CN210105753U - Expansion suspension type tail pipe drilling operation device - Google Patents
Expansion suspension type tail pipe drilling operation device Download PDFInfo
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- CN210105753U CN210105753U CN201920108977.3U CN201920108977U CN210105753U CN 210105753 U CN210105753 U CN 210105753U CN 201920108977 U CN201920108977 U CN 201920108977U CN 210105753 U CN210105753 U CN 210105753U
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Abstract
The utility model provides an expansion suspension type tail pipe drilling operation device, which mainly comprises a tail pipe drilling component, an inner pipe drilling component and an expansion suspension component; the tail pipe drilling assembly comprises an auxiliary reaming drill bit, a reaming driving mechanism, a rotary sealing mechanism and the like; the inner pipe drilling assembly mainly comprises a reaming-while-drilling drill bit, a bottom drilling tool assembly, an anchoring mechanism, a motor, a central pipe, an inner pipe and the like, and the expansion suspension assembly mainly comprises an expansion hanger, an expansion cone, a sealing plug, a tail pipe, a pressure transmission mechanism and the like. The device can perform tail pipe guiding drilling operation, realizes rotary guiding drilling and measurement while drilling, the inner pipe drilling assembly is completely recycled at one time, the tail pipe can be used as a technical casing for well completion, conditions are provided for subsequent drilling, the problems of leakage, unstable well bore and the like are solved, and the mode of tail pipe connection back and open hole plugging is realized to seal complex layers, so that underground accidents are reduced, and the drilling safety is improved.
Description
Technical Field
The utility model relates to a drilling and completion technical field of oil and gas trade can realize tail pipe drilling operation and the downhole device of inflation suspension operation, especially an inflation suspension type tail pipe drilling operation device.
Background
The tail pipe drilling technology is a drilling technology which is characterized in that after a certain well depth is drilled by a conventional drilling process, a drill pipe is connected with a tail pipe drilling system for drilling, after drilling is completed, well cementation is carried out, the drill pipe is pulled out, and a tail pipe is left in the well, and is an international advanced new drilling technology. The paper tail pipe drilling technology and application thereof published in oil drilling technology 2003, 31, volume 2 introduces the current situation and application situation of foreign tail pipe drilling technology; patent 200810137580.3 discloses a tail pipe drilling and completion process, but the inner diameter of the tail pipe drilling and completion of complex layers in deep wells and ultra-deep wells is small, and the structure of the used tail pipe hanger is complex, so that great risk is brought to the construction of tail pipe drilling and well completion; patent 201510655103.6 discloses an expansion type tail pipe drilling operation device and an operation method thereof, wherein the expansion type tail pipe drilling operation device comprises a tail pipe drilling assembly, a tail pipe connecting and starting assembly and a tail pipe expansion assembly, wherein the tail pipe drilling assembly is a drilling tool part extending out of a bottom tail pipe and comprises a bi-center reaming bit, a sealed central pipe, a float collar and a ball seat, wherein the bi-center reaming bit, the sealed central pipe and the float collar and the ball seat are sequentially connected from bottom to top; the tail pipe connecting and starting assembly is connected between the tail pipe expansion assembly and the tail pipe drilling assembly and consists of an inner pipe column and an outer pipe column which are sleeved; wherein, the inner tube post includes: the sealing device comprises a spline shaft connected with a sealing central pipe through a shear pin, a central pipe connected with the spline shaft, and an expansion cone arranged above the spline shaft, wherein a sealing head is arranged at the upper part of the sealing central pipe, and a spline head is arranged outside the spline shaft; the outer tubing string comprises: the expansion starter is connected with the expansion sleeve, the locking short section and the hollow reaming bit are connected below the expansion starter, the lower part of the locking short section is provided with a shearing seat in blocking fit with a sealing head at the upper part of the sealing central tube, the sealing head and the locking short section form axial sliding sealing fit, the upper part of the locking short section is provided with a spline groove in sliding fit with a spline head outside a spline shaft, and an expansion cone surface of the expansion starter form sealing fit; the tail pipe expansion assembly is positioned at the upper part of the tail pipe drilling operation device and comprises an expansion casing pipe, an expansion hanger solidified outside the expansion casing pipe, an expansion bell mouth connected to the top of the expansion casing pipe and a central pipe penetrating through the expansion bell mouth and downwards connected with the spline shaft. The device and the method combine the tail pipe drilling and the expansion casing into one implementation, but only realize the recovery of the expansion pipe column, and the tail pipe drilling pipe column is permanently left at the bottom of a well and is a disposable tail pipe drilling and well completion device. The above-mentioned tail pipe drilling technology adopts the tail pipe as the completion tail pipe to perform the completion operation, is difficult to perform the rotary steering drilling and measurement while drilling, cannot perform the subsequent drilling operation, and cannot serve as the technical casing to seal off the stratum.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an inflation suspension type tail pipe well drilling operation device to the difficult problem that current tail pipe well drilling faced. The utility model discloses not only combine inflation hanger technique and tail pipe drilling technique together organically, can install on the drilling tool of bottom and carry out the rotation direction well drilling with the measurement equipment to can realize carrying out the inflation and hanging the operation after the drilling operation is accomplished to the tail pipe, sit and hang the disposable recovery of back inner tube, can continue to creep into after can filling up the technical casing and sealing off complicated stratum.
In order to solve the technical problem, the utility model discloses a realize through adopting following technical scheme mode:
an expansion suspension type tail pipe drilling operation device comprises an inner pipe drilling tool assembly, a tail pipe drilling assembly and an expansion suspension assembly; the inner pipe drilling assembly comprises an inner pipe, and a reaming-while-drilling bit, a bottom drilling tool assembly, a ball seat, an anchoring mechanism, a motor, a central pipe and a pressure transmission mechanism which are sequentially connected with the inner pipe from top to bottom, wherein a fishing joint is arranged on the outer wall of the central pipe; the tail pipe drilling assembly is sleeved outside the anchoring mechanism in the inner pipe drilling assembly and comprises an auxiliary reaming bit with a hollow structure and a reaming driving mechanism connected to the upper part of the auxiliary reaming bit; the expansion suspension assembly is sleeved outside the inner pipe drilling tool assembly and the tail pipe drilling assembly and sequentially comprises an expansion bell mouth, an expansion hanger, a buckle changing connector and a tail pipe which are sequentially connected from top to bottom, a bell mouth stop block arranged between the expansion bell mouth and the inner pipe, an expansion cone arranged between the expansion hanger and the inner pipe and a sealing plug from top to bottom; wherein:
the expansion hanger is a section of expandable casing, the outside of the expansion hanger is vulcanized with a plurality of sections of sealing rubber, the lower pre-expansion section of the expansion hanger is connected with the buckle change joint, and the lower reducing section of the buckle change joint is connected with the tail pipe; the expansion cone is arranged in a pre-expansion section preset at the lower end of the expansion hanger, the interior of the expansion cone is in axial sliding sealing fit with the inner pipe, the exterior of the expansion cone and the expansion hanger form axial sealing sliding expanding fit, the sealing plug is connected with the upper port of the buckle-changing connector, the sealing plug and the central pipe form axial sealing sliding fit, and the expansion cone, the sealing plug and the pre-expansion section preset at the lower end of the expansion hanger form an annular closed piston cavity; the pressure transmission mechanism is arranged at the connecting end of the top of the central tube and the inner tube, a pulse pressure valve is arranged in the pressure transmission mechanism, pressure transmission holes communicated with the pulse pressure valve are circumferentially arranged in the pressure transmission mechanism, and the pressure transmission holes correspond to the piston cavity between the expansion cone and the sealing plug; the anchoring mechanism is arranged at the connecting end of the bottom of the central tube and the inner tube, an elastic anchor claw is arranged in the anchoring mechanism, and the anchor claw and an anchor claw groove of the reaming driving mechanism form radial anchoring fit; the tail pipe outside the reaming driving mechanism forms rotary sealing fit, and the lower part of the reaming driving mechanism is connected and linked with the auxiliary reaming drill.
The above scheme further comprises:
the inner pipe at the lower part of the expansion cone is fixed with a cone seat key, and the expansion cone and the cone seat key form axial key slot matching.
A rotary sealing mechanism is arranged between the reaming driving mechanism and the tail pipe.
The rotary seal mechanism includes a seal bearing.
The bottom hole assembly 8 comprises one or more of a bypass valve, a screw drill, a helical stabilizer and a rotary steering tool.
Compared with the prior art, the utility model has the advantages of:
(1) the drilling reaming mode combining the reaming-while-drilling drill bit and the auxiliary reaming drill bit is adopted, so that the safety of the tail pipe during the drilling is effectively ensured;
(2) after drilling and hanging of the tail pipe, the inner pipe drilling assembly is completely recycled at one time, and the tail pipe can serve as a technical casing for well completion and provides conditions for subsequent drilling;
(3) the device can be provided with LWD or MWD measurement-while-drilling instruments on the inner pipe drilling assembly to realize rotary steering drilling and measurement-while-drilling.
(4) By adopting the design of matching the anchoring mechanism, the reaming driving mechanism and the rotary sealing mechanism, the sliding drilling and the composite drilling of the tail pipe can be realized at the same time, and the drilling speed is improved;
(5) the device can seal and isolate complex layers by means of expansion hanger and cement paste, tail pipe tie-back and open hole plugging are realized, and drilling safety is guaranteed.
Drawings
Fig. 1 is a schematic structural view of an expansion suspension type tail pipe drilling operation device of the present invention;
fig. 2 is a schematic view of the assembly of a tail pipe string of an expansion suspension type tail pipe drilling operation device of the present invention;
fig. 3 is a schematic view of the expansion suspension type tail pipe drilling operation device of the present invention;
fig. 4 is a schematic diagram illustrating drilling of a tail pipe of an expansion suspension type tail pipe drilling operation device according to the present invention;
FIG. 5 is a schematic view of a liner cementing operation of the expansion suspension type liner drilling operation device of the present invention;
fig. 6 is a schematic view of an expansion suspension type drilling operation device of the present invention;
fig. 7 is a schematic diagram of a completion system for an expandable suspended liner drilling apparatus according to the present invention;
fig. 8 is a schematic view of the subsequent drilling operation of the expansion suspension type tail pipe drilling operation device of the present invention.
In the figure: 1. the drilling tool comprises an inner pipe drilling assembly, 2 a tail pipe drilling assembly, 3 an expansion suspension assembly, 4 a reaming-while-drilling bit, 5 an auxiliary reaming bit, 6 a reaming driving mechanism, 7 a rotary sealing mechanism, 8 a bottom hole assembly, 9 an anchoring mechanism, 10 a motor, 11 a tail pipe, 12 a variable buckle joint, 13 an expansion hanger, 14 an expansion cone, 15 a cone seat key, 16 a sealing plug, 17 a pressure transmission mechanism, 18 a pressure transmission hole, 19 an expansion bell mouth, 20 a bell mouth stop block, 21 sealing rubber, 22 a central pipe, 23 a fishing joint, 24 an inner pipe, 25 a drill pipe, 26 an upper casing, 27 a ball seat, 28 a rubber plug, 29 an open hole well hole and 30 drill bits.
Detailed Description
The utility model patent will be further described with reference to the attached drawings.
Example 1: an expansion suspension type tail pipe drilling operation device comprises an inner pipe drilling tool assembly 1, a tail pipe drilling assembly 2 and an expansion suspension assembly 3; the inner pipe drilling assembly 1 comprises an inner pipe 24, and a reaming-while-drilling bit 4, a bottom drilling assembly 8, a ball seat 27, an anchoring mechanism 9, a motor 10, a central pipe 22 and a pressure transmission mechanism 17 which are sequentially connected with the inner pipe 24 from top to bottom, wherein a fishing joint 23 is arranged on the outer wall of the central pipe 22; the tail pipe drilling assembly 2 is sleeved outside an anchoring mechanism 9 in the inner pipe drilling assembly 1 and comprises an auxiliary reaming bit 5 with a hollow structure and a reaming driving mechanism 6 connected to the upper part of the auxiliary reaming bit 5; the expansion suspension component 3 is sleeved outside the inner pipe drilling tool component 1 and the tail pipe drilling component 2 and sequentially comprises an expansion bell mouth 19, an expansion hanger 13, a buckle joint 12 and a tail pipe 11 which are sequentially connected from top to bottom, a bell mouth stop 20 arranged between the expansion bell mouth 19 and the inner pipe 24, an expansion cone 14 arranged between the expansion hanger 13 and the inner pipe 24 and a sealing plug 16 from top to bottom; wherein:
the expansion hanger 13 is an expandable casing, a plurality of sections of sealing rubber 21 are vulcanized on the exterior of the expansion hanger 13, the lower pre-expansion section of the expansion hanger 13 is connected with the buckle change connector 12, and the lower reducing section of the buckle change connector 12 is connected with the tail pipe 11; the expansion cone 14 is arranged in a pre-expansion section preset at the lower end of the expansion hanger 13, the expansion cone 14 is in axial sliding sealing fit with the inner pipe 24, the expansion cone 14 and the expansion hanger 13 form axial sealing sliding expanding fit, the sealing plug 16 is connected to the upper port of the buckle adapter 12, the sealing plug 16 and the central pipe 22 form axial sealing sliding fit, and the expansion cone 14, the sealing plug 16 and the pre-expansion section preset at the lower end of the expansion hanger 13 form an annular closed piston cavity; the pressure transmission mechanism 17 is arranged at the connecting end of the top of the central tube 22 and the inner tube 24, a pulse pressure valve is arranged in the pressure transmission mechanism 17, pressure transmission holes communicated with the pulse pressure valve are circumferentially arranged in the pressure transmission mechanism 17, and the pressure transmission holes correspond to the piston cavity between the expansion cone 14 and the sealing plug 16; the anchoring mechanism 9 is arranged at the connecting end of the bottom of the central tube 22 and the inner tube 24, an elastic fluke is arranged in the anchoring mechanism 9, and the fluke and the anchor fluke groove of the reaming driving mechanism 6 form radial anchoring fit; the tail pipe 11 outside the reaming driving mechanism 6 forms rotary sealing fit, and the lower part of the reaming driving mechanism 6 is connected and linked with the auxiliary reaming drill 5.
Example 2: the method further comprises the following steps on the basis of the embodiment 1:
a cone seat key 15 is fixed on the inner pipe 24 at the lower part of the expansion cone 14, and the expansion cone 14 and the cone seat key 15 form axial keyway matching.
A rotary seal mechanism 7 is provided between the reaming drive mechanism 6 and the tail pipe 11, and the rotary seal mechanism 7 includes a seal bearing.
The bottom drilling assembly 8 comprises a bypass valve, a screw drilling tool, a spiral stabilizer, a rotary steering tool and the like, can be adjusted according to actual needs, can be provided with LWD or MWD and other measurement-while-drilling instruments, and realizes directional drilling and measurement-while-drilling.
Exemplary embodiment 3: referring to fig. 1-8, an expansion suspended type tail pipe drilling operation device comprises three parts, namely an inner pipe drilling assembly 1, a tail pipe drilling assembly 2 and an expansion suspension assembly 3.
The tail pipe drilling assembly 2 is an outer pipe string of a tail pipe drilling device and comprises an auxiliary reaming bit 5, a reaming driving mechanism 6 and a rotary sealing mechanism 7. The auxiliary reaming bit 5 is a hollow PDC casing reaming bit which can be connected with a tail pipe 11, a reaming driving mechanism 6 is connected to the upper portion of the auxiliary reaming bit 5, a sealing bearing is mounted on a rotary sealing mechanism 7 to achieve rotary sealing, rotary dynamic sealing is formed between the reaming driving mechanism 6 and the tail pipe 11 through the rotary sealing mechanism 7, and the tail pipe 11 does not rotate along with the auxiliary reaming bit 5.
The inner pipe drilling assembly 1 is an inner pipe column of a tail pipe drilling device and mainly comprises a reaming-while-drilling drill bit 4, a bottom hole assembly 8, a ball seat 27, an anchoring mechanism 9, a motor 10, a central pipe 22 and an inner pipe 24, wherein the reaming-while-drilling drill bit 4, the bottom hole assembly 8 and the ball seat 27 extend out of the tail pipe drilling assembly 2, and the anchoring mechanism 9, the motor 10, the central pipe 22 and the inner pipe 24 are positioned inside the tail pipe drilling assembly 2.
The anchoring mechanism 9 connects the reaming drive mechanism 6 of the tail pipe drilling assembly 2 with the auxiliary reaming bit 4 of the inner pipe drilling assembly 1. The anchoring mechanism 9 is positioned in the reaming driving mechanism 6 of the tail pipe drilling assembly 2, and in an initial state, the fluke on the anchoring mechanism 9 is in a contraction state, and can extend out through a drilling fluid pulse signal to realize anchoring between the anchoring mechanism 9 and the reaming driving mechanism 6.
The motor 10 drives the inner pipe drilling assembly 1 to rotate, and the anchoring mechanism 9 drives the reaming driving mechanism 6 and the auxiliary reaming bit 5 of the tail pipe drilling assembly 2 to rotate, so that the auxiliary reaming bit 5 and the reaming bit 4 can synchronously drill. The bottom hole assembly 8 comprises a bypass valve, a screw drill, a spiral stabilizer and a rotary steering tool, can be adjusted according to actual needs, and can be provided with an LWD or MWD type measurement-while-drilling instrument to realize directional drilling and measurement-while-drilling.
The expansion suspension assembly 3 is positioned at the upper part of the tail pipe drilling device, realizes the running and suspension of a tail pipe 11, and mainly comprises an expansion suspension device 13, a variable buckle joint 12, an expansion cone 14, a cone seat key 15 and a pressure transmission mechanism 18. The expansion hanger 13 is a section of expandable casing short section, the exterior of the expansion hanger is vulcanized with a plurality of sections of sealing rubber 21, the upper part of the expansion hanger is provided with an expansion bell mouth 19 and a bell mouth stop block 20, and the lower part of the expansion hanger is connected with the tail pipe 11 through a buckle change joint 12. An expansion cone 14 and a sealing plug 16 are arranged in a pre-expansion section at the lower end of the expansion hanger 13 in advance, the sealing plug 16 and a fishing joint 23 are arranged on a central pipe 22 at the lower part of a cone seat key 15, the sealing plug 16 can slide along the central pipe 22, and the central pipe 22 is connected with an inner pipe 24 of the inner pipe drilling assembly 1. The cone seat key 15 is provided with a spline, the expansion cone 14 is internally provided with a spline groove matched with the spline, and the pressure transmission mechanism 17 is internally provided with a pressure transmission hole 18 which can be opened under a hydraulic state.
Application example 4: the operation method of the expansion suspension type tail pipe drilling operation device comprises the following steps:
step one, assembling a drilling liner assembly 2: referring to fig. 2, an auxiliary reaming bit 5, a reaming driving mechanism 6, a rotary sealing mechanism 7 and a tail pipe 11 are sequentially inserted.
Step two, the expansion suspension type tail pipe drilling device is put into: firstly, a reaming-while-drilling bit 4, a bottom hole assembly 8, a ball seat 27, an inner pipe 24, an anchoring mechanism 9 and a motor 10 are sequentially put into an inner pipe drilling assembly 1, an expansion suspension assembly 3 is connected with the inner pipe drilling assembly 1, then a buckle joint 12 of the expansion suspension assembly 3 is connected with a tail pipe 11, and then an expansion suspension type tail pipe drilling device is put into the drilling device by adopting a drill pipe 25 accompanying mode, and referring to the attached drawing 3.
Step three, drilling a tail pipe: when the drilling tool is used for sliding drilling, firstly, the anchoring mechanism 9 is enabled to act through a drilling fluid pulse signal to realize anchoring with the reaming driving mechanism 6, the motor 10 drives the reaming-while-drilling drill bit 4 to rotate, and meanwhile, the anchoring mechanism 9 and the reaming driving mechanism 6 drive the auxiliary reaming drill bit 5 to rotate, so that the reaming-while-drilling and the auxiliary reaming are synchronously carried out, but the inner pipe drilling assembly 1 and the tail pipe 11 above the motor 10 do not rotate; during composite drilling, the wellhead rotation turntable and the drill rod 25 are rotated, the drill rod 25 and the motor 10 act together to realize composite drilling of the tail pipe drilling assembly 2, and the expansion suspension type tail pipe drilling device is lowered into an open hole well bore 29 while drilling, and refer to the attached figure 4.
Step four, well cementation operation: after the tail pipe drilling device drills a target layer, anchoring between the anchoring mechanism 9 and the reaming driving mechanism 6 is released through a drilling fluid pulse signal, then well cementation is carried out, a rubber plug 28 is thrown in for replacing, and the ball seat 27 is impacted and pressed, and refer to the attached figure 5. If the bottom hole assembly 8 is provided with LWD, MWD type instrumentation, cementing operations may not be performed.
Step five, expansion suspension operation: after the cementing collision pressure, the pressure is pressed to open the pressure transfer hole 18 on the pressure transfer mechanism 17, the pressure is transferred to the expansion cone 14, the pressure is continuously pressed, the expansion and the hanging of the expansion hanger 13 are realized through hydraulic pressure and mechanical force, the sealing rubber 21 is squeezed between the expansion hanger 13 and the upper casing 26, and the tail pipe hanging operation is completed, referring to the attached figure 6.
Step six, pulling out the inner pipe drilling assembly: after the expansion hanger 13 is set, the drill string is lifted up and the inner tubular drilling assembly 1 is tripped out, and the seal plug 16 is tripped out simultaneously through the central tube 22 and the fishing sub 23, as shown in fig. 7.
Step seven, subsequent drilling operation: the drill bit 30 is lowered to clear the cement plug and the subsequent drilling operation is continued, see fig. 8.
The expansion suspension type tail pipe drilling operation device adopts a drilling reaming mode combining a reaming-while-drilling bit 4 and an auxiliary reaming bit 5 to realize rotary steering drilling and measurement-while-drilling, an inner pipe drilling assembly 1 is recycled at one time, a tail pipe 11 serves as a technical casing to complete well, conditions are provided for subsequent drilling, the problems of leakage, unstable well bore and the like are solved, and complex layers are sealed in a mode of realizing the return connection of the tail pipe 11 and the plugging of an open hole, so that underground accidents are reduced, and the drilling safety is improved.
Claims (5)
1. An expansion suspension type tail pipe drilling operation device comprises an inner pipe drilling tool assembly (1), a tail pipe drilling assembly (2) and an expansion suspension assembly (3); the method is characterized in that: the inner pipe drilling tool assembly (1) comprises an inner pipe (24), and a reaming-while-drilling bit (4), a bottom drilling tool assembly (8), a ball seat (27), an anchoring mechanism (9), a motor (10), a central pipe (22) and a pressure transmission mechanism (17) which are sequentially connected with the inner pipe (24) from top to bottom, wherein a fishing joint (23) is arranged on the outer wall of the central pipe (22); the tail pipe drilling assembly (2) is sleeved outside an anchoring mechanism (9) in the inner pipe drilling assembly (1) and comprises an auxiliary reaming bit (5) with a hollow structure and a reaming driving mechanism (6) connected to the upper part of the auxiliary reaming bit (5); the expansion suspension component (3) is sleeved outside the inner pipe drilling assembly (1) and the tail pipe drilling assembly (2), and sequentially comprises an expansion bell mouth (19), an expansion hanger (13), a buckle joint (12) and a tail pipe (11) which are sequentially connected from top to bottom, a bell mouth stop block (20) arranged between the expansion bell mouth (19) and the inner pipe (24), an expansion cone (14) arranged between the expansion hanger (13) and the inner pipe (24) and a sealing plug (16) from top to bottom; wherein:
the expansion hanger (13) is an expandable casing, a plurality of sections of sealing rubber (21) are vulcanized outside the expansion hanger (13), the lower pre-expansion section of the expansion hanger (13) is connected with the buckle changing joint (12), and the lower reducing section of the buckle changing joint (12) is connected with the tail pipe (11); the expansion cone (14) is arranged in a pre-expansion section preset at the lower end of the expansion hanger (13), the expansion cone (14) is axially matched with the inner pipe (24) in a sliding and sealing manner, the expansion cone (14) and the expansion hanger (13) form axial sealing sliding expanding fit, the sealing plug (16) is connected to the upper port of the buckle change connector (12), the sealing plug (16) and the central pipe (22) form axial sealing sliding fit, and the expansion cone (14), the sealing plug (16) and the pre-expansion section preset at the lower end of the expansion hanger (13) form an annular closed piston cavity; the pressure transmission mechanism (17) is arranged at the connecting end of the top of the central tube (22) and the inner tube (24), a pulse pressure valve is arranged in the pressure transmission mechanism (17), pressure transmission holes communicated with the pulse pressure valve are circumferentially arranged in the pressure transmission mechanism (17), and the pressure transmission holes correspond to piston cavities between the expansion cone (14) and the sealing plugs (16); the anchoring mechanism (9) is arranged at the connecting end of the bottom of the central pipe (22) and the inner pipe (24), an elastic anchor fluke is arranged in the anchoring mechanism (9), and the anchor fluke and an anchor fluke groove of the reaming driving mechanism (6) form radial anchoring fit; the outer tail pipe (11) of the reaming driving mechanism (6) forms rotary sealing fit, and the lower part of the reaming driving mechanism (6) is connected and linked with the auxiliary reaming drill bit (5).
2. The expandable suspended liner drilling apparatus of claim 1, wherein: a cone seat key (15) is fixed on the inner tube (24) at the lower part of the expansion cone (14), and the expansion cone (14) and the cone seat key (15) form axial keyway matching.
3. The expandable suspended liner drilling apparatus of claim 2, wherein: a rotary sealing mechanism (7) is arranged between the reaming driving mechanism (6) and the tail pipe (11).
4. The expandable suspended liner drilling apparatus of claim 3, wherein: the rotary sealing mechanism (7) comprises a sealing bearing.
5. The expandable suspended liner drilling apparatus as claimed in claim 1 or 2, 3 or 4, wherein: the bottom hole assembly (8) comprises one or more of a bypass valve, a screw drill, a spiral stabilizer and a rotary guiding tool.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920108977.3U CN210105753U (en) | 2019-01-23 | 2019-01-23 | Expansion suspension type tail pipe drilling operation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920108977.3U CN210105753U (en) | 2019-01-23 | 2019-01-23 | Expansion suspension type tail pipe drilling operation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530446A (en) * | 2020-04-15 | 2021-10-22 | 中国石油化工股份有限公司 | Drill pipe recovery device and drilling device of fishbone well |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113530446A (en) * | 2020-04-15 | 2021-10-22 | 中国石油化工股份有限公司 | Drill pipe recovery device and drilling device of fishbone well |
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