CN216477221U - Pressure setting joint for cable throwing and fishing electric submersible pump system - Google Patents

Abstract

The utility model relates to a pressure setting joint for cable throwing and fishing electric submersible pump system, which comprises a setting oil pipe, wherein the setting oil pipe comprises a first section, a second section and a third section with the inner diameter decreasing in sequence from top to bottom along the axial direction, and the joint of the first section and the second section and the joint of the second section and the third section are respectively provided with a first step and a second step; the outer loop has been sat on first step, the outer loop seal cover is located in sitting the oil pipe, outer loop inner seal cover is equipped with a awl section of thick bamboo, a awl section of thick bamboo and outer loop pass through pin joint, the external diameter of a awl section of thick bamboo is less than the internal diameter of second festival, the external diameter of a awl section of thick bamboo is greater than the internal diameter of third festival, the upper end of a awl section of thick bamboo has ascending uncovered, uncovered blocking through the shutoff body, the lower extreme of a awl section of thick bamboo is located second step top, the lateral wall of a awl section of thick bamboo is equipped with first grade road mouth, first grade road mouth and pin all are located the sealing department below. The one-way setting from top to bottom can be realized; and the liquid in the oil pipe can be discharged, so that the submersible pump unit can be smoothly lifted up through the bearing cable.

Description

Pressure setting joint for cable throwing and fishing electric submersible pump system

Technical Field

The utility model relates to a cable is thrown and is dragged for the seat of electric submersible pump system and seal the technique, especially a pressure seat that is used for cable to throw and drag for electric submersible pump system seals the joint.

Background

At present, the electric cable throwing and fishing pump system with the publication number of CN113090209A does not need to throw and fish the electric submersible pump unit through an oil pipe like the traditional electric cable throwing and fishing pump unit, but throws and fishes the electric submersible pump unit through a new bearing cable, so that the operation is convenient and fast, and the operation risk is lower.

The electric pump system for throwing and fishing the cable has a pressure setting process, the pressure setting needs to be carried out by setting an oil pipe, the existing setting oil pipe is in a circular pipe shape, the upper end of the existing setting oil pipe is in threaded connection with a central pipe of a pressing type setting shaft bottom suspension penetrating structure with the bulletin number of CN214660033U, the lower end of the existing setting oil pipe is connected with an electric submersible pump unit, setting is realized in the setting oil pipe through a setting structure, and the setting structure is a plugging disc for plugging the setting oil pipe. After the pressure setting is finished, hydraulic pressure testing needs to be carried out on the oil pipe, the structure of the electric submersible pump system can be influenced in the oil pipe pressure testing process, and if the conditions that the insulation of the bearing cable is unqualified and the like occur, the electric pump unit needs to be checked. Because the hydraulic pressure test leads to being full of liquid in the oil pipe, oil pipe internal pressure is too big for it is difficult to lift electric pump unit to bear the cable, and then can't influence the safety in utilization of whole electric submersible pump system to the inspection of electric pump unit.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: after sealing by the existing setting oil pipe to the prior art, the pressure in the oil pipe is too large in the oil pipe pressure test process, the electric pump unit is difficult to lift by a bearing cable to check the bearing cable, the problem of the use safety of the whole electric submersible pump system is influenced, the pressure setting joint for the cable throwing and fishing electric submersible pump system is provided, the pressure setting process can be realized, when the electric pump unit is lifted by the bearing cable to check the electric pump unit, the liquid in the oil pipe can be discharged, the electric submersible pump unit can be smoothly lifted by the bearing cable, and the use safety of the whole electric submersible pump system is avoided being influenced.

In order to realize the purpose, the utility model discloses a technical scheme be:

a pressure setting joint for a cable throwing and fishing electric submersible pump system comprises a setting oil pipe, wherein the setting oil pipe comprises a first section, a second section and a third section from top to bottom along the axial direction, the inner diameters of the first section, the second section and the third section are sequentially reduced, a first step is arranged at the joint of the first section and the second section, and a second step is arranged at the joint of the second section and the third section;

the outer loop has been set to on the first step, the outer loop seal cover is located in the setting oil pipe, the outer loop seal cover is equipped with a awl section of thick bamboo, a awl section of thick bamboo with the outer loop passes through pin joint, the external diameter of a awl section of thick bamboo is less than the internal diameter of second festival, the external diameter of a awl section of thick bamboo is greater than the internal diameter of third festival, the upper end of a awl section of thick bamboo has ascending uncovered, uncovered blocking through the blocking body, the lower extreme of a awl section of thick bamboo is located second step top, the lateral wall of a awl section of thick bamboo is equipped with first grade road junction, first grade road junction the pin all is located the outer loop with seal department below between the setting oil pipe, first grade road junction the pin all is located the outer loop with seal department below between the awl section of thick bamboo.

In this scheme, set up oil pipe upper end and be used for connecting the center tube, the lower extreme is used for connecting the electric submersible pump unit, forms the runner of oil. The outer loop, awl section of thick bamboo and pin isotructure all are located inside the setting oil pipe, and the outer loop is used for setting up the pin, realizes the fixed of a awl section of thick bamboo, avoids setting up the pin in setting oil pipe, avoids the pin hole to cause setting up revealing between oil pipe and the outside oil pipe. The inner wall of the up end of a awl section of thick bamboo is uncovered for making progress, uncovered toper or round platform shape like upwards enlargeing for the shutoff body can carry out the shutoff to uncovered, and the shutoff body is one-way setting to uncovered setting, only realizes setting from top to bottom, when needs oil pipe during operation, need not to destroy the setting structures such as a awl section of thick bamboo and the shutoff body, when upwards pumping oil by the electric submersible pump unit, can directly promote the shutoff body and upwards remove, and then realize the intercommunication of the runner of first festival, second festival and third festival. After the pin is sheared off, the outer diameter of the conical cylinder is smaller than the inner diameter of the second section, the outer diameter of the conical cylinder is larger than the inner diameter of the third section, so that the conical cylinder, the plugging body and other setting structures can move downwards and be located on the second step, the conical cylinder and the plugging body cannot directly fall down to the electric submersible pump unit, and a flow channel of the electric submersible pump unit can be prevented from being blocked.

The outer ring outer wall is sleeved with the setting oil pipe inner wall in a sealing manner, the outer ring inner wall is sleeved with the conical cylinder outer wall in a sealing manner, and the sealing position between the outer ring outer wall and the setting oil pipe and the sealing position between the outer ring inner wall and the conical cylinder outer wall are both positioned above the pin and the first flow channel opening. When pressure setting, the plugging body plugs the channel in the conical cylinder, and the first flow channel openings of the channel in the conical cylinder and the side wall of the conical cylinder cannot be communicated with the flow channel above the conical cylinder, so that setting is realized, and pressure test of an oil pipe can be performed. After the oil pipe pressure testing, when discovering that electric submersible pump system architecture goes wrong, when needing to take out electric submersible pump unit and overhauls, through from top to bottom pressure boost, will the awl section of thick bamboo with outer loop lower extreme radial connection's pin is cut off for the awl section of thick bamboo moves down to sitting on the second step, the external diameter of awl section of thick bamboo is less than the internal diameter of second festival, so have the interval between the outer wall of awl section of thick bamboo and the second festival inner wall for first grade of thick bamboo is crossed the clearance between the outer wall of awl section of thick bamboo and the runner intercommunication of second festival inner wall and is followed a section of thick bamboo top, makes and carries out the release to the awl section of thick bamboo top, unloads the liquid in the oil pipe column above the awl section of thick bamboo, and then makes and play electric submersible pump unit through bearing cable, so that overhaul work.

By adopting the pressure setting joint for the cable throwing and fishing electric submersible pump system, unidirectional setting from top to bottom can be realized, and pumping operation of an electric submersible pump unit cannot be influenced; the pressure relief can be carried out on the upper portion of the conical cylinder by shearing and cutting off the pin, liquid in the oil pipe column on the upper portion of the conical cylinder is discharged, and therefore the electric submersible pump unit can be lifted out through the bearing cable, maintenance work can be carried out conveniently, and factors influencing the use safety of the whole electric submersible pump system can be eliminated in advance.

Preferably, a first axial limiting device is arranged above the outer ring, and/or a second axial limiting device is arranged above the plugging body.

The below of outer loop is carried on spacingly through first step, and the top and the below of awl section of thick bamboo carry on spacingly through the pin, and the below of the shutoff body carries on spacingly through a awl section of thick bamboo, and first axial stop device can restrict the outer loop and shift up, and second axial stop device can restrict the shutoff body and shift up and then can avoid outer loop and/or shutoff body along setting oil pipe's axial rebound, prescribes a limit to its setting operation interval, improves the reliability.

Preferably, the first axial limiting device and the second axial limiting device are both baffle rings, retaining rings are arranged above the baffle rings, the baffle rings and the retaining rings are coaxially arranged with the setting oil pipe, the retaining rings are embedded into the inner wall of the setting oil pipe, the baffle rings are arranged between the outer ring and the retaining rings, and the inner diameter of the baffle rings is smaller than that of the plugging body along the radial width of the setting oil pipe.

The retaining ring is embedded into the inner wall of the setting oil pipe to fix the retaining ring and further fix the outer ring downwards, and meanwhile, the inner diameter of the retaining ring is smaller than the radial width of the plugging body along the setting oil pipe, so that the downward limiting of the plugging body can be realized. By adopting the structure, the retainer ring is fixed on the inner wall of the setting oil pipe, so that the retainer ring can limit the plugging body and the outer ring downwards at the same time, the structure is simple, the number of structural parts is small, and the reliability is higher.

Preferably, a second flow passage opening which penetrates through the setting oil pipe in the axial direction is formed in the circumferential direction of the baffle ring, and when the electric submersible pump unit operates, the blocking body or impurities in the well can block the passage in the baffle ring, so that the operation can be continued through the second flow passage opening.

Preferably, the second flow channel opening is a circular arc-shaped strip-shaped hole and is suitable for the baffle ring structure, so that the second flow channel opening with a larger flow channel can be formed on the premise of meeting the strength of the baffle ring.

Preferably, a radial gap is formed between the inner wall of the upper end of the outer ring and the outer wall of the upper end of the cone, and the gap is vertically aligned with the second flow passage opening.

A gap between the inner wall of the upper end of the outer ring and the outer wall of the upper end of the conical cylinder is convenient for the plugging body to plug the conical cylinder; and a flow passage space can be provided for the second flow passage opening, so that the second flow passage opening can be better utilized.

Preferably, the inner wall of the outer ring is provided with a third step, the lower end of the conical cylinder is provided with a fourth step, and the third step is arranged above the fourth step in a matched manner.

The third step through the outer loop can be spacing downwards to the fourth step of awl section of thick bamboo, and further the outer loop is spacing downwards to the awl section of thick bamboo, alleviates the ascending shearing force that the pin received, and the reliability is higher.

Preferably, the pin comprises a first section, a second section and a third section which are in a step shape along the axial direction of the pin, the first section, the second section and the third section are all arranged along the radial direction of the setting oil pipe, the diameter of the first section is larger than that of the second section and the third section, the first section is in threaded connection with the inner ring, the second section is embedded into the outer wall of the conical cylinder, and the third section penetrates through the inner wall of the conical cylinder and is provided with a cotter pin.

The diameters of the first section, the second section and the third section are gradually reduced to form a ladder shape. When the pin is cut off, the first section is in threaded connection with the outer ring, the second section and the third section are integrated, the left end and the right end of the second section and the left end and the right end of the third section are limited through the cotter pin and the outer wall of the conical cylinder, the first section, the second section and the third section of the pin can be prevented from falling to the electric submersible pump unit, and the pin is prevented from blocking a flow channel of the electric submersible pump unit.

Preferably, the blocking body is a soluble cone, and a thinning area is arranged at the radial middle part of the upper end of the cone; or the plugging body is a soluble sphere. The soluble cone or the soluble ball can be dissolved in the well, so that the subsequent flow channel is enlarged, and the oil production efficiency is improved. The radial middle part of the upper end of the cone is provided with a thinning area, so that materials can be reduced, the strength of the radial middle part of the cone is weakened, and when the pin is required to be sheared and the pin is stuck, the radial middle part of the cone can be damaged, so that liquid above the cone can be discharged.

Preferably, the setting oil pipe with the cover is equipped with first sealing washer between the outer loop, the outer loop with the cover is equipped with the second sealing washer between the awl section of thick bamboo, first sealing washer with the second sealing washer all is located the top of pin.

Through first sealing washer with the second sealing washer, realization outer loop outer wall that can be better is established with the sealed cover of setting oil pipe inner wall, and the outer loop inner wall is established with the sealed cover of awl section of thick bamboo outer wall.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the pressure setting joint for the cable throwing and fishing electric submersible pump system can realize one-way setting from top to bottom, and cannot influence pumping operation of the electric submersible pump unit; the pressure relief can be carried out on the upper portion of the conical cylinder by shearing and cutting off the pin, liquid in the oil pipe column on the upper portion of the conical cylinder is discharged, and therefore the electric submersible pump unit can be lifted out through the bearing cable, maintenance work can be carried out conveniently, and factors influencing the use safety of the whole electric submersible pump system can be eliminated in advance.

2. Through the retaining ring in the fixed of setting oil pipe inner wall for the retaining ring can realize simultaneously that it is spacing downwards to shutoff body and outer loop, its simple structure, and the structure is few, and the reliability is higher.

3. The circumference of the baffle ring is provided with an axially-through arc-shaped strip hole serving as a second flow channel opening, so that the baffle ring is suitable for a baffle ring structure, the second flow channel opening with a larger flow channel can be formed on the premise of meeting the strength of the baffle ring, and when the electric submersible pump unit operates, impurities in a blocking body or a well possibly block the passage in the baffle ring, so that the operation can be continued through the second flow channel opening.

4. When the pin is cut off, the first section is in threaded connection with the outer ring, the second section and the third section are integrated, the left end and the right end of the second section and the left end and the right end of the third section are limited through the cotter pin and the outer wall of the conical cylinder, the first section, the second section and the third section of the pin can be prevented from falling to the electric submersible pump unit, and the pin is prevented from blocking a flow channel of the electric submersible pump unit.

Drawings

FIG. 1 is a sectional view of a setting state of a pressure setting joint for a cable throwing electric submersible pump system in embodiment 1;

FIG. 2 is an enlarged partial schematic view taken at the circle in FIG. 1;

FIG. 3 is a schematic structural view of a cone in example 1;

FIG. 4 is a schematic structural view of an outer ring in embodiment 1;

FIG. 5 is a schematic view showing the structure of a retainer ring in embodiment 1;

FIG. 6 is a cross-sectional view of the embodiment 1 with the pin of the pressure setting joint cut off;

fig. 7 is a partially enlarged schematic view of fig. 6 at the circle.

Icon: 1-setting the oil pipe; 11-first section; 12-second section; 13-third section; 14-a first step; 15-a second step; 2-the outer ring; 21-a third step; 22-a first pin hole; 3-a cone; 31-first flow port; 32-a fourth step; 33-a second pin hole; 4-pins; 41-first section; 42-a second segment; 43-third section; 44-a cotter pin; 5-plugging body; 6-baffle ring; 61-a second flow port; 7-a retainer ring; 81-a first seal ring; 82-second seal ring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

The embodiment provides a pressure setting joint for a cable running and fishing electric submersible pump system, and referring to fig. 1-7, the pressure setting joint comprises a setting oil pipe 1, the setting oil pipe 1 comprises a first section 11, a second section 12 and a third section 13 from top to bottom along an axial direction, the inner diameters of the first section 11, the second section 12 and the third section 13 are sequentially reduced, a first step 14 is arranged at the joint of the first section 11 and the second section 12, and a second step 15 is arranged at the joint of the second section 12 and the third section 13; the first section 11, the second section 12 and the third section 13 are only used for distinguishing descriptions, and in fact, the first section 11, the second section 12 and the third section 13 are integrally formed structures, and the setting oil pipe 1 is a whole component.

The outer ring 2 is set on the first step 14, the outer ring 2 is sealed to overlap and is located in setting oil pipe 1, the outer ring 2 internal seal cover is equipped with a awl section of thick bamboo 3, a awl section of thick bamboo 3 with the outer ring 2 is connected through pin 4, the external diameter of a awl section of thick bamboo 3 is less than the internal diameter of second festival 12, the external diameter of a awl section of thick bamboo 3 is greater than the internal diameter of third festival 13, the upper end of a awl section of thick bamboo 3 has ascending uncovered, the uncovered of a awl section of thick bamboo 3 is through shutoff body 5 shutoff, the lower extreme of a awl section of thick bamboo 3 is located second step 15 top, the lateral wall of a awl section of thick bamboo 3 is equipped with first grade of mouth 31, first grade of mouth 31 pin 4 all is located outer ring 2 with seal below between setting oil pipe 1, first grade of mouth 31 pin 4 all is located outer ring 2 with seal below between a awl section of thick bamboo 3.

In the embodiment, the upper end of the setting oil pipe 1 is used for connecting a central pipe, and the lower end of the setting oil pipe 1 is used for connecting an electric submersible pump unit to form a flow channel of petroleum. As shown in fig. 1, the outer ring 2, the conical cylinder 3, the pin 4 and other structures are all located inside the setting oil pipe 1, the outer ring 2 is used for setting the pin 4, the conical cylinder 3 is fixed, the pin 4 is prevented from being arranged in the setting oil pipe 1, and leakage between the setting oil pipe 1 and the outside oil pipe caused by pin holes is avoided. The inner wall of the up end of a cone section of thick bamboo 3 is uncovered for making progress, uncovered like the toper or the round platform shape that upwards enlarge for shutoff body 5 can carry out the shutoff to uncovered, and shutoff body 5 is one-way setting to uncovered setting, only realize the setting from top to bottom, when needing oil pipe during operation, need not to destroy setting structures such as a cone section of thick bamboo 3 and shutoff body 5, when upwards pumping oil by the electrical submersible pump unit, can directly promote shutoff body 5 and upwards remove, and then realize first festival 11, the intercommunication of the runner of second festival 12 and third festival 13.

In this embodiment, only the opening at the upper end of the cone 3 is in the shape of a circular truncated cone, the opening at the upper end of the circular truncated cone is large, the opening at the lower end of the circular truncated cone is small, and the inner wall below the opening is cylindrical. Of course, on the premise that the structural strength can be satisfied, the whole inner wall of the cone 3 can be in a circular truncated cone shape. The plugging body 5 can be a soluble cone or a soluble sphere which can be dissolved in the well, so that the subsequent flow channel is increased, the oil outlet efficiency is improved, and the cone or the sphere is more easily matched with the inner part of the upper end of the cone barrel 3 for plugging. As shown in fig. 2, the plugging body 5 is a cone, the lower end of the cone is small, the plugging body can extend into the upper end of the cone barrel 3 to plug, and the setting effect is better. And the radial middle part of the upper end of the cone is provided with a thinning area, namely, the radial middle part of the upper end of the cone is hollow, so that the material can be saved. Meanwhile, the strength of the radial middle part of the cone is weakened, and when the pin 4 is required to be sheared and the pin 4 is blocked, the radial middle part of the cone can be damaged, so that the liquid above the cone can be discharged. In this embodiment, the outer wall of the outer ring 2 is sleeved with the inner wall of the setting oil pipe 1 in a sealing manner, the inner wall of the outer ring 2 is sleeved with the outer wall of the conical cylinder 3 in a sealing manner, and the sealing position between the outer wall of the outer ring 2 and the setting oil pipe 1 and the sealing position between the inner wall of the outer ring 2 and the outer wall of the conical cylinder 3 are both located above the pin 4 and the first flow channel opening 31, so that a leakage point is prevented from being formed during setting. Specifically, as shown in fig. 2, a first sealing ring 81 is sleeved between the setting oil pipe 1 and the outer ring 2, a second sealing ring 82 is sleeved between the outer ring 2 and the conical cylinder 3, and the first sealing ring 81 and the second sealing ring 82 are both located above the pin 4 and also above the first flow channel opening 31. Through first sealing washer 81 with second sealing washer 82, realization outer loop 2 outer wall that can be better cup joints with setting oil pipe 1 inner wall is sealed, and outer loop 2 inner wall cup joints with the outer wall of a awl section of thick bamboo 3 is sealed. And the second sealing ring 82 should be arranged at the position below the outer ring 2 as far as possible, after the pin 4 is sheared, the conical cylinder 3 falls along the inner wall of the outer ring 2, the buffering and sealing time of the second sealing ring 82 is longer, and the falling of the conical cylinder 3 is more stable.

As shown in fig. 1-2, when pressure setting is performed, pressure is applied to the oil pipe from the wellhead, the plugging body 5 plugs the channel in the conical cylinder 3, and at the moment, the channel in the conical cylinder 3 and the first flow channel opening 31 on the side wall of the conical cylinder 3 cannot be communicated with the flow channel above the conical cylinder 3, so that setting is realized, and pressure test of the oil pipe can be performed. After the oil pipe is tested, when the structure of the electric submersible pump system is found to be in a problem and the electric submersible pump unit needs to be taken out for maintenance, the well head continues to be pressurized, the conical cylinder 3 and the pin 4 radially connected with the lower end of the outer ring 2 are cut off, and the conical cylinder 3 moves downwards to be seated on the second step 15, as shown in fig. 6-7. Because the outer diameter of the conical cylinder 3 is smaller than the inner diameter of the second section 12, a distance exists between the outer wall of the conical cylinder 3 and the inner wall of the second section 12, so that the first flow passage opening 31 is communicated with a flow passage above the conical cylinder 3 through a gap between the outer wall of the conical cylinder 3 and the inner wall of the second section 12, as shown by a dotted line in fig. 7, the pressure of the upper part of the conical cylinder 3 can be relieved, liquid in an oil pipe column above the conical cylinder 3 can be discharged, and then the electric submersible pump unit can be lifted out through a bearing cable, so that the maintenance work can be carried out. The axial distance between the first step 14 and the second step 15 is suitably larger than the axial length of the blocking body 5 and the whole conical cylinder 3 after the blocking body 5 blocks the conical cylinder 3, so that a flow channel formed through the first flow channel opening 31 after the shearing pin 4 is smoother.

In this embodiment, the first flow channel opening 31 may be a hole, a notch, or the like, and the first flow channel opening 31 is preferably disposed below the sealing position between the outer ring 2 and the setting oil pipe 1 and below the sealing position between the outer ring 2 and the conical cylinder 3, as shown in fig. 3, the first flow channel opening 31 is a notch, and a plurality of notches are uniformly disposed in the circumferential direction of the lower end of the conical cylinder 3, so that the stress is uniform, the processing is facilitated, and the axial length of the conical cylinder 3 can be shortened.

In this embodiment, the lower part of the outer ring 2 is limited by the first step 14, the upper part and the lower part of the conical cylinder 3 are limited by the pin 4, the lower part of the plugging body 5 is limited by the conical cylinder 3, a first axial limiting device may be arranged above the outer ring 2, and/or a second axial limiting device may be arranged above the plugging body 5. First axial stop device can carry on spacingly to outer ring 2 top, and second axial stop device can carry on spacingly to the shutoff body 5 top, and then can avoid outer ring 2 and/or shutoff body 5 along setting up 1 axial rebound of oil pipe, prescribes a limit to its setting operation interval, improves the reliability.

As shown in fig. 1-2, in this embodiment, the first axial limiting device and the second axial limiting device are both stop rings 6, a retainer ring 7 is disposed above the stop rings 6, the stop rings 6 and the retainer ring 7 are both coaxially disposed with the setting oil pipe 1, the retainer ring 7 is embedded in the inner wall of the setting oil pipe 1, the stop rings 6 are disposed between the outer ring 2 and the retainer ring 7, the retainer ring 7 is embedded in the inner wall of the setting oil pipe 1 to fix the stop rings 6, so as to fix the outer ring 2 downward, and meanwhile, the inner diameter of the stop rings 6 is smaller than the radial width of the plugging body 5 along the setting oil pipe 1, so as to achieve downward limiting of the plugging body 5. Through retaining ring 7 in the fixed of setting 1 inner walls of oil pipe for 6 can realize simultaneously that it is spacing to the shutoff body 5 and outer loop 2 is decurrent, its simple structure, the structure is few, and the reliability is higher.

In this embodiment, a second flow port 61 that penetrates in the axial direction of the setting oil pipe 1 is further disposed in the circumferential direction of the retainer ring 6, and the shape, the arrangement position, and the number of the second flow port 61 may be various, but the strength of the retainer ring 6 should be ensured. When the electric submersible pump unit operates, the blocking body 5 or impurities in the well can block the channel in the baffle ring 6, and the operation can be continued through the second flow passage opening 61. As shown in fig. 5, a total of 4 second flow openings 61 are provided, and the 4 second flow openings 61 are all arc-shaped strip-shaped holes, and the arc-shaped strip-shaped holes are adapted to the structure of the baffle ring 6, so that the second flow openings 61 with larger flow passages can be provided on the premise of meeting the strength of the baffle ring 6. Or, a plurality of limit bosses which are circumferentially distributed are arranged on the inner side of the baffle ring 6, the limit bosses limit the plugging body 5 downwards, the second flow channel opening 61 is formed by a gap or a notch between adjacent bosses, the gap or the notch can be integrated with an inner hole of the baffle ring 6, and the mode of arranging the second flow channel opening 61 is not shown in the drawing. Besides, a radial gap is also arranged between the inner wall of the upper end of the outer ring 2 and the outer wall of the upper end of the conical cylinder 3, and the gap is axially aligned with the second flow passage 61 along the setting oil pipe 1, so that the conical cylinder 3 can be conveniently plugged by a plugging body 5; and a flow passage space can be provided for the second flow passage opening 61, so that the second flow passage opening 61 can be better utilized.

As shown in fig. 3, 4, 6-7, a downward third step 21 is provided on the inner wall of the outer ring 2, an upward fourth step 32 is provided at the lower end of the cone 3, and the third step 21 is adapted to be seated above the fourth step 32. The third step 21 through outer loop 2 can be spacing downwards fourth step 32 of a awl section of thick bamboo 3, and further through outer loop 2 is spacing downwards to a awl section of thick bamboo 3, alleviates the ascending shearing force that pin 4 receives, and the reliability is higher. And the lower extreme of awl section of thick bamboo 3 is equipped with a plurality of second pin holes 33, the lower extreme of outer ring 2 is equipped with the first pin hole 22 with second pin hole 33 one-to-one.

As shown in fig. 2, the pin 4 includes a first section 41, a second section 42, and a third section 43 which are stepped along the axial direction thereof, the first section 41, the second section 42, and the third section 43 are all arranged along the radial direction of the setting oil pipe 1, and the diameter of the first section 41 is larger than the diameter of the second section 42 and the third section 43, that is, the diameters of the first section 41, the second section 42, and the third section 43 are gradually reduced to form a step shape. The first section 41 is in threaded connection with the corresponding first pin hole 22 in the outer ring 2, the second section 42 is embedded in the corresponding second pin hole 33 in the outer wall of the cone cylinder 3, and the third section 43 passes through the corresponding second pin hole 33 in the inner wall of the cone cylinder 3 and is provided with a cotter pin 44. When the pin 4 is sheared off, the first section 41 is screwed into the outer ring 2, as shown in fig. 6. The second section 42 and the third section 43 are integrated, the left end and the right end of the second section 42 and the third section 43 are limited through the cotter pin 44 and the outer wall of the conical cylinder 3, as shown in fig. 7, the first section 41, the second section 42 and the third section 43 of the pin 4 can be prevented from falling to the electric submersible pump unit, and the pin 4 is prevented from blocking a flow channel of the electric submersible pump unit.

The pressure setting joint for the cable throwing and fishing electric submersible pump system can realize unidirectional setting from top to bottom, and does not influence pumping operation of an electric submersible pump unit; the pressure relief can be carried out on the upper portion of the conical cylinder 3 by shearing the cutting pin 4, liquid in an oil pipe column on the upper portion of the conical cylinder 3 is discharged, and then the electric submersible pump unit can be lifted out through the bearing cable so as to carry out maintenance work, and further, factors influencing the use safety of the whole electric submersible pump system can be removed in advance.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A pressure setting joint for a cable throwing and fishing electric submersible pump system comprises a setting oil pipe (1), and is characterized in that the setting oil pipe (1) comprises a first section (11), a second section (12) and a third section (13) from top to bottom along the axial direction, the inner diameters of the first section (11), the second section (12) and the third section (13) are sequentially reduced, a first step (14) is arranged at the joint of the first section (11) and the second section (12), and a second step (15) is arranged at the joint of the second section (12) and the third section (13);

an outer ring (2) is placed on the first step (14), the outer ring (2) is sleeved in the setting oil pipe (1) in a sealing manner, a conical cylinder (3) is arranged in the outer ring (2) in a sealing manner, the conical cylinder (3) is connected with the outer ring (2) through a pin (4), the outer diameter of the conical cylinder (3) is smaller than the inner diameter of the second section (12), the outer diameter of the conical cylinder (3) is larger than the inner diameter of the third section (13), an upward opening is formed in the upper end of the conical cylinder (3), the opening is blocked through a blocking body (5), the lower end of the conical cylinder (3) is located above the second step (15), a first flow passage opening (31) is formed in the side wall of the conical cylinder (3), the first flow passage opening (31) and the pin (4) are both located below a sealing position between the outer ring (2) and the setting oil pipe (1), the first flow channel opening (31) and the pin (4) are located below a sealing position between the outer ring (2) and the cone barrel (3).

2. Pressure setting joint for a cable running and fishing submersible pump system according to claim 1, characterized in that a first axial stop means is provided above the outer ring (2) and/or a second axial stop means is provided above the blocking body (5).

3. The pressure setting joint for the cable running and fishing electric submersible pump system according to claim 2, wherein the first axial limiting device and the second axial limiting device are both baffle rings (6), a retainer ring (7) is arranged above the baffle rings (6), the baffle rings (6) and the retainer ring (7) are both arranged coaxially with the setting oil pipe (1), the retainer ring (7) is embedded into the inner wall of the setting oil pipe (1), the baffle rings (6) are arranged between the outer ring (2) and the retainer ring (7), and the inner diameter of the baffle rings (6) is smaller than the radial width of the plugging body (5) along the setting oil pipe (1).

4. The pressure setting joint for the electric cable fishing submersible pump system according to claim 3, characterized in that the baffle ring (6) is provided with a second flow passage opening (61) which axially penetrates along the setting oil pipe (1) in the circumferential direction.

5. The pressure setting joint for the cable running and fishing electric submersible pump system according to claim 4, wherein the second flow passage opening (61) is a circular arc-shaped strip-shaped hole.

6. The pressure setting joint for a cable running electric submersible pump system according to claim 4, characterized in that a radial gap is provided between the inner wall of the upper end of the outer ring (2) and the outer wall of the upper end of the cone (3), and the gap is axially aligned with the second flow passage port (61) along the setting oil pipe (1).

7. The pressure setting joint for the cable throwing and fishing electric submersible pump system according to any one of claims 1 to 6, characterized in that the inner wall of the outer ring (2) is provided with a third step (21), the lower end of the conical barrel (3) is provided with a fourth step (32), and the third step (21) is adapted to be seated above the fourth step (32).

8. The pressure setting joint for the electric submersible pumping system for running and fishing cables according to any one of claims 1 to 6, characterized in that the pin (4) comprises a first section (41), a second section (42) and a third section (43) which are stepped along the axial direction of the pin, the first section (41), the second section (42) and the third section (43) are all arranged along the radial direction of the setting oil pipe (1), the diameter of the first section (41) is larger than the diameters of the second section (42) and the third section (43), the first section (41) is in threaded connection with the inner ring (2), the second section (42) is embedded into the outer wall of the conical cylinder (3), and the third section (43) penetrates through the inner wall of the conical cylinder (3) and is provided with a split pin (44).

9. The pressure setting joint for the cable throwing and fishing electric submersible pump system according to any one of claims 1 to 6, wherein the plugging body (5) is a soluble cone, and a radial middle part of the upper end of the cone is provided with a thinning area; or the plugging body (5) is a soluble sphere.

10. The pressure setting joint for the cable running and fishing electric submersible pump system according to any one of claims 1-6, characterized in that a first sealing ring (81) is sleeved between the setting oil pipe (1) and the outer ring (2), a second sealing ring (82) is sleeved between the outer ring (2) and the conical cylinder (3), and the first sealing ring (81) and the second sealing ring (82) are both located above the pin (4).

Images