Spherical centering turbulence promoter

FIELD: mining industry.

SUBSTANCE: device has body in form of cylindrical bushing. Outside the body three blades are mounted symmetrically, with 120° spacing, relatively to central axis and being supports for device, providing for centering of drilling column. Blade is made of variable width with increase towards end portion, wherein rolling body in form of rubber ball is pressed.

EFFECT: higher efficiency, higher reliability, higher durability, lower costs.

2 dwg

The invention relates to the drilling technique, namely, devices within the snap drill string, providing centering of the drilling tool relative to the axis of the borehole and turbulence in the flow of washing fluid. Can be used in any layout drill string during the drilling of any well-known manner.

Known stabilizer elastic SU - 268, SU - 241, SU - 212 (K.V. Johansen companion of the drillers. M.: Nedra, 1981. - P.50). The stabilizer includes a housing in the form of a sleeve having mounting threads on the body wearing rubber plate with four edges of the rubber.

A disadvantage of the known stabilizer is a small gap between the squares of the cross-section of the bore and biasing elastic, so when running in the hole and rotate the product rips filtration crust that is a negative process. In addition, the stabilizer is an additional connection, which reduces the reliability of the column before the destruction as a result of critical stresses and complicates the conduct of emergency operations.

Analysis of the existing level of engineering and technology has demonstrated the inadequacy of measures and tools used to maintain reservoir properties (CFP), productive reservoirs during the primary opening. Reduction of FES collectors is due to: blockage of the pore channels prizabojnoe (PZ) collector solids drilling fluid, mud and cement slurry; reducing the sectional area of interporous channels due to swelling clay material cementitious material; the formation of water-oil and melanotaenia emulsions; education in the pores of insoluble sediments and solids; d) sedimentation mehanicheskij impurities, kolloidnyi particles contained in a "clean" fluids; (e) molecular surface and capillary effects.

Currently identified the following areas of improvement of technologies of drilling productive reservoirs: development of formulations of drilling fluids and regulations governing drilling of wells and the development of technical devices are practically absent. Development of formulations of drilling fluids involves the use of hydrophobic drilling fluids with low filtering, the use of solutions containing no or low solids content, the inclusion in the composition of drilling fluids chemical elements, eliminating swelling clay material cementitious material collector, education in the pores of insoluble sediments and solids, the formation of water-oil and melanotaenia emulsions. Regulation of drilling wells is as follows: maintaining the required bottomhole pressure; the establishment of the necessary load for the second, and the frequency of rotation of the rock cutting tool for the effective destruction of rocks; effective removal of sludge and operation of the downhole motor at a certain performance drilling pumps.

Technology conservation FES means maintaining a minimum excess downhole above the reservoir, equal to or less than the reservoir, which requires special ground equipment and complex preparations.

The task, which is aimed at solving the claimed technical solution are: alignment of the drill string relative to the notional Central axis of the bore, thus reducing the negative impact of the half-wave of the drill string during rotary drilling method; maintaining the stability of the drill string; the preservation of the borehole wall from destruction by beating the drillstring; the preservation of the mud cake from destruction by beating the drillstring and taking it during tripping operations (SPO); the qualitative implementation of drilling wells in a given path; minimization process cavernosometry; implementation of quality wash well drilling mud with high plastic properties due to turbulence in the flow.

The technical result is to ensure smooth movement (without scuffing clay coating) of the drilling tool in the well with simultaneous alignment of the drill string in the borehole,the improvement in hydraulic performance wash well.

This technical result is achieved by the fact that the centralizer-turbulator ball, comprising a housing in the form of a cylindrical sleeve with three blades located outside the housing symmetrically through 120° Central axis, a feature is that at the base of each blade has a sharp corner, which gradually fades into the end portion in a wide semi-circular shape, in which volume plated ball, designed to ensure smooth sliding and rolling at the translational and rotational motions of the drill string. Moreover, the blades are at an angle relative to the horizontal plane, which allows turboservice the upward flow of wash liquid.

The causal link between the claimed technical result and essential features of the invention are as follows. At the base of the blade begins an acute angle, then expands and ends in a semicircular form, with sufficient volume, in which shrunk rubber ball. This form allows you to smoothly slide and roll the centralizer, not tearing mud cake with translational and rotational movements of the drill string. When the translational movement of the centralizer-turbulization ball glides along with the drillstring, ensuring its smooth movement, not sdira the t mud cake, prevents the process salecaverta. When the circulation of drilling fluid blades products create turbulence flow, improving hydraulic performance wash well. This device is manufactured, for example, from an elastic material, can be used in sophisticated horizontal wells. Number of blades - three is the optimal number to ensure alignment of the drill string with a minimum hydraulic resistance.

Thus, the centralizer is turbulator ball ensures the safety of the mud cake in the well during tripping operations, gives the centering of the drill column, allows you to turboservice the upward flow of drilling fluid, contributes to the preservation of the FES productive collectors, improves the removal of sludge from the bottom and therefore improves the technical-economic indicators of drilling.

The invention is illustrated by drawings, where figure 1 shows a front view of clamp-turbulizer ball, figure 2 presents a top view.

The centralizer is turbulator ball (CTS) has a housing 1, for example rubber, which is a cylindrical sleeve. The outside of the housing 1 a, at least three blades 2, symmetrically arranged, through 120°relative to the Central axis and which supports CTS, providing centroculturale columns (not shown). The blades 2 are arranged at an angle relative to the horizontal plane, which allows turboservice the upward flow of wash liquid. The blade 2 is made variable according to the width increasing towards the end. At the base of the blade 2 starts at an acute angle, and in the end ends in a wide semi-circular form in which the plated body rolling in the form of, for example, rubber ball 3. This form of blade 2 allows you to smoothly slide and roll CTS, not tearing mud cake with translational and rotational motion of the drill string, and when washing the wells do not form stagnant zones in the annulus and not to erode the walls of the well.

The centralizer is turbulator ball is and the centering element. It can be manufactured, for example, of a high-strength heat-resistant rubber 54-24 (TA-24-1) or fiberglass of the same shape and mounting method on the column.

Centralizers-energizers rubber ball can be set in intervals across the cased portion of the wellbore and to be at the same time, the protectors of locks. Centralizers-energizers ball fiberglass, more resistant to abrasive rocks, it is proposed to install in the open hole.

The centralizer is turbulator ball (CTS) works as follows.

When odace drilling tool at the bottom CTS moves together with the drill pipe relative to the wellbore. The blade 2 with the balls 3 contribute to the rapid polymerization and smooth movement of the boring tool without the bully of the mud cake. When the rotation of the drill string CTS helps smooth tool movement without the bully of the mud cake and preserves the integrity of the borehole walls. Specifies additional turbulization of the flow of the drilling fluid, which is particularly useful when a high plastic viscosity, reduces the hydraulic resistance of the solution increases its load-carrying capacity. As a result, reduced downhole pressure, which improves operation of downhole equipment, increases the penetration and ensures the safety of the FES productive reservoirs. CTS placed on joints and secure with hose clamps-ties.

For industrial or individual manufacturing units-turbulizer ball does not require large expenditures. Standard materials and molds will allow you to create products in repair shops at the drilling companies without special material costs. The method of mounting and installation reduces the likelihood of an accident, associated with the sticking of drill pipe, the bend due to the occurrence of critical stresses in dangerous sections. Overall stabilizing ability of the product allows better to drill wells with high the technical and economic parameters.

The centralizer is turbulator ball, comprising a housing in the form of a cylindrical sleeve with three blades located outside the housing symmetrically through 120° relative to the Central axis, and at the base of each blade has a sharp corner, gradually turning into a wide semi-circular shape, in which volume plated ball for smooth sliding and rolling with translational and rotational motion of the drill string when said blades are angled relative to the horizontal plane.