CN104234650A - Casing lowering tool and method - Google Patents
Casing lowering tool and method Download PDFInfo
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- CN104234650A CN104234650A CN201410450002.0A CN201410450002A CN104234650A CN 104234650 A CN104234650 A CN 104234650A CN 201410450002 A CN201410450002 A CN 201410450002A CN 104234650 A CN104234650 A CN 104234650A
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- impeller
- sleeve pipe
- casing
- overcoat
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Abstract
The invention provides a casing lowering tool and a casing lowering method. The casing lowering tool comprises an impeller mechanism rotated by circulating fluid, and a casing shoe which is provided with a cutting edge and is connected with the impeller mechanism; the impeller mechanism comprises an impeller and a liquid inlet positioned in the lateral direction of the impeller; the liquid inlet is communicated with the impeller; when a casing is lowered, after a top connection is connected with the casing, the casing and the casing lowering tool are lowered; when the casing encounters resistance in the lowering process, the fluid is circulated to the casing lowering tool, and the fluid enters an inner cavity of an impeller bush through the liquid inlet, impacts impeller blades of the impeller in the lateral direction and pushes the impeller to rotate so as to drive the casing shoe to rotate until the resistance is removed. The casing lowering tool can effectively solve the problem that the casing is difficultly lowered caused by wellbore sand bridge and necking; moreover, the energy utilization rate of the fluid is high, and the casing lowering tool is simple in structure, easy to operate and low in cost.
Description
Technical field
The present invention relates to oil and gas well drilling field, especially a kind of will enter in bad hole under sleeve pipe, can effectively solve due to well sand bridge and necking down problem cause sleeve pipe transfer difficulty sleeve pipe transfer instrument and method.
Background technology
Necking down and the sand bridge problem of bad hole have had a strong impact on transferring of sleeve pipe, still there is sleeve pipe after conventional drifting and transfer problem not in place, drilling team usually needs to trip out sleeve pipe, again drifting again, again sleeve pipe is transferred, such one side considerably increases operating risk and cost, and on the other hand from theory, sleeve pipe does not allow repeatedly to go up shackle.
Although instrument transferred by existing sleeve pipe, the sand bridge problem run into when tubing string is transferred can be solved to a certain extent, its still exist efficiency low, do not possess reaming hole function, cannot the problems such as necking down be solved.
Summary of the invention
The object of this invention is to provide a kind of sleeve pipe and transfer instrument and method, with solve prior art exist cannot effectively solve because of well sand bridge and necking down problem cause sleeve pipe transfer difficulty defect.
For solving the problem, the present invention proposes a kind of sleeve pipe and transfers instrument, the described sleeve pipe instrument of transferring comprises the impeller mechanism rotated by circulation of fluid, and the casing shoe of the band cutting edge to be connected with described impeller mechanism, described impeller mechanism comprise impeller and be positioned at described impeller side to inlet opening, described inlet opening is connected with described impeller.
Instrument transferred by sleeve pipe as above, wherein, described sleeve pipe instrument of transferring also comprises the top connection be connected with described impeller mechanism, described impeller mechanism also comprises the overcoat be connected with described top connection, and the impeller set be sheathed in described overcoat, described impeller is located in described impeller set, described impeller is connected with described casing shoe, first fluid passage is formed between described impeller set and described overcoat, described inlet opening runs through the sidewall of described impeller set and is connected with described first fluid passage, described first fluid passage is connected with the centre bore of described top connection.
Instrument transferred by sleeve pipe as above, and wherein, the setting direction of described inlet opening and described impeller set are greater than 0 degree at the angle of the radial alignment at described inlet opening place, and are less than 90 degree.
Instrument transferred by sleeve pipe as above, wherein, forms meniscate described first fluid passage between the outer wall of described impeller set and the inwall of described overcoat.
Instrument transferred by sleeve pipe as above, wherein, described impeller mechanism also comprises point water pipe nipple between described top connection and described impeller set, described point of water pipe nipple is by the upper end closed of the inner chamber of described impeller set, form second fluid passage between described point of water pipe nipple and described overcoat, described second fluid passage is connected with the centre bore of described top connection with described first fluid passage, described second fluid passage.
Instrument transferred by sleeve pipe as above, wherein, forms meniscate described second fluid passage between the outer wall of described point of water pipe nipple and the inwall of described overcoat.
Instrument transferred by sleeve pipe as above, wherein, connecting short section is connected with between described impeller and described casing shoe, the centre bore of described connecting short section is connected with the centre bore of described impeller, alignment bearing is arranged with outside described connecting short section, be arranged with fixed cover between described alignment bearing and described overcoat, it is outside that described alignment bearing is fixed on described connecting short section by described fixed cover.
Instrument transferred by sleeve pipe as above, and wherein, described connecting short section is connected with described casing shoe by the transition pipe nipple stretching out described overcoat outside, and the centre bore of described transition pipe nipple is connected with the centre bore of described connecting short section.
Instrument transferred by sleeve pipe as above, and wherein, described casing shoe has radius of clean-up, and the radius of clean-up of described casing shoe is greater than the radius of described overcoat.
The present invention also provides a kind of sleeve pipe pay-off method transferring instrument for sleeve pipe as above, comprising: above described impeller mechanism after splicing sleeve, transfers described sleeve pipe and instrument transferred by described sleeve pipe; When described sleeve pipe transfer be hampered time, transfer tool cycle fluid to described sleeve pipe, fluid by the impeller blade of impeller described in described inlet opening lateral impact, and promotes described vane rotary, and then drives described casing shoe to rotate, till unblocking.
The feature of instrument and method transferred by sleeve pipe of the present invention and advantage is:
1, sleeve pipe transfer be hampered time, sleeve pipe of the present invention is adopted to transfer tool cycle fluid, the kinetic energy of fluid is converted to mechanical energy by impeller mechanism, and drive with the casing shoe of cutting edge relative to rotation of sleeve, without the need to tripping out sleeve pipe drifting, effectively can solve the sleeve pipe that well sand bridge and necking down cause and transferring difficult problem; Because inlet opening is positioned at the side direction of impeller, fluid enters rear direct impact impeller blade by inlet opening and promotes wheel rotation, effectively can improve the utilization rate of fluid energy; Because this casing shoe possesses reaming hole function, can effectively solve necking down problem.
2, sleeve pipe of the present invention transfers tool construction simply, and operating efficiency is high, easy to operate, and cost is low.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the sectional view that instrument transferred by sleeve pipe of the present invention;
Fig. 2 is the generalized section at A-A cutting line place in Fig. 1.
Critical element label declaration:
1 overcoat
11 impeller set 111 first fluid passage 112 inlet openings
12 impeller 121 outages
13 points of water pipe nipple 131 second fluid passages
2 casing shoe 3 top connection 4 connecting short sections
5 alignment bearing 6 fixed cover 7 transition pipe nipples
L radial alignment
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
As shown in Figure 1, the invention provides a kind of sleeve pipe and transfer instrument, comprise the impeller mechanism rotated by circulation of fluid, and the casing shoe 2 of the band cutting edge to be connected with impeller mechanism, casing shoe 2 rotates under the drive of impeller mechanism, wherein, this impeller mechanism comprises impeller 12 and is positioned at the inlet opening 112 of impeller 12 side direction, inlet opening 112 is connected with impeller 12, namely inlet opening 112 is positioned at the outside of impeller 12, and the space between inlet opening 112 with two impeller blades adjacent on impeller 12 is connected, when circulation of fluid, fluid enters the impeller blade on rear lateral impact impeller 12 by the inlet opening 112 being positioned at impeller 12 side direction, promote impeller 12 to rotate, and drive the casing shoe 2 be connected with impeller mechanism to rotate further, on casing shoe 2, the rotation of cutting edge can eliminate well sand bridge and necking down, solve the sleeve pipe caused by well sand bridge and necking down and transfer difficult problem, because fluid laterally enters rear direct impact impeller blade, greatly can improve the utilization rate of fluid energy.Impeller 12 wherein can be one, also can be arranged side by side multiple along the axis of impeller 12, and the impeller blade on each impeller 12 is such as 5, or arranges more multistage blade as required.
As Fig. 1, shown in Fig. 2, in a specific embodiment, sleeve pipe instrument of transferring also comprises and to be connected with impeller mechanism and to be positioned at the top connection 3 above impeller mechanism, impeller mechanism also comprises the overcoat 1 be connected with top connection 3, and the impeller set 11 be sheathed in overcoat 1, impeller 12 is located in impeller set 11, i.e. overcoat 1, impeller set 11, impeller 12 all has hollow and the inner chamber of both ends open, overcoat 1, the sheathed successively from outside to inside and concentric of impeller set 11 and impeller 12, overcoat 1 is connected to the below of top connection 3, impeller 12 is connected with casing shoe 2, first fluid passage 111 is formed between impeller set 11 and overcoat 1, the sidewall of inlet opening 112 perfoliate-leaf wheel case 11 and being connected with first fluid passage 111, namely in the annular space of inlet opening 112 between overcoat 1 and impeller 12, and be arranged on the sidewall of impeller set 11, first fluid passage 111 is connected with the centre bore of top connection 3, in addition, the upper end of impeller set 11 inner chamber and the upper end of impeller 12 inner chamber are not communicated with the centre bore of top connection 3, entered in the inner chamber of impeller set 11 and the inner chamber of impeller 12 by upper end to avoid fluid.When circulation of fluid, to enter in impeller set 11 from side direction and promote impeller 12 after fluid flows into first fluid passage 111, inlet opening 112 successively by the centre bore of top connection 3 and rotate.Wherein, overcoat 1 and top connection 3 are threaded connection, and the external diameter of top connection 3 is such as 178mm, and the upper end of top connection 3 has internal thread, by 7 " LTC (oval button) screw thread is connected with upper strata sleeve pipe.
As shown in Figure 2, in a feasible technical scheme, setting direction (length direction) and the impeller set 11 of inlet opening 112 are greater than 0 degree at the angle α of the radial alignment L at inlet opening 112 place, and be less than 90 degree, radial alignment L wherein refers to the horizontal line between the center of inlet opening 112 and the central axis of impeller set 11, in other words, setting direction (length direction) and the impeller set 11 of inlet opening 112 are greater than 0 degree at the angle of the tangential direction (tangent line) at inlet opening 112 place, and be less than 90 degree, the sheet body side surface of impeller blade is directly pointed in the direction of being flowed out by inlet opening 112 to make fluid, fluid directly acts on impeller blade and promotes wheel rotation, thus fluid dynamic energy is fully converted into the mechanical energy promoting impeller 12 and rotate, improve the utilization rate of fluid energy.Wherein, the concrete setting direction of inlet opening 112 is determined by the setting direction of impeller blade, in addition, because impeller blade is generally skewed in what open, preferably, the length direction of inlet opening is not set to the radial direction or tangential along impeller set, otherwise fluid cannot apply to impeller blade the power (or component) pointing to its rotation direction, and cannot promote impeller blade rotation.
Further, setting direction (length direction) and the impeller set 11 of inlet opening 112 are 30 degree ~ 60 degree at the angle α of the radial alignment L at inlet opening 112 place, the setting direction (length direction) of inlet opening 112 is 30 degree ~ 60 degree with impeller set 11 at the angle of the tangential direction (tangent line) at inlet opening 112 place in other words, to make fluid more directly act on impeller blade, improve the utilization rate of fluid energy further.
Wherein, the internal diameter of impeller set 11 is such as 126mm, can uniform 4 groups of inlet openings 112 vertically on the sidewall of impeller set 11, the spacing of such as two adjacent groups inlet opening 112 is 100mm, often organizing inlet opening 112 can be uniform two along the circumference of impeller set 11, and inlet opening 112 can be circular hole, and such as diameter is the circular hole of 15mm, but the quantity of inlet opening 112, arrangement mode, concrete shape and size all can be arranged as required, this present invention is not limited.
In addition, the lower end sidewall of impeller 12 also runs through and has outage 121, one end of outage 121 is connected with the annular space formed between impeller set 11 and impeller 12, the other end of outage 121 is connected with the centre bore of the centre bore of impeller 12 and casing shoe 2, being entered by inlet opening 112 for fluid and promote after impeller 12 rotates, the centre bore finally via outage 121, casing shoe 2 is discharged.
In addition, casing shoe 2 has radius of clean-up, the radius of clean-up of casing shoe 2 is greater than the radius of overcoat 1, maximum radius of clean-up when wherein the radius of clean-up of casing shoe 2 refers to casing shoe 2 rotary cutting, specifically, casing shoe 2 has the undergauge outer wall that upper end external diameter is greater than lower end external diameter, it is such as taper, and the external diameter of one end that casing shoe 2 is connected with impeller 12 is greater than the external diameter of casing shoe 2 other end, the outer wall of casing shoe 2 is inlaid with carbide alloy bar, to form cutting edge, maximum radius after casing shoe 2 inlays cutting edge is radius of clean-up, when casing shoe 2 rotates, cutting edge has reaming hole function, effectively can solve well necking down problem.
Again as shown in Figure 2, in the present embodiment, meniscate first fluid passage 111 is formed between the outer wall of impeller set 11 and the inwall of overcoat 1, such as, the shape of outer wall circumferentially in similar ellipse of impeller set 11, the inwall of overcoat 1 is circumferentially circular, i.e. relative two side contacts overcoat 1 inwalls of impeller set 11 outer wall, and just coordinates with overcoat 1 inwall the arcuation region forming similar crescent moon between the both sides contacted.First fluid passage 111 is designed to crescent, can meets physical dimension designing requirement, being convenient to processing, but being not limited to this, can be also that other shape is as circular passage etc. by first fluid channels designs.
As shown in Figure 1, impeller mechanism also comprises point water pipe nipple 13 between top connection 3 and impeller set 11, divide water pipe nipple 13 by the upper end closed of impeller set 11 inner chamber, also simultaneously by the upper end closed of impeller 12 inner chamber, be sheathed on and form second fluid passage 131 between water pipe nipple 13 and overcoat 1 dividing in overcoat 1, second fluid passage 131 is connected with the centre bore of top connection 3 with first fluid passage 111, second fluid passage 131.When circulation of fluid, fluid flows into second fluid passage 131, first fluid passage 111, inlet opening 112 pusher movable vane wheel 12 rotation successively by the centre bore of top connection 3, impeller 12 drives casing shoe 2 to rotate further, wherein divide water pipe nipple 13 for solid, can, by the upper end closed of impeller set 11 inner chamber, fluid be avoided to enter the inner chamber of impeller set 11 by the top of impeller set 11.
Wherein, form meniscate second fluid passage 131 between the outer wall of point water pipe nipple 13 and the inwall of overcoat 1, shape and the constituted mode of second fluid passage 131 and first fluid passage 111 are identical.Second fluid passage 131 is designed to crescent, can meets physical dimension designing requirement, being convenient to processing, but being not limited thereto, can be also that other shape is as circular passage etc. by second fluid channels designs.
In the embodiment shown in fig. 1, connecting short section 4 is connected with between impeller 12 and casing shoe 2, the centre bore of connecting short section 4 is connected with the centre bore of impeller 12, alignment bearing 5 is arranged with outside connecting short section 4, be arranged with fixed cover 6 between alignment bearing 5 and overcoat 1, it is outside that alignment bearing 5 is fixed on connecting short section 4 by fixed cover 6.
In addition, connecting short section 4 is connected with casing shoe 2 by the transition pipe nipple 7 stretching out overcoat 1 outside, and the centre bore of transition pipe nipple 7 is connected with the centre bore of connecting short section 4, and the centre bore of transition pipe nipple 7 is connected with the centre bore of casing shoe 2.
Specifically, the upper end of connecting short section 4 is provided with internal thread, and with the external screw thread bolt of impeller 12 lower end body, the lower end of connecting short section 4 is provided with external screw thread, and with the internal thread bolt of transition pipe nipple 7 upper end, the external screw thread of transition pipe nipple 7 lower end and the internal thread bolt of casing shoe 2 upper end, the upper end of fixed cover 6 is provided with external screw thread, and with the internal thread bolt of overcoat 1 lower end, connecting short section 4 outer wall is provided with an annular protrusion, the top of annular protrusion, bottom is respectively provided with an alignment bearing 5, alignment bearing 5 by the shoulder that fixed cover 6 inwall is arranged against fixing, alignment bearing 5 can adopt the alignment bearing with drilling tool powered by conventional energy.
The present invention also provides a kind of sleeve pipe pay-off method adopting above-mentioned sleeve pipe to transfer instrument, comprising: above impeller mechanism after splicing sleeve (being connected with sleeve pipe by top connection 3), transfers sleeve pipe and instrument transferred by sleeve pipe, when sleeve pipe transfer be hampered time, tool cycle fluid is transferred to sleeve pipe, such as fluid is mud, fluid displacement is 20-30L/S, fluid enters the impeller blade from lateral impact impeller 12 after the inner chamber of impeller set 11 by inlet opening 112, and promote impeller 12 and rotate, and then drive casing shoe 2 to rotate, when casing shoe 2 rotates, cutting edge on casing shoe 2 can be removed the sand bridge in well and realize expanding, persistent loop fluid is till unblocking, the sleeve pipe caused by well sand bridge and necking down can be solved and transfer difficult problem, sleeve pipe can be transferred smoothly, the flow path of fluid asks for an interview the arrows in Fig. 1.
Adopting sleeve pipe of the present invention to transfer tool and method, without the need to rotating whole completion tubular column string, the rotation of casing shoe 2 relative to sleeve pipe can be realized, thus effectively solve the well sand bridge and necking down problem that run into when transferring sleeve pipe, sleeve pipe of the present invention transfers tool construction simply, and operate simple and easy, cost is low.
The foregoing is only the schematic detailed description of the invention of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.And it should be noted that, each ingredient of the present invention is not limited in above-mentioned overall applicability, the each technical characteristic described in manual of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the present invention covers other relevant with this case inventive point in the nature of things and combines and embody rule.
Claims (10)
1. instrument transferred by a sleeve pipe, it is characterized in that, the described sleeve pipe instrument of transferring comprises the impeller mechanism rotated by circulation of fluid, and the casing shoe of the band cutting edge to be connected with described impeller mechanism, described impeller mechanism comprise impeller and be positioned at described impeller side to inlet opening, described inlet opening is connected with described impeller.
2. instrument transferred by sleeve pipe as claimed in claim 1, it is characterized in that, described sleeve pipe instrument of transferring also comprises the top connection be connected with described impeller mechanism, described impeller mechanism also comprises the overcoat be connected with described top connection, and the impeller set be sheathed in described overcoat, described impeller is located in described impeller set, described impeller is connected with described casing shoe, first fluid passage is formed between described impeller set and described overcoat, described inlet opening runs through the sidewall of described impeller set and is connected with described first fluid passage, described first fluid passage is connected with the centre bore of described top connection.
3. instrument transferred by sleeve pipe as claimed in claim 2, and it is characterized in that, the setting direction of described inlet opening and described impeller set are greater than 0 degree at the angle of the radial alignment at described inlet opening place, and are less than 90 degree.
4. instrument transferred by sleeve pipe as claimed in claim 2, it is characterized in that, forms meniscate described first fluid passage between the outer wall of described impeller set and the inwall of described overcoat.
5. instrument transferred by sleeve pipe as claimed in claim 2, it is characterized in that, described impeller mechanism also comprises point water pipe nipple between described top connection and described impeller set, described point of water pipe nipple is by the upper end closed of the inner chamber of described impeller set, form second fluid passage between described point of water pipe nipple and described overcoat, described second fluid passage is connected with the centre bore of described top connection with described first fluid passage, described second fluid passage.
6. instrument transferred by sleeve pipe as claimed in claim 5, it is characterized in that, forms meniscate described second fluid passage between the outer wall of described point of water pipe nipple and the inwall of described overcoat.
7. instrument transferred by sleeve pipe as claimed in claim 2, it is characterized in that, connecting short section is connected with between described impeller and described casing shoe, the centre bore of described connecting short section is connected with the centre bore of described impeller, alignment bearing is arranged with outside described connecting short section, be arranged with fixed cover between described alignment bearing and described overcoat, it is outside that described alignment bearing is fixed on described connecting short section by described fixed cover.
8. instrument transferred by sleeve pipe as claimed in claim 7, and it is characterized in that, described connecting short section is connected with described casing shoe by the transition pipe nipple stretching out described overcoat outside, and the centre bore of described transition pipe nipple is connected with the centre bore of described connecting short section.
9. instrument transferred by sleeve pipe as claimed in claim 2, and it is characterized in that, described casing shoe has radius of clean-up, and the radius of clean-up of described casing shoe is greater than the radius of described overcoat.
10. transfer a sleeve pipe pay-off method for instrument for the sleeve pipe described in any one of claim 1 to 9, it is characterized in that, described sleeve pipe pay-off method comprises: above described impeller mechanism after splicing sleeve, transfers described sleeve pipe and instrument transferred by described sleeve pipe; When described sleeve pipe transfer be hampered time, transfer tool cycle fluid to described sleeve pipe, fluid by the impeller blade of impeller described in described inlet opening lateral impact, and promotes described vane rotary, and then drives described casing shoe to rotate, till unblocking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410450002.0A CN104234650B (en) | 2014-09-04 | Sleeve pipe transfers instrument and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410450002.0A CN104234650B (en) | 2014-09-04 | Sleeve pipe transfers instrument and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104234650A true CN104234650A (en) | 2014-12-24 |
| CN104234650B CN104234650B (en) | 2017-01-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121554A (en) * | 2016-08-25 | 2016-11-16 | 天津立林石油机械有限公司 | Waterpower Dual Drive integrated rotating guide shoe |
| CN106223857A (en) * | 2016-08-24 | 2016-12-14 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of continuous circulating device of casing job and method |
| CN107013170A (en) * | 2017-05-26 | 2017-08-04 | 西南石油大学 | A kind of hydraulic rotary guide shoe |
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| EP1727960A1 (en) * | 2004-03-26 | 2006-12-06 | Downhole Products PLC | Downhole apparatus for mobilising drill cuttings |
| CN102434103A (en) * | 2011-09-30 | 2012-05-02 | 成都市兴岷江电热电器有限责任公司 | Two-in-one dual-effect rotatable sleeve hole expanding device |
| CN202560130U (en) * | 2012-04-17 | 2012-11-28 | 中国石油天然气股份有限公司 | Rotary jet-flow well flushing device |
| CN102913157A (en) * | 2012-11-08 | 2013-02-06 | 中国石油天然气集团公司 | Underground sleeve rotational flow guider |
| CN103806836A (en) * | 2012-11-13 | 2014-05-21 | 中国石油大学(北京) | Self-feeding rotary jet flow multi-hole spray nozzle |
| CN103967435A (en) * | 2014-05-21 | 2014-08-06 | 西南石油大学 | Coal-bed gas well bottom sand removing device |
| CN204113162U (en) * | 2014-09-04 | 2015-01-21 | 中国石油天然气集团公司 | Instrument transferred by sleeve pipe |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1727960A1 (en) * | 2004-03-26 | 2006-12-06 | Downhole Products PLC | Downhole apparatus for mobilising drill cuttings |
| CN102434103A (en) * | 2011-09-30 | 2012-05-02 | 成都市兴岷江电热电器有限责任公司 | Two-in-one dual-effect rotatable sleeve hole expanding device |
| CN202560130U (en) * | 2012-04-17 | 2012-11-28 | 中国石油天然气股份有限公司 | Rotary jet-flow well flushing device |
| CN102913157A (en) * | 2012-11-08 | 2013-02-06 | 中国石油天然气集团公司 | Underground sleeve rotational flow guider |
| CN103806836A (en) * | 2012-11-13 | 2014-05-21 | 中国石油大学(北京) | Self-feeding rotary jet flow multi-hole spray nozzle |
| CN103967435A (en) * | 2014-05-21 | 2014-08-06 | 西南石油大学 | Coal-bed gas well bottom sand removing device |
| CN204113162U (en) * | 2014-09-04 | 2015-01-21 | 中国石油天然气集团公司 | Instrument transferred by sleeve pipe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223857A (en) * | 2016-08-24 | 2016-12-14 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of continuous circulating device of casing job and method |
| CN106121554A (en) * | 2016-08-25 | 2016-11-16 | 天津立林石油机械有限公司 | Waterpower Dual Drive integrated rotating guide shoe |
| CN107013170A (en) * | 2017-05-26 | 2017-08-04 | 西南石油大学 | A kind of hydraulic rotary guide shoe |
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