CN209817959U - Anti-splashing kelly bar protection joint - Google Patents

Abstract

The utility model belongs to the oil field drilling equipment field especially relates to a prevent splash kelly protection joint. Including casing, valve rod, disk seat and spring, casing formula structure as an organic whole, spring, valve rod and disk seat in proper order from the upside of casing pack into the casing, disk seat and casing between be provided with soft becket, the outside of disk seat corresponds with soft becket's upper end and is provided with the ring channel, the inboard of casing also corresponds with soft becket's lower extreme and is provided with the ring channel, soft becket's upper and lower both ends extruded flow extremely two ring channels in. The utility model discloses set up soft becket between casing and disk seat, because the ring channel is to the limiting displacement of the soft becket after the extrusion deformation, the disk seat is by soft becket fixed connection on the casing, has realized the reliable fixed of disk seat in the casing. Meanwhile, the deformed soft metal ring has reliable sealing performance, and sealing between the shell and the valve seat can be absolutely guaranteed.

Description

Anti-splashing kelly bar protection joint

Technical Field

The utility model belongs to the oil field drilling equipment field especially relates to a prevent splash kelly protection joint.

Background

In the oil field drilling process, when the kelly bar is lifted, drilling fluid in the kelly bar can be splashed out from the lower end of the kelly bar, a drilling platform and a well site are polluted, and the waste of the drilling fluid is caused. However, in the existing splash-proof joint, the installation structure design of the valve seat which plays a sealing role together after being matched with the valve core is unreasonable, particularly, an O-shaped ring is often adopted for sealing between the existing valve seat and the shell of the splash-proof joint, the sealing reliability is poor, meanwhile, in order to install the valve seat in the shell of the splash-proof joint, the shell is often in a split structure, the structure not only increases the manufacturing cost, but also reduces the reliability of structural connection.

Disclosure of Invention

The utility model provides a prevent splash kelly protection joint to solve the problem of proposing among the above-mentioned background art.

The utility model provides a technical problem adopt following technical scheme to realize: the utility model provides a prevent splash kelly protection joint, including casing, valve rod, valve seat and spring are all installed in the casing, wherein, valve seat and casing fixed connection, and valve rod slidable mounting is in the casing, and the valve rod keeps the motion trend of being close to the valve seat under the spring force effect, and the upper end of valve rod is provided with conical valve head, is provided with the conical surface that matches with the valve head on the valve seat, and valve head and valve seat cooperation realize the sealed of valve, the casing formula structure as an organic whole, spring, valve rod and valve seat in proper order from the upside of casing pack into the casing, valve seat and casing between be provided with soft becket, the outside of valve seat and soft becket's upper end correspond is provided with the ring channel, the inboard of casing also corresponds with soft becket's lower extreme and is provided with the ring channel, soft becket's upper and lower both ends extruded flow, thereby fixing the valve seat to the housing; the center of the valve rod is provided with an axial blind hole, and the upper end of the axial blind hole is provided with a liquid passing hole for communicating the inside and the outside of the valve rod.

Hard alloy layers are sprayed on the conical surface of the valve seat and the outer side of the valve head. The soft metal ring is made of Cu-10Ni alloy.

The utility model has the advantages that: the utility model discloses set up soft becket between casing and disk seat, during the assembly disk seat, earlier with the cross-section for the soft becket cover of rectangle in the disk seat outside, then with disk seat and soft becket together pack into the casing, then apply decurrent pressure to the disk seat through the press, make the disk seat continue down and extrude soft becket, soft becket on the soft becket compel flow and flow into two ring channels in, the ring channel is filled up the back by soft becket, soft becket does not have the space that flows, the disk seat stops down. Due to the limiting effect of the annular groove on the soft metal ring after extrusion deformation, the valve seat is fixedly connected to the shell by the soft metal ring, and the valve seat is reliably fixed in the shell. Meanwhile, the deformed soft metal ring has reliable sealing performance, sealing between the shell and the valve seat can be absolutely guaranteed, and sealing can never fail under normal working conditions.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the housing;

FIG. 3 is a schematic view of the valve seat structure;

fig. 4 is a schematic view of the structure of the soft metal ring before assembly.

In the figure: 1-shell, 2-valve rod, 3-valve seat, 4-spring, 5-axial blind hole, 6-liquid passing hole, 7-valve head, 8-soft metal ring, 9-annular groove and 10-hard alloy layer.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

this embodiment includes casing 1, valve rod 2, disk seat 3 and spring 4, and valve rod 2, disk seat 3 and spring 4 are all installed in casing 1, and wherein, disk seat 3 and casing 1 fixed connection, valve rod 2 slidable mounting are in casing 1, and valve rod 2 keeps the motion trend that is close to disk seat 3 under the spring 4 elastic force effect, and the upper end of valve rod 2 is provided with conical valve head 7, be provided with on the disk seat 3 with the conical surface that valve head 7 matches, valve head 7 and the cooperation of disk seat 3 realize the sealing of valve. The above is a common structure in the prior art, and is not described herein again.

The utility model discloses in, spring 4, valve rod 2 and disk seat 3 pack into casing 1 from casing 1's upside in proper order for integral type structure can be made to casing 1, compares with split type shell structure among the prior art, shell structure's reliability increases by a wide margin.

The soft metal ring 8 is arranged between the valve seat 3 and the shell 1, the annular groove 9 is correspondingly arranged on the outer side of the valve seat 3 and the upper end of the soft metal ring 8, the annular groove 9 is correspondingly arranged on the inner side of the shell 1 and the lower end of the soft metal ring 8, and the upper end and the lower end of the soft metal ring 8 are extruded and flow into the two annular grooves 9, so that the valve seat 3 is fixed on the shell 1. The utility model discloses set up soft becket 8 between casing 1 and disk seat 3, during assembly disk seat 3, earlier overlap soft becket 8 that the cross-section is the rectangle in the disk seat 3 outside, then together pack into casing 1 with disk seat 3 and soft becket 8, then apply decurrent pressure to disk seat 3 through the press, make disk seat 3 continue down and extrude soft becket 8, soft becket 8 on the soft becket is forced to flow and is flowed into two ring channels 9 in, ring channel 9 is filled up the back by soft becket, soft becket no flow space, disk seat 3 stops down. Because the annular groove 9 has a limiting function on the soft metal ring 8 after extrusion deformation, the valve seat 3 is fixedly connected on the shell 1 by the soft metal ring 8, and the reliable fixation of the valve seat 3 in the shell is realized. Meanwhile, the deformed soft metal ring 8 has extremely reliable sealing performance, sealing between the shell 1 and the valve seat 3 can be absolutely guaranteed, and sealing can never fail under normal working conditions. By using the inventive structure of a soft metal ring, the mounting and sealing structure of the valve seat 3 on the housing 1 can also be simplified.

According to the stress characteristic of the valve seat 3, the valve seat 3 mainly bears the downward force exerted by the valve head 7 and the upward force exerted by the drilling fluid, the force exerted by the valve head 7 is very small in the two forces, the upward force exerted by the drilling fluid is larger in the range borne by the tensile capacity of the soft metal ring 8, and the valve seat 3 can bear great pressure and cannot be displaced because no flowing space exists after the soft metal ring 8 is installed.

The valve rod 2 central authorities be provided with axial blind hole 5, the upper end of axial blind hole 5 is provided with and is used for the inside and outside liquid hole 6 that crosses of intercommunication valve rod 2. The inner side of the valve rod 2 is subjected to liquid passing, so that the spring is prevented from being washed by drilling fluid, and the service life of the spring is prolonged to a great extent.

At present, various types of splash joint do not all have any problem in principle, but in the in-service use process, the faying face of valve head 7 and disk seat 3 is very easily destroyed by the erosion of the fast-speed drilling fluid of high pressure, and the utility model discloses in, disk seat 3 on the conical surface and the outside of valve head 7 all spray and have stereoplasm alloy layer 10, can effectively resist the erosion, improve the life of valve head and disk seat.

The soft metal ring 8 is made of Cu-10Ni alloy. The copper alloy has moderate hardness, good plasticity and corrosion resistance, and certain tensile strength and shear strength, and is beneficial to ensuring the installation reliability, easy installation and sealing performance of the valve seat 3.

Claims (3)

1. The utility model provides a prevent splash kelly protection joint, including casing (1), valve rod (2), disk seat (3) and spring (4) are all installed in casing (1), wherein, disk seat (3) and casing (1) fixed connection, valve rod (2) slidable mounting is in casing (1), valve rod (2) keep the motion trend that is close to disk seat (3) under spring (4) spring action, the upper end of valve rod (2) is provided with valve head (7) of coniform, be provided with on disk seat (3) with the conical surface that valve head (7) match, valve head (7) and disk seat (3) cooperation realize the sealing of valve, its characterized in that: the shell (1) is of an integrated structure, the spring (4), the valve rod (2) and the valve seat (3) are sequentially installed into the shell (1) from the upper side of the shell (1), a soft metal ring (8) is arranged between the valve seat (3) and the shell (1), an annular groove (9) is correspondingly formed in the outer side of the valve seat (3) and the upper end of the soft metal ring (8), an annular groove (9) is correspondingly formed in the inner side of the shell (1) and the lower end of the soft metal ring (8), and the upper end and the lower end of the soft metal ring (8) are extruded to flow into the two annular grooves (9), so that the valve seat (3) is fixed on the shell (1); the valve rod (2) central authorities be provided with axial blind hole (5), the upper end of axial blind hole (5) is provided with and is used for communicating the interior liquid hole (6) of crossing of valve rod (2) inside and outside.

2. The anti-splash kelly joint of claim 1, wherein: hard alloy layers (10) are sprayed on the conical surface of the valve seat (3) and the outer side of the valve head (7).

3. The anti-splash kelly joint of claim 1, wherein: the soft metal ring (8) is made of Cu-10Ni alloy.