CN113123721A - Liner drilling assembly for liner drilling - Google Patents
Liner drilling assembly for liner drilling Download PDFInfo
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- CN113123721A CN113123721A CN202010029075.8A CN202010029075A CN113123721A CN 113123721 A CN113123721 A CN 113123721A CN 202010029075 A CN202010029075 A CN 202010029075A CN 113123721 A CN113123721 A CN 113123721A
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- 238000005553 drilling Methods 0.000 title claims abstract description 173
- 238000007789 sealing Methods 0.000 claims abstract description 62
- 230000005540 biological transmission Effects 0.000 claims description 21
- 210000002445 nipple Anatomy 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 11
- 239000007858 starting material Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/04—Electric drives
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a tail pipe drilling assembly for tail pipe drilling, which comprises a reaming-while-drilling drill bit, an auxiliary reaming drill bit, a reaming driving mechanism, a rotary sealing mechanism, a motor, a tail pipe and a drill pipe, wherein the reaming driving mechanism is respectively connected with the auxiliary reaming drill bit and the tail pipe, the reaming-while-drilling drill bit is connected with the drill pipe, the rotary sealing mechanism is arranged between the drill pipe and the reaming driving mechanism as well as between the drill pipe and the tail pipe at the bottom, the motor drives the reaming-while-drilling drill bit to rotate through the drill pipe, and the rotary sealing mechanism drives the reaming driving mechanism to drive the auxiliary reaming drill bit to rotate and form continuous rotary sealing matching between the tail pipe and the drill pipe. The drilling machine adopts a drilling reaming mode combining the reaming-while-drilling drill bit and the auxiliary reaming drill bit, and after drilling by the tail pipe, drilling tools can be completely recovered, so that conditions are provided for subsequent drilling, and the problems of leakage and unstable well bore are solved, thereby reducing underground accidents, improving the drilling safety and reducing the drilling risk.
Description
Technical Field
The invention relates to the field of well drilling and completion tools in the petroleum and gas industry, in particular to a tail pipe drilling assembly for tail pipe drilling, which can realize tail pipe drilling 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.
Disclosure of Invention
The invention provides a tail pipe drilling assembly for tail pipe drilling, which is used as a key core component of the tail pipe drilling and can solve the problems of tail pipe drilling and drilling tool recovery, and the tail pipe can serve as a technical casing after well completion and can continue drilling after sealing a complex stratum.
The technical scheme of the invention is as follows:
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 invention has the advantages that:
(1) the invention adopts a drilling reaming mode combining the reaming-while-drilling drill bit and the auxiliary reaming drill bit, and can realize the downward insertion of the tail pipe while drilling;
(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 representation of a liner drilling with an expansion casing according to the present invention;
FIG. 3 is a schematic representation of another liner drilling with expansion suspension 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 invention can be matched with an expansion casing 11 and an expansion hanger 15 to realize expansion type tail pipe 14 drilling operation, and can also be matched with a conventional high torsion resistant tail pipe 14 and an expansion hanger 15 to realize expansion suspension type tail pipe 14 drilling operation, and two embodiments are provided according to different types of tail pipes 14.
Example 5:
referring to the attached figure 2, the expandable liner drilling operation is carried out by matching with an expansion casing 11, the expandable expansion casing 11 is arranged above a tail pipe 14, the bottom of the expansion casing 11 is provided with a section of pre-expanded expansion starter 17, an expansion cone 12 is arranged in the expansion starter 17 in advance, the top of the expansion casing 11 is connected with an expansion hanger 15, and a plurality of sections of sealing rubber materials are solidified outside the expansion casing 11. 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.
The assembly of the invention and the expandable casing 11 are lowered into the well with the drill pipe 13, by means of which sliding drilling and composite drilling of the pipe string can be normally achieved. When normal slip is bored, motor 10 drives lower part drilling rod nipple joint 4 and reaming-while-drilling bit 1 and rotates, realizes reaming-while-drilling operation to drive reaming actuating mechanism 3 and supplementary reaming bit 2 rotation through rotary seal mechanism, realize 14 drilling of tail pipe and reaming-while-drilling operation simultaneously, but the tubular column that is located more than motor 10 is including expansion cone 12, drilling rod 13 and expansion sleeve 11 irrotational.
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 figure 3, the invention cooperates with a high anti-torsion tail pipe 14 and an expansion hanger 15 to carry out drilling and expansion hanging operations of the tail pipe 14, the upper part of the tail pipe 14 is directly connected with the expansion hanger 15, an expansion cone 12, a pressure transmitting hole 19 and a sealing plug 20 are arranged on a drill pipe 13 in the expansion hanger 15 in advance, the pressure transmitting hole 19 is positioned between the expansion cone 12 and the sealing plug 20, and a pressure transmitting mechanism 16 is opened and communicated with the inner space and the outer space of the drill pipe 13 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 while the liner hanger shown in example two is the expansion hanger 15, the present invention may also be used in conjunction with a conventional slip liner hanger for liner drilling operations.
The invention adopts a drilling reaming mode 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 |
|---|---|---|---|
| CN202010029075.8A CN113123721A (en) | 2020-01-12 | 2020-01-12 | Liner drilling assembly for liner drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010029075.8A CN113123721A (en) | 2020-01-12 | 2020-01-12 | Liner drilling assembly for liner drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113123721A true CN113123721A (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010029075.8A Pending CN113123721A (en) | 2020-01-12 | 2020-01-12 | Liner drilling assembly for liner drilling |
Country Status (1)
| Country | Link |
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| CN (1) | CN113123721A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151057A (en) * | 2021-12-08 | 2022-03-08 | 安徽理工大学 | Coal rock drilling high-pressure hydraulic fracturing experimental device and application method thereof |
| CN114753796A (en) * | 2022-04-18 | 2022-07-15 | 中煤科工生态环境科技有限公司 | Ground drilling device and anti-suction drilling method |
-
2020
- 2020-01-12 CN CN202010029075.8A patent/CN113123721A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151057A (en) * | 2021-12-08 | 2022-03-08 | 安徽理工大学 | Coal rock drilling high-pressure hydraulic fracturing experimental device and application method thereof |
| CN114151057B (en) * | 2021-12-08 | 2023-08-04 | 安徽理工大学 | Coal rock drilling high-pressure hydraulic fracturing experimental device and application method thereof |
| CN114753796A (en) * | 2022-04-18 | 2022-07-15 | 中煤科工生态环境科技有限公司 | Ground drilling device and anti-suction drilling method |
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