CN211974878U - Liner drilling assembly for liner drilling - Google Patents
Liner drilling assembly for liner drilling Download PDFInfo
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- CN211974878U CN211974878U CN202020054699.0U CN202020054699U CN211974878U CN 211974878 U CN211974878 U CN 211974878U CN 202020054699 U CN202020054699 U CN 202020054699U CN 211974878 U CN211974878 U CN 211974878U
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Abstract
The utility model discloses a tail pipe creeps into subassembly for tail pipe well drilling, including boring reaming drill bit along with the drilling, supplementary reaming drill bit, reaming actuating mechanism, rotary seal mechanism, a motor, tail pipe and drilling rod, reaming actuating mechanism links to each other with supplementary reaming drill bit and tail pipe respectively, boring reaming drill bit links to each other with the drilling rod along with the drilling, at drilling rod and reaming actuating mechanism, install rotary seal mechanism between the bottom tail pipe, the motor passes through the drilling rod drive and bores reaming drill bit rotation along with the drilling, rotary seal mechanism drives the supplementary reaming drill bit of reaming actuating mechanism drive rotatory, and form the rotary seal cooperation that lasts between tail pipe and drilling rod. The utility model discloses a following drilling reaming drill bit and the supplementary reaming drill bit that creeps into the reaming mode that combines together, the tail pipe creeps into the back, and the drilling tool can realize whole recoveries, for follow-up drilling provides the condition, solves the problem that the leakage and well are unstable to reduce the accident in the pit, improved the well drilling security, reduce the well drilling risk.
Description
Technical Field
The utility model relates to a well drilling and completion instrument field in the oil and gas trade especially relates to a tail pipe that is used for tail pipe well drilling creeps into subassembly, can realize the tail pipe and creeps into the operation.
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 "drilling technique and its application" published in "oil drilling technique" 2003, 31, vol.2 introduces the state of the art and application of foreign drilling technique with tail pipe.
Chinese patent 200810137580.3 discloses a liner drilling and completion process, which comprises a technical casing completion, after the technical casing is cemented; (1) connecting a tail pipe drill column; comprises a kelly bar, a drill rod, a rotary tail pipe hanger capable of respectively drilling and completing wells, a tail pipe, a flower basket type rubber plug seat, a float collar and a drill bit; (2) drilling a well by a tail pipe; drilling a well by using gas as a circulating medium; (3) after drilling is finished; circulating the drilling fluid; (4) the tail pipe is hung and the feeding tool is detached from the tail pipe hanger; the drilling fluid is continuously pressurized to 8 MPa, a tool is sent into the drilling string to be separated from a liner hanger and keep sealing, the pressure is continuously pressurized to 15 MPa, a well cementation channel is opened, and cement can be injected; (5) connecting the well completion pipe string; the cement head is connected with the rotating mechanism, and the rotating mechanism is connected with a tail pipe drill column; (6) rotating a tail pipe to fix the well; rotating the turntable, injecting cement slurry, putting a solid plug into the pipe column to replace drilling fluid, pressurizing to 15 MPa after impacting, compounding and keeping sealing the solid plug and the hollow plug, descending together, compounding and keeping sealing with the rubber plug seat; (7) setting and sealing a tail pipe hanger; lifting the feeding tool to a certain height, pressing down the drill string, and setting the rotary liner hanger sealing mechanism into the upper-stage casing; (8) tripping out the drill pipe and running in the tool. In the tail pipe drilling in the scheme, drilling fluid is used as a circulating medium for drilling. However, the internal diameter of the tail pipe drilling completion of complex layers in deep wells and ultra-deep wells is small, and the used tail pipe hanger has a complex structure, so that great risks are brought to the tail pipe drilling and well fixing completion construction.
The applicant applies for and discloses an expansion type tail pipe drilling operation device and an operation method thereof (patent number 201510655103.6), wherein the expansion type tail pipe drilling operation device comprises three parts, namely 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 double-core reaming bit, a sealing central pipe, a floating hoop and a ball seat, wherein the double-core reaming bit, the sealing central pipe, the floating hoop 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 shearing 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 above scheme further comprises: the double-core reaming bit is an eccentric bit, and the expansion hanger is a multi-stage sealing rubber cylinder. The sealing head of the sealing central tube is provided with a sealing groove and a sealing ring, the expansion bell mouth is provided with a bell mouth stop block, and a mud stopper is arranged in the annular space between the central tube and the expansion sleeve. The device and the method combine the tail pipe drilling and the expansion casing pipe into one drilling, but only can realize the recovery of the expansion pipe column, the tail pipe drilling pipe column is permanently left at the well bottom, which causes great difficulty for subsequent drilling, in addition, in the tail pipe drilling process, the expansion casing pipe column also needs to rotate along with the tail pipe drilling pipe column, which easily causes the abrasion and the damage of the outer pipe column and influences the expansion operation, therefore, the device and the method can only be used for the last completion in the drilling process, namely, the device serves as the tail pipe completion to perform well completion operation, is difficult to perform subsequent drilling operation, cannot serve as a technical casing to seal off the stratum, and is a disposable tail pipe drilling and well completion device.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the difficult problem that current tail pipe drilling technology faces, provided a tail pipe that is used for the well drilling of tail pipe and crews the subassembly, as the key core component of the well drilling of tail pipe, can solve the tail pipe and creep into and retrieve the problem with the drilling tool, the tail pipe can act as technical sleeve pipe after the well completion, can continue to creep into after packing the complicated stratum.
The technical scheme of the utility model is that:
a tail pipe drilling assembly for tail pipe drilling comprises a reaming-while-drilling drill bit, an auxiliary reaming drill bit, a reaming driving mechanism, a motor, a drill pipe nipple, a tail pipe, a sealing bearing, a pressure transmission mechanism and a pressurizing mechanism; wherein:
the lower end of the drill pipe short section is connected with a reaming-while-drilling drill bit through a ball seat, the upper end of the drill pipe short section is connected with a motor, and a spline shaft is arranged in the middle section of the drill pipe short section;
the lower end of the reaming driving mechanism is connected with an auxiliary reaming drill bit, the inner wall of the upper end part is provided with a spline groove which is axially inserted and rotationally matched with the spline shaft, and the reaming driving mechanism is sleeved in the tail pipe above the reaming driving mechanism;
the sealing bearing is arranged in an annular space between the reaming driving mechanism and the tail pipe and rotationally seals the reaming driving mechanism and the tail pipe;
the pressure transmission mechanism and the pressurization mechanism are both positioned at the upper part of the reaming driving mechanism, wherein the pressurization mechanism is a boss fixed on the drill pipe nipple, and the pressure transmission mechanism is sleeved between the drill pipe nipple and the reaming driving mechanism and positioned below the pressurization mechanism;
the drill pipe short section transmits the bit pressure to an auxiliary reaming bit and a reaming-while-drilling bit simultaneously through a pressurizing mechanism and a pressure transmitting mechanism; the lower end of the drill pipe short section, the ball seat and the reaming-while-drilling drill bit extend out of the bottom of the auxiliary reaming drill bit;
the motor is connected between a drill rod and a drill rod short section on the upper portion of the pressurizing mechanism, the motor drives the reaming-while-drilling drill bit to rotate through the drill rod short section on the lower portion, and the motor drives the auxiliary reaming drill bit to rotate through the reaming driving mechanism.
The above scheme further comprises:
the motor is a screw structure motor; the reaming-while-drilling drill bit is an eccentric drill bit or a bi-center drill bit.
One of the aforementioned liner drilling assembly applications for liner drilling further comprises: the expansion drill pipe comprises a drill pipe connected above a motor, an expansion cone sleeved outside the drill pipe, an expansion casing connected above a tail pipe, an expansion hanger arranged on the expansion casing, and a releasing mechanism connected on the drill pipe.
The releasing mechanism is a hydraulic releasing tool and is positioned on the drill rod between the expansion cone and the motor.
The second liner drilling assembly application for liner drilling further comprises: the expansion drill rod comprises a sealing plug and an expansion cone which are connected to the outside of the drill rod, a pressure transmission hole arranged on the drill rod, an expansion casing connected with a tail pipe and an expansion hanger arranged on the expansion casing.
The pressure transmission hole is positioned between the expansion cone and the sealing plug.
The expansion hanger is made of a plurality of sections of sealing rubber materials.
The utility model discloses an advantage lies in:
(1) the utility model adopts a drilling reaming mode combining the reaming while drilling drill bit and the auxiliary reaming drill bit, and can realize the drilling downward of the tail pipe;
(2) the motor and the rotary sealing mechanism are designed in a matched mode, so that sliding drilling and composite drilling of a tail pipe can be achieved at the same time, and the drilling speed is improved;
(3) after the tail pipe is drilled, the drilling tool can be completely recycled, the tail pipe can be used as a technical casing for well completion, the tail pipe is connected in a tie-back mode, a complex layer is plugged in an open hole, and conditions are provided for subsequent drilling.
Drawings
FIG. 1 is a schematic illustration of a liner drilling assembly for liner drilling;
fig. 2 is a schematic view of a drilling liner of the present invention with an expansion casing;
fig. 3 is a schematic view of drilling a liner with an expansion suspension according to another embodiment of the present invention.
In the figure: 1. the drilling tool comprises a reaming-while-drilling drill bit, 2 an auxiliary reaming drill bit, 3 a reaming driving mechanism, 4 a drill pipe short section, 5 a sealing bearing, 6 a spline shaft, 7 a spline groove, 8 a pressurizing mechanism, 9 a pressure transmission mechanism, 10 a motor, 11 an expansion sleeve, 12 an expansion cone, 13 a drill pipe, 14 a tail pipe, 15 an expansion hanger, 16 a ball seat, 17 an expansion starter, 18 a releasing mechanism, 19 a pressure transmission hole and 20 a sealing plug.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Example 1:
a tail pipe drilling assembly for tail pipe drilling comprises a reaming-while-drilling drill bit 1, an auxiliary reaming drill bit 2, a reaming driving mechanism 3, a motor 10, a drill pipe nipple 4, a tail pipe 14, a sealing bearing 5, a pressure transmission mechanism 9 and a pressurizing mechanism 8; wherein:
the lower end of the drill pipe short section 4 is connected with the reaming-while-drilling drill bit 1 through a ball seat 16, the upper end of the drill pipe short section 4 is connected with a motor 10, and a spline shaft 6 is arranged in the middle section of the drill pipe short section 4;
the lower end of the reaming driving mechanism 3 is connected with the auxiliary reaming drill bit 2, the inner wall of the upper end part is provided with a spline groove 7 which is axially inserted, connected and rotationally matched with the spline shaft 6, and the reaming driving mechanism 3 is sleeved in a tail pipe 14 above;
the sealing bearing 5 is arranged in an annular space between the reaming driving mechanism 3 and the tail pipe 14 and rotationally seals the reaming driving mechanism 3 and the tail pipe 14;
the pressure transmission mechanism 9 and the pressurization mechanism 8 are both positioned at the upper part of the reaming driving mechanism 3, wherein the pressurization mechanism 8 is a boss fixed on the drill pipe nipple 4, and the pressure transmission mechanism 9 is sleeved between the drill pipe nipple 4 and the reaming driving mechanism 3 and positioned below the pressurization mechanism 8;
the drill rod short section 4 transmits the bit pressure to the auxiliary reaming bit 2 and the reaming bit 1 while drilling through a pressurizing mechanism 8 and a pressure transmitting mechanism 9; the lower end of the drill rod short section 4, together with the ball seat 16 and the reaming-while-drilling drill bit 1 extend out of the bottom of the auxiliary reaming drill bit 2;
the motor 10 is connected between a drill rod 13 and a drill rod short section 4 on the upper portion of the pressurizing mechanism 8, the motor 10 drives the reaming-while-drilling drill bit 1 to rotate through the drill rod short section 4 on the lower portion, and the motor 10 simultaneously drives the auxiliary reaming drill bit 2 to rotate through the reaming driving mechanism 3.
The motor 10 is a screw structure motor; the reaming-while-drilling bit 1 is an eccentric bit or a bi-center bit.
Example 2:
a liner drilling assembly for liner drilling based on the foregoing embodiment 1 further comprising: a drill pipe 13 connected above the motor 10, an expansion cone 12 sleeved outside the drill pipe 13, an expansion casing 11 connected above a tail pipe 14, an expansion hanger 15 arranged on the expansion casing 11, and a releasing mechanism 18 connected on the drill pipe 13.
The release mechanism 18 is a hydraulic release tool located on the drill pipe 13 between the expansion cone 12 and the motor.
Example 3:
a liner drilling assembly for liner drilling based on the foregoing embodiment 1 further comprising: the expansion device comprises a sealing plug 20 connected to the outside of a drill pipe 13, an expansion cone 12, a pressure transmission hole 19 arranged on the drill pipe 13, an expansion casing 11 connected with a tail pipe 14 and an expansion hanger 15 arranged on the expansion casing 11.
The pressure transfer hole 19 is located between the expansion cone 12 and the sealing plug 20.
The expansion hanger 15 is made of a plurality of sections of sealing rubber materials.
Example 4:
referring to the attached drawing 1, the tail pipe drilling assembly for tail pipe drilling comprises a reaming-while-drilling drill bit 1, an auxiliary reaming drill bit 2, a reaming driving mechanism 3, a drill pipe short section 4, a motor 10, a drill pipe 13, a pressurizing mechanism 8 and a pressure transmitting mechanism 9.
The tail pipe 14, the reaming driving mechanism 3 and the auxiliary reaming drill bit 2 are sequentially connected in series from top to bottom, the drill rod 13 penetrates into the tail pipe 14, and the bottom end of the drill rod short section 4 is connected with the reaming while drilling drill bit 1.
And a rotary sealing mechanism is arranged between the drill pipe nipple 4, the reaming driving mechanism 3 and the bottom tail pipe 14. The pressure transmission mechanism 9 and the pressure mechanism 8 are respectively positioned on the upper part of the rotary sealing mechanism, the pressure mechanism 8 is a boss on the drill pipe nipple 4, and the pressure transmission mechanism 9 is sleeved on the drill pipe nipple 4 and is positioned below the pressure mechanism 8. A motor 10 is installed on a drill pipe short section 4 on the upper portion of a pressurizing mechanism 8, the motor 10 drives a reaming-while-drilling drill bit 1 to rotate through the drill pipe short section 4, a rotary sealing mechanism drives a reaming driving mechanism 3 to drive an auxiliary reaming drill bit 2 to rotate, and continuous rotary sealing matching is formed between a tail pipe 14 and the drill pipe short section 4. The drill pressure can be simultaneously transmitted to the auxiliary reaming bit 2 and the reaming-while-drilling bit 1 through the drill rod pup joint 4, the pressurizing mechanism 8 and the pressure transmitting mechanism 9.
The rotary sealing mechanism consists of a sealing bearing 5, a spline shaft 6 connected with the drill rod short section 4, a spline groove 7 on the reaming driving mechanism 3 and a sealing ring, and the spline shaft 6 and the spline groove 7 mutually form spline fit.
The reaming-while-drilling bit 1 is an eccentric bit or a bi-center bit, a spline shaft 6 of a rotary sealing mechanism and a reaming driving mechanism 3 are provided with a spline groove 7 and a sealing ring, the upper part of the reaming-while-drilling bit 1 is provided with a bypass valve and a ball seat 16, and a tail pipe 14 is a high-torsion-resistance sleeve.
The utility model discloses can cooperate expansion casing 11 and expansion hanger 15 to realize 14 drilling operations of inflation formula tail pipe, also can cooperate conventional high antitorque tail pipe 14 and expansion hanger 15 to realize 14 drilling operations of expansion suspension formula tail pipe, according to 14 types of tail pipe different, provide two kinds of embodiments.
Example 5:
referring to the attached drawing 2, the utility model discloses cooperation expansion sleeve 11 carries out inflation formula tail pipe drilling operation, and 14 tops of tail pipe are expandable expansion sleeve 11, and expansion sleeve 11 bottom is one section inflation starter 17 of expanding in advance, and preset expansion awl 12 in the inflation starter 17, expansion sleeve 11 top link to each other with inflation hanger 15, and the outside solidification of expansion sleeve 11 has the multistage sealing rubber material. A releasing mechanism 18 is arranged on the drill rod 13, and the releasing mechanism 18 is positioned between the expansion cone 12 and the rotary sealing mechanism.
During normal composite drilling, when the motor 10 rotates, the wellhead turntable drives the drill rod 13 to rotate, the drill rod 13 and the motor 10 act together to drive the reaming-while-drilling drill bit 1 and the auxiliary reaming drill bit 2 to rotate rapidly, composite drilling of the pipe column is achieved, and the expansion casing 11 is lowered into an open hole well while drilling. The motor is of a screw structure, can realize rotary driving under the action of fluid and drives the bottom drilling tool to rotate, namely slide; the drill rod is connected with the motor, and when the drill rod is driven to drill, the motor is driven to rotate, and the linkage is realized with the rotation of the motor.
After drilling of the tail pipe 14 is finished, hydraulic releasing is carried out on the releasing mechanism 18 through pressure-holding, hydraulic pressure is transmitted to the expansion cone 12, expansion operation of the expansion casing 11 and the expansion hanger 15 is completed through pressure-holding, and suspension sealing of the expansion casing 11 is achieved after pressure is released. When the releasing mechanism 18 is hydraulically released, the upper pipe string and the lower pipe string of the drill rod 13 are separated from each other at the releasing mechanism 18, and the upper pipe string and the lower pipe string are taken out of the well drilling tool in two steps. After the expansion operation of the tail pipe 14, the expansion cone 12 and the drill pipe 13 at the upper part of the releasing mechanism 18 are firstly started, and the drill pipe nipple 4 at the lower part of the releasing mechanism 18 and the reaming-while-drilling bit 1 are left in the well. The used releasing mechanism 18 can adopt a hydraulic releasing tool suitable for drill rod connection, such as a hydraulic releasing joint disclosed in patent No. 201610972088.2, a fishing spear or a male cone is put in to salvage after releasing, the reaming-while-drilling drill bit 1, the ball seat 16, the motor 10 and the releasing mechanism 18 left in the well are fished out of the well mouth to form a smooth shaft, and the drill bit can be put in to complete subsequent drilling operation.
Example two:
referring to the attached drawing 3, the utility model discloses cooperation high antitorque tail pipe 14 and expansion hanger 15 carry out the drilling of tail pipe 14 and the operation is hung in the expansion, and 14 upper portions of tail pipe are direct to be connected with expansion hanger 15, have preset expansion awl 12 on the drilling rod 13 in the expansion hanger 15, pass pressure hole 19 and sealed end cap 20, pass pressure hole 19 and lie in between expansion awl 12 and the sealed end cap 20, pass pressure mechanism 16 and open intercommunication drilling rod 13 inner and outer space under certain pressure.
A drill pipe 13 is used to accompany the liner 14, the expansion hanger 15 down the well. The sliding drilling of the pipe string is realized by the method of the first embodiment, the tail pipe 14 and the drill pipe 13 on the upper part of the motor 10 do not rotate; in compound drilling, the tailpipe 14 and the drill pipe 13 simultaneously act as a drill string to perform tailpipe 14 drilling operations.
After drilling of the tail pipe 14 is finished, the pressure transmitting hole 19 is opened through pressure build-up, hydraulic pressure is transmitted to the expansion cone 12, expansion of the expansion hanger 15 is completed through pressure build-up, and suspension sealing of the tail pipe 14 is achieved. Because the expansion stroke of the expansion hanger 15 is short, a pressure cavity is formed by adopting a sealing plug 20 mode, the sealing plug 20, the motor 10 and the reaming-while-drilling bit 1 directly lift out of a well head at one time along with the drill rod 13 after the expansion hanger is hung, and a smooth shaft is formed by single recovery, so that the requirement of subsequent drilling operation is met. The pressure transmission hole can adopt a spline shaft structure disclosed in patent No. 200910143573.9, and the pressure is suppressed to open a blasting disk on the spline shaft to realize pressure transmission. Namely, the explosion disc is arranged in the pressure transmission hole and can be punctured under a certain pressure condition, so that pressure transmission is realized.
It should be noted that the liner hanger described in the second embodiment is an expansion hanger 15, and the present invention can also be used in conjunction with a conventional slip liner hanger for drilling liner.
The utility model adopts the drilling reaming mode of combining the reaming-while-drilling bit 1 and the auxiliary reaming bit 2, and can realize the downward insertion of the tail pipe 14 while drilling; after the tail pipe 14 drills, the drilling tool can be completely recycled, the tail pipe 14 can be used as a technical casing for well completion, the return connection of the tail pipe 14 and the plugging of a complex layer by an open hole are realized, conditions are provided for subsequent drilling, and the problems of leakage and unstable well bore are solved, so that underground accidents are reduced, the drilling safety is improved, and the drilling risk is reduced.
Claims (8)
1. The utility model provides a tail pipe creeps into subassembly for tail pipe well drilling, includes and bores reaming drill bit (1), supplementary reaming drill bit (2), reaming actuating mechanism (3), motor (10) and drilling rod nipple joint (4), tail pipe (14) along with boring, its characterized in that still includes: a sealing bearing (5), a pressure transmission mechanism (9) and a pressurizing mechanism (8); wherein:
the lower end of the drill rod short section (4) is connected with a reaming-while-drilling drill bit (1) through a ball seat (16), the upper end of the drill rod short section (4) is connected with a motor (10), and a spline shaft (6) is arranged in the middle section of the drill rod short section (4);
the lower end of the reaming driving mechanism (3) is connected with the auxiliary reaming drill bit (2), the inner wall of the upper end part is provided with a spline groove (7) which is axially inserted into the spline shaft (6) for rotary matching, and the reaming driving mechanism (3) is sleeved in a tail pipe (14) at the upper part;
the sealing bearing (5) is arranged in an annular space between the reaming driving mechanism (3) and the tail pipe (14) and rotationally seals the reaming driving mechanism (3) and the tail pipe (14);
the pressure transmission mechanism (9) and the pressurization mechanism (8) are both positioned at the upper part of the reaming driving mechanism (3), wherein the pressurization mechanism (8) is a boss fixed on the drill rod short section (4), and the pressure transmission mechanism (9) is sleeved between the drill rod short section (4) and the reaming driving mechanism (3) and is positioned below the pressurization mechanism (8);
the drill rod short section (4) transmits the bit pressure to the auxiliary reaming bit (2) and the while-drilling reaming bit (1) through a pressurizing mechanism (8) and a pressure transmitting mechanism (9); the lower end of the drill rod short section (4) together with the ball seat (16) and the reaming-while-drilling drill bit (1) extend out of the bottom of the auxiliary reaming drill bit (2);
the motor (10) is connected between a drill rod (13) and a drill rod short section (4) on the upper portion of the pressurizing mechanism (8), the motor (10) drives the reaming-while-drilling drill bit (1) to rotate through the drill rod short section (4) on the lower portion, and the motor (10) drives the auxiliary reaming drill bit (2) to rotate through the reaming driving mechanism (3).
2. The liner drilling assembly for liner drilling according to claim 1, wherein: the motor (10) is a screw structure motor; the reaming-while-drilling drill bit (1) is an eccentric drill bit or a bi-center drill bit.
3. The liner drilling assembly for liner drilling according to claim 1 or 2, further comprising: the drilling rod (13) is connected above the motor (10), the expansion cone (12) is sleeved outside the drilling rod (13), the expansion casing (11) is connected above the tail pipe (14), the expansion hanger (15) is arranged on the expansion casing (11), and the releasing mechanism (18) is connected on the drilling rod (13).
4. The liner drilling assembly for liner drilling according to claim 3, wherein: the releasing mechanism (18) is a hydraulic releasing tool and is positioned on the drill rod (13) between the expansion cone (12) and the motor.
5. The liner drilling assembly for liner drilling according to claim 1 or 2, further comprising: the expansion drill pipe comprises a sealing plug (20) and an expansion cone (12) which are connected to the outside of a drill pipe (13), a pressure transmission hole (19) which is arranged on the drill pipe (13), an expansion casing pipe (11) which is connected with a tail pipe (14), and an expansion hanger (15) which is arranged on the expansion casing pipe (11).
6. The liner drilling assembly for liner drilling according to claim 5, wherein: the pressure transfer hole (19) is positioned between the expansion cone (12) and the sealing plug (20).
7. The liner drilling assembly for liner drilling according to claim 3, wherein: the expansion hanger (15) is made of a plurality of sections of sealing rubber materials.
8. The liner drilling assembly for liner drilling according to claim 5, wherein: the expansion hanger (15) is made of a plurality of sections of sealing rubber materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020054699.0U CN211974878U (en) | 2020-01-12 | 2020-01-12 | Liner drilling assembly for liner drilling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020054699.0U CN211974878U (en) | 2020-01-12 | 2020-01-12 | Liner drilling assembly for liner drilling |
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| CN211974878U true CN211974878U (en) | 2020-11-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123721A (en) * | 2020-01-12 | 2021-07-16 | 中石化石油工程技术服务有限公司 | Liner drilling assembly for liner drilling |
| CN113482598A (en) * | 2021-08-24 | 2021-10-08 | 中石化石油工程技术服务有限公司 | Storage well logging locking and releasing short section and device |
-
2020
- 2020-01-12 CN CN202020054699.0U patent/CN211974878U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123721A (en) * | 2020-01-12 | 2021-07-16 | 中石化石油工程技术服务有限公司 | Liner drilling assembly for liner drilling |
| CN113123721B (en) * | 2020-01-12 | 2024-09-17 | 中石化石油工程技术服务有限公司 | Tail pipe drilling assembly for tail pipe drilling |
| CN113482598A (en) * | 2021-08-24 | 2021-10-08 | 中石化石油工程技术服务有限公司 | Storage well logging locking and releasing short section and device |
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