CN204041059U - Rotating disk demarcated by a kind of inclinometer for vertical drilling electronics joint - Google Patents

Abstract

The utility model relates to an inclinometer calibration turntable used for vertical drilling electronic joints, comprising a thrust bearing, a rotating disk, a bias disk, a fixed disk and a base, wherein the rotation disk is located on the top of the inclinometer calibration turntable, biased The disc is located under the rotating disc, and the thrust bearing is located between the rotating disc and the offset disc. There is a threaded hole on one side of the offset disc, and an offset screw is arranged in the threaded hole, and the offset screw passes through the offset vertically. One side edge of the disc, so that the bias angle of the bias disc can be adjusted by loosening and tightening the bias screw. The calibration turntable is used for calibration and correction of the axial non-parallelism between the inclinometer of the drilling tool and the vertical drilling electronic section, and can greatly improve the accuracy of the inclinometer in measuring the well inclination and the high-side tool face angle.

Description

An inclinometer calibration turntable for vertical drilling electronic section

technical field

The utility model relates to a calibration device, in particular to a calibration turntable of an inclinometer used for oil and gas drilling electronic joints.

Background technique

In order to complete the drilling quickly and also for drilling safety, the vertical well drilling process usually requires strict control of the well deviation within a certain range, especially in the formation and deep wells with complex geological environments, where wellbore deviation often occurs; rotary steerable drilling The process needs to make parameters such as well deviation change according to the operation instructions. In the case of complex formations, parameters such as well deviation can easily deviate from the instructions. At present, vertical drilling tools and rotary steerable drilling tools have become important research topics in the oil and gas drilling industry. It is especially important to accurately measure the well deviation and high-side tool face angle during the drilling process, and to correct the drilling tools at any time.

Among them, the inclinometer is used to measure the inclination angle of the downhole tool in real time while drilling, that is, the inclination angle, the high-side tool face angle and other parameters, and provides a basis for real-time understanding and control of the drilling status of the downhole drilling tool. The inclinometer requires three acceleration sensors to be installed on two orthogonal axes respectively, and the three acceleration sensors measure the gravity components of the earth on the three axes respectively. The gravitational components of the gravitational acceleration g on the three acceleration sensors are g _x , g _y , and g _z respectively.

The inclination angle measured by the inclinometer refers to the angle between the borehole centerline and the vertical line. The inclination angle in the vertical direction is 0°, and the inclination angle in the horizontal direction is 90°, as shown in Fig. 3. In the triangle in the vertical plane, the inclination angle (INC) is the angle from the vertical line to the Z axis (axis of the angular velocity meter), and the inclination angle can be obtained by the following formula:

$\mathrm{the\; tan}a=\frac{\sqrt{g_x^2+g_{\mathrm{the\; y}}^2}}{g_z}$ so $a=\mathrm{arctg}\left(\frac{\sqrt{g_x^2+g_{\mathrm{the\; y}}^2}}{g_z}\right)$

Then the well inclination angle is:

1) When g _z >0, INC=a;

2) When g _z <0, INC=180+a;

3) When _gz = 0, INC = 90;

The high-side tool-face angle measured by the inclinometer is also called the gravity tool-face angle, which is the angle at which the inclined mouth of the instrument rotates clockwise relative to the high-side of the wellbore in the direction of the borehole, that is, the high-side and the Z-axis determined by the gravity vector The included angle between (accelerometer axes) is a quantity in the traveling direction of the positioning drilling tool in directional drilling, as shown in Fig. 4 . The high side tool face angle can be obtained by the following formula:

$\mathrm{the\; tan}{\mathrm{\&theta;}}_g=\frac{g_x}{g_{\mathrm{the\; y}}}$ so ${\mathrm{\&theta;}}_g=\mathrm{arctg}\left(\frac{g_x}{g_{\mathrm{the\; y}}}\right)$

Then the high side tool face angle GTF has:

1) When g _x ≤0, g _y >0, GTF＝θ _g

2) When g _y <0, GTF=θ _g +180

3) when $g_{\mathrm{the\; y}}=0,\left\{\begin{array}{cc}{g}_x\&le;0& \mathrm{GTF}=90\\ g_x>0& \mathrm{GTF}=270\end{array}\right.$

When g _y >0, g _x >0, GTF＝θ _g +360

When the drilling tool is working downhole, in order to control the drilling state of the drilling tool in real time, it is necessary to accurately measure the well deviation and the high-side tool face angle in real time, so as to correct the drilling state of the drilling tool in real time. The section installed on the tool while drilling is generally circular. However, it is difficult to ensure that the inclinometer is strictly parallel to the axis of the electronic section when the inclinometer is installed on the electronic section. Edge tool face angles pose difficulties.

The axial non-parallel between the inclinometer and the electronic section refers to the incomplete coincidence of the inclinometer coordinate system and the electronic section coordinate system. In an ideal situation, the coordinate system XYZ of the inclinometer coincides completely with the coordinate system EVN of the electronic section, as shown in Figure 5. At this time, there is no axis non-parallel. Ensure that the coordinate system XYZ of the inclinometer coincides completely with the coordinate system EVN of the electronic section, and the angle ε between the X-axis and the E-axis, the angle β between the Y-axis and the N-axis, and the angle α between the Z-axis and the V-axis appear, as shown in Figure 6 shown. If it is not corrected, the inclination angle and high-side tool-face angle of the inclinometer obtained at this time are not the well-inclination angle and high-side tool-face angle of the drilling tool, so it is difficult to accurately obtain the drilling state and precisely control the drilling .

Utility model content

In order to solve the above-mentioned technical problems, the utility model provides an inclinometer calibration turntable for vertical drilling electronic joints.

The utility model relates to an inclinometer calibration turntable for vertical drilling electronic joints, including a thrust bearing, a rotating disk, a bias disk, a fixed disk and a base, wherein the rotation disk is located on the top of the inclinometer calibration turntable, and the bias disk Located under the rotating disk, the thrust bearing is located between the rotating disk and the offset disk, and a threaded hole is provided on one side of the offset disk, and an offset screw is arranged in the threaded hole, and the offset screw passes through the offset disk vertically One side of the edge, so that the offset angle of the offset disc can be adjusted by loosening and tightening the offset screw.

Preferably, the upper and lower surfaces of the rotating disk are provided with bosses, wherein a first upper boss is arranged on its upper surface, a first lower boss is arranged on its lower surface, the first upper boss and The geometric center of the first lower boss coincides with the geometric center of the rotating disk, and the second upper boss is arranged on the upper surface of the offset disk.

Preferably, the rotating disk and the biasing disk are connected together through a thrust bearing, wherein the upper and lower sides of the thrust bearing are respectively engaged with the first lower boss of the rotating disk and the second upper boss of the biasing disk, thereby ensuring rotation The disc is free to rotate about its central axis.

Preferably, a pin hole is provided on one side of the offset disc, and the offset disc can be connected with the connecting bracket through the pin in the pin hole, so as to ensure that the offset disc can rotate around the pin shaft, and the threaded hole On the same diameter as the pin hole.

Preferably, the fixed disc is located below the offset disc, and one side thereof is provided with a notch, the notch is located at the position of the pin shaft hole, and the connecting bracket passes through the notch and is connected with the fixed disc by four screws, so that the fixed disc can be connected with the fixed disc. Rotating discs are connected by one end

Preferably, grooves are provided on the lower surface of the fixed plate.

Preferably, the base is located at the bottom of the inclinometer calibration turntable, and its upper surface is provided with a third upper boss, the third upper boss matches the groove of the fixed plate, and the height of the third upper boss is greater than that of the groove The depth is such that the groove on the lower surface of the fixed plate and the third upper boss on the upper surface of the base are closely engaged with each other, thereby ensuring the stable operation of the inclinometer calibration turntable.

Preferably, the rotating disk, the biasing disk, the fixed disk and the base are circular.

Preferably, the diameter of the base is at least one-third larger than the diameter of the fixed plate.

The utility model also provides a calibration method using the calibration turntable in any one of the above technical solutions, which includes the following steps:

(1) First install the inclinometer on the vertical drilling electronic section, and then place the vertical drilling electronic section on the rotating disk of the inclinometer calibration turntable, wherein the center hole of the vertical drilling electronic section is connected to the first hole on the upper surface of the rotating disk The upper boss is tightly engaged, and ensures that the center of the vertical drilling electronic section and the center of the rotating disk are in a straight line;

(2) Turn the offset screw to rotate the offset coil around the pin shaft at a certain angle, so that there is a certain angle between the offset disc and the fixed disc;

(3) Make the rotating coil rotate around its center, so as to drive the vertical drilling electronic joint to rotate around its center. When the vertical drilling electronic joint rotates at a certain angle, record the inclination After one revolution, calculate the translation and rotation coefficients required to make the coordinate system of the inclinometer coincide with the coordinate system of the electronic section according to the obtained inclination angle and high side tool face angle, and then calculate the inclination angle and The high-side tool angle is unified to the electronic node coordinate system, so as to obtain the actual inclination angle and high-side tool face angle of the drilling tool.

After the inclinometer is installed on the electronic section, if it is not calibrated by the inclinometer calibration turntable, the measurement error is about 0.6°. After the inclinometer calibration turntable is calibrated, the measurement error is less than 0.04°. Inclinometer measurement accuracy is greatly improved.

The inclinometer calibration turntable used for the vertical drilling electronic section related to the utility model is mainly used for calibration and correction of the axial non-parallelism between the drilling tool inclinometer and the vertical drilling electronic section, which can greatly improve the inclination and height measured by the inclinometer. The accuracy of the face angle of the side tool, among which, the calibration turntable involved is compact and simple in structure, making full use of the snap-fit connection method, easy to disassemble and assemble, and high in reliability; The connection is simple, stable and reliable, easy to disassemble and assemble, and at the same time facilitates the rotation of the offset plate; the offset plate adjusts the offset angle and offset accuracy by adjusting the offset screw, and the method is simple and easy to operate.

Description of drawings

Fig. 1 is a structural diagram of an inclinometer calibration turntable for a vertical drilling electronic section related to the utility model;

Fig. 2 is a cross-sectional view of the inclinometer calibration turntable used for the vertical drilling electronic section related to the utility model.

Fig. 3 is the schematic diagram that the inclinometer measurement that the present invention relates to;

Fig. 4 is the schematic diagram that the inclinometer measurement that the present invention relates to;

Fig. 5 is the schematic diagram that the inclinometer measurement that the present invention relates to;

Fig. 6 is a schematic diagram of inclinometer measurement involved in the present invention.

Among them, 1-thrust bearing, 2-rotating disk, 3-biasing disk, 4-fixed disk, 5-base, 6-pin shaft, 7-connecting bracket, 8-biasing screw.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, this embodiment provides an inclinometer calibration turntable for vertical drilling electronic joints, which includes a thrust bearing 1, a rotating disk 2, an offset disk 3, a fixed disk 4 and a base 5, Wherein, the rotating disk 2 is located on the top of the inclinometer calibration turntable, and its upper and lower surfaces are provided with bosses, wherein the upper surface is provided with a first upper boss, and its lower surface is provided with a first lower boss, The geometric center of the first upper boss and the first lower boss coincides with the geometric center of the rotary disk 2, when the vertical drilling electronic section is placed on the rotary disk 2, the central axis of the electronic section passes through the geometric center of the rotary disk 2 , which can ensure that the vertical drilling electronic section rotates according to its own geometric central axis. In addition, the height of the first upper boss and the first lower boss is preferably 10mm, and the diameter of the first upper boss can be determined according to the central hole of the vertical drilling electronic section. The diameter of the hole is determined to ensure that the center hole of the vertical drilling electronic section is tightly engaged with the first upper boss;

The offset disk 3 is located below the rotating disk 2, and a second upper boss is provided on its upper surface; the thrust bearing 1 is located between the rotating disk 2 and the offset disk 3, and the rotating disk 2 and the offset disk 3 pass through the thrust bearing 1 They are connected together, wherein the upper and lower sides of the thrust bearing 1 are respectively engaged with the first lower boss of the rotary disk 2 and the second upper boss of the bias disk 3 through the protrusions at both ends of the thrust bearing 1, so as to ensure that the rotary disk 2 It can freely rotate around its central axis, wherein the diameters of the first lower boss and the second upper boss can be determined according to the inner diameter of the thrust bearing 1, so as to ensure that the upper edge and the lower edge of the thrust bearing 1 can be closely connected with the rotation respectively The first lower boss of the disc 2 is engaged with the second upper boss of the offset disc 3; wherein, a pin hole is provided on one side of the bias disc 3, and the bias disc 3 can pass through the pin hole. The pin shaft 6 is connected with the connecting bracket 7 to ensure that the offset disc 3 can rotate around the pin shaft 6; a threaded hole is provided on the other side of the offset disc 3, and the threaded hole is in the same diameter direction as the pin shaft hole , and the threaded hole is of M5 specification, and a bias screw 8 is arranged in the threaded hole, and the bias screw 8 vertically passes through the other side edge of the bias plate 3, wherein the bias screw 8 can be tightened to adjust the bias Set the bias angle of the disc 3, specifically, when the bias screw 8 is tightened, the bias angle of the bias disc 3 can be adjusted by rotating the bias disc 3 around the pin shaft 6 at a certain angle; the fixed disc 4 is located at the bias position Below the disk 3, there is a gap on one side, which is located at the position of the pin shaft hole. The connecting bracket 7 passes through the gap and connects with the fixed disk 4 through four screws, so that the fixed disk 4 and the rotating disk 3 can pass through one end. connection; in addition, a groove is provided on the lower surface of the fixed plate 4, and the depth of the groove is preferably 10mm; the base 5 is located at the bottom of the inclinometer calibration turntable, and its upper surface is provided with a third upper boss, the first The height of the three upper bosses is preferably 20-25mm, the third last boss matches the groove of the fixed plate 4, and the height of the third upper boss is greater than the depth of the groove, so that the gap between the fixed plate 4 and the base 5 There is a certain gap between them to ensure that the connecting bracket 7 will not contact the upper surface of the base 5, and the diameter of the third upper boss is determined according to the groove size of the lower surface of the rotating disk 4, so that the fixed disk 4 lower surface can be fixed. The groove of the groove and the third upper boss on the upper surface of the base 5 are closely engaged with each other, thereby ensuring the stable operation of the inclinometer calibration turntable. Furthermore, the diameter of the base 5 is preferably at least one third larger than the diameter of the fixed disk 4 .

The above-mentioned rotating disk 2, biasing disk 3, and fixed disk 4 are preferably circular disks, and may also be in the shape of an ellipse or the like.

When using the inclinometer calibration turntable involved in the utility model for calibration, the following steps are performed:

(1) First install the inclinometer on the vertical drilling electronic joint, and then place the vertical drilling electronic joint on the rotating disk 2 of the inclinometer calibration turntable, wherein the center hole of the vertical drilling electronic joint is in contact with the upper surface of the rotating disk 2 The first upper boss is tightly engaged, and ensures that the center of the vertical drilling electronic section and the center of the rotating disk 2 are in a straight line;

(2) Turn the offset screw 8 to rotate the offset disc 3 around the pin shaft 6 at a certain angle, so that there is a certain angle between the offset disc 8 and the fixed disc 4, wherein the rotation angle is at least greater than 1°;

(3) Make the rotating disk 2 rotate around its center, thereby driving the vertical drilling electronic joint to rotate around its center. When the vertical drilling electronic joint rotates at a certain angle, record the inclination After the electronic section rotates for one cycle, calculate the translation and rotation coefficients required to make the coordinate system of the inclinometer coincide with the coordinate system of the electronic section according to the obtained well inclination angle and high side tool face angle, and then calculate the well inclination measured by the inclinometer The angle and high side tool face angle are unified into the electronic node coordinate system, so as to obtain the actual inclination angle and high side tool face angle of the drilling tool.

The above method can eliminate or greatly reduce the influence of the non-parallelism on the measurement of the inclination and the high side tool angle by the inclinometer, and improve the precision of drilling.

A representative embodiment of the present invention has been described in detail with reference to the accompanying drawings. These detailed descriptions only provide those skilled in the art with further details for implementing preferred aspects of the present invention, and do not limit the scope of the present invention. Only the claims are used to determine the protection scope of the present utility model. Therefore, combinations of features and steps in the foregoing detailed description are not necessarily required to practice the invention in the broadest scope, and are instead taught only specifically described representative embodiments of the invention. Furthermore, the various features taught in the specification may be combined in ways not specifically enumerated, in order to obtain additional useful embodiments of the invention.

Claims (8)

1. demarcate rotating disk for the inclinometer of vertical drilling electronics joint for one kind, it comprises thrust bearing (1), rotating disc (2), biased dish (3), fixed disk (4) and base (5), wherein, rotating disc (2) is positioned at the top that rotating disk demarcated by inclinometer, biased dish (3) is positioned at the below of rotating disc (2), thrust bearing (1) is positioned between rotating disc (2) and biased dish (3), it is characterized in that: be provided with screwed hole in the side of biased dish (3), biasing screw (8) is provided with in screwed hole, this biasing screw (8) passes perpendicularly through a lateral edges of biased dish (3), like this can by this biasing screw of degree of tightness (8) and then the angle of eccentricity regulating biased dish (3).

2. rotating disk demarcated by inclinometer according to claim 1, it is characterized in that: the upper and lower surface of described rotating disc (2) is equipped with boss, wherein be provided with the first convex platform on the surface thereon, be provided with the first lower convex platform on the lower surface thereof, the geometric center of the first convex platform and the first lower convex platform overlaps with the geometric center of rotating disc (2), and the upper surface of biased dish (3) is provided with the second convex platform.

3. rotating disk demarcated by inclinometer according to claim 2, it is characterized in that: rotating disc (2) and biased dish (3) are linked together by thrust bearing (1), wherein the upper of thrust bearing (1) is fastened with biased the second convex platform coiling (3) with the first lower convex platform of rotating disc (2) respectively by the protuberance at thrust bearing (1) two ends below, thus ensures that rotating disc (2) can rotate freely around its central axis.

4. rotating disk demarcated by the inclinometer according to any one of claim 1-3, it is characterized in that: be provided with bearing pin (6) hole in the side of biased dish (3), biased dish (3) is connected with connection bracket (7) by the bearing pin (6) in bearing pin (6) hole, to ensure that biased dish (3) can rotate around bearing pin (6), this screwed hole and bearing pin (6) hole are in same diametric(al).

5. rotating disk demarcated by inclinometer according to claim 4, it is characterized in that: fixed disk (4) is positioned at biased dish (3) below, its side is provided with a breach, this breach is positioned at bearing pin (6) hole site place, connection bracket (7) is also connected with fixed disk (4) by four screws through this breach, and such fixed disk (4) can be connected by one end with rotating disc (2).

6. rotating disk demarcated by inclinometer according to claim 5, it is characterized in that: on the soffit of fixed disk (4), be provided with groove.

7. rotating disk demarcated by inclinometer according to claim 6, it is characterized in that: base (5) is positioned at the bottom that rotating disk demarcated by inclinometer, its upper surface is provided with the 3rd convex platform, the matching grooves of the 3rd convex platform and fixed disk (4), and the degree of depth that the height of the 3rd convex platform is greater than groove makes the groove on fixed disk (4) soffit and mutually closely engages between the 3rd convex platform on base (5) upper surface, thus ensure that the steady running of rotating disk demarcated by inclinometer.

8. rotating disk demarcated by the inclinometer according to any one of claim 5-7, it is characterized in that: rotating disc (2), biased dish (3), fixed disk (4) and base (5) are circular.