CN111622672A - Method for drilling any tool surface branch by directional drilling auxiliary deflecting device - Google Patents

Abstract

The invention discloses a method for drilling an open branch of any tool face by a directional drilling auxiliary deflecting device, which specifically includes the following steps: 1) preparing materials and tools; 2) raising drilling tools; 3) running a hole bottom positioning pipe and Locator; 4) Running the whipstock; 5) Drilling; 6) Judging the success of branch opening. Compared with the prior art, the present invention has the advantages of simple structure and convenient processing. When the directional drilling needs to open branch holes but the hole track has been formed and cannot meet the branch position selection requirements, the present invention can realize the purpose of opening branch holes. , to avoid the adverse consequences of scrapping because the drilling trajectory does not meet the design requirements; improve the porosity of the depression angle directional drilling and the directional drilling of medium and thick coal seams, and it is not necessary to deliberately adjust the trajectory during the normal drilling process. Open branch location.

Description

A method for drilling an arbitrary tool face split branch by a directional drilling auxiliary deflecting device

technical field

The invention relates to the field of drilling tools, in particular to the technical field of directional drilling auxiliary deflecting device drilling any tool face branching technology.

Background technique

In the practical application of directional drilling, when branches need to be opened, it is often difficult to meet the requirements of branch location selection, and the manufacture and selection of branch point locations are greatly restricted, especially for negative-dip drilling and complex geological coal seam orientation along the bed In drilling construction, it is necessary to regularly and deliberately manufacture and reserve the opening branch position. Otherwise, once the top floor or abnormal area is drilled, it is impossible to find a suitable branch point position to open the branch, which will easily lead to the failure of the drilling hole to reach the designed trajectory and be scrapped. If the track segment is deliberately adjusted to create the opening branch position during the normal drilling process, the smoothness and accuracy of the drilling track need to be sacrificed, and it is easy to cause low-lying water on the track and affect the later extraction effect. The method of opening the branch of the incline to solve the above problem.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems mentioned in the background art, and to provide a method for drilling an arbitrary tool face branch with a directional drilling auxiliary deflection device.

For solving the above-mentioned technical problems, the technical scheme provided by the present invention is:

An auxiliary whipstocking device for directional drilling, comprising a positioner and a whipstock, the positioner is a cylindrical structure, one end of the positioner is a positioning inclined surface, and one end of the positioner away from the positioning inclined surface is provided. There is a positioning cone; the whipstock is a cylindrical structure, one end of the whipstock is a whipstock inclined surface, and one end of the whipstock away from the whipstock slope is a fixed slope.

As a preferred solution, the angle of the positioning inclined surface and the fixed inclined surface is the same.

As a preferred solution, the diameters of the positioner and whipstock are equal to the diameter of the drill bit.

As a preferred solution, the length of the positioner is 1.5m-3m, and the length of the whipstock is 1.5m-3m.

As a preferred solution, the bevel angles of the positioning inclined surface, the bevel-building inclined surface, and the fixed inclined surface are 15° to 20°.

A method for drilling an arbitrary tool face split branch by a directional drilling auxiliary deflection device, specifically comprising the following steps:

1) Prepare materials and tools: The processing locator and whipstock are ready for use at the drilling site, and a certain number of plug-in hole bottom locating tubes are prepared;

2) Propose the drilling tool: when the bottom of the directional drilling hole encounters an abnormal condition or the deviation of the drilling trajectory is large and needs to open a branch hole, the drilling tool is proposed after cleaning the hole;

3) Lowering the hole bottom positioning pipe and locator: analyze the drilling trajectory, determine the position where the branch hole needs to be opened, determine the length of the hole bottom positioning pipe according to the hole bottom position and the position of the branch point that needs to be opened, and run down the hole. Enter the hole bottom positioning pipe and the positioner, the positioning inclined surface of the cylindrical positioner is oriented towards the tool face of the hole that needs to be branched, and the drilling machine and the hole bottom motor are used to withstand the positioning inclined surface of the positioner with a 1.25 degree curvature, and It has been fed into the bottom of the hole. At this time, the drill bit and the positioning inclined surface form a "bow", that is, the motor tool face at the bottom of the hole is facing opposite to the inclined surface, and the drilling tool cannot be rotated during the delivery process to avoid changing the orientation of the positioning inclined surface;

4) Run the whipstock: Pull out the drilling tool again, run the whipstock, the whipstock inclined surface is oriented to the face of the tool that needs to open the branch hole, and the drill bit is pressed against the whipstock by the drilling rig. The inclined surface is always sent to the position of the positioner and pressed until it cannot be pushed. At this time, the two opposite inclined faces of the positioner and the whipstock are pressed against each other to form a wedge-shaped fastening effect with the hole wall, and the drilling tool cannot be rotated during the delivery process. , to avoid changes in the orientation of the inclined plane of the whipstock;

5) Drilling: When the drilling tool is pressed against the inclined surface of the whipstock, the drilling tool is moved back 1.0 meters, and the tool face is adjusted so that the drill bit faces the direction where the branch needs to be opened. At this time, the inclined surface of the whipstock is against the motor at the bottom of the hole. The camber of the elbow provides a support for the camber of the motor, slow down the drilling rig to advance slowly, and open the branch according to the branch-opening operation technique;

6) The open branch is successfully judged: the returning water becomes turbid; when the forward feed is too large, the resistance increases greatly or the pump is blocked; during the measurement, the inclination or azimuth changes as scheduled.

As a preferred solution, the material of the hole bottom positioning pipe is a PVC pipe.

Compared with the prior art, the present invention has the advantages that the structure is simple and the processing is convenient. When the directional drilling needs to open the branch hole but the hole track has been formed and the branch position selection requirement cannot be satisfied, the present invention can realize the purpose of opening the branch hole. , to avoid the adverse consequences of scrapping because the drilling trajectory does not meet the design requirements; improve the porosity of the depression angle directional drilling and the directional drilling in the middle and thick coal seam, and there is no need to deliberately adjust the trajectory during the normal drilling process. Open branch location.

Description of drawings

Figure 1 is a schematic structural diagram of a directional drilling auxiliary deflection device.

Figure 2 is a schematic diagram of the positioning pipe and the positioning device running into the bottom of the hole.

Fig. 3 is a schematic view of running the whipstock.

Fig. 4 is a schematic diagram of branch opening using a directional drilling auxiliary deflection device.

As shown in the picture: 1. Positioner, 2. Slope, 3. Drilling tool, 4. Positioning tube at the bottom of the hole, 101, Positioning slope, 102, Positioning cone, 201, Bevel slope, 202, Fixed slope face, 301, drill bit, 302, bottom hole motor.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", The orientation or positional relationship indicated by "front" and "rear" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the manner or the original must have The particular orientation, construction and operation in the particular orientation are therefore not to be construed as limitations of the invention. Furthermore, references to "first", "second", and "third" are for descriptive purposes only and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, “installation”, “connection” and “connection” should be understood in a broad sense, for example, a fixed connection or a detachable connection can be made. Connection, or integral connection; it can be a mechanical connection or a point connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

1, a directional drilling auxiliary whipstock device includes a positioner 1 and a whipstock 2, the positioner 1 is a cylindrical structure, one end of the positioner 1 is a positioning inclined surface 101, the positioning One end of the whipstock 1 away from the positioning inclined surface 101 is provided with a positioning cone 102; the whipstock 2 is a cylindrical structure, and one end of the whipstock 2 is the whipstock slope 201, and the whipstock 2 is far from the One end of the beveled inclined surface 201 is a fixed inclined surface 202 .

The positioning inclined surface 101 and the fixed inclined surface 202 have the same angle.

The diameter of the positioner 1 and the whipstock 2 is equal to the diameter of the drill bit 301 .

The length of the positioner 1 is 1.5m-3m, and the length of the whipstock 2 is 1.5m-3m.

The bevel angles of the positioning inclined surface 101 , the bevel building inclined surface 201 , and the fixed inclined surface 202 are 15°˜20°.

A method for drilling an arbitrary tool face split branch by a directional drilling auxiliary deflection device, specifically comprising the following steps:

1) Prepare materials and tools: prepare a certain number of plug-in hole bottom positioning pipes 4 for processing the positioning device 1 and the whipstock 2 for standby use at the drilling site;

2) Propose drilling tool 3: when the bottom of the directional drilling hole encounters an abnormal condition or the deviation of the drilling trajectory needs to open a branch hole, the drilling tool 3 is proposed after cleaning the hole;

3) Run the positioning pipe 4 and locator 1 at the bottom of the hole: analyze the drilling trajectory, determine the position where the branch hole needs to be opened, and determine the length of the positioning pipe 4 at the bottom of the hole according to the position of the hole bottom and the position of the branch point to be opened. The hole bottom positioning pipe 4 and the positioner 1 are inserted into the hole, and the positioning inclined surface 101 of the cylindrical positioner 1 faces the tool face of the hole that needs to be branched, and is supported by the drilling machine and the hole bottom motor 302 with a curvature of 1.25 degrees. The positioning inclined surface 101 of the positioner 1 is sent all the way to the bottom of the hole. At this time, the drill bit 301 and the positioning inclined surface 101 form a "bow", that is, the tool face of the motor 302 at the bottom of the hole is opposite to the inclined surface, and the drilling tool cannot be rotated during the delivery process. 3. Avoid changing the orientation of the positioning inclined surface 101, as shown in Figure 2;

4) Run into whipstock 2: Pull out drilling tool 3 again, run into whipstock 2, the whipstock inclined surface 201 of whipstock 2 is oriented towards the tool face that needs to open branch holes, and the drill bit 301 is withstood by the drilling rig The inclined surface 201 of the whipstock 2 is always sent into the position of the positioner 1 and is pushed until it cannot be pushed. At this time, the two opposite slopes of the positioner 1 and the whipstock 2 are pressed against each other to form a wedge shape with the hole wall. Fastening action, the drilling tool 3 cannot be rotated during the delivery process, so as to avoid the change of the orientation of the whipstock inclined surface 201 of the whipstock 2, as shown in FIG. 3;

5) Drilling: when the drilling tool 3 is pressed against the whipstock 2's sloped surface 201, the drilling tool 3 is moved back by 1.0 meters, and the tool face is adjusted so that the drill bit 301 faces the direction where the branch needs to be opened. 201 Hold the camber of the elbow of the motor 302 at the bottom of the hole, give a support to the camber of the motor 302 at the bottom of the hole, adjust the speed of the drilling rig to slowly advance, and open the branch according to the branch-opening operation technique, as shown in Figure 4;

6) The open branch is successfully judged: the returning water becomes turbid; when the forward feed is too large, the resistance increases greatly or the pump is blocked; during the measurement, the inclination or azimuth changes as scheduled.

The hole bottom positioning pipe 4 is made of PVC pipe.

The present invention and its embodiments have been described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it, and without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, all should belong to the protection scope of the present invention.

Claims (7)

1. The utility model provides a directional drilling assists deflecting device, includes locator and whipstock, its characterized in that: the positioner is of a cylindrical structure, one end of the positioner is a positioning inclined plane, and one end of the positioner, which is far away from the positioning inclined plane, is provided with a positioning cone; the whipstock is of a cylindrical structure, one end of the whipstock is a whipstock inclined plane, and one end, away from the whipstock, of the whipstock is a fixed inclined plane.

2. The directional drilling auxiliary deflecting device according to claim 1, wherein: the angle of the positioning inclined plane is the same as that of the fixed inclined plane.

3. The directional drilling auxiliary deflecting device according to claim 1, wherein: the diameter of the positioner and whipstock is equal to the diameter of the drill bit.

4. The directional drilling auxiliary deflecting device according to claim 1, wherein: the length of the positioner is 1.5-3 m, and the length of the whipstock is 1.5-3 m.

5. The directional drilling auxiliary deflecting device according to claim 1, wherein: the inclined plane angles of the positioning inclined plane, the deflecting inclined plane and the fixing inclined plane are 15-20 degrees.

6. A method for drilling any tool surface branch by using a directional drilling auxiliary deflecting device is characterized by comprising the following steps:

1) preparing materials and tools: processing a positioner and a whipstock for later use in a drilling site, and preparing a certain number of plug-in type hole bottom positioning pipes;

2) and (3) lifting the drilling tool: when the bottom of the directional drilling hole meets abnormal conditions or the deviation of the drilling track is large and branch holes need to be drilled, the drilling tool is lifted out after hole washing;

3) a lower inlet bottom positioning tube and a positioner: analyzing a drilling track, determining the position of a branch hole to be drilled, determining the length of a hole bottom positioning pipe according to the position of a hole bottom and the position of the branch point to be drilled, putting the hole bottom positioning pipe and a positioner into a drilled hole, enabling a positioning inclined plane of a cylindrical positioner to face the tool surface of the hole to be drilled, enabling a drill to abut against the positioning inclined plane of the positioner through a drilling machine by utilizing a hole bottom motor in a bending degree of 1.25 degrees, and sending the positioning inclined plane into the hole bottom all the time, enabling a drill bit and the positioning inclined plane to form a bow shape at the moment, enabling the tool surface of the hole bottom motor to face opposite to the inclined plane, and enabling the drilling tool not to rotate in the pushing process to avoid changing the;

4) and (3) descending a whipstock: the drilling tool is put out again, the whipstock is put in, the deflecting inclined plane of the whipstock faces to the tool face which needs to open the branch hole, the drill bit is propped against the deflecting inclined plane of the whipstock through the drilling machine and is always sent into the position of the positioner and propped until the drill bit cannot be pushed, at the moment, two reverse inclined planes of the positioner and the whipstock extrude towards each other to form a wedge-shaped fastening effect with the hole wall, the drilling tool cannot be rotated in the propping process, and the deflecting inclined plane of the whipstock is prevented from changing;

5) drilling: after the drilling tool abuts against a deflecting inclined surface of the deflecting device, the drilling tool retreats backwards for 1.0 meter, the tool surface is adjusted to enable the drill bit to face the position needing to be branched, the deflecting inclined surface abuts against the arch back of a motor elbow at the bottom of a hole at the moment, a support is provided for the arch back of the motor, the slow drilling machine is slowly pushed, and the branch is branched according to a branch-opening operation technology;

6) and (3) successfully judging the branch opening: returning water to become turbid; when the forward feeding is too large, the resistance is greatly increased or the pump is held back; during measurement, the inclination angle or the azimuth angle is changed according to a preset value.

7. The method of drilling any toolface open branch with directional drilling assisted whipstock as claimed in claim 6, wherein: the hole bottom positioning pipe is made of a PVC pipe.

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