CN211666637U - Liner drilling assembly for directional liner drilling - Google Patents
Liner drilling assembly for directional liner drilling Download PDFInfo
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- CN211666637U CN211666637U CN201921763816.4U CN201921763816U CN211666637U CN 211666637 U CN211666637 U CN 211666637U CN 201921763816 U CN201921763816 U CN 201921763816U CN 211666637 U CN211666637 U CN 211666637U
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Abstract
The utility model discloses a tail pipe drilling assembly for directional tail pipe drilling, which consists of an outer pipe column and an inner pipe column, wherein the outer pipe column comprises an auxiliary reaming drill bit with a hollow structure, a reaming driving mechanism connected to the upper part of the auxiliary reaming drill bit, a rotary sealing mechanism provided with a sealing bearing and a tail pipe component; the inner string includes a reaming-while-drilling bit extending out of the auxiliary reaming bit, a bottom hole assembly, a ball seat, and an anchoring mechanism, a motor and an inner string member located inside the outer string. 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 can realize the tail pipe and follow drilling down, and rotatory direction creeps into and measure along with the drilling, and the tail pipe drills into the back, and the drilling tool can realize whole recoveries, for follow-up the condition that creeps into, solves the problem of leakage and borehole instability to reduce the accident in the pit, reduce the well drilling risk.
Description
Technical Field
The utility model relates to a device that drilling well completion technical field in the oil and gas trade can realize tail pipe directional drilling operation especially relates to a tail pipe drilling subassembly that is used for directional tail pipe drilling.
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 No. 200810137580.3 discloses a liner drilling and completion process, comprising (1) a liner drill string connection; 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. 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.
Chinese patent No. 201510655103.6 discloses an expansion type tail pipe drilling operation device, including tail pipe drilling assembly, tail pipe connection and start assembly and tail pipe expansion assembly triplex, 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 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, and the tail pipe drilling pipe column is permanently left at the bottom of a well, thereby causing great difficulty in subsequent drilling.
In summary, most of the disclosed liner drilling technologies can only be used for the last completion in the drilling process, namely, the liner serves as a completion liner for completion, subsequent drilling operation is difficult to perform, and the liner cannot serve as a technical casing for sealing off a stratum, and the liner drilling technology belongs to a disposable liner drilling and completion device; meanwhile, expensive measuring instruments such as LWD and MWD must be lifted out of a wellhead, so that the disposable liner drilling device cannot be provided with a measurement-while-drilling instrument, and the directional liner drilling operation is difficult to realize.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the difficult problem that the tail pipe drilling technology that has now disclosed faces, provide a tail pipe drilling subassembly for directional tail pipe drilling. The assembly is used as a key core component of tail pipe drilling, can perform tail pipe directional drilling operation, can solve the problems of tail pipe drilling and drilling tool recovery, can serve as a technical casing after well completion, and can continue drilling after sealing a complex stratum.
The technical scheme of the utility model is that:
a tail pipe drilling assembly for directional tail pipe drilling comprises an outer pipe column and an inner pipe column, wherein the outer pipe column comprises an auxiliary reaming drill bit with a hollow structure, a reaming driving mechanism connected to the upper part of the auxiliary reaming drill bit, a rotary sealing mechanism provided with a sealing bearing and a tail pipe component; the inner string includes a reaming-while-drilling bit extending out of the auxiliary reaming bit, a bottom hole assembly, a ball seat, and an anchoring mechanism, a motor and an inner string member located inside the outer string. The anchoring mechanism is positioned in the reaming driving mechanism, the fluke on the anchoring mechanism is in a contraction state in an initial state, and can extend out of the fluke through a drilling fluid pulse signal to realize anchoring between the anchoring mechanism and the reaming driving mechanism, so that the auxiliary reaming drill bit can synchronously drill along with the reaming-while-drilling drill bit on the inner pipe. The motor is arranged on the inner pipe above the anchoring mechanism, the drill bit while drilling is driven to rotate through the drill rod, the anchoring mechanism and the rotary sealing mechanism drive the reaming driving mechanism to drive the auxiliary reaming bit to rotate, rotary dynamic sealing is formed between the reaming driving mechanism and the tail pipe through the rotary sealing mechanism, and the tail pipe does not rotate along with the auxiliary reaming bit.
A tail pipe drilling assembly for directional tail pipe drilling comprises a bypass valve, a screw drilling tool, a spiral stabilizer and a rotary steering tool, can be adjusted according to actual needs, can be provided with an LWD or MWD measurement-while-drilling instrument, and realizes directional drilling and measurement-while-drilling.
After the drilling operation of the tail pipe is finished, the reaming-while-drilling drill bit, the bottom drilling tool assembly and the anchoring mechanism are pulled out of the well at one time to form a smooth shaft.
The utility model discloses an advantage lies in:
(1) the drilling reaming mode combining the reaming-while-drilling drill bit and the auxiliary reaming drill bit is adopted, and the measuring instrument while drilling can be installed on the bottom drilling tool assembly, so that the drilling and the measurement while drilling of the directional tail pipe can be realized;
(2) 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;
(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 structural view of a liner drilling assembly for directional liner drilling according to the present invention;
FIG. 2 is a schematic view of the liner drilling assembly of the present invention running in;
fig. 3 is a schematic view of the operation of the drilling assembly of the tail pipe 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 rotary sealing mechanism, 5 a sealing bearing, 6 an anchoring mechanism, 7 a bottom drilling assembly, 8 a motor, 9 a tail pipe, 10 an inner pipe, 11 an anchor claw, 12 a ball seat, 13 an expansion hanger, 14 an expansion cone, 15 a drill rod, 16 a pressure transmission mechanism, 17 a sealing plug and 18 an upper casing.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Referring to the attached drawing 1, a tail pipe drilling assembly for directional tail pipe drilling comprises an outer pipe column and an inner pipe column, wherein the outer pipe column comprises an auxiliary reaming bit 2, a reaming driving mechanism 3, a rotary sealing mechanism 4 and a tail pipe 9, the auxiliary reaming bit 2 is a hollow PDC casing reaming bit capable of being connected with the tail pipe 9, the reaming driving mechanism 3 is connected to the upper portion of the auxiliary reaming bit 2, a sealing bearing 5 is installed on the rotary sealing mechanism 4 and can achieve rotary sealing, rotary dynamic sealing is formed between the reaming driving mechanism 3 and the tail pipe 9 through the rotary sealing mechanism 4, and the tail pipe 9 does not rotate along with the auxiliary reaming bit 2.
The inner pipe column comprises a reaming-while-drilling bit 1, a bottom drilling assembly 7, a ball seat 12, an anchoring mechanism 6, a motor 8 and an inner pipe 10, wherein the reaming-while-drilling bit 1, the bottom drilling assembly 7 and the ball seat 12 extend out of the outer pipe column, and the anchoring mechanism 6, the motor 8 and the inner pipe 10 are positioned inside the outer pipe column.
The upper part of the tail pipe 9 is connected with an expansion hanger 13, the expansion hanger 13 is provided with an expansion cone 14 and a sealing plug 17 in sequence from top to bottom between the inner pipe 10 and the tail pipe 9, a pressure transmission mechanism 16 is arranged on the inner pipe 10 and is positioned between the expansion cone 14 and the sealing plug 17, and the pressure transmission mechanism 16 is opened and communicated with the inner space and the outer space of the inner pipe 10 under certain pressure.
The anchoring mechanism 6 is positioned in the reaming driving mechanism 3, and in an initial state, the fluke 11 on the anchoring mechanism 6 is in a contraction state, and can extend out of the fluke 11 through a drilling fluid pulse signal to realize anchoring between the anchoring mechanism 6 and the reaming driving mechanism 3.
The motor 8 is arranged on the inner pipe 10 above the anchoring mechanism 6, the reaming-while-drilling bit 1 is driven to rotate through the inner pipe 10, the anchoring mechanism 6 and the rotary sealing mechanism 4 drive the reaming driving mechanism 3 to drive the auxiliary reaming bit 2 to rotate, and synchronous drilling of the auxiliary reaming bit 2 and the reaming-while-drilling bit 1 is achieved. The bottom hole assembly 7 comprises a bypass valve, a screw drill, a spiral stabilizer and a rotary steering tool, is adjusted according to actual needs, can be provided with an LWD or MWD measurement-while-drilling instrument, and realizes directional drilling and measurement-while-drilling.
The utility model discloses need to cooperate high antitorque tail pipe 9, liner hanger and drilling rod to realize the tail pipe drilling operation, provide the embodiment of a cooperation expansion hanger 13 operation now.
Referring to fig. 2 and 3, the upper part of the tail pipe 9 is connected with an expansion hanger 13, and the expansion hanger 13 is provided with an expansion cone 14, a pressure transmission mechanism 16 and a sealing plug 17 on the inner pipe 10 in advance. Firstly, an auxiliary reaming bit 2, a reaming driving mechanism 3 and a tail pipe 9 are put in, then a reaming while drilling bit 1, a bottom drilling tool assembly 7, an anchoring mechanism 6, an inner pipe 10 and a motor 8 are put in, and then an expansion hanger 13 is connected with the inner pipe column and the outer pipe column, wherein the expansion hanger 13 is put in a drill pipe 15 accompanying mode, and the method is shown in attached figure 2.
When the tail pipe 9 drills, referring to the attached drawing 3, firstly, the anchoring mechanism 6 is enabled to act through a drilling fluid pulse signal to realize anchoring with the reaming driving mechanism 3, the motor 8 drives the reaming bit 2 while drilling to rotate, meanwhile, the anchoring mechanism 6 and the reaming driving mechanism 3 drive the auxiliary reaming bit 2 to rotate, the drill rod 15 and the tail pipe 9 serve as drilling tools to perform sliding drilling, the synchronous drilling and auxiliary reaming are realized, and an inner pipe column above the motor 8 and the tail pipe 9 do not rotate; during composite drilling, the wellhead rotates the rotary table and the drill rod 15, the drill rod 15 and the motor 8 act together to realize composite drilling, and the tail pipe 9 is put into an open hole well while drilling.
After the drilling of the tail pipe 9 is finished, anchoring between the anchoring mechanism 6 and the reaming driving mechanism 3 is firstly released through a drilling fluid pulse signal, pressure is suppressed to open the pressure transmitting mechanism 16, hydraulic pressure is transmitted to an annular space between the tail pipe 9 and the inner pipe 10, a pressure cavity is formed between the expansion cone 14 and the sealing plug 17, the sealing plug 17 is axially limited on the inner pipe 10, the expansion cone 14 moves upwards and hydraulically seats the expansion hanger 13, and the tail pipe 9 is suspended and sealed in the upper sleeve 18. After the drilling rod 15 is hung, the sealing plug 17, the motor 8 and the reaming-while-drilling drill bit 1 are lifted out of the well mouth at one time, and are recycled once to form a smooth shaft, so that the requirement of subsequent drilling operation is met.
The utility model adopts the drilling reaming mode combining the reaming-while-drilling bit 1 and the auxiliary reaming bit 2, can realize the downward insertion of the tail pipe 9 while drilling, and can realize the rotary guide drilling and the measurement while drilling; after the tail pipe is drilled, the drilling tool can be completely recycled, the tail pipe 9 can be used as a technical casing for well completion, the back connection of the tail pipe 9 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 (7)
1. A tail pipe drilling assembly for directional tail pipe drilling comprises an outer pipe column and an inner pipe column, and is characterized in that: the outer pipe column comprises an auxiliary reaming bit (2) with a hollow structure, a reaming driving mechanism (3) connected to the upper part of the auxiliary reaming bit (2), a rotary sealing mechanism (4) and a tail pipe (9) component; the inner pipe column comprises a reaming-while-drilling drill bit (1) extending out of the auxiliary reaming drill bit (2), a bottom drilling assembly (7), an anchoring mechanism (6), a motor (8) and an inner pipe (10) component, wherein the anchoring mechanism (6), the motor (8) and the inner pipe are positioned in the outer pipe column; the expansion hanger (13) is connected with the inner pipe column and the outer pipe column;
the motor (8) is arranged on an inner pipe (10) above the anchoring mechanism (6), the drill bit (1) is driven to rotate while drilling through the drill rod (15), the anchoring mechanism (6) and the rotary sealing mechanism (4) drive the reaming driving mechanism (3) to drive the auxiliary reaming bit (2) to rotate, the tail pipe (9) does not rotate along with the auxiliary reaming bit (2), and rotary dynamic sealing is formed between the reaming driving mechanism (3) and the tail pipe (9) through the rotary sealing mechanism (4);
the upper part of the tail pipe (9) is connected with an expansion hanger (13), an expansion cone (14) and a sealing plug (17) are sequentially arranged in the expansion hanger (13) from top to bottom, a pressure transmission mechanism (16) is positioned between the expansion cone (14) and the sealing plug (17), and the pressure transmission mechanism (16) opens and communicates the inner space and the outer space of the inner pipe (10) under certain pressure;
the anchoring mechanism (6) is positioned in the reaming driving mechanism (3), and the anchoring release of the anchoring mechanism (6) in the reaming driving mechanism (3) are controlled through a drilling fluid pulse signal.
2. The liner drilling assembly for directional liner drilling according to claim 1, wherein: in an initial state, the anchor fluke (11) of the anchoring mechanism (6) is in a contraction state, and the anchor fluke (11) can extend out through a drilling fluid pulse signal, so that the anchoring mechanism (6) and the reaming driving mechanism (3) are anchored, and the auxiliary reaming bit (2) can synchronously drill along with the reaming-while-drilling bit (1) on the inner pipe (10).
3. A liner drilling assembly for directional liner drilling according to claim 1 or 2, wherein: and a sealing bearing (5) is arranged on the rotary sealing mechanism (4).
4. A liner drilling assembly for directional liner drilling according to claim 1 or 2, wherein: and a ball seat (12) is also arranged between the bottom drilling assembly (7) and the reaming-while-drilling bit (1).
5. A liner drilling assembly for directional liner drilling according to claim 1 or 2, wherein: the bottom hole assembly (7) comprises a bypass valve, a screw drill, a spiral stabilizer and a rotary guiding tool.
6. A liner drilling assembly for directional liner drilling according to claim 1 or 2, wherein: the bottom hole assembly (7) may comprise a measurement while drilling instrument.
7. The liner drilling assembly for directional liner drilling according to claim 6, wherein: the measurement while drilling instrument is LWD or MWD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921763816.4U CN211666637U (en) | 2019-10-21 | 2019-10-21 | Liner drilling assembly for directional liner drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921763816.4U CN211666637U (en) | 2019-10-21 | 2019-10-21 | Liner drilling assembly for directional liner drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211666637U true CN211666637U (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921763816.4U Active CN211666637U (en) | 2019-10-21 | 2019-10-21 | Liner drilling assembly for directional liner drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211666637U (en) |
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2019
- 2019-10-21 CN CN201921763816.4U patent/CN211666637U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230525 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: SINOPEC Group Patentee after: SINOPEC OILFIELD SERVICE Corp. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute Address before: 100101 Beichen West Road, Chaoyang District, Beijing 8 Beichen world center, block A 703. Patentee before: SINOPEC OILFIELD SERVICE Corp. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute |
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| TR01 | Transfer of patent right |