Efficient composite screw drill

Abstract

The utility model relates to the technical field of oil exploitation equipment, in particular to an efficient composite screw drill which comprises a bypass valve assembly, an anti-falling assembly is connected to the lower portion of the bypass valve assembly, a motor assembly is connected to the lower portion of the anti-falling assembly, a universal shaft assembly is connected to the lower portion of the motor assembly, and the universal shaft assembly is connected to the lower portion of the bypass valve assembly. A transmission shaft assembly is connected to the lower portion of the universal shaft assembly, a transmission rod rotationally connected with the transmission shaft assembly is arranged on the transmission shaft assembly, a hollow mounting block is fixedly connected to the bottom of the transmission rod, the outer wall of the hollow mounting block is sleeved with a drill bit, and a dismounting and mounting mechanism is arranged on the hollow mounting block. The drill bit can be mounted and dismounted through the dismounting and mounting mechanism, bolt mounting can be replaced, the bolt is prevented from rotating and loosening, stable connection of the drill bit is guaranteed, the hardness and the abrasion resistance of the drill bit are improved through the outer protection layer, the abrasion-resistant layer and the base layer, and the service life of the drill bit is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum exploitation equipment technical field especially relates to a kind of high-efficiency composite screw drill. BACKGROUND

[0002] With the development of oil and gas exploration and development, more and more screw drills are applied to deep well, ultra-deep well and other drilling operations; screw drill is a kind of volumetric downhole power drill that converts liquid pressure energy into mechanical energy with drilling fluid as power.

[0003] The existing screw drill and drill bit are installed and fixed by bolts. During drilling, the drill bit will vibrate due to the crushing of rocks in the ground. When the drill bit is continuously acting, the continuous vibration will cause the bolts to rotate and loosen, resulting in unstable installation of the screw drill and the drill bit, which makes the drill bit easy to fall off and causes problems such as danger during drilling operation. To solve the above problems, a high-efficiency composite screw drill is proposed in the present application. SUMMARY

[0004] The utility model aims at solving the shortcomings in the prior art and proposes a high-efficiency composite screw drill.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The high-efficiency composite screw drill comprises a bypass valve assembly, a falling prevention assembly connected below the bypass valve assembly, a motor assembly connected below the falling prevention assembly, a universal shaft assembly connected below the motor assembly, a transmission shaft assembly connected below the universal shaft assembly, a transmission rod rotatably connected to the transmission shaft assembly, a hollow mounting block fixedly connected to the bottom of the transmission rod, a drill bit sleeved on the outer wall of the hollow mounting block, a dismounting mechanism provided on the hollow mounting block, the dismounting mechanism comprising a motor fixedly connected to the inner wall of the hollow mounting block, a rotating rod fixedly connected to the output end of the motor, the rotating rod being rotatably connected to the inner wall of the hollow mounting block, a driving bevel gear fixedly connected to the outer wall of the rotating rod, two driven bevel gears meshing with the driving bevel gear, a threaded rod coaxially fixedly connected to each driven bevel gear, a limiting plate rotatably sleeved on the outer wall of each threaded rod, the two limiting plates being fixedly connected to the inner wall of the hollow mounting block, a moving column threadedly connected to the outer wall of each threaded rod, the two moving columns penetrating through the hollow mounting block and being slidably connected thereto, two grooves formed in the drill bit, the two moving columns being respectively inserted into the corresponding grooves, and the drill bit being made of an outer protective layer, a wear-resistant layer and a base layer from outside to inside.

[0007] In order to better achieve the above object, the utility model adopts further technical scheme: the hollow mounting block's cross section is rectangular setting, the drill bit is set with the slot, the hollow mounting block is inserted into the slot setting.

[0008] In order to better achieve the above object, the utility model adopts further technical scheme: the mobile column's cross section is square setting, the recess's cross section is square setting.

[0009] In order to better achieve the above object, the utility model adopts further technical scheme: the outer protective layer's material is titanium nitride coating.

[0010] In order to better achieve the above object, the utility model adopts further technical scheme: the wear layer's material is diamond coating.

[0011] In order to better achieve the above object, the utility model adopts further technical scheme: the wear layer's material is diamond coating.

[0012] The utility model has the advantages of:

[0013] 1, by motor drive rotating rod, driving bevel gear, two driven bevel gears, threaded rod are rotated, make the mobile column of two sides relative movement, until two mobile columns are inserted into the recess respectively, can take down the drill bit, replaces the bolt installation, avoids the bolt autorotation and makes it loose, guarantees the firmness of drill bit connection.

[0014] 2, by the slot on the drill bit is inserted to the hollow mounting block, at this time remote start motor makes its output end reverse rotation, makes the mobile column of two sides opposite movement until two mobile columns are inserted into the recess respectively, completes the installation fixed of drill bit, can complete the dismounting replacement of drill bit, can replace bolt installation, avoids the bolt autorotation and makes it loose, guarantees the firmness of drill bit connection.

[0015] 3, by setting the outer protective layer, wear layer and base layer increase the hardness and wear resistance of drill bit, prolong the service life of drill bit.

[0016] Summarized above, through dismounting mechanism can install the drill bit and dismount, can replace bolt installation, avoids the bolt autorotation and makes it loose, guarantees the firmness of drill bit connection, through setting the outer protective layer, wear layer and base layer increase the hardness and wear resistance of drill bit, prolong the service life of drill bit. ACCURACY OF DRAWINGS

[0017] Figure 1 It is the structure schematic drawing of efficient composite screw drill rig that the utility model proposes;

[0018] Figure 2 It is the first schematic drawing of partial structure of efficient composite screw drill rig that the utility model proposes;

[0019] Figure 3 Part structure second schematic view of high efficiency composite screw drill put forward in the utility model;

[0020] Figure 4 For Figure 3 Structure enlarged view at A in the middle;

[0021] Figure 5 Material structure schematic view of drill bit in high efficiency composite screw drill put forward in the utility model.

[0022] In the figure: 1 bypass valve assembly, 2 anti-drop assembly, 3 motor assembly, 4 universal shaft assembly, 5 transmission shaft assembly, 6 transmission rod, 7 hollow mounting block, 8 drill bit, 9 slot, 10 motor, 11 rotating rod, 12 driving bevel gear, 13 driven bevel gear, 14 threaded rod, 15 limit plate, 16 moving column, 17 groove, 18 outer protective layer, 19 wear-resistant layer, 20 base layer. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0024] Refer to Figures 1-5, efficient composite screw drill, including bypass valve assembly 1, bypass valve assembly 1 below is connected with the anti-drop assembly 2, the anti-drop assembly 2 below is connected with motor assembly 3, motor assembly 3 below is connected with universal shaft assembly 4, universal shaft assembly 4 below is connected with transmission shaft assembly 5, transmission shaft assembly 5 is provided with transmission rod 6 rotationally connected therewith, the bottom of transmission rod 6 is fixedly connected with hollow mounting block 7, the outer wall of hollow mounting block 7 is sleeved with drill bit 8, the ground can be drilled by rotating drill bit 8, the cross section of hollow mounting block 7 is rectangularly arranged, the drill bit 8 is provided with a slot 9, the hollow mounting block 7 is inserted into the slot 9, the hollow mounting block 7 is provided with a dismounting mechanism, the dismounting mechanism comprises a motor 10 fixedly connected with the inner wall of the hollow mounting block 7, the output end of the motor 10 is fixedly connected with a rotating rod 11, the rotating rod 11 is rotationally connected with the inner wall of the hollow mounting block 7, the outer wall of the rotating rod 11 is fixedly connected with a driving bevel gear 12, the driving bevel gear 12 is engaged with two driven bevel gears 13, each driven bevel gear 13 is coaxially fixedly connected with a threaded rod 14, the outer wall of each threaded rod 14 is sleeved with a limiting plate 15 rotationally connected therewith, the two limiting plates 15 are fixedly connected with the inner wall of the hollow mounting block 7, the outer wall of each threaded rod 14 is sleeved with a moving column 16 threadedly connected therewith, the two moving columns 16 are both penetrated through the hollow mounting block 7 and are slidably connected therewith, the drill bit 8 is provided with two recesses 17, the two moving columns 16 are respectively inserted into the corresponding recesses 17, the cross section of the moving column 16 is square, the cross section of the recess 17 is square, the cross section of the moving column 16 is square, which can limit the movement of the moving column 16, when the moving column 16 is inserted into the recess 17 to complete the installation and fixation of the drill bit 8, the drill bit 8 can be dismounted and replaced when the moving column 16 is separated from the recess 17.

[0025] The material of the drill bit 8 is sequentially provided with an outer protective layer 18, a wear-resistant layer 19 and a base layer 20 from outside to inside, the material of the outer protective layer 18 is titanium nitride coating, which can provide certain corrosion resistance and is suitable for various processing environments, the material of the wear-resistant layer 19 is diamond coating, which has extremely high hardness and wear resistance, prolonging the service life of the drill bit 8, and the material of the base layer 20 is a composite material formed by high-temperature sintering of tungsten carbide and cobalt metal powder, which has extremely high hardness and wear resistance.

[0026] The utility model discloses a remote starting motor 10 when working, the motor 10 drives rotating rod 11, driving bevel gear 12, two driven bevel gear 13, threaded rod 14 are rotated to the relative movement of both sides mobile column 16, until two mobile column 16 respectively from recess 17 can take down drill bit 8, change drill bit 8, after replacing, the slot 9 of drill bit 8 is inserted to hollow mounting block 7, remote starting motor 10 makes its output end reverse rotation to make both sides mobile column 16 opposite movement until two mobile column 16 respectively insert recess 17, complete the installation fixed of drill bit 8, can complete the dismounting replacement of drill bit 8.

[0027] Through the cooperation of the dismounting mechanism, the outer protective layer, the wear-resistant layer and the base layer, the problem that the screw drill and the drill bit are installed and fixed through bolts in the prior art, the drill bit vibrates due to the rock crushing in the ground during the drilling process, the continuous vibration causes the bolts to rotate and loosen, the screw drill and the drill bit are not stably installed, the drill bit is easy to fall off, and the drilling operation is prone to danger.

Claims

1. A high efficiency composite screw drill comprising a bypass valve assembly (1), characterized in that, The bypass valve assembly (1) is connected with the anti-falling assembly (2), the anti-falling assembly (2) is connected with the motor assembly (3), the motor assembly (3) is connected with the universal shaft assembly (4), the universal shaft assembly (4) is connected with the transmission shaft assembly (5), the transmission shaft assembly (5) is provided with the transmission rod (6) rotatably connected with it, the bottom of the transmission rod (6) is fixedly connected with the hollow mounting block (7), the outer wall of the hollow mounting block (7) is sleeved with the drill bit (8), the hollow mounting block (7) is provided with the dismounting mechanism, the material of the drill bit (8) is sequentially provided with the outer protective layer (18), the wear-resistant layer (19) and the base layer (20) from outside to inside; The dismounting mechanism comprises the motor (10) fixedly connected with the inner wall of the hollow mounting block (7), the output end of the motor (10) is fixedly connected with the rotating rod (11), the rotating rod (11) is rotatably connected with the inner wall of the hollow mounting block (7), the outer wall of the rotating rod (11) is fixedly connected with the driving bevel gear (12), the driving bevel gear (12) is engaged with two driven bevel gears (13), each driven bevel gear (13) is coaxially fixedly connected with the threaded rod (14), the outer wall of each threaded rod (14) is sleeved with the limiting plate (15) rotatably connected with it, the limiting plates (15) are fixedly connected with the inner wall of the hollow mounting block (7), the outer wall of each threaded rod (14) is sleeved with the movable column (16) threadedly connected with it, the movable columns (16) are both penetrated through the hollow mounting block (7) and are slidably connected with it, the drill bit (8) is provided with two grooves (17), and the movable columns (16) are respectively inserted into the corresponding grooves (17).

2. The high-efficiency composite screw-stem drill string of claim 1, wherein, The cross section of the hollow mounting block (7) is rectangularly arranged, the drill bit (8) is provided with the insertion slot (9), and the hollow mounting block (7) is arranged by being inserted into the insertion slot (9).

3. The high-efficiency composite screw-stem drill string of claim 1, wherein, The cross section of the movable column (16) is squarely arranged, and the cross section of the groove (17) is squarely arranged.

4. The high-efficiency composite screw- drill of claim 1, wherein, The material of the outer protective layer (18) is a titanium nitride coating.

5. The high-efficiency composite screw- drill of claim 1, wherein, The material of the wear-resistant layer (19) is a diamond coating.

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