CN2746118Y

CN2746118Y - Reducing flashboard for well drilling

Info

Publication number: CN2746118Y
Application number: CN 200420118577
Authority: CN
Inventors: 苏尚文; 赵荣军; 孟宪行; 许宏奇
Original assignee: RONGSHENG MACHINERY MANUFACTURE Ltd OF HUABEI OILFIELD
Current assignee: RONGSHENG MACHINERY MANUFACTURE Ltd OF HUABEI OILFIELD
Priority date: 2004-10-14
Filing date: 2004-10-14
Publication date: 2005-12-14
Anticipated expiration: 2014-10-14

Abstract

The utility model belongs to a reducing flashboard for well drilling, which relates to a matched device for petroleum well drilling engineering. The utility model is composed of a flashboard body and seals mounted in the flashboard body. The utility model is characterized in that a front sealing is arranged in a half annular groove on the front end of the flashboard body; a top seal is arranged in a half annular groove on the upper end face of the flashboard body and is connected with the front seal together though a bolt of the top seal. The upper and lower edges of an H-shaped framework are mutually lapped together, which forms a circular arc shape. The spacing exists in the framework. An upper sizing block and a lower sizing block are respectively arranged on both sides of the framework and are connected together though a positioning pin. The utility model has the advantages that the diameter size of the seals can be changed in the certain range, which realizes that a pair of flashboards can seal drill stems with the different specification sizes; the ratio of the range of the diameter reducing is comparatively large; the bearing pressure is comparatively large; the sealing is reliable. Because the blowout preventer flashboard is used, the installed flashboard number is reduced, the operational processes for changing the flashboards are reduced, and the work efficiency is improved.

Description

A kind of drilling well variable bore ram

Technical field

The utility model relates to a kind of petroleum drilling engineering corollary equipment.

Background technology

In a single day a kind of important device of blowout taking place suddenly when ram preventer is the prevention drilling well, it is installed on the well head, blowout takes place in drilling process, can utilize it that well head is sealed, prevents blowout.At present mostly used ram block is fixed dimension in drilling engineering, a kind of flashboard of size can only seal the drill string of corresponding size, if change drilling tool or drill string, will change corresponding ram block, not only increase many workloads, also will be equipped with the flashboard of various different sizes.This ram block is not suitable for way-type drilling unit yet, when drilling well needs way-type drilling unit, the flashboard of different size will be installed, and has so both increased the weight of preventer, makes its volume bigger yet, occupies the well head more space.After changing drilling tool, need to change corresponding flashboard, increased activity duration and labour intensity.

The utility model content

The purpose of this utility model provides a kind of drilling well variable bore ram, uses it can seal the drilling tool of different size specification in drilling process, reduces the workload of changing flashboard, increases work efficiency.

Technical solution of the present utility model is to realize like this, a kind of drilling well variable bore ram, constitute by flashboard body and the preceding sealing and the top sealing that are installed in the flashboard body, preceding sealing is installed in the half circle groove of flashboard body front end, the top sealing is installed in the half circle groove of flashboard body side surface, the top sealing is in the same place by alignment pin and preceding sealed connection, its special character is, (1) preceding sealing is by skeleton, last parallels, lower padding iron, the side parallels, the alignment pin sulfuration constitutes in preceding caulking gum, bottom overlaps in the arc-shaped mutually on the I-shaped skeleton, leave the space between the skeleton, last parallels, lower padding iron places the skeleton both sides respectively, is bound up by alignment pin.(2) parallels in caulking gum both sides, top constitutes by top caulking gum and sulfuration in the top sealing, is fixed with latch at caulking gum two ends, top.

The beneficial effects of the utility model are, (1) the utility model adopts the bigger elastomeric material of elasticity to make, sulfuration has and can be out of shape metallic framework and the metal parallels that moves with caoutchouc elasticity in rubber, and in rubber, be reserved with the space that can hold rubber deformation, therefore the diameter of its sealing can change in certain scope, has realized the drill string of the salable different specification size of an auxiliary gate-board, and the scope of its variable-diameter is bigger, the pressure that is born is also bigger, and sealing is reliable.(2) use this ram block, can reduce the quantity of institute's configuration flashboard, reduce the operating process of changing flashboard, improved operating efficiency.

Description of drawings

Accompanying drawing 1 is the front view that partly cuts open of the present utility model.

Accompanying drawing 2 is A-A cross sectional plan views of Fig. 1.

Accompanying drawing 3 is left pseudosections of Fig. 1.

The specific embodiment

At first make alignment pin 2, skeleton 5, go up parts such as parallels 6, lower padding iron 7, side parallels 8.Overlap 6 I-shaped skeletons 5 in the arc-shaped mutually, leave the spacing of 10-30 millimeter between the skeleton 5, last parallels 6, lower padding iron 7 ride over respectively the right and left skeleton 5 on, in the bottom, the upper and lower side of alignment pin 2 is through in the locating hole of parallels 6 and lower padding iron 7, to go up parallels 6, lower padding iron 7 is bound up, side parallels 8 places parallels 6, between the termination of lower padding iron 7, after making their location, they and preceding caulking gum 3 are sulfided, make the preceding sealing 15 of " Ω " shape, form space 14 between the skeleton 5, be reserved with pin hole at the two ends of preceding sealing 15.The two ends of bearing pin 12 are penetrated respectively in the hole of right parallels 10 and left parallels 13, right parallels 10 and left parallels 13 are bound up, and, they and top caulking gum 11 are sulfided, be made into the top sealing 16 of C shape latch 9 location.

The preceding sealing of making 15 is installed in the semi-circular groove of flashboard body 4 front ends, top sealing 16 is installed in the groove of side semi-round ring shape of flashboard body 4, the extension of the latch 9 in the top sealing 16 is inserted in the pin hole of preceding sealing 15, sealing 15 and top sealing 16 are bound up before making, and form a complete flashboard.2 flashboards are installed in the ram preventer housing, preventer is installed on the well head.When will blowout take place, close up together by the preceding sealing 15 that hydraulic system promotes on 4,2 flashboards of 2 flashboard bodies, form a complete circular hole in the middle of the preceding caulking gum 3, under the effect of hydraulic coupling, dwindle gradually, drilling rod is tightly embraced.In the top of 2 flashboard body 4 sides sealing 16, also close up together simultaneously, form a complete annulus, will seal up between flashboard upper surface and the preventer housing, realize the purpose of sealing.When the drilling tool of the less diameter specifications of sealing, the plane 1 of sealing 15 both sides shoulders at first combines before two, and skeleton 5 is along the circumferential direction inwardly shunk, and caulking gum 3 protrudes to the center before the extruding, and drilling tool is sealed up.When sealing the drilling tool of big specification, annular section rubber in the middle of the preceding sealing 15 are at first embraced drilling tool, make skeleton 5 along the circumferential direction to external diffusion, and caulking gum 3 protrudes to both sides before the extruding, the plane 1 of sealing 15 both sides shoulders before two is combined, well head is sealed.

Claims

A kind of drilling well variable bore ram, by flashboard body (4) be installed in preceding sealing (15) and top sealing (16) formation in the flashboard body, preceding sealing (15) is installed in the half circle groove of flashboard body (4) front end, top sealing (16) is installed in the half circle groove of flashboard body (4) side, top sealing (16) is bound up by alignment pin (9) and preceding sealing (15), it is characterized in that:

1. before sealing (15) by skeleton (5), go up parallels (6), lower padding iron (7), side parallels (8), alignment pin (2) sulfuration formation in preceding caulking gum (3), I-shaped skeleton (5) is gone up bottom and is overlapped in the arc-shaped mutually, leave space (14) between the skeleton (5), last parallels (6), lower padding iron (7) place skeleton (5) both sides respectively, are bound up by alignment pin (2);
2. the parallels (10,13) in top caulking gum (11) both sides constitutes by top caulking gum (11) and sulfuration in top sealing (16), is fixed with latch (9) at top caulking gum (11) two ends.