CN111075349B - Construction method of ground mining empty well suspension type well body structure - Google Patents
Construction method of ground mining empty well suspension type well body structure Download PDFInfo
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- CN111075349B CN111075349B CN201911328386.8A CN201911328386A CN111075349B CN 111075349 B CN111075349 B CN 111075349B CN 201911328386 A CN201911328386 A CN 201911328386A CN 111075349 B CN111075349 B CN 111075349B
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- well
- production casing
- shaped steel
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- slotted
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/08—Casing joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
- E21B33/0422—Casing heads; Suspending casings or tubings in well heads a suspended tubing or casing being gripped by a slip or an internally serrated member
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention relates to a construction method of a coal bed gas well, in particular to a construction method of a ground mining empty well suspension type well body structure. The technical problem of inclination after a slotted production casing is put into a three-open well of a hollow well is solved. The three-opening well body structure is used, the three-opening well body, the two-opening well body and the three-opening well body are perpendicular to the ground, 3 upper fan-shaped steel cones with the same size and shape are welded on the side wall of the tail end of the production casing pipe at the two-opening section, 3 lower fan-shaped steel cones are welded on the outer wall of the top of the three-opening section slotted production casing pipe, then the slotted production casing pipe is placed into the well, the lower fan-shaped steel cones on the slotted production casing pipe are connected with the upper fan-shaped steel cones on the production casing pipe in a clamping mode, the slotted production casing pipe and the production casing pipe are connected in a fastening mode, the inclination of the slotted production casing pipe and the production casing pipe is prevented, the smoothness of the three-opening well is guaranteed, and well repairing equipment is guaranteed to be smoothly placed into the well bottom to carry out well repairing operation in a targeted mode.
Description
Technical Field
The invention relates to a construction method of a coal bed gas well, in particular to a construction method of a ground mining empty well suspension type well body structure.
Background
At present, an air drilling machine is mainly used for drilling a goaf, a vertical three-opening shaft structure is adopted, however, as shown in fig. 1, after one-opening, two-opening and three-opening are completed, when a slotted production casing needs to be put into a three-opening shaft, the slotted production casing is caused to be smaller than the three-opening, so that the slotted production casing is difficult to keep a vertical state when the slotted production casing is put into the three-opening shaft, the form of the slotted production casing is finally in an inclined state, a wall protection effect cannot be well achieved, when a three-opening open hole collapse accident is handled, equipment such as drift diameter gauges and the like are easy to block, cannot be put into an artificial well bottom, and the drifting quality is seriously affected.
Disclosure of Invention
The invention provides a construction method of a ground hollow mining well suspension type well body structure, aiming at solving the technical problem that a slotted production casing is inclined after a three-well is put into a hollow mining well.
The technical scheme of the invention is that the construction method of the ground mining empty well suspension type well body structure uses a three-opening well body structure, wherein the first opening of the well adopts a phi 311.15mm air hammer to drill to the position of the basement rock under the topsoil layer, and a phi 273.00mm surface casing is put in for well cementation; drilling a second well by adopting an air hammer with the diameter phi of 241.30mm to a coal seam goaf roof to slowly sink and bring the roof to a fracture zone area, putting a production casing with the diameter phi of 193.70mm, and cementing from the position of the last water-bearing layer above a second final hole; and a third well is drilled to a final hole at a position of about 10m of a bottom plate of a 3# coal seam goaf by adopting a phi 171.50mm air hammer, a phi 139.70mm slotted production casing is put into the third well for wall protection, no well cementation operation is carried out, the first well, the second well and the third well are all arranged vertical to the ground, cement at the second well cementation section returns to the ground, 3 upper fan-shaped steel cones with the same size and shape are welded on the inner side wall at the tail end of the 193.70mm slotted production casing at the second well cementation section, the upper fan-shaped steel cones are uniformly distributed and are thin and wide at the upper part, 3 lower fan-shaped steel cones are welded on the outer wall at the top of the phi 139.70mm slotted production casing at the third well cementation section, the lower fan-shaped steel cones are uniformly distributed and are wide and thin at the upper part and the lower fan-shaped steel cones are clamped with the upper fan-shaped steel cones on the production casing.
The vertical slotted production casing can ensure that workover equipment can smoothly go into the shaft bottom to pertinently develop workover operation under the conditions that a gas production channel is blocked due to factors such as goaf collapse, water accumulation and the like in a goaf.
In summary, the invention relates to a construction method for ensuring that a three-slot production casing is vertical by designing a suspension mechanical device, which mainly solves the following technical problems:
(1) aiming at the current situation that a three-section slotted production casing of an empty mining well inclines, a suspension mechanical device consisting of an upper fan-shaped steel cone and a lower fan-shaped steel cone is developed, the suspension problem of the three-section slotted production casing of the empty mining well is solved due to simple operation, and the continuity and the stability of a three-section slotted production casing structure of the empty mining well are ensured;
(2) according to the stress requirement of a suspension mechanical device formed by the three-opening section, the two-opening section well cementation strength is improved, and the stress damage to a two-opening production casing pipe when a three-opening section well wall collapses is reduced;
(3) under the condition that the goaf collapses, the coal bed gas migration channel is blocked by factors such as water accumulation and the like in the goaf, the vertical slotted production casing can ensure that workover equipment can be smoothly put into the bottom of the well to carry out workover operation in a targeted manner.
Drawings
FIG. 1 is a prior art completion configuration diagram;
FIG. 2 is a schematic diagram of a completion of the process of the present invention;
FIG. 3 is a schematic view of a structure of a connection region;
FIG. 4 is a schematic structural view of an upper fan-shaped steel cone;
FIG. 5 is a top view of the upper steel cone;
FIG. 6 is a top view of the lower steel cone;
FIG. 7 is a top view of the fan-shaped steel cone composite structure.
Detailed Description
As shown in figure 2, the construction method of the ground mining empty well suspended type well body structure uses a three-opening well body structure, wherein an opening well 1 adopts a phi 311.15mm air hammer to drill to the position of a basement rock under a surface soil layer, and a phi 273.00mm surface casing is put into the opening well for well cementation; drilling a second well 2 to a coal seam goaf top plate slowly sinking and bringing to a fracture zone area by adopting an air hammer with the diameter of phi 241.30mm, descending a production casing 3 with the diameter of phi 193.70mm, and cementing from the position of the last water-bearing layer above a second opening final hole point; the three-well 7 adopts a phi 171.50mm air hammer to drill a final hole at a position of about 10m of a bottom plate of a coal seam goaf, a phi 139.70mm slotted production casing 4 is put in to perform wall protection, no well cementation operation is performed, the first-well, the second-well and the third-well are all arranged vertical to the ground, cement 6 at the second-well cementing section returns to the ground, 3 upper fan-shaped steel cones 9 with the same size and shape are welded on the inner side wall at the tail end of the 193.70mm production casing 3 at the second-well, as shown in figures 4 and 5, the upper fan-shaped steel cones 9 are uniformly distributed, the upper fan-shaped steel cones are thin and wide at the upper part, as shown in figure 6, 3 lower fan-shaped steel cones 10 are welded on the outer wall at the top of the phi 139.70mm slotted production casing 4 at the third-well, the lower fan-shaped steel cones are uniformly distributed along the pipe wall, the steel cones are wide and thin at the upper part and the lower part, as shown in figures 2 and 7, after the slotted production casing 4 is put in the three-well, forming a stable connection structure 8.
The upper part of the three-open-well slotted production casing 4 is connected with a reducing device which is phi 139.70mm to phi 193.70mm, and the reducing device is connected with phi 193.70mm reverse counter wires. The joint of the slotted production casing 4 and the production casing 3 is kept closed, and normal gas production operation is ensured.
When the slot production casing 4 is lowered, the top end of the slot production casing 4 is connected with a drill rod through a reverse counter thread, when the slot production casing is lowered to a position near a preset position, the drill rod is slowly rotated positively to enable a lower fan-shaped steel cone (a hanging device) of the three-opening-section slot production casing and an upper fan-shaped steel cone (a supporting device) of the two-opening-well technical casing to be meshed, after complete meshing, the drill rod is continuously rotated positively to enable the drill rod and the slot production casing to be completely separated, and the operation of the three-opening-well lower slot production casing is completed.
The key technology of the invention comprises the following steps:
(1) welding process of hanging device (lower fan-shaped steel cone) and supporting device (upper fan-shaped steel cone)
The steel cone material that the device of relying on and supporting device chose for use is the same with technical sleeve pipe material, carries out butt welding to carry out corresponding ultrasonic inspection, require welding tensile strength should satisfy three slots production sleeve pipe and depend on the requirement, and can bear the shearing force that certain stratum dislocation produced.
(2) The two-open cementing section is raised to the ground from about 180 meters of the original cement height return, so that the two-open cementing strength is improved, the stress damage to the two-open production casing pipe when the three-open section well wall collapses is reduced, and the integrity of the whole well body structure is ensured.
(3) Meshing design and construction of two-opening section and three-opening section suspension mechanical device
1) Firstly, a suspension device is additionally arranged on a two-opening section phi 193.70mm technical casing, the specific design method is that 3 fan-shaped steel cones with the same size and shape are welded in the inner space at the tail end of the last technical casing, the fan-shaped steel cones are uniformly distributed, the steel cones are thin at the top and thick at the bottom so as to be convenient for the suspension of the three-opening slot production casing, and the schematic diagrams of the steel cones and the suspension device are respectively shown in the attached figures 4 and 5;
2) the three-opening section phi 139.70mm slotted production casing is additionally provided with a hanging device, the specific design method is that 3 steel cones with the same size and shape are welded outside the slotted production casing at a preset position in advance, the steel cones are uniformly distributed, the material of the steel cones is the same as the specification of a two-opening suspension device, the steel cones are thick in the upper part and thin in the lower part in the direction so as to be conveniently butted with a two-opening technical casing, and the hanging device is shown in an attached figure 6;
3) the upper part of the three-slot production casing is connected with a reducing device which is phi 139.70mm to phi 193.70mm, and the reducing device is connected with phi 193.70mm reverse wire alignment;
4) when the slotting production casing is lowered, the top end of the first slotting production casing is connected with the drill rod through a reverse counter wire, when the slotting production casing is lowered to the position near the preset position, the drill rod is slowly rotated positively to enable the three-opening-section slotting production casing hanging device and the two-opening-technology casing supporting device to carry out meshing operation, and after complete meshing operation, the drill rod is continuously rotated positively to enable the drill rod and the slotting production casing to be completely separated, so that the three-opening-section slotting production casing operation is completed.
The invention is researched and developed by national key laboratories of Jinzao coal group coal and coalbed methane co-mining.
Claims (2)
1. A construction method of a ground mining empty well suspension type well body structure is characterized by comprising the following steps: using a three-opening well body structure, drilling a well (1) to the position of a basement rock under a topsoil layer by adopting a phi 311.15mm air hammer, and putting a phi 273.00mm surface casing pipe for well cementation; drilling a second open well (2) to a coal seam goaf roof by adopting a phi 241.30mm air hammer to slowly sink and bring the roof to a fracture zone area, descending a phi 193.70mm production casing (3), and cementing from the position of the last layer of water-bearing layer above a second open final hole point; the three-well (7) adopts a phi 171.50mm air hammer to drill a final hole at a position of about 10m of a bottom plate of a coal seam goaf, a phi 139.70mm slotted production casing (4) is put in to protect the wall, no well cementation operation is carried out, a first well-opened body, a second well-opened body and a third well-opened body are all arranged vertical to the ground, cement (6) at the second well-opened section returns to the ground, 3 upper fan-shaped steel cones (9) with the same size and shape are welded on the inner side wall of the tail end of a 193.70mm slotted production casing (3) at the second well-opened section, the upper fan-shaped steel cones (9) are uniformly distributed along the pipe wall, the upper fan-shaped steel cones are thin and wide at the upper part and the lower part, 3 lower fan-shaped steel cones (10) are welded on the outer wall at the top of the phi 139.70mm slotted production casing (4) at the third well-opened section, the lower fan-shaped steel cones are uniformly distributed along the pipe wall, the upper fan-shaped steel cones (10) and the upper fan-shaped steel cones are sleeved together, forming a stable connection structure (8).
2. The construction method of the ground mining empty well suspended type well structure according to claim 1, characterized in that: the upper part of a three-open-well slotted production casing (4) is connected with a reducing device with phi 139.70mm to phi 193.70mm, the reducing device is connected with a reverse wire pair with phi 193.70mm, when the slotted production casing (4) is placed downwards, the top end of the slotted production casing is connected with a drill rod through the reverse wire pair, when the drill rod is placed downwards into the slotted casing to be close to a preset position, the drill rod is slowly rotated forwards to enable a lower fan-shaped steel cone of the three-open-section slotted production casing to be meshed with an upper fan-shaped steel cone of the two-open-well technical casing, and after complete meshing, the drill rod is continuously rotated forwards to enable the drill rod to be completely separated from the slotted production casing, so that the three-open-well lower slotted production casing operation is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911328386.8A CN111075349B (en) | 2019-12-20 | 2019-12-20 | Construction method of ground mining empty well suspension type well body structure |
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| CN201911328386.8A CN111075349B (en) | 2019-12-20 | 2019-12-20 | Construction method of ground mining empty well suspension type well body structure |
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| CN111075349B true CN111075349B (en) | 2021-08-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112145132A (en) * | 2020-10-12 | 2020-12-29 | 山西晋城无烟煤矿业集团有限责任公司 | Well drilling method for extracting coal bed gas of adjacent closed goaf group |
| CN114165190A (en) * | 2021-12-10 | 2022-03-11 | 四川川油天然气科技股份有限公司 | Method for ensuring smooth entry of hydrogen storage well casing and continuous and stable operation |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2530019Y (en) * | 2001-12-07 | 2003-01-08 | 金红玲 | Rotary tailpipe hanging device |
| CN101343991A (en) * | 2008-08-13 | 2009-01-14 | 中国石油天然气股份有限公司 | Single bore diameter well completion structure and well completion method |
| CN101403281A (en) * | 2008-11-21 | 2009-04-08 | 大庆石油管理局 | Tail pipe well drilling and well completion technique |
| CN103147709A (en) * | 2011-12-07 | 2013-06-12 | 韦特柯格雷公司 | Casing hanger lockdown with conical lockdown ring |
| CN107269233A (en) * | 2017-08-16 | 2017-10-20 | 成都理工大学 | One kind meets profit self-expanding packing centralizer |
| CN107401393A (en) * | 2017-07-31 | 2017-11-28 | 山西晋城无烟煤矿业集团有限责任公司 | Water pumping gas production integration goaf gas extraction well casing programme and its construction method |
| CN108331560A (en) * | 2018-01-29 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | A kind of coal bed gas surface well pumping method of minery containing water flooding |
| CN110331932A (en) * | 2019-07-11 | 2019-10-15 | 中煤科工集团重庆研究院有限公司 | Coal bed gas tail pipe well drilling method suitable for coal mine gob/wear goaf |
-
2019
- 2019-12-20 CN CN201911328386.8A patent/CN111075349B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2530019Y (en) * | 2001-12-07 | 2003-01-08 | 金红玲 | Rotary tailpipe hanging device |
| CN101343991A (en) * | 2008-08-13 | 2009-01-14 | 中国石油天然气股份有限公司 | Single bore diameter well completion structure and well completion method |
| CN101403281A (en) * | 2008-11-21 | 2009-04-08 | 大庆石油管理局 | Tail pipe well drilling and well completion technique |
| CN103147709A (en) * | 2011-12-07 | 2013-06-12 | 韦特柯格雷公司 | Casing hanger lockdown with conical lockdown ring |
| CN107401393A (en) * | 2017-07-31 | 2017-11-28 | 山西晋城无烟煤矿业集团有限责任公司 | Water pumping gas production integration goaf gas extraction well casing programme and its construction method |
| CN107269233A (en) * | 2017-08-16 | 2017-10-20 | 成都理工大学 | One kind meets profit self-expanding packing centralizer |
| CN108331560A (en) * | 2018-01-29 | 2018-07-27 | 中煤科工集团重庆研究院有限公司 | A kind of coal bed gas surface well pumping method of minery containing water flooding |
| CN110331932A (en) * | 2019-07-11 | 2019-10-15 | 中煤科工集团重庆研究院有限公司 | Coal bed gas tail pipe well drilling method suitable for coal mine gob/wear goaf |
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