SA111320856B1 - Electrical Controller For Anti-Stall Tools For Downhole Drilling Assemblies - Google Patents

Abstract

This invention relates to an anti-stall tool in a well drilling assembly that controls the reciprocation of the drill bit with an electrical controller that changes the weight-on-bit (WOB) according to the measured downhole pressure or torque. Torque at a downhole motor. The electrical controller receives the preset upper and lower working pressure limits of the downhole motor and operates a hydraulic valve system to keep the drill bit rotating by maintaining weight on the bit during normal drilling operations, and increasing weight on the bit if the sensed working pressure indicates If the bit loading or torque decreases in an undesirable way, reverse the weight on the bit by retracting the bit if an increase in working pressure or torque is sensed.

Description

Y

An electrical control device for tools to prevent sudden stoppage of downhole drilling installations

Electrical controller for anti-stall tools for downhole drilling assemblies Full description Background of the invention anti-stall tool The present invention makes improvements to the anti-stall tool control device for operating the anti-stall tool electrical controller More is an electrical controller 3835 «controllers drilling in weight on the auger during drilling operations aSaall antisstall tool (AST) sudden -operations e0 positive below the daly) requires the use of a motor coiled tubing drilling drilling with flexible tubes: To rotate the drilling bit and during drilling operations, the downhole positive displacement motor (PDM) rotates at constant rpm and produces a motor pressure from the bit and a fluid flow rate relative to the “freespin” motor. pressure “free rotation” weight: indicated by the weight on the drill (lB) When the drill meets the base of the pimple and the force moves to 0, the motor senses an increase in torque, and this increase in torque is con-bit (WOB ) to rotate at a constant number of revolutions per minute (assuming the stability of the flow rate resistance due to the increase in resistance, and the positive displacement motor in turn requires additional pressure to rotate the motor at a number of revolutions. (constant flow rate fixed per minute under increasing resistance. If the resistance increases to a degree that prevents the positive displacement motor from rotating (an increase in weight on the drill), a sudden stop of the motor occurs. During the sudden stop of the motor ve

YoY. z

; The motor stops running and the path of the fluid down the well is severely obstructed; The surface pressure of the pump increases in the form of a pin, and this event can eventually lead to motor failure, which stops the drilling process and the flexible tubes become in a stress cycle when the bit is pulled from the bottom and back into the wart to start drilling Ba Others A description of a stoppage prevention tool is found in US Patent 0 Publication No. 00048/01977846 to Mock etal A downhole tool Lidl that monitors engine pressure and greatly reduces the occurrence of engine stalls will increase overall efficiency For drilling overall drilling efficiency, by the following: (Y) Increasing the average cavity rate of penetration, and this is done by decreasing the times of drag above the base every time the motor stops suddenly. Reducing fatigue cycles on the flexible pipes, which increases the number of wells that the -coiled tubing string can serve by achieving drilling operations More Efficient Operators can achieve a significant increase in wellhead drilling cost savings. The present invention provides an electrical control device for the anti-stop tool that controls the weight on the drill during drilling operations, thus achieving better drilling efficiency as a whole. General description of the invention in brief The invention consists of an electrical control device for the sudden stop prevention tool for use in assembling the downhole assembly idl equipment next to the base of the pipes adjacent to the positive displacement motor (PDM) 0 and the drill bit “drill bit” and in one embodiments, the tubes contain YoY.

On flexible tubes, although the invention can also be used in rotary drilling capplications, an electric drilling rig controls the force applied to the drill bit while drilling to prevent the drill bit from suddenly stopping under loads; The working pressure range of the positive displacement motor is sensed while using the hydraulic valve control system 0 and is used as an input to the controller. The controller changes the weight on the auger if the downstream equipment pressure exceeds any of the maximum values of a predetermined working pressure range in the system; (1) Gok maintains weight on the bit during normal drilling operations; 5 (Y) increases weight on the bit if the working pressure sensing positive displacement motor indicates that the bit is loaded Drilling Low” and (7) 0 reduce the weight on the bit which lowers the back-pressure to retract the drill bit from the base if excessive working pressure is sensed as a result of the increased torque ae of the positive displacement motor. Sudden generally contains one or more hydraulic cylinders to achieve an axial force in a forward direction or reverse direction UW direction 0 The electrical control device contains electronics and a system of valves Hydraulic system of hydraulic valves configured to control 348 piston force in either forward or reverse direction; one positive stage of the anti-stop response to the positive displacement motor produces low pressures in gear below A (below a specified low pressure value advance) by pushing one or more pistons in the direction of downhole equipment to increase the weight on the drill, which raises the return pressure from the positive displacement motor. And when the positive displacement motor operates within a range

Normal operating pressure The control device closes the piston in the negative state where the pistons are closed tightly and the anti-stop device transfers the force from the pipes to the drill bit If the controller senses a predetermined high pressure or greater than it due to the high torque in the positive displacement motor, the valve system It reverses the hydraulic flow in the pistons, which reduces the weight 0 on the drill to push the drill bit away from the bottom to reduce the pressure Spall from the positive displacement motor. One embodiment of the invention includes a method for preventing sudden stoppage of control of drilling operations in a downhole equipment assembly comprising tubing extending below the wart and a tubing-mounted drill bit; a positive displacement motor to rotate the 'ill' bit and an anti-stop device adjacent to the positive displacement 0 motor; The method includes sensing the pressure in the positive displacement motor and providing a range of operating pressures for the positive displacement motor known as the upper and lower limits of the operating pressures. Operation of the sudden stop prevention tool in: (1) an active stage to increase the weight forces on the drill in the downhole direction when the lower operating pressure is sensed” (Y)s a reverse stage to save the weight forces on the auger in reverse when the upper limit of the operating pressure is sensed; and ( ) an optional passive stage 1 in which the anti-stop device closes to transfer the weight on the auger from the tubing to the drill bit directly when the positive displacement motor is operating within range normal operating pressure.Another embodiment of the invention comprises a spring-operated anti-stop tool 201-5011 modified for use in a downstream kit (jl) comprising tubes for downstream extension ll. and a bore-mounted drill bit. pipes; and a positive displacement motor attached to the drill bit to rotate the drill bit

a

Drilling during drilling operations and the sudden stop prevention device that operates on a spring loaded on the pipes and placed adjacent to the positive displacement motor to prevent sudden stopping of the positive displacement motor due to excessive loads on the drill bit. A spring-operated anti-stop has at least one piston in a cylinder having a forward piston space and a reverse piston space; It contains an electric controller

on the electronics and hydraulic valve system for piston control operations; The front piston space receives hydraulic fluid to generate force in the downward direction of the blisters, and the reverse piston space contains a loading spring that is adjusted to achieve an upward spring force on the piston. The electric control device adjusts the weight on the drill in response to the positive displacement engine operating pressures that are sensed. Enter the desired range of operating pressures for the positive displacement engine incl

0 upper limit and limit (Jind) and the controller operates the valve system for the following: (1) extending the hydraulic fluid to the forward piston area to increase the weight force on the drill in the direction down the pimple when the operating pressure in the engine exceeds positive displacement lower limit; and (vii) vent the piston volume in the piston front space so that a compressed spring forces the tool into the blister to reduce weight on the drill when the operating pressure in the positive displacement engine increases the limit

0 up” and (©) GASH lock optionally in negative state when positive displacement motor operates within

normal operating pressure range. An embodiment of the AT has an improved stop aid that produces controlled translational motion of the drill bit (led and increases ial efficiency) and a stop aid that controls the force applied to the drill bit while drilling. To prevent the drill bit from suddenly stopping 0 due to a deal, the anti-stop tool contains one or more hydraulic cylinders to achieve the YoY force.

no

pivots in either forward or reverse directions; And an electrical control device that is adapted to control the force of one or more hydraulic cylinders on the drill bit in response to the working pressure of the drive motor that is sensed during drilling operations. The controller contains a system to adjust the weight on the drill when the working pressure increases any of the both ends of the working pressure range of an engine

© payment; The system contains (1) a passive stage to maintain the weight on the drill when the working pressure is within the predetermined normal operating range and (3) a positive active stage (6) to sign the pressure on one or more cylinders Weight on the drill when the working pressure that is sensed is less than the predetermined limit and (7) a reverse stage to reverse the pressure of one cylinder or more than one cylinder to reduce the weight on the drill and then withdraw

0 drill bit from base when the sensing working pressure becomes higher than a preset limit and the tool is normally controlled to achieve weight on the bit at pressures within the wide range of required pressures; When the preset anti-stall pressure is reached, the tool reverses to reduce weight

on the drill and do not continue to achieve the weight on the drill over a predetermined wide range of pressure drop

PDM back-pressure drop ll for positive displacement drive. 0 and in the AT embodiment the tool can achieve weight on the auger over a wide range of operating pressures through two stages on (JI one of these is dab) as the pressure rises Ja a specified pressure is required and then switches the tool to the closed position At this pressure and above it to a predetermined limit to prevent sudden stops at which flow is reversed to the pistons to raise the drill bit; The two phases can also be operated as a positive phase/reverse phase. YoY.

A

These and other aspects of the invention including additional embodiments are to be fully understood with reference to the following detailed description and accompanying drawings. BRIEF EXPLANATION OF DRAWINGS Fig. (1) A schematic drawing showing a bottom gear assembly containing the anti-stop device 0 according to the principles of this invention. (Y) JS) shows a horizontal section of one embodiment of the anti-stop device being Hydraulically operated. Figure (7) front view showing the AT embodiment of the anti-stall device. Figure (;) a horizontal section showing the anti-stall device in Figure 3 with a schematic diagram of an enhanced control device. 0 Figure (5) a horizontal section of a rendering The last alternative to a spring-operated anti-stop device. control valve according to the principles of this invention. Horizontal electrically controlled anti-stop containing electronics package and electric motor for gear below blisters on the anti-stop.

Figure 1 shows a schematic diagram of the 01 tubing drilling system for well bore J drilling in an underground formation 11 and the tubing drilling system can include a coiled tubing reel 14 and a curve guide ( gooseneck tubing 07 06”, “tubing injector YA”, flexible tubing “Yo”, flexible tubing “coiled 71” ctubing connector 0 and drill bit “YY” at the base of the blistering hole as Fig. 1 shows Also control cab 4, power unit 77 power pack and stacking for other equipment of AY bottom blister collector and tractor (not shown) as described in US Patent No. 472487?; cannot be used. To move downhole equipment inside the hole; Patent 187' includes here in its entirety by pointing at it and while drilling the downhole equipment A contains a downhole motor Jie YA 0 positive displacement motor to rotate the drill bit and aie tool snap stop According to the principles of the present invention, they are placed adjacent to the base of the flexible tubing in the opposite direction of the motor under Jal and the drill bit. In the al embodiments, the hydraulic pressure returned through the flexible tubing is measured at the surface, and the torque produced at the drill bit during drilling operations is directly related to the pressure. cipal) and as a result the hydraulic measurements of the back pressure can be sensed and used as inputs to the control valve system

1 hydraulic located in the anti-stop device. The Yo Sudden Stop Tool involves the use of a series of hydraulic cylinders and three pressure actuated valves to control the weight on the auger while drilling and this tool will create a bles motor pressure sensor down (ad) in real time which will change the weight on the auger to maintain The drilling rate of penetration is relatively constant and feedback is sent to the flexible pipe worker to adjust the rate of the flexible pipe injector

To match positive displacement engine pressure. YoY.

Ye down the well to change the weight on the YA and the invention uses the operating pressure range of the positive displacement motor and during drilling operations the drill celal prevention tool if the downhole pressure exceeds any of the range limits sudden stop controls the weight on the drill through Uses three different operations: positive weight on the drill; And the weight on the drill is negative and reverse direction.‎

0 Figure (Y) illustrates an embodiment of the anti-stop tool 70, which includes a series of hydraulic cylinders aligned axially with separate pistons. The piston spaces are known as Al, 42 A3A, 33, 36, and 30. “Yo” and Figure (Y) also schematically show a hydraulic control device YE located in the anti-stop device; The control device contains a pressure reducing valve 1 and a reverser valve YA

filter 47 The hydraulic control fluid passes through the filter event valve £ + 8178 0 operating pressure set points or call points or values in follow-up that are related to the operating range of the flexible tubing machine. Using the anti-stop tool in values, for example, would include using different ranges of “rotary drilling operations” ~control valve set points for operating pressure or control valve set points.

0 The first stage of the anti-stall hydraulic device activates when the positive displacement motor

Unloaded produces low pressures down the well, for example if the positive displacement engine creates a return pressure of 0 psi (to be adjusted according to the specific requirements of the engine); And the sudden stop prevention tool is in the positive phase of the weight on the drill, which leads to the supply of pressure to all the pistons, which will produce a force towards the bottom of the well (AA Al) and it is possible ((A3C) and when the weight is placed on the drill, the natural reaction is © The positive displacement engine aly has more pressure.And when the anti-stop senses the YoY.

1

Sudden boost pressure to “Yoo psi” (can be adjusted to specific engine requirements)

The pressure reducing valve 77 will stop any further flow to the pistons and lock the pistons hydraulically in

The negative phase of the weight on the drill.

In the positive phase of the weight on the auger the anti-stop transfers the force from the tubes to the auger; The instrument acts as a rigid member and monitors pressure return from the displacement motor

cation; The pressure reducing valve TU closes and seals the fluid in the pistons A3A) and it is possible

(ASC) that produces a force in the downward direction of the blister. All pressure generated by the weight on the auger will be in

Hermetically sealed volumes in the piston.

During the final stage of the anti-stop device, the back pressure due to the high torque 0 in the positive displacement engine excites the reverser valve YA and the vent valve 56 vent.

valve to reduce weight on the auger; When the pressure aa reaches 0001 psi” (can

(modified to specific engine requirements) the YA reversing valve diverts fluid flow to the pistons

Which produces a force in the direction of the highest pimple (A2) and 8335 (A3D5) and at the same time the ventilation pleaa Ev

Ventilates the opposite side of these staplers; This allows the tool to travel up the blister and reduce the weight 1 on the auger thus reducing the positive displacement motor back pressure; When the back pressure drops

For positive displacement engine less than reversing valve values (including idling) the reversing valve is YA

It will turn back to its original position.

The anti-stop is designed to be fully extended at low pressures; This alignment

Allows the tool to have a full stroke length and can retract to any degree it needs until the return pressure of the positive displacement actuator drops below the lower limit of the vent valve; Then you will try the tool

‎YoY.

VY

Sudden stop may not fully expand, but pressure can rise to pressure control valve values or higher and limit expansion. Therefore, increasing the length of the stroke will allow several steps of contraction before it exhausts all the length of the stroke. The flexible tubing operator can adjust the speed of the flexible tubing entering the blister to avoid full retraction of the anti-stop device; And the worker can see a change in pressure oo the pump with each contraction to indicate the need to reduce the speed of entering the flexible pipes. The anti-stop system operates as an open system; The drilling fluid from the surface is pumped down the blister in the pipes through the tool to the motor to rotate the drill bit. Most of the fluid flow in the system is used to drive the drill bit. A small amount of fluid is used for the control device and during use is jetted out to the sides and into the annulus. 0 The anti-stop tool includes splines in the torque sector ££torque section which contains We external to the spline housing and tongues inside the piston housing and the tongues de pend allows the base of the blister to maintain its orientation with respect to For motor and drill bits without the unwanted ripple. The tabs allow the tool to be used with the A) steerable base set; A steerable downhole assembly can be controlled to drill a well to the desired location while al changes direction during ve drilling to achieve this objective; The tongues allow the positive displacement motor and auger to maintain alignment with the thrusters that may be higher than the blister relative to the anti-stop tool. Torque load is transmitted from the positive displacement motor through the outer casings and through the anti-stop tongue to the tools above ll for the anti-stop; No direct load is applied to the inner shafts as a result of the torque, and the tongue sector works in both the expansion and contraction of the tool to prevent sudden stops. ‎YoY.

VY

To produce a controlled travel movement of 7 0” Figures (3) 5 (£) illustrate an improvement to the anti-stop tool Three stages of the drill bit increase drilling efficiency. This embodiment shown includes a series of axially aligned hydraulic cylinders with rams Rotation of the tool at ale and 8383 and the A3A A25 Als ST section is shown cooperating to be the piston spaces with a hydraulic control device located in the anti-stop device and shown schematically at £7 and the control device at £6 0

OF, a pilot valve 0+, a pilot valve (A) containing a 0% pressure control valve, a filter to the controller at 0f, and a sequence valve. In one embodiment, the controller has three phases of operation. : and (1) positive; (7) negative” and (7) (4): (deflation” and the control valves located in the area of the instrument control device are shown schematically in the figure, where the pressure lines appear as solid lines, and the experimental lines as dashed lines Exhaust lines 0 as dotted lines In the following explanation the pressure limits are used as an example only and are adjustable according to the specific requirements of the engine. inches', for example, the hydraulic pistons strike 4000 positive displacement; if the pressure is less than the positive displacement motor back pressure is generated; the vent valve opens; 5 in the control device and supplies Jul force vo psi" the vent valve closes 4000 with a pilot signal; if the pressure reaches 0 the pilot valve and the pilot line is breathed to the pilot valve 04 but the retaining pilot valve remains in its place of tA and the back pressure of the positive displacement motor is sensed by the pressure control valve psi / inch Vor the well that is sensed to Jad and the pistons anticipate a downward force until a pressure reaches, for example, which represents a required working pressure. Ys

YoY.

d" Then the pressure control valve turns the anti-stop into the negative state when the sensed pressure reaches the required drilling pressure of 7156 psi' for example; here the pressure control valve stops the pistons and closes the pistons hydraulically in the negative state of the weight at The pressure control valve $A closes and no pressure is sent to the pistons; the pistons oo are closed tightly and the current force is transmitted to the drill bit and the motor pressure does not increase; the pressure below the blister continues to be monitored in the negative state via vent valve 0f and the oF relay valve that monitors the change in pressure in the flexible tubing; the passive state continues until the pressure ddl sensed reaches Ave psi' for example. and when the pressure below the blister reaches a level of 8000 psi The sudden stop prevention device turns 0 into the reverse state, that is, if the torque increases in the positive displacement engine, it causes an increase in the return pressure; Engine stalling is avoided by sensing and responding to back pressure below the engine stall level; Any 800 psi' or any other pressure less than that at which the stop can occur. Lovie pressure sensor reaches Ave psi' relay valve opens OY which is normally closed in 1; It sends a pilot signal to the pilot valve 00, which reverses the hydraulic fluid flow to the pistons to produce a force in the direction of all to reduce the weight on the drill. When the return pressure drops below 800 psi” the pilot signal from relay valve oY to pilot valve closes; The OFF relay valve vents the pilot signal and continues until the sensor positive displacement actuator pressure drops to 4008 psi" at which point the vent valve YoY opens. yo

OF and sends a pilot signal to pilot valve 00 to return to the positive state by supplying fluid pressure

to the pistons to expand and project the downward force to increase the weight on the drill.

So in this embodiment the tool is controlled to strike the weight on the drill bit when drilling at pressures in

Limits to a wide desired range of pressures” and these can be from 400 to 800 psi” for example; and upon reaching a predetermined pressure anti-stop as Ave psi

Which can be a safe level below the pressure at which the stop occurs lad the tool reverses

Do not continue to sign the weight in the auger over a predetermined wide range to lower the pressure before resuming

active operations of the weight on the auger; sadly wide pressure drop can be of approx

0 to approximately 70001 lb/in'; In the embodiments shown the pressure drop range is Eee 0 psi" (from 800 to 406 psi') before the weight on the auger is resumed.

ass the tool by projecting the weight onto the auger during the required wide range of operating pressures through

two stage” one stage where the pressure is raised to a specified operating pressure; For example 156

lbs / inch" and then switches to a closed position in a second stage at this pressure and higher than it until it reaches a limit

anti-stop For example Ave psi” before reversing flow to the rams and raising 1 drill bit.

One of the main features of the crash prevention tool is that the only Jind necessary to run the tool is;

The instrument only needs to sense and respond to the back pressure from the positive displacement motor; And in the sense

Other The anti-stall device acts at specific points of working pressure (although it can be modified

(adjustable) The fixed set points can be precisely adjusted to control the limit value at which the “0” valve opens and closes and as a result the penetration rate of the drill bit is more uniform.

‎YoY.

An alternative embodiment of the invention includes a two-stage anti-stop method for control of drilling operations in

The bottom collector a which contains the tubes that extend down the ill and the drill bit carried on the

pipes; and a positive displacement motor to rotate the drill bit and a device to prevent sudden stops adjacent to the motor

positive displacement This method includes pressure sensing in the positive displacement motor, which achieves a range © of the operating pressures of the positive displacement motor, which is defined by the upper and lower limits of the operating pressures;

Operation of the anti-stop tool in: (1) a positive phase increases the weight forces on the drill in one direction

Below Jal when the lower limit of the operating pressure is sensed and () a reverse stage achieves a force in

Reverse thrust lowers the weight on the auger when the upper operating pressure is sensed.

This two-stage shutdown prevention method can be achieved by adjusting the 0 oF relay valve setting to equal or lower than the pressure control valve EA; But lef of the vent valve value is 08

The sudden stop prevention device can also work in the two-phase method

In combination with a negative range it works between a small range of pressure settings (as previously explained).

Different orifice adjustments can be used to control the speed at which it responds

Lae tool” and the hole not shown in the figure oY) and the hole could be on the exhaust of the reversing valve ve JA

Although the schematic diagram in Figure (2) shows a single hole 00, those skilled in the field know

The two-way / four-way valve contains two exhaust outlets; And each of the directors is the same space.

different pistons; whether the piston is spaced to produce a downward force a (expansion) or a higher force ad (contraction);

Using the upper and lower limits of the operating pressures, the orifice sizes can be calculated to limit the flow rate

Volumetric winding of the consumed fluid through the valve, thus controlling the speed at which the tool baie expands or contracts. Alternatively, the weight on the auger can be controlled with a combination of control valve settings and adjusting hole sizes. Example 0 The following specification illustrates an embodiment of the anti-stall device. Z YoY.

Ya

The design is flexible in that the pressure and hole size settings can be changed for fine tuning 3180 If a greater weight change is required on the drill then the shaft can be replaced to allow for the installation of additional staples. lea) space below | The value of the control valve in | Maximum ay on number of pistons Sal) auger pressure from preventer (as (psi) (lbs/in)) snap stop (lbs) 0 Foal stop preventer cylinders and valves can be made of different materials Corrosion-resistant materials include tungsten carbide, inconel, MP33 Ji high strength nickel alloyed steel, cberyllium-copper and the like. Tool from sudden stop the following: -1 0 Weight on aug positive: Tool will attempt to return to full extension when pressure BY decreases from To psi' If engine complete stop occurs and anti stop tool retracts drill bit away from the base the positive weight stage on the bit will produce minimal weight on the bit and push the bit down the blister until the positive displacement motor pressure exceeds 150psi.” ‎YoY.

"-Negative Weight-On-Drill: Terminates the positive phase of the weight-on-drill and allows the flexible tubing to transfer the weight on the bit to the bit; prevents overweight on the bit that can occur when positive displacement drive pressure rises and acts on the pistons to produce downhole force. —F Reverse: Lowers weight on the drill to prevent motor stalling.

0 4- The torque wrench transmits the torque to the flexible pipe through the sudden stop prevention device. A bottom tool that monitors engine pressure and greatly reduces the occurrence of engine stall will increase overall drilling efficiency by: (i) increasing the average rate of penetration; this is achieved thereby reducing the occurrence of over bed drag for engine stall.

(1) 0 Reducing positive displacement motor failures through frequent stopping of the motor, which reduces the occurrence of downtime. 9) Reducing stress cycles on the flexible pipes, and this increases the number of wells that the flexible pipes can serve. Figure 0: The spring-operated anti-stop device 111 according to this invention is shown; and in the following explanation

1 Engine compression values are for example only and depend on specific engine requirements and can be adjusted accordingly. The embodiment in Figure (0) contains a series of axially lined hydraulic cylinders with separate pistons. The piston spaces are known as A3A 5 A25 Al, 38 and 30 m, and the torque sector of the tool is shown at 70. And the size of the A3D stapler

© It contains a pressure spring that generates a force of 72. Figure (7) also shows a schematic diagram of a VE control device located in

0 e a

sudden stop prevention device; The control device contains a pressure reducing valve 17 and a vent valve ATA, and the hydraulic fluid passes through a filter NE In the following description, the specified working pressure points or values are related to the operating limits of the flexible pipe equipment; The use of the anti-stop tool in circular drilling operations for example oo includes the use of different operating pressure limits or set points for the control valve. The first stage of the spring-actuated deadbolt 110 activates when the unloaded positive displacement motor produces low pressures below A, for example if the positive displacement motor 01 generates a pressure of 7000 She psi'; The spring-loaded tool will be in the positive phase of the weight on the drill; This causes pressure to be supplied to all pistons that generate a downward force (Al) Sal AAS 0 and it is possible ¢(A3C) and this will compress and load the springs with a spring force of 71 5 F2 and when the weight falls on the drill the natural reaction is the positive displacement engine generates pressure SS) and when the tool senses the pressure increase to Yoo psi' (adjusted to the specific requirements of the engine); The pressure reducing valve 1776 will prevent overflow to the pistons and the pistons will close hydraulically in the negative phase of the weight on the auger. ve in the negative phase of the weight on the drill the spring-loaded tool transfers force from the coil to the drill; The instrument acts as a rigid component and monitors the positive displacement engine's return pressure; The 1” pressure reducing valve closes and the fluid is hermetically sealed in the pistons ABA (and possible 430) which produces a force down the blister and all the pressure produced by the weight on the auger is found in the volumes of the hermetically sealed pistons.

In the final stage of the spring-powered tool, the return pressure, as a result of the high torque, pulls the drill from the base; When the positive displacement engine reaches 178 psi, the vent valve search is psi' (can be adjusted to specific engine requirements); Valve 001 return pressure to and 12 springs FI 8360 and resulting forces ABA ventilation 78 vents the piston volumes, which reduces the weight on the drill and thus reduces the pressure all Jef compressed will push the tool © of the displacement motor Positive is less than all positive displacement engine return values and when the pressure drops vent valve (including idling) the tool will switch to one of the other operating phases. Hydraulic control; except Beal to 0 shows two anti-stop designs of which 1 Figures have a two-position pilot valve OA that Figure 1 shows an alternative embodiment of a four-way anti-stop with pressure control valve 17; And the electrical control device can be set in 1 0 to 0 and the embodiment as in the figure 1 embodiments of the anti-stop device shown Figures from To change the weight on YA Ja depends on the use of the working pressure range of the positive displacement motor below If Downhole pressure exceeds any of the working range limits of the downhole positive displacement motor (lial) 264 operating power of the downhole electric motor sae Alternatively, this embodiment can be used to shift the weight on the drill bit if the power consumption exceeds any of the operating range limits the engine; During ve drilling operations the Snap Stop Tool 58 will control the weight on the bit through the use of three distinct operations: positive weight on the bit; negative weight on the drill; and atop the base. The unloaded positive displacement Lovie motor and the anti-stop 1st stage activate

PDM and For example, if the positive displacement engine and drill bit jets “all generate low pressures downstream create a return pressure of 700 psi” then the drill bit jets will be in phase

YoY.

YY

positive weight on the drill; This means that the pressure will reach all the pistons in the anti-stop tool, and when the weight hits the auger ((A3A5 AL) suddenly, which will produce a force in the direction of the bottom of the blister. The natural reaction of the positive displacement motor is to generate more pressure, and when it reaches pressure to psi” For example, the electronic group 17 receiving the input related to 0 to shift valve 14 will send a signal to the actuator pressure transducer TA with pressure from the pressure transducer © Four-way modes push Jb Pilot 0; the pilot valve is a motorized winding valve; the pilot valve determines whether the anti-stop will expand or retract; and when the anti-stop senses a pressure increase to 150 psi”'' (can be adjusted as per will stop any additional flow to TY (specified engine requirements) the pressure control valve pistons and hydraulically closes the stop stop pistons in the negative phase of the weight on the aug. 0 in the negative phase of the weight on the aug the prevent stop The sudden stop preventer acts as a rigid component and simply maintains pressure idl to the return auger of the positive displacement motor; The pressure control valve closes and seals the fluid in the pistons, and all the pressure resulting from the weight on the drill will create a call that produces a downward force (A3A 5 Al) in the tightly closed piston volumes. 0 as a result of the high torque ial) and in the final stage of the sudden stop prevention tool, the pressure sends signals to the electronic group 77 through the pressure transducer ask of the positive displacement motor

Ave and pull the auger out of the bottom; When the return pressure reaches 01 to TA pilot valve shunt psi” (over-bottom values can be adjusted to specific engine requirements) and the electronic TE pressure/set shunt transducer sends a signal to the downhole electric actuator ©

YoY.

love

pilot valve and then diverting the fluid flow to the pistons

up direction (A2) idl, 335m); This allows the tool to travel up the well and reduces weight on the CE

Jul, backpressure Dad reduces positive displacement; When the pressure drops below values

Positive of weight on the drill (00; lbs/in') the pressure transducer//electronic assembly sends a 0 signal to the electric motor below ll to convert the positions of the pilot valve; Once the pilot valve returns

to its original position the anti-stop will return to the positive phase of the weight on the auger;

The electronic assembly VE receives pressure as input from the pressure transducer 76 and sends a signal to the actuator

Not to turn the pilot valve Vo

Figure (V) shows a three-position, four-way pilot valve 71; An alternative embodiment of Fig. (v) 00 is based on the use of a single valve to control the anti-stop device; And the pilot valve, Ve

It is a three-position, four-way, motor-driven spool valve; and the central position of the valve

The pilot generates the necessary hydraulic seal for the negative stage of the weight on the countersink.

Figure (A) shows a horizontal section of the electrically controlled anti-stop 08 containing

VA torque converter (or other sensor); and electronic assembly 17 and pilot valve 0 01 driven by an electric motor inside the casing.

Example

Specifications for one embodiment of the anti-stall device shown in Figures 1 through /

‎YoY.

Y¢ = gt The maximum degree of freedom and the design of the electrically controlled anti-stop device is flexible in terms of the possibility of changing the pressure values. The communication methods currently available include pulses, pressure settings, fiber optic and wireline, fiberglass and cables, mud pulse telemetry, drilling fluid. Bottom space valve_control_value in | maximum weight on the drill ea stop ae sll number of staples | Well Pressure from (psi) Snap (psi) (mr)

YoY.

Yo Features and Benefits The electrically controlled anti stop tool features are described below: Weight on positive drill: Tool will attempt to return to fully extended position when 0 lbs/in; If the motor stalls and the tool suddenly stops 1500 pressure drops by dragging the bit over the base the positive phase weight on the bit will produce a minimum weight above 0 lbs./in.'. 150 below the blister until the displacement motor pressure exceeds Gla) Z drill and pay

M Weight over negative auger: stops the positive phase of the weight over auger and allows tubing

Flexibility transfers the weight on the drill to the drill; And it prevents the extra weight over the drill that is possible

It occurs whenever (ait) the pressure of the positive displacement engine and acts on the pistons to produce downhole force.

0 Over Base 01200000: The auger is pulled over the base to prevent the motor from stalling.

0 torque sector transmits torque through the anti-stop to the flexible tubing. And a tool down the well that monitors the engine pressure and greatly reduces the occurrence of engine stoppages to raise the overall drilling efficiency as follows:

ve increased the average rate of penetration, thus reducing the occurrence of drag above the leaders for engine stalls. Positive displacement engine losses are reduced through frequent engine stops and so there is less down-blown failure. YoY.

Js oe stress cycles on the flexible pipe and this will increase the number of wells that the flexible pipe tape can serve. By achieving more efficient drilling operations, the worker can actually increase the savings in the cost of drilling the well. ALTERNATIVE MODES OF OPERATION 0 In place of the absolute pressure transducer, the anti-stop tool can sense the following: the differential pressure between the annulus and the bore using the differential pressure transducer. the load transmitted through the tool or the weight on the auger Using a load cell Torque transmitted through the tool using a torque transducer 0 Decrease the rotational speed using a torsional accelerometer If the system is connected to an electric motor instead of a hydraulic motor, the anti-stop tool can Sensing: change in voltage , change in electric current 0 Although the invention is described in connection with SUT oil drilling and use with flexible tubing, the invention has other applications including: joint tubing or drilling and in operations other than drilling where it is advantageous to retract a tool at high pressures or where adjustments are made to the drill bit to maintain contact with the formation or to lift the bit completely out of the formation.” Although the invention is described with reference to a drill bit used in drilling petroleum wells in formations Underground, however, the invention 0 can also be used in combination with other pressure tools such as high pressure flow tools.

Anti-stop cylinders and valves can be made of various anti-corrosion materials including tungsten carbide, etconyl, high strength nickel alloy steel such as 00035, beryllium-copper and the like. YovY.

Claims (1)

YA protective elements anti- downhole assembly Jill downhole assembly Jill 1.1 1 drill bit jis includes downhole assembly idl and downhole stall drilling operations ~~ ¥ drilling alasy tubing, drill bit tubes to rotate the drill bit, a drive motor, a ¥ anti-stall tool placed between the tubes, and a “drive motor” for the fluid ¢ during operations drill bit to control the force applied to the drill bit drive motor Nulls and drive motor 0 and cunder load tool to prevent the drill bit from stopping under load in order to prevent the drill bit couter housing ala It contains: Casing anti-stall tool v from drilling fluid to transport drilling fluid housing extends through the casing internal passageway A drill bit to rotate the drill bit drive motor to tubing tubing 4 outer housing Open loop controller 0 on: open loop controller The open loop controller contains 1 couter housing in sliding consistency in the outer casing piston assembly piston group VY The aforementioned .piston assembly wlll extends through the internal passageway and the internal path Or -piston assembly Reverse direction to adjust the weight downhole in any direction down the blister axial forces 0 during drilling weight-on-bit (WOB) on the drill 17 outer located in the outer casing hydraulic control valve system Hydraulic control valve system 1A from drilling fluid hydraulic control fluid to receive hydraulic control fluid inlet with inlet housing 0 YoY. Yq Supply_hydraulic control fluid: 016021 passageway in the inner path fluid drilling 0 .piston assembly to the piston group hydraulic control fluid 1 -weight-on-bit (WOB) to control the weight on the drill xy to control the system The outer housing is located in the outer casing, electronics package, electronic group, YY -hydraulic control valve system. The hydraulic control valve, Yt, contains: hydraulic control valve system and the hydraulic control valve system, Yo, to indicate the required lower pressure limit. Adjustable first set point ¥1 tubing in pipes drilling fluid hydraulic working pressure YV on the required upper limit Jul adjustable second set point for adjustment ALE and a point A second determinant, YA, in pipes, drilling fluid, hydraulic working pressure, for hydraulic pressure, ve, representing the pressure range, first and second set points, and the first and second set points, dubing © .drive motor, which is required for the working drive motor. pressure factor 10 in working pressure valve assembly positive stage of ©" valve group or cylinders to hydraulic control fluid and supply tubing ry Sal in Downhole direction axial force to sign the axial force piston assembly more in the piston group ve pressure becomes Laie weight-on-bit (WOB) weight on the drill 3343 downhole direction Yeo first set point less than the first set point sensed working pressure © working valve assembly passive stage negative stage YY going to hydraulic control fluid in tubes 8 and stopping hydraulic control fluid pressure TA hydraulically in the state piston assembly 08 m to close the piston assembly piston assembly YQ Y. When the weight-on-bit (WOB) passive state negative working pressure © sensed working pressure sensed working pressure; 1. drive motor Required for the drive motor working to consult the working pressure valve assembly reverse stage hydraulic control fluid and reverse the flow of the hydraulic control fluid tubing in the pipes pressure to sign Axial force piston assembly or more in the piston group cylinders going to a cylinder go weight-on- to reduce the weight on the drill drill bit in the opposite direction to pull the drill bit axial force £1 to the specified point sensed working pressure When the working pressure of the sensor reaches bit (WOB) "; or exceeds it. second set point A electronics where electronic group 1 according to the assembly protection element XO group in the cover transducer From a pressure-related input, it receives a pressure-related input package outer valve motor to send a signal to the valve motor outer housing v -hydraulic control valve system to convert the hydraulic control valve system housing ¢ active where the positive phase of valve group 1 according to the assembly assembly. 1 The stage passive stage valve assembly and the negative stage of the valve assembly cstage valve assembly pilot valve contains a reverse stage valve assembly ¥ pressure control valve and a pressure control valve; for Ble pilot valve according to the element of protection where the pilot valve assembly - 1.4 group 2-position four-way spool valve 1" ry where the hydraulic control valve system Fo Aleall of the Wy assembly element Group 00 1 three-position four-way pilot valve is a hydraulic control valve system directional valve. ov ae is a transducer According to the protection element ¥ where the transformer assembly LT 1 .torque transducer for rotation ¥ is the valve motor according to the protection element ¥ where the valve motor assembly WY 1 .6160016 motor electric motor ¥ electronics The electronic group Cua 1 according to the protection element assembly A drilling annulus all between a differential pressure input loop that receives a pressure differential input package to send a signal to a differential pressure transducer from a bore hole drilling jug 7 -hydraulic valve system to convert the hydraulic valve system motor; electronics engine where electronic group 1 according to the protection element assembly A000 anti-stall tool input sudden stop ate is transmitted through an input to a load tool that receives a package load cell from a load cell weight -on-bit (WOB) or anti-stall tool input " -hydraulic valve system to turn the hydraulic valve system motor; send signal to the electronics motor where electronic group 1 according to the protection element assembly Group 01.01 gold of the rotational deceleration input scale that receives the input to reduce the rotational speed package 7 to transform the hydraulic valve system motor to send a signal to the torsional accelerometer ¥ hydraulic valve system; YY 11.1 The group according to protection element 1, where the electronics package receives ¥ a change in voltage input to send a signal to an electric motor ¥ to transform the hydraulic valve system system 1.1 The group according to protection element 1, where the electronics package receives a “change in electric current input” to send a signal to an electric motor ¥ to transform the hydraulic valve system -hydraulic valve system ‎YoY.