CN202000946U - A new wellhead double sealing box - Google Patents

Abstract

The novel wellhead double-sealing box is applied to sealing of oil extraction wellheads in oil fields. The bottom of the upper sealing cylinder is provided with an annular step, and a one-way valve is fixed on the wall of the upper sealing cylinder; the lower end of the upper sealing cylinder is in threaded connection with the upper end of the direction-adjusting sealing cylinder; the upper part of the direction-adjusting sealing cylinder is cylindrical, and the lower part of the direction-adjusting sealing cylinder is spherical; a group of lower packing is arranged in an annular space at the upper end of the direction-adjusting sealing cylinder, a ball body at the lower part of the direction-adjusting sealing cylinder is arranged in a spherical concave surface of the ball head seat, the upper part of the ball head seat is connected with a ball head gland through threads, and the ball body at the lower part of the direction-adjusting sealing cylinder is fixed in the ball head seat through the ball head gland. The effect is as follows: have the tuningout function and have the double containment packing, can be for pouring into lubricating oil between two sealed packings, the lubricating oil lubrication polished rod improves the sealing performance of packing, reduces rubber packing wearing and tearing, extension rubber packing life-span.

Description

A kind of novel well head double containment box

Technical field

The utility model relates to oil recovery technique field, oil field, and particularly a kind of production wellhead seal box is a kind of tuningout double containment well head packing box.

Background technology

Oil pumper drives the rod string wander up and down, makes the interior oil well pump work of oil well that crude oil is lifted to well head.At present, the oil well mouth all adopts sealed packing in order to seal polished rod.Oil pumping polish rod seals in packing box and by the rubber packing in the packing box (or packing of other type).Rubber packing and polished rod ceaselessly rub, and reduce packing application life.In addition, polished rod and well head eccentric wear have more increased the friction of polished rod and skin packing.In case it is untimely that the rubber packing damages the leakage of oil discovery, can cause crude oil to run off, pollute wellhead equipment, increase personnel's workload.

The utility model content

The purpose of this utility model is: a kind of novel well head double containment box is provided, have the tuningout function and the double containment packing is arranged, can be for injecting lubrication oil between two sealed packings, reach the sealing performance that improves packing, thereby reduce the wearing and tearing of rubber packing, prolong the rubber packing life-span, stop to find the risk of the untimely crude oil pollution well head that causes simultaneously, reduce the well maintenance workload because of the leakage of oil of rubber packing.

The technical solution adopted in the utility model is: novel well head double containment box, mainly form by upper press cover, compact heap, upper seal bore, last packing, cushion block, one way valve, briquetting, following packing, tuning sealing drum, bulb gland, ball cup and Gask-O-Seal; An annular cushion block is arranged on the base circle step of upper seal bore, in upper seal bore and on the top of annular cushion block, packing on a group is arranged, be connected with a upper press cover, annular compact heap is arranged on the top of last packing in the screw top of upper seal bore; After screwing upper press cover, compact heap can compress packing, makes packing play the effect of sealing polished rod.It is characterized in that: ring-shaped step is arranged at the bottom of upper seal bore, is fixed with screw on wall, and the position of screw is on ring-shaped step, and the inner UNICOM of screw and upper seal bore is fixed with an one way valve on screw.Can be by one way valve to the inner stop-leak compound that injects of upper seal bore.The upper seal bore lower end is threaded in tuning sealing drum upper end; Described tuning sealing drum top is the cylinder bodily form, and the bottom is a spheroid; The tuning sealing drum has centre bore, the tuning sealing drum centre bore that polished rod can pass.There is annular space the upper end of tuning sealing drum, in the annular space of tuning sealing drum upper end packing under a group is arranged, and at the top of following packing annular briquetting is arranged, and the ring-shaped step lower plane of upper seal bore is pressed in the top of briquetting; Screw upper seal bore, upper seal bore compress briquetting, briquetting compresses down packing, makes down packing play the effect of sealing polished rod.To the inner stop-leak compound that injects of upper seal bore, polished rod is lubricated by one way valve.The spheroid of tuning sealing drum bottom is in the spherical concave surface of ball cup, and by the bulb gland that has been threaded, the bulb gland is fixed on the spheroid of tuning sealing drum bottom in the ball cup on the top of ball cup.In ball cup and in the spheroid bottom of tuning sealing drum, a Gask-O-Seal is arranged.Ball cup has centre bore, in the lower end of ball cup screw thread is arranged, and can be connected on the well head.The spheroid of tuning sealing drum bottom cooperates with ball cup that to adjust well inclined to one side.

The beneficial effects of the utility model: the novel well head double containment of the utility model box, have the tuningout function and the double containment packing is arranged, can be for injecting lubrication oil between two sealed packings, the oil lubrication polished rod, improve the sealing performance of packing, reduce the wearing and tearing of rubber packing, prolong the rubber packing life-span, stop to find the risk of the untimely crude oil pollution well head that causes simultaneously, reduce the well maintenance workload because of the leakage of oil of rubber packing.

Description of drawings

Fig. 1 is the novel well head double containment of a utility model box structural profile schematic diagram.

Among the figure, 1-upper press cover, 2-compact heap, 3-upper seal bore, the last packing of 4-, 5-cushion block, 6-one way valve, 7-briquetting, packing under the 8-, 9-tuning sealing drum, 10-bulb gland, 11-ball cup, 12-Gask-O-Seal, 13-polished rod.

The specific embodiment

Embodiment 1: with a novel well head double containment box is example, and the utility model is described in further detail.

Consult Fig. 1.The novel well head double containment of the utility model box mainly is made up of upper press cover 1, compact heap 2, upper seal bore 3, last packing 4, cushion block 5, one way valve 6, briquetting 7, following packing 8, tuning sealing drum 9, bulb gland 10, ball cup 11 and Gask-O-Seal 12.An annular cushion block 5 is arranged on the base circle step of upper seal bore 3, in upper seal bore 3 and on the top of annular cushion block 5 packing 4 on a group is arranged, last packing 4 is made up of 8 ring-shaped rubber packings.Screw top at upper seal bore 3 is connected with a upper press cover 1, and upper press cover 1 has centre bore, and polished rod 13 can pass through centre bore.Annular compact heap 2 is arranged on the top of last packing 4.

Ring-shaped step is arranged at the bottom of upper seal bore 3, is fixed with the M8 screw on wall, and the position of screw is on ring-shaped step, and screw and upper seal bore 3 inner UNICOMs are fixed with an one way valve 6 (oil nozzle) on screw.Upper seal bore 3 lower ends are threaded in tuning sealing drum 9 upper ends.Described tuning sealing drum 9 tops are the cylinder bodily form, and the bottom is a spheroid; Tuning sealing drum 9 has centre bore, tuning sealing drum 9 centre bores that polished rod 13 can pass.There is annular space the upper end of tuning sealing drum 9, in tuning sealing drum 9 upper end annular spaces packing 8 under a group is arranged, and following packing 8 is made up of 7 ring-shaped rubber packings.Annular briquetting 7 is arranged at the top at following packing 8, and the ring-shaped step lower plane of upper seal bore 3 is pressed in the top of briquetting 7.The spheroid of tuning sealing drum 9 bottoms is in the spherical concave surface of ball cup 11, and by the bulb gland 10 that has been threaded, bulb gland 10 has centre bore on the top of ball cup 11.Bulb gland 10 is fixed on the spheroid of tuning sealing drum 9 bottoms in the ball cup 11.In ball cup 11 and in the spheroid bottom of tuning sealing drum 9, a Gask-O-Seal 12 is arranged.Ball cup 11 has centre bore, in the lower end of ball cup 11 screw thread is arranged.Polished rod 13 passes ball cup 11, Gask-O-Seal 12, tuning sealing drum 9, following packing 8, briquetting 7, cushion block 5, goes up packing 4, compact heap 2 and upper press cover 1.

Claims (1)

1. A new type of wellhead double-seal box, mainly composed of an upper gland (1), a compression block (2), an upper sealing cylinder (3), an upper packing (4), a spacer (5), a one-way valve ( 6), the briquetting block (7), the lower packing (8), the adjustment sealing cylinder (9), the ball gland (10), the ball seat (11) and the annular gasket (12); There is an annular gasket (5) on the bottom annular step of the sealing cylinder (3), and there is a set of upper packing (4) in the upper sealing cylinder (3) and on the upper part of the annular gasket (5), on the upper sealing cylinder ( 3) There is an upper gland (1) in the top threaded connection, and an annular compression block (2) is arranged on the upper part of the upper packing (4); it is characterized in that: there is an annular step at the bottom of the upper sealing cylinder (3). A screw hole is fixed on the wall, the position of the screw hole is on the annular step, the screw hole communicates with the inside of the upper sealing cylinder (3), and a check valve (6) is fixed on the screw hole; the lower end of the upper sealing cylinder (3) is threaded Connected to the upper end of the adjustment sealing cylinder (9); the upper part of the adjustment sealing cylinder (9) is cylindrical, and the lower part is a sphere; the adjustment sealing cylinder (9) has a central hole through which the polished rod (13) can pass. There is an annular space at the upper end of the adjustable sealing cylinder (9), and there is a group of lower packings (8) in the annular space at the upper end of the adjustable sealing cylinder (9). There is an annular briquetting block (7) on the top, and the lower plane of the annular step of the upper sealing cylinder (3) is pressed against the upper part of the briquetting block (7); Inside, a ball gland (10) is threadedly connected to the top of the ball socket (11), and the ball gland (10) fixes the ball that is adjusted to the lower part of the sealing cylinder (9) in the ball socket (11) There is an annular seal (12) in the ball seat (11) and at the spheroid bottom of the adjustment seal cylinder (9); the ball seat (11) has a central hole, and the lower end of the ball seat (11) has a thread. the

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