CN102134978B - Drill hole wall protecting and leakage plugging method or slope guide deviation drilling method and used device thereof - Google Patents

Abstract

The invention discloses a method for plugging or deflecting and deflecting the drill hole and a PVC material holding pipe device used therein. The method includes: preparing a PVC material-filling pipe device; sending the PVC material-holding pipe device into the target position of the drilling hole through a drill pipe; using a stirring drill bit in the hole to perform partial stirring in the hole, breaking the PVC material-filling pipe, and making The material in the pipe is fully mixed and extruded at the target position, and combined with the formation glue to form an artificial hole wall in a short time, or quickly form an artificial hole bottom that matches the formation rock. The used PVC material pipe device at least includes a PVC material pipe and a stirring drill in the hole, and the PVC material pipe is suspended at the lower end of the agitating drill in the hole through a hanging ring arranged at its upper end. The method and device provided by the invention enable accurate positioning when entering into a borehole, are not easy to be lost, have controllable coagulation time, controllable strength of a consolidated body, are economical and effective, and have good operability.

Description

A method for plugging or deflecting and deflecting drilling on the retaining wall of a drilling hole and the device used therefor

technical field

The invention relates to a method for plugging leakage or deflecting and deflecting drilling with a retaining wall of a drilling hole and a device used therefor, belonging to the field of drilling engineering.

Background technique

So far, drilling is the only technical way to obtain deep underground physical data. However, because the drilling project is a concealed project with geological bodies (strata) of different geological origins as the work object, the drilling construction often encounters unfavorable geological bodies such as fault zones, structural zones, broken zones, fissures, multiple voids, and cavities. There are complex situations such as leakage, water gushing, collapse, and block falling, which lead to serious wellbore instability, low drilling efficiency, many accidents, long drilling cycle, and difficult to guarantee drilling quality. Conventional technologies in the drilling process, such as mud technology, grouting retaining wall plugging technology and casing schemes often cannot solve the problem of retaining wall plugging under complex conditions, or the technical economy and operability cannot meet the requirements of the site.

At the same time, in the process of drilling, the deflection prevention, stabilization and deflection control of the drilling wellbore trajectory are also unavoidable problems. In order to maintain normal drilling and meet the requirements of geological targets, drilling with an inclination exceeding the standard requires deflection drilling. Perform deflection correction; drilling accidents require drilling around deflection. These deflection drilling is a complex technical process that requires corresponding technical conditions, but whether it is screw drilling tool deflection correction or continuous whipstock deflection correction, when the deflection correction is performed on the bottom of the artificial hole formed by cement grouting, the waiting time It takes a long time, and it is often difficult to deviate in the predetermined direction due to the large difference between the cement slurry stone body and the drillability of the formation, or the deflection efficiency is low.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention provides a method for plugging or guiding and deflecting the drill hole and the device used therefor. The method and device provided by the present invention enable accurate positioning when entering into the borehole, and are not easy to be lost. , the coagulation time is controllable, the strength of the consolidated body is controllable, economical and effective, and the operability is good.

In order to achieve the above object, the present invention adopts the following technical solution: a method for plugging or deflecting and deflecting the drill hole wall, said method comprising the following steps:

(1) Preparation of PVC material pipe device:

Cut the pipe head at one end of the PVC pipe into a melon shape, put them together into a cone shape and wrap it with sealing tape as the pipe tip;

Put the material consisting of main material, auxiliary material and mixing water into the PVC pipe;

Install a plug on the upper end of the PVC pipe, and install a hanging ring on the plug;

Suspend the PVC material holding pipe on the suspension ring connection buckle located at the lower end of the stirring drill bit in the hole through the hanging ring arranged at the upper end of the PVC material holding pipe to form a PVC material holding pipe device;

(2) The PVC material holding pipe device is sent into the drilling target position through the drill rod;

(3) After sending the PVC material pipe device into the target position of the drilling hole, use the in-hole agitation drill bit to perform local stirring in the hole, smash the PVC material pipe, and make the material in the pipe fully mix and extrude at the target position , combined with the formation glue to form an artificial hole wall in a short time, or quickly form an artificial hole bottom that matches the formation rock.

When used for different purposes, the filling method of the material is different. When used for plugging of drilling wall, put the mixing water and auxiliary materials in a fragile container; stir the main materials evenly, and place them in PVC pipes in layers at intervals with the fragile container until all the main materials and auxiliary materials until finished. When used for deflection drilling, there are two filling methods. The mixing water can be placed in a fragile container; all the main ingredients and auxiliary materials are mixed evenly on the surface, and the fragile container is layered in a PVC pipe at intervals. All the main materials, auxiliary materials and mixing water can also be mixed evenly on the surface to form a slurry; the formed slurry is loaded into the material holding pipe.

When used for different purposes, the compatibility of the main materials and auxiliary materials in the used materials is different, as shown in the following table:

PVC pipes of corresponding specifications can be selected for different drilling diameters, among which Φ59 drilling holes are equipped with Φ50 PVC pipes; Φ75 drilling holes are equipped with Φ63 PVC pipes; Φ95, Φ110 drilling holes are equipped with Φ90 PVC pipes; Drilling with Φ200PVC pipe.

The PVC material pipe device used in this method at least includes a PVC material pipe and a stirring drill in the hole, wherein the PVC material pipe is composed of a pipe tip, a pipe body, a plug and a hanging ring, and the pipe tip is arranged at the lower end of the PVC material pipe. , in a conical shape, the material is placed in the pipe body, the plug is set on the upper end of the PVC material tube, and the hanging ring is set on the plug; the stirring drill bit in the hole is a double-wing drill bit, which is composed of a small diameter drill rod, a hard Composed of alloy teeth, double wings, one-way valve and suspension ring connecting buckle, the one-way valve is provided with a flow hole, hard alloy teeth are installed on the double wings, the suspension ring connecting buckle is set at the lower end of the stirring drill in the hole, PVC material The pipe is suspended on the connecting buckle of the suspension ring through the hanging ring arranged at its upper end. The one-way valve is located at the connecting part of the drill pipe and the drill bit.

Compared with the prior art, the method and device provided by the invention have the following advantages:

1. Make it possible to accurately locate when entering the drilling hole, and it is not easy to lose;

2. The coagulation time is controllable, and the strength of the consolidated body is controllable; it can be used for wall plugging and deflection in complex situations, which is economical and effective, and has good operability.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the PVC material holding pipe device of the present invention.

Fig. 2 is a schematic structural view of the PVC material holding pipe of the present invention.

Fig. 3 is a schematic structural view of the in-hole stirring drill bit of the present invention.

In the figure: 1-pipe tip; 2-pipe body; 3-plug; 4-hanging ring; 5-auxiliary material; 6-fragile container; 7-main material; 8-small diameter drill pipe; 9-hard alloy Teeth; 10-double fins; 11-flow holes; 12-one-way valve. 13-stirring drill bit in the hole; 14-suspension ring connection buckle; 15-PVC material pipe.

Detailed ways

The leak-stopping or deflection-drilling method provided by the present invention and the device used in it will be described in further detail below in conjunction with the accompanying drawings.

The method for plugging or deflecting and deflecting the drill hole of the present invention is based on a PVC material-filling pipe device, which at least includes a PVC material-filling pipe 15 and a stirring drill bit 13 in the hole, wherein the PVC material-holding pipe It is composed of pipe tip 1, pipe body 2, plug 3 and hanging ring 4. The pipe tip 1 is set at the lower end of the PVC material holding pipe in a conical shape. The material is placed in the pipe, and the plug 3 is set at the upper end of the PVC material holding pipe. , the hanging ring 4 is located on the plug 3; the stirring drill bit in the hole is a double-wing drill bit, which is composed of a small-diameter drill rod 8, a hard alloy tooth 9, a double wing piece 10, a one-way valve 12 and a suspension ring connecting buckle 14. , the one-way valve is provided with an overflow hole 11, the hard alloy teeth 9 are inlaid and installed on the double wings 10, the suspension ring connection buckle 14 is located at the lower end of the stirring drill bit 13 in the hole, and the PVC material pipe passes through the hanging ring located at the upper end. The ring 4 is suspended on the connecting buckle 14 of the suspension ring. The one-way valve 12 is located at the connection part between the drill pipe and the drill bit.

The selected small-diameter drill pipe is a short drill pipe with a length of 3m and Φ42mm. It is connected with the working drill pipe, which not only ensures the transmission of the shaft load and torque of the drilling rig, but also facilitates the full and uniform mixing of the material pipe in the hole. . The one-way valve 12 installed at the joint between the drill pipe and the drill bit ensures the normal flow of mud in the drill pipe during the tripping process of the PVC feeding pipe, and the one-way valve is lifted during the stirring process to automatically close the port of the drill pipe , to prevent the stirred solidified slurry from entering the inner cavity of the drill pipe and blocking the drill pipe. After the stirring is completed, send water to make the one-way valve go down, and the flow hole 11 is exposed, so that the inner cavity of the drill pipe communicates with the annulus of the drill hole, so as to avoid water blocking in the drill pipe when the drill is lifted. The method provided by the present invention will be described in detail below by taking the retaining wall plugging and deflection drilling as examples.

Embodiment 1: retaining wall plugging

When complex situations such as leakage, water gushing, collapse, and block falling are encountered during the drilling process, the method and device provided by the present invention can be used for wall plugging.

The specific steps for wall plugging are as follows:

(1) Preparing a PVC material holding pipe device;

As shown in the figure, cut the pipe head at one end of the PVC pipe into a melon shape, put them together into a cone shape and wrap it with sealing tape as the pipe tip 1. When carrying out wall plugging, put the mixing water and auxiliary material 5 in the fragile container 6; stir the main material 7 evenly, and place the fragile container 6 in the PVC pipe in layers at intervals until all the main materials and auxiliary materials until finished. Plug 3 is then installed on the PVC pipe upper end, and hanging ring 4 is installed on the plug. Then by the hanging ring 4 that is located at the upper end of the PVC material holding pipe, the PVC material holding pipe is suspended on the suspension ring connection buckle that is located at the lower end of the stirring drill bit in the hole to form a PVC material holding pipe device.

(2) The PVC material holding pipe device is sent into the drilling target position through the drill rod;

(3) After sending the PVC material pipe device into the target position of the drilling hole, use the in-hole agitation drill bit to perform local stirring in the hole, smash the PVC material pipe, and make the material in the pipe fully mix and extrude at the target position , combined with the formation glue to form a whole, to form an artificial hole wall in a short time, to achieve the purpose of retaining wall plugging.

Different combinations of main materials and auxiliary materials can be selected for different purposes, as shown in the table below:

In the above table, calcium chloride, sodium chloride, ferric chloride, triethanolamine, sulfates, etc. can be used as early strength agents; water glass, calcium hydroxide, 711 type, Hongxing 1 type, etc. can be used as accelerators. The water reducing agent can be selected from M type, MF type, NNO type, FDN type, etc.; the curing agent can be selected from diaminotoluene (catalyst) and water (reactant); the resin can be selected from urea-formaldehyde resin, furfural resin, epoxy resin, etc. ; Acidic curing agent can choose phosphoric acid, aluminum sulfate, fluosilicic acid and hydrochloric acid and so on.

PVC pipes of corresponding specifications can be selected for different drilling diameters, among which Φ59 drilling holes are equipped with Φ50 PVC pipes; Φ75 drilling holes are equipped with Φ63 PVC pipes; Φ95, Φ110 drilling holes are equipped with Φ90 PVC pipes; Drilling with Φ200PVC pipe.

Example 2: Guided deflection drilling

When the wellbore deviates during the drilling process, the method and device provided by the invention can be used to guide the deflection and deviate the drilling.

The specific steps of guiding and deflecting drilling are as follows:

(1) Preparing a PVC material holding pipe device;

As shown in the figure, cut the pipe head at one end of the PVC pipe into a melon shape, put them together into a cone shape and wrap it with sealing tape as the pipe tip 1. When conducting deflection drilling, there are two ways to fill the material. The mixing water can be placed in the fragile container 6; The interval method is layered in the PVC pipe. It is also possible to mix all the main ingredients 7, auxiliary materials 5 and mixing water uniformly on the surface to form a slurry; put the formed slurry into the material holding pipe. Plug 3 is then installed on the PVC pipe upper end, and hanging ring 4 is installed on the plug. Then by the hanging ring 4 that is located at the upper end of the PVC material holding pipe, the PVC material holding pipe is suspended on the suspension ring connection buckle that is located at the lower end of the stirring drill bit in the hole to form a PVC material holding pipe device.

(2) The PVC material holding pipe device is sent into the drilling target position through the drill rod;

(3) After sending the PVC material pipe device into the target position of the drilling hole, use the in-hole agitation drill bit to perform local stirring in the hole, smash the PVC material pipe, and make the material in the pipe fully mix and extrude at the target position , and quickly form an artificial hole bottom that matches the formation rock, which is conducive to deflection and deflection drilling.

When used for deflection drilling, the main material is cement slurry, and the auxiliary material is gravel, sand and other aggregates.

Choose PVC pipes of corresponding specifications for different drilling diameters, among which Φ59 drilling holes are equipped with Φ50 PVC pipes; Φ75 drilling holes are equipped with Φ63 PVC pipes; Φ95, Φ110 drilling holes are equipped with Φ90 PVC pipes; The hole is equipped with Φ200PVC pipe.

Claims (6)

1. A method for plugging or deflecting and deflecting drilling of a borehole retaining wall, is characterized in that comprising the steps: (1) Preparation of PVC material pipe device: Cut the pipe head at one end of the PVC pipe into a melon shape, put them together into a cone shape and wrap it with sealing tape as the pipe tip; Put the material consisting of main material, auxiliary material and mixing water into the PVC pipe. When it is used to guide the deflection drilling, the main material is cement slurry, and the auxiliary material is aggregate; it is used for the main material and the auxiliary material in the material for wall plugging. The proportion of auxiliary materials is as follows:

; Install a plug on the upper end of the PVC pipe, and install a hanging ring on the plug; Suspend the PVC material holding pipe on the suspension ring connection buckle located at the lower end of the stirring drill bit in the hole through the hanging ring arranged at the upper end of the PVC material holding pipe to form a PVC material holding pipe device; (2) Send the PVC material holding pipe device to the target position of the drilling hole through the drill pipe; (3) After sending the PVC material pipe device into the target position of the drilling hole, use the in-hole stirring drill to perform partial stirring in the hole to crush the PVC material pipe, so that the material in the pipe can be fully mixed and squeezed at the target position , combined with the formation glue to form an artificial hole wall in a short time, or quickly form an artificial hole bottom that matches the formation rock. 2. according to claim 1, the method for plugging or guiding deflection and deflection of the drilling wall, is characterized in that: when used for plugging the drilling wall, the mixing water and auxiliary materials are placed in a fragile container; the main Stir the ingredients evenly, and layer them with the fragile container in the PVC pipe at intervals until all the main ingredients and auxiliary materials are filled. 3. according to claim 1, the method for plugging or deflecting and deflecting drilling according to the drilling retaining wall, is characterized in that: when being used for deflecting and deflecting drilling, the mixing water is placed in the frangible container; The auxiliary materials are evenly mixed on the surface, and placed in PVC pipes layered with fragile containers at intervals. 4. The method according to claim 1, characterized in that: when used for deflection and deflection drilling, all main materials, auxiliary materials and mixing water are uniformly mixed on the surface to form a slurry ; Fill the resulting slurry into the holding tube. 5. The method according to claim 1 for leak plugging or deflection drilling, characterized in that PVC pipes of corresponding specifications are selected for different borehole diameters, wherein Ф59 holes are equipped with Ф50 PVC pipes; Ф75 holes are equipped with Ф50 PVC pipes; Ф63 PVC pipe; Ф95, Ф110 holes are matched with Ф90 PVC pipe; Ф150, Ф130, Ф122 holes are matched with Ф110 PVC pipe; Ф215 holes are matched with Ф200 PVC pipe. 6. A PVC material holding pipe device used in the method according to claim 1, characterized in that: it at least comprises a PVC material holding pipe and a stirring drill bit in the hole, wherein the PVC material holding pipe is composed of a pipe tip, a pipe body, a plug and a hanging ring, the tip of the pipe is set at the lower end of the PVC material pipe, which is conical, the material is placed in the pipe body, the plug is set at the upper end of the PVC material pipe, and the hanging ring is set on the plug; the stirring in the hole The drill bit is a double-wing drill bit, which is composed of a small-diameter drill pipe, hard alloy teeth, double-wing pieces, a one-way valve and a suspension ring connecting buckle. , Carbide teeth are installed on the double fins, the suspension ring connection buckle is located at the lower end of the stirring drill bit in the hole, and the PVC material pipe is suspended on the suspension ring connection buckle through the suspension ring located at its upper end.

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