CN203640662U

CN203640662U - Oil well rod breakage blowout preventer

Info

Publication number: CN203640662U
Application number: CN201320809534.XU
Authority: CN
Inventors: 段鹏飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-10
Filing date: 2013-12-10
Publication date: 2014-06-11
Anticipated expiration: 2023-12-10

Abstract

The utility model discloses an oil well rod breakage blowout preventer. The oil well rod breakage blowout preventer comprises a shell with a sealed cavity, an upper through hole and a lower through hole for allowing a polish rod to penetrate through are formed in the shell, a steel ball and an anti-abrasion block are arranged in the cavity, wherein the steel ball is used for sealing the upper through hole, and the anti-abrasion block is used for preventing the steel ball from making contact with the polish rod and can slide left and right, a middle through hole for allowing the polish rod to penetrate through is formed in the middle of the anti-abrasion block, and a spring for pushing the steel ball to the portion below the upper through hole after the polish rod is broken is arranged between the steel ball and the side wall of one end of the cavity. The oil well rod breakage blowout preventer has the advantages that the anti-abrasion block makes contact with the polish rod, and therefore the polish rod cannot be abraded, the service life of the polish rod is guaranteed, the steel ball is protected from abrasion in a non-working state, and it is guaranteed that the steel ball can accurately seal a well mouth when coming into play.

Description

The oil well bar blowout hookup that breaks

Technical field

The utility model relates to the disconnected bar blowout hookup of oil well.

Background technology

At present oil field beam pumping unit oil pumping all adopts polished rod to pump petroleum lifting to ground, and the place that the top of polished rod is connected with polished rod eye in actual production can be because situation tired and that generation is ruptured.Once polished rod fracture will vertically fall to falling among well casing, because will making petroliferous well liquid, back pressure pressure in well causes the major accident of blowout from well head ejection subsequently.In order to prevent causing gas blowout accident after polished rod fracture, people have also thought the way of a lot of automatic pluggings, such as the broken polish rod sealer in oil well by name of notification number CN2440974Y, when polished rod normally moves usually, steel ball one end heads on polished rod, the other end is subject to the thrust of spring, when after polished rod fracture, steel ball is subject to spring force to polished rod one lateral movement, and under the pressure-acting of oil well liquid, heads into rapidly the headroom of polished rod recreation room, by top passageway sealing, prevent the generation of gas blowout accident.But when polished rod does not rupture, under theory state, steel ball and polished rod are rolling friction, in fact push away and the impact of greasy dirt owing to squeezed by spring force, steel ball can't rotate, cause steel ball and polished rod between the two because friction causes damage.Because polished rod back and forth moves and reaches up to ten thousand times every day, the wearing and tearing between polished rod and steel ball will be very severe.Not being that polished rod is worn and torn by photosphere and make it cannot excellent sealing with wellhead sealing part (packing), is exactly that steel ball is ground gap by polished rod, still can spray from gap once there is blowout well liquid, does not therefore reach the object of shutoff blowout.

Utility model content

The purpose of this utility model is to provide the oil well bar blowout hookup that breaks, and can effectively solve the disconnected bar blowout hookup of existing pumpingh well and have the problem of damaging polished rod or sealed steel ball and cannot reach because of wearing and tearing sealing effectiveness.

In order to address the above problem, the utility model is achieved through the following technical solutions: the oil well bar blowout hookup that breaks, comprise the housing with sealed chamber, on described housing, have the upper through hole and the lower through-hole that pass for polished rod, in described chamber, being provided with sealing goes up the steel ball of through hole, prevents the anti-abrading block that steel ball contacts with polished rod and can horizontally slip, described anti-abrading block middle part has the middle through hole passing for polished rod, is provided with when the spring of after polished rod fracture, steel ball being shifted onto to upper through hole below between described steel ball and chamber one end sidewall.

Preferably, the tail end of described anti-abrading block contacts with steel ball, the rear portion of described anti-abrading block has the first guiding gutter that middle through hole is communicated with anti-abrading block afterbody place chamber, and the rear portion of described anti-abrading block also has the 3rd guiding gutter that anti-abrading block afterbody place chamber is communicated with upper through hole; In the middle of through hole overlap area with upper through hole and lower through-hole more and more hour, the oil coming on lower through-hole will flow in the chamber on right side through the first guiding gutter, and then flow to upper through hole by the 3rd guiding gutter, now will give thrust of anti-abrading block, offset because of the middle through hole resistance that area reduces to bring that overlaps with upper lower through-hole, be convenient to anti-abrading block position is allowed to the steel ball energy shutoff well head of sening as an envoy to.

Preferably, the front end of described anti-abrading block has the second guiding gutter that abrasionproof build portion place chamber is communicated with middle through hole; The cavity indoor pressure energy and the oil well internal pressure balance that make abrasionproof build portion, prevent that the anti-abrading block of the excessive obstruction of abrasionproof build portion place cavity indoor pressure from moving.

Preferably, on described chamber inner wall, have gathering sill, described anti-abrading block is provided with the guide pad suitable with gathering sill; In the time of the motion of polished rod fracture abrasionproof piece, can play good guide effect, prevent that anti-abrading block is stuck in chamber.

Preferably, in described anti-abrading block rear portion, be provided with and extend into the roller contacting with polished rod in middle through hole; Be set to rolling friction, reduce wearing and tearing.

Preferably, described anti-abrading block is made up of left and right, and the anti-abrading block at described middle through hole rear is provided with the groove that holds roller, all has the counterbore passing for roller shaft on described left and right, and described roller shaft all has screwed hole along two ends, axis left and right; Both can fixed idler whell, left and right can be fixed again, counterbore can conveniently be ensconced bolt head wherein simultaneously.

Preferably, the bottom of described upper through hole and steel ball are suitable; Form sealing to better coordinate with steel ball.

Preferably, described housing comprises upper casing and lower casing, and described upper casing and lower casing are bolted, and between described upper casing and lower casing, is provided with sealing ring; Be convenient to safeguard and install.

Compared with prior art; the utility model has the advantages that: anti-abrading block is contacted with polished rod, can be to wearing and tearing polished rod, the application life of the polished rod of guarantee; protect again steel ball also can not wear and tear under off working state, ensured that steel ball can accurately seal well head in the time playing a role.

Brief description of the drawings

Fig. 1 is the structural representation of the disconnected bar blowout hookup of the utility model oil well;

Fig. 2 is the structural representation of anti-abrading block in the disconnected bar blowout hookup of the utility model oil well;

Fig. 3 is A-A sectional view in Fig. 2;

Fig. 4 is B-B sectional view in Fig. 2.

Detailed description of the invention

Consult Fig. 1, Fig. 2 is the embodiment of the disconnected bar blowout hookup of the utility model oil well, the oil well bar blowout hookup that breaks, comprise the housing 2 with sealed chamber 1, on described housing 2, have the upper through hole 4 and the lower through-hole 5 that pass for polished rod 3, in described chamber 1, be provided with the steel ball 6 of the upper through hole 4 of sealing, prevent the anti-abrading block 7 that steel ball 6 contacts and can horizontally slip with polished rod 3, described anti-abrading block 7 middle parts have the middle through hole 8 passing for polished rod 3, between described steel ball 6 and chamber 1 one end sidewall, be provided with when the spring 9 of after polished rod 3 fractures, steel ball 6 being shifted onto to upper through hole 4 belows, on described chamber 1 inwall, have gathering sill 13, described anti-abrading block 7 is provided with the guide pad 14 suitable with gathering sill 13, the bottom of described upper through hole 4 and steel ball 6 are suitable, described housing 2 comprises upper casing 21 and lower casing 22, described upper casing 21 is connected by bolt 23 with lower casing 22, between described upper casing 21 and lower casing 22, be provided with sealing ring 24.

The tail end of described anti-abrading block 7 contacts with steel ball 6, the rear portion of described anti-abrading block 7 has the first guiding gutter 10 that middle through hole 8 is communicated with anti-abrading block 7 afterbody place chambers 1, the rear portion of described anti-abrading block 7 also has the 3rd guiding gutter 11 that anti-abrading block 7 afterbody place chambers 1 are communicated with upper through hole 4, the front end of described anti-abrading block 7 has the second guiding gutter 12 that anti-abrading block 7 head place chambers 1 are communicated with middle through hole 8, in described anti-abrading block 7 rear portions, be provided with and extend into the roller 15 contacting with polished rod 3 in middle through hole 8, as shown in Figure 4, described anti-abrading block 7 forms by left 16 and right 17, the anti-abrading block 7 at described middle through hole 8 rears is provided with the groove 18 that holds roller 15, on described left 16 and right 17, all have the counterbore 19 passing for roller shaft 25, described roller shaft 25 all has screwed hole 20 along two ends, axis left and right, be fixedly connected with by bolt 23, as shown in Figure 3, the front portion of anti-abrading block 7 is also connected with the bolt 23 that is screwed into respectively connecting rod two by tapped connecting rod, the afterbody of anti-abrading block 7 and head are all provided with tapered slope 26, so that better motion.

When mounted, first upper casing 21 and lower casing 22 are separated, roller 15 is arranged in the groove 18 between left 16 and right 17, then the two ends of roller shaft 25 are screwed into by bolt 23, fixed roller shaft 25, also left 16 and right 17 has been fixed together, in forming between left 16 and right 17, through hole 8 is embraced polished rod 3 simultaneously, then setting spring 9 and steel ball 6, upper casing 21 and lower casing 22 are fixed together by bolt 23.In the time making regular check on, need to take the abrasion condition of checking roller 15 apart.

Anti-abrading block 7 adopts the material lower than polished rod 3 hardness to make, and when polished rod 3 normally vertically moves back and forth usually, the roller 15 of anti-abrading block 7 contacts with polished rod 3, forms rolling friction, in the time that polished rod 3 ruptures, be subject to spring 9 elastic force effects, anti-abrading block 7 is moved to the left, in the middle of through hole 8 overlap area with upper through hole 4 and lower through-hole 5 more and more hour, the oil coming on lower through-hole 5 will flow in the chamber 1 on right side through the first guiding gutter 10, and then flow to upper through hole 4 by the 3rd guiding gutter 11, now will give 7 one of anti-abrading blocks thrust left, offset because of middle through hole 8 resistance that area reduces to bring that overlaps with upper lower through-hole 5, liquid in left chamber 1 is also by through hole 8 in the second guiding gutter 12 inflows simultaneously, thereby be convenient to left chamber 1 internal pressure and extraneous balance and can not produce resistance, along with anti-abrading block 7 continues to left movement, steel ball 6 finally moves to the below of through hole 4, moved upward by the pressure of liquid to be below stuck in the bottom of through hole 4 that upper through hole 4 is sealed, thereby reach the object that prevents blowout.In this device, anti-abrading block 7 and polished rod 3, can be to wearing and tearing polished rods 3 all the time in rolling friction state, and in the application life of the polished rod 3 of guarantee, steel ball 6 also can not wear and tear under off working state simultaneously, has ensured that steel ball 6 can accurately seal well head in the time playing a role.

The foregoing is only specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this, any those skilled in the art is in field of the present utility model, and the variation of doing or modification are all encompassed among the scope of the claims of the present utility model.

Claims

1. the disconnected bar blowout hookup of oil well, it is characterized in that: the housing (2) that comprises band sealed chamber (1), on described housing (2), have the upper through hole (4) and the lower through-hole (5) that pass for polished rod (3), in described chamber (1), be provided with the steel ball (6) of the upper through hole (4) of sealing, prevent the anti-abrading block (7) that steel ball (6) contacts and can horizontally slip with polished rod (3), described anti-abrading block (7) middle part has the middle through hole (8) passing for polished rod (3), between described steel ball (6) and chamber (1) one end sidewall, be provided with when the spring (9) of after polished rod (3) fracture, steel ball (6) being shifted onto to upper through hole (4) below.

2. the disconnected bar blowout hookup of oil well as claimed in claim 1, it is characterized in that: the tail end of described anti-abrading block (7) contacts with steel ball (6), the rear portion of described anti-abrading block (7) has the first guiding gutter (10) that middle through hole (8) is communicated with anti-abrading block (7) afterbody place chamber (1), and the rear portion of described anti-abrading block (7) also has the 3rd guiding gutter (11) that anti-abrading block (7) afterbody place chamber (1) is communicated with upper through hole (4).

3. the disconnected bar blowout hookup of oil well as claimed in claim 2, is characterized in that: the front end of described anti-abrading block (7) has the second guiding gutter (12) that anti-abrading block (7) head place chamber (1) is communicated with middle through hole (8).

4. the disconnected bar blowout hookup of oil well as claimed in claim 2 or claim 3, is characterized in that: on described chamber (1) inwall, have gathering sill (13), described anti-abrading block (7) is provided with the guide pad (14) suitable with gathering sill (13).

5. the disconnected bar blowout hookup of oil well as claimed in claim 1, is characterized in that: in described anti-abrading block (7) rear portion, be provided with and extend into the roller (15) contacting with polished rod (3) in middle through hole (8).

6. the disconnected bar blowout hookup of oil well as claimed in claim 5, it is characterized in that: described anti-abrading block (7) is made up of left (16) and right (17), the anti-abrading block (7) at described middle through hole (8) rear is provided with the groove (18) that holds roller (15), on described left (16) and right (17), all have the counterbore (19) passing for roller shaft (25), described roller shaft (25) all has screwed hole (20) along two ends, axis left and right.

7. the disconnected bar blowout hookup of oil well as claimed in claim 1, is characterized in that: the bottom of described upper through hole (4) and steel ball (6) are suitable.

8. the disconnected bar blowout hookup of oil well as claimed in claim 1, it is characterized in that: described housing (2) comprises upper casing (21) and lower casing (22), described upper casing (21) is connected by bolt (23) with lower casing (22), between described upper casing (21) and lower casing (22), is provided with sealing ring (24).