KR102032129B1 - Exploration drilling system for preventing kick - Google Patents

Abstract

An objective of the present invention is to provide an exploration drilling system for kick prevention, which can secure safety of workers by preventing a kick generated through a drilling hole in drilling related to oil and natural gas. To achieve the objective, the exploration drilling system for kick prevention comprises: a control pipe coupled to an upper portion of a drill pipe; and a stuffing box coupled to an upper portion of the control pipe.

Description

Kick-proof exploration drilling system {EXPLORATION DRILLING SYSTEM FOR PREVENTING KICK}

The present invention relates to a kick-proof exploration drilling system, and more particularly to a kick-proof exploration drilling system that can ensure the safety of workers by preventing the occurrence of kick through the borehole during drilling associated with oil or natural gas.

In general, exploration drilling refers to digging deep holes in the ground using boring machines for the purpose of exploring mineral resources, oil deposits, and the like.

Conventionally, in order to pressurize oil or gas during exploration drilling for exploration of petroleum or natural gas, work was performed by filling a drilling circulating water having sufficient specific gravity and viscosity into the drilling.

However, the exploration drilling for grasping the detailed strata is difficult to use the drilling circulating water having a high specific gravity and viscosity since the drilling core must be collected, and thus, a kick-proof exploration drilling system having a configuration as shown in FIG. 1 was used. .

1 is a perspective view illustrating a configuration in which a lubricator and a stuffing box are coupled to an upper end of a BOP in a conventional kick preventing exploration drilling system.

Referring to FIG. 1, a conventional kick preventing exploration drilling system includes a stuffing box 10, a lubricator 20, a gate valve 30, and a drill pipe. (Drill Pipe; 40), RAM BOP (Ram Blow Out Preventer) 50, Casing Head 60, and Wire 70.

During normal drilling operations where there is no hydrocarbon pressure in the borehole, both the ram BOP and the annular BOP remain in the open position.

If the drill bit penetrates through unexpected oil or natural gas pockets, the hydraulic fluid generated by the drilling mud prevents well fluid from entering the borehole.

If the drill bit penetrates the stratum containing hydrocarbons, and the hydraulic head created by the plume's column is insufficient to counter the stratum pressure, the drilling shunt is replaced by well fluid.

This can be confirmed by an increase in the amount of water returned to the water tank.

This situation is called kick and must be dealt with quickly before it is amplified to a full blow out.

The conventional kick-proof exploration drilling system repeatedly withdraws the core tube containing the drilling core through the drill pipe 40 using the wire 70 to recover the drilling core for the exploration drilling for detailed stratum grasp. Should be.

However, the exploration drilling for recovering such a drilling core has a structure in which the drilling circulation water in the drill pipe 40 must be discharged to the outside, and thus, when the drill pipe 40 is repeatedly opened until the drilling is completed and the core tube is lifted, the borehole Kick can occur due to internal pressure reduction, so the safety problem has been repeated repeatedly.

In order to solve this problem, the lubricator 20 and the gate valve 30 are connected and used to secure safety according to the risk of kicking, but the lubricator 20 which must secure the length of the core tube or more is required. Due to problems such as the basic structure of the) there was a problem that it is very difficult to apply to general exploration drilling.

Republic of Korea Patent Publication No. 10-2018-0045895 (published May 8, 2018)

An object of the present invention for solving the conventional problems as described above is to provide a kick-proof exploration drilling system that can ensure the safety of workers by preventing the occurrence of kick through the borehole during drilling associated with oil or natural gas.

In order to achieve the above object, the kick prevention exploration drilling system according to the present invention, the control pipe is coupled to the upper portion of the drill pipe; And a stuffing box coupled to an upper portion of the control tube.

In addition, in the anti-kick exploration drilling system according to the present invention, the control pipe, a vertical pipe; A ball valve connected to one side by an outer wall of the vertical pipe and a horizontal pipe; A check valve connected to the other side of the ball valve; And a pressure gauge mounted between the outer wall and the ball valve.

In addition, the kick-proof exploration drilling system according to the present invention, Ram Blow Out Preventer (BOP) coupled to the lower portion of the drill pipe; And a casing having a casing head on one side, wherein the casing head is coupled to the bottom of the RAM BOP.

In addition, the kick-proof exploration drilling system according to the present invention, characterized in that the hose is connected between the check valve and the inlet formed in the outer wall of the casing head.

In addition, the kick-proof exploration drilling system according to the present invention, the stuffing box, the control tube, the drill pipe, the ram BOP, the casing head is characterized in that the inside is penetrated so that the wire is inserted.

In addition, in the anti-kick exploration drilling system according to the present invention, the control pipe, characterized in that for controlling the pressure in the drill pipe to prevent the occurrence of kick (Kick) of the lifting core.

In addition, in the anti-kick exploration drilling system according to the present invention, the ball valve, the inlet of the drilling circulating water, gas or kick generating material flowing into the drill pipe during the lifting of the drilling core to the inlet through the hose. It is characterized by.

In addition, in the anti-kick exploration drilling system according to the present invention, the ball valve, characterized in that for controlling the drilling circulating water, the gas or the kick generating material flowing into the inlet to return between the drill pipe and the casing. do.

Specific details of other embodiments are included in "details for carrying out the invention" and the accompanying "drawings".

Advantages and / or features of the present invention and methods for achieving them will be apparent with reference to various embodiments described below in detail with the accompanying drawings.

However, the present invention is not limited to the configuration of each embodiment disclosed below, but may be implemented in a variety of different forms, each embodiment disclosed herein is to make the disclosure of the present invention complete, the present invention It is provided to fully inform the person skilled in the art the scope of the present invention, and it should be understood that the present invention is only defined by the scope of each claim of the claims.

According to the present invention, it is possible to prevent the occurrence of kick through the borehole during drilling related to oil or natural gas to ensure the safety of workers.

1 is a perspective view showing a configuration in which a lubricator and a stuffing box are coupled to a top of a BOP in a conventional anti-kick exploration drilling system.
Figure 2 is a perspective view showing a combined configuration of the control tube to prevent the kick between the BOP and the stuffing box in the anti-kick exploration drilling system according to the present invention.
Figure 3 is a perspective view showing the configuration of the control tube in the anti-kick exploration drilling system according to the present invention.

Before describing the present invention in detail, the terms or words used in the present specification should not be construed as being limited to ordinary or dictionary meanings, and in order for the inventor of the present invention to explain his invention in the best way. Concepts of various terms may be properly defined and used, and furthermore, it is to be understood that these terms or words should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention.

In other words, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting the teachings of the present invention. These terms are not intended to limit the scope of the invention. It should be understood that the term is defined in consideration.

In addition, in the present specification, the singular expressions may include the plural expressions unless the context clearly indicates otherwise, and the singular expressions may include the singular meanings even if the plural expressions are similar. .

Throughout this specification, when a component is described as "comprising" another component, the component may further include any other component rather than excluding any other component unless otherwise stated. It can mean that you can.

Furthermore, if a component is described as being "inside, or in connection with," another component, the component may be directly connected to or in contact with another component, The components may be spaced apart from each other, and in the case of spaced apart from each other, there may be a third component or means for fixing or connecting the components to other components. It should be understood that the description of the components or means of 3 may be omitted.

On the other hand, if a component is described as being "directly connected" or "directly connected" to another component, it should be understood that no third component or means exists.

Similarly, other expressions describing the relationship between each component, such as "between" and "immediately between", or "neighboring to" and "directly neighboring to", have the same purpose. Should be interpreted as

Also, in this specification, terms such as “one side”, “other side”, “one side”, “other side”, “first”, “second”, and the like, if used, refer to this one component for one component. It is used to clearly distinguish from other components, and it should be understood that such terms do not limit the meaning of the components.

In addition, terms related to positions such as “up”, “down”, “left”, “right”, etc., when used herein, should be understood to indicate relative positions in the corresponding drawings with respect to the corresponding components, if used. Unless an absolute position is specified with respect to these positions, these position related terms should not be understood as referring to an absolute position.

In addition, in the present specification, in designating the reference numerals for each component of each drawing, the same reference numerals refer to the same components so as to have the same reference numerals even though they are shown in different drawings, that is, the same reference numerals throughout the specification. The symbols indicate the same components.

In the accompanying drawings, the size, position, coupling relationship, etc. of each component constituting the present invention may be partially exaggerated or reduced or omitted in order to sufficiently convey the spirit of the present invention or for convenience of description. It may be described, so the proportion or scale may not be exact.

In addition, in the following, in describing the present invention, a detailed description of a configuration determined to unnecessarily obscure the subject matter of the present invention, for example, a known technology including the prior art, may be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a configuration coupled to the control tube to prevent the kick between the BOP and the stuffing box in the anti-kick exploration drilling system according to the present invention.

Referring to FIG. 2, the kick preventing exploration drilling system 1000 according to the present invention includes a stuffing box 100, a bypass adapter 200, a drill pipe 300, Ram BOP (Ram Blow Out Preventer) 400, casing 500, wire 600, and hose 700.

This will be described in more detail.

Stuffing box 100 is a device for preventing the leakage of steam or water in the place where the piston, plunger and the like.

In the present invention serves to prevent leakage of the drilling circulating water, gas and the like.

The control tube 200 serves to control the pressure in the drill pipe 300 to prevent the kick (kick) generation, it will be described later with reference to FIG.

Drill pipe 300 is a seamless tube used for drilling fluid circulation and bit rotation.

That is, the drill pipe 300 is hollow and seamless, and steel of excellent quality is used.

The length of the drill pipe 300 is connected by extending the length of the borehole.

RAM BOP 400 is a type of oil well explosion protector.

Blow out preventer (BOP) is the most important equipment related to the safety of workers when drilling oil or natural gas.

In other words, the BOP is the last line of defense that gives the drilling technician time to take corrective action or give up if the well is out of control.

When drilling is in progress, the time to destroy drilling equipment and even damage people is to penetrate the sand layer containing shallow gas.

The basic function of the BOP is to lock the well fluid in the drilling space to the outside.

The BOP system is composed of a BOP stack, a choke, a kill valve, a choke manifold, a hydraulically powered control unit, and the like.

There are basically two types of BOP: the annular type and the ram type.

The annular BOP has the structure of Reinforced Elastomeric Packing Element that seals the drill pipe.

In addition to suppressing borehole pressure, the annular type of BOP is used for stripping and snubbing operations in which the drill pipe and casing move vertically into or out of the well under oil well pressure.

The ram type BOP has a cutting edge capable of cutting the drill string and can suppress high pressure and high temperature well fluid in the borehole for a long time.

To control the kick, the drilling technician must close the ram BOP to trap the stratum pressure in the borehole.

The dense water is stabilized by pumping it into the well via a kill spool or a kill connection located above the ram BOP.

As a result, the oil well pressure is in a neutral state by circulating back to the choke manifold through the choke line.

After successfully killing the stratum pressure with Isu's hydraulic head, drilling can be resumed.

The casing 500 serves to keep the boreholes from collapsing while drilling the boreholes having a long depth.

The casing 500 connects a plurality of casings in proportion to the depth of the borehole.

Since the borehole has a deep depth, during the initial borehole drilling, the borehole is drilled with a larger radius, and thus the borehole with smaller and smaller radius is drilled. Accordingly, the size of the casing 500 is also smaller and smaller.

The wire 600 opens the drill pipe 300 to recover the drilling core and uses it to lift the core tube.

The hose 700 is used to return the drilling circulating water, gas or kick generating material flowing out into the drill pipe 300 back to the drill pipe 300, which will be described later with reference to FIG. 3. .

Anti-kick exploration drilling system 1000 according to the present invention is formed as follows.

The control tube 200 is coupled to the upper portion of the drill pipe 300, the stuffing box 100 is coupled to the upper portion of the control tube 200.

In addition, a ram BOP 400 is coupled to a lower portion of the drill pipe 300, and a casing 500 having a casing head 510 is coupled to a lower portion of the ram BOP 400.

The casing 500 is formed by combining the casing head 510 and the casing body 520.

The control tube 200 and the casing head 510 are connected to the hose 700.

That is, the kick preventing exploration drilling system 1000 according to the present invention includes a configuration in which the hose 700 is connected between the check valve 240 and the inlet formed in the outer wall of the casing head 510 of FIG.

Meanwhile, in the kick preventing exploration drilling system 1000 according to the present invention, the stuffing box 100, the control pipe 200, the drill pipe 300, the ram BOP 400, and the casing head 510 are The inside is penetrated to insert the wire 600.

Figure 3 is a perspective view showing the configuration of the control tube in the anti-kick exploration drilling system according to the present invention.

Referring to FIG. 3, in the anti-kick exploration drilling system 1000 according to the present invention, the control pipe 300 includes a vertical pipe 210, a pressure gauge 220, a ball valve 230, and a check valve 240. ).

The vertical tube 210 is formed in a hollow state.

The pressure gauge 220 is a measuring instrument used for measuring pressure.

The type of the pressure gauge 220 is various.

For example, a liquid column pressure gauge (a U-tube manometer, a two-liquid manometer, etc.) balances the pressure to be measured with a force of a liquid column such as water or mercury, and measures the pressure by the height of the column.

A deadweight standard pressure gauge balances the pressure over the piston with oil through a precisely finished cylinder.

An elastic pressure gauge (a Bourdon tube, a diaphragm type, etc.) measures a pressure by the amount of deformation of a hydraulic part using elastic bodies, such as a metal curved pipe, a diaphragm, a bellows, and a piston, in a hydraulic part.

Among the electric pressure gauges, the resistance wire strain gauge uses a change in resistance of the metal due to pressure, and the piezoelectric strain uses an electromotive force that is proportional to the pressure when a pressure is applied to a piece such as titanium titanate. Use a gauge.

Next, the ball valve 230 is a kind of coke that uses a simple check valve and a pump valve to close and expand the flow of the spherical rotating body by rotating the 90 °, and includes a metal rotating box, a ball and a corresponding synthetic rubber, It is a valve made of valve seats such as synthetic resin.

The check valve 240 is a valve in which fluid or gas flows in only one direction and blocks flow in the other direction, also called a check valve.

For example, when steam of fuel generated in a fuel tank flows into a canister, it is used to obtain a flow in one direction.

In addition, in a master vac for a brake, it is also used to ensure negative pressure with air flowing in one direction.

In addition, it is used also for a radiator cap.

It is generally composed of a spring and a ball or a spring and a rod-shaped valve body.

Look at the coupling relationship between the components of the control tube 200 as described above.

The control pipe 200 includes a vertical pipe 210, a ball valve 230 connected to one side by an outer wall of the vertical pipe 210, and a horizontal pipe, and a check valve 240 connected to the other side of the ball valve 230. And a pressure gauge 220 mounted between the outer wall of the vertical pipe 210 and the ball valve 230.

Such a control pipe 200 controls the pressure that can prevent the occurrence of kick during lifting of the drilling core.

For example, the drilling technician checks the pressure of the drilling circulating water, the gas, the kick generating material, etc., which flows into the drill pipe 300 through the pressure gauge 220 of the control tube 200, and checks the ball valve 230. To control the pressure.

By such a ball valve 230, in the anti-kick exploration drilling system 1000 according to the present invention, the ball valve 230, the drilling circulating water, gas or the like flowing out into the drill pipe 300 during the lifting of the drilling core The kick generating material is introduced into the inlet of the casing head 510 through the hose 700 described with reference to FIG. 2.

As a result, the ball valve 230 controls the drilling circulating water, the gas, or the kick generating material introduced into the inlet of the casing head 510 to be returned between the drill pipe and the casing.

The anti-kick exploration drilling system 1000 according to the present invention further includes a control pipe 200 capable of suppressing kicking between the drill pipe 300 and the stuffing box 100, and the control pipe 200. By controlling the pressure caused by the kick occurs it is possible to ensure the safety of the workers.

The vertical pipe 210 of the control pipe 200 is connected to the drill pipe 300 by screwing.

The control pipe 200 of the anti-kick exploration drilling system 1000 according to the present invention may be used instead of a lubricator, or may be used together with a lubricator.

As such, according to the anti-kick exploration drilling system 1000 according to the present invention there is an effect that can prevent the occurrence of kick through the borehole during drilling associated with oil or natural gas to ensure the safety of the workers.

As mentioned above, various exemplary embodiments of the present invention have been described with reference to some examples, but the descriptions of various exemplary embodiments described in the detailed description of the present invention are merely exemplary, and the present invention is only illustrative. Those skilled in the art will understand from the above description that the present invention can be variously modified or implemented in accordance with the present invention.

In addition, the present invention is not limited by the above description because it can be implemented in a variety of other forms, the above description is intended to complete the disclosure of the present invention is usually in the technical field to which the present invention belongs It should be understood that the present invention is provided only to fully convey the scope of the present invention to those skilled in the art, and the present invention is defined only by the claims of the claims.

100: stuffing box
200: control tube
210: outer wall
220: pressure gauge
230: Ball Valve
240: check valve
300: drill pipe
400: RAM BOP
500 casing
510: Casing Head
520: casing body
600: wire
700: Hose
1000: Kick Resistant Exploration Drilling System

Claims (8)

A control tube coupled to the upper portion of the drill pipe; And
A stuffing box coupled to an upper portion of the control tube;
The control tube,
Vertical tube;
A ball valve connected to one side by an outer wall of the vertical pipe and a horizontal pipe;
A check valve connected to the other side of the ball valve; And
And a pressure gauge mounted between the outer wall and the ball valve.
Ram Blow Out Preventer (BOP) coupled to the bottom of the drill pipe; And
It further comprises a casing having a casing head on one side,
The casing head is coupled to the bottom of the ram BOP,
A hose is connected between the check valve and the inlet formed in the outer wall of the casing head,
The control tube,
Repeatedly opening the drill pipe to prevent kicking during lifting of the drilling core and controlling the pressure in the drill pipe to prevent kicking when lifting the core tube through the wire,
The ball valve,
Characterized in that the drilling circulating water, gas or kick generating material flowing into the drill pipe when the drilling core is lifted into the inlet through the hose,
Kick-proof exploration drilling system.
delete delete delete The method of claim 1,
The stuffing box, the control pipe, the drill pipe, the ram BOP, and the casing head is characterized in that the inside penetrates so that the wire is inserted,
Kick-proof exploration drilling system.
delete delete The method of claim 1,
The ball valve,
Characterized in that the drilling circulating water, the gas or the kick generating material introduced into the inlet is controlled to return between the drill pipe and the casing,
Kick-proof exploration drilling system.

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