A hole expansion device while drilling and its use method

Abstract

The present invention proposes a drilling reaming device and a method for using the same, wherein the end of an upper limit positioning body abuts against an elastic member mounting seat, the upper limit positioning body can move along a main body and can be fixed at a preset position of the main body, so that a first preset distance exists between the elastic member mounting seat and the cutter body; the elastic member is placed between the elastic member mounting seat and the cutter body; the main body is provided with a plurality of inclined grooves along the axial direction, and the angle between the inclined grooves and the main body axis is an acute angle; the cutter body is provided with a plurality of blades corresponding to the inclined grooves one by one, the blade wings are provided with protrusions matching the inclined grooves, and the protrusions are embedded in the inclined grooves; a hydraulic drive component is at least partially embedded in a sliding component, and an annulus is formed between the sliding component and the sliding component, and the hydraulic drive component is provided with a first drive fluid channel leading to the annulus; in a first state, the first drive fluid channel is opened, and the sliding component pushes the cutter body and the elastic member to move under the action of the drive fluid pressure, and causes the blades to move along the inclined grooves and expand radially until the cutter body contacts the elastic member mounting seat.

Description

Technical Field

[0001] The invention relates to the technical field of expansion pipes, and in particular to a hole-reaming-while-drilling device and a use method thereof. Background Art

[0002] In oil and gas well drilling, as the drilling depth increases, concentric casing is installed in the borehole and cemented. Each new layer of casing needs to be supported in the upper casing, resulting in a gradual decrease in the annular area of ​​the cementing operation and the flow area for the produced oil and gas. Therefore, it is necessary to increase the annular space of the cementing operation and increase the liquid production area. Usually, it is necessary to expand the wellbore below the end of the lower casing to obtain a larger annular area to install more casing, reach deeper formations, and provide more flow area for oil and gas production.

[0003] In the prior art, a reamer is generally used to penetrate the borehole of the lower casing and expand the borehole at the lower end of the lower casing. The reamer basically has two working states: one is a closed state, which allows the tool to pass through the existing casing wellbore; the other is an open state, with the tool extending from the body at the end. In this state, the diameter of the borehole can be expanded when the reamer rotates and descends in the borehole. Summary of the invention

[0004] In the prior art, traditional reamers have several disadvantages: the cutting structure is usually composed of a drill bit part, which cannot reliably expand the borehole to the required diameter; adjusting the expanded diameter of the reamer requires replacing the reamer tool, or even replacing reamers of different diameters; many reamers are designed to automatically expand when drilling fluid is pumped into the drill string. In the presence of hydraulic pressure in the drill string, the reamers always remain in a fully expanded state, which is not conducive to adjusting the reaming diameter and recovering the reamers. In view of the above problems, it is necessary to propose a drilling reaming device and a method of using the same to solve or partially solve the above problems. The technical solutions proposed in the present invention are as follows:

[0005] In a first aspect, the present invention provides a hole expansion device while drilling, comprising a body, and an upper limit body, a center pipe, an elastic member mounting seat, an elastic member, a cutter body, a sliding member and a hydraulic drive assembly located inside the body, wherein:

[0006] The upper limit body, the elastic member mounting seat, the elastic member, the cutter body, the sliding member and the hydraulic drive assembly are sequentially sleeved on the central tube;

[0007] The end of the upper limit positioning body abuts against the elastic member mounting seat, and the upper limit positioning body can move along the body and can be fixed at a preset position of the body, so that there is a first preset distance between the elastic member mounting seat and the knife body;

[0008] The elastic member is placed between the elastic member mounting seat and the cutter body;

[0009] The body is provided with a plurality of inclined grooves along the axial direction, and the angle between the inclined grooves and the axis of the body is an acute angle;

[0010] The blade body is provided with a plurality of blade wings corresponding to the inclined grooves one by one, and the blade wings are provided with protrusions matching the inclined grooves, and the protrusions are embedded in the inclined grooves;

[0011] The hydraulic drive assembly is at least partially embedded in the sliding member and forms an annulus portion between the hydraulic drive assembly and the sliding member, and the hydraulic drive assembly is provided with a first drive fluid channel leading to the annulus portion;

[0012] The drilling reaming device includes at least the following two states:

[0013] In the first state, the first driving fluid channel is opened, and the sliding member pushes the blade body and the elastic member to move under the action of the driving fluid pressure, and causes the blade wing to move along the inclined groove and expand radially until the blade body contacts the elastic member mounting seat;

[0014] In the second state, the first driving fluid channel is closed, and the blade is retracted under the elastic force of the elastic member.

[0015] In one embodiment, the hydraulic drive assembly includes a lower limiter connected to the body;

[0016] The lower limit body is partially embedded in the sliding member and forms the annular space between the lower limit body and the sliding member; the first driving liquid channel is arranged in the lower limit body.

[0017] In one embodiment, the hydraulic drive assembly further comprises an opening sleeve, a sleeve cover, a closing sleeve and an auxiliary sleeve;

[0018] The opening sliding sleeve and the closing sliding sleeve are sequentially embedded in the lower limit body, and the closing sliding sleeve is arranged close to one side of the knife body;

[0019] The sliding sleeve cover is sleeved on the opening sliding sleeve, and annular protrusions are axially arranged at both ends of the sliding sleeve, and the annular protrusions are sleeved on the lower limit body and connected to the lower limit body;

[0020] The opening sleeve is provided with a first shaft shoulder, the opening sleeve is embedded in the lower limit body and connected to the lower limit body, so that there is a second preset distance between the first shaft shoulder and the sleeve cover, and the opening sleeve blocks the first driving liquid channel;

[0021] The closing sleeve is connected to the lower limiter, and the closing sleeve is provided with a first shaft shoulder;

[0022] The auxiliary sliding sleeve is embedded in the closing sliding sleeve and connected to the closing sliding sleeve.

[0023] In one embodiment, the hydraulic drive assembly further comprises an opening ball;

[0024] A first through hole is provided at the bottom of the opening sleeve. When the opening sphere closes the first through hole, under the action of the driving liquid pressure, the opening sleeve is disconnected from the lower limit body, and the opening sleeve moves toward the sleeve cover until the first shaft shoulder abuts against the sleeve cover, so that the first driving liquid channel is opened and the drilling reaming device enters the first state.

[0025] In one embodiment, the hydraulic drive assembly further comprises a closing ball;

[0026] The auxiliary sleeve is provided with a second through hole. When the closing ball closes the second through hole, under the action of the driving liquid pressure, the closing sleeve is disconnected from the lower limit body, and the closing sleeve and the auxiliary sleeve move toward the opening sleeve as a whole until the closing sleeve abuts against the opening sleeve. The closing sleeve blocks the first driving liquid channel, so that the first driving liquid channel is closed, and the drilling reaming device enters the second state.

[0027] In one embodiment, the opening sleeve is provided with a second driving fluid channel;

[0028] In the second state, the auxiliary sleeve is disconnected from the closing sleeve, and the auxiliary sleeve and the closing ball move to the bottom of the opening sleeve, so that the driving fluid is discharged from the second driving fluid channel.

[0029] In one embodiment, the hydraulic drive assembly further comprises a forced recovery seat and a forced recovery ball;

[0030] The forced recovery seat is sleeved on the central tube and abuts against the elastic member mounting seat;

[0031] The upper limit position body is disposed outside the forced recovery seat and is connected to the forced recovery seat;

[0032] The forced recovery ball is used to close the forced recovery seat; the drilling reaming device also includes a third state:

[0033] In the third state, the forced recovery ball closes the forced recovery seat, the forced recovery seat is disconnected from the upper limit body, and the forced recovery seat pushes the elastic member mounting seat to move, thereby driving the blade to move along the inclined groove and contract radially.

[0034] In one embodiment, the forced recovery seat is provided with a third drive liquid channel, so that the drive liquid is discharged from the central tube through the third drive liquid channel.

[0035] In one embodiment, it further includes an elastic member support plate outermostly disposed on the central tube;

[0036] The elastic member support plate is located between the elastic member and the knife body.

[0037] In one embodiment, the drilling reaming device further includes a limit block sleeved on the elastic member mounting seat;

[0038] In the first state, the limit block abuts against the elastic member support plate to guide the movement of the elastic member support plate.

[0039] In one embodiment, a limiting protrusion is provided at one end of the upper limit body close to the elastic member mounting seat, and the forced recovery seat is provided with a second shaft shoulder;

[0040] In the third state, the forced recovery seat pushes the elastic member mounting seat to move until the second shaft shoulder abuts against the limiting protrusion.

[0041] In one embodiment, a first thread is provided at a position where the forced recovery ball seat and the central tube are nested, and the forced recovery ball seat and the central tube are connected via the first thread.

[0042] In one embodiment, the sliding member is provided with an annular groove, and the body is provided with a cooling water channel at a position corresponding to the annular groove, so that the driving fluid enters the cooling water channel through the annular groove and is sprayed toward the blade.

[0043] In one embodiment, a fourth drive fluid channel 1605 is provided at one end of the sliding member close to the open sleeve, so that the drive fluid enters the annular groove from the annular space.

[0044] In one embodiment, the drilling reaming device further includes a cutter body support plate, and a third shoulder is provided at one end of the sliding member close to the elastic member mounting seat;

[0045] The tool body supporting plate is externally mounted on the sliding member and abuts against the third shaft shoulder.

[0046] In one embodiment, the reaming while drilling device further includes a clamping block;

[0047] The clamping block is connected to the knife body supporting plate.

[0048] In a second aspect, the present invention provides a method for using a drilling-while-reaming device, which is used for the drilling-while-reaming device, comprising:

[0049] An opening ball is inserted from one end of the main body close to the upper limit body, so that the first driving liquid channel is opened, and the blade moves along the inclined groove and expands radially to perform the hole expansion operation;

[0050] A closing ball is inserted from one end of the main body close to the upper limit body, so that the first drive fluid channel is closed, the blade is retracted, and drilling continues or drilling is started at full displacement.

[0051] In one embodiment, the method for using the drilling-while-reaming device further includes:

[0052] A forced recovery ball is thrown in from one end of the main body close to the upper limit body, so that the forced recovery seat pushes the elastic component mounting seat to move, thereby pushing the blade to move along the inclined groove and contract radially.

[0053] Based on the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows:

[0054] The drilling reaming device disclosed in the present invention has an end portion of an upper limit body abutting against an elastic member mounting seat, and the upper limit body can move along the main body and can be fixed at a preset position of the main body, so that a first preset distance is provided between the elastic member mounting seat and the cutter body. By adjusting the first preset distance, the maximum outer diameter of the radial expansion of the blade can be controlled, so that the blade can be accurately adjusted to a required diameter, and the wellbore expansion rate is accurate and reliable. Moreover, if the reaming diameter needs to be adjusted during the reaming operation, there is no need to replace the cutter, and the first preset distance can be adjusted by adjusting the position of the upper limit body in the main body. The reaming diameter adjustment structure is simple, easy to implement, and highly safe.

[0055] The reaming while drilling device disclosed in the present invention, after completing the reaming task, puts the reaming while drilling device in the second state and completes the retraction of the blades. Compared with the reaming tools in the prior art, the blades do not need to always maintain a fully expanded state, which is beneficial to the adjustment of the reaming diameter and the recovery of the reaming while drilling device. The blades can be opened and retracted underground, and drilling can be continued or the drill can be pulled out at full displacement after completing the reaming task.

[0056] The drilling reaming device disclosed in the present invention arranges a plurality of inclined grooves along the axial direction on the body so that the blades can be expanded with the inclined grooves as expansion tracks. Due to the drilling pressure and the self-locking characteristics of the inclined grooves, the blades can be reliably maintained in a fully open position, thereby improving the diameter protection capability.

[0057] The drilling expansion device disclosed in the present invention is a device in which an upper limit positioning body, an elastic member mounting seat, an elastic member, a cutter body, a sliding member and a hydraulic drive assembly are sequentially sleeved on a central tube; and the upper limit positioning body, the central tube, the elastic member mounting seat, the elastic member, the cutter body, the sliding member and the hydraulic drive assembly are all arranged inside the main body, so that the overall structure is compact, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic diagram of the structure of a hole expansion while drilling device provided by an embodiment of the present invention;

[0059] Figure 2 for Figure 1 A partial view of part I of the drilling reaming device shown;

[0060] Figure 3 for Figure 1 A partial view of part II of the drilling reaming device shown;

[0061] Figure 4 A schematic structural diagram of a body of a hole-reaming-while-drilling device provided in an embodiment of the present invention;

[0062] Figure 5 for Figure 4 The schematic diagram of the structure of part III of the main body shown;

[0063] Figure 6 A schematic structural diagram of an upper limit position body of a hole expansion while drilling device provided by an embodiment of the present invention;

[0064] Figure 7 A schematic structural diagram of a forced recovery ball seat of a hole expansion device while drilling provided by an embodiment of the present invention;

[0065] Figure 8 A schematic structural diagram of a piston of a drilling-while-reaming device provided in an embodiment of the present invention;

[0066] Fig. 9 A schematic structural diagram of a lower stopper of a hole expansion while drilling device provided by an embodiment of the present invention;

[0067] Fig.10 A schematic structural diagram of an open sleeve of a hole expansion while drilling device provided in an embodiment of the present invention.

[0068] In the figure:

[0069] 1 is the body, 101 is the inclined groove, 102 is the cooling water channel, 2 is the fourth pin, 3 is the upper limit body, 4 is the forced recovery seat, 5 is the center tube, 6 is the elastic member mounting seat, 7 is the first sealing ring, 8 is the second sealing ring, 9 is the elastic member, 10 is the limit block, 11 is the elastic member support plate, 12 is the knife body, 121 is the knife wing, 13 is the knife body support plate, 14 is the block, 15 is the bolt, 16 is the sliding member, 17 is the lower limit body, 18 is the closing sleeve, 19 is the first pin, 20 is the second pin, 21 is the auxiliary sleeve, 22 is the third pin, 23 is the first sealing ring, 24 is the second sealing ring, 25 is the third sealing ring, 26 is the fourth sealing ring, 27 is the fifth sealing ring, 28 is the sixth sealing ring, 29 is the sleeve cover, 2901 is the annular protrusion, 30 is the opening sleeve, 31 is the opening sleeve Open sphere, 32 is closed sphere, 33 is forced recovery sphere, 301 is the first pin hole, 302 is the second thread, 303 is the limiting protrusion, 401 is the second pin hole, 402 is the third driving liquid channel, 403 is the second shoulder, 404 is the first thread, 1601 is the third shoulder, 1602 is the first sealing groove, 1603 is the second sealing groove, 1604 is the annular groove, 1605 is the fourth driving liquid channel, (lower limiting body) 1701 is the third sealing groove, 1702 is the third pin hole, 1703 is the fourth pin hole, 1704 is the shoulder, 1705 is the third thread, 1706 is the first driving liquid channel, 3001 is the fourth sealing groove, 3002 is the fifth pin hole, 3003 is the first shoulder, 3004 is the second driving liquid channel, 3005 is the first through hole. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0071] Embodiment 1

[0072] The embodiment of the present invention provides a hole expansion device while drilling, referring to Figure 1-Figure 10 As shown, it includes a body 1, and an upper limit body 3, a center tube 5, an elastic member mounting seat 6, an elastic member 9, a cutter body 12, a sliding member 16 and a hydraulic drive assembly located inside the body 1, wherein:

[0073] The upper limit body 3, the elastic member mounting seat 6, the elastic member 9, the cutter body 12, the sliding member 16 and the hydraulic drive assembly are sequentially sleeved on the central tube 5;

[0074] The end of the upper limit positioning body 3 abuts against the elastic member mounting seat 6, and the upper limit positioning body 3 can move along the body 1 and can be fixed at a preset position of the body 1, so that there is a first preset distance between the elastic member mounting seat 6 and the blade body 12;

[0075] The elastic member 9 is placed between the elastic member mounting seat 6 and the blade body 12;

[0076] The body 1 is provided with a plurality of inclined grooves 101 along the axial direction, and the angle between the inclined grooves 101 and the axis of the body 1 is an acute angle;

[0077] The blade body 12 is provided with a plurality of blade wings 121 corresponding to the inclined slots 101 one by one, and the blade wings 121 are provided with protrusions matching the inclined slots 101, and the protrusions are embedded in the inclined slots 101;

[0078] The hydraulic drive assembly is at least partially embedded in the sliding member 16, and an annulus is formed between the hydraulic drive assembly and the sliding member 16. The hydraulic drive assembly is provided with a first drive fluid channel 1706 leading to the annulus;

[0079] The drilling reaming device includes at least the following two states:

[0080] In the first state, the first driving fluid channel 1706 is opened, and the sliding member 16 pushes the blade body 12 and the elastic member 9 to move under the action of the driving fluid pressure, and makes the blade wing 121 move along the inclined groove 101 and expand radially until the blade body 12 contacts the elastic member mounting seat 6. At this time, the blade wing 121 expands to the maximum diameter. In this state, the reaming operation can be performed.

[0081] In the second state, the first driving fluid channel 1706 is closed, and the blade 121 is retracted under the elastic force of the elastic member 9. In this state, drilling can continue or the well can be pulled out at full displacement.

[0082] In this embodiment, the upper limit positioning body 3 and the main body 1 can be connected by a threaded connection, and the upper limit positioning body 3 can be moved along the main body 1 through the threaded connection, and the upper limit positioning body 3 can be fixed at the preset position of the main body 1. By adjusting the depth of the upper limit positioning body 3 screwed into the main body 1, the first preset distance between the elastic member mounting seat 6 and the blade body 12 can be adjusted. Of course, the upper limit positioning body 3 and the main body 1 can also be other connection structures, as long as the upper limit positioning body 3 can be moved along the main body 1 and can be fixed at the preset position of the main body 1, and the purpose of adjusting the first preset distance between the elastic member mounting seat 6 and the blade body 12 can be achieved.

[0083] In the drilling reaming device disclosed in the present invention, the end of the upper limit positioning body 3 abuts against the elastic member mounting seat 6, and the upper limit positioning body 3 can move along the main body 1 and can be fixed at a preset position of the main body 1, so that there is a first preset distance between the elastic member mounting seat 6 and the cutter body 12, and the maximum outer diameter of the radial expansion of the blade wing 121 can be controlled by adjusting the first preset distance, so that the blade wing 121 can be accurately adjusted to the required diameter; and if the reaming diameter needs to be adjusted during the reaming operation, there is no need to replace the tool, and the first preset distance can be adjusted by adjusting the position of the upper limit positioning body 3 in the main body 1. The reaming diameter adjustment structure is simple, easy to implement, and has high safety.

[0084] The reaming while drilling device disclosed in the present invention, after completing the reaming task, puts the reaming while drilling device in the second state and completes the retraction of the blade 121. Compared with the reaming tools in the prior art, the blade 121 does not need to always maintain a fully expanded state, which is conducive to the adjustment of the reaming diameter and the recovery of the reaming while drilling device.

[0085] The drilling reaming device disclosed in the present invention, by arranging a plurality of inclined grooves 101 along the axial direction on the main body 1, enables the blade 121 to expand with the inclined grooves 101 as the expansion track. Due to the drilling pressure and the self-locking characteristics of the inclined grooves 101, it is ensured that the blade 121 can be reliably maintained in the fully open position, thereby improving the diameter protection capability.

[0086] The drilling reaming device disclosed in the present invention is achieved by sequentially sleeveing ​​an upper limit positioning body 3, an elastic member mounting seat 6, an elastic member 9, a cutter body 12, a sliding member 16 and a hydraulic drive assembly on a central tube 5; and the upper limit positioning body 3, the central tube 5, the elastic member mounting seat 6, the elastic member 9, the cutter body 12, the sliding member 16 and the hydraulic drive assembly are all placed inside a main body 1, and the overall structure is compact, safe and reliable.

[0087] In some embodiments, reference Figure 2 As shown, a first sealing ring 7 is provided between the elastic member mounting seat 6 and the main body 1, and a second sealing ring 8 is provided between the elastic member mounting seat 6 and the central tube 5. The first sealing ring and the second sealing ring are used to achieve sealing between the elastic member mounting member and the main body 1 and the central tube 5, thereby ensuring that when the elastic member mounting seat 6 moves in the main body 1, no leakage of the driving fluid is caused.

[0088] In some embodiments, reference Fig. 9As shown, the hydraulic drive assembly includes a lower limiter 17 connected to the body 1, the lower limiter 17 is partially embedded in the sliding member 16, the annulus is formed between the lower limiter 17 and the sliding member 16, and the first driving liquid channel 1706 is provided on the lower limiter 17. Specifically, the driving liquid enters the annulus from the first driving liquid channel 1706, and under the action of the driving liquid pressure, the sliding member 16 pushes the blade body 12 and the elastic member 9 to move, so that the blade wing 121 moves along the inclined groove 101 and expands radially until the blade body 12 contacts the elastic member mounting seat 6, at which time the blade wing 121 expands to the maximum diameter.

[0089] In one embodiment, referring to Fig. 9 As shown, the lower limiting body 17 is provided with a shoulder 1704, and one end face of the shoulder 1704 abuts against the sliding member 16 to limit the sliding member 16. In the second state or the third state, the knife body pushes the sliding member 16 to move in a direction away from the elastic member until the sliding member 16 abuts against the shoulder 1704.

[0090] In a further embodiment, referring to Fig. 9 As shown, a third thread 1705 is provided on the shoulder 1704, and the lower limit body 17 is connected to the main body through the third thread 1705. The depth of the third thread 1705 screwed into the main body 1 can adjust the distance between the shoulder 1704 and the sliding member 16, thereby adjusting the maximum limit of the movement of the sliding member 16.

[0091] In some embodiments, reference Figure 3 As shown, the hydraulic drive assembly also includes an opening sleeve 30, a sleeve cover 29, a closing sleeve 18 and an auxiliary sleeve 21. The opening sleeve 30 and the closing sleeve 18 are sequentially embedded in the lower limit body 17, and the closing sleeve 18 is arranged close to the side of the cutter body 12; the sleeve cover 29 is sleeved on the opening sleeve 30, and an annular protrusion 2901 is axially arranged at both ends of the sleeve, and the annular protrusion 2901 is sleeved on the lower limit body 17 and is connected to the lower limit body 1 7; the opening sleeve 30 is provided with a first shoulder 3003, the opening sleeve 30 is embedded in the lower limit body 17 and connected to the lower limit body 17, so that there is a second preset distance between the first shoulder 3003 and the sleeve cover 29, and the opening sleeve 30 blocks the first driving liquid channel 1706; the closing sleeve 18 is connected to the lower limit body 17; the auxiliary sleeve 21 is embedded in the closing sleeve 18 and connected to the closing sleeve 18.

[0092] In one embodiment, referring to Figure 3 and Fig. 9As shown, the lower limit body 17 is provided with a third pin hole 1702, and the corresponding position of the closing sleeve 18 is also provided with a pin hole, and the first pin 19 passes through the pin hole of the closing sleeve 18 and the third pin hole 1702 to connect the closing sleeve 18 with the lower limit body 17; the auxiliary sleeve 21 is connected to the closing sleeve 18 through the second pin 20, referring to Figure 3 , Fig. 9 and Fig.10 As shown, the opening sleeve 30 is provided with a fifth pin hole 3002, the lower limit body 17 is provided with a fourth pin hole 1703, the third pin 22 passes through the fifth pin hole 3002 and the fourth pin hole 1703, so as to connect the opening sleeve 30 with the lower limit body 17, and the sleeve cover 29 is connected with the lower limit body 17 through threads.

[0093] In a specific embodiment, referring to Figure 3 As shown, a first sealing ring 23 is provided between the lower limit body 17 and the opening sleeve 30. For details, refer to Fig.10 As shown, the opening sleeve 30 is provided with a fourth sealing groove 3001 , and the first sealing ring 23 is provided in the fourth sealing groove 3001 .

[0094] In a specific embodiment, referring to Figure 3 As shown, a second sealing ring 24 and a fourth sealing ring 26 are provided between the closing sliding sleeve 18 and the lower limiting body 17 .

[0095] In a specific embodiment, referring to Figure 3 As shown, a fifth sealing ring 27 is provided between the lower limit body 17 and the central tube 5. For details, refer to Fig. 9 As shown, the lower limiting body 17 is provided with a third sealing groove 1701 , and the fifth sealing ring 27 is provided in the third sealing groove 1701 .

[0096] In a specific embodiment, referring to Figure 3 As shown, a sixth sealing ring 28 is provided between the sliding member 16 and the central tube 5, and a third sealing ring 25 is provided between the sliding member 16 and the lower limit body 17. For details, refer to Figure 8 As shown, the sliding member 16 is provided with a first sealing groove 1602 and a second sealing groove 1603 , the sixth sealing ring is provided in the first sealing groove 1602 , and the third sealing ring 25 is provided in the second sealing groove 1603 .

[0097] In a further embodiment, referring to Fig.10As shown, the hydraulic drive assembly also includes an opening ball 31, and a first through hole 3005 is provided at the bottom of the opening sleeve 30. The opening ball 31 closes the first through hole 3005, and the opening sleeve 30 is disconnected from the lower limit body 17. The opening sleeve 30 moves toward the sleeve cover 29 until the first shaft shoulder 3003 abuts against the slide cover, so that the first drive liquid channel 1706 is opened and enters the first state.

[0098] In a further embodiment, referring to Figure 1 and Figure 2 As shown, the hydraulic drive assembly also includes a closing ball 32, the auxiliary sleeve 21 is provided with a second through hole (not shown in the figure), the closing ball 32 closes the second through hole, the closing sleeve 18 is disconnected from the lower limit body 17, the closing sleeve 18 and the auxiliary sleeve 21 move toward the opening sleeve 30 as a whole until the closing sleeve 18 abuts against the opening sleeve 30, and the closing sleeve 18 blocks the first driving fluid channel 1706, so that the first driving fluid channel 1706 is closed and enters the second state.

[0099] In a further embodiment, referring to Fig.10 As shown, the opening sleeve 30 is provided with a second driving liquid channel 3004. In the second state, the auxiliary sleeve 21 is disconnected from the closing sleeve 18, the auxiliary sleeve 21 and the closing ball 32 move to the bottom of the opening sleeve 30, and the driving liquid is discharged from the second driving liquid channel 3004 to establish a circulation.

[0100] In some embodiments, reference Figure 1 and Figure 2 As shown, the hydraulic drive assembly also includes a forced recovery seat 4 and a forced recovery ball 33, the forced recovery seat 4 is sleeved on the central pipe 5 and abuts against the elastic member mounting seat 6, the upper limit body 3 is sleeved on the forced recovery seat 4 and connected to the forced recovery seat 4, and the forced recovery ball 33 is used to close the forced recovery seat 4; the drilling reaming device also includes the following states:

[0101] In the third state, the forced recovery ball 33 closes the forced recovery seat 4, the forced recovery seat 4 is disconnected from the upper limit body 3, and the forced recovery seat 4 pushes the elastic member mounting seat 6 to move, thereby pushing the blade wing 121 to move along the inclined groove 101 and radially contract.

[0102] In some embodiments, reference Figure 7 As shown, the forced recovery seat 4 is provided with a third driving liquid channel 402 . In the third state, the driving liquid is discharged from the central tube 5 through the third driving liquid channel 402 to establish circulation.

[0103] In the embodiment of the present invention, refer to Figure 2 , Figure 6 and Figure 7 As shown, the first pin 3 is provided with a first pin hole 301, the forced recovery seat 4 is provided with a second pin hole 401, and the forced recovery seat 4 is connected to the upper limit body 3 through the fourth pin 2 passing through the first pin hole 301 and the second pin hole 401. If an unexpected situation occurs and the blade of the blade body 12 cannot be effectively retracted by the elastic force of the elastic member 9, the forced recovery ball 33 is inserted to cut off the fourth pin 2, the forced recovery seat 4 moves downward, and the blade wing 121 is forcibly pushed to be retracted through the elastic member mounting seat 6, and the driving liquid establishes a circulation through the third driving liquid channel 402.

[0104] In some embodiments, the reaming while drilling device further includes an elastic member support plate 11 which is sleeved on the central pipe 5, and the elastic member support plate 11 is located between the elastic member 9 and the cutter body 12. The elastic member support plate 11 can better increase the support surface of the elastic member 9, so that the force of the elastic member 9 is more uniform, so that during the movement of the cutter body 12, the stretching and contraction of the elastic member 9 are all along the radial direction of the body 1, which can play a certain protective role on the cutter body 12.

[0105] In the embodiment of the present invention, the elastic member 9 can be an elastic member, the spring is sleeved on the central tube 5 , one end of the spring is disposed on the elastic member mounting seat 6 , and the other end abuts against the elastic member support plate 11 .

[0106] Reference Figure 6 As shown, the upper limit body 3 is provided with a second thread 302 , and the distance between the elastic member mounting seat 6 and the elastic member supporting plate 11 is adjusted by the screwing depth of the second thread 302 , so as to set the maximum opening degree of the blade wing 121 of the blade body 12 .

[0107] In some embodiments, reference Figure 3 As shown, the drilling reaming device further includes a limit block 10 which is sleeved on the elastic member mounting seat 6. In the first state, the limit block 10 abuts against the elastic member support plate 11 to guide the movement of the elastic member support plate 11. The limit block 10 guides the movement of the elastic member support plate 11 so that the elastic member support plate 11 remains along the radial direction of the body 1 during movement. When contacting the elastic member mounting seat 6, the elastic member support plate 11 will not tilt and touch the elastic member mounting seat 6. Once the elastic member support plate 11 touches the elastic member mounting seat 6, the elastic member 9 will no longer be compressed.

[0108] In some embodiments, reference Figure 6As shown, a limiting protrusion 303 is provided at one end of the upper limit body 3 close to the elastic member mounting seat 6, and the forced recovery seat 4 is provided with a second shoulder 403. In the third state, the forced recovery seat 4 pushes the elastic member mounting seat 6 to move until the second shoulder 403 abuts against the limiting protrusion 303.

[0109] In some embodiments, reference Figure 7 As shown, a first thread 404 is provided at the position where the forced recovery ball seat and the central tube 5 are nested, and the forced recovery ball seat and the central tube 5 are connected via the first thread 404 .

[0110] In some embodiments, reference Figure 1 and Figure 8 As shown, the sliding member 16 is provided with an annular groove 1604, and the main body 1 is provided with a cooling water channel 102 at a position corresponding to the annular groove 1604, and the annular groove 1604 is used to allow the driving liquid to enter the cooling water channel 102, and the cooling water channel 102 is used to spray the driving liquid toward the blade 121 to clean the blade 121 and cool the blade 121.

[0111] In some embodiments, reference Figure 8 As shown, a fourth drive fluid channel 1605 is provided at one end of the sliding member 16 close to the opening sleeve 30 , for allowing the drive fluid to enter the annular groove 1604 from the annular space.

[0112] In some embodiments, reference Figure 1 and Figure 8 As shown, the drilling reaming device also includes a cutter body support plate 13 , and a third shoulder 1601 is provided at one end of the sliding member 16 close to the elastic member mounting seat 6 . The cutter body support plate 13 is sleeved on the sliding member 16 and abuts against the third shoulder 1601 .

[0113] In some embodiments, reference Figure 3 As shown, the drilling reaming device further includes a clamping block 14 , and the clamping block 14 is connected to the cutter body support plate 13 .

[0114] In a specific embodiment, referring to Figure 3 As shown, the clamping block 14 is connected to the blade support plate 13 via bolts 15 .

[0115] The working principle of the drilling reamer is as follows:

[0116] (1) When the drilling operation needs to be expanded, the opening ball 31 is first put into operation, the third pin 22 is sheared off by holding pressure, the sliding sleeve 30 is opened and moved downward, the first shaft shoulder 3003 is in contact with the sliding sleeve cover 29, and the driving fluid enters the piston 16 through the first driving fluid channel 1706. The piston 16 pushes the cutter body 12 to move under the pressure of the driving fluid, so that the blade 121 moves along the inclined groove 101 on the body 1 and expands radially. The cutter body 12 pushes the elastic member support plate 11 to move and compress the elastic member 9. When the elastic member support plate 11 contacts the elastic member mounting seat 6, the blade 121 expands to the maximum position, and then the expansion operation is performed;

[0117] (2) After the hole reaming operation is completed, the closing ball 32 is put in, and the closing ball 32 encounters the auxiliary sleeve 21 and starts to hold pressure, cutting off the first pin 19, and the closing sleeve 18, the second pin 20 and the auxiliary sleeve 21 move downward as a whole, and the closing sleeve 18 abuts against the opening sleeve 30, and the first drive fluid channel 1706 is closed. The blade 121 is retracted under the push of the elastic member 9, and continues to hold pressure, cutting off the second pin 20, and the closing ball 32 and the auxiliary sleeve 21 fall to the bottom of the opening sleeve 30. The drive fluid establishes circulation through the second drive fluid channel 3004, and then drilling can continue or full displacement can be pulled out;

[0118] (3) If an unexpected situation occurs and the blade 1 cannot be effectively retracted by the elastic member 9, the forced recovery ball 33 is inserted to cut the fourth pin 2, and the forced recovery ball seat 4 moves downward, and the blade 12 is forcibly retracted through the elastic member mounting seat 6, and the driving fluid is circulated through the third driving fluid channel 402.

[0119] Embodiment 2

[0120] The embodiment of the present invention provides a method for using a drilling-while-reaming device, which is used for the drilling-while-reaming device described in the first embodiment, comprising:

[0121] Step S101: inserting the opening ball 31 from the end of the main body 1 close to the upper limit body 3, so that the first driving liquid channel 1706 is opened, and the blade 121 moves along the inclined groove 101 and expands radially to perform the hole expansion operation;

[0122] Step S102: The closing ball 32 is dropped from the end of the main body 1 close to the upper limit body 3, so that the first driving fluid channel 1706 is closed, the blade 121 is retracted, and drilling continues or the drilling is started at full displacement.

[0123] In the above step S101, after the opening ball 31 is put into the reaming while drilling device, the opening ball 31 closes the first through hole 3005 of the reaming while drilling device, and the opening sleeve 30 of the reaming while drilling device is disconnected from the lower limit body 17, so that the opening sleeve 30 moves toward the sleeve cover 29 until the first shaft shoulder 3003 abuts against the slide cover sleeve, so that the first driving liquid channel 1706 is opened, and the reaming while drilling device is in the first state. At this time, the sliding member 16 pushes the blade body 12 and the elastic member 9 to move under the action of the driving liquid pressure, and makes the blade wing 121 move along the inclined groove 101 and expand radially until the blade body 12 contacts the elastic member mounting seat 6, and the reaming operation is performed;

[0124] In the above step S102: after the reaming operation is completed, a closing ball 32 is put into the reaming while drilling device, and the closing ball 32 closes the second through hole of the reaming while drilling device. The closing sleeve 18 of the reaming while drilling device is disconnected from the lower limit body 17, so that the closing sleeve 18 and the auxiliary sleeve 21 move toward the opening sleeve 30 as a whole until the closing sleeve 18 abuts against the opening sleeve 30, so that the closing sleeve 18 blocks the first driving fluid channel 1706, so that the first driving fluid channel 1706 is closed, and the reaming while drilling device is in the second state. At this time, the blade 121 is retracted under the push of the compressed elastic member 9, and drilling continues or drilling is started at full displacement.

[0125] In a specific embodiment, the method for using the drilling-while-reaming device further includes:

[0126] Step S103: inserting the forced recovery ball 33 from the end of the main body 1 close to the upper limit body 3, so that the forced recovery seat 4 pushes the elastic member mounting seat 6 to move, thereby pushing the blade 121 to move along the inclined groove 101 and contract radially.

[0127] In the above step S103: if the blade 121 fails to be successfully recovered when the drilling reaming device is in the second state through the above step S102, a forced recovery ball 33 is thrown into the drilling reaming device, and the forced recovery seat 4 is closed by the forced recovery ball 33, so that the first pin 2 is cut off, and the drilling reaming device is in the third state. At this time, the forced recovery seat 4 pushes the elastic member mounting seat 6 to move, thereby pushing the blade 121 to move along the inclined groove 101 and radially contract until the second shaft shoulder 403 abuts against the limiting protrusion 303, and the blade 121 is completely recovered.

[0128] The specific implementation method of the method for using the above-mentioned reaming while drilling device provided in the embodiment of the present invention can refer to the above-mentioned detailed description of the reaming while drilling device, and the repeated parts will not be repeated here.

[0129] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0130] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A hole expansion device while drilling, characterized in that: The invention comprises a main body, and an upper limit body, a center tube, an elastic member mounting seat, an elastic member, a cutter body, a sliding member and a hydraulic drive assembly located inside the main body, wherein: The upper limit body, the elastic member mounting seat, the elastic member, the cutter body, the sliding member and the hydraulic drive assembly are sequentially sleeved on the central tube; The end of the upper limit positioning body abuts against the elastic member mounting seat, and the upper limit positioning body can move along the body and can be fixed at a preset position of the body, so that there is a first preset distance between the elastic member mounting seat and the knife body; The elastic member is placed between the elastic member mounting seat and the cutter body; The body is provided with a plurality of inclined grooves along the axial direction, and the angle between the inclined grooves and the axis of the body is an acute angle; The blade body is provided with a plurality of blade wings corresponding to the inclined grooves one by one, and the blade wings are provided with protrusions matching the inclined grooves, and the protrusions are embedded in the inclined grooves; The hydraulic drive assembly is at least partially embedded in the sliding member and forms an annulus portion between the hydraulic drive assembly and the sliding member, and the hydraulic drive assembly is provided with a first drive fluid channel leading to the annulus portion; The drilling reaming device includes at least the following two states: In the first state, the first driving fluid channel is opened, and the sliding member pushes the blade body and the elastic member to move under the driving fluid pressure, and causes the blade wing to move along the inclined groove and expand radially until the blade body contacts the elastic member mounting seat; In the second state, the first driving fluid channel is closed, and the blade is retracted under the elastic force of the elastic member; The upper limit positioning body is threadedly connected to the main body, and the upper limit positioning body is moved along the main body through the threaded connection, and the upper limit positioning body is fixed at a preset position of the main body. The first preset distance between the elastic member mounting seat and the knife body is adjusted by adjusting the depth of the upper limit positioning body screwed into the main body.

2. The hole expansion while drilling device according to claim 1, characterized in that: The hydraulic drive assembly includes a lower limiter connected to the body; The lower limit body is partially embedded in the sliding member, and the annular portion is formed between the lower limit body and the sliding member; The first driving liquid channel is arranged on the lower limiting body.

3. The hole expansion while drilling device according to claim 2, characterized in that: The hydraulic drive assembly also includes an opening sleeve, a sleeve cover, a closing sleeve and an auxiliary sleeve; The opening sliding sleeve and the closing sliding sleeve are sequentially embedded in the lower limit body, and the closing sliding sleeve is arranged close to one side of the knife body; The sliding sleeve cover is sleeved on the opening sliding sleeve, and annular protrusions are axially arranged at both ends of the sliding sleeve cover, and the annular protrusions are sleeved on the lower limit body and connected to the lower limit body; The opening sleeve is provided with a first shaft shoulder, the opening sleeve is embedded in the lower limit body and connected to the lower limit body, so that there is a second preset distance between the first shaft shoulder and the sleeve cover, and the opening sleeve blocks the first driving liquid channel; The closing sliding sleeve is connected to the lower limit body; The auxiliary sliding sleeve is embedded in the closing sliding sleeve and connected to the closing sliding sleeve.

4. The hole expansion while drilling device according to claim 3, characterized in that: The hydraulic drive assembly also includes an opening ball; A first through hole is provided at the bottom of the opening sleeve. When the opening sphere closes the first through hole, under the action of the driving liquid pressure, the opening sleeve is disconnected from the lower limit body, and the opening sleeve moves toward the sleeve cover until the first shaft shoulder abuts against the sleeve cover, so that the first driving liquid channel is opened and the drilling reaming device enters the first state.

5. The hole expansion while drilling device according to claim 4, characterized in that: The hydraulic drive assembly also includes a closing ball; The auxiliary sleeve is provided with a second through hole. When the closing ball closes the second through hole, under the action of the driving liquid pressure, the closing sleeve is disconnected from the lower limit body, and the closing sleeve and the auxiliary sleeve move toward the opening sleeve as a whole until the closing sleeve abuts against the opening sleeve. The closing sleeve blocks the first driving liquid channel, so that the first driving liquid channel is closed, and the drilling reaming device enters the second state.

6. The hole expansion while drilling device according to claim 5, characterized in that: The opening sleeve is provided with a second driving liquid channel; In the second state, the auxiliary sleeve is disconnected from the closing sleeve, and the auxiliary sleeve and the closing ball move to the bottom of the opening sleeve, so that the driving fluid is discharged from the second driving fluid channel.

7. The hole expansion while drilling device according to claim 6, characterized in that: The hydraulic drive assembly also includes a forced recovery seat and a forced recovery ball; The forced recovery seat is sleeved on the central tube and abuts against the elastic member mounting seat; The upper limit position body is disposed outside the forced recovery seat and is connected to the forced recovery seat; The forced recovery ball is used to close the forced recovery seat; the drilling reaming device also includes a third state: In the third state, the forced recovery ball closes the forced recovery seat, the forced recovery seat is disconnected from the upper limit body, and the forced recovery seat pushes the elastic member mounting seat to move, thereby driving the blade to move along the inclined groove and contract radially.

8. The hole expansion while drilling device according to claim 7, characterized in that: The forced recovery seat is provided with a third driving liquid channel, so that the driving liquid is discharged from the central tube through the third driving liquid channel.

9. The hole expansion while drilling device according to claim 8, characterized in that: It also includes an elastic member support plate which is sleeved on the central tube; The elastic member support plate is located between the elastic member and the knife body.

10. The hole expansion while drilling device according to claim 9, characterized in that: It also includes a limiting block which is sleeved on the elastic member mounting seat; In the first state, the limit block abuts against the elastic member support plate to guide the movement of the elastic member support plate.

11. The hole expansion while drilling device according to claim 10, characterized in that: The upper limit body is provided with a limit protrusion at one end close to the elastic member mounting seat, and the forced recovery seat is provided with a second shaft shoulder; In the third state, the forced recovery seat pushes the elastic member mounting seat to move until the second shaft shoulder abuts against the limiting protrusion.

12. The hole expansion while drilling device according to claim 11, characterized in that: A first thread is provided at a position where the forced recovery ball seat and the central tube are nested, and the forced recovery ball seat and the central tube are connected via the first thread.

13. The hole expansion while drilling device according to claim 12, characterized in that: The sliding member is provided with an annular groove, and the body is provided with a cooling water channel at a position corresponding to the annular groove, so that the driving liquid enters the cooling water channel through the annular groove and is sprayed toward the blade.

14. The hole expansion while drilling device according to claim 13, characterized in that: A fourth drive fluid passage is provided at one end of the sliding member close to the open sliding sleeve, so that the drive fluid enters the annular groove from the annular space.

15. The hole expansion while drilling device according to claim 14, characterized in that: It also includes a knife body support plate, and a third shoulder is provided at one end of the sliding member close to the elastic member mounting seat; The tool body supporting plate is externally mounted on the sliding member and abuts against the third shaft shoulder.

16. The hole expansion while drilling device according to claim 15, characterized in that: Also includes card blocks; The clamping block is connected to the knife body supporting plate.

17. A method for using a drilling-while-reaming device, used for the drilling-while-reaming device according to any one of claims 6 to 16, characterized in that: include: An opening ball is inserted from one end of the main body close to the upper limit body, so that the first driving liquid channel is opened, and the blade moves along the inclined groove and expands radially to perform the hole expansion operation; A closing ball is inserted from one end of the main body close to the upper limit body, so that the first drive fluid channel is closed, the blade is retracted, and drilling continues or drilling is started at full displacement.

18. The method for using the drilling-while-reaming device according to claim 17, characterized in that: Also includes: The hydraulic drive assembly also includes a forced recovery seat and a forced recovery ball; The forced recovery seat is sleeved on the central tube and abuts against the elastic member mounting seat; A forced recovery ball is thrown in from one end of the main body close to the upper limit body, so that the forced recovery seat pushes the elastic component mounting seat to move, thereby pushing the blade to move along the inclined groove and contract radially.

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