CN209892184U

CN209892184U - Sand control load indicator

Info

Publication number: CN209892184U
Application number: CN201920108982.4U
Authority: CN
Inventors: 华杰; 赵立强; 张雪立; 冯柯来; 徐洁; 熊万里
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2020-01-03
Anticipated expiration: 2029-01-23

Abstract

The utility model discloses a sand control load indicator, including main part, upper cover, urceolus, stop device, resilient means, slips, lower cover, inner tube. The main body is tubular, and a plurality of grooves are uniformly formed in the outer part of the main body; the slips are uniformly distributed around the main body; a sand prevention hole penetrating through the pipe wall is formed in the pipe wall between the main body and the slip; the elastic device is arranged in a groove outside the main body, and can be a pressure spring piece or a spring; and a through sand prevention hole is formed in the mounting groove. The utility model discloses an install in tubular column in the pit, slips convex surface upper end is pushed reducing department, and at this moment, slip convex surface upper end under the sleeve pipe terminal surface contact produces certain resistance, and at this moment, the load display instrument through ground realizes fixing a position, and the gravel in the tubular column passes sand control hole to realize load indicator's sand control.

Description

Sand control load indicator

Technical Field

The utility model belongs to the technical field of oil equipment in the pit, concretely relates to sand control load indicator.

Background

The load indicator can accurately position the depth of the underground pipe column in the well through the load indicating instrument on the ground through the interaction between the positioning clamping position and the casing collar. The load indicator has the advantages that the inner diameter is full drift diameter, the through flow is large, the hydraulic erosion is small, the load indicator can be detected and positioned at any position in the well, and the hydraulic pulse is collected without positive circulation, so that the load indicator is widely applied to the underground operation process of oil-gas field development.

However, in the actual use process, due to the sand produced from the stratum, the sand jam of the load indicator is often caused, so that the tool cannot be pulled out and the load indicating error is caused, the positioning accuracy is affected, and huge economic loss is caused to the oil field production, so that the load indicator capable of realizing the sand prevention function is urgently needed at present.

Disclosure of Invention

In order to solve the technical problem that sand card can take place for load indicator among the prior art, the utility model provides a sand control type load indicator, technical scheme is as follows:

a sand control load indicator comprises a main body, an upper cover, an outer barrel, a limiting device, an elastic device, slips, a lower cover and an inner barrel, wherein the main body is tubular, a plurality of grooves are uniformly formed in the outer part of the main body, the slips are uniformly distributed around the main body, and sand control holes penetrating through the pipe wall are formed in the pipe wall between the main body and the slips;

the sand control load indicator further comprises the resilient means mounted within the recess external to the body;

alternatively, the elastic means may be a pressure spring or a spring;

optionally, a through sand prevention hole is arranged in the installation groove;

optionally, a diversion trench connected with the sand-proof hole is arranged on the pipe wall of the main body;

optionally, the limiting device is a screw or a pin, and the slip is fixed in the mounting groove of the main body by the limiting device;

in summary, the invention has the following advantages:

1. the utility model is installed in the underground pipe column, the upper end of the slip convex surface is pushed into the reducing part, the lower end surface of the sleeve on the slip convex surface contacts with the lower end surface of the sleeve to generate a certain resistance, and the positioning is realized through the load display instrument on the ground, so the structure is simple;

2. in use, gravel in the pipe string passes through the sand control hole, thereby realizing sand control of the load indicator.

Drawings

FIG. 1 is a schematic structural view of a sand control type sand control load indicator;

FIG. 2 is a slip configuration schematic of a sand control load indicator;

FIG. 3 is a schematic representation of the operation of the sand control load indicator within the wellbore;

FIG. 4 is a diagram of the acceptance state of the ground load indicating instrument when the sand control load indicator works

Wherein, 1, a main body; 2. an outer cylinder; 3. an upper cover; 4. a limiting device; 5. an elastic device; 6. slips; 7. a lower cover; 8. an inner barrel; 9. a sleeve; 10. a casing collar.

Detailed Description

The invention provides a sand control load indicator which comprises a main body, an upper cover, an outer barrel, a limiting device, an elastic device, a slip, a lower cover and an inner barrel. The main body is tubular, and a plurality of grooves are uniformly formed in the outer part of the main body; the slips are uniformly distributed around the main body; a sand prevention hole penetrating through the pipe wall is formed in the pipe wall between the main body and the slip; the elastic device is arranged in a groove outside the main body, and can be a pressure spring piece or a spring; and a through sand prevention hole is formed in the mounting groove.

Fig. 1 is a schematic structural view of a sand control type sand control load indicator. The outer cylinder of the main body of the sand control load indicator is uniformly provided with a plurality of grooves for installing a locator slip and a compression device. Threads are designed at two ends of the outer cylinder of the positioner and used for installing the upper cover and the lower cover of the positioner. When the device is used, the outer cylinder, the slips, the compression device and the upper and lower covers are firstly inserted from the upper end of the inner cylinder, and then the coupling is installed. Wherein, the pipe wall between the main body and the slips is provided with a sand prevention hole which runs through the pipe wall, thereby realizing the function of preventing sand from being blocked.

Slip construction of sand control load indicator the slip construction is shown in figure 2, where the sand control load indicator slips are the most critical components of the overall positioner. The upper part of the locator slip is designed with a convex surface, and in order that the locator cannot generate large resistance in a well entering state, the angle between the front end inclined plane of the convex surface and the upper plane is larger than the included angle between the rear end inclined plane of the convex surface. The slips adopt chamfer design schemes with different angles from top to bottom, so that the slips can stably pass through a casing coupling when going down a well, a slip block of the sand control load indicator can enter a casing coupling gap when lifting, if the slip block is pulled out of the coupling, the direction of frictional resistance is changed due to the angle of the block on the slip block, the friction force which is more than dozens of times of the pulling force is increased by a continuous oil pipe, so that the slip compression device can contract and deform, the slips are separated from the casing coupling, and the coupling is positioned through a recording curve of the axial stress change of the load indicating instrument.

The working state of the sand control load indicator in the shaft is shown in figure 3, and slips in the shaft are elastically under the shrinking state under the action of the reaction force of the inner wall of the shaft. In order that the sand control load indicator does not generate large resistance with the casing coupling when entering the well, the inclined plane with a small included angle with the convex surface faces downwards. When the pipe column is lifted up to carry out depth correction operation, when the slip of the sand control load indicator is lifted up to the reducing part of the casing coupling, the upper end of the convex surface of the slip is pushed into the reducing part under the action of the compression spring piece, the lower end surface of the casing at the upper end of the convex surface of the slip is contacted with the lower end surface of the casing at the moment, certain resistance is generated, the change of the suspended load of the slip of the sand control load indicator when the slip passes through the casing coupling is accurately judged through the display dial plate, and the actual position of the coupling positioner in the well can be accurately judged.

While the present invention has been described in detail and with reference to the accompanying drawings, it is not to be considered as limited to the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. The utility model provides a sand control load indicator, includes main part, upper cover, urceolus, stop device, resilient means, slips, lower cover, inner tube, wherein the main part is the tubulose, characterized by the main part outside evenly is provided with a plurality of recess, slips evenly distributed is in around the main part, slips upper portion design has the convex surface, and the angle between convex surface front end inclined plane and the last plane is greater than the contained angle on convex surface rear end inclined plane, the main part with be provided with the sand control hole that runs through the pipe wall on the pipe wall between the slips, resilient means install in the main part is outside in the recess, the recess is provided with the sand control hole that runs through the pipe wall.

2. The sand control load indicator of claim 1, wherein the resilient means is a compression spring or a spring.

3. The sand control load indicator of claim 1, wherein the wall of the main body tube is provided with a diversion trench connected with the sand control hole.

4. The sand control load indicator of claim 1, wherein the retention device is a screw or pin, the retention device securing the slips within the groove of the body.