base body 321 abuts against the first end surface of the second base body 123. The mounting groove for mounting the sealing element 90 is formed in the outer side face of the first sleeve seat body 221, and the sealing element 90 is mounted in the mounting groove, so that the tightness between the first sleeve seat body 221 and the second sleeve seat body 321 is guaranteed. The second cannula holder body 321 and the first cannula holder body 221 may be fixedly connected by the fastener 80, but may be other connection forms, which are not limited herein.
The third cannula holder 42 includes a third cannula holder body 421 and a third cannula holder protrusion 422 provided at a first end of the third cannula holder body 421, the diameter of the third cannula holder body 421 being larger than the diameter of the third cannula holder protrusion 422. The second end of the third sleeve 4 is sleeved outside the third sleeve seat protrusion 422, and a sealing member 90 is arranged between the third sleeve seat protrusion 422 and the third sleeve 4. The connection between the third cannula holder protrusion 422 and the third cannula 4 is the same as the connection between the first cannula holder protrusion 222 and the first cannula 2, and will not be described again. The third cannula holder body 421 is sleeved outside the second tube holder body 321. The connection and sealing form between the third cannula holder body 421 and the second cannula holder body 321 are the same as the connection and sealing form between the second cannula holder body 321 and the first cannula holder body 221, and will not be described herein. Optionally, the second end of the third casing seat body 421 is provided with a boss, and the diameter of the boss is larger than the diameter of the third casing seat body 421.
The fourth cannula holder 52 comprises a fourth cannula holder body 521 and a fourth cannula holder projection 522 arranged at a first end of the fourth cannula holder body 521, the diameter of the fourth cannula holder body 521 being larger than the diameter of the fourth cannula holder projection 522. The second end of the fourth sleeve 5 is sleeved on the outer side of the fourth sleeve seat protrusion 522, and the connection and sealing mode between the fourth sleeve seat protrusion 522 and the fourth sleeve 5 are the same as the connection mode between the first sleeve seat protrusion 222 and the first sleeve 2, which are not described herein. The fourth casing body 521 is sleeved outside the third casing body 421, and an end surface of the second end of the fourth casing body 521 abuts against the boss surface of the third casing 42. The connection and sealing form of the fourth cannula holder body 521 and the third cannula holder body 421 are the same as the connection and sealing form of the second cannula holder body 321 and the first cannula holder body 221, and will not be described herein.
Further, the test liquid inlet comprises an oil pipe test liquid inlet, a first test liquid inlet and a sleeve test liquid inlet; the second seat body is provided with a bottom joint 9, an oil pipe test liquid inlet is arranged on the bottom joint 9, and the center parts of the bottom joint 9, the oil pipe seat body 121 and the first seat body 122 are provided with an oil pipe liquid inlet channel 124 which is communicated with the inside of the oil pipe and the oil pipe test liquid inlet; the first test fluid inlet is arranged on the second seat body 123, and the edge parts of the second seat body 123 and the oil pipe seat body 121 are provided with a first fluid inlet channel 125 which is communicated with the first annular space 20 and the first test fluid inlet; the sleeve testing liquid inlet is arranged on the sleeve seat, and a sleeve liquid inlet channel which is communicated with the sleeve annulus and the sleeve testing liquid inlet is arranged in the sleeve seat.
Specifically, the first end of the bottom joint 9 is provided with an external thread, is connected with an internal thread hole provided at the center of the second seat 123, and the first end of the bottom joint 9 is provided with a mounting groove to mount the sealing member 90 for sealing. The oil pipe test liquid inlet is arranged on the bottom joint 9, a channel is axially arranged at the central part of the bottom joint 9, and a channel coaxial with the channel axially arranged at the central part of the bottom joint 9 is axially arranged at the central parts of the oil pipe seat body 121 and the first seat body 122. The oil pipe liquid inlet channel 124 includes a channel axially opened at the central portion of the bottom connector 9, an oil pipe seat body 121, and a channel axially opened at the central portion of the first seat body 122, and an oil pipe test liquid inlet is communicated with the interior of the oil pipe 1 through the oil pipe liquid inlet channel 124.
Because the second ends of the first casing seat body 221 and the second casing seat body 321 are both abutted to the first end of the second seat body 123, the first test liquid inlet is formed on the second seat body 123, and the edge portions of the second seat body 123 and the oil pipe seat body 121 are provided with the first liquid inlet channel 125, and the first liquid inlet channel 125 is communicated with the first annulus 20 and the first test liquid inlet. Of course, the second end of the second casing seat body 321 and the first end of the second seat body 123 have installation spaces, and the first test fluid inlet may also be disposed on the first casing seat body 221, at this time, a first fluid inlet channel communicating the first test fluid inlet and the first annulus is disposed in the first casing seat body 221 and the first casing seat protrusion 222, and the specific structure is similar to the form in which the second casing seat body 321 is provided with the second test fluid inlet.
The second test fluid inlet is arranged on the second sleeve seat body 321, and a second fluid inlet channel 323 is arranged in the second sleeve seat body 321 and the second sleeve seat bulge 322, and the second fluid inlet channel 323 is communicated with the second test fluid inlet and the second annulus 30.
The third test fluid inlet is disposed on the third casing seat body 421, and a third fluid inlet channel 423 is disposed in the third casing seat body 421 and the third casing seat protrusion 422, and the third fluid inlet channel 423 is communicated with the third test fluid inlet and the third annulus 40.
The fourth test fluid inlet is disposed on the fourth casing seat body 521, and a fourth fluid inlet channel 523 is disposed in the fourth casing seat body 521 and the fourth casing seat protrusion 522, and the fourth fluid inlet channel 523 communicates the fourth test fluid inlet and the fourth annulus 50.
On the basis of the embodiment, the casing annulus pressure simulation device of the embodiment further comprises a data acquisition device 60 and a hydraulic control device 10; the data acquisition device 60 is electrically connected with the pressure sensor 6; the hydraulic control device 10 is communicated with a test liquid outlet through a hydraulic return line 101 and is communicated with a test liquid inlet through a hydraulic inlet line 102.
Specifically, the data collection device 60 is electrically connected to each pressure sensor 6 through a test lead 601, and is electrically connected to the strain gauge 7 through the test lead 601, and performs data collection. Of course, the data acquisition device 60 may be provided with a processor, a display screen, etc., where the processor processes the data and displays it directly on the display screen.
The hydraulic control device 10 is used for controlling the discharge and the discharge of the test liquid in the experiment and the experiment pressure control, and may be a conventional hydraulic servo control device or the like, and is not limited herein. The hydraulic return line 101 and the hydraulic inlet line 102 are respectively provided with a hydraulic line connector 103, and are respectively communicated with the test liquid outlet and the test liquid inlet through the hydraulic line connector 103, wherein the hydraulic line connector 103 can be an existing hydraulic line connector structure, and the invention is not limited to the above.
In the present invention, the seal 90 may be any seal device known in the art, such as a seal ring. The fastener 80 may be any suitable fastening means known in the art, such as a fastening screw.
With continued reference to fig. 1, the installation of the casing annulus pressure simulator, the experimental procedure is described in detail below:
sleeving the oil pipe 1, the first sleeve 2, the second sleeve 3, the third sleeve 4 and the fourth sleeve 5 in sequence from inside to outside; after the sealing element 90 is installed on the tubing head 11, the tubing head is fixedly connected with the first end of the tubing 2 through the fastening element 80; the oil pipe seat 12 is fixedly connected with the second end of the oil pipe 2 after the sealing element 90 is arranged; the bottom sub 2 is fixedly connected with the oil pipe seat 12 after the sealing member 90 is installed. The first end of each sleeve is in sealing connection with the flange plate 8 through a sleeve head, and the second end of each sleeve is in sealing connection through a sleeve seat. The pressure sensor 6 is installed in each test channel, and the strain gauge 7 is installed at the outer side surface of the fourth sleeve 5, and the pressure sensor 6 and the strain gauge 7 are connected to the data acquisition device 60 through the test leads 601. A bleed valve 70 is installed on each bleed passage, and one end of a hydraulic return line 101 is installed on the liquid outlet passage through a hydraulic line joint 103, and the other end of the hydraulic return line 101 communicates with the hydraulic control apparatus 10; one end of the hydraulic feed line 102 is attached to the feed channel via a hydraulic line connection 103, and the other end of the hydraulic feed line 102 communicates with the hydraulic control device 10.
The purge valve 70 is opened and test fluid is pumped into each annulus via the fluid inlet line 102 and after the annulus is filled with fluid, the purge valve 70 is closed. The hydraulic control device 10 pressurizes the respective annular spaces to start the test, and the data acquisition device 60 records the measurement data of the pressure sensor 6 and the strain sensor 7.
The sleeve annulus pressure simulation device provided by the embodiment, sleeve assembly outside oil pipe is established through oil pipe and cover, sleeve drilling includes a plurality of sleeve pipes that cover in proper order from inside to outside, the well bore structure of simulation deep water oil gas well, sealing connection is realized through sealing device respectively at the both ends of each pipeline, and be provided with test fluid import and test fluid export on the sealing device respectively, set up the test channel with oil pipe on the first sealing device, sleeve annulus and first annulus intercommunication, be equipped with pressure sensor in the test channel, be equipped with the foil gage in the telescopic outside of outermost, gather data through data acquisition device, thereby can accurately obtain the pressure value in oil pipe and each annulus, and then can accurately evaluate import safety under water, reduce the production accident, improve production safety and efficiency.
In the description of the present invention, it should be understood that, furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the above description, descriptions of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. A casing annulus pressure simulation device, comprising: the pressure sensor, the oil pipe and the sleeve assembly are sleeved on the outer side of the oil pipe; the casing assembly comprises a plurality of casings which are sleeved in sequence from inside to outside, gaps between adjacent casings form casing annular space, and gaps between the casing of the innermost layer and the oil pipe form a first annular space;
the oil pipe is in sealing connection with the first ends of the plurality of sleeves through a first sealing device, and the oil pipe is in sealing connection with the second ends of the plurality of sleeves through a second sealing device;
the first sealing device is provided with a test liquid outlet which is respectively communicated with the oil pipe, the sleeve annular space and the first annular space; the second sealing device is provided with a test fluid inlet which is respectively communicated with the oil pipe, the sleeve annular space and the first annular space;
The pressure sensors are used for detecting the pressure inside the oil pipe, the casing annulus and the first annulus respectively;
the first sealing device includes: tubing head, casing head and flange plate;
the center of the flange plate is provided with a center through hole;
the first end of the oil pipe passes through the central through hole and is connected with the oil pipe head in a sealing way;
the first end of each sleeve is correspondingly provided with one sleeve head and is in sealing connection with the first end of the sleeve head; the second end of each casing head is in sealing connection with the flange plate;
the second sealing device includes: a plurality of quill bases;
the first end of the oil pipe seat is connected with the second end of the oil pipe in a sealing way;
the second end of each sleeve is correspondingly provided with a sleeve seat and is in sealing connection with the first end of the sleeve seat;
the second ends of the oil pipe seat and the second ends of the plurality of sleeve seats are sequentially and hermetically connected from inside to outside;
the flange plate is provided with a first test channel communicated with the first annular space and a sleeve test channel communicated with the sleeve annular space; an oil pipe test channel communicated with the oil pipe is arranged on the oil pipe head;
The test liquid outlet comprises an oil pipe test liquid outlet, a first test liquid outlet and a sleeve test liquid outlet;
the oil pipe test liquid outlet is arranged on the oil pipe head, and an oil pipe liquid outlet channel which is communicated with the inside of the oil pipe and the oil pipe test liquid outlet is arranged on the oil pipe head;
the first test liquid outlet and the sleeve test liquid outlet are respectively arranged on the flange plate, and the flange plate is provided with a first liquid outlet channel communicated with the first test liquid outlet and the first annular space and a sleeve liquid outlet channel communicated with the sleeve test liquid outlet and the sleeve annular space.
2. The casing annulus pressure simulation device of claim 1, wherein a strain gauge is mounted on an outer side surface of the outermost casing for detecting a deformation amount of the outermost casing.
3. The casing annulus pressure simulation device of claim 1, wherein the pressure sensors are disposed within the first test channel, the casing test channel, and the tubing test channel, respectively.
4. A casing annulus pressure simulation device according to claim 1, wherein,
an oil pipe air discharge port is also arranged on the oil pipe head, and an oil pipe air discharge channel which is communicated with the inside of the oil pipe and the oil pipe air discharge port is arranged in the oil pipe head;
The flange plate is also provided with a first air vent and a sleeve air vent; and the flange plate is also provided with a first air release channel communicated with the first air release port and the first annular space and a sleeve air release channel communicated with the sleeve air release port and the sleeve annular space.
5. A casing annulus pressure simulation device according to any of the claims 1-4, wherein,
the oil pipe seat includes: the oil pipe seat comprises an oil pipe seat body, a first seat body arranged at a first end of the oil pipe seat body and a second seat body arranged at a second end of the oil pipe seat body, wherein the diameter of the second seat body is larger than that of the oil pipe seat body; the second end of the oil pipe is sleeved on the outer side of the first seat body;
the sleeve seat comprises a sleeve seat body and a sleeve seat bulge arranged at the first end of the sleeve seat body; the second end of the sleeve is sleeved on the outer side of the sleeve seat bulge;
the oil pipe seat body and the sleeve seat bodies are sequentially and hermetically connected from inside to outside.
6. The casing annulus pressure simulator of claim 5 wherein,
the test liquid inlet comprises an oil pipe test liquid inlet, a first test liquid inlet and a sleeve test liquid inlet;
The second seat body is provided with a bottom joint, the oil pipe test liquid inlet is arranged on the bottom joint, and an oil pipe liquid inlet channel which is communicated with the inside of the oil pipe and the oil pipe test liquid inlet is arranged in the center parts of the bottom joint, the oil pipe seat body and the first seat body;
the first test liquid inlet is arranged on the second seat body, and a first liquid inlet channel which is communicated with a first annular space and the first test liquid inlet is arranged at the edge parts of the second seat body and the oil pipe seat body;
the casing test fluid inlet is arranged on the casing seat, and a casing fluid inlet channel which is communicated with the casing annulus and the casing test fluid inlet is arranged in the casing seat.
7. A casing annulus pressure simulation device according to any of claims 1-4, further comprising a data acquisition device and a hydraulic control device;
the data acquisition device is electrically connected with the pressure sensor;
the hydraulic control device is communicated with the test liquid outlet through a hydraulic backflow pipeline and is communicated with the test liquid inlet through a hydraulic liquid inlet pipeline.
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| CN112344988A (en) * | 2020-10-15 | 2021-02-09 | 南京航空航天大学 | Measuring device for oil pressure and temperature of inlet of squeeze film damper |
| CN113673126B (en) * | 2021-07-28 | 2024-02-13 | 中国石油大学(北京) | Method and device for calculating annular space pressure finite element of multilayer casing for well drilling |
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