CN115045635A - Tool and method suitable for downhole pressurized well completion of gas and liquid drilling - Google Patents
Tool and method suitable for downhole pressurized well completion of gas and liquid drilling Download PDFInfo
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- CN115045635A CN115045635A CN202210636393.XA CN202210636393A CN115045635A CN 115045635 A CN115045635 A CN 115045635A CN 202210636393 A CN202210636393 A CN 202210636393A CN 115045635 A CN115045635 A CN 115045635A
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- 238000005553 drilling Methods 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000007788 liquid Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 105
- 238000012856 packing Methods 0.000 claims description 17
- 239000000725 suspension Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 2
- 239000002360 explosive Substances 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 2
- 239000003129 oil well Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- E21B33/12—Packers; Plugs
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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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
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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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells for setting packers
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
Abstract
The invention discloses a tool and a method suitable for gas and liquid drilling downhole under-pressure well completion. The tool comprises an upper drill rod combination (1), a stratum packer tool combination (2), a production zone tool combination (3) and a tubing combination (4); when the drilling pipe column is normally drilled, the upper drill rod combination (1), the stratum packer tool combination (2) and the production layer tool combination (3) are sequentially connected from top to bottom to form the drilling pipe column for drilling operation; when the production is carried out, the oil pipe combination (4), the stratum packer tool combination (2) and the production layer tool combination (3) are sequentially connected from top to bottom to form a well completion pipe column for production operation. The invention realizes the integration of drilling and completion, reduces the cost of drilling and completion and improves the development benefit of oil and gas resources; the risk of well completion operation is reduced; the application range is wide, and the method can be used for gas under-pressure well drilling and completion and liquid under-balance well drilling and completion; the drilling and completion method is suitable for well track drilling and completion of vertical wells, inclined wells and horizontal wells; can be simultaneously suitable for the packer of the production zone in the sleeve and the packer of the barefoot production zone.
Description
Technical Field
The invention relates to the field of petroleum and natural gas-liquid well drilling and completion, in particular to a method suitable for gas and liquid well drilling downhole pressurized well completion.
Background
The well completion refers to a process of communicating a well bottom and an oil layer in a certain structure after an open hole well reaches a designed well depth. It is the last important link of well drilling work, and the beginning of oil production engineering, and is closely connected with the development of oil production, water injection and whole oil-gas field. The quality of well completion of an oil well directly influences the production capacity and the economic life of the oil well, and even relates to whether the whole oil field can be reasonably developed.
The reservoir pollution is serious due to the conventional well completion operation, the yield is reduced after the well completion operation, and the stable yield of the oil-gas well is influenced; in order to effectively protect a reservoir and exert the production capacity of an oil and gas well, the well completion can be preferably completed in a pressurized operation mode, and a method suitable for downhole pressurized well completion of gas and liquid drilling needs to be deeply researched.
A pressurized well completion method is disclosed in Chinese patent No. ZL201910009289.6 with the patent name of 'a gas well pressurized well completion process method', the method reduces the construction risk of a pressurized well completion pipe string, avoids the damage of working fluid to a reservoir and prolongs the production period of a gas well, but the method belongs to the field of underbalance in the whole process and gas drilling and well completion and does not relate to oil well production.
In chinese patent No. ZL201811293653.8 entitled "packer, setting tool and drilling and completion integrated method", a completion method is disclosed, in which a packer is pre-installed on a casing and is opened by a setting tool installed on a drill pipe when necessary, but this method is not performed in a pressurized environment; and therefore, the reservoir cannot be effectively protected, and well completion operations may result in severe reservoir contamination.
The applicant has found that the prior art has at least the following technical problems:
1. in the prior art, the conventional well completion operation can cause serious reservoir pollution, the yield is reduced after the well completion operation, and the stable yield of an oil-gas well is influenced;
2. the prior art lacks a downhole completion method suitable for a downhole tool for operation under pressure for oil well production;
3. the prior art lacks a downhole completion method for operating a downhole tool with pressure.
Disclosure of Invention
The invention aims to provide a tool suitable for gas and liquid drilling downhole under-pressure well completion, which comprises an upper drill rod combination, a stratum packer tool combination, a production zone tool combination and an oil pipe combination; wherein the content of the first and second substances,
the upper drill rod assembly consists of a drill rod and a drill rod releasing upper joint arranged at the lower end of the drill rod;
the stratum packer tool combination consists of a lost-hand lower joint, a drill rod suspension packer and a production zone packer which are sequentially arranged from top to bottom;
the layer production tool combination consists of a bypass valve, a check valve and a drill bit which are arranged from top to bottom in sequence;
the oil pipe assembly consists of an oil pipe, a centralizer and a guide shoe releasing upper joint which are sequentially arranged from top to bottom;
when the drilling is normally carried out, the upper drill rod combination, the stratum packer tool combination and the production layer tool combination are sequentially connected from top to bottom to form a drilling pipe column for drilling operation;
when the production is carried out, the oil pipe combination, the stratum packer tool combination and the production layer tool combination are sequentially connected from top to bottom to form a well completion pipe column for production operation.
Furthermore, when the drill rod is normally drilled, the upper joint of the drill rod release and the lower joint of the release are combined and connected with the whole drilling pipe column, and the upper joint of the drill rod release and the lower joint of the release are circumferentially connected through a spline.
Further, when production is carried out, the guide shoe releasing upper joint and the releasing lower joint are combined to connect the whole completion pipe string.
The invention provides a method suitable for gas and liquid drilling downhole under-pressure well completion, which is carried out by applying the tool suitable for gas and liquid drilling downhole under-pressure well completion and specifically comprises the following steps:
s1, dividing the stratum into a plurality of casing sections and an open-hole production section which can be divided into a plurality of sub-layers by a packer according to the requirement of the well completion process;
s2, normally drilling to a target production layer, and in the normal drilling process, sequentially connecting an upper drill rod combination, a stratum packer tool combination and a production layer tool combination from top to bottom to form a drilling pipe column; during drilling, drilling media flow downwards through the check valve through the hollow pipe column, enter the annular space from the drill bit and flow upwards along the annular space to return to the wellhead device;
s3, when entering a well completion process, positioning a drill stem suspension packer to the top end of an open hole production zone, setting and packing the production zone, wherein the packing position is selected according to the underground working condition, and the packer generally has two packing positions, namely packing in the open hole section (without a casing) of the production zone and packing in the casing section; at the moment, a bypass flow channel in the bypass valve is closed, so that oil and gas products in the open hole production interval are prevented from entering the hollow of the tubular column;
s4, after setting is finished, lifting the whole upper drill rod assembly to separate the upper drill rod assembly from the stratum packer tool assembly and withdraw from the shaft;
s5, putting the oil pipe combination into the well;
s6, centering the upper joint of the guide shoe releasing tool by using a centralizer on the oil pipe assembly and connecting the upper joint with the lower joint of the releasing tool;
s7, if the drilling medium is liquid, a pressure bearing ball is thrown in, and the upper wellhead device presses the hollow cavity to open a bypass flow passage in the bypass valve;
if the drilling medium is not liquid, a pressure bearing ball is put in, liquid is hoisted and filled into the hollow part of the pipe column, and the upper wellhead device pressurizes the hollow part to open a bypass flow passage in the bypass valve;
s8, if the bypass flow channel is successfully opened, oil and gas products in the open hole production interval can enter the hollow of the tubular column through the bypass flow channel to perform production operation;
and if the bypass flow passage is not opened, perforating by using a hollow perforating gun in the oil pipe assembly to open a standby flow passage, and allowing the oil and gas products in the open hole production interval to enter the hollow of the tubular column through the bypass flow passage to perform production operation.
Further, in step S2, the drill pipe releasing upper joint and the releasing lower joint are circumferentially connected by a spline.
Further, in step S4, the upper drilling tool assembly is disengaged by a lower releasing joint and an upper releasing joint which are installed above the drill pipe suspension packer.
Furthermore, if the lower joint of the lost hand fails to be separated from the upper joint of the drill rod releasing hand, the explosion release buckle is selected to be separated.
Further, in step S6, isolating the production zone pressure in the open-hole production zone away from the wellhead by the drill pipe hanging packer during the tie-back tubing assembly, and setting the drill pipe hanging packer.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
(1) the tool suitable for the downhole pressurized well completion of gas and liquid drilling provided by the invention achieves the purpose of drilling tool separation through the releasing safety joint at the upper part of the packer; the purpose of packing a producing zone is realized by utilizing a drill rod to suspend a packer; the packer is introduced in the drilling process, and after the drilling process is finished, the lower production zone is firstly sealed, so that accidents such as blowout and the like caused by the fact that the lower pressure is greater than the upper pressure due to factors such as oil and gas products in the well and the like can be avoided, and then the next step of work is carried out, so that pressurized well completion is realized; the drilling and completion integration is realized, the drilling and completion cost is reduced, and the development benefit of oil and gas resources is improved;
(2) according to the method for completing the well under pressure in the gas and liquid drilling well, in the well completion process of the drill pipe pulling and oil pipe lowering, the pressure of a production zone is too high, the pressure of the production zone can be sealed and isolated by using the check valve and the bypass valve in the packer and the drilling tool at the lower part, the potential safety hazard of a well mouth is reduced, the safety of well mouth workers under the working conditions of underbalanced drilling and well completion and the like is ensured, and the risk of well completion operation is reduced;
(3) the method for the downhole pressurized well completion of the gas and liquid well drilling can reduce the high-pressure risk brought by oil and gas products during production operation; the high pressure brought by oil and gas products is isolated in a production layer by utilizing a drill rod hanging packer far away from a well mouth, the oil and gas products cannot enter an upper annular space, the oil and gas products can only be collected through the hollow of a pipe column, and well blowout accidents are further treated by matching with well mouth devices such as a blowout preventer and the like;
(4) the tool and the method suitable for gas and liquid well drilling downhole under-pressure well completion are wide in application range, can be applied to gas under-pressure well drilling and completion and liquid under-balance well drilling and completion; the drilling and completion method is suitable for drilling and completing various well tracks, such as a vertical well, an inclined well and a horizontal well; can be simultaneously suitable for the packer of the production layer in the casing and the packer of the barefoot production layer.
Drawings
FIG. 1 is a schematic representation of a drilling operation completion string of the present invention;
FIG. 2 is a schematic view of an open hole setting pipe trip condition completion string of the present invention;
FIG. 3 is a schematic view of a casing setting pipe trip condition completion string of the present invention;
FIG. 4 is a schematic of the tubing run condition completion string of the present invention;
FIG. 5 is a flow chart of the operation of the completion method of the present invention;
FIG. 6 is a schematic diagram of a horizontal well application of the completion string and completion method of the present invention;
fig. 7 is a cross-sectional view of the safety sub a-a of the present invention.
In the figure: 1. combining an upper drill rod; 11. releasing the upper joint of the drill rod; 12. a drill stem; 2. a formation packer tool combination; 21. the lower joint of the hand is lost; 22. a drill rod suspension packer; 23. a producing zone packer; 3. a layer production tool combination; 31. a bypass valve; 32. a check valve; 33. a drill bit; 34. a pressure bearing ball; 4. combining oil pipes; 41. an oil pipe; 42. a centralizer; 43. the upper joint of the guide shoe releasing device; 44. a hollow perforating gun; 5. a plurality of layers of casing sections; 6. an open-hole productive interval; 7. a wellhead assembly.
Detailed Description
As shown in fig. 1-7:
example 1:
a tool suitable for gas and liquid well drilling downhole pressurized well completion comprises an upper drill rod combination 1, a stratum packer tool combination 2, a producing zone tool combination 3 and an oil pipe combination 4; wherein the content of the first and second substances,
the upper drill rod assembly 1 consists of a drill rod 12 and a drill rod releasing upper joint 11 arranged at the lower end of the drill rod 12;
the stratum packer tool combination 2 consists of a lost-hand lower joint 21, a drill stem hanging packer 22 and a producing zone packer 23 which are sequentially arranged from top to bottom;
the production zone tool combination 3 consists of a bypass valve 31, a check valve 32 and a drill bit 33 which are arranged from top to bottom in sequence;
the oil pipe assembly 4 consists of an oil pipe, a centralizer 42 and a guide shoe releasing upper joint 43 which are arranged from top to bottom in sequence;
when the drilling is normally carried out, the upper drill rod combination 1, the stratum packer tool combination 2 and the stratum production tool combination 3 are sequentially connected from top to bottom to form a drilling pipe column for drilling operation; when normally drilling, the drill rod releasing upper joint 11 and the releasing lower joint 21 are combined and connected with the whole drilling pipe column, circumferential connection is carried out between the drill rod releasing upper joint 11 and the releasing lower joint 21 through splines to transmit large torque, as shown in fig. 7, circumferential connection is carried out between the drill rod releasing upper joint 1111 and the releasing lower joint 2121 through splines, namely, the upper drill rod combination 11 is connected with the formation packer tool combination 22, the corresponding working condition is a drilling working condition, and large torque needs to be transmitted at the moment.
When in production, the oil pipe combination 4, the stratum packer tool combination 2 and the production layer tool combination 3 are sequentially connected from top to bottom to form a well completion pipe column for production operation; when production is taking place, the guide shoe lower sub 43 in combination with the lower sub 21 connects the entire completion string.
Example 2:
the tool suitable for gas and liquid well drilling downhole under-pressure completion in the embodiment 1 is used for well drilling and completion operation:
s1, dividing the stratum into a plurality of casing sections 5 and an open-hole production section 6 which can be divided into a plurality of sub-layers by a packer according to the requirement of the well completion process;
s2, normally drilling to a target production layer, and in the normal drilling process, sequentially connecting the upper drill rod combination 1, the stratum packer tool combination 2 and the production layer tool combination 3 from top to bottom to form a drilling pipe column; specifically, the upper joint 11 of the drill rod release and the lower joint 21 of the release are circumferentially connected through splines; transmitting torque during normal drilling; while drilling, the drilling medium travels down through the tubing string hollow, through the check valve 32, from the drill bit 33 into the annulus, up the annulus back to the wellhead 7;
s3, entering a well completion procedure, and when in production, sequentially connecting the oil pipe combination 4, the formation packer tool combination 2 and the production zone tool combination 3 from top to bottom to form a well completion string for production operation; when production is taking place, the guide shoe lower sub 43 in combination with the lower sub 21 connects the entire completion string. Positioning a drill rod hanging packer 22 to the top end of an open hole production interval 6, setting and packing the production interval, wherein two packing positions are generally selected for the packer according to the underground working condition at the packing position, wherein the packing is carried out at the open hole section of the production interval without a sleeve, and the packing is carried out at the sleeve section; at the moment, a bypass flow channel in the bypass valve 31 is closed, so that oil and gas products in the open-hole production interval 6 are prevented from entering the hollow pipe column;
s4, after setting is completed, lifting the whole upper drill rod assembly 1, and if the lower lost-motion joint 21 and the upper drill rod releasing joint 11 which are arranged above the drill rod hanging packer 22 are failed to separate the upper drilling tool assembly, selecting explosion release to separate the upper drilling tool assembly, namely separating the upper drilling tool assembly from the stratum packer tool assembly 2 and withdrawing from a shaft;
s5, lowering the oil pipe assembly 4 into the well;
s6, setting the drill stem hanging packer 22, isolating the pressure of the production zone in an open hole production zone 6 far away from the wellhead when the drill stem hanging packer 22 returns the oil pipe assembly 4, wherein oil and gas products in the open hole production zone 6 cannot enter the tubular column annulus of the multi-layer casing section 5; a check valve 32 mounted on the upper part of the drill bit 33 prevents the oil and gas products from entering the hollow of the pipe string through the drill bit 33; then centering the guide shoe releasing upper joint 43 by using the centralizer 42 on the oil pipe assembly 4 and connecting the guide shoe releasing upper joint with the lost hand lower joint 21;
s7, putting the pressure bearing ball 34 with the drilling medium as liquid, and pressing the upper wellhead device 7 to the hollow state to open the bypass flow passage in the bypass valve 31; s8, if the bypass flow channel is successfully opened, oil and gas products in the open-hole production interval 6 can enter the hollow of the tubular column through the bypass flow channel to perform production operation; if the bypass flow passage is not opened, a hollow perforating gun 44 in the oil pipe assembly 4 is used for perforating and opening up a standby flow passage, and oil and gas products in the open-hole production interval 6 enter the hollow of the pipe column through the bypass flow passage to carry out production operation.
Example 3:
the downhole pressurized completion tool suitable for gas and liquid drilling in the embodiment 1 is applied to the drilling and completion operation:
s1, dividing the stratum into a plurality of casing sections 5 and an open-hole production section 6 which can be divided into a plurality of sub-layers by a packer according to the requirement of the well completion process;
s2, normally drilling to a target production zone, and in the normal drilling process, sequentially connecting the upper drill rod combination 1, the stratum packer tool combination 2 and the production zone tool combination 3 from top to bottom to form a drilling pipe column; specifically, the upper joint 11 of the drill rod release and the lower joint 21 of the release are circumferentially connected through splines; transmitting torque during normal drilling; while drilling, the drilling medium travels down through the tubing string hollow, through the check valve 32, from the drill bit 33 into the annulus, up the annulus back to the wellhead 7;
s3, entering a well completion procedure, and when in production, sequentially connecting the oil pipe combination 4, the formation packer tool combination 2 and the production zone tool combination 3 from top to bottom to form a well completion string for production operation; when production is taking place, the guide shoe lower sub 43 in combination with the lower sub 21 connects the entire completion string. Positioning a drill rod hanging packer 22 to the top end of an open hole production interval 6, setting and packing the production interval, wherein two packing positions are generally selected for the packer according to the underground working condition at the packing position, wherein the packing is carried out at the open hole section of the production interval without a sleeve, and the packing is carried out at the sleeve section; at the moment, a bypass flow channel in the bypass valve 31 is closed, so that oil and gas products in the open-hole production interval 6 are prevented from entering the hollow pipe column;
s4, after setting is completed, lifting the whole upper drill rod assembly 1, and if the lower lost-motion joint 21 and the upper drill rod releasing joint 11 which are arranged above the drill rod hanging packer 22 are failed to separate the upper drilling tool assembly, selecting explosion release to separate the upper drilling tool assembly, namely separating the upper drilling tool assembly from the stratum packer tool assembly 2 and withdrawing from a shaft;
s5, lowering the oil pipe assembly 4 into the well;
s6, setting the drill stem hanging packer 22, isolating the pressure of the production zone in an open hole production zone 6 far away from the wellhead when the drill stem hanging packer 22 returns the oil pipe assembly 4, wherein oil and gas products in the open hole production zone 6 cannot enter the tubular column annulus of the multi-layer casing section 5; a check valve 32 mounted on the upper portion of the drill bit 33 prevents oil and gas products from entering the hollow of the pipe string through the drill bit 33; then centering the guide shoe releasing upper joint 43 by using the centralizer 42 on the oil pipe assembly 4 and connecting the guide shoe releasing upper joint with the lost hand lower joint 21;
s7, putting a drilling medium which is not liquid into the pressure bearing ball 34, filling liquid into the hollow of the pipe column, and pressurizing the upper wellhead device 7 to the hollow to open a bypass flow channel in the bypass valve 31;
s8, if the bypass flow channel is successfully opened, oil and gas products in the open-hole production interval 6 can enter the hollow of the tubular column through the bypass flow channel to perform production operation; if the bypass flow passage is not opened, a hollow perforating gun 44 in the oil pipe assembly 4 is used for perforating and opening up a standby flow passage, and oil and gas products in the open-hole production interval 6 enter the hollow of the pipe column through the bypass flow passage to carry out production operation.
Claims (8)
1. The tool is suitable for gas and liquid drilling downhole under-pressure well completion and is characterized by comprising an upper drill rod combination (1), a stratum packer tool combination (2), a production zone tool combination (3) and an oil pipe combination (4); wherein, the first and the second end of the pipe are connected with each other,
the upper drill rod assembly (1) consists of a drill rod (12) and a drill rod releasing upper joint (11) arranged at the lower end of the drill rod (12);
the stratum packer tool combination (2) consists of a hand-losing lower joint (21), a drill rod suspension packer (22) and a production layer packer (23) which are sequentially arranged from top to bottom;
the layer production tool combination (3) consists of a bypass valve (31), a check valve (32) and a drill bit (33) which are arranged from top to bottom in sequence;
the oil pipe combination (4) consists of an oil pipe, a centralizer (42) and a guide shoe releasing upper joint (43) which are sequentially arranged from top to bottom;
when the drilling pipe column is normally drilled, the upper drill rod combination (1), the stratum packer tool combination (2) and the production layer tool combination (3) are sequentially connected from top to bottom to form the drilling pipe column for drilling operation;
when the production is carried out, the oil pipe combination (4), the stratum packer tool combination (2) and the production layer tool combination (3) are sequentially connected from top to bottom to form a well completion pipe column for production operation.
2. A tool for gas and liquid drilling downhole completion with pressure according to claim 1, characterized in that, during normal drilling, the drill pipe releasing upper joint (11) and the releasing lower joint (21) are combined to connect the whole drilling string, and the drill pipe releasing upper joint (11) and the releasing lower joint (21) are connected circumferentially through splines.
3. A tool suitable for use in the pressurized completion of a gas and liquid well downhole according to claim 1, wherein the guide shoe lower sub (43) is coupled to the lower sub (21) to connect the entire completion string when production is underway.
4. A method for completing a gas and liquid well downhole under pressure, which is characterized by being carried out by using the tool for completing the gas and liquid well downhole under pressure as claimed in any one of claims 1-3, and comprising the following steps:
s1, dividing the stratum into a plurality of casing sections (5) and an open-hole production section (6) which can be divided into a plurality of sub-layers by a packer according to the requirement of a well completion process;
s2, normally drilling to a target production layer, and in the normal drilling process, sequentially connecting an upper drill rod combination (1), a stratum packer tool combination (2) and a production layer tool combination (3) from top to bottom to form a drilling pipe column; during drilling, the drilling medium descends through the hollow of the pipe column through a check valve (32), enters the annular space from a drill bit (33) and returns to the wellhead device (7) along the annular space;
s3, when entering a well completion process, positioning a drill stem suspension packer (22) to the top end of the open hole production interval (6), setting and packing the production interval; at the moment, a bypass flow channel in the bypass valve (31) is closed, so that oil and gas products in the open hole production interval (6) are prevented from entering the hollow of the tubular column;
s4, after setting is finished, lifting the whole upper drill rod assembly (1) to separate the upper drilling tool assembly from the formation packer tool assembly (2) and withdrawing the shaft;
s5, lowering the oil pipe assembly (4) into the well;
s6, centering the guide shoe releasing upper joint (43) by using the centralizer (42) on the oil pipe assembly (4) and connecting the guide shoe releasing upper joint with the releasing lower joint (21);
s7, if the drilling medium is liquid, putting in a pressure bearing ball (34), and pressing the upper wellhead device (7) to the hollow state to open a bypass flow channel in the bypass valve (31);
if the drilling medium is not liquid, a pressure bearing ball (34) is thrown in, liquid is filled into the hollow of the pipe column, and the upper wellhead device (7) presses the hollow to open a bypass flow channel in the bypass valve (31);
s8, if the bypass flow channel is successfully opened, oil and gas products in the open hole production interval (6) can enter the hollow of the tubular column through the bypass flow channel to perform production operation;
if the bypass flow passage is not opened, a spare flow passage is opened by perforating with a hollow perforating gun (44) in the oil pipe assembly (4), and oil and gas products in the open hole production section (6) enter the hollow of the pipe column through the bypass flow passage to carry out production operation.
5. The method for gas and liquid drilling downhole under pressure completion according to claim 4, wherein in step S2, the drill pipe release upper joint (11) and the release lower joint (21) are connected circumferentially by splines.
6. The method for downhole pressurized completion of gas and liquid drilling according to claim 4, wherein in step S4, the disengagement of the upper drilling tool assembly is achieved by a lower drop sub (21) and an upper drop sub (11) mounted above a drill pipe suspension packer (22).
7. A method for completion of a gas and liquid well under pressure downhole according to claim 6, characterised in that if the release lower sub (21) fails to disengage from the release upper sub (11) of the drill pipe, an explosive release is selected for disengagement.
8. The method for downhole pressurized completion of a gas and liquid well according to claim 4, wherein in step S6, the pipe hanger packer (22) isolates the production zone pressure to an open-hole production zone (6) away from the wellhead when the tubing assembly (4) is retrieved, and further comprising setting the pipe hanger packer (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210636393.XA CN115045635A (en) | 2022-06-07 | 2022-06-07 | Tool and method suitable for downhole pressurized well completion of gas and liquid drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210636393.XA CN115045635A (en) | 2022-06-07 | 2022-06-07 | Tool and method suitable for downhole pressurized well completion of gas and liquid drilling |
Publications (1)
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Application publication date: 20220913 |