CN201106447Y - Underground pressure monitoring device for coal-bed gas well - Google Patents
Underground pressure monitoring device for coal-bed gas well Download PDFInfo
- Publication number
- CN201106447Y CN201106447Y CNU2007201901725U CN200720190172U CN201106447Y CN 201106447 Y CN201106447 Y CN 201106447Y CN U2007201901725 U CNU2007201901725 U CN U2007201901725U CN 200720190172 U CN200720190172 U CN 200720190172U CN 201106447 Y CN201106447 Y CN 201106447Y
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- Prior art keywords
- cable
- bed gas
- coal bed
- well
- test
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- Expired - Lifetime
Links
- 238000012806 monitoring device Methods 0.000 title claims abstract description 6
- 239000003245 coal Substances 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 20
- 238000007789 sealing Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001012 protector Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
A coal bed gas well underground pressure monitoring device relates to a coal bed gas well dynamic monitoring technology. The test instrument is characterized in that the upper end of the cable is connected with a hand-copy device socket, the cable is put into a shaft through a cable sealing head of a wellhead, and the cable and a production pipe are fixed together; the lower end of the production pipe is connected with a supporting cylinder through threads, an instrument cylinder and a connecting line sealer are fixed on the supporting cylinder, and a test instrument is arranged in the instrument cylinder. The device has the advantages that the device can be installed in the coal bed gas production well for a long time, underground pressure data can be obtained at any time by utilizing the hand-held device, and the use is very convenient. The device installs cable protector, line sealer, can protect the cable not damaged at the in-process of getting up down, can be for a long time in the steady operation in the pit, not influenced by well condition, and the data of surveying are accurate, also can the change of continuous test downhole pressure, utilize the device to test laborsaving saving time, practice thrift the expense.
Description
Technical field
The utility model relates to the coal bed gas well Dynamic Monitoring.
Background technology
The exploitation of coal bed gas is produced significant for safe coal.Coal-bed gas exploitation is a step-down recovery process, and accurately the pressure parameter at the bottom of the testing well is an important ring of guaranteeing the normal safety in production of coal bed gas well.At present, the well pressure measuring method of coal bed gas has indirectly testing method and direct method of testing.Again by calculating down-hole pressure, adopt this method all echometer will be installed on the well head behind the indirectly testing method employing ground echometer test dynamic oil level, workload is bigger at every turn, and its test errors is bigger, realizes that automation control difficulty is big.Directly method of testing adopts pressure bomb to measure down-hole pressure, promptly adopt test carriage with pressure gauge by cable or steel wire from sleeve pipe with produce under the annular space between the pipe test position of down-hole, after test finishes, pressure gauge is taken out from the down-hole, read data again by test carriage.This conventional pressure gauge is because sealing performance and transmission problem, can not be for a long time in underground work, and price is higher, therefore adopt the pressure of coal bed gas under this method testing well, equipment needed thereby is many, personnel are many, the expense height, and influenced greatly by hole condition, well head sealing difficulty, cause a hidden trouble to safety in production, the testing time is short, can not obtain the particulars in the long period section, this method of testing only is applicable to the coal bed gas well of test period long (as surveying once more than 10 days), can not reflect the down-hole pressure real-time change continuously, the data of being tested is not comprehensive, can not satisfy the needs of coal bed gas well down-hole pressure monitoring.
The utility model content
The purpose of this utility model provides a kind of coal bed gas well down-hole pressure monitoring device easy to use, and this device is installed in the well, can test the down-hole pressure of coal bed gas at any time.
Technical solution of the present utility model is to realize like this, a kind of coal bed gas well down-hole pressure monitoring device, constitute with the tester that the cable lower end is connected by cable, its special character is, (1) upper end of cable is connected with write by hand device socket, the cable seal head is installed on the well head by screw thread, and cable passes the cable seal head and is lowered in the pit shaft.(2) cable and production pipe are fixed together.(3) by spiral marking connection the holder tube is arranged producing the pipe lower end, be fixed with instrument tube and line sealer on the holder tube, tester is contained in the instrument tube.
The beneficial effects of the utility model are that (1) this device can be installed in the coal bed gas producing well for a long time, utilizes the write by hand device can obtain the down-hole pressure data at any time, install and use very convenient, do not need test carriage and many people to go up the well co-operate, time saving and energy saving, reduce expenses.(2) because this instrument is to be fixedly mounted on below the aerogenesis pump of down-hole, can directly record the situation of change of strata pressure, not be subjected to the influence of hole condition, the data that record are accurate, variation that also can the follow-on test down-hole pressure.(3) owing to the bigger special-purpose box cupling of diameter is arranged, when playing lower tubular column, can protect pressure gauge not broken or push in the upper end design of holder tube.Owing to after manometric output line and cable are connected firmly, this joint is in the line sealer, not influenced by mine gas, liquid etc., can guarantee for a long time at the down-hole steady operation.The cable protection device is installed protects cable in the process of removing, not to be damaged, can guarantee that test data is accurate.The cable seal device is installed, makes cable enter the well head place coal bed gas is leaked, ensure safety in production.
Description of drawings
Fig. 1 is that the utility model is installed in the schematic diagram in the coal bed gas pit shaft.
Fig. 2 is the cross-sectional view of cable seal head.
Fig. 3 be the line sealer partly cut open structural representation.
Fig. 4 is a holder tube schematic diagram.
Fig. 5 is the cross-sectional view of cable protection device.
The specific embodiment
Make the cable seal head, sealing drum 17 is welded on the short tube 18, short tube 18 two ends have screw thread, the middle part has through hole, pad 16, sealing block 15 are contained in the sealing drum 17, pressure cap 15, gland 13 are contained on the sealing drum 17 by screw thread respectively, and pad 16, sealing block 15, pressure cap 14, gland 13 middle parts all have through hole.
The line sealer is in the same place by spiral marking connection by last seal 21 and lower seal body 22, sealing ring is installed between them, in the vertebral foramen of last seal 21 and lower seal body 22, be separately installed with seal gasket 20,23, by screw thread upper pressing cap 19 is housed in last seal 21 upper ends, by screw thread lower pressing cap 24 is housed in the lower end of lower seal body 22.
Holder tube is made of by spiral marking connection special-purpose box cupling 25, holder cylindrical shell 26, tubing head 28 together, have circumferential groove and 4-6 cannelure on the special-purpose box cupling 25, holder cylindrical shell 26 is the less steel pipes of diameter, external diameter as special-purpose box cupling 25 is 108 millimeters, the diameter of holder cylindrical shell 26 is 50 millimeters, and instrument tube 27 welds or is screwed on holder cylindrical shell 26.
The cable protection device is bound up by pin 31 by 2 semicircular steel sheels 30, and liner 29,32 is housed in steel sheel 30, has longitudinal fluting on liner 29, selects the used cable protection device of oil well electric submersible pump in the present embodiment for use.
When instrument is lowered to pit shaft 5, at first will ask the lower end of tube 11 to connect mutually with screen casing 12, cable 3 is passed line sealer 9, tester 10 is selected the pressure bomb of minor diameter (as 25 millimeters of diameters) for use, after the output signal line of tester 10 and cable 3 be connected firmly, this joint is placed in the line sealer 9, the upper pressing cap 19 and the lower pressing cap 24 of line sealer 9 screwed, make its sealing.Tester 10 is contained in the instrument tube 27 that holds in the palm on the tube 11, line sealer 9 usefulness self-locking snap rings or fastening steel band are fixed on the holder tube 11, the self-locking snap ring selects for use intensity bigger.Cable 3 is contained in the cannelure of the special-purpose box cupling 25 that holds in the palm tube 11 upper ends, according to the gas production situation of well, holder tube 11 upper ends connect a gas production pump 8 (if gas production is enough big, also can without the gas production pump), gas production pump 8 tops connect to produce manages 4, produces pipe and is connected to well head always.Every about 10 meters; with 1 cable protection device 6 cable 3 and production pipe 4 are fixed together; cable 3 is stuck in liner 25 cannelures of cable protection device 6, in the middle of per 2 cable protection devices 6, with 3-5 self-locking snap ring 7 or fastening steel band cable 3 and production pipe 4 is fixed together again.Hole and write by hand device socket 1 that the upper end of cable 3 is passed in the cable seal head 2 link together.Pressure cap 15, gland 13 in the cable seal head 2 are screwed, make its sealing, can produce use.
Claims (1)
- A kind of coal bed gas well down-hole pressure monitoring device, the tester (10) that is connected with the cable lower end by cable (3) constitutes, it is characterized in that, the upper end of cable (3) is connected with write by hand device socket (1), cable seal head (2) is installed on the well head by screw thread, and cable (3) passes cable seal head (2) and is lowered in the pit shaft (5); Cable (3) and production pipe (4) are fixed together; By spiral marking connection holder tube (11) is arranged in production pipe (4) lower end, holder is fixed with instrument tube (27) and line sealer (9) on tin (11), and tester (10) is contained in the instrument tube (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201901725U CN201106447Y (en) | 2007-11-15 | 2007-11-15 | Underground pressure monitoring device for coal-bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201901725U CN201106447Y (en) | 2007-11-15 | 2007-11-15 | Underground pressure monitoring device for coal-bed gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201106447Y true CN201106447Y (en) | 2008-08-27 |
Family
ID=39958246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201901725U Expired - Lifetime CN201106447Y (en) | 2007-11-15 | 2007-11-15 | Underground pressure monitoring device for coal-bed gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201106447Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832127A (en) * | 2010-04-28 | 2010-09-15 | 中国科学院力学研究所 | Permanent pressure meter testing technique for coal bed gas observation well |
| CN102587899A (en) * | 2011-01-14 | 2012-07-18 | 中国石油天然气股份有限公司 | Method for testing liquid level of observation well of coal seam in-situ key parameters |
| CN104963645A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Cable-passing wellhead for intelligent separate injection of cables |
| CN105443113A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Test string for gas storage |
| CN105971589A (en) * | 2016-06-01 | 2016-09-28 | 中国地质大学（武汉） | Coalbed methane downhole pressure detection device |
| CN109236268A (en) * | 2017-06-30 | 2019-01-18 | 中国石油天然气股份有限公司 | Real-time monitoring device for underground injection flow and injection pressure |
| CN110644972A (en) * | 2019-11-07 | 2020-01-03 | 贵州航天凯山石油仪器有限公司 | Underground connection structure of layered oil production layered test system cable |
-
2007
- 2007-11-15 CN CNU2007201901725U patent/CN201106447Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832127A (en) * | 2010-04-28 | 2010-09-15 | 中国科学院力学研究所 | Permanent pressure meter testing technique for coal bed gas observation well |
| CN102587899A (en) * | 2011-01-14 | 2012-07-18 | 中国石油天然气股份有限公司 | Method for testing liquid level of observation well of coal seam in-situ key parameters |
| CN105443113A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Test string for gas storage |
| CN104963645A (en) * | 2015-06-16 | 2015-10-07 | 中国石油天然气股份有限公司 | Cable-passing wellhead for intelligent separate injection of cables |
| CN105971589A (en) * | 2016-06-01 | 2016-09-28 | 中国地质大学（武汉） | Coalbed methane downhole pressure detection device |
| CN105971589B (en) * | 2016-06-01 | 2019-04-02 | 中国地质大学（武汉） | Pressure-detecting device under a kind of coal bed gas well |
| CN109236268A (en) * | 2017-06-30 | 2019-01-18 | 中国石油天然气股份有限公司 | Real-time monitoring device for underground injection flow and injection pressure |
| CN110644972A (en) * | 2019-11-07 | 2020-01-03 | 贵州航天凯山石油仪器有限公司 | Underground connection structure of layered oil production layered test system cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080827 |