CN2245114Y

CN2245114Y - Sealer for well head

Info

Publication number: CN2245114Y
Application number: CN 95221751
Authority: CN
Inventors: 刘建国; 张凤岐; 吕宏霞
Original assignee: 刘建国
Priority date: 1995-09-15
Filing date: 1995-09-15
Publication date: 1997-01-15
Anticipated expiration: 2005-09-15

Abstract

The utility model relates to an oil extraction mechanism device, particularly a sealer for a well head. The utility model is composed of a polished rod, a main body, a spherical seat, an annual seal ring, a set of conical seal rings, seal ring press covers, a press cap, a seal box, etc. The utility model is characterized in that the spherical head part of the spherical seat is contacted with the conical surface of the main body. The annual seal ring and the conical seal rings are sheathed on the polished rod orderly. The seal ring press covers are respectively pressed against the seal rings. The utility model has the advantages of simple structure, convenient assembly and disassembly for sealing, and long service life. Besides, the deviation of an angle can be rectified within a definite range.

Description

Novel wellhead sealing device

The utility model relates to the oil recovery machiner device, particularly a kind of supporting novel wellhead sealing device of deep well pump mechanical oil recovery that aims at.

At present, the mechanism principle of known polished rod sealer, shown in Fig. 1, Fig. 2 (Fig. 2 is the partial sectional view of Fig. 1): the bottom of main body 2 connects production tree, and polished rod 3 pumps and carries out oil producing operation; The top of main body 2 is garden cylindricality packing boxs, and packing pressure cap 6 compresses one group of garden cylindricality packing 5 by packing gland l and seals well head; There are two adjusting screw mandrels 4 at the middle part of main body 2, is used for two and half garden shape sealing rings 7 are snapped on the polished rod 3 the control blowout.There are following three shortcomings in this wellhead sealing device: 1, no center tuningout, sealer is installed on the production tree, the center just fixes, this just requires the installation accuracy when oil pumper is installed very high, the general requirements polished rod is not more than 1 millimeter to the center to moderate, but does not reach this requirement in fact at all, thus polished rod and packing in fact great majority the eccentric wear phenomenon is arranged, cause packing impaired in early days, the life-span reduces.In actual the use, at most a week, must change packing a couple of days at least; 2, change the packing difficulty because packing very closely is pressed in the packing box of garden cylindricality, when scratching outward, overcome one section distance that resistance is very big, especially nethermost packing is scratched so one by one outward, changes very difficulty; 3, the blowout prevention hermetically-sealed construction is too complicated.

The utility model is exactly to be the solution the deficiencies in the prior art, and a kind of novel wellhead sealing device is provided.

The utility model is achieved in that and has adopted novel spheric seat to combine with novel main body, the bottom of spheric seat connects with the well head production tree, the bulb part of spheric seat contacts with the conical surface of main body, because ball head is divided into circular-arc, contact with the conical surface of main body like this and can carry out the angle tuningout within the specific limits, solved the eccentric wear problem of deciding between bar and the sealing ring.

Describe the utility model in detail below in conjunction with accompanying drawing

Fig. 1 is the structural representation of existing sealer.

Fig. 2 is the partial sectional view of Fig. 1.

Fig. 3 is a structural representation of the present utility model.

Learn by Fig. 3: the utility model is by polished rod 3, O-ring seal 8, main body 9, spheric seat 10, sealing ring gland 11, seal box 12, conical seal ring 13, sealing ring pressure cap 14 compositions such as grade, polished rod 3 places sealing ring main body 9, spheric seat 10, sealing ring gland 11, in seal pressure cap 14 grades, wherein the bulb circular arc portion of spheric seat 10 contacts with the conical surface of main body 9, can advance the angle tuningout within the specific limits, and an O-ring seal 8 is on spheric seat 10 tops and in main body 9, the control blowout, there is a seal box 12 main body 9 outsides, and one group of conical seal ring 13 is arranged in cylindricality sealing ring 8 tops and seal box 12, the sealing well head, sealing ring gland 11 is pushed down O-ring seal 8 and one group of conical seal ring 13 respectively, and a sealing ring pressure cap 14 is arranged at the top of the sealing ring gland 11 on seal box 12 and the conical seal ring 13.Because this novel wellhead sealing device, make the sealing ring easy installation and removal, and improved greatly its application life.

Claims

1, a kind of novel wellhead sealing device, by polished rod, O-ring seal, spheric seat, the sealing ring gland, seal box, conical seal ring, compositions such as sealing ring pressure cap, it is characterized in that polished rod places sealing ring, sealing ring gland, sealing ring pressure cap, main body, spheric seat etc., the bulb circular arc portion of spheric seat contacts with the conical surface of main body, and a ring packing has one group of conical seal ring on spheric seat top and in main body in O-ring seal top and seal box.

2, sealer according to claim 1 is characterized in that the sealing ring gland pushes down O-ring seal and one group of conical seal ring respectively.

3, according to weighing and requiring 1 described sealer, it is characterized in that there is a seal box main body outside.

4, sealer according to claim 1 is characterized in that a sealing ring pressure cap 14 is arranged at the top of the sealing ring gland on seal box and the conical seal ring.