CN115992646A - Rotary sliding orientation tool - Google Patents

Abstract

The present invention provides a rotary slide orientation tool comprising: an orientation housing; the upper end of the mandrel is connected with the drill rod, and the lower end of the mandrel is connected with the drill bit; a measurement system mounted on the directional housing and positioned proximate the drill bit; and a directional housing rotation control system comprising a cardan shaft; the drill rod drives the drill bit to drill in a rotary mode through the mandrel, near-bit measurement is carried out through the measurement system, in a first state, the drill pressure is regulated to be larger than a preset value through the directional shell rotation control system, the mandrel is bent to lean against the inner wall of the directional shell and generate friction force, the directional shell can be driven to rotate through the friction force, and therefore composite drilling is carried out, or a tool face is regulated in a rotary mode, in a second state, the drill pressure is regulated to be smaller than the preset value through the directional shell rotation control system, the directional shell is separated from the mandrel, the tool face is kept unchanged under the action of friction force of a well wall, and therefore the directional shell can drill in a directional mode when the drill string rotates.

Description

Rotary sliding orientation tool

Technical Field

The invention belongs to the technical field of oil and gas exploitation, and particularly relates to a rotary sliding orientation tool.

Background

In the prior art, a directional well and a horizontal well mainly use a screw drilling tool to control the track of a borehole. At present, the screw rod is guided, the drill rod is connected with a bent shell, the mandrel is driven to rotate by hydraulic energy, and when the drill rod is oriented by the screw rod drilling tool, the whole drill string is used for guaranteeing the stability of the tool face of the screw rod drilling tool, so that the drill string and the well wall generate great axial friction, and particularly for a long horizontal section horizontal well and a large displacement well, the great axial friction can cause unsmooth transmission of drilling pressure, and the mechanical drilling speed is low. In order to solve the defect of low drilling speed during sliding directional drilling of the screw drilling tool, various techniques are developed at home and abroad, and the main idea is to rotate a drill stem so as to reduce friction and improve the mechanical drilling speed.

At present, the most advanced is a rotary guiding tool, and the rotary guiding tool can effectively control the track of a well hole and simultaneously rotate a drill string, so that the defects of a sliding guiding technology are overcome, the transmission of drilling pressure is smooth, the mechanical drilling speed is high, and the well hole quality is good. However, since the rotary steerable tool is an electromechanical liquid integrated device, the use and maintenance costs are expensive, which is disadvantageous in terms of reduction of drilling costs.

The Chinese patent document CN108343380A discloses a directional rotary directional drilling tool and a directional rotary directional drilling method for near-horizontal drilling of coal mine underground, wherein a spline enters a key slot after a pump is closed, so that a mandrel is combined with a bent shell, and the tool face can be adjusted; after the pump is started, the spline is separated from the key groove, the bent shell is in a static state under the friction action of the well wall, and the drill rod drives the mandrel and the drill bit to rotate, so that the rotary orientation is performed. The main defects are that directional drilling can only be carried out during drilling, compound drilling with a bent shell rotating can not be carried out, and a measuring probe tube is connected with a mandrel system and a tool face of the bent shell can not be measured underground. When in actual drilling, the bending shell is static to perform directional drilling, and the bending shell is rotating to perform compound drilling, the bending shell and the compound drilling are alternately performed, and the proportion of the two drilling states is adjusted according to the actual wellbore track, so that accurate wellbore track control can be realized.

The Chinese patent document ZL201620363357.0 discloses a downhole tubular column rotation control switch which is arranged at a position about 300m above a screw drilling tool, and can overcome the reactive torque of the screw drilling tool by using the friction force of the drill string about 300m when the drill string rotates through opening the switch by drilling fluid, thereby realizing the aim of rotating the drill string during directional drilling. The main defect is that the friction force generated by utilizing the gravity of the drill string is greatly influenced by the motion state, the situation that a screw drilling tool cannot be stabilized possibly occurs, the drill string with the diameter of about 300m cannot rotate, the rotating proportion of the drill string is reduced, and the friction-reducing and speed-increasing effects are influenced.

The Chinese patent document CN201220454297 discloses an up-to-down sliding drilling antifriction torque-reducing tool, which adopts a control mode of up-to-down releasing, severe axial vibration exists in the actual drilling process, the problem of difficult control can occur, the design of a transmission part is basically not involved, and rapid abrasion occurs for a short joint bearing about 100KN axial force, so the practicability is poor.

Disclosure of Invention

Aiming at the technical problems, the invention aims to provide a rotary sliding orientation tool, which is connected with a drill rod through a mandrel, so that a top drive can directly drive a drill bit to drill through the drill rod and the mandrel, and a bent shell can control the rotary gesture through the weight on bit, so that the mechanical drilling speed can be obviously improved while the track control capability of a borehole is enhanced. In addition, the rotary slide orientation tool is also capable of near bit testing through a measurement system.

To this end, according to the invention there is provided a rotary slide orientation tool comprising: an orientation housing; the mandrel is concentrically arranged in the directional shell, the upper end of the mandrel is connected with the drill rod, and the lower end of the mandrel is connected with the drill bit; a measurement system mounted on the directional housing at a location proximate the drill bit; and a directional housing rotation control system comprising a cardan shaft; the drill rod drives the drill bit to drill in a rotating mode through the mandrel, near-bit measurement is carried out through the measurement system, in a first state, the drill weight is adjusted to be larger than a preset value through the directional shell rotation control system, the mandrel is bent to lean against the inner wall of the directional shell and generate friction force, the directional shell is driven to rotate through the friction force, composite drilling is carried out, or a tool face is adjusted in a rotating mode, in a second state, the drill weight is adjusted to be smaller than the preset value through the directional shell rotation control system, the directional shell is separated from the mandrel, and the tool face is kept unchanged under the action of friction force of a well wall, so that the directional shell can drill in a directional mode when the drill string rotates.

In one embodiment, the mandrel comprises a hollow rod, a water outlet joint, a non-magnetic solid rod and a water inlet joint which are sequentially connected from top to bottom, wherein the universal shaft is connected between the non-magnetic solid rod and the water inlet joint, and the universal shaft is connected with the non-magnetic solid rod through the universal joint.

In one embodiment, a friction material layer is provided on the outer surface of the universal joint, and the mandrel can be abutted against the inner wall surface of the directional casing through the universal joint and generate friction force through the friction material layer.

In one embodiment, a lower joint is fixedly connected to the lower end of the water inlet joint, the lower joint is used for being connected with a drill bit, and a thrust bearing assembly is arranged between the lower joint and the directional shell.

In one embodiment, the water outlet joint is provided with a first overflow hole, the water inlet joint is provided with a second overflow hole, the inner flow passage of the hollow rod, the first overflow hole, the radial annular space between the directional shell and the mandrel, the second overflow hole and the inner flow passage of the lower joint are sequentially communicated to form an overflow passage, and drilling fluid can flow to the drill bit through the overflow passage.

In one embodiment, the orientation housing includes a measurement system housing and a thrust bearing housing coupled to a lower end of the measurement system housing.

In one embodiment, the measurement system housing is configured to include a length of curved housing at an end proximate the drill bit.

In one embodiment, a spacer is provided on the outer surface of the thrust bearing housing, the curved housing and the spacer being capable of coacting to orient the orientation housing.

In one embodiment, the axial spacing between the pad and the lower joint is in the range of 1-1.5m.

In one embodiment, an instrument bin is arranged on the shell of the measuring system, the measuring system comprises a battery, an orientation sensor, a gamma sensor and a wireless transmitting coil, the battery, the orientation sensor, the gamma sensor and the wireless transmitting coil are arranged in the instrument bin, the instrument bin is sealed through a sealing cover plate, and the orientation sensor and the gamma sensor can measure stratum measuring parameters and transmit data through the wireless transmitting coil.

In one embodiment, the inner wall of the lower end of the thrust bearing housing is fixedly connected with a hard alloy outer sleeve, the outer wall of the lower joint is fixedly connected with a hard alloy inner sleeve, and the hard alloy inner sleeve is positioned on the inner side of the hard alloy outer sleeve and forms a gap between the hard alloy inner sleeve and the hard alloy outer sleeve, so that the thrust bearing housing is formed into a radial bearing.

In one embodiment, the upper end of the mandrel is connected with a drill rod through an upper joint, a sealing cylinder is fixedly connected with the upper end of the measuring system shell, and a rotary seal is formed between the sealing cylinder and the upper joint.

In one embodiment, a cooling and lubrication system is also included.

Compared with the prior art, the application has the advantages that:

the rotary sliding orientation tool is connected with the drill rod through the mandrel, so that the top drive can directly drive the drill bit to drill through the drill rod and the mandrel. The curved shell can obviously improve the mechanical drilling speed while enhancing the control capability of the well track through the weight-on-bit control rotary gesture, and when the deviation occurs between the well track and the design, the rotary sliding orientation tool can realize the effect of directional drilling when the drill string rotates, can greatly reduce friction resistance, improves the mechanical drilling speed, adopts the weight-on-bit control means to be simple and reliable, can replace the current expensive rotary guiding tool, and is very beneficial to reducing the cost. In addition, the rotary sliding orientation tool can also realize near-bit testing through the measuring system so as to measure stratum parameters, thereby effectively ensuring the accuracy of the measured parameters and being very beneficial to drilling operation.

Drawings

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

Fig. 1 shows the structure of a rotary slide orientation tool according to the present invention.

In this application, all of the figures are schematic drawings which are intended to illustrate the principles of the invention and are not to scale.

Detailed Description

The invention is described below with reference to the accompanying drawings.

In this application, the end of the rotary slip orientation tool according to the present invention that is lowered into the wellbore near the wellhead is defined as the upper end or similar term, and the end that is away from the wellhead is defined as the lower end or similar term. The directional terms or qualifiers "upper" and "lower" used in this application are used with reference to fig. 1. They are not intended to limit the absolute position of the parts involved, but may vary according to the specific circumstances.

Fig. 1 shows the structure of a rotary slide orientation tool 100 according to the present invention. As shown in fig. 1, the rotary slide orientation tool 100 includes an orientation housing 1, a spindle 2 concentrically arranged inside the orientation housing 1, a measurement system mounted on the orientation housing 1, and an orientation housing rotation control system. The upper end of the mandrel 2 is connected with a drill rod (not shown), and the lower end is connected with a drill bit. The drill rod is connected with the top drive, and the drill rod is driven through the top drive, so that the drill rod can directly drive the drill bit to drill through the mandrel 2. The measuring system is arranged at a position close to the drill bit, and near-drill bit testing can be achieved through the measuring system. The directional housing rotation control system comprises a cardan shaft 4 by means of which cardan shaft 4 the spindle 2 can be bent under the effect of weight on bit. The directional casing 1 is capable of controlling the rotational attitude by controlling the weight on bit, which can be in a stationary or rotating state under the control of the casing rotation control system.

When compound drilling is needed, the drilling pressure is regulated to be larger than a preset value through the directional shell rotation control system, so that the mandrel 2 bends to lean against the inner wall of the directional shell 1 and generate friction force, the directional shell 1 can be driven to rotate through the friction force, the top drive is started to rotate, and the drill string, the mandrel 2, the drill bit and the directional shell 1 synchronously rotate, so that compound drilling is performed, or a tool face is regulated to rotate slowly. At this time, the rotary slide orientation tool 100 is in the first state.

When directional drilling is required, the directional casing rotation control system is used for adjusting the bit pressure to be smaller than a preset value, so that the directional casing 1 is separated from the mandrel 2, and the directional casing 1 keeps the tool surface unchanged under the action of the friction force of the well wall, thereby carrying out directional drilling. At this time, the rotary slide orientation tool 100 is in the second state.

According to the invention, as shown in fig. 1, the mandrel 2 comprises a hollow rod 21, a water outlet joint 22, a non-magnetic solid rod 23, and a water inlet joint 24, which are connected in sequence from top to bottom. The hollow rod 21, the water outlet joint 22, the non-magnetic solid rod 23 and the water inlet joint 24 are connected through screw thread connecting buckles. The non-magnetic solid rod 23 is made of non-magnetic materials, and the hollow rod 21, the water outlet joint 22 and the water inlet joint 24 are made of 4330V high-strength alloy steel.

The upper end of the mandrel 2 is connected to the drill rod by means of an upper joint 9. The upper end of the upper joint 9 is provided with a drill rod buckle, the outer diameter of the upper joint is the same as that of the drill bit joint, the upper joint is used for connecting an upper drill rod, and the lower end of the upper joint 9 is configured into a trapezoid buckle and used for connecting a hollow rod 21 in the mandrel 2. The upper joint 9 is connected with the top drive through a drill rod. Thereby, the drill rod can be driven by the top drive, so that the drill rod can directly drive the drill bit to drill by the mandrel 2.

The universal shaft 4 is connected between the nonmagnetic solid rod 23 and the water inlet joint 24, and the universal shaft 4 is connected with the lower end of the nonmagnetic solid rod 23 through the universal joint 41. The upper end of the universal joint 41 is fixedly connected with the lower end of the nonmagnetic solid rod 23, and the lower end of the universal joint 41 is in universal connection with the water inlet joint 24. The universal joint 41 allows the spindle 2 to be connected at an angle so that the spindle 2 can accommodate an external curved housing (see below) configuration.

According to the present invention, a friction material layer (not shown) is provided on the outer surface of the universal joint 41, and the friction material layer is formed of a high friction coefficient material. The spindle 2 can be brought into contact with the inner wall surface of the orientation casing 1 by means of the universal joint 41 and friction force can be generated by the friction material layer. Thereby, the mandrel 2 drives the directional shell 1 to rotate through friction force to enter the compound drilling.

As shown in fig. 1, a lower joint 5 is fixedly connected to the lower end of the water inlet joint 24 of the mandrel 2, and the lower joint 5 is used for connecting a drill bit. Thereby, the drill bit is connected to the lower end of the spindle 2 via the lower joint 5. In one embodiment, the lower sub 5 is configured to include a cylindrical body, and the lower end of the cylindrical body is configured as a tapered connector for connection with a drill bit. The upper end of the cylindrical body is formed with a tubular connection portion which is inserted into the directional casing 1 and extends upwards to form a connection with the water inlet joint 24 of the mandrel 2. The outer diameter of the tubular connecting portion is smaller than the outer diameter of the cylindrical body, so that an end-face-up step is formed on the outer surface of the outer joint 5.

According to the present invention, the water outlet joint 22 is constructed in a cylindrical structure, and both ends of the water outlet joint 22 are respectively constructed in a trapezoidal buckle for respectively connecting the hollow rod 21 and the non-magnetic solid rod 23. The sidewall of the water outlet joint 22 is provided with a first overflow hole 221 penetrating through the sidewall, and the first overflow hole 221 is arranged at a position near the axial middle part of the water outlet joint 22. The first flow holes 221 are provided in plurality and uniformly distributed in the circumferential direction, and may be provided in 4 to 6, for example. The orifice diameter of the first overflow hole 221 is set to 1/4 of the outer diameter of the water outlet joint 22.

The water inlet joint 24 and the water outlet joint 22 are similar in structure, the water inlet joint 24 is also constructed into a cylindrical structure, and both ends of the water inlet joint are respectively constructed into trapezoidal buckles for respectively connecting the universal shaft 4 and the lower joint 5. The sidewall of the water inlet joint 24 is provided with a second overflow hole 241 penetrating through the sidewall, and the second overflow hole 241 is arranged at a position near the axial middle of the water inlet joint 24. The second flow holes 241 are provided in plurality and uniformly distributed in the circumferential direction, and may be provided in 4 to 6, for example. The orifice diameter of the second flow-through orifice 241 is set to 1/4 of the outer diameter of the water inlet joint 24.

The directional casing 1 is sleeved on the outer side of the mandrel 2, and a radial annulus is formed between the directional casing 1 and the mandrel 2. The internal flow passage of the hollow stem 21, the first flow passage 221 of the water outlet connector 22, the radial annulus between the directional casing 1 and the mandrel 2, the second flow passage 241 of the water inlet connector 24, and the internal flow passage of the lower connector 5 are sequentially communicated, thereby forming a flow passage. Drilling fluid enters the internal flow passage of the hollow rod 21 from the upper joint 9, passes through the flow passage and finally flows through the drill bit.

As shown in fig. 1, a thrust bearing assembly 2 is provided between the lower joint 5 and the directional casing 1. The thrust bearing assembly 2 includes 6-10 sets of thrust bearings. The directional shell 1 is fixed with the outer ring of the thrust bearing group, the mandrel 2 is fixed with the inner ring of the thrust bearing group, so that the directional shell 1 is fixed on the mandrel 2, the mandrel 2 can rotate relative to the directional shell 1 during directional drilling, and meanwhile, the rotation resistance is small, and the control is easy.

According to the present invention, the orientation housing 1 comprises a measurement system housing 11 and a thrust bearing housing 12 connected to the lower end of the measurement system housing 11. The spindle 2 is correspondingly located in the measuring system housing 11 and the thrust bearing assembly 2 is correspondingly located in the thrust bearing housing 12. The outer diameter of the directional casing 1 is 40-50mm smaller than the borehole diameter. In one embodiment, the measurement system housing 11 and the thrust bearing housing 12 may be connected by a tapered clasp.

In one embodiment, the inner wall of the lower end of the thrust bearing housing 12 is fixedly connected to the cemented carbide outer sleeve 7, preferably, the cemented carbide outer sleeve 7 is fixedly connected to the inner wall of the lower end of the thrust bearing housing 12 by threads. Meanwhile, a hard alloy inner sleeve 8 is fixedly connected to the outer wall of the tubular connecting part of the lower joint 5. The cemented carbide inner sleeve 8 is located inside the cemented carbide outer sleeve 7 with a gap, preferably 0.3mm, formed between the cemented carbide inner sleeve 8 and the cemented carbide outer sleeve 7, whereby the cemented carbide inner sleeve 8 and the cemented carbide outer sleeve 7 form a radial bearing structure excellent in wear resistance.

In the present embodiment, an inner limit step with an upward end face is provided on the inner wall of the thrust bearing housing 12, and an outer limit step with an upward end face is provided on the outer wall of the tubular connection portion of the lower joint 5. The upper end face of the outer ring of the thrust bearing group in the thrust bearing assembly 2 is abutted against the inner limit step, and the lower end face is abutted against the upper end face of the hard alloy outer sleeve 7. Meanwhile, the upper end face of the inner ring of the thrust bearing group in the thrust bearing assembly 2 abuts against the outer limit step, and the lower end face abuts against the upper end face of the hard alloy inner sleeve 8. Thereby, an axial limit is formed for the thrust bearing assembly 2.

According to the invention, the measurement system housing 11 is configured to include a curved housing at an end near the drill bit. The outward shaft 4 and the universal joint 41 correspond to the bent housing positions. The universal joint 41 allows the spindle 2 to be connected at an angle, thereby enabling the spindle 2 to accommodate an external curved housing structure. Thereby, the mandrel 2 can generate a certain bending angle under the action of the weight on bit, and the rotation posture of the rotary sliding orientation tool 100 can be regulated and controlled through the weight on bit. The bent shell has the function of guiding the drill bit to point, thereby achieving the directional effect.

As shown in fig. 1, an arc-shaped cushion block 6 is processed at the lower outer circle of the thrust bearing assembly housing 12, and the cushion block 6 can form a fulcrum, so that the curved housing and the cushion block 6 can cooperate to orient the orientation housing 1. The axial distance between the end faces of the outer steps of the spacer block 6 and the lower joint 5 is 1-1.5m. When the pad 6 is at the lower end it is quite convenient to push the drill bit upwards, thus forming a deflecting capability, whereas the drill bit downwards, thus forming a tilting capability.

In one embodiment, the outer part of the cushion block 6 is arc-shaped, and a plurality of hard alloys are arranged, so that the wear resistance is remarkably improved.

An instrument pod 30 is provided on the measurement system housing 11, and the measurement system includes a battery, an orientation sensor, a gamma sensor, and a wireless transmitting coil (not shown) mounted within the instrument pod 30. And, the instrument well 30 is sealed by a sealing cover plate. The orientation sensor and the gamma sensor are capable of measuring formation measurement parameters and transmitting data using a wireless transmitting coil. The directional sensor is used for measuring three parameters of a well bevel angle, an azimuth angle and a tool face angle in real time, the gamma sensor is used for measuring a gamma value of a stratum, and the two sensors are used for transmitting data by using a wireless transmitting coil after measuring. The battery powers the orientation sensor and the gamma sensor, as well as the coil.

In one embodiment, the measuring system housing 11 is made of a non-magnetic material, and 4 grooves are respectively formed on the outer peripheral surface of the measuring system housing 11 for housing a battery, an orientation sensor, a gamma sensor and a wireless transmitting coil. 4 sealing cover plates are arranged on the 4 grooves, a gap with the width of 5mm is reserved in the middle of the cover plate corresponding to the wireless transmitting coil groove, and the gap is filled and sealed by plastic, so that the coil is beneficial to transmitting electromagnetic waves. The inner diameter of the measurement system housing 11 is 10mm larger than the outer diameter of the non-magnetic solid rod 23 to form a radial annulus between the measurement system housing 11 and the mandrel 2 to form a flow passage for drilling fluid.

As shown in fig. 1, a seal cylinder 10 is fixedly connected to the upper end of the measurement system housing 11, and a rotary seal is formed between the seal cylinder 10 and the upper joint 9.

According to the present invention, the rotary slide orientation tool 100 further comprises a cooling lubrication system. The cooling and lubricating system is divided into an upper part and a lower part, and after the drilling fluid flows out from the first overflow hole 221 of the water outlet joint 22, about 5% of the drilling fluid passes through the thrust bearing group and between the hard alloy inner sleeve 8 and the hard alloy outer sleeve 7, so that the thrust bearing group, the hard alloy inner sleeve 8 and the hard alloy outer sleeve 7 are cooled and lubricated, and then discharged to the outer ring space.

The operation of the rotary slide orientation tool 100 according to the present invention is briefly described below.

In actual operation, firstly, a feasible weight-on-bit range is determined according to the requirements of a drilling process, and an intermediate value is taken as a critical value (namely, a preset value). The rotary slip orientation tool 100 is then connected to the drill bit at its lower end via the lower sub 5 and to the upper drill rod at its upper end via the upper sub 9. The upper drill rod comprises a non-magnetic pressure-bearing drill rod and a drill rod. The upper drill rod is connected with the top drive. The top drive directly drives the drill bit to drill through the drill rod and the mandrel 2.

When the bit pressure is regulated to be above a critical value, starting the top drive to regulate to a normal rotating speed, and continuously drilling according to the parameters if the well track meets the design requirement and does not need to be oriented according to the well track requirement.

After drilling a certain distance, if the borehole track deviates from the design, when directional drilling is needed, firstly determining the tool surface, namely the bent angle of the bent shell and the circumferential position of the cushion block according to the requirement of the borehole track. And then the tool face is adjusted at a low rotation speed, after the tool face is adjusted in place, the drilling pressure is reduced to be below a critical value through the directional shell rotation control system, so that the universal joint 41 is disconnected from the directional shell 1, the mandrel 2 is disconnected from the directional shell 1, and the directional shell 1 is kept stationary due to friction force between the cushion block 6 of the directional shell 1 and the well wall. Finally, restarting the top drive rotating speed to the normal rotating speed, and driving the drill string, the mandrel 2 and the drill bit to rotate and drill by the top drive, wherein the directional shell 1 keeps the tool surface unchanged under the action of the friction force of the well wall, so that the purpose of rotating the drill string and sliding and directional drilling of the directional shell is realized, friction resistance can be greatly reduced, and the mechanical drilling speed is improved. At this time, the rotary slide orientation tool 100 is in the directional drilling state, i.e., in the first state.

After a section of drilling, the design target of the well track is reached, and the drilling pressure is regulated again to the compound drilling state. Specifically, the directional casing rotation control system adjusts the drilling pressure to be higher than a preset value, so that the mandrel 2 bends to lean against the inner wall of the directional casing 1, the universal joint 41 contacts with the inner wall of the directional casing 1 through the friction material layer to generate friction force, and the directional casing 1 can be driven to rotate through the friction force, so that the directional casing 1 and the mandrel 2 are integrated, the top drive is started to rotate, the drill string, the mandrel 2, the drill bit and the directional casing 1 synchronously rotate, and compound drilling is performed, or the tool face is slowly rotated and adjusted. At this point, the rotary slide orientation tool 100 is again in the second state.

The rotary slide orientation tool 100 enables switching between the first state and the second state as needed during a drilling operation to conform the borehole trajectory to design requirements to complete the drilling operation.

The rotary slide orientation tool 100 according to the present invention is connected to a drill rod via a mandrel 2 such that the top drive can directly drive the drill bit through the drill rod and the mandrel 2. The curved shell can obviously improve the mechanical drilling speed while enhancing the control capability of the well track through the weight-on-bit control rotary gesture, and when the deviation occurs between the well track and the design, the rotary sliding orientation tool 100 can realize the effect of directional drilling when the drill string rotates, can greatly reduce friction resistance, improves the mechanical drilling speed, adopts a simple and reliable weight-on-bit control means, can replace the current expensive rotary orientation tool, and is very beneficial to reducing the cost. In addition, the rotary sliding orientation tool 100 can also realize near-bit testing through a measurement system to measure formation parameters, which can effectively ensure the accuracy of the measured parameters and is very beneficial to drilling operation.

In the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that the above description is only of a preferred embodiment of the invention and is not to be construed as limiting the invention in any way. Although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the techniques described in the foregoing examples, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. A rotary slide orientation tool comprising:

an orientation housing (1);

a mandrel (2) concentrically arranged in the directional shell, wherein the upper end of the mandrel is connected with a drill rod, and the lower end of the mandrel is connected with a drill bit;

a measurement system mounted on the directional housing at a location proximate the drill bit; and

a directional housing rotation control system comprising a cardan shaft (4);

wherein the drill rod drives the drill bit to drill in rotation through the mandrel, and near-bit measurement is performed through the measurement system,

in the first state, the bit pressure is regulated to be larger than a preset value through the directional shell rotation control system, so that the mandrel is bent to lean against the inner wall of the directional shell and generate friction force, the directional shell can be driven to rotate through the friction force, compound drilling is carried out, or a tool surface is regulated in a rotating way,

in a second state, the directional casing rotation control system is used for adjusting the bit pressure to be smaller than a preset value, so that the directional casing is separated from the mandrel, and the tool face is kept unchanged under the action of the friction force of the well wall, so that the directional casing can perform directional drilling when the drill string rotates.

2. The rotary slide orientation tool according to claim 1, wherein the spindle comprises a hollow rod (21), a water outlet joint (22), a non-magnetic solid rod (23), and a water inlet joint (24) connected in sequence from top to bottom,

the universal shaft is connected between the nonmagnetic solid rod and the water inlet joint, and the universal shaft is connected with the nonmagnetic solid rod through a universal joint (41).

3. The rotary slide orientation tool according to claim 2, wherein a friction material layer is provided on an outer surface of the universal joint, and the spindle is capable of generating friction force against an inner wall surface of the orientation housing through the universal joint and through the friction material layer.

4. A rotary slide orientation tool according to claim 2 or 3, characterized in that a lower joint (5) is fixedly connected to the lower end of the water inlet joint, said lower joint being intended for connection to a drill bit, a thrust bearing assembly (2) being provided between the lower joint and the orientation housing.

5. The rotary slide orientation tool according to claim 4, wherein the water outlet joint is provided with a first flow aperture (221), the water inlet joint is provided with a second flow aperture (241),

the inner flow passage of the hollow rod, the first overflow hole, the radial annular space between the directional shell and the mandrel, the second overflow hole and the inner flow passage of the lower joint are sequentially communicated to form an overflow passage through which drilling fluid can flow to the drill bit.

6. A rotary slide orientation tool according to any of claims 1-3, characterized in that the orientation housing comprises a measurement system housing (11) and a thrust bearing housing (12) connected to the lower end of the measurement system housing.

7. The rotary slide orientation tool of claim 6, wherein the measurement system housing is configured to include a curved housing at an end proximate the drill bit.

8. A rotary slide orientation tool according to claim 7, characterized in that a spacer (6) is provided on the outer surface of the thrust bearing housing, the curved housing and the spacer being co-operable to orient the orientation housing.

9. The rotary slide orientation tool of claim 8, wherein an axial spacing between the pad and the lower joint is in the range of 1-1.5m.

10. The rotary slide orientation tool according to claim 6, wherein an instrument pod (30) is provided on the measurement system housing, the measurement system comprising a battery, an orientation sensor, a gamma sensor and a wireless transmitting coil mounted in the instrument pod, the instrument pod being sealed by a sealing cover plate,

the orientation sensor and the gamma sensor are capable of measuring formation measurement parameters and transmitting data using the wireless transmitting coil.

11. The rotary slide orientation tool according to claim 6, wherein the inner wall of the lower end of the thrust bearing housing is fixedly connected with a cemented carbide outer sleeve (7), the outer wall of the lower joint is fixedly connected with a cemented carbide inner sleeve (8), and the cemented carbide inner sleeve is positioned inside the cemented carbide outer sleeve with a gap formed therebetween, thereby forming a radial bearing.

12. The rotary slip orientation tool according to claim 6, wherein the upper end of the mandrel is connected to a drill rod by an upper joint (9), and a sealing cylinder (10) is fixedly connected to the upper end of the measuring system housing, the sealing cylinder and the upper joint forming a rotary seal therebetween.

13. The rotary slide orientation tool of any one of claims 1-12 further comprising a cooling lubrication system.

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