CN105319020A - Jacket-type oil casing air tightness detection device and detection method - Google Patents
Jacket-type oil casing air tightness detection device and detection method Download PDFInfo
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- CN105319020A CN105319020A CN201510672683.XA CN201510672683A CN105319020A CN 105319020 A CN105319020 A CN 105319020A CN 201510672683 A CN201510672683 A CN 201510672683A CN 105319020 A CN105319020 A CN 105319020A
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Abstract
The invention discloses a jacket-type oil casing air tightness detection device and a detection method. The jacket-type oil casing air tightness detection device comprises an upper end cover, an upper central pipe, an adjusting joint, a lower central pipe and a lower end cover. Through holes are formed in central positions of the upper central pipe and the lower central pipe and are connected through the adjusting joint. One side of the adjusting joint is provided with a first high-pressure soft pipe joint. The inner walls, provided with the through holes, of the upper central pipe and the lower central pipe and are provided with grooves, and glue cylinders and extruding mechanism are respectively arranged in the grooves. Each extruding mechanism comprises four extruding forks uniformly arranged on the periphery of the glue cylinder, one end of each extruding fork is in contact with the glue cylinder, the other end of the extruding fork extends out a side hole of the upper central pipe or the lower central pipe, and the extending-out part is sleeved by a spring. The tail part of the extending out par of each extruding fork is provided with a piston disk, a piston sleeve sleeves the outer part of the piston disk, the piston disk is connected with the piston sleeve in sliding sealing manner, and the end part of the piston sleeve is provided with a second high-pressure soft pipe joint. The jacket-type oil casing air tightness detection device and the detection method can effectively realize air tightness detection of a small-size oil casing, and the service lifetime of the glue cylinder is effectively prolonged.
Description
Technical field
The present invention relates to the device for detecting sealability technical field of tubing and casing connecting portion screw thread, be specifically related to a kind of jacket-type tubing and casing air-tightness detection device and detection method.
Background technology
China's natural gas market is expanded rapidly, is used widely in underground natural gas storage.Underground natural gas storage storage capacity is large, pressure regulation spectrum is large, with low cost, but injection-production well to compare conventional Productivity Construction producing well higher to pit shaft security, integrity demands, injection-production well is longer for working time.Because gas storage injection-production well operating pressure is high, pressure range is large, the leakage potential safety hazard that pit shaft security presence is larger.
Tubing and casing is due to mismachining tolerance, and colliding with in transport or operation process, microcorrosion, the wrong choice of stop-leak compound and use, torque wrench moment is unreasonable, and the factor such as clean of box cupling and sealing surface, very easily causes tubing and casing impermeability to lose efficacy.Gasser Leak in Oil Pipe in process of production, oil jacket may be caused to gang up, and pressure surge, affects casing safety, there are major safety risks, and later stage workover cost is huge, causes uncertain potential safety hazard to environment and society.In order to ensure the safety of completion tubular column in down-hole, propose higher seal request to the tubing and casing playing critical seal effect, the air-leakage test of tubing and casing screw thread has become the necessary means stopping potential safety hazard.
Along with the higher hyposmosis of cost, extra-low permeability gas field are in the exploitation gradually of China, the employing being conducive to the slim hole well reducing cost of winning is popularized gradually, tubing and casing caliber supporting with it also corresponding reduction.Because the air-tightness detection device adopted at present is all embedded, therefore the external diameter of air-tightness detection device also needs corresponding reduction to coordinate the caliber of tubing and casing, if air-tightness detection device still will keep original structure under undersized condition, realize original function, will greatly increase processing and manufacturing difficulty.
Summary of the invention
The object of the invention is to, for above-mentioned prior art Problems existing, provide a kind of jacket-type tubing and casing air-tightness detection device and detection method, structure is simple, detect simple and efficient, efficiently solve the problem of small size tubing and casing air-leakage test.
The present invention realizes like this, a kind of jacket-type tubing and casing air-tightness detection device, comprise the upper end cover set gradually from top to bottom, upper center tube, adjustment joint, lower center tube and bottom end cover, the upper end of described upper center tube is connected with upper end cover and is communicated with, the lower end of described lower center tube is connected with bottom end cover and is communicated with, described upper center tube and the center of lower center tube all offer through hole and are connected both realizations by adjustment joint and be communicated with, the side of adjustment joint is provided with the first high-pressure hose connector, described upper center tube and lower center tube are provided with groove on the inwall offering through hole, described upper center tube and lower center tube are provided with packing element and pressing mechanism in groove, described pressing mechanism comprises four of being evenly arranged at that the peripheral and one end of packing element contacts with packing element and extrudes and pitch, upper center tube with the sidewall of lower center tube offers respectively four side openings be communicated with groove, the other end of extruding fork stretches out the side opening of upper center tube and lower center tube and is set with spring in extension, the extruding tail end pitched in extension is connected with piston plate, the outer cover of piston plate is provided with piston bush, piston plate is connected by slipper seal with piston bush, and the end of piston bush is provided with the second high-pressure hose connector.
Feature of the present invention is also, extruding fork comprises fork arm and extruded wall, one end of fork arm is connected with extruded wall, the other end of fork arm stretch out upper center tube, lower center tube side opening and be connected with piston plate, extruded wall is the quadrant cylinder with certain wall thickness, is provided with gap between the adjacent extruded wall of the peripheral fork arm of packing element.
Feature of the present invention is also, be also provided with upper protective sleeve and lower protective sleeve in upper center tube and the lower center tube groove on through-hole wall, upper protective sleeve is arranged at the top of packing element, and lower protective sleeve is arranged at the bottom of packing element.
Feature of the present invention is also, described upper center tube and lower center tube are provided with boss in the below of piston bush, piston bush is played to supporting firm effect.
Feature of the present invention is also, described upper end cover is connected respectively by screw thread with lower center tube with upper center tube, bottom end cover, and upper end cover is provided with drop handle, and described upper protective sleeve and lower protective sleeve all adopt rubber to make.
Another technical scheme that the present invention adopts is, a kind of above-mentioned detection device that adopts carries out the bubble-tight detection method of tubing and casing, comprises the steps:
Step 1, pick-up unit is placed on the outside of tubing and casing to be detected, makes adjustment joint be in oil casing collar position;
Step 2, by the second high-pressure hose connector infusion high pressure liquid, liquid is by entering the chamber between piston bush and piston plate after the second high-pressure hose connector and side opening, continue pressurization, piston plate advances under pressure gradually, Compress Spring also promotes connected extruding fork and radially moves, and extruding fork extrudes packing element, and packing element is subject to Radial Loads and is compressed, packing element and tubing and casing outer wall are fitted set, between tubing and casing outer wall and pick-up unit, form annular sealed space;
Step 3, by the first high-pressure hose connector infusion gases at high pressure, gas is entered in the annular sealed space that pick-up unit and tubing and casing form by the first high-pressure hose connector, continues pressurization, makes gaseous tension be promoted to detected pressures;
Step 4, in the box cupling place installing gas detector of tubing and casing inside, by gas detecting instrument, the outer gas of tubing and casing to be measured to be detected, whether leak judge tubing and casing impermeability by detecting gases at high pressure;
Step 5, detected after, first the gases at high pressure of annular sealed space between pick-up unit and tubing and casing are discharged into, then pressure release is carried out to the chamber between piston bush and piston plate, pressure release back piston dish Rapid reset under the effect of spring force, and drive extruding fork to reset, packing element relies on its own resilient to reset, and pick-up unit returns to original operating state;
Step 6, by pick-up unit from tubing and casing outside take out.
The advantage that invention has and good effect are:
1, jacket-type tubing and casing air-tightness detection device provided by the invention and detection method, oil casing collar outside is placed in during work, whether leaked by detection gas and judge tubing and casing impermeability, detect simple and efficient, efficiently solve the problem of small size tubing and casing air-leakage test, simultaneously the more effective serviceable life that improve packing element.
2, tubing and casing gas tightness pick-up unit of the present invention, cost is lower, lightweight, be convenient to on-the-spot transport, carry, detect simple and quick, testing result is highly sensitive, reliable operation, whether long-time stability are high, effectively detect tubing and casing gas tightness and lost efficacy, guarantee the safety of oil and gas exploration and development process;
3, tubing and casing air-tightness detection method of the present invention, easy and simple to handle, can detect the gas tightness of tubing and casing quickly and easily, for more accurately judging that tubing and casing gas sealing ability provides a kind of detection approach newly, contribute to proposing measures to rectify and reform according to testing result for screw thread blow-by, guarantee the safety of oil and gas exploration and development process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the arrangement cut-open view extruding fork 9, packing element 8 and piston plate 11 in Fig. 1;
In figure, 1, upper end cover, 2, upper center tube, 3, adjustment joint; 4, lower center tube, 5, bottom end cover, 6, through hole, the 7, first high-pressure hose connector; 8, packing element, 9, extruding fork, 9-1, fork arm, 9-2, extruded wall; 10, spring, 11, piston plate, 12, piston bush; 13, the second high-pressure hose connector, 14, upper protective sleeve, 15, lower protective sleeve; 16, boss, 17, drop handle, 18, tubing and casing.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.
As depicted in figs. 1 and 2, a kind of jacket-type tubing and casing air-tightness detection device of the embodiment of the present invention, comprise the upper end cover 1 set gradually from top to bottom, upper center tube 2, adjustment joint 3, lower center tube 4 and bottom end cover 5, the upper end of upper center tube 2 is connected with upper end cover 1 and is communicated with, the lower end of lower center tube 4 is connected with bottom end cover 5 and is communicated with, upper center tube 2 and the center of lower center tube 4 all offer through hole 6 and are connected both realizations by adjustment joint 3 and be communicated with, upper center tube 2, lower center tube 4 is connected respectively threadably with adjustment joint 3, and ensure upper center tube 2 and the sealing adjusting joint 3 junction and lower center tube 4 and adjustment joint 3 junction, the side of adjustment joint 3 is provided with the first high-pressure hose connector 7, be used for being connected with high-pressure hose and for gases at high pressure being passed into the annular space between pick-up unit and tubing and casing 18.Upper center tube 2 and lower center tube 4 are provided with groove on the inwall offering through hole 6, and upper center tube 2 and lower center tube 4 are provided with packing element 8 and pressing mechanism in groove, pressing mechanism comprises four the extruding forks 9 being evenly arranged at the peripheral and one end of packing element 8 and contacting with packing element 8, upper center tube 2 offers four side openings be communicated with groove respectively with on the sidewall of lower center tube 4, the side opening that upper center tube 2 and lower center tube 4 sidewall are offered is uniformly distributed circumferentially respectively, the other end of extruding fork 9 stretches out the side opening of upper center tube 2 and lower center tube 4 and is set with spring 10 in extension, extruding fork 9 is connected with piston plate 11 in the tail end of extension, the outer cover of piston plate 11 is provided with piston bush 12, piston plate 11 is connected by slipper seal with piston bush 12, the end of piston bush 12 is provided with the second high-pressure hose connector 13, be used for being connected with high-pressure hose and chamber highly pressurised liquid imported between piston bush 12 and piston plate 11.
In embodiments of the present invention, extruding fork 9 comprises fork arm 9-1 and extruded wall 9-2, one end of fork arm 9-1 is connected with extruded wall 9-2, the other end of fork arm 9-1 stretches out upper center tube 2, the side opening of lower center tube 4 is also connected with piston plate 11, fork arm 9-1 and piston plate 11 are threaded connection, fork arm 9-1 and upper center tube 2, the side opening of lower center tube 4 matches, ensure that fork arm 9-1 can movement flexibly in side opening, extruded wall 9-2 is the quadrant cylinder with certain wall thickness, extruded wall 9-2 internal diameter is slightly less than packing element external diameter, gap is provided with between the adjacent extruded wall of the peripheral fork arm of packing element 8, this makes it possible to make extruding pitch 9 when extruding packing element 8, can not influence each other between adjacent extruded wall 9-2, better can contact packing element 8 outer wall, thus to its extruding.
As a prioritization scheme of the embodiment of the present invention, be also provided with upper protective sleeve 14 and lower protective sleeve 15 in upper center tube 2 and the groove of lower center tube 4 on through hole 6 inwall, upper protective sleeve 14 is arranged at the top of packing element 8, and lower protective sleeve 15 is arranged at the bottom of packing element 8.
As a prioritization scheme of the embodiment of the present invention, upper center tube 2 and lower center tube 4 are provided with boss 16 in the below of piston bush 12, piston bush 12 are played to supporting firm effect.
As a prioritization scheme of the embodiment of the present invention; upper end cover 1 is connected respectively by screw thread with lower center tube 4 with upper center tube 2, bottom end cover 5; upper end cover 2 is provided with drop handle 17; conveniently when operation, boom hoisting promotes this pick-up unit and transfers; upper protective sleeve 14 used and lower protective sleeve 15 all adopt rubber to make; after packing element 8 is compressed; further sealing function is played to the confined space that pick-up unit and tubing and casing 18 are formed; further ensure reliability and the accuracy of detection, improve the serviceable life of packing element simultaneously.
The bubble-tight detection method of tubing and casing of the present invention, adopts above-mentioned jacket-type tubing and casing air-tightness detection device to carry out, specifically carries out according to above step:
Step 1, pick-up unit is placed on the outside of tubing and casing 18 to be detected, make adjustment joint 3 be in oil casing collar position, ensure that the packing element 8 of upper center tube 2 is positioned at the top of box cupling, the packing element 8 of lower center tube 4 is positioned at the below of box cupling;
Step 2, by the second high-pressure hose connector 13 infusion high pressure liquid, liquid is by entering the chamber between piston bush 12 and piston plate 11 after the second high-pressure hose connector 13 and side opening, continue pressurization, piston plate 11 advances under pressure gradually, Compress Spring 10 also promotes connected extruding fork 9 and radially moves, extruding fork 9 pairs of packing elements 8 extrude, packing element 8 is subject to Radial Loads and is compressed, packing element 8 and tubing and casing 18 outer wall are fitted set, between tubing and casing 18 outer wall and pick-up unit, form annular sealed space;
Step 3, by the first high-pressure hose connector 7 infusion gases at high pressure, gas is entered in the annular sealed space that pick-up unit and tubing and casing 18 form by the first high-pressure hose connector 7, continues pressurization, makes gaseous tension be promoted to detected pressures;
Step 4, in the box cupling place installing gas detector of tubing and casing 18 inside, by gas detecting instrument, the outer gas of tubing and casing 18 to be measured to be detected, whether leak judge tubing and casing impermeability by detecting gases at high pressure;
Step 5, detected after, first pressure release is carried out to the annular sealed space that pick-up unit and tubing and casing 18 form, discharge into the gases at high pressure of annular sealed space between pick-up unit and tubing and casing 18, then pressure release is carried out to the chamber between piston bush 12 and piston plate 11, pressure release back piston dish 11 Rapid reset under the effect of spring 10 elastic force, and driving extruding fork 9 to reset, packing element 8 relies on its own resilient to reset, and pick-up unit returns to original operating state;
Step 6, by pick-up unit from tubing and casing outside take out.
In the detection method of the embodiment of the present invention, first high-pressure hose connector 7 can be connected with high-pressure air pipe, high-pressure air pipe is connected with high-pressure pump, high-pressure pump infusion be detect gases at high pressure, detect gases at high pressure and can be helium nitrogen mixture gas, and the second high-pressure hose connector 13 can be connected with high-pressure liquid tube, high-pressure liquid tube is connected with high pressure liquid pump, and the highly pressurised liquid of high pressure liquid pump infusion can be water.After connecting, lifting device can be utilized to be sling by pick-up unit of the present invention by the drop handle 17 that upper end cover 2 is installed, be inserted in the outside of tubing and casing, the air-leakage test of tubing and casing can be carried out according to the detection method of the invention described above.In the present invention, the effect of the second high-pressure hose connector 13 is for infusion highly pressurised liquid-water, but not gases at high pressure, and the highly pressurised liquid of infusion carries out from four direction, therefore, can extrude packing element 8 fast and uniformly, this makes it possible to ensure that packing element 8 can better realize setting with the laminating of tubing and casing 18, and the serviceable life of packing element 8 can be improved, in the present invention simultaneously, upper protective sleeve 14 and lower protective sleeve 15 is also provided with in upper center tube 2 and the groove of lower center tube 4 on through hole 6 inwall, such structural design, can make packing element 8 after being compressed, further sealing function is played to the confined space that pick-up unit and tubing and casing 18 are formed, further ensure reliability and the accuracy of detection, simultaneously because the upper and lower of packing element 8 is respectively arranged with upper protective sleeve 14 and lower protective sleeve 15, also protective effect is served to packing element 8, therefore the serviceable life of packing element is also further increased, thus be more conducive to the present invention and rely on and detect gases at high pressure and whether leak accurately, the impermeability of reliable judgement tubing and casing, ensure accuracy and the reliability of air-leakage test.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a jacket-type tubing and casing air-tightness detection device, it is characterized in that, comprise the upper end cover (1) set gradually from top to bottom, upper center tube (2), adjustment joint (3), lower center tube (4) and bottom end cover (5), the upper end of described upper center tube (2) is connected with upper end cover (1) and is communicated with, the lower end of described lower center tube (4) is connected with bottom end cover (5) and is communicated with, described upper center tube (2) all offers through hole (6) with the center of lower center tube (4) and is connected both realizations by adjustment joint (3) and is communicated with, the side of adjustment joint (3) is provided with the first high-pressure hose connector (7), described upper center tube (2) and lower center tube (4) are provided with groove on the inwall offering through hole (6), described upper center tube (2) and lower center tube (4) are provided with packing element (8) and pressing mechanism in groove, described pressing mechanism comprises four of being evenly arranged at that the peripheral and one end of packing element (8) contacts with packing element (8) and extrudes and pitch (9), upper center tube (2) offers four side openings be communicated with groove respectively with on the sidewall of lower center tube (4), the other end of extruding fork (9) stretches out the side opening of upper center tube (2) and lower center tube (4) and is set with spring (10) in extension, extruding fork (9) is connected with piston plate (11) in the tail end of extension, the outer cover of piston plate (11) is provided with piston bush (12), piston plate (11) is connected by slipper seal with piston bush (12), the end of piston bush (12) is provided with the second high-pressure hose connector (13).
2. a kind of jacket-type tubing and casing air-tightness detection device according to claim 1, it is characterized in that, described extruding fork (9) comprises fork arm (9-1) and extruded wall (9-2), one end of fork arm (9-1) is connected with extruded wall (9-2), the other end of fork arm (9-1) stretch out upper center tube (2), lower center tube (4) side opening and be connected with piston plate (11), extruded wall (9-2), for having the quadrant cylinder of certain wall thickness, is provided with gap between the adjacent extruded wall of packing element (8) peripheral fork arm.
3. a kind of jacket-type tubing and casing air-tightness detection device according to claim 1 and 2; it is characterized in that; upper protective sleeve (14) and lower protective sleeve (15) is also provided with in described upper center tube (2) and the groove of lower center tube (4) on through hole (6) inwall; upper protective sleeve (14) is arranged at the top of packing element (8), and lower protective sleeve (15) is arranged at the bottom of packing element (8).
4. a kind of jacket-type tubing and casing air-leakage test according to claim 3, it is characterized in that, described upper center tube (2) and lower center tube (4) are provided with boss (16) in the below of piston bush (12), piston bush (12) are played to supporting firm effect.
5. a kind of jacket-type tubing and casing air-leakage test dress according to claim 4; it is characterized in that; described upper end cover (1) is connected respectively by screw thread with lower center tube (4) with upper center tube (2), bottom end cover (5); upper end cover (2) is provided with drop handle (17), described upper protective sleeve (14) and lower protective sleeve (15) all adopt rubber to make.
6. adopt the arbitrary described pick-up unit of claim 1-5 to carry out the bubble-tight detection method of tubing and casing, it is characterized in that, comprise the steps:
Step 1, pick-up unit is placed on the outside of tubing and casing to be detected (18), makes adjustment joint (3) be in oil casing collar position;
Step 2, by the second high-pressure hose connector (13) infusion high pressure liquid, liquid is by entering the chamber between piston bush (12) and piston plate (11) after the second high-pressure hose connector (13) and side opening, continue pressurization, piston plate (11) advances under pressure gradually, Compress Spring (10) and promote connected extruding fork (9) radially move, extruding fork (9) extrudes packing element (8), packing element (8) is subject to Radial Loads and is compressed, packing element (8) and tubing and casing (18) outer wall are fitted set, annular sealed space is formed between outer wall and pick-up unit in tubing and casing (18),
Step 3, by the first high-pressure hose connector (7) infusion gases at high pressure, gas enters in the annular sealed space that pick-up unit and tubing and casing (18) form by the first high-pressure hose connector (7), continue pressurization, make gaseous tension be promoted to detected pressures;
Step 4, in the inner box cupling place installing gas detector of tubing and casing (18), by gas detecting instrument, tubing and casing to be measured (18) outer gas to be detected, whether leak judge tubing and casing impermeability by detecting gases at high pressure;
Step 5, detected after, first the gases at high pressure of annular sealed space between pick-up unit and tubing and casing (18) are discharged into, then pressure release is carried out to the chamber between piston bush (12) and piston plate (11), pressure release back piston dish (11) Rapid reset under the effect of spring (10) elastic force, and drive extruding fork (9) to reset, packing element (8) relies on its own resilient to reset, and pick-up unit returns to original operating state;
Step 6, by pick-up unit from tubing and casing outside take out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510672683.XA CN105319020B (en) | 2015-10-16 | 2015-10-16 | Jacket-type oil casing air tightness detection device and detection method |
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| CN201510672683.XA CN105319020B (en) | 2015-10-16 | 2015-10-16 | Jacket-type oil casing air tightness detection device and detection method |
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| CN109297643A (en) * | 2018-12-07 | 2019-02-01 | 力源液压系统（贵阳）有限公司 | A kind of pipeline sealing Withstand test device |
| CN112901138A (en) * | 2019-11-17 | 2021-06-04 | 中石化石油工程技术服务有限公司 | Sleeve air-tight seal detection device |
| CN116852399A (en) * | 2023-09-05 | 2023-10-10 | 陕西能控安远智能技术有限公司 | Multipurpose explosion-proof robot |
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| CN116852399A (en) * | 2023-09-05 | 2023-10-10 | 陕西能控安远智能技术有限公司 | Multipurpose explosion-proof robot |
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