CN213175519U

CN213175519U - Novel reaming tool while drilling

Info

Publication number: CN213175519U
Application number: CN202022202056.9U
Authority: CN
Inventors: 何世明; 黄韬; 李华军; 何浪; 姚耕华; 李鑫
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-11
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a novel reaming while drilling instrument, including the drill bit body, be provided with the cavity in the drill bit body, the bottom inside wall fixedly connected with fixed plate of cavity, the bottom fixedly connected with motor of fixed plate, the two-way screw thread lead screw of output shaft fixedly connected with of motor, two movable blocks have been cup jointed to the lateral wall screw thread of two-way screw thread lead screw. The eye protection bodies in the utility model can be contracted into the drill bit body, the work is reliable, the diameter expansion amount is not limited by the inner diameter of the casing pipe of the upper well section, in addition, the distance between the two eye protection bodies can be adjusted according to the hole expansion requirement, and the applicability of the eye protection tool is improved; the utility model provides an eye-protecting body's quantity has two, has increased eye-protecting body's quantity, because the life of single eye-protecting body is limited, increases the loss degree that eye-protecting body's quantity can wholly reduce the eyeshield instrument, has improved the life of this eyeshield instrument.

Description

Novel reaming tool while drilling

Technical Field

The utility model relates to a probing technical field, more specifically say, in particular to novel reaming while drilling instrument.

Background

The reaming-while-drilling technology is a new drilling technology with development potential. The reaming-while-drilling technology is a drilling technology which adopts a reaming-while-drilling tool to be matched with a conventional drill bit (a PDC drill bit or a roller bit) program to comprehensively drill and simultaneously enlarge the diameter of a borehole. The reaming while drilling technology is beneficial to well cementation of small well sections of deep wells/ultra-deep wells, can increase the size of production casings and is beneficial to well completion and well repair operation.

The reaming tools developed and used at home and abroad mainly comprise a double-center reaming drill and a hydraulic telescopic reaming tool; the former uses the eccentric block outside the double-center reaming bit to perform diameter expansion under the revolution of the bit, the operation is reliable, but the diameter expansion amount is limited by the inner diameter of the upper well section casing. The latter uses the flexible eye-protecting body to realize expanding, the upper well section sleeve pipe inner diameter has less restriction to expanding quantity, can realize expanding of larger displacement, the expanding mode determines expanding reliability, the existing telescopic eye-expanding tool mostly depends on the spring and hydraulic mode to realize expanding of the eye-protecting body, the structure is complex, and maintenance is inconvenient.

Therefore, a novel reaming-while-drilling tool is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems existing in the prior art and providing a novel reaming-while-drilling tool.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a novel reaming while drilling instrument, includes the drill bit body, be provided with the cavity in the drill bit body, the bottom inside wall fixedly connected with fixed plate of cavity, the bottom fixedly connected with motor of fixed plate, the two-way screw lead screw of output shaft fixedly connected with of motor, two movable blocks have been cup jointed to the lateral wall screw thread of two-way screw lead screw, the both sides of movable block all are connected with the eye protection body through the link gear, be provided with the expansion gap that corresponds with the eye protection body on the drill bit body, the expansion gap communicates with each other with the cavity, be provided with the sharp tooth on the wing of the eye protection body.

Preferably, the inner side wall of the cavity is fixedly connected with a fixed block, the fixed block is connected with the outer side wall of the middle part of the bidirectional threaded screw rod through a bearing, and the fixed block is provided with a mounting hole corresponding to the bearing.

Preferably, the end, far away from the motor, of the bidirectional threaded screw rod passes through the bearing and the inner top of the cavity, and the inner top of the cavity is provided with a mounting groove corresponding to the bearing.

Preferably, one side of the eye protection body close to the bidirectional threaded lead screw is fixedly connected with a U-shaped block, two sides of the moving block are respectively provided with a groove, the inner side wall of the U-shaped block and the inner side wall of the groove are respectively provided with a rotating piece, and the two rotating pieces are connected through a connecting rod.

Preferably, each eye protection body is fixedly provided with two U-shaped blocks, and the two U-shaped blocks are symmetrically arranged.

Preferably, the two eye protective bodies are symmetrically arranged.

The embodiment of the utility model provides a technical scheme can include following beneficial effect:

1. compared with the prior art, the eye protection body in the utility model can be contracted into the drill bit body, the work is reliable, the expanding amount is not limited by the inner diameter of the casing pipe of the upper well section, in addition, the distance between the two eye protection bodies can be adjusted according to the expanding requirement, and the applicability of the eye protection tool is improved;

2. compared with the prior art, the number of the eye protection bodies in the utility model is two, which increases the number of the eye protection bodies, because the service life of a single eye protection body is limited, the increase of the number of the eye protection bodies can reduce the loss degree of the eye protection tool as a whole, and improve the service life of the eye protection tool;

3. compared with the prior art, the utility model discloses in, this eyeshield instrument simple structure, it is simple to the regulative mode of the eyeshield body, makes things convenient for the eyeshield body to extend the drill bit body or contract to the drill bit internal, and application scope is wide, has fine market prospect.

Drawings

Fig. 1 is a schematic structural view of a novel reaming-while-drilling tool provided by the present invention;

fig. 2 is a schematic view of an internal structure of the novel reaming-while-drilling tool provided by the present invention;

fig. 3 is a schematic structural diagram at a in fig. 2.

In the figure: 1. a bit body; 2. a cavity; 3. a bidirectional threaded screw rod; 4. a fixed block; 5. a bearing; 6. an eye protection body; 7. a fixing plate; 8. a motor; 9. a moving block; 10. a U-shaped block; 11. a connecting rod; 12. and a rotating member.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a novel reaming while drilling tool, including drill bit body 1, be provided with cavity 2 in the drill bit body 1, the bottom inside wall fixedly connected with fixed plate 7 of cavity 2, the bottom fixedly connected with motor 8 of fixed plate 7, the output shaft fixedly connected with two-way screw lead screw 3 of motor 8, two movable blocks 9 have been cup jointed to the lateral wall screw thread of two-way screw lead screw 3, the both sides of movable block 9 all are connected with the eye protection body 6 through the link gear, be provided with the expansion gap that corresponds with the eye protection body 6 on the drill bit body 1, the expansion gap communicates with each other with cavity 2, be provided with the sharp tooth on the wing of the eye.

The motor 8 rotates to drive the bidirectional threaded lead screw 3 to rotate, the two moving blocks 9 are adjusted to move towards opposite or opposite directions, when the two moving blocks 9 move towards opposite directions, the eye protecting bodies 6 extend out of the drill bit body 1 to expand the drilled holes, and when the two moving blocks 9 move towards opposite directions, the eye protecting bodies 6 extending out of the drill bit body 1 gradually contract into the drill bit body 1, so that the limitation of the inner diameter of a casing pipe at the upper well section can be avoided. In addition, the size of the reaming for drilling can be adjusted, the reaming is not limited to a fixed size, only the distance between the two eye protection bodies 6 needs to be adjusted, and the reaming device has good applicability.

The inside wall fixedly connected with fixed block 4 of cavity 2, fixed block 4 passes through bearing 5 and is connected with the middle part lateral wall of two-way screw lead screw 3, is provided with the installing port that corresponds with bearing 5 on the fixed block 4.

The fixed block 4 is used for supporting the two-way threaded screw rod 3 and preventing the two eye protection bodies 6 from being subjected to relative movement force, so that the two-way threaded screw rod 3 is bent.

The one end that motor 8 was kept away from to two-way screw lead screw 3 passes through the interior top of bearing 5 and cavity 2, and the interior top of cavity 2 is provided with the mounting groove that corresponds with bearing 5.

Be convenient for provide the support for the one end that motor 8 was kept away from to two-way screw lead screw 3, prevent that the one end that motor 8 was kept away from to two-way screw lead screw 3 from taking place to rock.

One side fixedly connected with U type piece 10 that eye protector 6 is close to two-way screw lead screw 3, and the both sides of movable block 9 all are provided with the recess, and the inside wall of U type piece 10 and the inside wall of recess all are provided with rotates piece 12, and two rotate piece 12 and pass through connecting rod 11 and connect.

The distance between the two eye protection bodies 6 is adjusted by changing the inclination angle between the connecting rod 11 and the two-way threaded screw rod 3, so that the positions of the eye protection bodies 6 can be adjusted conveniently.

Two U-shaped blocks 10 are fixedly arranged on each eye protection body 6, and the two U-shaped blocks 10 are symmetrically arranged.

The number of the eye protection bodies 6 is two, the number of the eye protection bodies 6 is increased, the service life of a single eye protection body 6 is limited, the loss degree of the eye protection tool can be integrally reduced by increasing the number of the eye protection bodies 6, and the service life of the eye protection tool is prolonged.

The two eye protection bodies 6 are symmetrically arranged.

The utility model discloses in, when needs use this eyeshield instrument to expand the eye to drilling, rotate through motor 8 and drive two-way screw lead screw 3 and rotate, adjust two movable blocks 9 toward relative direction motion, contained angle crescent between 11 two-way screw lead screws 3 of connecting rod, outside eyeshield 6 extends drill bit body 1, expand the eye to drilling. When the two moving blocks 9 move in opposite directions, the eye protector 6 extending out of the bit body 1 gradually shrinks into the interior of the bit body 1 and is not limited by the inner diameter of the casing of the upper well section. In addition, the size of the reaming for drilling can be adjusted, the reaming is not limited to a fixed size, only the distance between the two eye protection bodies 6 needs to be adjusted, and the reaming device has good applicability.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a novel reaming while drilling instrument, includes drill bit body (1), its characterized in that, be provided with cavity (2) in drill bit body (1), the bottom inside wall fixedly connected with fixed plate (7) of cavity (2), the bottom fixedly connected with motor (8) of fixed plate (7), the output shaft fixedly connected with two-way screw lead screw (3) of motor (8), two movable blocks (9) have been cup jointed to the lateral wall screw thread of two-way screw lead screw (3), the both sides of movable block (9) all are connected with through the link gear and protect eye body (6), be provided with the expansion gap that corresponds with protecting eye body (6) on drill bit body (1), the expansion gap communicates with each other with cavity (2), be provided with the pointed tooth on the wing of protecting eye body (6).

2. The novel reaming while drilling tool as claimed in claim 1, wherein a fixing block (4) is fixedly connected to the inner side wall of the cavity (2), the fixing block (4) is connected with the outer side wall of the middle portion of the bidirectional threaded screw rod (3) through a bearing (5), and a mounting opening corresponding to the bearing (5) is formed in the fixing block (4).

3. The novel reaming while drilling tool as claimed in claim 2, wherein one end of the bidirectional threaded screw rod (3) far away from the motor (8) passes through the bearing (5) and the inner top of the cavity (2), and the inner top of the cavity (2) is provided with a mounting groove corresponding to the bearing (5).

4. The novel reaming-while-drilling tool as claimed in claim 1, wherein a U-shaped block (10) is fixedly connected to one side of the eye protection body (6) close to the bidirectional threaded screw rod (3), grooves are formed in two sides of the moving block (9), rotating pieces (12) are arranged on the inner side wall of the U-shaped block (10) and the inner side wall of each groove, and the two rotating pieces (12) are connected through a connecting rod (11).

5. The novel reaming-while-drilling tool as claimed in claim 1, wherein two U-shaped blocks (10) are fixedly arranged on each eye protection body (6), and the two U-shaped blocks (10) are symmetrically arranged.

6. The novel reaming-while-drilling tool as claimed in claim 1, wherein two said eye protectors (6) are symmetrically arranged.