CN107401388B - Device and method for treating stuck drill of a drilling rig - Google Patents

Abstract

The invention discloses a drilling rig sticking treatment device and method, which are suitable for the field of bridge pile foundation drilling construction, and comprise two arc-shaped steel plates, a connecting flange, a guide sleeve and a drill rod prepared according to the hole depth. The invention effectively avoids damage to the hole wall and damage to the drilling rig itself during the process of handling stuck drills; shortens the time for handling stuck drills as much as possible, improves work efficiency; reduces unnecessary manpower and equipment investment, and saves treatment costs.

Description

Device and method for treating stuck drill of a drilling rig

technical field

The invention belongs to the field of bridge pile foundation drilling construction, and in particular relates to the treatment of drill sticking of a rotary drilling rig.

Background technique

1. Treatment measures for traditional rotary drilling rig stuck drill:

1) Break the salvage law

Firstly, the drill bit and the drill pipe are demolished (generally, there are blasting demolition and mechanical demolition), and then a special casing drill bit is used to ream the hole at the bottom of the drill bit, and then the bottom is salvaged, which is a relatively common method.

2) Strong lifting method

Use the jack or on-site floating crane to cooperate with the lifting force of the drilling rig itself to lift the drill pipe of the drilling rig, so as to raise the drill bit and solve the problem of drill sticking.

3) Steel pipe slag suction method

A small steel pipe is connected with an external air pipe, lowered to the position where the drill is stuck, and the deposited sand and gravel fragments are disturbed by repeated insertion and punching, and the external air pipe is used for reverse circulation to suck the slag, so as to remove the rock where the drill is stuck. Broken, to solve the stuck drill problem.

2. Limitations of traditional treatment measures:

Although the traditional treatment measures can also solve the stuck drill problem. But there are the following limitations:

1) The removal and fishing method is a relatively common method to deal with stuck drills, but it takes a long time, and the fishing from the bottom causes serious hole reaming, damages the hole wall, and is prone to secondary accidents.

2) The powerful lifting method is generally applicable to drill hammers stuck in loose layers. In the case of serious drill sticking, it is easy to cause the breakage of the connecting bolts of the drill pipe and aggravate the accident.

3) Although the steel pipe slag suction method can also solve the problem of drill sticking, it is limited by the diameter of the steel pipe, and can only remove sand and gravel fragments smaller than the diameter of the steel pipe, so it is only suitable for small-diameter drilling rigs and cannot solve the problem of large-diameter pile foundations. Drill stuck problem.

Contents of the invention

The object of the present invention is to: provide a drilling rig stuck drill treatment device and method, avoid damage to the hole wall and the drill itself in the process of handling drill stuck; shorten the time for drilling stuck treatment as much as possible, improve work efficiency; reduce unnecessary The input of manpower and equipment saves the processing cost.

The object of the invention is achieved through the following technical solutions:

A drill sticking treatment device for a drilling rig, including a rock breaker, a drill pipe, a connector and a guide sleeve. It is larger than the outer diameter of the drill pipe of the stuck drill rig, and can be set on the drill pipe of the stuck drill rig to move up and down. The moving direction of the guide sleeve is in line with the rock breaking direction of the rock breaker, and the distance between the two is equal to that of the stuck drill. The distance from the drill pipe of the drilling rig to the edge of the drill bit; the rock breaker includes two curved metal plates and a wire brush. The bottom of the curved metal plate is tapered and equipped with a wire brush. Two curved metal plates Take the drill pipe of the stuck drill rig as the axis and parallel to it at a certain distance, and the two side edges of the two arc-shaped metal plates are fixed and closed to form a mud circulation channel that penetrates up and down.

In this application, the two arc-shaped metal plates are sealed and fixed (such as welding), and a certain distance is left between the two arc-shaped metal plates. After the shaped metal plate is welded, the bottom opening is cut into a pointed cone for rock breaking, and a wire brush is added at the bottom to disturb the sediment; the welding flange at the top of the connector is used to connect the drill pipe for lowering; the connection Then weld the guide sleeve on the outer side of the part, and insert it into the drill pipe of the original stuck drill rig as a guide. The tool requires less material, has a simple structure, and is quick to make. The construction site can use local materials to reduce unnecessary waste of materials.

Optionally, a reinforcement member connected between the two sides of the curved metal plate is also included. In this solution, the reinforcement is used to strengthen the curved metal plate.

As an option, the connecting piece includes a flange and a connecting rod, the two ends of the connecting rod are connected and fixed to the rock breaker and the guide sleeve, the top of the connecting rod is connected and fixed to the flange, and the flange is detachably connected to the bottom of the drill pipe.

A drilling rig sticking treatment method using the aforementioned drilling rig sticking treatment device, comprising the following steps in sequence:

1) After using a crane to insert the guide sleeve into the drill pipe of the original stuck drill rig, connect the drill pipe of the drill stuck processing device with the top flange of the rock breaker, and lower it along the drill pipe of the stuck drill rig;

2) When the rock breaker is lowered to the stuck drill position, the crane lifts and lowers the rock breaker through the drill pipe of the drill sticking treatment device of the drilling rig, and uses the impact force generated by its own weight to break the sandstone at the stuck drill position; The sandstone is positively circulated through the opening at the bottom of the mud circulation channel on the rock breaker, and then sucked out by reverse circulation through the drill pipe of the original stuck drill rig until the rock breaker reaches the bottom of the drill bit;

3) After the rock breaker reaches the bottom of the drill bit, it is circulated for a period of time. After the broken rock slag is fully removed, it is lifted out, and then it is lowered to another place around the borehole wall, and the rock is broken according to step 2;

4) Since the rock breaker has an arc-shaped structure, it needs to be lowered several times around the hole wall until the rock at the bit stuck around the drill bit is completely broken;

5) After the above steps are completed, the drill bit can be lifted out. If it cannot be lifted out, repeat steps 2) to 4) several times.

The above-mentioned main scheme of the present invention and its further options can be freely combined to form multiple schemes, all of which are applicable and claimed in the present invention; can also be combined freely. After understanding the solution of the present invention, those skilled in the art can understand that there are various combinations based on the prior art and common knowledge, all of which are technical solutions to be protected by the present invention, and are not exhaustive here.

Beneficial effects of the present invention:

1) Reduce the disturbance to the wellbore and prevent secondary accidents during the treatment process:

Compared with the abolishing fishing method, this tool does not need to cut the drill pipe, and does not need to add an additional overshot drill, which reduces unnecessary waste, basically has no disturbance to the hole wall, does not cause hole expansion, and eliminates the need for overshot during the overfishing process. The occurrence of secondary accidents.

2) It saves the stuck drill time, increases the work efficiency, and is beneficial to speed up the project progress:

This tool is simple to make and easy to operate. Compared with the preparation time required by the breaking and salvage method, the time for breaking the drill pipe, and the time for drilling and fishing of the barrel drill, the processing time is greatly reduced, the work efficiency is increased, and the construction is provided. Convenience.

3) Reduced potential safety hazards in the process of drill stuck processing:

Compared with the traditional treatment method, this sticky drill treatment tool has no high risks such as underwater cutting and drill pipe breakage, and all construction can be completed by only one crane, which greatly reduces the danger of treatment.

Description of drawings

Fig. 1 is a schematic plan view of an embodiment of the present invention;

Fig. 2 is the elevation structure schematic diagram of the embodiment of the present invention;

Fig. 3 is a schematic diagram of the side structure of Fig. 2;

Fig. 4 is a block flow diagram of the drilling rig sticking processing method of the present invention;

Fig. 5 is a schematic diagram of the state of the embodiment of the present invention lowered to the stuck drill position;

Fig. 6 is a schematic diagram of the state of breaking the rock at the drill stuck position according to the embodiment of the present invention;

Fig. 7 is a schematic diagram of the state of pulling out after the embodiment of the present invention is broken;

In the figure, 1 is a curved steel plate, 2 is a flange, 3 is a guide sleeve, 4 is a drill pipe, 5 is a connecting rod, 6 is a reinforcement, and 7 is a mud circulation channel.

Detailed ways

The following non-limiting examples illustrate the invention.

As shown in Figures 1-3, a drilling rig sticking treatment device includes a rock breaker, a drill pipe 4, a connecting piece and a guide sleeve 3. rock tool and guide sleeve 3, the inner diameter of guide sleeve 3 is greater than the drill pipe outer diameter of the stuck drill rig, and can be placed on the drill pipe of the stuck drill rig to move up and down, and the moving direction of the guide sleeve 3 is the same as that of the rock breaker. The rock direction is even, so that the rock breaker can break the rock with the movement of the guide sleeve 3, and the distance between the two is equal to the distance from the drill pipe of the stuck drill rig to the edge of the drill bit, so that the rock breaker can just be located between the drill bit and the drill bit. The stuck drill position of the wellbore wall; the rock breaker includes two curved metal plates (preferably curved steel plate 1), and a wire brush (preferably a steel wire brush), and also includes a reinforcement connected between the two sides of the curved steel plate 1 Item 6. The bottom of the arc-shaped steel plate 1 is pointed and conical, and is equipped with a wire brush. The two arc-shaped steel plates 1 take the drill pipe of the stuck drill rig as the axis and are spaced in parallel at a certain distance, and the two sides of the arc-shaped steel plate 1 are fixed. Closed to form a mud circulation channel 7 that runs through up and down. The connecting piece includes a flange 2 and a connecting rod 5, the two ends of the connecting rod 5 are connected and fixed to the arc-shaped steel plate 1 and the guide sleeve 3, the top of the connecting rod 5 is connected and fixed to the flange 2, and the flange 2 is connected to the bottom of the drill pipe 4 Detachable connection.

As an option, the arc-shaped metal plate is an arc-shaped steel plate 1, two arc-shaped steel plates 1 are welded into a hollow whole, and the middle is used as a mud circulation channel 7, and the arc-shaped steel plate 1 and the guide sleeve 3 are welded to form a whole through the connecting rod 5, The length of connecting rod 5 is the difference between the radius of the stuck drill bit and the radius of the guide sleeve 3; the flange 2 is fixed on the upper end of the connected rod 5 (bolted connection or welding), and the diameter of the guide sleeve 3 is greater than the diameter of the drill rod of the stuck drill rig. When lowering, insert the guide sleeve 3 onto the drill pipe of the stuck drill rig to ensure that no deviation occurs during the lowering.

As an example, as an example, during the construction of a pile foundation with a diameter of 2.5m, due to the phenomenon of inclined holes in the borehole, the drill bit will be stuck at the position of the inclined hole during the lifting process, resulting in a stuck drill accident. Drill handling device, as follows:

Arc-shaped steel plate 1: The arc length is 1.3m, about 1/6 of the circumference, and the two pieces are welded into a whole, with a 5cm gap in the middle as the mud circulation channel 7.

Flange 2: used for the connection of drill pipe 4.

Drill pipe 4: about 20 cm in diameter, connected to the flange 2, used for lowering the tool.

Guide sleeve 3: about 85cm in diameter and about 2m in length. After being inserted into the stuck drill pipe, the tool can be accurately lowered to the stuck drill position along the drill pipe without deviation.

Connecting rod 5: about 81 cm in length, used to connect the curved steel plate 1, the flange 2 and the guide sleeve 3.

A drilling rig sticking treatment method using the aforementioned drilling rig sticking treatment device, as shown in Figure 4-7, includes the following steps in sequence:

1) After using a crane to insert the guide sleeve 3 onto the drill pipe of the original stuck drill rig, connect the drill pipe 4 of the drill stuck treatment device with the top flange 2 of the arc-shaped steel plate 1, along the drill pipe of the stuck drill rig carry out decentralization;

2) When the curved steel plate 1 is lowered to the stuck drill position, the crane lifts and lowers the curved steel plate 1 through the drill pipe 4 of the drill stuck processing device of the drilling rig, and uses the impact force generated by its own weight to break the sandstone at the stuck drill position ; The broken sandstone is positively circulated through the opening at the bottom of the mud circulation channel 7 on the arc-shaped steel plate 1, and then the scum is reverse-circulated through the drill pipe of the original stuck drill rig until the arc-shaped steel plate 1 reaches the bottom of the drill bit;

3) After the arc-shaped steel plate 1 reaches the bottom of the drill bit, it is circulated for a period of time. After the broken rock slag is fully removed, it is lifted out, and then another place is selected around the borehole wall to be lowered, and the rock is broken according to step 2;

4) Since the arc-shaped steel plate 1 has an arc-shaped structure, it needs to be lowered several times around the hole wall until the rock at the bit stuck around the drill bit is completely broken;

5) After the above steps are completed, the drill bit can be lifted out. If it cannot be lifted out, repeat steps 2) to 4) several times.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (2)

1. The utility model provides a rig card bores processing apparatus which characterized in that: the device comprises a rock breaker, a drill rod, a connecting piece and a guide sleeve, wherein the connecting piece is detachably connected to the bottom of the drill rod, the rock breaker and the guide sleeve are fixedly connected to the two ends of the connecting piece, the inner diameter of the guide sleeve is larger than the outer diameter of the drill rod of the drilling machine, the guide sleeve can be sleeved on the drill rod of the drilling machine to move up and down, the moving direction of the guide sleeve is parallel to the rock breaking direction of the rock breaker, and the distance between the rock breaker and the guide sleeve is equal to the distance from the drill rod of the drilling machine to the drill bit side; the rock breaker comprises two arc-shaped metal plates and metal wire brushes, wherein the bottoms of the arc-shaped metal plates are in a pointed cone shape and are provided with the metal wire brushes, the two arc-shaped metal plates take a drill rod of a drilling machine as an axis and are spaced in parallel by a certain distance, and the edges of the two sides of the two arc-shaped metal plates are fixedly sealed to form a slurry circulation channel which penetrates up and down; the reinforcing piece is connected between the two sides of the arc-shaped metal plate; the connecting piece includes ring flange and connecting rod, and fixed broken rock ware of connecting rod both ends connection and guide sleeve, connecting rod top and ring flange are connected fixedly, and the ring flange can be dismantled with the drilling rod bottom and be connected.

2. A drill sticking processing method using the drill sticking processing device according to claim 1, characterized by comprising the following steps in order:

1) After the guide sleeve is sleeved on the drill rod of the original stuck drill by adopting a crane, connecting the drill rod of the stuck drill treatment device of the drill with a flange plate at the top of the rock breaker, and lowering the drill rod of the stuck drill;

2) When the rock breaker is lowered to the stuck drill position, the crane lifts and lowers the rock breaker through the drill rod of the drill stuck drill processing device of the drilling machine, and the sandstone at the stuck drill position is crushed by utilizing the impact force generated by the self weight of the rock breaker; the broken sandstone is subjected to forward circulation scum through an opening at the bottom of a mud circulation channel on the rock breaker, and then is subjected to reverse circulation suction through a drill rod of an original stuck drill, until the rock breaker reaches the bottom of a drill bit;

3) After the rock breaker reaches the bottom of the drill bit, circulating for a period of time, after the broken rock slag is fully removed, lifting the broken rock slag, then selecting another place around the periphery of the hole wall of the well hole, and breaking the rock according to the step 2;

4) Because the rock breaker is of an arc-shaped structure, the rock breaker needs to be sequentially lowered for a plurality of times around the periphery of the hole wall until the rock at the drill clamping position around the drill bit is completely broken;

5) After the above steps are completed, the drill bit can be lifted, if the drill bit cannot be lifted, the steps 2) to 4) are repeated for several times.