CN201024952Y - Theft prevention well mouth device - Google Patents

Abstract

The utility model relates to a thief poor well mouth device, belonging to the oil extracting device for oil field. The utility model has a well mouth main body which is communicated with a well measuring tube, a well washing tube and an outlet tube; the well measuring tube, the well washing tube and the oil discharge tube are provided with an anti thief valve through a hoop; the anti thief valve has a valve body which is provided with an outer shell in which a lock body is arranged; the outer ends of a plurality of lock pins which pierce the lock body have rotary grooves, whereas the inner ends are provided with a lock blade through a screw cap; and the inner wall of the outer housing has a flute opposite to the lock plate. As arranging the anti thief valve of the lock body, the well mouth device greatly enhances thief-proof performance and avoids the economic loss caused by the steal of valve; moreover, as adding anti thief-proof measures on the hoop, the utility model further enhances the thief-proof performance.

Description

The Pithead preventing thieves device

Technical field

The utility model provides a kind of oil field to recover the oil and has used wellhead assembly.

Background technology

Existing oil recovery with wellhead assembly on owing to there is not effective anti-theft measure, make the lawless person can be easily open valve and steal crude oil by being exposed to outer valve handle.In addition, the lawless person can also use common wrench to open the clip that connects wellhead component, steals crude oil or well head component.Like this, all can cause serious economic loss to the oil field.

Summary of the invention

Technical problem to be solved in the utility model is, a kind of Pithead preventing thieves device is provided, and to improve the theftproof performance of wellhead assembly, avoids producing economic loss.

The utility model is to realize like this, the Pithead preventing thieves device, it has the well head main body, well head lower body part one side is communicated with the well logging pipe, opposite side is communicated with the well-flushing pipe, well head main body top is communicated with flowline, the well logging pipe, the well-flushing pipe, by clip valve for guarding against theft is installed respectively on the flowline, valve body is arranged on valve for guarding against theft, be fixed with shell on the valve body, lock body is installed in the shell, there is rotation slot a plurality of lock pins outer end of passing lock body, the inner is equipped with locking plate by nut, has on the wall in the enclosure and the corresponding groove of locking plate, and the part that is shaped as of locking plate is protruded, another part is recessed.

Adopt the Pithead preventing thieves device of said structure,, therefore improved theftproof performance greatly, the economic loss of having avoided valve to be caused by pirate of the open owing to be provided with valve for guarding against theft with lock body.On clip, also can increase anti-theft measure, with further raising theftproof performance.

Description of drawings

Fig. 1 is the schematic diagram of the utility model structure.

Fig. 2 is the A-A sectional drawing of Fig. 1.

Fig. 3 is the upward view after the parts such as lock body on the valve for guarding against theft are installed together.

Fig. 4 is the front view of Fig. 3.

Fig. 5 is the vertical view of Fig. 4.

Fig. 6 has represented the shape of locking plate.

The specific embodiment

The embodiment that provides below in conjunction with accompanying drawing further specifies concrete structure of the present utility model.

As shown in drawings, the Pithead preventing thieves device of the utility model, it has well head main body (2), well head lower body part one side is communicated with well logging pipe (7), opposite side is communicated with well-flushing pipe (1), well head main body top is communicated with flowline (3), the well logging pipe, the well-flushing pipe, by clip (4) valve for guarding against theft (5) is installed respectively on the flowline, valve body (58) is arranged on valve for guarding against theft, be fixed with shell (55) on the valve body, lock body (52) is installed in the shell, there is rotation slot a plurality of lock pins (53) outer end of passing lock body, the inner is equipped with locking plate (54) by nut (59), have on the wall in the enclosure and the corresponding groove of locking plate, the part that is shaped as of locking plate is protruded, another part is recessed.

When inserting flathead screwdriver rotating lock pin in the rotation slot of lock pin outer end, lock pin drives locking plate and rotates, and when the projection that turns to locking plate injects in the groove on the outer casing inner wall, just lock body can be locked in the shell.Further rotate locking plate, make the protuberance displacement of locking plate go out groove on the outer casing inner wall, the recess of locking plate is during towards this groove, and because of locking plate no longer is stuck in the groove, lock body can break away from shell and can take out in shell.After taking out lock body, instruments such as spanner can be inserted shell, be stuck on the valve stem nut (56) of valve rod (57) exterior upper portion, drive valve rod by the rotation valve rod nut and move, finish the unlatching of valve or close.For improving theftproof performance, valve stem nut can adopt the special-shaped shape beyond the hexagon, must use special spanner ability rotation valve rod nut like this.

The mark of distinguishing each lock pin can be arranged, as letter characters such as " A ", " B ", " C ", " D ", " E " on each lock pin end face.Lock body end face around at the lock pin top, the mark that expression lock pin turned position can be arranged, as numerical chracters such as " 1 ", " 2 ", " 3 ", " 4 ", during any one numeral of the lock body end face around the rotation slot on each lock pin points to it, just formed one group of password.When this group password represented that each lock pin turns to position shown in the password, locking plate turned to its projection and breaks away from the groove of shell (55) inwall, the position of the close groove of recess, the position of promptly unblanking.

Owing to must take out lock body, the therefore theftproof performance that has improved this valve greatly and the wellhead assembly of this valve is installed earlier when unlatching or valve-off.

On described clip (4), a pair of clip skin (42) links together by the special-shaped nut (41) on bolt (44) and the bolt, is set with saw preventing sleeve tube (43) between bolt and the clip skin, and special-shaped nut is positioned at the counterbore on the clip skin.

Described special-shaped nut (41) be shaped as pentagon, heptagon or other special-shaped shapes.

Because special-shaped nut has adopted the special-shaped shape beyond the common hexagon of nut, and this nut is positioned at the counterbore on the clip skin, do not use special spanner this nut can not be backed out, and therefore further improved the theftproof performance of this wellhead assembly.Add between bolt and the clip skin and be set with the saw preventing sleeve tube, can not be with saw that bolt is sawed-off by the opening on the clip, theftproof performance is stronger.The saw preventing sleeve tube can pass through Quenching Treatment, to improve hardness.In addition, during saw saw preventing sleeve tube, the saw preventing sleeve tube can rotate outside bolt, is difficult for being cut.

There is locking closure (51) to be installed in the shell (55) in described lock body (52) outside.Between locking closure and the shell by being threaded.The rotation direction of this screw thread can be opposite with existing screw thread rotation direction commonly used, thereby improve theftproof performance.

The structure and the existing wellhead assembly of the well head main bodys on this wellhead assembly etc. are same or similar, no longer describe in detail.Well logging Guan Shangke is connected with pressure meter (6) or other loggers.

Claims (4)

1. Pithead preventing thieves device, it is characterized in that, it has well head main body (2), well head lower body part one side is communicated with well logging pipe (7), opposite side is communicated with well-flushing pipe (1), well head main body top is communicated with flowline (3), the well logging pipe, the well-flushing pipe, by clip (4) valve for guarding against theft (5) is installed respectively on the flowline, valve body (58) is arranged on valve for guarding against theft, be fixed with shell (55) on the valve body, lock body (52) is installed in the shell, there is rotation slot a plurality of lock pins (53) outer end of passing lock body, the inner is equipped with locking plate (54) by nut (59), has on the wall in the enclosure and the corresponding groove of locking plate, and the part that is shaped as of locking plate is protruded, another part is recessed.

2. Pithead preventing thieves device as claimed in claim 1, it is characterized in that, on described clip (4), a pair of clip skin (42) links together by the special-shaped nut (41) on bolt (44) and the bolt, be set with saw preventing sleeve tube (43) between bolt and the clip skin, special-shaped nut is positioned at the counterbore on the clip skin.

3. Pithead preventing thieves device as claimed in claim 2 is characterized in that, described special-shaped nut (41) be shaped as pentagon, heptagon or other special-shaped shapes.

4. Pithead preventing thieves device as claimed in claim 1 is characterized in that, has locking closure (51) to be installed in the shell (55) in described lock body (52) outside.

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