CN115450564B - A high-precision anti-torque bent screw steering drilling control system and method - Google Patents

Abstract

The invention relates to a high-precision reverse torque bent screw directional drilling control system and method. The system consists of an electromagnetic valve bank A, CPU-A, a pressure sensor A, a wireless electromagnetic wave communication device A, an electromagnetic valve bank B, CPU-B, a pressure sensor B, a wireless electromagnetic wave communication device B, a reverse torque bent screw guide drilling tool and a wireless inclinometer. The method comprises the following steps: s1: a ground emission orientation tool face angle A; s2: CPU-B stores orientation toolface angle A; s3: the CPU-B distributes clutch frequencies N1 and N2 for the clutch module A and the clutch module B according to the angle difference delta alpha and the change rate of the angle difference delta alpha of the real-time tool face angle B and the directional tool face angle A; s4: the CPU-A and the CPU-B control the on-off frequency of the electromagnetic valve group A and the electromagnetic valve group B, and further control the separation and combination of the clutch module A and the clutch module B. Compared with the prior art, the method has the following advantages: the tool face angle control precision is high, and the rotating speed range of the drill rod is large.

Description

A high-precision anti-torque bent screw steering drilling control system and method

Technical Field

The invention relates to the field of oil and gas drilling engineering, and in particular to a high-precision anti-torque bent screw guide drilling control system and method.

Background technique

Horizontal well technology is the main technology for developing deep and unconventional oil and gas resources. Horizontal well drilling requires wellbore trajectory guidance control. Currently, horizontal well guidance drilling includes two types: rotary guidance and bent screw sliding guidance. Rotary guidance technology relies on imports. The 32nd National Natural Gas Academic Annual Conference in 2020 listed the rotary guidance system as a typical "bottleneck" technology.

Drill string rotation is one of the most effective means to solve the "support pressure" problem. For example, the drill string torsion system based on the reciprocating rotation of the drill string can increase the speed by more than 30%, but this system cannot be applied to deep wells, and the speed increase is limited for wells deeper than 3000m. HydroClutch, a Canadian company, has developed a twin-screw clutch. One screw in the tool provides rock-breaking torque for the drill bit, and the other screw resists the counter-torque transmitted to the drill pipe by the drill bit breaking the rock. However, the pressure consumption of the tool is 5-10MPa higher than that of the conventional drill bit combination, which cannot meet the requirements of the on-site working conditions, and the tool face cannot be accurately controlled. There has been no engineering application test. Sichuan Qing Drilling and other domestic companies have carried out research on isolated drill string rotation technology, realizing the functions of "separation" and "engagement" of the drill string. However, there are still problems such as uncontrollable tool faces and excessive length of the lower static drill bit (more than 700 meters). The curved screw sliding guide still has three major technical bottlenecks: difficulty in controlling the wellbore trajectory, low drilling rate and pure drilling time, and high risk of stuck drill.

Patents CN201910386427.2, US9109402B1, etc. invented a twin-screw directional structure, in which one screw is used to break rocks and the other is used to resist the reverse torque. This solution has high pressure consumption, limited performance of ground mud pumps, and has not been applied. It is also a purely mechanical directional structure, and tool face control is extremely difficult. Patents CN201710028105.1, US5458208, CN2651413Y, CN105525875A, etc. invented clutch mechanisms, but these clutch mechanisms perform clutch operations with a large rotation angle of more than 30°, and the tool face control accuracy is low. Due to the limitation of mechanical performance, the clutch time is long, the drill pipe speed is low, and it is difficult to adapt to high speed requirements.

Summary of the invention

In order to overcome the shortcomings of the prior art, a high-precision anti-torque bent screw steering drilling control system and method are invented, which comprises a solenoid valve group A (4013), a CPU-A (4014), a pressure sensor A (4015), a wireless electromagnetic wave communication device A (4016), a solenoid valve group B (4023), a CPU-B (4024), a pressure sensor B (4025), a wireless electromagnetic wave communication device B (4026), an anti-torque bent screw steering drilling tool (4) and a wireless measurement while drilling system. The inclinometer (3) is composed of the electromagnetic valve group A (4013), the pressure sensor A (4015) and the wireless electromagnetic wave communication device A (4016) which are all connected to the CPU-A (4014); the electromagnetic valve group B (4023), the pressure sensor B (4025) and the wireless electromagnetic wave communication device B (4026) which are all connected to the CPU-B (4024); the lower ends of the anti-torque bent screw steering drilling tool (4) and the wireless inclinometer (3) are connected in sequence to the bent screw drilling tool ( 2) and a drill bit (1); the liquid port of the solenoid valve group A (4013) is connected to the hydraulic chamber A (4011) and the hydraulic chamber B (4012); the liquid port of the solenoid valve group B (4023) is connected to the hydraulic chamber C (4021) and the hydraulic chamber D (4022); the pressure sensor A (4015) and the pressure sensor B (4025) are both connected to the anti-torque bent screw guide drilling tool (4); the pressure sensor A (4015) and the pressure sensor B (4025) are used to connect Receive mud pulse signals; the anti-torque bent screw guide drilling tool (4) is composed of a clutch module A (401) and a clutch module B (402); the clutch module A (401) is connected to a measurement and control system A (4017); the clutch module B (402) is connected to a measurement and control system B (4027); the measurement and control system B (4027) is connected to a wireless while-drilling inclinometer (3) for wired communication, and the measurement and control system B (4027) obtains the real-time tool face angle B of the wireless while-drilling inclinometer (3) in real time.

The anti-torque bent screw guide drilling tool (4) is composed of 2 to 4 clutch modules [clutch module A (401), clutch module B (402)].

The solenoid valve group A (4013) and the solenoid valve group B (4023) are both composed of 1 to 4 two-position four-way solenoid reversing cartridge valves.

The high-precision anti-torque bent screw directional drilling control method is composed of the following steps:

S1: the directional tool face angle A is transmitted from the ground, and the pressure sensor B (4025) receives the directional tool face angle A;

S2: CPU-B (4024) stores the directional tool face angle A, and receives the real-time tool face angle B monitored by the wireless while drilling inclinometer (3) in real time;

S3: CPU-B (4024) allocates clutch frequencies N1 and N2 to clutch module A (402) and clutch module B (401) according to the angle difference Δα between the real-time tool face angle B and the directional tool face angle A and the rate of change of the angle difference Δα;

S4: CPU-A (4014) controls the on/off of electromagnetic valve group A (4013) according to the clutch frequency N1, thereby controlling the high-pressure mud and the low-pressure mud to alternately enter the hydraulic chamber A (4011) and the hydraulic chamber B (4012), thereby controlling the clutch module A (401). Similarly, CPU-B (4024) controls the on/off of electromagnetic valve group B (4023) according to the clutch frequency N2, thereby controlling the high-pressure mud and the low-pressure mud to alternately enter the hydraulic chamber C (4021) and the hydraulic chamber D (4022), thereby controlling the clutch module B (402).

In S3, if the rotation speed of the drill rod (5) R<30r/min, then N1=0, N2=R*360/60/n2, wherein n2 is the angle adjusted by the clutch module B (402) for one clutch or one clutch; if the rotation speed of the drill rod (5) R>30r/min, then N1=30*360/60/n1, wherein n1 is the angle adjusted by the clutch module A (401) for one clutch or one clutch; N2=(R-30)*360/60/n2.

In S4, the clutch frequency N1 is transmitted from the CPU-B (4024) to the wireless electromagnetic wave communication device A (4016) via the wireless electromagnetic wave communication device B (4026), the CPU-A (4014) receives the clutch frequency N1 received by the wireless electromagnetic wave communication device A (4016), and the CPU-A (4014) controls the clutch module A (401) to clutch and engage according to the clutch frequency N1.

In S4, the solenoid valve group A (4013) and the solenoid valve group B (4023) are respectively composed of 1 to 4 solenoid valves, and each solenoid valve is turned on and off at an interval of 10 to 50 ms to reduce the instantaneous current of the system, avoid current overload of the circuit system, and thus protect the circuit.

The clutch module A (401) is clutched once to adjust the angle to 25°, and the clutch module B (402) is clutched once to adjust the angle to 30°. If the angle difference between the real-time tool face angle B and the directional tool face angle A is Δα or the same angle difference Δα', the clutch module A (401) and the clutch module B (402) are allocated with the clutch times as shown in Table 1:

Table 1

The clutch module A (401) and the clutch module B (402) can control the angular difference error within 5° according to the clutch times shown in Table 1.

Compared with the prior art, the present invention has the following advantages:

(1) High tool face angle control accuracy. The tool face angle control accuracy of similar tools is 20° to 30°, while the tool face angle control accuracy of the present invention can be controlled within 5°, which is far superior to similar tools.

(2) The drill rod speed range is large. Similar tools allow the drill rod speed to be 0-30r/min. The present invention adopts a dual clutch module, which allows the drill rod speed range to reach 0-60r/min, doubling the drill rod speed range.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of a high-precision anti-torque bent screw steering drilling control system.

FIG. 2 is a schematic diagram of the steerable drilling control system of a high-precision anti-torque bent screw steerable drilling system.

FIG3 is a flow chart of a high-precision anti-torque bent screw steering drilling control method.

In the figure: 1-drill bit, 2-bent screw drilling tool, 3-inclinometer while drilling, 4-high-precision anti-torque bent screw directional drilling tool, 5-drill pipe, 401-clutch module A, 402-clutch module B, 4011-hydraulic chamber A, 4012-hydraulic chamber B, 4013-solenoid valve group A, 4014-CPU-A, 4015-pressure sensor A, 4016-radio electromagnetic wave communication device A, 4017-measurement and control system A, 4021-hydraulic chamber C, 4022-hydraulic chamber D, 4023-solenoid valve group B, 4024-CPU-B, 4025-pressure sensor B, 4026-radio electromagnetic wave communication device B, 4027-measurement and control system B.

Detailed ways

In order to have a clearer understanding of the technical features, objectives and effects of the present invention, specific embodiments of the present invention are now described in conjunction with the accompanying drawings.

As shown in FIGS. 1 to 3, the present embodiment provides a high-precision anti-torque bent screw steering drilling control system and method, which comprises a solenoid valve group A (4013), a CPU-A (4014), a pressure sensor A (4015), a wireless electromagnetic wave communication device A (4016), a solenoid valve group B (4023), a CPU-B (4024), a pressure sensor B (4025), a wireless electromagnetic wave communication device B (4026), an anti-torque bent screw steering drilling tool (4) and a wireless measurement while drilling device. The inclinometer (3) is composed of the electromagnetic valve group A (4013), the pressure sensor A (4015) and the wireless electromagnetic wave communication device A (4016) which are all connected to the CPU-A (4014); the electromagnetic valve group B (4023), the pressure sensor B (4025) and the wireless electromagnetic wave communication device B (4026) which are all connected to the CPU-B (4024); the lower ends of the anti-torque bent screw steering drilling tool (4) and the wireless inclinometer (3) are connected in sequence to the bent screw drilling tool ( 2) and a drill bit (1); the liquid port of the solenoid valve group A (4013) is connected to the hydraulic chamber A (4011) and the hydraulic chamber B (4012); the liquid port of the solenoid valve group B (4023) is connected to the hydraulic chamber C (4021) and the hydraulic chamber D (4022); the pressure sensor A (4015) and the pressure sensor B (4025) are both connected to the anti-torque bent screw guide drilling tool (4); the pressure sensor A (4015) and the pressure sensor B (4025) are used to connect Receive mud pulse signals; the anti-torque bent screw guide drilling tool (4) is composed of a clutch module A (401) and a clutch module B (402); the clutch module A (401) is connected to a measurement and control system A (4017); the clutch module B (402) is connected to a measurement and control system B (4027); the measurement and control system B (4027) is connected to a wireless while-drilling inclinometer (3) for wired communication, and the measurement and control system B (4027) obtains the real-time tool face angle B of the wireless while-drilling inclinometer (3) in real time.

Example:

Step 1: The directional tool face angle A is transmitted from the ground, and the pressure sensor B (4025) receives the directional tool face angle A;

Step 2: CPU-B (4024) stores the directional tool face angle A, and receives the real-time tool face angle B monitored by the wireless drilling inclinometer (3) in real time;

Step 3: CPU-B (4024) allocates clutch frequencies N1 and N2 to clutch module A (402) and clutch module B (401) according to the angle difference Δα between the real-time tool face angle B and the directional tool face angle A and the rate of change of the angle difference Δα;

Step 4: CPU-A (4014) controls the electromagnetic valve group A (4013) to turn on and off according to the clutch frequency N1, thereby controlling the high-pressure mud and the low-pressure mud to alternately enter the hydraulic chamber A (4011) and the hydraulic chamber B (4012), thereby controlling the clutch module A (401). Similarly, CPU-B (4024) controls the electromagnetic valve group B (4023) to turn on and off according to the clutch frequency N2, thereby controlling the high-pressure mud and the low-pressure mud to alternately enter the hydraulic chamber C (4021) and the hydraulic chamber D (4022), thereby controlling the clutch module B (402); if the angle difference between the real-time tool face angle B and the directional tool face angle A is Δα, the distribution of the clutch times of the clutch module A (401) and the clutch module B (402) is selected according to the data shown in Table 1 in the content of the invention.

The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by a person skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention.

Claims (5)

1. A high-precision anti-torque bent screw directional drilling control system, characterized in that: the high-precision anti-torque bent screw directional drilling control system comprises a solenoid valve group A (4013), a CPU-A (4014), a pressure sensor A (4015), a wireless electromagnetic wave communication device A (4016), a solenoid valve group B (4023), a CPU-B (4024), a pressure sensor B (4025), a wireless electromagnetic wave communication device B (4026), an anti-torque bent screw guide drilling tool (4) and a wireless drilling inclinometer (3); The solenoid valve group A (4013), the pressure sensor A (4015) and the wireless electromagnetic wave communication device A (4016) are all connected to the CPU-A (4014); the solenoid valve group B (4023), the pressure sensor B (4025) and the wireless electromagnetic wave communication device B (4026) are all connected to the CPU-B (4024); the lower ends of the anti-torque bent screw guide drilling tool (4) and the wireless drilling inclinometer (3) are connected to the bent screw drilling tool (2) and the drill bit (1 ); the liquid port of the solenoid valve group A (4013) is connected to the hydraulic chamber A (4011) and the hydraulic chamber B (4012); the liquid port of the solenoid valve group B (4023) is connected to the hydraulic chamber C (4021) and the hydraulic chamber D (4022); the pressure sensor A (4015) and the pressure sensor B (4025) are both connected to the anti-torque bent screw guide drilling tool (4); the pressure sensor A (4015) and the pressure sensor B (4025) are used to receive mud pulse signals; The anti-torque bent screw guide drilling tool (4) is composed of a clutch module A (401) and a clutch module B (402); the clutch module A (401) is connected to a measurement and control system A (4017); the clutch module B (402) is connected to a measurement and control system B (4027); the measurement and control system B (4027) is connected to a wireless while-drilling inclinometer (3) for wired communication, and the measurement and control system B (4027) obtains a real-time tool face angle B of the wireless while-drilling inclinometer (3) in real time. 2. A control method using the high-precision anti-torque bent screw directional drilling control system as claimed in claim 1, characterized in that it is composed of the following steps: S1: the directional tool face angle A is transmitted from the ground, and the pressure sensor B (4025) receives the directional tool face angle A; S2: CPU-B (4024) stores the directional tool face angle A, and receives the real-time tool face angle B monitored by the wireless while drilling inclinometer (3) in real time; S3: CPU-B (4024) allocates clutch frequencies N1 and N2 to clutch module A (402) and clutch module B (401) according to the angle difference Δα between the real-time tool face angle B and the directional tool face angle A and the rate of change of the angle difference Δα; S4: CPU-A (4014) controls the on and off of the electromagnetic valve group A (4013) according to the clutch frequency N1, thereby controlling the high-pressure mud and the low-pressure mud to alternately enter the hydraulic chamber A (4011) and the hydraulic chamber B (4012), thereby controlling the clutch module A (401); similarly, CPU-B (4024) controls the on and off of the electromagnetic valve group B (4023) according to the clutch frequency N2, thereby controlling the high-pressure mud and the low-pressure mud to alternately enter the hydraulic chamber C (4021) and the hydraulic chamber D (4022), thereby controlling the clutch module B (402). The clutch module A (401) clutches once to adjust the angle of 25°, and the clutch module B (402) clutches once to adjust the angle of 30°. The clutch module A (401) and the clutch module B (402) can control the angular difference error within 5°. 3. A high-precision anti-torque bent screw guided drilling control method according to claim 2, characterized in that: in S3, if the drill pipe (5) rotation speed R<30r/min, then N1=0, N2=R*360/60/n2, where n2 is the angle adjusted by the clutch module B (402) for one clutch or one clutch; if the drill pipe (5) rotation speed R>30r/min, then N1=30*360/60/n1, where n1 is the angle adjusted by the clutch module A (401) for one clutch or one clutch; N2=(R-30)*360/60/n2. 4. A high-precision anti-torque bent screw directional drilling control method according to claim 3, characterized in that: in S4, the clutch frequency N1 is transmitted from the CPU-B (4024) to the wireless electromagnetic wave communication device A (4016) through the wireless electromagnetic wave communication device B (4026), the CPU-A (4014) receives the clutch frequency N1 received by the wireless electromagnetic wave communication device A (4016), and the CPU-A (4014) controls the clutch module A (401) to clutch and engage according to the clutch frequency N1. 5. A high-precision anti-torque bent screw directional drilling control method according to claim 3, characterized in that: in S4, the solenoid valve group A (4013) and the solenoid valve group B (4023) are respectively composed of 1 to 4 solenoid valves, and each solenoid valve is turned on and off at an interval of 10 to 50 ms to reduce the system's instantaneous overload current, avoid circuit system current overload, and thereby protect the circuit from being burned out by overload current.