CN209942779U - Check valve opening control mechanism of pressure maintaining rope coring drilling tool - Google Patents

Check valve opening control mechanism of pressure maintaining rope coring drilling tool Download PDF

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Publication number
CN209942779U
CN209942779U CN201920503655.9U CN201920503655U CN209942779U CN 209942779 U CN209942779 U CN 209942779U CN 201920503655 U CN201920503655 U CN 201920503655U CN 209942779 U CN209942779 U CN 209942779U
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China
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cam
way valve
mandrel
card
elastic
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CN201920503655.9U
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Chinese (zh)
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王佳亮
万步炎
黄筱军
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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Abstract

The utility model discloses a check valve opening control mechanism of a pressure maintaining rope core drill, which comprises a spearhead, an elastic clip component, a clip receiving cylinder, a cross rod, a lifting rod, a cam, an elastic clip bracket, a check valve and a mandrel; the spearhead is connected with the card receiving barrel; the elastic clamp component is in pin joint in the elastic clamp bracket; the lower part of the card collecting cylinder is provided with a cross bar, the upper part of a lifting rod is hung on the cross bar, the lower part of the lifting rod is hinged with a cam, the cam is hinged with a card ejecting support, and the lower end of the cam is provided with a powerful magnetic block; the lower end of the elastic clamp bracket is connected with the upper end of the mandrel; the one-way valve hole is arranged at the top of the mandrel along the axial direction of the mandrel and communicated with the central hole of the mandrel, and the one-way valve hole is positioned under the cam; a one-way valve core is arranged in the one-way valve hole, and a powerful magnetic ring is arranged at the upper part of the one-way valve core. The utility model discloses when realizing drilling tool pressurize function, thereby can reduce and salvage the inner tube in-process because the unable normal back that contracts of bullet card causes the card to bore the accident and lead to retrieving the risk of failure, satisfy the requirement of high-efficient probing.

Description

Check valve opening control mechanism of pressure maintaining rope coring drilling tool
Technical Field
The utility model relates to a rope coring drilling tool is used in the probing, especially relates to a check valve of pressurize rope coring drilling tool opens control mechanism.
Background
Deep sea natural gas hydrate development and utilization become a new hot spot of future resource strategy of countries in the world. Drill coring is the most straightforward method of obtaining gas hydrate samples. Because the natural gas hydrate is formed and exists in a low-temperature high-pressure environment, the pressure-maintaining sampling technology is mainly adopted at home and abroad to carry out the sampling work of the natural gas hydrate. The existing small-caliber pressure maintaining rope coring drilling tool mainly aims at the sampling working condition of a submarine drilling machine. At present, in the scheme of the rope coring pressure maintaining and coring drilling tool which is disclosed, the sealing and the opening of the lower end part of the drilling tool are realized by matching a pressure maintaining cap with a pressure maintaining cap unscrewing device on a submarine drilling machine body. Before drilling begins, the pressure maintaining cap at the lower end part of the inner pipe assembly is unscrewed and placed on the drilling machine by means of a mechanical arm and a pressure maintaining cap screwing and disassembling device on the drilling machine to realize the opening of the lower end part, and after drilling is finished, the inner pipe assembly is lifted to the drilling machine body and then the pressure maintaining cap screwing and disassembling device is used for screwing the pressure maintaining cap to the lower end part of the inner pipe assembly to realize the sealing of the lower end part. The sealing and opening of the upper end part of the drilling tool are mainly realized by the mutual matching of a hook arranged on the elastic clamp bracket and the one-way valve core. When the card receiving cylinder moves up for a certain distance in the normal working process, the card receiving cylinder generates a constraint force on the hook by utilizing the size of the inner wall of the card receiving cylinder to force the hook to rotate for a certain angle, so that the hook is in contact with the one-way valve core to enable the one-way valve core to overcome the spring force to be in an open state. The prior art scheme is to realize opening by rigid contact of a hook and a valve core. The rotation angle of the hook is limited due to the limitation of the size of the inner diameter of the card receiving cylinder, the movement displacement stroke of the one-way valve core correspondingly converted by the rotation angle is short, and the opening amount of the valve core is difficult to freely adjust according to the drilling condition; when the sand is blocked or the shifting hook and the one-way valve core are worn and failed mutually, the shifting hook operation flexibility is easy to reduce, the normal folding and unfolding of the elastic clamping component are influenced, and the fishing failure risk exists; receive structural space's restriction influence, for obtaining the movement displacement stroke of colluding turned angle in order to increase the case as far as possible, prior art scheme takes the vertical overall arrangement mode of check valve, and this overall arrangement form has changed the flow direction of flush fluid, and the unobstructed production of rivers to flush fluid in the inner tube influences, has increased stereoplasm mud bits and coarse grain rock dust and has caused the risk of check valve inefficacy that resets at the check valve intracavity enrichment. Although the axial layout mode of the one-way valve can reduce the occurrence probability of the risks, the prior art scheme is limited by the rotating angle of the hook, and the axial layout mode of the hook has small opening displacement stroke on the one-way valve core, thereby affecting the working reliability.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a simple structure, reliability are high, and are applicable to the check valve of pressurize rope coring drilling tool and open control mechanism.
The utility model adopts the technical proposal that: a check valve opening control mechanism of a pressure maintaining rope core drill comprises a spearhead, an elastic clamping component, a clamping receiving barrel, a cross rod, a lifting rod, an elastic clamping support, a powerful magnetic block, a check valve core, a powerful magnetic ring, a check valve cover and a mandrel; the spearhead is connected with the card receiving barrel; the elastic clamp component is in pin joint in the elastic clamp bracket; the card receiving cylinder is connected with the elastic card component by a pin; the upper part of the mandrel is provided with a one-way valve cover; the lower part of the elastic clamp bracket is connected with the mandrel; the method is characterized in that: the lower part of the card collecting cylinder is provided with a cross bar, the upper part of a lifting rod is hung on the cross bar, the lower end of the lifting rod is hinged with a cam, the cam is hinged on the elastic card bracket, the lower end of the cam is provided with a powerful magnetic block, and the connecting lines between the lifting rod and a cam hinged pair, the cam and the elastic card bracket hinged pair and the powerful magnetic block are triangular; the upper end of the mandrel is connected with the lower end of the elastic clamp support, the one-way valve hole is formed in the top of the mandrel along the axial direction of the mandrel and communicated with the central hole of the mandrel, and the one-way valve hole is located right below the cam; a one-way valve core is arranged in the one-way valve hole, a powerful magnetic ring is arranged on the upper portion of the one-way valve core, the lifting rod can drive the cam to rotate, the powerful magnetic block at the lower end of the cam is close to or far away from the powerful magnetic ring, and the opening or closing of the one-way valve is achieved.
In the check valve opening control mechanism of the pressure maintaining rope core drill, the lower end face of the elastic clamp support is provided with the nonmetal pressing sleeve, the nonmetal pressing sleeve is positioned under the cam, and the powerful magnetic ring is positioned in the nonmetal pressing sleeve.
In the one-way valve opening control mechanism suitable for the pressure maintaining rope core drill, the direction of the magnetic pole of the powerful magnetic block at the lower end of the cam is the same as that of the powerful magnetic ring at the upper part of the one-way valve.
In the check valve opening control mechanism suitable for the pressure maintaining rope core drill, the card collecting barrel and the card ejecting bracket are demagnetized.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses simple structure, what it utilized is that magnetic material like poles repel's principle realizes opening of one-way valve core in the course of the work, is the mode of opening of a non-rigid contact, thereby it can adjust the free adjustment of the realization degree of opening to one-way valve core to magnetic force size through the mode of magnetic material lectotype. And conventional shift fork and case are the opening mode of rigid contact, and the case is opened the displacement and is mainly influenced by shift fork turned angle, and owing to receive the restriction of card receiving section of thick bamboo inner wall size, shift fork pivoted angle is limited, and it is less to correspond to produce the displacement stroke of opening, is difficult to adjust the degree of opening of case. The utility model discloses the complex mode that utilizes horizontal pole and pull rod can obtain the biggest cam turned angle in the limited motion stroke of a receipts card section of thick bamboo, and can avoid hindering the risk because the card that silt caused has improved mechanism operational reliability, has reduced the risk of the unable normal shrink of bullet card simultaneously. And conventional rigid contact opening mode utilizes a card receiving barrel inner wall to limit a shifting fork, forces the shifting fork to rotate, and the shifting fork is easy to move flexibly when meeting silt blocking or rigid part mutual abrasion failure in the working process, so that an elastic clamping component cannot shrink normally, and the risk of fishing failure is caused. The utility model discloses an utilize magnetic force to realize opening of one-way valve core, the size of its case motion displacement mainly depends on the size of magnetic force, rather than shift fork rotation produced displacement size. Therefore, the utility model discloses be favorable to realizing arranging the check valve along the axial direction of dabber to do not change flush fluid water route direction, ensure the normal circulation of flush fluid, reduce stereoplasm granule and float mud and cause the probability that the check valve resets inefficacy in the downthehole enrichment of check valve.
Drawings
Fig. 1 is a schematic structural diagram of the working state of the present invention.
In the figure: 1-spearhead fishing; 2-elastic cylindrical pins; 3-a cartridge chamber; 4-a snap assembly; 5-elastic cylindrical pins; 6-a cross bar; 7-lifting the pull rod; 8-cylindrical pins; 9-cylindrical pin; 10-card collecting cylinder; 11-a cam; 12-powerful magnetic block; 13-a snap bracket; 14-nonmetal pressing sleeve; 15-strong magnetic ring; 16-one-way valve cover; 17-one-way valve core; 18-mandrel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses a drag for spearhead 1, bullet card subassembly 4, receive a card section of thick bamboo 10, horizontal pole 6, lifting rod 7, cam 11, bullet card support 13, powerful magnetic path 12, nonmetal pressure cover 14, one-way valve core 17, powerful magnetic ring 15, one-way valve gap 16, dabber 18. The spearhead 1 is connected with the card receiving barrel 10; the elastic clamping component 4 is arranged in the elastic clamping support 13, the lower part of the elastic clamping component 4 is connected with the elastic clamping support 13 through an elastic cylindrical pin 5, and the upper part of the elastic clamping component 4 is connected with the card collecting barrel 10 through an elastic cylindrical pin 2; the lower part of the card receiving cylinder 10 is provided with a cross bar 6. The upper part of the lifting rod 7 is hung on the cross rod 6 and can slide on the cross rod 6, the lower part of the lifting rod 7 is hinged with the cam 11 through the solid pin 8, and the cam 11 is hinged with the elastic clamp support 13 through the solid pin 9; the lower end of the cam 11 is provided with a powerful magnetic block 12, and the lower end face of the elastic clamp bracket 13 is provided with a nonmetal pressing sleeve 14; the connecting lines between the lifting rod 7 and the cam 11 hinge pair, between the cam 11 and the spring clamp support 13 hinge pair and between the powerful magnetic blocks 12 are triangular. The one-way valve hole is arranged at the top of the mandrel along the axial direction of the mandrel 18 and communicated with a central hole of the mandrel 18, and the one-way valve hole is positioned under the cam 11. A one-way valve core 17 is arranged in the one-way valve hole, and a spring is arranged between the bottom of the one-way valve core 17 and the bottom of the one-way valve hole. A one-way valve cover 16 is arranged in the one-way valve hole and can limit and seal a one-way valve core 17; the upper part of the one-way valve core 17 penetrates through the one-way valve cover 16, the upper part of the one-way valve core 17 is provided with a strong magnetic ring 15, and the strong magnetic ring 15 is arranged in the non-metal pressing sleeve 14. The lower end of the card ejecting holder 13 is connected to the spindle 18. The strong magnetic block 12 at the lower end of the cam 11 has the same magnetic pole as the strong magnetic ring 15 at the upper part of the one-way valve core 17. The card receiving cylinder 10 and the card ejecting bracket 12 are demagnetized.
The utility model discloses a concrete application method as follows: the inner pipe assembly is placed at the bottom of a hole by grabbing the pressure maintaining inner pipe assembly on the drilling tool disc by a drilling machine manipulator and unscrewing a pressure maintaining cap at the lower part of the inner pipe assembly by a pressure maintaining cap screwing and unscrewing device, wherein the pressure maintaining cap is stored in the screwing and unscrewing device on the drilling machine body. During normal drilling, the elastic clamping component 4 is radially restricted by the elastic clamping chamber 3 in the outer pipe assembly, so that the card receiving cylinder 10 moves upwards along the axial direction, the cross rod 6 assembled on the card receiving cylinder 10 drives the lifting rod 7 to move along the axial direction, so that the cam 11 rotates around the cylindrical pin 9, and the powerful magnetic block 12 at the lower end of the cam 11 is opposite to the powerful magnetic ring 15 on the one-way valve core 17. Because the magnetic poles of the powerful magnetic block 12 and the powerful magnetic ring 15 are the same, mutually repulsive magnetic force is generated. Under the action of magnetic force, the one-way valve core 17 is in an open state against the action of spring force, so that water in the inner pipe can be discharged smoothly in the working process, and a water flow passage is formed.
After drilling is finished, the inner pipe assembly is quickly lifted to a hole opening by using a fishing mechanism, radial restraint of the elastic clamping component 4 by the elastic clamping chamber 3 is released, the card collecting barrel 10 moves downwards to a shoulder of the elastic clamping support 13 along the axial direction, the cross rod 6 linked with the card collecting barrel 10 drives the lifting rod 7 to move downwards along the axial direction, the cam 11 rotates around the cylindrical pin 9, so that the strong magnetic block 12 assembled on the cam 11 deflects by an angle which is not right opposite to the strong magnetic ring 15 on the one-way valve core 17, and the one-way valve core 17 resets under the action of spring elasticity at the moment, thereby realizing the upper end sealing of the drilling tool. And then the pressure maintaining cap screwing and unscrewing device is utilized, and the cap screwing operation of the pressure maintaining cap at the lower end part of the drilling tool is completed by means of a mechanical arm on the drilling machine, so that the sealing of the lower end part of the drilling tool is completed.

Claims (4)

1. A check valve opening control mechanism of a pressure maintaining rope core drill comprises a spearhead, an elastic clamping component, a clamping receiving barrel, a cross rod, a lifting rod, an elastic clamping support, a powerful magnetic block, a check valve core, a powerful magnetic ring, a check valve cover and a mandrel; the spearhead is connected with the card receiving barrel; the elastic clamp component is in pin joint in the elastic clamp bracket; the card receiving cylinder is connected with the elastic card component by a pin; the upper part of the mandrel is provided with a one-way valve cover; the lower part of the elastic clamp bracket is connected with the mandrel; the method is characterized in that: the lower part of the card collecting cylinder is provided with a cross bar, the upper part of a lifting rod is hung on the cross bar, the lower end of the lifting rod is hinged with a cam, the cam is hinged on the elastic card bracket, the lower end of the cam is provided with a powerful magnetic block, and the connecting lines between the lifting rod and a cam hinged pair, the cam and the elastic card bracket hinged pair and the powerful magnetic block are triangular; the upper end of the mandrel is connected with the lower end of the elastic clamp support, the one-way valve hole is formed in the top of the mandrel along the axial direction of the mandrel and communicated with the central hole of the mandrel, and the one-way valve hole is located right below the cam; a one-way valve core is arranged in the one-way valve hole, a powerful magnetic ring is arranged on the upper portion of the one-way valve core, the lifting rod can drive the cam to rotate, the powerful magnetic block at the lower end of the cam is close to or far away from the powerful magnetic ring, and the opening or closing of the one-way valve is achieved.
2. The check valve opening control mechanism of a dwell wireline coring tool as set forth in claim 1, wherein: the lower end face of the elastic clamp support is provided with a nonmetal pressing sleeve, the nonmetal pressing sleeve is located under the cam, and the powerful magnetic ring is located in the nonmetal pressing sleeve.
3. The check valve opening control mechanism of a dwell wireline coring tool as set forth in claim 1, wherein: the strong magnetic block at the lower end of the cam has the same magnetic pole direction with the strong magnetic ring at the upper part of the one-way valve.
4. The check valve opening control mechanism of a dwell wireline coring tool as set forth in claim 1, wherein: the card receiving cylinder and the card ejecting bracket are demagnetized.
CN201920503655.9U 2019-04-15 2019-04-15 Check valve opening control mechanism of pressure maintaining rope coring drilling tool Active CN209942779U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920503655.9U CN209942779U (en) 2019-04-15 2019-04-15 Check valve opening control mechanism of pressure maintaining rope coring drilling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920503655.9U CN209942779U (en) 2019-04-15 2019-04-15 Check valve opening control mechanism of pressure maintaining rope coring drilling tool

Publications (1)

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CN209942779U true CN209942779U (en) 2020-01-14

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112031688A (en) * 2020-09-16 2020-12-04 中国地质大学(武汉) Pressure-maintaining coring drilling tool for natural gas hydrate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112031688A (en) * 2020-09-16 2020-12-04 中国地质大学(武汉) Pressure-maintaining coring drilling tool for natural gas hydrate
CN112031688B (en) * 2020-09-16 2021-08-17 中国地质大学(武汉) Pressure-maintaining coring drilling tool for natural gas hydrate

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