CN203231871U - High precision threaded connection sealing detection device - Google Patents
High precision threaded connection sealing detection device Download PDFInfo
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- CN203231871U CN203231871U CN 201320214626 CN201320214626U CN203231871U CN 203231871 U CN203231871 U CN 203231871U CN 201320214626 CN201320214626 CN 201320214626 CN 201320214626 U CN201320214626 U CN 201320214626U CN 203231871 U CN203231871 U CN 203231871U
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- valve body
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Abstract
The utility model discloses a high precision threaded connection sealing detection device which comprises an upper core shaft which is arranged along the vertical direction. The top end of the upper core shaft and the bottom end of an upper hanging head are in threaded connection. A first upper cone ring, a first rubber spring, a first lower cone ring, a first hard ring, a first rubber cylinder and an upper cylinder body are successively sleeved on the outer side wall of the upper core shaft from top to bottom. The bottom end of the upper cylinder body abuts against the shaft shoulder of the upper core shaft. An upper air pressure working chamber is arranged at the upper part in the upper cylinder body. The bottom end of the upper core shaft is fixedly connected with the top end of a valve body. The bottom end of the valve body is fixedly connected with the top end of a lower core shaft. A second upper cone ring, a second rubber spring, a second lower cone ring, a second hard ring, a second rubber cylinder and a lower cylinder body are successively sleeved on the outer side wall of the lower core shaft from top to bottom. The purpose is to provide the high precision threaded connection sealing detection device which has the advantages of convenient operation, rapid detection and high precision, and can directly detect a connected oil casing at a construction site.
Description
Technical field
The utility model relates to a kind of high precision screw and connects device for detecting sealability.
Background technology
In oil and gas industry, tubing string often will bear very high pressure as the space of oil gas circulation in high-pressure oil-gas well, so that the sealing between them seems is particularly important.Especially gasser, hydraulic oil sleeve pipe often need that after being connected to form tubing string the connecting filament buckle is carried out sealing and detect, in case the poorly sealed appearance thorn in a place leaks, will form great accident, and consequence is hardly imaginable.
The way that guarantees tubing string or string of casing and aid sealing in the prior art is: in the laboratory the pin thread of every oil pipe or sleeve pipe and box, be connected with pin thread with the box of standard respectively, set up confined space, in oil pipe or sleeve pipe confined space, inject a certain amount of high pressure detection gas, water submergence oil pipe or sleeve pipe or aid screw thread sealing more then.Detect qualified after, again oil pipe or sleeve pipe or aid are unloaded from joint, be transported to the working-yard respectively and use.In the working-yard, oil field, oil pipe or sleeve pipe or aid are joined together to form tubing string by root, so the said equipment can't be suitable at the scene, can only prove that the screwed connection when oil pipe or sleeve pipe dispatch from the factory is in the sealing of bearing under the authorised pressure.Even through detecting qualified tubing and casing, sealing after can not guaranteeing to connect at the scene, because tubing and casing may be in carrying from the connection procedure of the working-yard of dispatching from the factory, cause damage, the distortion of screw thread in the transportation, be lowered to colliding with of screw thread in the oil gas well process and underproof situation occurs sealing.
And at the scene the construction in for fear of the influence of above factor to the tubing string sealing, usually the way of taking is to have descended to adopt after the tubing and casing two shutoff to increase the setting-out equipment of pressing of spraining in the oil gas well to detect, if voltage stabilizing a period of time, pressure drop was arranged then sealing is defective, on the contrary then qualified.This equipment has two problems: the first, test medium and later stage Applicable media are different, and water-stop can not represent hermetic seal, the be far from precision height of gas pressure test leak-detecting of the precision of water pressure test leak-detecting; The second, descended pressure testing behind the tubing string, if seepage is arranged, be difficult to determine the position, even determine that the position also can't adopt remedial measures, can only trip out tubing string in the well and be lowered to again, and can not stop to be lowered to again the back seepage takes place.
The utility model content
It is a kind of easy to operate that the purpose of this utility model is to provide, and detects rapidly, and precision is higher, and can directly do the high precision screw connection device for detecting sealability of detection at the construction field (site) to the tubing and casing after connecting.
The utility model high precision screw connects device for detecting sealability, comprise the last mandrel that vertically arranges, the top of last mandrel adopts screw thread to link to each other with the bottom of last hanging head, be set with the first epicone circle on the lateral wall of last mandrel from top to bottom successively, first rubber spring, first time awl circle, first encircles firmly, first packing element and casing top half cylinder body, the bottom of casing top half cylinder body withstands on the shaft shoulder of mandrel, top in the casing top half cylinder body is provided with the pressure work chamber, paste mutually with the bottom of last locknut on the top of the first epicone circle, last locknut spinning is on described on the mandrel, the bottom of last mandrel and the top of valve body are fixedly linked, the bottom of valve body is fixedly linked with the top of following mandrel, be set with the awl circle on the lateral wall of following mandrel from top to bottom successively second time, second rubber spring, the second epicone circle, second encircles firmly, second packing element and following cylinder block, the top of following cylinder block withstands on down on the shaft shoulder of mandrel, bottom in the following cylinder block is provided with down the air pressure working chamber, paste mutually with the top of following locknut the bottom of second time awl circle, and following locknut spinning is on described mandrel down;
Described going up vertically is provided with the whole last center loading line of going up mandrel of perforation on the mandrel, the air intake opening place of last center loading line is installed with two male joints, the middle part of last center loading line communicates with last pressure work chamber, described mandrel down vertically is provided with down the center loading line, the middle part of following center loading line communicates with following air pressure working chamber, vertically be provided with the valve core case mounting hole on the described valve body, be provided with valve core case in the valve core case mounting hole, vertically be provided with the spool mounting hole on the valve core case, the bottom of spool mounting hole is cone angle truncated cone-shaped up, adopt clearance fit to be fitted with spool in the spool mounting hole, the bottom of spool is provided with the sealing cap of taper, the sidewall of sealing cap matches with the truncated cone-shaped hole of spool mounting hole bottom, paste mutually with the top of pressure spring the bottom of described spool, the bottom of pressure spring withstands on the interior step of described spool mounting hole, match with the bottom of adjusting gland in the top of described spool, adjust gland and adopt the top of spinning in the valve core case mounting hole that is threaded, adjust on the gland and vertically be provided with the through hole that is communicated with the spool top, middle part in the described valve core case mounting hole radially is provided with the center pit that penetrates described valve body, vertical direction is provided with more than one pressed gas passage on the described valve body, the top of described valve body is provided with upper chamber, upper chamber and last center loading line, through hole on the adjustment gland and the top of whole pressed gas passages communicate;
The bottom of described valve core case mounting hole is provided with the release obturating plug, discharge on the obturating plug and vertically be provided with through hole, the bottom that discharges in the through hole on the obturating plug is provided with the release plug, discharge beyond the Great Wall and movably be arranged in the cavity of bottom in the described valve body down, match with the inwall of described valve body in the bottom that discharges plug, paste mutually with the top of retracting spring the lower end that discharges plug, and the bottom of retracting spring withstands on the described valve body or the described top of mandrel down; Described valve body lower portion is provided with lower chamber, discharges the plug bottom and is provided with other tiltedly through hole, and described lower chamber communicates with the bottom of described pressed gas passage, the other tiltedly top of through hole, and other tiltedly through hole communicates with following center loading line gas circuit.
The utility model high precision screw connects device for detecting sealability, and the described mandrel position in pressure work chamber on described of going up is provided with radially casing top half cylinder body air-filled pore, and casing top half cylinder body air-filled pore is communicated with last center loading line; Described mandrel down is provided with following cylinder block air-filled pore radially in the described position of air pressure working chamber down, following cylinder block air-filled pore is communicated with following center loading line.
The utility model high precision screw connects device for detecting sealability, the bottom of described valve body links to each other with the described top of mandrel down by valve union and crossover sub, is equipped with axial center loading line in described valve union and the crossover sub and communicates with last center loading line, time center loading line gas circuit.
Described pair of male joint, valve core case, release obturating plug are equipped with O-ring seal outward, and the described upper and lower, pressure work chamber of going up is equipped with O-ring seal, and described air pressure working chamber upper and lower down also is equipped with O-ring seal.
The utility model high precision screw connects device for detecting sealability, and the described lower thread of mandrel down is connected with the tail cover, and the bottom of described tail cover is sealed.
Compared with prior art, the beneficial effects of the utility model are:
1) the utility model high precision screw connection device for detecting sealability only need link to each other and can use with the equipment that gases at high pressure are provided, convenient use at the construction field (site).
2) the utility model high precision screw connection device for detecting sealability can detect separately single screw connection point in the tubing and casing, and make after setting by first packing element 6 and second packing element, 21 pressurizeds and form confined space between the utility model pick-up unit and the tubing and casing inwall, gases at high pressure enter confined space from center pit 25 after continuing supercharging, whether can detect the screw connection point sealing after voltage stabilizing a period of time good, simple to operate, detect rapidly, precision is higher, avoid causing the problem of whole tubing and casing seal failure owing to the thread seal that is connected into certain pipe fitting in the tubing and casing loses efficacy, stopped potential safety hazard.
Below in conjunction with accompanying drawing the technical solution of the utility model is described further.
Description of drawings
Fig. 1 is the structural representation that high precision screw of the present utility model connects the embodiment of device for detecting sealability, and the right-hand member of the first half view among Fig. 1 and the left end of the latter half view are connected as one;
Fig. 2 is the enlarged drawing that high precision screw of the present utility model connects valve body part in the device for detecting sealability.
Embodiment
As shown in Figure 1, the utility model high precision screw connects device for detecting sealability, comprise the last mandrel 8 that vertically arranges, the top of last mandrel 8 adopts screw thread to link to each other with the bottom of last hanging head 1, be set with the first epicone circle 4 on the lateral wall of last mandrel 8 from top to bottom successively, first rubber spring 40, first time awl circle 41, the first hard ring 5, first packing element 6 and casing top half cylinder body 7, the bottom of casing top half cylinder body 7 withstands on the shaft shoulder of mandrel 8, top in the casing top half cylinder body 7 is provided with the pressure work chamber, paste mutually with the bottom of last locknut 3 on the top of the first epicone circle 4, last locknut 3 spinnings are on last mandrel 8, the top of the bottom of last mandrel 8 and valve body 9 is fixedly linked, the bottom of valve body 9 is fixedly linked with the top of following mandrel 19, be set with awl circle 42 on the lateral wall of following mandrel 19 from top to bottom successively second time, second rubber spring 24, the second epicone circle 23, the second hard ring 43, second packing element 21 and the following cylinder block 20, the top of following cylinder block 20 withstands on down on the shaft shoulder of mandrel 19, bottom in the following cylinder block 20 is provided with down the air pressure working chamber, paste mutually with the top of following locknut 44 bottom of second time awl circle 42, and following locknut 44 spinnings are on following mandrel 19;
Vertically be provided with on the last mandrel 8 and connect the whole last center loading line 45 of going up mandrel, the air intake opening place of last center loading line 45 is installed with two male joints 2, the middle part of last center loading line 45 communicates with last pressure work chamber, following mandrel 19 vertically is provided with down center loading line 33, the middle part of following center loading line 33 communicates with following air pressure working chamber, vertically be provided with valve core case mounting hole 47 on the valve body 9, be provided with valve core case 11 in the valve core case mounting hole 47, vertically be provided with the spool mounting hole on the valve core case 11, the bottom of spool mounting hole is cone angle truncated cone-shaped up, adopt clearance fit to be fitted with spool 12 in the spool mounting hole, the bottom of spool 12 is provided with the sealing cap of taper, the sidewall of sealing cap matches with the truncated cone-shaped hole of spool mounting hole bottom, paste mutually with the top of pressure spring 13 bottom of spool 12, the bottom of pressure spring 13 withstands on the interior step of spool mounting hole, match with the bottom of adjusting gland 10 in the top of spool 12, adjust gland 10 and adopt the top of spinning in the valve core case mounting hole that is threaded, adjust on the gland 10 and vertically be provided with the through hole that is communicated with the top of spool 12, middle part in the valve core case mounting hole 47 radially is provided with the center pit 25 that penetrates valve body 9, vertical direction is provided with more than one pressed gas passage 34 on the valve body 9, the top of valve body 9 is provided with upper chamber 38, upper chamber 38 and last center loading line 45, through hole on the adjustment gland 10 and the top of whole pressed gas passages 34 communicate;
The bottom of valve core case mounting hole 47 is provided with and discharges obturating plug 14, discharge on the obturating plug 14 and vertically be provided with through hole, the bottom that discharges in the through hole on the obturating plug 14 is provided with release plug 15, release plug 15 movably is arranged on up and down in the cavity of bottoms in the valve body 9, match with the inwall of valve body 9 in the bottom that discharges plug 15, paste mutually with the top of retracting spring 16 lower end that discharges plug 15, and the bottom of retracting spring 16 withstands on the valve body 9 or the top of following mandrel 19; Valve body 9 bottoms are provided with lower chamber 39, discharge plug 15 bottoms and are provided with other tiltedly through hole 35, and lower chamber 39 communicates with the bottom of pressed gas passage 34, the other tiltedly top of through hole 35, and other tiltedly through hole 35 communicates with following center loading line 33 gas circuits.
Last mandrel 8 is provided with casing top half cylinder body air-filled pore 36 radially in the position in last pressure work chamber, casing top half cylinder body air-filled pore 36 is communicated with last center loading line 45; Following mandrel 19 is provided with following cylinder block air-filled pore 48 radially in the position of following air pressure working chamber, following cylinder block air-filled pore 48 is communicated with following center loading line 33.
The bottom of valve body 9 links to each other with the top of crossover sub 18 with following mandrel 19 by valve union 17, is equipped with axial center loading line in valve union 17 and the crossover sub 18 and communicates with last center loading line 45, time center loading line 33 gas circuits.
The lower thread of following mandrel 19 is connected with tail cover 22, and the bottom of tail cover 22 is sealed.
Described pair of male joint 2, valve core case 11, release obturating plug 14 are equipped with O- ring seals 26,30,31 outward, and the described upper and lower, pressure work chamber of going up is equipped with O-ring seal 27,28, and described air pressure working chamber upper and lower down also is equipped with O-ring seal.
The utility model high precision screw connects the course of work of device for detecting sealability:
1) outside connecting portion to be detected, gas leakage detector is installed;
2) high precision screw of the present utility model is connected device for detecting sealability and be lowered in the tubing string, and make oil casing threaded junction to be detected just in time be between first packing element 6 and second packing element 21;
3) upwards inject detection gas in the center air-filled pore 45 by two male joints 2, detection gas is flowed through successively and is gone up the pressure work chamber, upper chamber 38, pressed gas passage 34, lower chamber 39, other tiltedly through hole 35, following center air-filled pore 33 and following air pressure working chamber, the detection gaseous tension that enter this moment is less, be not enough to open set and fill in 12, set plug and be in the state of setting, detect gas and enter pressure work chamber and following air pressure working chamber respectively by casing top half cylinder body air-filled pore 36 and following cylinder block air-filled pore 48, ever-increasing pressure promote casing top half cylinder body 7 and following cylinder block 20 respectively up and down two ends move, push first packing element 6 and second packing element 21 simultaneously, it is radially expanded under axle pressure, chucking tubing and casing inwall forms confined space, provides high-pressure space for the sealing that is threaded detects;
4) pressure that detects gas continues to increase, when acting on when setting the power that the power of plug on 12 is applied to it greater than pressure spring 13, setting plug 12 opens, detect gas and enter confined space by center pit 25, voltage stabilizing a period of time utilize the gas leakage detector of connection of thread outside to detect when detecting required force value to have or not gas to leak when the pressure that detects gas reaches.
5) lay down the detection gas in the whole piece passage after detection is finished, casing top half cylinder body 7 and following cylinder block 20 returns, first packing element 6 and second packing element, 21 returns, pick-up unit and measured oil casing wall break away from, and can take out, and wait for next time and detecting.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (4)
1. high precision screw connects device for detecting sealability, it is characterized in that: comprise the last mandrel (8) that vertically arranges, the top of last mandrel (8) adopts screw thread to link to each other with the bottom of last hanging head (1), be set with the first epicone circle (4) on the lateral wall of last mandrel (8) from top to bottom successively, first rubber spring (40), first time awl circle (41), first encircles (5) firmly, first packing element (6) and casing top half cylinder body (7), the bottom of casing top half cylinder body (7) withstands on the shaft shoulder of mandrel (8), top in the casing top half cylinder body (7) is provided with the pressure work chamber, paste mutually with the bottom of last locknut (3) on the top of the first epicone circle (4), last locknut (3) spinning is on described on the mandrel (8), the top of the bottom of last mandrel (8) and valve body (9) is fixedly linked, the bottom of valve body (9) is fixedly linked with the top of following mandrel (19), be set with second time awl circle (42) on the lateral wall of following mandrel (19) from top to bottom successively, second rubber spring (24), the second epicone circle (23), second encircles (43) firmly, second packing element (21) and following cylinder block (20), the top of following cylinder block (20) withstands on down on the shaft shoulder of mandrel (19), bottom in the following cylinder block (20) is provided with down the air pressure working chamber, paste mutually with the top of following locknut (44) bottom of second time awl circle (42), and following locknut (44) spinning is on described mandrel (19) down;
Described going up vertically is provided with the whole last center loading line (45) of going up mandrel of perforation on the mandrel (8), the air intake opening place of last center loading line (45) is installed with two male joints (2), the middle part of last center loading line (45) communicates with last pressure work chamber, described mandrel (19) down vertically is provided with down center loading line (33), the middle part of following center loading line (33) communicates with following air pressure working chamber, vertically be provided with valve core case mounting hole (47) on the described valve body (9), be provided with valve core case (11) in the valve core case mounting hole (47), valve core case vertically is provided with the spool mounting hole on (11), the bottom of spool mounting hole is cone angle truncated cone-shaped up, adopt clearance fit to be fitted with spool (12) in the spool mounting hole, the bottom of spool (12) is provided with the sealing cap of taper, the sidewall of sealing cap matches with the truncated cone-shaped hole of spool mounting hole bottom, paste mutually with the top of pressure spring (13) bottom of described spool (12), the bottom of pressure spring (13) withstands on the interior step of described spool mounting hole, match with the bottom of adjusting gland (10) in the top of described spool (12), adjust gland (10) and adopt the top of spinning in the valve core case mounting hole that is threaded, adjust on the gland (10) and vertically be provided with the through hole that is communicated with the top of spool (12), middle part in the described valve core case mounting hole (47) radially is provided with the center pit (25) that penetrates described valve body (9), described valve body (9) is gone up vertical direction and is provided with more than one pressed gas passage (34), the top of described valve body (9) is provided with upper chamber (38), upper chamber (38) and last center loading line (45), the top of the through hole on the adjustment gland (10) and whole pressed gas passages (34) communicates;
The bottom of described valve core case mounting hole (47) is provided with and discharges obturating plug (14), discharge on the obturating plug (14) and vertically be provided with through hole, the bottom that discharges in the through hole on the obturating plug (14) is provided with release plug (15), discharging plug (15) movably is arranged on up and down in the cavity of the interior bottom of described valve body (9), match with the inwall of described valve body (9) in the bottom that discharges plug (15), paste mutually with the top of retracting spring (16) lower end that discharges plug (15), and the bottom of retracting spring (16) withstands on the interior step of described valve body (9) or the described top of mandrel (19) down; Described valve body (9) bottom is provided with lower chamber (39), discharge plug (15) bottom and be provided with other tiltedly through hole (35), described lower chamber (39) communicates with the bottom of described pressed gas passage (34), the other tiltedly top of through hole (35), and other tiltedly through hole (35) communicates with following center loading line (33) gas circuit.
2. connect device for detecting sealability according to the described high precision screw of claim 1, it is characterized in that: described mandrel (8) position in pressure work chamber on described of going up is provided with radially casing top half cylinder body air-filled pore (36), and casing top half cylinder body air-filled pore (36) is communicated with last center loading line (45); Described mandrel (19) down is provided with following cylinder block air-filled pore (48) radially in the described position of air pressure working chamber down, following cylinder block air-filled pore (48) is communicated with following center loading line (33).
3. connect device for detecting sealability according to the described high precision screw of claim 2, it is characterized in that: the bottom of described valve body (9) links to each other by valve union (17) and crossover sub (18) top with described time mandrel (19), is equipped with axial center loading line in described valve union (17) and the crossover sub (18) and communicates with last center loading line (45), time center loading line (33) gas circuit.
4. connect device for detecting sealability according to the described high precision screw of claim 3, it is characterized in that: the described lower thread of mandrel (19) down is connected with tail cover (22), and the bottom of described tail cover (22) is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320214626 CN203231871U (en) | 2013-04-25 | 2013-04-25 | High precision threaded connection sealing detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320214626 CN203231871U (en) | 2013-04-25 | 2013-04-25 | High precision threaded connection sealing detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203231871U true CN203231871U (en) | 2013-10-09 |
Family
ID=49287991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320214626 Expired - Fee Related CN203231871U (en) | 2013-04-25 | 2013-04-25 | High precision threaded connection sealing detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203231871U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897345A (en) * | 2015-06-17 | 2015-09-09 | 贵州天义电器有限责任公司 | Universal clamp for detecting airtightness of sealed relay |
-
2013
- 2013-04-25 CN CN 201320214626 patent/CN203231871U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897345A (en) * | 2015-06-17 | 2015-09-09 | 贵州天义电器有限责任公司 | Universal clamp for detecting airtightness of sealed relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20180425 |