CN111749629A

CN111749629A - Novel hydraulic chuck

Info

Publication number: CN111749629A
Application number: CN202010800602.0A
Authority: CN
Inventors: 王展鹏; 王钦峰
Original assignee: Jiangsu Rudong Lianfeng Petroleum Machinery Co ltd
Current assignee: Jiangsu Rudong Lianfeng Petroleum Machinery Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2020-10-09

Abstract

The invention discloses a novel hydraulic chuck, which comprises an upper cover, a valve, a shell, a hydraulic system and a slip, wherein the valve is connected with the shell, the slip is arranged on the inner sides of the valve and the shell, the upper cover is arranged above the shell, a slide rail for guiding the slip to ascend or descend is fixed in the shell, a balance rod matched with the slide rail is arranged on the slip, a hydraulic cylinder for driving the slip to ascend or descend is arranged in the shell, a push rod is axially arranged in the shell, one end of the push rod is fixedly connected with a travel switch, and the other end of the push rod extends out of the shell so as to be mutually contacted in the process of descending the slip. The invention has compact structure, safety, reliability, large load and good torque resistance effect.

Description

Novel hydraulic chuck

Technical Field

The invention relates to the technical field of petroleum drilling, in particular to a novel hydraulic chuck.

Background

In the process of oil drilling, an oil casing or a drill pipe is clamped through a hydraulic elevator or a chuck, the elevator is generally suspended above a second-layer platform of a drilling machine, and the chuck is placed below the platform. The traditional chuck is easy to strain the back of a worker when the slips are manually operated, so that the labor intensity is high and the working efficiency is low; meanwhile, the chuck has no function of righting the pipe column, and the pipe column is easy to be stressed unevenly.

In addition, the slips inside the spider are clamped or unclamped from the pipe string, and the slips are in place in the spider shell, so that a person on the console cannot know immediately without signal indication, and the operator needs to confirm the slips by eyes, but the process of confirming the slips by eyes is troublesome and unsafe. Once the operation is wrong, serious production accidents can be caused.

Disclosure of Invention

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a novel hydraulic chuck, includes upper cover, valve, casing, hydraulic system and slips, the valve is connected with the casing, the slips sets up the inboard at valve and casing, the casing top is equipped with the upper cover, the casing is inside to be fixed with the slide rail that leads for the slips rises or descends, be equipped with on the slips with slide rail complex balancing pole, be equipped with the hydraulic cylinder that drives the slips and rise or descend in the casing, the casing internal shaft is provided with the ejector pin, the one end fixedly connected with travel switch of ejector pin, the other end of ejector pin stretches out the casing so that touch each other at the in-process that the slips descends.

According to a preferable technical scheme, the upper cover is divided into a left cover and a right cover, the upper cover is installed above the shell through a bracket type valve block, a centering block is arranged on the inner side of the upper cover, and a rotating arm used for rotating the centering block is arranged between the upper cover and the centering block.

Preferably, the bracket type valve block is hinged with the upper cover through a hinge pin, the upper hydraulic cylinder is mounted on the upper cover through a hydraulic cylinder mounting plate, and the rotating arm is mounted on the inner side of the upper cover through a pin.

As a preferable technical scheme, an upper hydraulic cylinder for driving the centering block is arranged on the upper cover.

As a preferred technical scheme, slip in-place indicating valves are arranged on two sides of the shell.

As a preferable technical scheme, a tooth plate sleeve used for adapting to the pipe column is arranged in the slip or a tooth plate groove used for adapting to the pipe column is arranged on the slip.

As a preferred technical scheme, the slips are three-piece slips.

As a preferred technical scheme, the left hydraulic cylinder and the right hydraulic cylinder are both gear-rack type hydraulic cylinders.

As a preferred technical scheme, the slips fall into the sliding rail to prevent rotation.

The invention has the beneficial effects that:

1. the invention has compact structure, safety, reliability and large load;

2. the problems of back sprain and fatigue which may occur when a worker uses a manual slip are solved, the labor intensity of the worker is reduced, and the working efficiency is improved;

3. the whole chuck is controlled by remote hydraulic pressure without using a power supply, so that explosion-proof equipment is not needed, and the safety of the platform is ensured;

4. the indication signals of whether the slips in the shell are in place and whether the slips and the pipe column are clamped can be rapidly given, the drilling efficiency is greatly increased, and the method has good popularization and practical values in the field of petroleum drilling;

5. after bearing a large tonnage load, the chuck is not easy to deform, the slips fall into the slide rail to avoid self-rotation, large torque can be borne, and the torque resistance effect is good;

6. due to the design of the rack-and-pinion hydraulic cylinder and the bracket valve block, the internal space of the chuck is saved, and the production cost is reduced;

7. the chuck has the function of righting and adopts three formula slips structural design, and 360 degrees full encirclements are realized to the tubular column card, and the tubular column atress is even, convenient operation.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a side cross-sectional view of the present invention;

FIG. 4 is a schematic structural view of the upper cover of the present invention;

FIG. 5 is a schematic view of the slip of the present invention;

FIG. 6 is a schematic structural view of the lift pin of the present invention;

fig. 7 is a schematic structural view of the slide rail of the present invention.

In the figure: 1. the hydraulic control device comprises an upper cover, 2, a valve, 3, a shell, 4, a hydraulic system, 5, slips, 6, a die sleeve, 7, a left hydraulic cylinder, 8, an upper hydraulic cylinder, 9, a bracket type valve block, 10, a centering block, 11, a rotating arm, 12, a hinge pin, 13, a right hydraulic cylinder, 14, a slip in-place indicating valve, 15, a pin, 16, a hydraulic cylinder mounting plate, 17, a balance rod, 18, a sliding rail, 19, an ejector rod, 20 and a travel switch.

Detailed Description

As shown in fig. 1-6, a novel hydraulic chuck comprises an upper cover 1, a valve 2, a housing 3, a hydraulic system 4 and slips 5, wherein the valve 2 is connected with the housing 3, and the slips 5 are arranged on the inner sides of the valve 2 and the housing 3.

A slide rail 18 for guiding the slip 5 to ascend or descend is arranged below the housing 3, so that the slip 5 can move up and down according to a set path, and the slip 5 falls into the slide rail 18 to prevent rotation.

The slip 5 is provided with a balance rod 17 matched with a slide rail 18. The balance bar 17 has two functions: firstly, the slips 5 need to bear torque, the upper end of the slips 5 is in contact with the shell 3, and the balance rod 17 at the lower part of the slips 5 is arranged in a groove of the sliding rail 18, so that the chuck can be more stable; second, the balance bar 17 provides a guiding function when the slips 5 move up and down.

The casing 3 is internally provided with a left hydraulic cylinder 7 and a right hydraulic cylinder 13 which drive the slips 5 to ascend or descend, a mandril 19 is axially arranged in the casing 3, one end of the mandril 19 is fixedly connected with a travel switch 20, and the other end of the mandril 19 extends out of the casing 3 so as to be mutually touched in the descending process of the slips 5.

An upper cover 1 is arranged above the shell 3, the upper cover 1 is divided into a left cover and a right cover, the upper cover 1 is arranged above the shell 3 through a bracket type valve block 9, a centering block 10 is arranged on the inner side of the upper cover 1, and a rotating arm 11 used for rotating the centering block 10 is arranged between the upper cover 1 and the centering block 10.

The bracket type valve block 9 is hinged with the upper cover 1 through a hinge pin 12, an upper hydraulic cylinder is installed on the upper cover 1 through a hydraulic cylinder installation plate 16, and a rotating arm 11 is installed on the inner side of the upper cover 1 through a pin 15.

An upper hydraulic cylinder 8 for driving the centralizing block 10 is arranged on the upper cover 1.

And the two sides of the shell 3 are provided with a slip in-place indicating valve 14, when the slips 5 on the two sides are in place, the slip in-place indicating valve 14 is touched, and the slip in-place indicating valve 14 transmits a hydraulic signal to indicate that the slips 5 in the chuck are clamped.

A tooth plate sleeve 6 for adapting to the pipe column is arranged in the slip 5.

The slips 5 are three-piece slips.

The left hydraulic cylinder 7 and the right hydraulic cylinder 13 are both rack and pinion hydraulic cylinders.

When the chuck needs to clamp the pipe column, the slip in-place indicating valve 14 needs to be confirmed to transmit a hydraulic signal that the slips 5 are in place; meanwhile, the tubular column is firstly centered by the centering block 10 and then clamped by the slips 5, and at the moment, the push rod 19 needs to be capable of detecting that the tubular column is clamped by the slips 5 and feeding a hydraulic signal back to the hydraulic system 4. Correspondingly, when the pipe column is stopped being clamped, the pipe column needs to be loosened firstly and then leaves the centering block 10.

Claims

1. A novel hydraulic chuck is characterized by comprising an upper cover (1), a valve (2), a shell (3), a hydraulic system (4) and a slip (5), the valve (2) is connected with the shell (3), the slips (5) are arranged on the inner sides of the valve (2) and the shell (3), an upper cover (1) is arranged above the shell (3), a slide rail (18) for guiding the slip (5) to ascend or descend is fixed in the shell (3), a balance rod (17) matched with the slide rail (18) is arranged on the slip (5), a left hydraulic cylinder (7) and a right hydraulic cylinder (13) which drive the slips (5) to ascend or descend are arranged in the shell (3), a push rod (19) is axially arranged in the shell (3), one end of the push rod (19) is fixedly connected with a travel switch (20), the other ends of the push rods (19) extend out of the shell (3) so as to mutually touch in the process of descending the slips (5).

2. The novel hydraulic chuck as claimed in claim 1, characterized in that the upper cover (1) is divided into a left cover and a right cover, the upper cover (1) is mounted above the housing (3) through a bracket type valve block (9), a centering block (10) is arranged on the inner side of the upper cover (1), and a rotating arm (11) for rotating the centering block (10) is arranged between the upper cover (1) and the centering block (10).

3. A new hydraulic chuck according to claim 2, characterized in that the bracket-type valve block (9) is hinged with the upper cover (1) by means of a hinge pin (12), the upper hydraulic cylinder is mounted on the upper cover (1) by means of a hydraulic cylinder mounting plate (16), and the swivel arm (11) is mounted inside the upper cover (1) by means of a pin (15).

4. The new hydraulic chuck according to claim 2, characterized in that the upper cover (1) is provided with an upper cylinder (8) for driving the centering block (10).

5. A new hydraulic chuck according to claim 1, characterized in that the housing (3) is provided with slip in-place indicator valves (14) on both sides.

6. The novel hydraulic chuck according to claim 1, characterized in that a dental plate sleeve (6) for adapting to a pipe string is arranged in the slip (5) or a dental plate groove for adapting to a pipe string is arranged on the slip (5).

7. A new hydraulic chuck according to claim 1, characterized in that the slips (5) are three-piece slips.

8. The new hydraulic chuck according to claim 1, characterized in that the left hydraulic cylinder (7) and the right hydraulic cylinder (13) are both rack and pinion hydraulic cylinders.

9. A new hydraulic chuck according to claim 1, characterized in that the slips (5) are dropped into a slide (18) to prevent rotation.