CN205618087U - Combined PDC bit - Google Patents

Combined PDC bit Download PDF

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Publication number
CN205618087U
CN205618087U CN201620391889.5U CN201620391889U CN205618087U CN 205618087 U CN205618087 U CN 205618087U CN 201620391889 U CN201620391889 U CN 201620391889U CN 205618087 U CN205618087 U CN 205618087U
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China
Prior art keywords
wing
pdc
bit
long wing
drill bit
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CN201620391889.5U
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Chinese (zh)
Inventor
张占奎
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CANGZHOU GREAT DRILL Co Ltd
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CANGZHOU GREAT DRILL Co Ltd
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Abstract

The utility model belongs to the technical field of the PDC drill bit, a combined PDC bit is disclosed for it can not be according to geology softness and hardness degree and the problem that results in drilling speed low of adjusting to solve present PDC drill bit. The utility model discloses a drill base body, last gauge protection teeth, long blade wings and the short knife wing of being provided with of drill base body, the long blade wings and the short knife wing separate the setting each other, the last distribution of long blade wings has major diameter PDC cutting teeth, it has minor diameter PDC cutting teeth to distribute on the short knife wing, long blade wings can be along drill base body's axis direction reciprocating motion, the last hydraulic pressure chamber that is parallel to each other with the drill base body axis direction of seting up of drill base body, long blade wings is connected with can be at the gliding piston rod of hydraulic pressure intracavity, the periphery in hydraulic pressure chamber is provided with a plurality of spacing grooves of evenly arranging, long blade wings is last be connected with one can stretch out and draw back and with the removable pin of the mutual adaptation of spacing groove, removable pin and drill base body's axis direction mutually perpendicular.

Description

A kind of combination type PDC drill bit
Technical field
This utility model belongs to PDC drill bit technical field, is specifically related to a kind of combination type PDC drill bit.
Background technology
The poly-diamond compact of PDC() drill bit is widely used in a kind of drill bit in oil, geology field, and it has higher hardness, wearability and service life.It is chip rock that PDC drill bit breaks the major way of rock, typically has 3-7 wing, ten several composite sheet due to it, and rock is again inhomogeneous, and therefore PDC drill bit operationally exists violent oscillation crosswise, weakens the efficiency of fractured rock.In order to suppress the oscillation crosswise of drill bit, part drill bit enhances gauge structure, and the diameter making gauge structure is more bigger than the diameter of drill bit, and gauge structure territory borehole wall large area is in close contact, thus effectively inhibits oscillation crosswise.
In the case of stratum is harder, the most do not use rifler, because rifler rate of penetration is slow, the life-span is short, frequently results in an extra bradawl operation, increase drilling time and operating cost.Therefore, for the place that stratum is harder, generally use rate of penetration PDC drill bit faster, to improve bit speed.
In prior art, the technical literature about PDC is the most more, the such as patent of Application No. 20142008408.2 discloses a kind of PDC drill bit, the wing including cylindrical bit body and being arranged on bit body and nozzle, wing includes wing and is positioned at the lower wing below wing, being provided with chip tooth on upper wing, the angle between raceway groove and the axis of bit body that adjacent two lower wings are formed is less than 35 degree more than 5 degree.
The patent of Application No. 201420087416.7 discloses a kind of high efficiency PDC drill bit, including bit body, 6 wings, the nozzle of bit body upper end and the connector of bit body lower end that are uniformly arranged on bit body, wing includes wing and is positioned at the lower wing of wing lower end, two row's chip teeth it are provided with on upper wing, often row's chip tooth all has 4 chip teeth, and upper wing is not parallel with lower wing.
The patent of Application No. 201420508187.1 discloses a kind of PDC drill bit, including organizing that matrix, runner, nozzle bore, wing and chip tooth, wing is arranged on bit matrix, wing includes chip portion and gauge, being provided with chip tooth in the chip portion of wing, gauge is connected with chip portion;Constituting runner between two wings, nozzle bore is arranged on bit matrix, also includes that gauge teeth and gauge tooth, gauge teeth and the gauge tooth that lies low that lies low is arranged in gauge;Chip tooth main body is cylindrical, one end be the arc surface other end be plane, chip tooth is horizontally installed on the two ends of wing, and plane one end is towards the outside of wing, and arc surface one end is towards the inner side of wing, and part slips in wing;Chip tooth is welded on wing;Also including that damping tooth, damping tooth are hard alloy, damping tooth is embedded in the side of wing;Gauge teeth is arranged on the front end of gauge, and shape and the mounting means of gauge teeth are identical with chip tooth;The gauge tooth that lies low is arranged on the side of gauge;The gauge tooth that lies low is for cylinder, and one end is arc surface, and other end is plane, and the lie low longitudinal axis of tooth of gauge is vertical with the side of gauge teeth portion, and the lie low arc surface of tooth of gauge is towards the outside of gauge, and planar ends is inlayed inside gauge.
Due to the soft or hard layer skewness on stratum, in order to improve the bit speed of PDC drill bit, prior art occurs in that combination type PDC drill bit, improved the rate of penetration of PDC drill bit by the common effect of major diameter PDC drill bit and minor diameter PDC drill bit.The such as patent of Application No. 200410036012.6 discloses a kind of oil and gas well drilling PDC drill bit altogether, including bit body (1), the operator wing (3), secondary wing (5), major diameter PDC cutting members (2), minor diameter PDC cutting members (4) and nozzle (6), it is characterized in that the operator wing (3) and time wing (5) occur in pairs, and be spaced from each other in drill bit circumference, major diameter PDC cutting members (2) is fixedly arranged in the operator wing (3), minor diameter PDC cutting members (4) is fixedly arranged on time wing (5), the thickness of major diameter PDC cutting members (2) and back rake angle α2It is respectively less than thickness and the back rake angle α of minor diameter PDC cutting members (4)1
Although this oil and gas well drilling PDC drill bit can improve the speed crept into, but existing PDC drill bit can not be automatically adjusted according to the situation of stratum soft or hard, thus causes PDC drill bit rate of penetration low.
Utility model content
This utility model can not adjust, in order to solve existing PDC drill bit, the problem causing rate of penetration low according to geology soft or hard degree;And a kind of combination type PDC drill bit is provided, it is possible to cut tooth according to the soft or hard degree on stratum for adjusting PDC, thus improve the speed crept into.
For solving above-mentioned technical problem, this utility model be the technical scheme is that
A kind of combination type PDC drill bit, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, it is characterized in that, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth being distributed on described long wing, minor diameter PDC is distributed cuts tooth on the described short sword wing, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix.
The sealing cavity being arranged with removable pin it is provided with on described long wing, in annular seal space body is stretched in one end of described removable pin and sealing cavity is divided into spring cavity and movable chamber, being provided with back-moving spring in described spring cavity, described movable chamber connects with outside hydraulic system through hydraulic oil pipeline.
Offering flow-guiding channel on described long wing, described hydraulic oil pipeline one end connects with movable chamber, and the other end of described hydraulic oil pipeline connects through flow-guiding channel with outside hydraulic system.
Offer the pin-and-hole that the axis direction with bit matrix is parallel to each other on described long wing, described bit matrix is provided with the alignment pin being mutually adapted with pin-and-hole.
It is provided with sealing structure between described alignment pin and pin-and-hole, between removable pin and sealing cavity and between piston rod and hydraulic cavities.
Described major diameter PDC cutting tooth and minor diameter PDC chip tooth in circular cone column.
The diameter of the described minor diameter PDC cutting increment being embedded on the short sword wing is less than the diameter of the exposed cutting tooth of minor diameter PDC outside the short sword wing.
The diameter of the described major diameter PDC cutting increment being embedded on long wing is less than the diameter of the exposed cutting tooth of major diameter PDC outside long wing.
Compared with prior art, this utility model has the advantages that
Combination type PDC drill bit of the present utility model, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth is distributed on described long wing, minor diameter PDC being distributed on the described short sword wing and cuts tooth, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix.Combination type PDC drill bit of the present utility model is during using, long wing can move back and forth along the axis direction of bit matrix, thus according to geology soft or hard situation in drilling process, select the effect that long wing, the short sword wing or long and short wing cut jointly, thus improve the speed crept into.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model one embodiment;
Fig. 2 is the partial enlargement figure structure schematic representation at Fig. 1 A;
Fig. 3 is end construction schematic diagram of the present utility model;
Labelling in figure: 1, bit matrix, 2, gauge teeth, 3, the short sword wing, 4, long wing, 5, minor diameter PDC cut tooth, 6, major diameter PDC cutting tooth, 7, jet through hole, 8, piston rod, 9, hydraulic cavities, 10, pin-and-hole, 11, alignment pin, 12, removable pin, 13, movable chamber, 14, back-moving spring, 15, spring cavity, 16, flow-guiding channel, 17, hydraulic oil pipeline, 18, stopper slot.
Detailed description of the invention
Below in conjunction with embodiment, the utility model will be further described, and described embodiment is only a part of embodiment of this utility model, is not whole embodiments.Based on the embodiment in this utility model, those of ordinary skill in the art obtained under not making creative work premise other used by embodiment, broadly fall into protection domain of the present utility model.
In conjunction with accompanying drawing, combination type PDC drill bit of the present utility model, including bit matrix 1, gauge teeth 2, long wing 4 and the short sword wing 3 it is provided with on described bit matrix 1, described long wing 4 and the spaced setting of the short sword wing 3, and form channel of chip removal between long wing 4 and the short sword wing 3, it is additionally provided with jet through hole 7 on bit matrix 1 of the present utility model, major diameter PDC cutting tooth 6 is distributed on described long wing 4, minor diameter PDC being distributed on the described short sword wing 3 and cuts tooth 4, described long wing 4 can move back and forth along the axis direction of bit matrix 1;The hydraulic cavities 9 being parallel to each other with bit matrix axis direction is offered on described bit matrix 1, wherein hydraulic cavities 9 connects with outside hydraulic system through pipeline, described long wing 4 connects the piston rod 8 that can slide in hydraulic cavities, the periphery of described hydraulic cavities 9 is provided with multiple stopper slot 18 being evenly arranged, connecting the removable pin 12 having can stretch and being mutually adapted with stopper slot 18 on described long wing 4, described removable pin 12 is mutually perpendicular to the axis direction of bit matrix 1.Combination type PDC drill bit of the present utility model is during using, long wing can move back and forth along the axis direction of bit matrix, thus according to geology soft or hard situation in drilling process, select the effect that long wing, the short sword wing or long and short wing cut jointly, thus improve the speed crept into.
Of the prior art also have the long wing that can move along bit matrix 1 axis direction, the such as patent of Application No. 200710120776.7, but the long wing of this PDC drill bit once cannot be further continued for motion only along axis direction motion, say, that is merely able to regulate once in drilling process.And the regulative mode of this PDC drill bit is to be pressurizeed by drilling rod, pin is sheared disconnected, it is relatively big that on the one hand this regulative mode needs to apply sizable pressure operation difficulty, on the other hand under huge pressure, is easily caused the situation that each articulated positions of bit matrix deforms.
Work process of the present utility model is: when the soft or hard degree of geological stratification changes (those skilled in the art just be can determine by the speed crept into), by outside hydraulic system hydraulic oil is delivered to hydraulic oil pipeline 16 thus removable pin 12 is extracted from stopper slot 18, then by pipeline input in hydraulic cavities or sucking-off hydraulic oil thus drive long wing 4 to move on the axis direction of bit matrix 1, until move to needs position;Outside hydraulic system hydraulic oil sucking-off in hydraulic oil pipeline 16 is by activity chamber 13 again, under the effect of back-moving spring 15, removable pin 12 engages with stopper slot 18 again, it is achieved the location of long wing 4, thus completes the process adjusted.This utility model is compared to existing technology, there is feature easy to adjust, that flexible adjustment is high, the regulation of various position is i.e. disclosure satisfy that by less ambient pressure, it is thus possible to concrete geologic structure is adjusted, PDC on long wing and short sword wing cutting tooth can be used in mixed way, meet creeping into of different geologic structure, improve the speed crept into.
The sealing cavity being arranged with removable pin it is provided with on long wing 4 of the present utility model, in annular seal space body is stretched in one end of described removable pin 12 and sealing cavity is divided into spring cavity 15 and movable chamber 13, being provided with back-moving spring 14 in described spring cavity 15, described movable chamber 13 connects with outside hydraulic system through hydraulic oil pipeline 16.
Offering flow-guiding channel 17 on described long wing 4, described hydraulic oil pipeline 16 one end connects with movable chamber 13, and the other end of described hydraulic oil pipeline 16 connects through flow-guiding channel 17 with outside hydraulic system.Wherein, bit matrix of the present utility model offers through hole, pass for pipeline and hydraulic oil pipeline.
The pin-and-hole 10 that the axis direction with bit matrix 1 is parallel to each other is offered on long wing 4 of the present utility model, it is provided with the alignment pin 11 being mutually adapted with pin-and-hole 10 on described bit matrix 1, realizes the long wing 4 location on bit matrix 1 by the common effect of alignment pin 11, removable pin 12 and piston rod 8 and fix.As a kind of preferably mode of this utility model, bit matrix 1 is provided with at least 3 alignment pins 11.
It is provided with sealing structure between alignment pin 11 of the present utility model and pin-and-hole 10, between removable pin 12 and sealing cavity and between piston rod 8 and hydraulic cavities 9.
As a kind of preferably mode of this utility model, described major diameter PDC cutting tooth 6 and minor diameter PDC chip tooth 5 in circular cone column;The diameter of the described minor diameter PDC cutting increment being embedded on the short sword wing is less than the diameter of the exposed cutting tooth of minor diameter PDC outside the short sword wing;The diameter of the described major diameter PDC cutting increment being embedded on long wing is less than the diameter of the exposed cutting tooth of major diameter PDC outside long wing.When, after PDC cutting odontotripsis, the width in the cutting face of PDC cutting tooth can reduce, thus ensures the effect of cutting, compared to prior art, it is possible to increase the service life of PDC cutting tooth so that PDC cutting tooth can make full use of.
Embodiment one
The combination type PDC drill bit of the present embodiment, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth is distributed on described long wing, minor diameter PDC being distributed on the described short sword wing and cuts tooth, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix.
Embodiment two
The combination type PDC drill bit of the present embodiment, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth is distributed on described long wing, minor diameter PDC being distributed on the described short sword wing and cuts tooth, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix;The sealing cavity being arranged with removable pin it is provided with on described long wing, in annular seal space body is stretched in one end of described removable pin and sealing cavity is divided into spring cavity and movable chamber, being provided with back-moving spring in described spring cavity, described movable chamber connects with outside hydraulic system through hydraulic oil pipeline.
Embodiment three
The combination type PDC drill bit of the present embodiment, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth is distributed on described long wing, minor diameter PDC being distributed on the described short sword wing and cuts tooth, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix;The sealing cavity being arranged with removable pin it is provided with on described long wing, in annular seal space body is stretched in one end of described removable pin and sealing cavity is divided into spring cavity and movable chamber, being provided with back-moving spring in described spring cavity, described movable chamber connects with outside hydraulic system through hydraulic oil pipeline;Offering flow-guiding channel on described long wing, described hydraulic oil pipeline one end connects with movable chamber, and the other end of described hydraulic oil pipeline connects through flow-guiding channel with outside hydraulic system.
Embodiment four
The combination type PDC drill bit of the present embodiment, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth is distributed on described long wing, minor diameter PDC being distributed on the described short sword wing and cuts tooth, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix;The sealing cavity being arranged with removable pin it is provided with on described long wing, in annular seal space body is stretched in one end of described removable pin and sealing cavity is divided into spring cavity and movable chamber, being provided with back-moving spring in described spring cavity, described movable chamber connects with outside hydraulic system through hydraulic oil pipeline;Offering flow-guiding channel on described long wing, described hydraulic oil pipeline one end connects with movable chamber, and the other end of described hydraulic oil pipeline connects through flow-guiding channel with outside hydraulic system;Offer the pin-and-hole that the axis direction with bit matrix is parallel to each other on described long wing, described bit matrix is provided with the alignment pin being mutually adapted with pin-and-hole.
Embodiment five
The combination type PDC drill bit of the present embodiment, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth is distributed on described long wing, minor diameter PDC being distributed on the described short sword wing and cuts tooth, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix;The sealing cavity being arranged with removable pin it is provided with on described long wing, in annular seal space body is stretched in one end of described removable pin and sealing cavity is divided into spring cavity and movable chamber, being provided with back-moving spring in described spring cavity, described movable chamber connects with outside hydraulic system through hydraulic oil pipeline;Offering flow-guiding channel on described long wing, described hydraulic oil pipeline one end connects with movable chamber, and the other end of described hydraulic oil pipeline connects through flow-guiding channel with outside hydraulic system;Offer the pin-and-hole that the axis direction with bit matrix is parallel to each other on described long wing, described bit matrix is provided with the alignment pin being mutually adapted with pin-and-hole;It is provided with sealing structure between described alignment pin and pin-and-hole, between removable pin and sealing cavity and between piston rod and hydraulic cavities.
Embodiment six
On the basis of any of the above-described embodiment, described major diameter PDC cutting tooth and minor diameter PDC chip tooth in circular cone column.
Embodiment seven
On the basis of embodiment six, described in be embedded on the short sword wing minor diameter PDC cutting increment diameter less than exposed outside the short sword wing minor diameter PDC cutting tooth diameter.
Embodiment eight
On the basis of embodiment six, described in be embedded on long wing major diameter PDC cutting increment diameter less than exposed outside long wing major diameter PDC cutting tooth diameter.

Claims (8)

1. a combination type PDC drill bit, including bit matrix, gauge teeth, long wing and the short sword wing it is provided with on described bit matrix, it is characterized in that, described long wing and the spaced setting of the short sword wing, major diameter PDC cutting tooth being distributed on described long wing, minor diameter PDC is distributed cuts tooth on the described short sword wing, described long wing can move back and forth along the axis direction of bit matrix;The hydraulic cavities being parallel to each other with bit matrix axis direction is offered on described bit matrix, described long wing connects the piston rod that can slide in hydraulic cavities, the periphery of described hydraulic cavities is provided with multiple stopper slot being evenly arranged, connecting the removable pin having can stretch and being mutually adapted with stopper slot on described long wing, described removable pin is mutually perpendicular to the axis direction of bit matrix.
Combination type PDC drill bit the most according to claim 1, it is characterized in that, the sealing cavity being arranged with removable pin it is provided with on described long wing, in annular seal space body is stretched in one end of described removable pin and sealing cavity is divided into spring cavity and movable chamber, being provided with back-moving spring in described spring cavity, described movable chamber connects with outside hydraulic system through hydraulic oil pipeline.
The most according to claim 2, combination type PDC drill bit, it is characterised in that offer flow-guiding channel on described long wing, described hydraulic oil pipeline one end connects with movable chamber, and the other end of described hydraulic oil pipeline connects through flow-guiding channel with outside hydraulic system.
Combination type PDC drill bit the most according to claim 3, it is characterised in that offer the pin-and-hole that the axis direction with bit matrix is parallel to each other on described long wing, described bit matrix is provided with the alignment pin being mutually adapted with pin-and-hole.
Combination type PDC drill bit the most according to claim 4, it is characterised in that be provided with sealing structure between described alignment pin and pin-and-hole, between removable pin and sealing cavity and between piston rod and hydraulic cavities.
Combination type PDC drill bit the most according to claim 1, it is characterised in that described major diameter PDC cutting tooth and minor diameter PDC chip tooth in circular cone column.
Combination type PDC drill bit the most according to claim 6, it is characterised in that described in be embedded on the short sword wing minor diameter PDC cutting increment diameter less than exposed outside the short sword wing minor diameter PDC cutting tooth diameter.
Combination type PDC drill bit the most according to claim 6, it is characterised in that described in be embedded on long wing major diameter PDC cutting increment diameter less than exposed outside long wing major diameter PDC cutting tooth diameter.
CN201620391889.5U 2016-05-04 2016-05-04 Combined PDC bit Active CN205618087U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105756563A (en) * 2016-05-04 2016-07-13 沧州格锐特钻头有限公司 Combined PDC (Polycrystalline Diamond Compact) bit
CN113775296A (en) * 2021-11-11 2021-12-10 胜利油田海胜实业有限责任公司 PDC drill bit with adjustable caliber for marlite exploration
CN113882809A (en) * 2021-12-06 2022-01-04 山东金锐石油装备有限公司 PDC drill bit with telescopic cutting auxiliary tooth assembly and using method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105756563A (en) * 2016-05-04 2016-07-13 沧州格锐特钻头有限公司 Combined PDC (Polycrystalline Diamond Compact) bit
CN105756563B (en) * 2016-05-04 2018-08-31 沧州格锐特钻头有限公司 A kind of combined type PDC drill bit
CN113775296A (en) * 2021-11-11 2021-12-10 胜利油田海胜实业有限责任公司 PDC drill bit with adjustable caliber for marlite exploration
CN113882809A (en) * 2021-12-06 2022-01-04 山东金锐石油装备有限公司 PDC drill bit with telescopic cutting auxiliary tooth assembly and using method
CN113882809B (en) * 2021-12-06 2022-02-08 山东金锐石油装备有限公司 PDC drill bit with telescopic cutting auxiliary tooth assembly and using method

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