CN201513131U - Tubular column for drilling plugs in well repairing - Google Patents
Tubular column for drilling plugs in well repairing Download PDFInfo
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- CN201513131U CN201513131U CN2009202222877U CN200920222287U CN201513131U CN 201513131 U CN201513131 U CN 201513131U CN 2009202222877 U CN2009202222877 U CN 2009202222877U CN 200920222287 U CN200920222287 U CN 200920222287U CN 201513131 U CN201513131 U CN 201513131U
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Abstract
A tubular column for drilling plugs in well repairing is applicable to drilling of cement plugs, bridge plugs and scaling objects on a well wall during oil and gas well completion construction. The tubular column mainly comprises an oil tube, a check valve, a screw drilling tool and a drilling bit or a grind shoe. The utility model is characterized in that the tubular column for the drilling plugs in the well repairing adopts a connection structure that the screw drilling tool is connected at the upper part of the drilling bit or the grind shoe from bottom to the top; the check valve is connected at the upper part of the screw drilling tool; the oil tube is connected at the upper part of the check valve; and the oil tube is right connected with a well mouth. The utility model has the benefits that the blockage of the water holes of the tubular column caused by the sedimentation of drilling cuttings can be avoided; the cycle time of well washing liquid can be saved, and the cost for plug drilling is reduced; when the tubular column is continuously connected with a single oil tube, a large number of drilling cuttings cannot be settled in an annulus, so that the sticking of the drilling tool can be avoided; the drilling cuttings cannot enter the screw drilling tool, so that the abrasion and the sticking of the drilling tool can be avoided to be stuck; and the well washing liquid cannot be ejected from the tubular column, so that the well mouth and the ground cannot be polluted.
Description
Technical field
The utility model relates in the construction of petroleum gas completion and the well-completing process technical field, and particularly a kind of underground work instrument is a kind of tubing string that is used for boring various cement plugs, bridging plug and borehole wall foulant except that the petroleum natural gas exploration well specifically.
Background technology
In the construction of petroleum natural gas exploration completion, the foulant on bridging plug, cement plug and the shaft in wall of oil gas water well inside is rotated brill removes, realize to the oil gas water well ordinary production it being indispensable step.Bore the brill plug tubing string that removes bridging plug, cement plug and borehole wall foulant at needs, present structure is:
1, tubular column structure comprises drill bit or junk mill+helicoid hydraulic motor+snubber+strainer+oil pipe from bottom to up, and this is the classical tubular column structure that a kind of minor repair well bores plug;
2, tubular column structure comprises drill bit+helicoid hydraulic motor+oil pipe from bottom to up, and this is the tubular column structure commonly used that a kind of minor repair well bores plug;
3, tubular column structure comprises drill bit, (drill collar), drilling rod from bottom to up, and this is the brill plug tubular column structure that a kind of needs are employed the well workover rig floor, the equipment of employing is more, cost is higher, belongs to typical rotary drilling, generally is used for big workover treatment.
Aforementioned two kinds of minor repair wells bore the plug tubing string, its basic principle is: tubing string is lowered in the pit shaft, the Ground Application pump truck pumps into drilling tool with flushing fluid, drives the helicoid hydraulic motor in shaft bottom and drives the drill bit rotary drilling, and the shaft bottom is bored the drilling cuttings that removes and returned out the arrival well head with flushing fluid and arrive ground.There is following defective in this brill plug:
Creep into from the drilling cuttings in shaft bottom will sneak into flushing fluid and thereupon by the shaft bottom on return well head, to ground.After finishing the creeping into an of tubing length, when continued access is single, need not termination of pumping to continue circulation, long period is carried out well-flushing, so that drilling cuttings returns out well to well head, ground, allow the consistent in density of the inside and outside flushing fluid of drilling tool in the pit shaft, and reach that internal and external pressure balance just can stop well-flushing and next root oil pipe of continued access continues to creep into.Otherwise, liquid in the annular space between drilling tool and the well, owing to having sneaked into drilling cuttings its density is increased, if stop circulation immediately, perhaps circulation does not thoroughly wash out well head with drilling cuttings and to ground, then annulus fluid will be back in the drilling tool rapidly under the effect of fluid density difference inside and outside drilling tool, in connecting the single process of oil pipe, the drilling cuttings precipitation is easy to cause the obstruction of drilling tool hydrophthalmia, increases to bore the plug difficulty, even causes to bore to fill in and fail midway, do over again.Bored an oil pipe circulation primary, undoubtedly the engineering time correspondingly longer, increase cost.In addition, flushing fluid refluxes, and has accelerated the speed that drilling cuttings sinks, also sand setting and cause bit freezing around drill bit easily; Enter the drilling cuttings of drilling tool, the turn on pump circulation time will enter the rotor that helicoid hydraulic motor increases its damage even stuck helicoid hydraulic motor with flushing fluid again, make to bore the plug failure; Flushing fluid refluxes and sprays drilling tool, and the ejection well head is sprayed onto ground, has both caused well head and surrounding environment thereof seriously polluted, influences well head workman's operation again, is increased in the operation easier and the labour intensity of well head; Under the cold season ambient conditions, bring harm more for when the flushing fluid of ejection freezes the ground safety work.
The utility model content
The purpose of this utility model is: provide a kind of well workover to bore the plug tubing string, and G.I.H, the foulant rotary drilling that can finish on the inner bridging plug of oil gas water well, cement plug and the shaft in wall removes.The intact back short time of single brill circulates immediately that termination of pumping makes up a joint, and shortens and bores the plug time; The liquid that stops annular space to be mixed with drilling cuttings refluxes and enters drilling tool, avoids drilling cuttings precipitation bit freezing, card helicoid hydraulic motor, avoids liquid ejection well head, ground, contaminated environment influence operation.
The technical solution adopted in the utility model is: the plug tubing string is bored in well workover, mainly form by oil pipe, ball-and-seat, helicoid hydraulic motor and drill bit or junk mill, it is characterized in that: the syndeton that the plug tubing string is bored in well workover is the top connecting screw rod drilling tool of drill bit or junk mill from bottom to top, the top of helicoid hydraulic motor connects ball-and-seat, ball-and-seat top connects oil pipe, and oil pipe is connected to well head always.Ball-and-seat bottom connecting screw rod drilling tool, after all cement plugs have bored in construction just well-flushing the drilling cuttings in the pit shaft is washed out, and can not adopt the mode of anti-flushing well.The screw rod bypass valve belongs to the part of helicoid hydraulic motor.
What described ball-and-seat adopted is back-washable well double seal ball-and-seat.
The operating principle that the plug tubing string is bored in this well workover is:
Consult Fig. 1.After putting in place under the tubing string, flushing fluid 9 enters in the tubing string from tubing string top 10, arrive back-washable well double seal ball-and-seat 2 along oil pipe 1 centre bore, back-washable well double seal ball-and-seat 2 is opened, continue descending arrival helicoid hydraulic motor 3, screw rod bypass valve 5 cuts out, again to descending startup helicoid hydraulic motor 3 rotations, drive the drill bit 4 or the junk mill rotation of helicoid hydraulic motor 3 bottoms, bore and remove cement plug 12.The drilling cuttings 8 that rotary drilling produces has been dashed the annular space 6 that enters between tubing string and the well by flushing fluid 9, on return arrival pit shaft 7, perhaps arrives well head 11 and flow to ground, thereby realization removes the brill of cement plug.When the degree of depth of having bored an oil pipe needs the continued access oil pipe, continue suitable small amount of recycled and can termination of pumping stop circulation, the high density flushing fluid that contains drilling cuttings is under the effect of tubing string inside and outside differential pressure, has the tendency that flows in the tubing string, and under the effect of back-washable well double seal ball-and-seat 2, can not flow in the tubing string, avoid the drilling cuttings precipitation to stop up the tubing string hydrophthalmia, saved circulation timei in a large number, reduce and bore the plug cost.When new oil pipe connects when finishing again the turn on pump circulation and creeping into, drilling cuttings is again along with flushing fluid 9 returns on continuing.So,, once drilling cuttings 8 circulations that produce are washed out well head 11 to ground, finish and bore the plug operation up to whole cement plugs 12 have been bored.
Consult Fig. 2.When special circumstances take place, when needing reverse well-flushing, can in tubing string, drop into a steel ball 13, rapidly it is sent to back-washable well double seal ball-and-seat 2, standby circulation port 14 is opened, can realize positive well-flushing, also can realize anti-flushing well.
The beneficial effects of the utility model: the plug tubing string is bored in the utility model well workover, can avoid the drilling cuttings precipitation to stop up the tubing string hydrophthalmia; Can save the circulation timei of flushing fluid, reduce and bore the plug cost; When the continued access oil pipe was single, drilling cuttings can not be deposited in the annular space in a large number, can avoid bit freezing; Drilling cuttings can not enter helicoid hydraulic motor, can avoid the wearing and tearing of helicoid hydraulic motor and stuck; Flushing fluid can not spray tubing string, can not pollute well head and ground.
Description of drawings
Fig. 1 is that plug tubular column structure generalized section is bored in the utility model well workover.
Fig. 2 is that the generalized section that the plug tubing string is realized forward and reverse well-flushing is bored in the utility model well workover.
Among the figure, 1. oil pipe, 2. ball-and-seat, 3. helicoid hydraulic motor, 4. drill bit, 5. by-pass valve of screwdrill, 6. annular space, 7. pit shaft, 8. drilling cuttings, 9. flushing fluid, 10. tubing string top, 11. well heads, 12. cement plugs, 13. steel balls, 14. circulation ports.
The specific embodiment
Embodiment 1: boring the plug tubing string with a cover well workover is example, and the utility model is described in further detail.
Consult Fig. 1.The plug tubing string is bored in the utility model well workover, mainly is made up of oil pipe 1, ball-and-seat 2, helicoid hydraulic motor 3 and drill bit 4.What ball-and-seat 2 adopted is back-washable well double seal ball-and-seat 2.It is the common oil recovery oil pipe of 73.02mm that oil pipe 1 adopts external diameter, and it is the straight helicoid hydraulic motor of 95mm that helicoid hydraulic motor 3 adopts external diameter, and it is the tricone bit of 114mm that drill bit 4 adopts external diameter.
Well workover bore the plug tubing string what connect bottom is that external diameter is the tricone bit 4 of 114mm, it is the straight helicoid hydraulic motor 3 of 95mm that the top of drill bit 4 connects external diameter, the top of straight helicoid hydraulic motor 3 connects back-washable well double seal ball-and-seat 2, it is the oil pipe 1 of 73.02mm that back-washable well double seal ball-and-seat 2 tops connect external diameter, and oil pipe 1 is connected to well head 11 always.
Embodiment 2: with embodiment 1 difference be: well workover bore the plug tubing string what is connected bottom is junk mill, the top connection external diameter of junk mill is the straight helicoid hydraulic motor 3 of 95mm.
Claims (2)
1. the plug tubing string is bored in a well workover, mainly form by oil pipe (1), ball-and-seat (2), helicoid hydraulic motor (3) and drill bit (4) or junk mill, it is characterized in that: the syndeton that the plug tubing string is bored in well workover is the top connecting screw rod drilling tool (3) of drill bit (4) or junk mill from bottom to top, the top of helicoid hydraulic motor (3) connects ball-and-seat (2), ball-and-seat (2) top connects oil pipe (1), and oil pipe (1) is connected to well head (11) always.
2. the plug tubing string is bored in well workover according to claim 1, it is characterized in that: what described ball-and-seat (2) adopted is back-washable well double seal ball-and-seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202222877U CN201513131U (en) | 2009-09-04 | 2009-09-04 | Tubular column for drilling plugs in well repairing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202222877U CN201513131U (en) | 2009-09-04 | 2009-09-04 | Tubular column for drilling plugs in well repairing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201513131U true CN201513131U (en) | 2010-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202222877U Expired - Fee Related CN201513131U (en) | 2009-09-04 | 2009-09-04 | Tubular column for drilling plugs in well repairing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201513131U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653136A (en) * | 2014-12-16 | 2015-05-27 | 中国石油天然气股份有限公司 | Method for drilling and grinding composite bridge plug by conventional oil pipe underground power |
| CN105683482A (en) * | 2013-08-23 | 2016-06-15 | 维拉国际工业有限公司 | Hybrid rotary cone drill bit |
| CN108756792A (en) * | 2018-05-25 | 2018-11-06 | 中国海洋石油集团有限公司 | A kind of deep sea drilling hydrophthalmia blocks monitoring and drilling pump damaging identification method |
| CN109899017A (en) * | 2019-03-20 | 2019-06-18 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Drilling and grinding underbalanced cement plug operation construction method for coiled tubing |
| CN111075362A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Fast plug drilling string and method |
| CN115613990A (en) * | 2022-12-15 | 2023-01-17 | 中国石油集团川庆钻探工程有限公司 | Full-switching reversible water hole grinding shoe |
-
2009
- 2009-09-04 CN CN2009202222877U patent/CN201513131U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105683482A (en) * | 2013-08-23 | 2016-06-15 | 维拉国际工业有限公司 | Hybrid rotary cone drill bit |
| CN104653136A (en) * | 2014-12-16 | 2015-05-27 | 中国石油天然气股份有限公司 | Method for drilling and grinding composite bridge plug by conventional oil pipe underground power |
| CN104653136B (en) * | 2014-12-16 | 2017-11-10 | 中国石油天然气股份有限公司 | Method for drilling and grinding composite bridge plug by conventional oil pipe underground power |
| CN108756792A (en) * | 2018-05-25 | 2018-11-06 | 中国海洋石油集团有限公司 | A kind of deep sea drilling hydrophthalmia blocks monitoring and drilling pump damaging identification method |
| CN108756792B (en) * | 2018-05-25 | 2020-06-02 | 中国海洋石油集团有限公司 | Deep sea drilling water hole blockage monitoring and drilling pump damage identification method |
| CN111075362A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Fast plug drilling string and method |
| CN109899017A (en) * | 2019-03-20 | 2019-06-18 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Drilling and grinding underbalanced cement plug operation construction method for coiled tubing |
| CN109899017B (en) * | 2019-03-20 | 2021-06-25 | 中国石油天然气集团有限公司 | Drilling and grinding underbalanced cement plug operation construction method for coiled tubing |
| CN115613990A (en) * | 2022-12-15 | 2023-01-17 | 中国石油集团川庆钻探工程有限公司 | Full-switching reversible water hole grinding shoe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100623 Termination date: 20100904 |