CN113863879B - Gas reverse circulation well drilling is with diverging device - Google Patents
Gas reverse circulation well drilling is with diverging device Download PDFInfo
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- CN113863879B CN113863879B CN202010607513.4A CN202010607513A CN113863879B CN 113863879 B CN113863879 B CN 113863879B CN 202010607513 A CN202010607513 A CN 202010607513A CN 113863879 B CN113863879 B CN 113863879B
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- lower joint
- guide body
- reverse circulation
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- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 10
- 239000011435 rock Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
Landscapes
- 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 gas reverse circulation well drilling flow dividing device, which comprises an upper joint, a locking sleeve, a rubber ring, an inner pipe, a lower joint and a flow guiding body, wherein: the upper joint and the lower joint are connected to form a hollow pipe column; the middle lower part of the lower joint is of a reducing structure, and a plurality of through holes A are formed in the middle; the rubber ring is sleeved on the upper joint; after the locking sleeve is connected with the upper joint, the rubber ring is limited between the locking sleeve and the lower joint; the guide body is of a cylindrical structure and sleeved in the lower joint, the guide body is provided with a through hole B corresponding to the circumferential through hole A of the lower joint, the wall of the guide body is axially provided with a plurality of through holes C which are penetrated up and down, the through holes C are arranged between the circumferential intervals of the through holes B, and the lower end of the guide body is in sealing connection with the lower joint; the inner tube is arranged in the hollow tubular column body of the upper joint and the lower joint, the lower end of the inner tube is in sealing connection and matching with the open end of the fluid director, and the inner tube is downwards communicated with the through hole C of the fluid director. The device is in soft contact with the well bore, the well bore can be better plugged, and when the block is dropped, the drill sticking can be avoided.
Description
Technical Field
The invention relates to the field of drilling devices, in particular to a flow dividing device for gas reverse circulation drilling.
Background
The process of circulating medium from the bottom of the well to carry cuttings back to the surface from the drill pipe center during drilling is known as reverse circulation center sampling drilling. Single, double or triple layer drill pipes are typically used, but double wall drill pipes are most common. The circulating medium is pressed in by the double-pipe annular space and returns from the center of the inner pipe with rock fragments, so the method is called double-pipe reverse circulation or double-wall drill rod reverse circulation drilling. With the continuous innovation of reverse circulation drilling theory and drilling technology, the reverse circulation drilling technology is increasingly widely applied to the fields of mineral exploration, water well drilling, petroleum drilling and the like. The positive and negative alternate gas reverse circulation drilling technology belongs to a form of reverse circulation drilling, and compared with an oil rig, the new equipment mainly comprises a gas box, a double-wall drill rod and an underground plugging shunt; the drilling tool structure is generally a water tap, an air box, a double-wall drilling tool, a downhole plugging shunt, a conventional drilling tool and a drill bit; in the drilling process, compressed air enters the annular space of the double-wall drill rod through the air box (namely, an annular space is formed by the inner layer of drill rod and the outer layer of drill rod), enters the conventional drill rod along the annular space, and then reaches the drill bit; the gas returned by the drill bit carries rock debris to enter the flow dividing device through the annular space between the conventional drill rod and the well bore, then enters the inner drill rod of the double-wall drill rod, and finally returns to the ground. In order to enable the rock carrying gas returned from the drill bit to enter the inner drill rod of the upper double-wall drill rod after passing through the flow dividing device, the outer diameter of the existing flow dividing device is generally close to the size of a well bore and is made of all-metal materials. But the outer diameter is close to the size of the well bore, and when the upper well wall is fallen off due to a large drop block, the drill sticking is easily caused at the position of the diverter.
Disclosure of Invention
The invention aims to solve the problem that the existing flow dividing device is easy to get stuck, and provides a flow dividing device for gas reverse circulation drilling.
The technical proposal is as follows:
the utility model provides a gas reverse circulation is diverging device for well drilling, includes top connection, lock sleeve, rubber ring, inner tube, lower clutch and baffle, wherein:
the upper end of the upper joint is provided with a joint connected with the double-wall drill rod, and the lower end of the upper joint is connected with the lower joint to form a hollow pipe column;
the upper end part of the lower joint is in an expanded boss structure, the middle lower part of the lower joint is in a reduced structure, the lower end of the lower joint is provided with a joint connected with a drilling tool, and the middle part of the lower joint is circumferentially provided with a plurality of through holes A;
the rubber ring is sleeved on the upper joint above the lower joint diameter-expanding boss structure;
after the locking sleeve is connected and matched with the upper joint, the rubber ring is limited between the locking sleeve and the lower joint;
the guide body is sleeved in the lower joint, the guide body is of a cylindrical structure with a closed bottom, a through hole B corresponding to the circumferential through hole A of the lower joint is arranged in the middle of the guide body, a plurality of through holes C which are penetrated up and down are arranged on the wall of the guide body along the axial direction, the through holes C are arranged between the circumferential intervals of the through holes B, and the lower end of the guide body and the lower joint form sealing connection fit;
the inner pipe is arranged in the hollow pipe column body of the upper joint and the lower joint, the upper end of the inner pipe is provided with a joint connected with the inner pipe of the double-wall drill pipe, the outer part of the joint is connected with the upper joint through a bracket, the lower end of the inner pipe is in sealing connection and matching with the open end at the upper part of the current carrier, the inner pipe and the inner pipe wall of the upper joint and the lower joint form an annular gap, the annular gap is communicated with the annular gap between the inner pipe and the outer pipe of the double-wall drill pipe upwards, and the annular gap is communicated with the through hole C of the current carrier downwards.
The above scheme further includes:
the rubber ring is sleeved on the upper joint through a locking mechanism.
The locking mechanism includes: go up compensation dish, fastening bolt, steel ring, pressure disk and lower compensation dish, wherein:
the upper compensation plate and the locking sleeve, and the lower compensation plate and the lower joint are matched through a key and a key slot; the rubber rings are arranged in a multistage axial mode and are respectively sleeved on the pressure plate; the steel ring is arranged in the pressure plate and is connected with the pressure plate through a fastening bolt; the multistage rubber rings are respectively limited between the upper compensation plate and the lower compensation plate after being sequentially connected through the pressure plate, the steel ring and the fastening bolts.
And the joint surfaces among the pressure plates of the multi-stage rubber rings, between the upper compensation plate and the pressure plate and between the lower compensation plate and the pressure plate are all provided with round holes C and cylinders for locking in sequence.
The inner surface of the pressure plate is provided with a plurality of rectangular grooves uniformly distributed along the circumferential direction, and hard alloy strips are arranged in the rectangular grooves.
Threads are arranged at the upper end and the lower end of the upper joint and the lower joint; the through holes A of the lower joint are symmetrically arranged, and the included angles between the axes of the through holes A and the corresponding guide body through holes B and the axis of the lower joint are acute angles.
The joint part between the inner wall of the lower joint and the outer wall of the guide body is in a ladder shape, two key grooves C are symmetrically arranged on the minimum inner cylindrical surface of the lower end, and the lower end of the guide body is connected with the lower joint through keys and the key grooves.
The upper end of the current carrier is limited by an elastic retainer ring; the lower end of the inner pipe is connected with the flow guiding body through threads.
The beneficial effects of the invention are as follows: the device is in soft contact with the well bore, so that the well bore can be better plugged, more gas carries rock debris to enter the inner drill rod of the double-wall drill rod, and when a block is dropped, the blocking of the drill can be avoided; the rubber ring and the pressure plate can rotate independently of the upper joint, so that the abrasion of the rubber ring can be reduced.
Drawings
FIG. 1 is a schematic diagram of a gas reverse circulation drilling diverter device according to the present invention;
FIG. 2 is a cross-sectional view of the upper compensating disk (4) of FIG. 1;
FIG. 3 is a cross-sectional view of the platen (8) of FIG. 1;
FIG. 4 is a cross-sectional view of the lower compensating disk (9) of FIG. 1;
fig. 5 is a front view of the current carrier (9) of fig. 1;
FIG. 6 is a right side view of the current carrier (9) of FIG. 1;
FIG. 7 is a cross-sectional view at A-A of FIG. 1;
FIG. 8 is a cross-sectional view at B-B in FIG. 1;
FIG. 9 is a cross-sectional view at C-C in FIG. 1;
FIG. 10 is a cross-sectional view at D-D in FIG. 1;
fig. 11 is a schematic view of the gas reverse circulation drilling diverter device in a downhole operation.
1-11, upper joint, 2, inner tube, 3, locking sleeve, 4, upper compensating disc, 5, rubber ring, 6, fastening bolt, 7, steel ring, 8, pressure plate, 9, lower compensating disc, 10, lower joint, 11, circlip, 12, 13, 14, sealing ring, 15, deflector, 16, cemented carbide cylinder, 17, cemented carbide bar, 21, outer drill rod, 22, inner drill rod, 23, annular gap (also called), 24, well wall, 25, conventional drilling tool, 26, drill bit, 201, keyway A,401, key A,402, round hole B,801, rectangular groove, 802, 803, round hole C,901, round hole D,902, key B,1001, keyway B,1002, through hole A,1003, keyway C,1501 through hole B,1502, key C,1503, fan-shaped through hole C.
Detailed Description
Further details will be described below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, a gas reverse circulation well drilling flow dividing device comprises an upper joint 1, a locking sleeve 3, a rubber ring 5, an inner pipe 2, a lower joint 10 and a flow guiding body 15, wherein:
the upper end of the upper joint 1 is provided with a joint connected with a double-wall drill rod, and the lower end of the upper joint is connected with the lower joint 10 to form a hollow pipe column;
the upper end part of the lower joint 10 is of an expanded boss structure, the middle lower part of the lower joint 10 is of a reduced diameter structure, the lower end is provided with a joint connected with a drilling tool, and the middle part is circumferentially provided with a plurality of through holes A1002;
the rubber ring 5 is sleeved on the upper joint 1 above the expanding boss structure of the lower joint 10;
after the locking sleeve 3 is connected and matched with the upper joint 1, the rubber ring 5 is limited between the locking sleeve 3 and the lower joint 10;
referring to fig. 5 and 6, the fluid director 15 is sleeved in the lower joint 10, the fluid director 15 is in a cylindrical structure with a closed bottom, a through hole B1501 corresponding to a through hole a1002 in the circumferential direction of the lower joint 10 is arranged in the middle of the fluid director 15, a plurality of through holes C1503 which are penetrated up and down are arranged on the wall of the fluid director 15 along the axial direction, the through holes C1503 are arranged between the circumferential intervals of the through holes B1503, and the lower end of the fluid director 15 and the lower joint form a sealing connection fit;
the inner pipe 2 is arranged in the hollow pipe column body of the upper joint 1 and the lower joint 10, the upper end of the inner pipe 2 is provided with a joint connected with the inner pipe of the double-wall drill pipe, the outer part of the joint is connected with the upper joint 1 through a bracket, the lower end of the joint is in sealing connection fit with the open end at the upper part of the fluid director 15, the inner pipe 2 and the inner pipe wall of the upper joint 1 and the lower joint 10 form an annular gap, the annular gap is communicated with the annular gap between the inner pipe and the outer pipe of the double-wall drill pipe upwards, and the annular gap is communicated with the through hole C1503 of the fluid director 15 downwards.
Example 2
Referring to fig. 1 to 10, on the basis of the above embodiment 1, further comprising:
the rubber ring 5 is sleeved on the upper joint 1 through a locking mechanism.
The locking mechanism includes: upper compensating plate 4, fastening bolt 6, steel ring 7, pressure disk 8 and lower compensating plate 9, wherein:
the upper compensation plate 4 is matched with the locking sleeve 3, and the matching surfaces of the lower compensation plate 9 and the lower joint 10 are fixed through keys and key grooves; the rubber rings 5 are arranged in a multistage axial mode and are respectively sleeved on the pressure plate 8; the steel ring 7 is arranged in the pressure plate 8, and the steel ring 7 is connected with the pressure plate 8 through the fastening bolt 6; the multistage rubber rings 5 are respectively limited between the upper compensation plate 4 and the lower compensation plate 9 after being sequentially connected through the pressure plate 8, the steel ring 7 and the fastening bolts 6.
The joint surfaces among the pressure plates 8 of the multistage rubber rings 5, the upper compensation plate 4 and the pressure plates 8 and the lower compensation plate 9 and the pressure plates 8 are sequentially locked through round holes C802 and cylinders 19.
The inner surface of the pressure plate 8 is provided with a plurality of rectangular grooves 801 which are uniformly distributed along the circumferential direction, and hard alloy strips 18 are arranged in the rectangular grooves.
Threads are arranged at the upper end and the lower end of the upper joint 1 and the lower joint 10; the through holes A1002 of the lower joint 10 are symmetrically arranged, and the included angle between the axes of the through holes A1002 and the corresponding through holes B1501 of the guide body 15 and the axis of the lower joint 10 is an acute angle.
The joint part of the inner wall of the lower joint 10 and the outer wall of the guide body 15 is in a ladder shape, two key grooves C1003 are symmetrically arranged on the minimum inner cylindrical surface of the lower end, and the lower end of the guide body 15 is connected with the lower joint 10 through keys and key grooves.
The upper end of the current carrier 15 is limited by the circlip 11; the lower end of the inner tube 2 is connected with the guide body 15 through threads.
Example 3
Fig. 1 is a schematic structural diagram of a gas reverse circulation well drilling flow dividing device, which consists of an upper joint (1), an inner pipe (2), a locking sleeve (3), an upper compensation disc (4), a rubber ring (5), bolts (6), a steel ring (7), a pressure plate (8), a lower compensation disc (9), a lower joint (10), an elastic retainer ring (11) and a flow guiding body (15). Wherein the upper joint (1) and the lower joint (10) are connected together through threads; the inner hole of the locking sleeve (3) is provided with threads, and the outer surface of the lower end of the locking sleeve is provided with a plurality of key grooves A (201); the upper end surface of the upper compensation disc (4) is provided with a plurality of raised keys A (401); the lower end surface of the lower compensation disc (9) is provided with a plurality of raised keys B (902); the outer surface of the upper end of the lower joint (10) is provided with a plurality of key grooves B (1001); the upper compensation disc (4), the pressure disc (8) and the lower compensation disc (9) are sequentially sleeved at the middle part of the upper joint (1); the locking sleeve (3) is connected with the upper joint (1) through threads; the convex key A (401) of the upper compensation disc (4) is inserted into the key slot A (301) of the locking sleeve (3); the convex key B (902) of the lower compensation disc (9) is inserted into the key groove B (1001) of the lower joint (10); the rubber ring (5) is sleeved on the pressure plate (8); the steel ring (7) is arranged in the pressure plate (8), and the steel ring (7) is connected with the pressure plate (8) through the fastening bolt (6); the guide body (15) is arranged in the lower joint (10), the guide body and the lower joint are connected together in a key-slot mode, and sealing rings (13 and 14) are arranged between the guide body and the lower joint; the upper end of the current carrier (15) is limited by an elastic retainer ring (11); the inner tube (2) is arranged in the upper joint (1), the lower end of the inner tube (2) is connected with the guide body (15) through threads, and a sealing ring (12) is arranged between the inner tube and the guide body.
The upper joint (1) is of a hollow structure, threads are arranged at the upper end and the lower end of the upper joint, a plurality of round holes A (101) with certain depth are uniformly distributed on the outer cylindrical surface with the largest diameter along the axial direction and the circumferential direction, and a hard alloy cylinder (17) is arranged in the round holes A (101).
The lower joint (10) is of a hollow structure, threads are arranged at the upper end and the lower end of the lower joint, the outer surface of the lower joint is in a stepped shape, two symmetrical through holes A (1002) are arranged on the outer cylindrical surface with the smallest diameter, and an included angle between the axis of the through hole A (1002) and the axis of the lower joint (10) is an acute angle; the inner hole is stepped, and two key grooves C (1003) are symmetrically arranged on the inner cylindrical surface with the smallest diameter.
Fig. 2 shows that the lower end surface of the upper compensation disc (4) is provided with a plurality of round holes B (402) which are uniformly distributed along the circumferential direction and have a certain depth, and a hard alloy cylinder (16) is arranged in the round holes B (402).
Fig. 3 shows that the upper end surface and the lower end surface of the pressure plate (8) are respectively provided with a plurality of round holes C (802, 803) which are uniformly distributed along the circumferential direction and have a certain depth, and hard alloy cylinders (19) are arranged in the round holes C (802, 803); the inner surface of the steel plate is provided with a plurality of rectangular grooves (801) uniformly distributed along the circumferential direction, and hard alloy strips (18) are arranged in the rectangular grooves (801).
Fig. 4 shows that the upper end surface of the lower compensation disc (9) is provided with a plurality of round holes D (901) which are uniformly distributed along the circumferential direction and have a certain depth, and a hard alloy cylinder (20) is arranged in the round holes D (901).
The flow guiding body (15) shown in fig. 5 and fig. 6 is of a tubular structure with one end open and one end closed, the outer surface is in a stepped shape, two radial through holes B (1501) are symmetrically arranged on the pipe wall, the included angle between the axis of the through holes B (1501) and the axis of the flow guiding body (15) is an acute angle, two fan-shaped through holes (1503) along the axis direction are symmetrically arranged on the pipe wall, and two keys C (1502) are symmetrically arranged on the outer cylindrical surface with the smallest diameter.
The 4 raised keys a (401) of the upper compensating disk (4) shown in fig. 7 are inserted into the 4 key grooves a (301) of the locking sleeve (3).
The 3 raised keys B (902) of the lower compensation plate (9) shown in fig. 8 are inserted into the 3 key grooves B (1001) of the lower joint (10).
The two through holes a (1002) of the lower joint (10) and the two through holes B (1501) of the fluid guide body (15) are in communication as shown in fig. 9.
Two keys C (1502) of the current carrier (15) shown in fig. 10 are inserted into two key grooves C (1003) of the lower joint (10), respectively.
As shown in fig. 11, when the gas reverse circulation well drilling shunt device works underground, the structure of the upper and lower pipe strings is as follows: the double-wall drill rod (comprising an inner drill rod (22) and an outer drill rod (21), wherein an annulus (23) is arranged between the inner drill rod and the outer drill rod), a gas reverse circulation drilling flow dividing device, a conventional drilling tool (25) and a drill bit (26) are arranged between the inner drill rod and the outer drill rod. The upper end of an upper joint (1) of the gas reverse circulation drilling flow dividing device is connected with an inner drill rod (22) of the double-wall drill rod through threads; in the drilling process, wellhead compressed air enters an annulus (23) of a double-wall drill rod through a gas box to reach underground, sequentially passes through an annulus formed by an upper joint (1) and an inner pipe (2) of a gas reverse circulation drilling flow dividing device and a fan-shaped through hole (1503) of a flow guiding body (15), then enters a conventional drilling tool (25), reaches a drill bit (26), and is discharged by the drill bit (26); because the rubber ring (5) of the diverting device for gas reverse circulation drilling effectively blocks the annulus between the conventional drilling tool (25) and the well wall (24), most of gas carries rock debris to enter the inner pipe (2) after passing through the two through holes A (1002) of the lower joint (10) and the two through holes B (1501) of the diversion body (15), then enters the inner pipe (22) of the double-wall drill rod, and finally returns to the ground.
Claims (6)
1. The utility model provides a gas reverse circulation is diverging device for well drilling, includes top connection (1), lock sleeve (3), rubber ring (5), inner tube (2), lower clutch (10) and water conservancy diversion body (15), characterized by: the upper end of the upper joint (1) is provided with a joint connected with a double-wall drill rod, and the lower end of the upper joint is connected with the lower joint (10) to form a hollow pipe column; the upper end part of the lower joint (10) is of an expanded boss structure, the middle lower part of the lower joint (10) is of a reduced diameter structure, the lower end is provided with a joint connected with a drilling tool, and the middle part of the lower joint is circumferentially provided with a plurality of through holes A (1002); the rubber ring (5) is sleeved on the upper joint (1) above the expanding boss structure of the lower joint (10); after the locking sleeve (3) is connected and matched with the upper joint (1), the rubber ring (5) is limited between the locking sleeve (3) and the lower joint (10); the guide body (15) is sleeved in the lower joint (10), the guide body (15) is of a cylindrical structure with a closed bottom, a through hole B (1501) corresponding to a circumferential through hole A (1002) of the lower joint (10) is arranged in the middle of the guide body (15), a plurality of through holes C (1503) penetrating up and down are arranged on the wall of the guide body (15) along the axial direction, the through holes C (1503) are arranged between the circumferential intervals of the through holes B (1501), and the lower end of the guide body (15) and the lower joint form sealing connection fit; the inner pipe (2) is arranged in the hollow pipe column body of the upper joint (1) and the lower joint (10), the upper end of the inner pipe (2) is provided with a joint connected with the inner pipe of the double-wall drill pipe, the outside of the joint is connected with the upper joint (1) through a bracket, the lower end of the inner pipe is in sealing connection fit with the open end at the upper part of the current-carrying body (15), the inner pipe (2) and the inner pipe wall of the upper joint (1) and the lower joint (10) form an annular gap, and the annular gap is communicated with the annular gap between the inner pipe and the outer pipe of the double-wall drill pipe upwards and is communicated with a through hole C (1503) of the current-carrying body (15) downwards; the rubber ring (5) is sleeved on the upper joint (1) through a locking mechanism; the locking mechanism includes: go up compensation dish (4), fastening bolt (6), steel ring (7), pressure disk (8) and lower compensation dish (9), wherein: the upper compensation plate (4) is matched with the locking sleeve (3) and the lower compensation plate (9) is matched with the lower joint (10) in a positioning way through a key and a key groove; the rubber rings (5) are arranged in a multistage axial mode and are sleeved on the pressure plates (8) respectively; the steel ring (7) is arranged in the pressure plate (8), and the steel ring (7) is connected with the pressure plate (8) through the fastening bolt (6); the multistage rubber rings (5) are respectively limited between the upper compensation plate (4) and the lower compensation plate (9) after being sequentially connected through the pressure plate (8), the steel ring (7) and the fastening bolts (6).
2. The gas reverse circulation well drilling shunt device according to claim 1, wherein the butt joint surfaces among the pressure plates (8) of the multistage rubber rings (5), between the upper compensation plate (4) and the pressure plates (8) and between the lower compensation plate (9) and the pressure plates (8) are sequentially locked through round holes C (802) and cylinders (19).
3. The gas reverse circulation drilling shunt device according to claim 2, wherein: the inner surface of the pressure plate (8) is provided with a plurality of rectangular grooves (801) uniformly distributed along the circumferential direction, and hard alloy strips (18) are arranged in the rectangular grooves.
4. A gas reverse circulation drilling diverter according to claim 3, characterized in that: threads are arranged at the upper end and the lower end of the upper joint (1) and the lower joint (10); the through holes A (1002) of the lower connector (10) are symmetrically arranged, and the included angle between the axes of the through holes A (1002) and the through holes B (1501) of the corresponding guide bodies (15) and the axis of the lower connector (10) is an acute angle.
5. The gas reverse circulation drilling shunt device according to claim 4, wherein: the joint part of the inner wall of the lower joint (10) and the outer wall of the guide body (15) is in a ladder shape, two key grooves C (1003) are symmetrically arranged on the minimum inner cylindrical surface of the lower end of the lower joint (10), and the lower end of the guide body (15) is connected with the lower joint (10) through keys and the key grooves.
6. The gas reverse circulation drilling shunt device according to claim 5, wherein: the upper end of the current carrier (15) is limited by an elastic retainer ring (11); the lower end of the inner pipe (2) is connected with the guide body (15) through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010607513.4A CN113863879B (en) | 2020-06-30 | 2020-06-30 | Gas reverse circulation well drilling is with diverging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010607513.4A CN113863879B (en) | 2020-06-30 | 2020-06-30 | Gas reverse circulation well drilling is with diverging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113863879A CN113863879A (en) | 2021-12-31 |
| CN113863879B true CN113863879B (en) | 2023-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010607513.4A Active CN113863879B (en) | 2020-06-30 | 2020-06-30 | Gas reverse circulation well drilling is with diverging device |
Country Status (1)
| Country | Link |
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| CN (1) | CN113863879B (en) |
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| CN117803348A (en) * | 2022-09-30 | 2024-04-02 | 中国石油天然气集团有限公司 | While-drilling packing device and reverse circulation drilling equipment |
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