CN219509590U - Automatic hydraulic stretching drilling tool for exploiting ocean hydrates - Google Patents

Abstract

The utility model discloses an automatic hydraulic stretching drilling tool for exploiting ocean hydrates, which comprises a drill bit and a double-wall drilling rod, wherein the drill bit is fixedly connected with the bottom of the double-wall drilling rod, a plurality of small holes are formed in the joint of the drill bit and the double-wall drilling rod, a central channel and a high-pressure jet water conveying channel are formed in the double-wall drilling rod, a plurality of first drainage tubes are fixedly inserted into the inner wall of the high-pressure jet water conveying channel, a high-pressure hose is fixedly sleeved at one end of the first drainage tube, which is far away from the double-wall drilling rod, and a jet pipe is fixedly inserted at one end of the high-pressure hose, which is far away from the first drainage tube. According to the utility model, through the arrangement of the transmission connection structure, the jet pipe can be automatically unfolded under the thrust action of high-pressure water, so that the jet distance of the water jet can be effectively increased, the acting force of the high-pressure water jet on the hydrate reservoir is ensured, and the exploitation efficiency of the hydrate is effectively improved.

Description

Automatic hydraulic stretching drilling tool for exploiting ocean hydrates

Technical Field

The utility model relates to the technical field of ocean drilling, in particular to an automatic hydraulic stretching drilling tool for exploiting ocean hydrates.

Background

Natural gas hydrate, also called combustible ice, is a crystalline substance formed by natural gas (mainly methane) and water under high pressure and low temperature conditions, and is also called "solid gas" and "gas ice". Natural gas hydrates have been found to be predominantly present in subsea sediment.

Existing natural gas hydrate recovery methods: depressurization mining method, thermally activated mining method, chemical reagent injection mining method, and solid mining method (water jet mining is one of the solid mining methods). The water jet exploitation has the advantages of high energy utilization rate, no pollution, good heat dissipation effect and the like. The development and the demand of a drilling tool for natural gas hydrate water jet exploitation are urgent. A single action rotary sampling drilling tool for marine gas hydrate exploration disclosed in prior patent CN106257265a is provided with a rotary nozzle cylinder to enable high pressure jet water to rotationally cut a hydrate formation by forming a rotary high pressure low temperature jet.

But has the following problems: the nozzle is fixed on the single-acting mechanism, the nozzle can not extend to and approach the hydrate reservoir in the working process, the water jet injection distance is limited, and particularly under the condition of submerged sea bottom, the acting force of high-pressure water jet on the hydrate reservoir is greatly weakened, so that the hydrate exploitation efficiency is seriously reduced.

Disclosure of Invention

The utility model aims to solve the problems that in the prior art, a nozzle is fixed on a single-acting mechanism, the nozzle cannot extend and approach to a hydrate reservoir in the working process, the jet distance of a water jet is limited, and particularly the acting force of high-pressure water jet on the hydrate reservoir is greatly weakened under the condition of submerged sea bottom, and provides an automatic hydraulic extension drilling tool for exploiting ocean hydrates.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides an automatic hydraulic stretching drilling tool for exploiting ocean hydrate, includes drill bit and double-walled drilling rod, the bottom fixed connection of drill bit and double-walled drilling rod, the junction of drill bit and double-walled drilling rod is equipped with a plurality of apertures, the inside central passageway and the high-pressure jet water delivery channel of being equipped with of double-walled drilling rod, fixedly on the inner wall of high-pressure jet water delivery channel insert and be equipped with a plurality of first drainage tubes, the one end that the double-walled drilling rod was kept away from to first drainage tube is fixed to have cup jointed the high-pressure hose, the one end that the first drainage tube was kept away from to the high-pressure hose is fixed to be inserted and is equipped with the jet pipe, fixedly to insert in the high-pressure jet water delivery channel has the second drainage tube that corresponds with first drainage tube, the slip has the slider in the second drainage tube, be connected through the connecting rod between slider and the jet pipe, the both ends of connecting rod rotate with jet pipe and slider through first hinge and second hinge respectively.

Preferably, the first drainage tube and the inner wall of the high-pressure jet water conveying channel are arranged at 90 degrees.

Preferably, the first drainage tube and the second drainage tube are made of the same material as the double-wall drill rod.

Preferably, both ends of the high-pressure hose are fixedly sleeved with fixing rings.

Preferably, the outer part of the sliding block is fixedly sleeved with a sealing ring, and the edge of the sealing ring is contacted with the inner wall of the second drainage tube.

Preferably, one end of the second drainage tube, which is close to the jet tube, is provided with a limiting clamping groove corresponding to the sliding block.

The beneficial effects are that:

according to the utility model, through the arrangement of the transmission connection structure, the jet pipe can be automatically unfolded under the thrust action of high-pressure water, so that the jet distance of the water jet can be effectively increased, the acting force of the high-pressure water jet on the hydrate reservoir is ensured, and the exploitation efficiency of the hydrate is effectively improved.

Drawings

FIG. 1 is a schematic view of an automatic hydraulic expansion drilling tool for producing marine hydrates according to the present utility model;

fig. 2 is a schematic diagram of an automatic hydraulic expansion drilling tool for producing marine hydrates according to the present utility model in operation.

In the figure: 1 high-pressure hose, 2 fixed ring, 3 jet pipe, 4 first drainage tube, 5 first hinge, 6 connecting rod, 7 second hinge, 8 second drainage tube, 9 slider, 10 sealing washer, 11 high-pressure jet water conveying channel, 12 drill bit, 13 double-wall drilling rod, 14 central channel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-2, an automatic hydraulic stretching drilling tool for exploiting ocean hydrates comprises a drill bit 12 and a double-wall drill rod 13, wherein the drill bit 12 is fixedly connected with the bottom of the double-wall drill rod 13, a plurality of small holes are formed in the joint of the drill bit 12 and the double-wall drill rod 13, high-pressure jet water can flow out to cool the drill bit 12, and a central channel 14 and a high-pressure jet water conveying channel 11 are formed in the double-wall drill rod 13;

in this embodiment, a plurality of first drainage tubes 4 are fixedly inserted into the inner wall of the high-pressure jet water conveying channel 11, and are used for guiding high-pressure jet water into the jet pipe 3, and the first drainage tubes 4 and the inner wall of the high-pressure jet water conveying channel 11 are arranged at 90 degrees;

in the embodiment, one end of the first drainage tube 4, which is far away from the double-wall drill rod 13, is fixedly sleeved with a high-pressure hose 1 so that the jet tube 3 is unfolded, both ends of the high-pressure hose 1 are fixedly sleeved with a fixed ring 2, the tightness of both ends of the high-pressure hose 1 is ensured, and one end of the high-pressure hose 1, which is far away from the first drainage tube 4, is fixedly inserted with the jet tube 3 for jetting high-pressure jet water to cut a natural gas hydrate stratum;

in the embodiment, a second drainage tube 8 corresponding to the first drainage tube 4 is fixedly inserted in the high-pressure jet water conveying channel 11 and used for arranging a sliding block 9, and the first drainage tube 4 and the second drainage tube 8 are made of the same material as a double-wall drill rod 13;

in the embodiment, a sliding block 9 is slid in the second drainage tube 8, the sliding block 9 is connected with the jet tube 3 through a connecting rod 6 and is used for driving the jet tube 3 to be unfolded, a sealing ring 10 is fixedly sleeved outside the sliding block 9, the edge of the sealing ring 10 is contacted with the inner wall of the second drainage tube 8, and the tightness between the sliding block 9 and the inner wall of the second drainage tube 8 is ensured;

in this embodiment, a limiting slot corresponding to the slide block 9 is arranged at one end of the second drainage tube 8 close to the jet tube 3, and two ends of the connecting rod 6 are respectively connected with the jet tube 3 and the slide block 9 in a rotating manner through the first hinge 5 and the second hinge 7.

In the embodiment, when high-pressure jet water is injected and sequentially passes through the first drainage tube 4, the high-pressure hose 1 and finally is sprayed out of the jet tube 3 to cut a natural gas hydrate stratum; at the same time, high-pressure jet water is injected into the second drainage tube 8, and the pressure of the high-pressure water acts on the sliding block 9 to push the sliding block 9 to move upwards in the second drainage tube 8. The thrust is sequentially transmitted to the second hinge 7, the connecting rod 6 and the first hinge 5 which are connected with the sliding block 9, and the first hinge 5 pushes the jet pipe 3 to be stretched out so as to achieve the purpose of increasing the jet distance. In addition, small holes are arranged at the joint of the double-wall drill rod 13 and the drill bit 12, so that high-pressure jet water can flow out to cool the drill bit 12. Finally, the rock mass storing the natural gas enters reverse circulation along with jet water, and is recovered to the ground, but not in a working state, and the jet pipe 3 is automatically recovered under the action of gravity.

In this embodiment, through the setting of transmission connection structure, make jet pipe 3 can be under the thrust effect of high-pressure water, automatic expansion can effectively promote the jet distance of water jet, guarantees the effort of high-pressure water jet to the hydrate reservoir, and has effectively promoted the exploitation efficiency of hydrate.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (6)

1. An automatic hydraulic expansion drilling tool for exploiting sea hydrates, comprising a drill bit (12) and a double-walled drill rod (13), characterized in that: drill bit (12) and the bottom fixed connection of double-walled drilling rod (13), the junction of drill bit (12) and double-walled drilling rod (13) is equipped with a plurality of apertures, inside central passageway (14) and the high-pressure jet water delivery channel (11) of being equipped with of double-walled drilling rod (13), fixedly on the inner wall of high-pressure jet water delivery channel (11) insert and be equipped with a plurality of first drainage tubes (4), the one end that double-walled drilling rod (13) was kept away from to first drainage tube (4) is fixed to have cup jointed high-pressure hose (1), the one end that first drainage tube (4) was kept away from to high-pressure hose (1) is fixed to be inserted and is equipped with jet pipe (3), the second drainage tube (8) that corresponds with first drainage tube (4) are inserted to high-pressure jet water delivery channel (11) internal fixation, the slip has slider (9) in second drainage tube (8), be connected through connecting rod (6) between slider (9) and jet pipe (3), the both ends of connecting rod (6) are connected with slider (3) through first hinge (5) and second hinge (7) and rotation respectively.

2. An automated hydraulic expansion drilling device for producing marine hydrates as recited in claim 1, wherein: the first drainage tube (4) and the inner wall of the high-pressure jet water conveying channel (11) are arranged at 90 degrees.

3. An automated hydraulic expansion drilling device for producing marine hydrates as recited in claim 1, wherein: the first drainage tube (4) and the second drainage tube (8) are made of the same material as the double-wall drill rod (13).

4. An automated hydraulic expansion drilling device for producing marine hydrates as recited in claim 1, wherein: the two ends of the high-pressure hose (1) are fixedly sleeved with fixing rings (2).

5. An automated hydraulic expansion drilling device for producing marine hydrates as recited in claim 1, wherein: the outside of slider (9) is fixed to be cup jointed sealing washer (10), the edge of sealing washer (10) contacts with the inner wall of second drainage tube (8).

6. An automated hydraulic expansion drilling device for producing marine hydrates as recited in claim 1, wherein: one end of the second drainage tube (8) close to the jet tube (3) is provided with a limit clamping groove corresponding to the sliding block (9).