Drill bit, drill bit monitoring system and drill bit torque monitoring method

Abstract

The embodiments of the invention disclose a drill bit, a drill bit monitoring system and a drill bit torque monitoring method, and relates to the technical field of drilling equipment. According to the key points of a drill bit technical scheme, a joint, a drill bit body and a torque adjusting assembly are included. The joint is used for connecting a drill string, and the joint is connected with the drill bit body through the torque adjusting assembly; the drill bit body is fixedly provided with a polycrystalline diamond compact drill bit; and the torque adjusting assembly includes a shell, adisc spring, a connecting shaft, a first friction plate, a first rigid body, a second friction plate and a second rigid body, so that the effects that the impact damage to diamond composite diamond compact teeth is effectively prevented, the service range of the PDC drill bit is greatly expanded, the service life of the PDC drill bit is greatly prolonged, and the monitoring of the torque and a working state of the PDC drill bit is convenient are achieved .

Description

technical field

[0001] The embodiments of the present invention relate to the technical field of drilling equipment, and in particular to a drill bit, a system for monitoring the drill bit, and a method for monitoring the torque of the drill bit. Background technique

[0002] Polycrystalline diamond compact drill bit (PDC bit), as an efficient tool for breaking rock, has been widely used in oil and rock drilling, and has played a huge role in increasing the speed and efficiency of drilling. However, due to the high hardness, strong brittleness and poor impact resistance of the cutting element of the PDC drill bit, the diamond composite sheet is not effective in high hardness and heterogeneous formations such as igneous rocks and gravel layers. The reason is that the drilling torque Excessive impact causes early damage to the diamond compact. Therefore, there is an urgent need for a torque-controllable PDC drill bit to improve its application range and service life. Conten...

Examples

Embodiment 1

[0036] a drill such as figure 1 As shown, it includes a joint 6, a drill body 1 and a torque adjustment assembly, wherein the joint 6 is used to connect the drill string and is connected to the drill body 1 through the torque adjustment assembly, and the joint 6 is used to transmit the torque provided by the drill string to the drill body 1 connection to the torque adjustment assembly.

[0037] A polycrystalline diamond composite drill bit 111 is fixedly arranged on the drill bit body 1. The polycrystalline diamond composite drill bit 111 is arranged on the side of the drill bit body 1 away from the torque adjustment assembly. When the drill bit body 1 rotates, the drilling process can be realized. The drill bit 111 is welded and fixed with the drill bit body 1 .

[0038] The torque adjustment assembly includes a housing 2, a disc spring 3, a connecting shaft 5, a first friction plate 8, a first rigid body 9, a second friction plate 81, and a second rigid body 91, wherein the...

Embodiment 2

[0046] combine figure 1 and figure 2 , this embodiment provides a drill bit monitoring system, the system includes the drill bit provided in the first embodiment and a ground control device, the ground control device is used to monitor the frequency of pump pressure fluctuations for supplying drilling fluid to the drill bit.

[0047] The ground monitoring device includes a pressure sensor 101, an A / D converter 102, an industrial computer 103, a display 104, a recorder 105 and an alarm 106, the pressure sensor 101 is used to collect pump pressure signals, and the pressure sensor 101 and the A / D converter 102 The input end of the A / D converter 102 converts the analog signal into a digital signal, and the output end of the A / D converter 102 is connected with the industrial computer 103, so that the digital signal is transmitted to the industrial computer 103, and the industrial computer 103 is connected with the industrial computer 103 respectively. The display 104, the recorde...

Embodiment 3

[0049] This embodiment provides a drill bit torque monitoring method of the drill bit monitorable system described in Embodiment 2, including the following steps:

[0050] Step 1. During normal drilling, the joint 6, the drill bit body 1 and the torque adjustment assembly rotate synchronously with the drill string;

[0051] Step 2. The pressure sensor 101 collects the numerical value of the drilling fluid pump pressure and the analog signal of the fluctuation frequency and transmits the analog signal to the A / D converter 102. The A / D converter 102 converts the analog signal into a digital signal and then inputs it into the industrial computer 103 ;

[0052] Step 3, the industrial computer 103 processes the input digital signal and stores it in the industrial computer 103, displays it on the display 104 and saves it by the recorder 105;

[0053] Step 4, the industrial computer 103 judges whether the fluctuation frequency of the drilling fluid pump pressure reaches or exceeds a...

technical field

[0001] The embodiments of the present invention relate to the technical field of drilling equipment, and in particular to a drill bit, a system for monitoring the drill bit, and a method for monitoring the torque of the drill bit. Background technique

[0002] Polycrystalline diamond compact drill bit (PDC bit), as an efficient tool for breaking rock, has been widely used in oil and rock drilling, and has played a huge role in increasing the speed and efficiency of drilling. However, due to the high hardness, strong brittleness and poor impact resistance of the cutting element of the PDC drill bit, the diamond composite sheet is not effective in high hardness and heterogeneous formations such as igneous rocks and gravel layers. The reason is that the drilling torque Excessive impact causes early damage to the diamond compact. Therefore, there is an urgent need for a torque-controllable PDC drill bit to improve its application range and service life. Conten...

Examples

Embodiment 1

[0036] a drill such as figure 1 As shown, it includes a joint 6, a drill body 1 and a torque adjustment assembly, wherein the joint 6 is used to connect the drill string and is connected to the drill body 1 through the torque adjustment assembly, and the joint 6 is used to transmit the torque provided by the drill string to the drill body 1 connection to the torque adjustment assembly.

[0037] A polycrystalline diamond composite drill bit 111 is fixedly arranged on the drill bit body 1. The polycrystalline diamond composite drill bit 111 is arranged on the side of the drill bit body 1 away from the torque adjustment assembly. When the drill bit body 1 rotates, the drilling process can be realized. The drill bit 111 is welded and fixed with the drill bit body 1 .

[0038] The torque adjustment assembly includes a housing 2, a disc spring 3, a connecting shaft 5, a first friction plate 8, a first rigid body 9, a second friction plate 81, and a second rigid body 91, wherein the...

Embodiment 2

[0046] combine figure 1 and figure 2 , this embodiment provides a drill bit monitoring system, the system includes the drill bit provided in the first embodiment and a ground control device, the ground control device is used to monitor the frequency of pump pressure fluctuations for supplying drilling fluid to the drill bit.

[0047] The ground monitoring device includes a pressure sensor 101, an A / D converter 102, an industrial computer 103, a display 104, a recorder 105 and an alarm 106, the pressure sensor 101 is used to collect pump pressure signals, and the pressure sensor 101 and the A / D converter 102 The input end of the A / D converter 102 converts the analog signal into a digital signal, and the output end of the A / D converter 102 is connected with the industrial computer 103, so that the digital signal is transmitted to the industrial computer 103, and the industrial computer 103 is connected with the industrial computer 103 respectively. The display 104, the recorde...

Embodiment 3

[0049] This embodiment provides a drill bit torque monitoring method of the drill bit monitorable system described in Embodiment 2, including the following steps:

[0050] Step 1. During normal drilling, the joint 6, the drill bit body 1 and the torque adjustment assembly rotate synchronously with the drill string;

[0051] Step 2. The pressure sensor 101 collects the numerical value of the drilling fluid pump pressure and the analog signal of the fluctuation frequency and transmits the analog signal to the A / D converter 102. The A / D converter 102 converts the analog signal into a digital signal and then inputs it into the industrial computer 103 ;

[0052] Step 3, the industrial computer 103 processes the input digital signal and stores it in the industrial computer 103, displays it on the display 104 and saves it by the recorder 105;

[0053] Step 4, the industrial computer 103 judges whether the fluctuation frequency of the drilling fluid pump pressure reaches or exceeds a...

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