CN104141467A - Tool special for fishing combination operation on tail pipe in coal-bed gas well and operation process by using tool - Google Patents
Tool special for fishing combination operation on tail pipe in coal-bed gas well and operation process by using tool Download PDFInfo
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- CN104141467A CN104141467A CN201410335824.4A CN201410335824A CN104141467A CN 104141467 A CN104141467 A CN 104141467A CN 201410335824 A CN201410335824 A CN 201410335824A CN 104141467 A CN104141467 A CN 104141467A
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- reducing head
- tail pipe
- bed gas
- tool
- gas well
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Abstract
The invention belongs to the technical field of complicated underground accidents in coal-bed gas wells and particularly relates to a tool special for fishing combination operation on a tail pipe in a coal-bed gas well and an operation process by using the tool. In order to solve the problem that sand burial of the conventional sectional operation hinders the implementation of a lifting procedure, the invention provides the tool special for fishing combination operation on the tail pipe in the coal-bed gas well and the operation process by using the tool. The special tool is of an integrated stepped structure, and comprises an end head, a primary reducing head and a secondary reducing head, which are sequentially reduced in diameter; a female buckle which is in matched connection with a male buckle of an oil pipe is arranged in the end head; the primary and secondary reducing heads are of thread structures; a transitional rod between the primary reducing head and the secondary reducing head is uniformly provided with a plurality of water holes around the axis of the transitional rod. The primary reducing head and the secondary reducing head of the special tool are respectively connected with a rock core sleeve, the tail pipe and a screen pipe, an operating procedure of lifting a string to replace a tap after sand wash is omitted, work hours are reduced, and the secondary sand burial on the tail pipe after suspended sand sinks is avoided.
Description
Technical field
The invention belongs to the technical field of the complicated down-hole accident of coal bed gas well, be specifically related to a kind of coal bed gas well tail pipe and salvage the extraordinary instrument of merging operation and operation technique thereof.
Background technology
In the pressure break operation of coal bed gas well, quartz sand 40-60 m is injected in single coal bed exploitation accumulation
3, multiple seam exploitation accumulation is injected quartz sand and is greater than 80 m
3.After coal bed gas well puts into production, part well is subject to original geological stress or the effect of row's drive, and quartz sand returns to be told to producing in pit shaft, causes the pump accident of burying.At present the means of conventional this accident of processing are that segmentation is salvaged: first utilize sleeve pipe to entangle accident head and wash by water downwards, make to bury on the sand grains of accident tail pipe and return; Then on, carry sleeve pipe, be lowered to screw tap union tail and screen casing and salvage.But while carrying out segmentation operation process, above carry sleeve pipe, be lowered to this operation of screw tap and need last 5 hours, after having caused sandinteeter to sink, the secondary sand of tail pipe is buried, cause and cannot salvage sand and bury tail pipe and screen casing.
Summary of the invention
When the present invention is intended to carry out segmental salvage for the tail pipe of coal bed gas well and screen casing, easily occur that secondary sand buries, cause and cannot salvage sand and bury the problem of tail pipe and screen casing, and then provide a kind of coal bed gas well tail pipe to salvage to merge the extraordinary instrument of operation and operation technique thereof.
The present invention adopts following technical scheme:
A kind of coal bed gas well tail pipe is salvaged and is merged the extraordinary instrument of operation, described extraordinary instrument is integral type hierarchic structure, comprise termination that diameter reduces successively, reducing head and secondary reducing head, in described termination, have the box being connected with oil pipe pin thread, reducing head and secondary reducing head are helicitic texture, on the transiting rod between reducing head and secondary reducing head, evenly have some hydrophthalmias around its axis.
The diameter of a described reducing head is 108mm.
The diameter of described secondary reducing head is 73mm.
Described box diameter is 73mm.
The operation technique step of utilizing above-mentioned extraordinary instrument to carry out fishing is:
A, the termination of this special type instrument is connected with oil pipe pin thread, one time reducing head is connected with core sleeve pipe, and makes accident headgear in well in core sleeve pipe;
The pump that b, utilization are connected with core sleeve pipe, to underground water-injection, makes to return on the sand grains in core sleeve pipe, exposes tail pipe and screen casing;
C, continue to transfer this special type instrument, secondary reducing head be connected with tail pipe and screen casing, and on carry this special type instrument, salvage tail pipe and screen casing, when salvaging, return water sand return by hydrophthalmia.
The present invention has following beneficial effect:
The present invention utilizes special secondary reducing band hydrophthalmia catcher, realize the merging operation that coal bed gas is dragged for the hydraulic sand washing of pump workover treatment and above put forward operation, not only solve former segmentation production sand and buried a difficult problem of proposing operation enforcement in obstruction, also reduced man-hour simultaneously, effectively improved operating efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of extraordinary instrument of the present invention;
Fig. 2 is the working state figure of extraordinary instrument of the present invention;
In figure: 1-box, 2-termination, reducing head of 3-, 4-hydrophthalmia, bis-reducing heads of 5-, 6-oil pipe pin thread, 7-core sleeve pipe, 8-tail pipe, 9-screen casing, 10-sand grains.
Detailed description of the invention
By reference to the accompanying drawings, the specific embodiment of the present invention is described further:
As shown in Figure 1, a kind of coal bed gas well tail pipe is salvaged and is merged the extraordinary instrument of operation, described extraordinary instrument is integral type hierarchic structure, comprise termination that diameter reduces successively 2, reducing head 3 and a secondary reducing head 5, in described termination 2, have the box 1 being connected with oil pipe pin thread 6, reducing head 3 and secondary reducing head 5 are helicitic texture, on the transiting rod between reducing head 3 and secondary reducing head 5, evenly have some hydrophthalmias 4 around its axis.
When occurring in coal bed gas well burying after pump accident, the oil pipe pin thread 6 that is first 73mm by the termination of this special type instrument 2 with diameter is connected, and one time reducing head 3 is connected with the core sleeve pipe 7 of diameter 108mm, and makes accident headgear in well in core sleeve pipe 7.
Utilize the pump being connected with core sleeve pipe 7 to underground water-injection, make to return on the sand grains in core sleeve pipe 7, expose tail pipe 8 and screen casing 9.
Continue to transfer this special type instrument, secondary reducing head 5 be connected with tail pipe 8 and the screen casing 9 of diameter 73mm, and on carry this special type instrument, salvage tail pipe 8 and screen casing 9, when salvaging, return water sand return by hydrophthalmia 4.
Utilize a reducing head 3 of this special type instrument to be connected with core sleeve pipe 7, tail pipe 8 and screen casing 9 respectively with secondary reducing head 5, save the flow chart of upper lifting pipe post replacing screw tap after sand washing, save 5 man-hours, after having avoided sandinteeter to sink, the secondary sand of tail pipe has been buried.And in salvaging process, return water sand return by hydrophthalmia 4, operation is proposed on sand washing limit in limit, finally completes the fishing that sand is buried to tail pipe and screen casing.
Claims (5)
1. a coal bed gas well tail pipe is salvaged and is merged the extraordinary instrument of operation, it is characterized in that: described extraordinary instrument is integral type hierarchic structure, comprise termination (2), a reducing head (3) and secondary reducing head (5) that diameter reduces successively, in described termination (2), have the box (1) being connected with oil pipe pin thread (6), a reducing head (3) and secondary reducing head (5) are helicitic texture, on the transiting rod between a reducing head (3) and secondary reducing head (5), evenly have some hydrophthalmias (4) around its axis.
2. coal bed gas well tail pipe according to claim 1 is salvaged and is merged the extraordinary instrument of operation, it is characterized in that: the diameter of a described reducing head (3) is 108mm.
3. coal bed gas well tail pipe according to claim 1 is salvaged and is merged the extraordinary instrument of operation, it is characterized in that: the diameter of described secondary reducing head (5) is 73mm.
4. coal bed gas well tail pipe according to claim 1 is salvaged and is merged the extraordinary instrument of operation, it is characterized in that: described box (1) diameter is 73mm.
5. utilize coal bed gas well tail pipe described in claim 1 to salvage to merge the operation technique step of the extraordinary instrument of operation to be:
A. the termination of this special type instrument (2) are connected with oil pipe pin thread (6), a reducing head (3) is connected with core sleeve pipe (7), and makes accident headgear in well in core sleeve pipe (7);
B. utilize the pump being connected with core sleeve pipe (7) to underground water-injection, make to return on the sand grains in core sleeve pipe (7), expose tail pipe (8) and screen casing (9);
C. continue to transfer this special type instrument, secondary reducing head (5) be connected with tail pipe (8) and screen casing (9), and on carry this special type instrument, salvage tail pipe (8) and screen casing (9), when salvaging, return water sand return by hydrophthalmia (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335824.4A CN104141467B (en) | 2014-07-16 | 2014-07-16 | Coal bed gas well tail pipe, which is salvaged, merges operation Special Tool and its operation technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335824.4A CN104141467B (en) | 2014-07-16 | 2014-07-16 | Coal bed gas well tail pipe, which is salvaged, merges operation Special Tool and its operation technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104141467A true CN104141467A (en) | 2014-11-12 |
| CN104141467B CN104141467B (en) | 2017-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410335824.4A Active CN104141467B (en) | 2014-07-16 | 2014-07-16 | Coal bed gas well tail pipe, which is salvaged, merges operation Special Tool and its operation technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104141467B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863537A (en) * | 2015-05-12 | 2015-08-26 | 山西蓝焰煤层气集团有限责任公司 | Intermediate casing recovering and connecting device passing through mined-out region and recovery process |
| CN106481281A (en) * | 2015-08-25 | 2017-03-08 | 中国石油天然气股份有限公司 | Tubular column structure and coal bed gas well system of coal bed gas well |
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| US1653094A (en) * | 1925-12-23 | 1927-12-20 | William J Hay | Jar for fishing and drilling tools |
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| CN102953701A (en) * | 2012-11-15 | 2013-03-06 | 中国石油集团西部钻探工程有限公司 | Fishing head of conically spherical pilot bit type drilling tool |
| CN203394397U (en) * | 2013-08-07 | 2014-01-15 | 中国石油化工股份有限公司 | Underground multifunctional sand washing processor |
| CN204082066U (en) * | 2014-07-16 | 2015-01-07 | 山西蓝焰煤层气集团有限责任公司 | Coal bed gas well tail pipe is salvaged and is merged operation Special Tool |
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2014
- 2014-07-16 CN CN201410335824.4A patent/CN104141467B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1653094A (en) * | 1925-12-23 | 1927-12-20 | William J Hay | Jar for fishing and drilling tools |
| US5348086A (en) * | 1992-10-05 | 1994-09-20 | Trout Randall L | Combination downhole tool |
| CN2517866Y (en) * | 2001-11-17 | 2002-10-23 | 田庆国 | Reversible well-flushing appts. |
| CN2578514Y (en) * | 2002-11-11 | 2003-10-08 | 大庆石油管理局 | Soft substance fishing gear in oil well |
| US20040188085A1 (en) * | 2003-03-27 | 2004-09-30 | Tillett Ray O. | Downhole jarring tool adjuster |
| CN201083100Y (en) * | 2007-10-11 | 2008-07-09 | 中国海洋石油总公司 | Casing milling salvaging adaptor for oil well |
| CN201116458Y (en) * | 2007-11-30 | 2008-09-17 | 辽河石油勘探局 | Sand flushing reducing fishing spear |
| CN201363116Y (en) * | 2009-03-20 | 2009-12-16 | 贾延锋 | Integrated process device for sand removal and fishing outside pipe |
| CN201705259U (en) * | 2010-06-10 | 2011-01-12 | 中国石油化工集团公司 | Casing damage cell naked eye sleeve taking and replacing circulating device |
| CN202064852U (en) * | 2011-05-27 | 2011-12-07 | 中国石油集团川庆钻探工程有限公司川东钻探公司 | Multi-purpose safety joint |
| CN202578612U (en) * | 2012-05-10 | 2012-12-05 | 中国有色金属长沙勘察设计研究院有限公司 | Downhole latch jack |
| CN102953701A (en) * | 2012-11-15 | 2013-03-06 | 中国石油集团西部钻探工程有限公司 | Fishing head of conically spherical pilot bit type drilling tool |
| CN203394397U (en) * | 2013-08-07 | 2014-01-15 | 中国石油化工股份有限公司 | Underground multifunctional sand washing processor |
| CN204082066U (en) * | 2014-07-16 | 2015-01-07 | 山西蓝焰煤层气集团有限责任公司 | Coal bed gas well tail pipe is salvaged and is merged operation Special Tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863537A (en) * | 2015-05-12 | 2015-08-26 | 山西蓝焰煤层气集团有限责任公司 | Intermediate casing recovering and connecting device passing through mined-out region and recovery process |
| CN106481281A (en) * | 2015-08-25 | 2017-03-08 | 中国石油天然气股份有限公司 | Tubular column structure and coal bed gas well system of coal bed gas well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104141467B (en) | 2017-12-22 |
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