CN2576956Y - Offsetting anti-theft radial polish rod sealing device - Google Patents

Abstract

The utility model relates to an offsetting theftproof radial polish rod sealing device for the seal offset and the theft prevention of an oil well polish rod. The offsetting theftproof radial polish rod sealing device comprises a casing, a piston, a spring, a push rod, a protective cover and an irregular disc root. The utility model is divided into a seal region and an offsetting region, wherein the seal region is a cross structure of an inner cylinder cavity. The irregular disc root is fixed to the top end of the piston. The inner cavity of the piston forms a stepped hole shape. The outer end of the piston is provided with one big eccentric hole. The disc root is pushed against the polish rod under the action of the push rod, the spring and the protective cover. The upmost end of a cylinder cavity at the upper part of the seal region is provided with a press cap through threads. The press cap is an inner stepped cavity and is pressed on a pressing cover which is pressed on the spring through a shoulder of the pressing cover. The spring is arranged on an inner circular ring shoulder of the casing. The downmost end of the pressing cover is tightly pressed on the irregular disc root. The seal region adopts two-stage seal. A copper sleeve is arranged on each stage of seal. An inner thread sheath is arranged on the outer side of the gland nut of the offsetting region. A theftproof screw is tightened on a joint through the sheath.

Description

The antitheft radially polished rod sealer of tuningout

Technical field the utility model relates to a kind of polished rod sealer to there being bar production wellhead polished rod to seal.

Background technology adopts the sucker rod pumping device mostly in the oil-gas mining process, wherein the used oil well sealing device of the sucker rod pumping well more than 98% is plain edition polished rod sealer (promptly conventional fixed).In process of production, the plain edition wellhead polish rod sealer has exposed can not be coaxial such as polished rod and well head, eccentric wear seriously causes sealing frequent failure, the packing life-span is short, and crude oil runs and leaks contaminated environment, the often tight packing of oil recovery workman, stop well and change problems such as packing, thereby oil well production efficient is reduced greatly, influenced crude output.Simultaneously, also because oil production equipment is located in the field, and social security is bad, and well head is often dismantled, crude oil is stolen.Therefore design a kind of new type of rod sealing unit, have the tuningout function, make polished rod and well head coaxial, do not stop well and change packing, reduce and change the packing number of times, improve rate when gathering, have anti-theft feature simultaneously, become extremely important.

Summary of the invention is to be solved in the utility model to be exactly that wellhead polish rod sealing is not firm, eccentric wear and well head are easily dismantled this technical problem.The utility model is achieved in that the antitheft radially polished rod sealer of tuningout, and it comprises housing, piston, spring, protecting cover, special-shaped packing, joint, clamp nut.It divides two parts, top is seal area, the bottom is the tuningout district, seal area is interior cylindrical cavity criss-cross construction, cylindrical cavity central authorities in the horizontal direction are equipped with special-shaped packing, cylindrical cavity left and right sides structure is identical, piston is installed in cylindrical cavity, piston tip has cross recess, there is a cross convex tendon in the special-shaped packing outside, this cross convex tendon is bumped in this cross recess, screw is fastened on special-shaped packing on the piston, piston cavity is stepped cylindrical hole, the centre is a macropore, also be processed with a large eccentricity hole on the piston section, the large eccentricity hole communicates with the outermost shoulder hole of piston, push rod is a stepped push rod, push rod enters piston cavity by the large eccentricity hole, and be seated on the shoulder hole of piston section, the spring outer end is enclosed within on the multidiameter of push rod, and withstanding on the thrust step of push rod and the piston cavity bottom surface, spring be pair forward and reverse springs, is processed with gathering sill on piston, guider screw is placed in one by the screwed hole on the housing, and protecting cover links to each other with housing with push rod respectively by screw thread.Seal area is last, the two-stage sealing that following structure is identical, be cross-shaped, in cylindrical cavity bottom, upper level seal area upper end one annulus boss is arranged, spring is sitting on the boss, the copper sheathing gland is pressed on the spring by its top convex shoulder, pressure cap is by being threaded in the top of seal area housing, and be pressed on the copper sheathing gland, copper sheathing gland bottom is pressed in special-shaped packing top, pressure cap is interior cylinder stepped cavity, be connected with mozzle in pressure cap one side, mark closely screw and be tightened on the pressure cap by the aperture on the housing, gland water conservancy diversion district is by pressure cap, mozzle, mark closely screw, gland, spring is formed jointly; Lower end at the upper level seal area is equipped with copper sheathing, at the upper/lower terminal of next stage seal area copper sheathing is installed all.Bottommost at seal area is the tuningout district, it comprises clamp nut, joint, anti-theft screw, housing is sitting on the joint, clamp nut is pressed on the shoulder of housing bottom, and with joint by being threaded togather, side at nut is equipped with the internal thread sheath, and anti-theft screw is pressed on the joint by the silk hole on the clamp nut.The utility model adopts from polished rod radial seal polished rod, and same structure is formed orthogonal two-stage up and down.Upper level compresses seal from axially assisting, and improves sealing load.During operate as normal, only use upper level.When upper level need be changed, tighten next stage, replace with primary seal spare, thereby realize that not stopping well changes packing from both sides.Each position is exposed movable part and is all adopted on the special tool and unload, thereby realizes anti-theft feature.Polished rod seal is made two parts up and down, can move radially, thereby guarantee that well head is coaxial with polished rod.Seal has guaranteed certain sealing load by two forward and reverse spring compressions, has certain elastic buffer simultaneously, thereby prolongs the life-span of seal.Leave cavity and mozzle in the gland of topmost.When bringing into use, in cavity, inject butter, reduce the wearing and tearing of polished rod to seal.When a small amount of crude oil spills, import ground by mozzle, prevent to pollute well head, and reduce working strength.In the middle of the first half of housing, stud with the brass bushing very little, guarantee that polished rod is coaxial with housing top, seal is contacted with polished rod well, improve sealing effectiveness with the polished rod gap.

Appended drawings 1 is a structural representation of the present utility model.1-pressure cap, 2-mozzle, 3-are marked closely screw, 4-gland, 5-spring, 6-guider screw, 7-push rod, 8-spring, 9-screw, 10-protecting cover, 11-piston, 12-special-shaped packing, 13-copper sheathing, 14-housing, 15-clamp nut, 16-joint, 17-anti-theft screw among the figure.

Specific embodiment the utility model is mainly formed top seal district, bottom tuningout district by two parts up and down.Seal area is made up of gland water conservancy diversion district, primary seal district, secondary seal district.Gland water conservancy diversion district by pressure cap (1), mozzle (2), mark closely screw (3), gland (4), spring (5) and form.Pressure cap has cylindrical cavity in (1), is used to store butter, and gland (4) is a brass spare, and spring (5) is used for gland (4) and upwards resets, and marks closely screw (3) and is used for antitheft.I and II seal area structure is identical, is made up of protecting cover (10), special-shaped packing (12), screw (9), forward and reverse dual spring (8), push rod (7), guider screw (6).Protecting cover (10) is a collar plate shape, and is concordant with shell after tightening, and prevents to steal to unload.Forward and reverse dual spring is used for increase advancing elastic force, guarantees piston (11), special-shaped packing (12) is in can be dynamic.There is eccentric macropore piston (11) upper end, and push rod (7) is directly put into by the eccentric macropore on the piston (11), and is easy to loading and unloading.Guider screw (6) extremely prevents to steal with the shell weldering.Copper sheathing (13) is used to set upright polished rod in the centre position, and special-shaped packing (12) is cooperated closely with polished rod.Abnormity packing (12) is a disc, and one side is the cross boss, is used for radial location.Another side has and polished rod adaptation half slot, and the half slot both sides are porose, are used for being connected with piston (11), and material is a specific rubber.The seal area one-level is an ordinary production usefulness, and secondary is that sealing is used when changing special-shaped packing (12).Push rod outer end endoporus is a big hole and an eccentric aperture, with the special tool dismounting, prevents to steal and twists.

Tuningout district, bottom is made up of clamp nut (15), joint (16), anti-theft screw (17).Circular bore between clamp nut (15) and the housing (14) is used for tuningout and uses, in clamp nut (15) boosting-rod, adorn a screw special, the screw endoporus is identical with the push rod inner hole structure, be used for the antitheft clamp nut (15) of dismantling after tightening, joint can be made the card palaiotype, and the oil pipe box links to each other with well head with oil pipe pin thread formula.

The utility model adopts the sealing of radial compaction two-stage, tuningout, burglar-proof mechanism and water conservancy diversion butter district.Thereby realize antitheft, do not stop well and change packing and tuningout function, prevent that crude oil from overflowing to ground.Thereby improve crude oil production efficient, reduced environment pollution.Reduced cost of production.Owing to there is butter lubricated, adopt positive and negative dual spring to compress, structures such as copper sheathing centering, main body tuningout have prolonged application life of seal greatly.The utility model can be applicable to the sealing of high-low pressure oil gas well, and simple and reasonable, and advanced technology is easy to operate, reliable operation, and working strength reduces.

Claims (7)

1, the antitheft radially polished rod sealer of tuningout, it comprises housing, piston, spring, protecting cover, special-shaped packing, joint, clamp nut, it is characterized in that it is divided into two parts, top is seal area, the bottom is the tuningout district, seal area is interior cylindrical cavity criss-cross construction, cylindrical cavity central authorities in the horizontal direction are equipped with special-shaped packing (12), cylindrical cavity left and right sides structure is identical, piston (11) is installed in cylindrical cavity, screw (9) is fastened on special-shaped packing on the piston (11), piston cavity is stepped cylindrical hole, the centre is a macropore, also be processed with a large eccentricity hole on the outer section of piston, the large eccentricity hole communicates with the outermost shoulder hole of piston, push rod (7) is a stepped push rod, push rod enters piston cavity by the large eccentricity hole, and be seated on the shoulder hole of piston section, spring (8) outer end is enclosed within on the multidiameter of push rod, and withstand on the thrust step of push rod and the piston cavity bottom surface, on piston, be processed with gathering sill, guider screw (6) is placed in one by the screwed hole on the housing (14), and protecting cover (10) links to each other with housing (14) with push rod (7) respectively by screw thread.

2, the antitheft radially polished rod sealer of tuningout according to claim 1 is characterized in that piston tip has cross recess, and there is a cross convex tendon in the special-shaped packing outside, and this cross convex tendon is bumped in this cross recess.

3, the antitheft radially polished rod sealer of tuningout according to claim 1 is characterized in that described spring (8) is two forward and reverse springs.

4, the antitheft radially polished rod sealer of tuningout according to claim 1 is characterized in that seal area is the identical two-stage sealing of upper and lower structure, and is cross-shaped.

5, the antitheft radially polished rod sealer of tuningout according to claim 2, it is characterized in that, in upper level seal area top cylindrical cavity bottom one annulus boss is arranged, spring (5) is sitting on the boss, copper sheathing gland (4) is pressed on the spring (5) by its top convex shoulder, pressure cap (1) is by being threaded in the top of seal area housing (14), and be pressed on the copper sheathing gland (4), copper sheathing gland (4) bottom is pressed on the special-shaped packing (12), pressure cap (1) is interior cylinder stepped cavity, be connected with mozzle (2) in pressure cap one side, mark closely screw (3) and be fixed on the pressure cap (1) by the aperture on the housing (14), gland water conservancy diversion district is by pressure cap (1), mozzle (2), mark closely screw (3), gland (4), spring (5) is common to be formed; Copper sheathing (13) is installed in the lower end of upper level seal area.

6, the antitheft radially polished rod sealer of tuningout according to claim 2 is characterized in that at the upper/lower terminal of next stage seal area copper sheathing (13) being installed all.

7, the antitheft radially polished rod sealer of tuningout according to claim 1, it is characterized in that the bottommost at seal area is the tuningout district, it comprises clamp nut (15), joint (16), anti-theft screw (17), housing (14) is sitting on the joint (16), clamp nut (15) is pressed on the shoulder of housing (14) bottom, and with joint (16) by being threaded togather, side at nut is equipped with the internal thread sheath, and anti-theft screw (17) is pressed on the joint (16) by the silk hole on the clamp nut.

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