CN212003069U

CN212003069U - Hydraulic pressure device for horizontal well drilling tool

Info

Publication number: CN212003069U
Application number: CN202020608813.XU
Authority: CN
Inventors: 武程亮; 牟海萍; 潘发旺
Original assignee: Second Exploration Team Of Shandong Coalfield Geology Bureau
Current assignee: Second Exploration Team Of Shandong Coalfield Geology Bureau
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-11-24
Anticipated expiration: 2030-04-22

Abstract

The utility model relates to a horizontal well hydraulic pressure device for drilling tool, including the cylinder, be equipped with the piston in the cylinder, the top of cylinder is connected with the top connection, is equipped with sealing device on the piston, and sealing device is equipped with the sealing washer including setting up the annular groove on the piston periphery in the annular groove, and the top of annular groove is equipped with annular clamping ring, is equipped with annular support recess on the up end of piston, is equipped with in the support recess and presses the cover, and the lower extreme that presses the cover is fixed with the adapter sleeve, and the adapter sleeve lower extreme stretches into the annular groove and fixes with the clamping ring. The utility model discloses a set up sealing device on the piston, sealing device receives the fluid pressure on the piston up end and can exert pressure to the sealing washer for the sealing washer pressurized deformation presses close to on the cylinder body inside wall, increases sealed effect, prevents to leak.

Description

Hydraulic pressure device for horizontal well drilling tool

Technical Field

The utility model belongs to the technical field of the drilling tool, concretely relates to hydraulic pressure device for horizontal well drilling tool.

Background

At present, in oil drilling, the bit pressure required by a drill bit is provided by the weight of a drill collar at the upper part of the drill bit, the traditional rigid pressurizing mode has many inevitable defects, such as uneven bit feeding, bit jumping, bending of a drilling tool and the like, which seriously affect the mechanical drilling speed and the service life of the drill bit and the drilling tool, and the successful emergence of a hydraulic pressurizing device makes the solution of the problems realized.

However, the conventional hydraulic pressurizing device generally has poor sealing performance due to structural problems, and particularly, the cylinder and the piston body are only sealed by the tight fit between the cylinder and the piston body, but high-pressure fluid is likely to leak from a gap between the cylinder and the piston body due to high working pressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a horizontal well hydraulic pressure device for drilling tool, solve in the present pressure device only lean on between cylinder and the piston body between the two inseparable cooperation seal, nevertheless because operating pressure is great, the problem of leaking in the clearance between the two is probably followed to the high-pressure liquid.

The utility model discloses hydraulic pressure device for horizontal well drilling tool, including the cylinder, be equipped with the piston in the cylinder, the top of cylinder is connected with the top connection, is equipped with sealing device on the piston, and sealing device is equipped with the sealing washer including setting up the annular groove on the piston periphery in the annular groove, and the top of annular groove is equipped with annular clamping ring, is equipped with annular support recess on the up end of piston, is equipped with in the support recess and presses the cover, and the lower extreme that presses the cover is fixed with the adapter sleeve, and the adapter sleeve lower extreme stretches into the annular groove and fixes with the clamping ring.

Preferably, the outer diameter of the pressing ring is smaller than that of the piston, sealing is prevented from being affected, the pressing ring is in clearance fit with the inner wall of the annular groove, and O-shaped rings are arranged on the inner wall and the outer wall of the pressing sleeve and used for sealing.

Preferably, the piston comprises a primary piston, a secondary piston and a tertiary piston, a sealing device with the same structure is arranged on each stage of piston, the lower end of the primary piston is fixedly connected with the mandrel, and the lower end of the mandrel is connected with the drill bit.

Preferably, the top outside of cylinder is equipped with annular boss, and the lower extreme of top connection is equipped with the annular concave station with annular boss complex, and annular concave station and the top of cylinder all are equipped with square slot one, and annular boss top and top connection bottom all are equipped with the square inserted block one with square slot one complex, are fixed with sealing rubber pad on the annular boss inside wall, are equipped with the fixing bolt who connects upper joint and cylinder on the lateral wall of annular concave station along its circumference. Through bolt fixed connection to square inserted block one can reduce the influence of rotation torsion with square recess one cooperation, prevents to dismantle and can not get off.

Preferably, the cylinder divide into cylinder, well cylinder and lower cylinder, and well cylinder all is equipped with square inserted block two with the top of cylinder down, and the bottom of going up cylinder and well cylinder all is equipped with square inserted block two complex square groove two, goes up for the welding between cylinder, well cylinder and the lower cylinder, solder joint sealing connection gap prevents the weeping, conveniently makes and installs the piston, and square inserted block two conveniently cooperates with square groove two and assembles and can share a part torsion.

Preferably, the inner side wall of the annular boss is provided with an annular sealing bulge, and the side wall of the annular boss is provided with a sealing groove matched with the sealing bulge, so that the sealing effect is better.

Compared with the prior art, the utility model has the advantages of:

through set up sealing device on the piston, sealing device receives the fluid pressure on the piston up end and can exert pressure to the sealing washer for the sealing washer pressurized deformation presses close to on the cylinder body inside wall, increases sealed effect, prevents to leak.

Drawings

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

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

in the figure: 1. the piston comprises an upper joint, 2, a third-level piston, 3, an upper cylinder barrel, 4, a square insert block II, 5, a second-level piston, 6, a middle cylinder barrel, 7, a lower cylinder barrel, 8, a sealing ring, 9, a first-level piston, 10, a square insert block I, 11, a fixing bolt, 12, a sealing protrusion, 13, a sealing rubber gasket, 14, a pressing sleeve, 15, an O-shaped ring, 16, a supporting groove, 17, a connecting sleeve, 18, an annular groove, 19 and a pressing ring.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

The hydraulic pressurizing device for the horizontal well drilling tool shown in fig. 1 to 3 comprises a cylinder barrel, a piston is arranged in the cylinder barrel, the top of the cylinder barrel is connected with an upper joint 1, a sealing device is arranged on the piston and comprises an annular groove 18 arranged on the circumferential surface of the piston, a sealing ring 8 is arranged in the annular groove 18, an annular pressing ring 19 is arranged above the annular groove 18, an annular supporting groove 16 is arranged on the upper end surface of the piston, a pressing sleeve 14 is arranged in the supporting groove 16, a connecting sleeve 17 is fixed at the lower end of the pressing sleeve 14, and the lower end of the connecting sleeve 17 extends into the annular groove 18 and is fixed with the pressing ring 19.

The outer diameter of the pressing ring 19 is smaller than that of the piston, and the inner wall and the outer wall of the pressing sleeve 14 are both provided with O-shaped rings 15.

The piston comprises a primary piston 9, a secondary piston 5 and a tertiary piston 2, and each stage of piston is provided with a sealing device with the same structure.

The top outside of cylinder is equipped with annular boss, the lower extreme of top connection 1 be equipped with annular boss complex annular concave station, the top of annular concave station and cylinder all is equipped with square slot one, annular boss top and top connection 1 bottom all be equipped with square slot one complex square inserted block one 10, be fixed with sealing rubber pad 13 on the annular boss inside wall, be equipped with the fixing bolt 11 of connecting top connection 1 and cylinder on the lateral wall of annular concave station along its circumference.

The cylinder is divided into an upper cylinder 3, a middle cylinder 6 and a lower cylinder 7, the tops of the middle cylinder 6 and the lower cylinder 7 are respectively provided with a square second inserting block 4, and the bottoms of the upper cylinder 3 and the middle cylinder 6 are respectively provided with a square second groove matched with the square second inserting block 4.

The inner side wall of the annular boss is provided with an annular sealing bulge 12, and the side wall of the annular boss is provided with a sealing groove matched with the sealing bulge 12.

The hydraulic pressurizing device has the working principle that when the hydraulic pressurizing device works, a pump is started to circulate slurry, pressure drop is formed in a tool, the pressure drop acts on the end face of a piston to form thrust, the piston is pushed to move downwards until a forming end position is formed, and the thrust is the bit pressure required by a drill bit.

When the device works, the upper end face of the piston is pressurized, the pressing sleeve can be pressed to move downwards, the connecting sleeve is driven to move downwards, the pressing ring applies pressure to the sealing ring, and the sealing ring is elastically deformed under the action of the pressure, so that the sealing ring is pressed close to the inner wall of the cylinder barrel and is better sealed.

To sum up, the utility model discloses a set up sealing device on the piston, sealing device receives the fluid pressure on the piston up end and can exert pressure to the sealing washer for the sealing washer pressurized deformation presses close to on the cylinder body inside wall, increases sealed effect, prevents to leak.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description of the present invention rather than requiring the present invention to be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims

1. A hydraulic pressurizing device for a horizontal well drilling tool comprises a cylinder barrel, wherein a piston is arranged in the cylinder barrel, and the top of the cylinder barrel is connected with an upper joint (1), and is characterized in that a sealing device is arranged on the piston and comprises an annular groove (18) arranged on the circumferential surface of the piston, a sealing ring (8) is arranged in the annular groove (18), an annular pressing ring (19) is arranged above the annular groove (18), an annular supporting groove (16) is arranged on the upper end surface of the piston, a pressing sleeve (14) is arranged in the supporting groove (16), a connecting sleeve (17) is fixed at the lower end of the pressing sleeve (14), and the lower end of the connecting sleeve (17) extends into the annular groove (18) and is fixed with the pressing ring (.

2. The hydraulic pressurizing device for the horizontal well drilling tool as recited in claim 1, wherein: the outer diameter of the pressing ring (19) is smaller than that of the piston, and O-shaped rings (15) are arranged on the inner wall and the outer wall of the pressing sleeve (14).

3. The hydraulic pressurizing device for the horizontal well drilling tool as recited in claim 2, wherein: the piston comprises a primary piston (9), a secondary piston (5) and a tertiary piston (2), and each stage of piston is provided with a sealing device with the same structure.

4. The hydraulic pressurizing device for the horizontal well drilling tool as recited in claim 2, wherein: the top outside of cylinder is equipped with annular boss, the lower extreme of top connection (1) be equipped with annular boss complex annular concave station, the top of annular concave station and cylinder all is equipped with square slot one, annular boss top and top connection (1) bottom all be equipped with square slot one complex square inserted block (10), be fixed with sealing rubber pad (13) on the annular boss inside wall, be equipped with on the lateral wall of annular concave station along its circumference and connect fixing bolt (11) of connecting joint (1) and cylinder.

5. The hydraulic pressurizing device for the horizontal well drilling tool as recited in claim 4, wherein: the cylinder barrel is divided into an upper cylinder barrel (3), a middle cylinder barrel (6) and a lower cylinder barrel (7), the tops of the middle cylinder barrel (6) and the lower cylinder barrel (7) are respectively provided with a square insertion block II (4), and the bottoms of the upper cylinder barrel (3) and the middle cylinder barrel (6) are respectively provided with a square groove II matched with the square insertion block II (4).

6. The hydraulic pressurizing device for the horizontal well drilling tool as recited in claim 4, wherein: the inner side wall of the annular boss is provided with an annular sealing bulge (12), and the side wall of the annular concave table is provided with a sealing groove matched with the sealing bulge (12).