CN2495797Y

CN2495797Y - Blowout prevention on-off connector

Info

Publication number: CN2495797Y
Application number: CN 01229090
Authority: CN
Inventors: 尹旭东; 张昕; 李辉
Original assignee: 尹旭东
Priority date: 2001-06-25
Filing date: 2001-06-25
Publication date: 2002-06-19
Anticipated expiration: 2011-06-25

Abstract

The utility model relates to a blowout prevention on-off connector used for a pumping well with larger field output. The utility model solves the problem that the butt joint rate of the original on-off connector. The utility model is characterized in that a spring (5) is wrapped on a sliding sleeve (4) which is arranged on the external wall of a bit holder (2) and a circlip seat (8) is arranged at the other end of the spring (5); a circlip (6) and a lower joint (9) which are sleeved with each other on the circlip seat (8); the other end of the lower end (9) of the through hole (12) is fixed with thread on the bit holder (2). The utility model has the advantage of high butt joint rate and is suitable for being widely used in the oil field.

Description

Blowout-prevention connecting-tripping device

The utility model relates to the used on-off connector of the higher rod-pumped well of field output, belongs to sucker rod and the used blowout-prevention connecting-tripping device of oil well pump piston down-hole uncoupling.

At present the oil field is when underground work, when the external diameter of oil pump plunger piston during greater than pipe aperture, must use on-off connector to realize being connected of plunger and sucker rod and separate.And on the sliding sleeve of on-off connector commonly used aperture is arranged, and in operation process, there are booties such as sand, earth to fall into often, make on-off connector fragile, butt joint, to throw off success rate low, cause construction invalid, and intensity is low, causes easily and does over again, and influence is produced.

The purpose of this utility model is to avoid the deficiency of above-mentioned technology, and a kind of high blowout-prevention connecting-tripping device of success rate that docks is provided.

The purpose of this utility model can reach by the following technical programs: this blowout-prevention connecting-tripping device is made up of uncoupling pawl, uncoupling bar, sheath, spring, it is characterized in that: spring is wrapped on the slip cap of uncoupling bar outer wall, the spring other end has clip spring seat, on clip spring seat, have jump ring and lower contact to be nested successively, and the lower contact other end screw thread that through hole arranged is fixedly on the uncoupling bar.

The utility model has following advantage than above-mentioned prior art: since this on-off connector insert discharge head after, the uncoupling pawl is disconnected with the uncoupling bar separate, can safely sucker rod all be proposed, protected sucker rod injury-free; Stop well liquid to rise simultaneously, have the specific function of well liquid blowout prevention, the butt joint rate reaches 100%.

Accompanying drawing 1 is that the structure of the utility model disengagement blowout prevention state is cutd open figure.

Below in conjunction with accompanying drawing the utility model is further described:

As shown in Figure 1, this on-off connector is made up of uncoupling pawl 1, uncoupling bar 2, sheath 3, spring 5, and spring 5 is wrapped on the slip cap 4 of uncoupling bar 2 outer walls, and uncoupling pawl 1 internal thread connects sucker rod, uncoupling bar 2 external screw threads connect oil pump plunger piston, transmit operation power to oil pump plunger piston.Spring 5 other ends have clip spring seat 8, are sealed with sealing ring 7, have jump ring 6 and lower contact 9 to be nested on clip spring seat 8 successively, and lower contact 9 other end screw threads that through hole 12 arranged are fixedly on the uncoupling bar 2.

Before will be from the down-hole toward ground bailing oil well pump, carry on the male cone (strobilus masculinus) with sheath 3 earlier to contact with discharging 10 inner conical surface, uncoupling pawl 1 is separated with 2 disconnections of uncoupling bar, can safely sucker rod all be proposed, protected sucker rod injury-free; Simultaneously at uncoupling pawl 1 with after uncoupling bar 2 separates, jump ring 6 is released 10 an internal face blocked portion, and the sealing ring 11 on lower contact 9 outer walls is sealed, and stops well liquid to rise, and has the specific function of well liquid blowout prevention.

When uncoupling pawl 1 and uncoupling bar 2 in the docking operation of down-hole again, under the gravity of sucker rod promotes, uncoupling pawl 1 pushing uncoupling bar 2, impel sheath 3 pushing slip caps 4 axially descending, cause the through hole of slip cap 4 and the through hole 12 of lower contact 9 to form the liquid passage, thereby make the last downforce of lower contact 9 be in equilibrium state, eliminate the butt joint resistance, it is coaxial that the axis that guarantees uncoupling bar 2 and the axis of oil pipe remain, and the butt joint rate reaches 100%.

Claims

1, a kind of used blowout-prevention connecting-tripping device of the higher rod-pumped well of field output that relates to, form by uncoupling pawl (1), uncoupling bar (2), sheath (3), spring (5), it is characterized in that: spring (5) is wrapped on the slip cap (4) of uncoupling bar (2) outer wall, spring (5) other end has clip spring seat (8), on clip spring seat (8), have jump ring (6) and lower contact (9) to be nested successively, and lower contact (9) other end screw thread that through hole (12) are arranged is fixedly on the uncoupling bar (2).