CN203515409U

CN203515409U - Device for preventing electric submersible pump from falling into well

Info

Publication number: CN203515409U
Application number: CN201320603027.0U
Authority: CN
Inventors: 师世刚; 张学斌; 殷红雯; 史忠武; 朴京爱; 谭英杰; 倪晗
Original assignee: Daqing Petroleum Administration Bureau; China National Petroleum Corp
Current assignee: Daqing Petroleum Administration Bureau; China National Petroleum Corp
Priority date: 2013-09-27
Filing date: 2013-09-27
Publication date: 2014-04-02
Anticipated expiration: 2023-09-27

Abstract

The utility model relates to a device for preventing an electric submersible pump from falling into a well, and the device solves the problem that when an electric submersible pump used at present carries out deep well operation, there is no device for effectively preventing a combined component or a whole machine from falling. The electric submersible pump is mainly composed of an oil distributing pup joint, an upper connector, a clamping and centering assembly, a center pipe and a lower connector, and the clamping and centering assembly is composed of a slip, a shroud ring, a spring, a slip suspension part, a fixing pin, a rail ring, a reversing pin, a protection cover and other components. When an electric submersible pump unit or the connecting components on the upper portion of the electric submersible pump unit are accidentally fractured, a slip expanding mechanism of the device for preventing the electric submersible pump from falling into the well expands in time and is supported by the inner wall of a casing pipe to finish seat clamping and prevent the electric submersible pump unit from falling into the bottom of the well. During salvaging, an oil pipe is lifted upwards to enable slip teeth to be separated from the casing pipe to be placed away, and therefore the slip releasing is finished. The wedge expanding method is adopted, the radial pressure is large, the falling prevention function is reliable, the slip releasing is convenient, and the salvaging, well repairing and other economical losses caused by the fact that the electric submersible pump unit falls into the bottom of the well are effectively reduced.

Description

Submersible electric pump preventing from falling into well device

Technical field

The utility model relates to downhole tool field in oil extraction in oil field engineering, particularly a kind of submersible electric pump preventing from falling into well device.

Background technology

The general geology inclement condition in China oil field, development difficulty is large.Electric Submersible Pump Unit is in high temperature, the running of hyperbaric environment high speed, be subject to the long-term erosion of the media such as oil, gas, water, sand, wax, corrosive substance, meanwhile, because motor itself runs up, cause Electric Submersible Pump Unit vibration, wearing and tearing etc., cause the junction of equipment come off or rupture.Once there is Electric Submersible Pump Unit junction, come off or rupture, electric pump unit will continue to fall, and causes unit secondary to damage and pollutes oil well, must salvage.The degree of depth that drops is larger, and unit damages more serious, and salvaging difficulty and salvaging cost are higher, even salvage unsuccessfully, have a strong impact on field produces, cause very large economic loss.

From grasped material, find out up to the present, when each oil field is used Electric Submersible Pump Unit to carry out heavy duty service, also do not have highly effective device to be used for preventing each building block of electric pump unit or the complete machine shaft bottom of dropping.

Summary of the invention

The purpose of this utility model is to provide a kind of submersible electric pump preventing from falling into well device, guarantees that disconnected de-Electric Submersible Pump Unit can not sink to shaft bottom, and protection unit, reduces salvaging, upkeep operation cost and activity duration, enhances productivity.

For achieving the above object, the technical solution adopted in the utility model is: a kind of submersible electric pump preventing from falling into well device, comprise and join oily short circuit, top connection, clamping righting assembly, central tube and lower contact, wherein, the upper and lower port of joining oily short circuit arranges respectively external screw thread, the sidewall of joining oily short circuit arranges opening, joins oily short circuit lower thread and connects top connection; Described top connection, its lower port is threaded with central tube, and the lower semisection sidewall of top connection is the conical surface; Described clamping righting assembly, comprise some slips, garter spring, spring, slips extension, pin, orbit ring, commutation pin and sheath, slips hanging sleeve is connected on the outside of central tube, some slips are circumferentially uniform along central tube, the upper port of slips is made as cone mouth, corresponding with the conical surface of top connection, the lower end of slips is embedded in the groove that slips hangs and further by garter spring, fixes, fixing spring between slips and slips extension; The lower end that slips is hung is fixedly connected with sheath by pin, and the intracavity bottom of sheath is equipped with orbit ring, is fixed with commutation pin on orbit ring, the vertical chute composition sliding pair of this commutation pin and central tube, the lower contact that is threaded of the lower end of central tube.

Beneficial effect:

1, adopt wedge device for spreading, large, the anti-lost reliable in function of radial pressure, unfreezing conveniently, do not affect job schedule;

2, effectively reduce the economic losses such as salvaging that shaft bottom causes, well workover that drop due to electric pump unit;

3, device materials, can be at height containing sand, containing H through specially treated ₂s, CO ₂with active Cl ^-etc. continuous operation under the adverse circumstances of chemical substance corrosion, not affected by well temperature, long service life;

4, submersible electric pump preventing from falling into well device two ends link all adopts API Std API SPEC 5B type design, applied widely.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model submersible electric pump preventing from falling into well device.

Fig. 2 clamps the structural representation of righting assembly in submersible electric pump preventing from falling into well device.

The specific embodiment

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

By Fig. 1 in conjunction with shown in Fig. 2: a kind of submersible electric pump preventing from falling into well device, comprise and join oily short circuit 1, top connection 2, clamping righting assembly, central tube 11 and lower contact 12, wherein, the upper and lower port of joining oily short circuit 1 arranges respectively external screw thread, the sidewall of joining oily short circuit arranges opening 101, joins oily short circuit 1 lower thread and connects top connection 2; Described top connection 2, its lower port is threaded with central tube 11, and the lower semisection sidewall of top connection 2 is the conical surface 201; Described clamping righting assembly, comprise some slips 3, garter spring 4, spring 5, slips extension 6, pin 7, orbit ring 8, commutation pin 9 and sheath 10, slips extension 6 is socketed in the outside of central tube 11, some slips 3 are circumferentially uniform along central tube 11, the upper port of slips 3 is made as cone mouth 301, corresponding with the conical surface 201 of top connection, it is interior also further fixing by garter spring 4 that the lower end of slips 3 is embedded in the groove of slips extension 6, fixing spring 5 between slips 3 and slips extension 6; The lower end of slips extension 6 is fixedly connected with sheath 10 by pin 7, the intracavity bottom of sheath 10 is equipped with orbit ring 8, on orbit ring 8, be fixed with commutation pin 9, this commutation pin 9 forms sliding pairs with the vertical chute 1101 of central tube 11, the lower contact 12 that is threaded of the lower end of central tube 11.

Under normal condition, the device design attitude of going into the well, now, Electric Submersible Pump Unit and preventing from falling into well device in free state, can move up and down within the specific limits in sleeve pipe; When connecting component, Electric Submersible Pump Unit or its top surprisingly ruptures, and during free-falling, under the effect of frictional force and device inner spring 5, each parts of preventing from falling into well device link, central tube 11 moves down, and commutation pin 9 is in the interior slip of vertical chute 1101 of central tube 11, and slips spreading mechanism produces to move radially in time and struts under the taper seat effect of top connection 2, slip insert is tightly stuck on internal surface of sleeve pipe, completes and sits card.According to friction self-locking principle, slip insert blocks tighter and tighter, and electric pump unit is held, and the thing that effectively prevents from dropping continues to drop to shaft bottom; During salvaging, be equivalent to slips 3 to carry out unfreezing operation.Hook and on carry the thing that drops, drive on central tube 11 and move, commutation pin 9 skids off from vertical chute 1101, slips 3 is exited in top connection 2, makes slip insert leave sleeve pipe and regain under spring 5 effects, completes unfreezing.

Claims

1. a submersible electric pump preventing from falling into well device, comprise and join oily short circuit, top connection, clamping righting assembly, central tube and lower contact, it is characterized in that: described in join oily short circuit upper and lower port external screw thread is set respectively, the sidewall of joining oily short circuit arranges opening, joins oily short circuit lower thread and connects top connection; Described top connection, its lower port is threaded with central tube, and the lower semisection sidewall of top connection is the conical surface; Described clamping righting assembly, comprise some slips, garter spring, spring, slips extension, pin, orbit ring, commutation pin and sheath, slips hanging sleeve is connected on the outside of central tube, some slips are circumferentially uniform along central tube, the upper port of slips is made as cone mouth, corresponding with the conical surface of top connection, the lower end of slips is embedded in the groove that slips hangs and further by garter spring, fixes, fixing spring between slips and slips extension; The lower end that slips is hung is fixedly connected with sheath by pin, and the intracavity bottom of sheath is equipped with orbit ring, is fixed with commutation pin on orbit ring, the vertical chute composition sliding pair of this commutation pin and central tube, the lower contact that is threaded of the lower end of central tube.