Method and system to assess unscrewing based on data on pipe dog pressure

FIELD: machine building.

SUBSTANCE: required values of detachment pressure are determined on the basis of rod size and/or pipe dog type. The upper and lower limits for permissible values of rod detachment pressure may be calculated on the basis of the required pressure of detachment and/or rod size. Values of rod detachment pressure below the lower limit and above the upper limit specify the necessity to analyse the rod condition in order to identify whether this rod may be used repeatedly. The values of rod detachment pressure may be recorded as data of detachment pressure for subsequent assessment, including detection of improper unscrewing of rods and poor condition of a well.

EFFECT: invention provides for identification of pipes that require replacement.

25 cl, 13 dwg

 

The technical field relates to inventions

The present invention generally relates to unscrewing the threaded rod that is extracted from oil wells or wells of another type. More specifically, the invention relates to methods of monitoring and evaluating the pressure by unscrewing the rods to facilitate classification of the rods and clogging of pores of the bottomhole zone.

The level of technology

Oil wells and many other types of wells often contain a wellbore lined with a steel casing. Casing pipe is the column pipe at each end are screw threaded for mutual connection with the group's pipe couplings with inside thread. The lower end of the casing perforated, to allow the oil, water, gas or other specific fluid to enter the interior of the casing string.

Inside the casing there is another column pipes connected with the help of a group of threaded pipe couplings. This inner column pipe, known as tubing, has a much smaller diameter than the casing. The fluid in the earth, passes through the perforations of the casing string and enters the annular space between the inner wall of the casing and the outer wall of the tubing. From this it follows that the liquid is forced itself through the holes in the pump-compressor pipe and then climbs pump-compressor pipe to ground level, provided that fluid is under enough pressure.

If the natural pressure of the fluid is insufficient, the lower part of the tubing set piston pump to push the liquid up the tube. On the ground level is set to drive reciprocating compressor to operate the piston pump through the last columns of the rod (or rods), which moves up and down inside the casing. Column rod usually consists of a separate one-piece rods, each end of which is threaded so that they can connect with threaded connections.

As the length of casing, tubing and sucker rods is often a thousand feet on the bottom of the well, it is very important to their appropriate connections have been properly tightened to avoid costly repairs and downtime. Pipe connection (i.e. the connection tubing and casing) and the connection rod is usually fixed by using a tool known as a pipe wrench. Different by design, the keys have a specific purpose, i.e. the fixing of the pipes or rods, but any kind of keys serve a common purpose - tightening one screw element relative to another. Keys are usually containing the hydraulic motor, which transmits torque to the band clamps pipe wrench, which capture the fixed element or elements.

When carrying out routine inspection or maintenance work on the section of the well sucker rods and tubing are removed from the well for analysis or determine the condition of the wellbore. When retrieving sucker rods and tubing from the well each rod and/or tube must be released from the coupling that connects one rod on the other. When did the releasing rod or pipe, the operator must determine whether the rod or tube can be reused or it is badly damaged. If the pump rod and/or tubing of poor quality, for example, have damaged the threads, they can pass the fluid and cause further destruction and the destruction of other components in the well. The loosening of rods and tubing can also serve as a forecast of future violations nipples rods or pipes. If loosening occurs at a pressure significantly above the required, that the reason for this may be a breach of the thread, which will restrict the ability of the rod to create the appropriate seal, if it is fastened and is returned into the well. On the other the second side, if loosening occurs when the pressure is significantly less than required, then the reason may be related to the operation of the pump or by the interaction of the rod/pump.

Developed various ways of control when you try to prove that the well repeatedly used sucker rods and tubing only good quality. However, operators and maintenance personnel of the rig are often within tight time frames when retrieving sucker rods and tubing, repair wells and re-launch of the equipment back into the well. In many cases, operators are too busy to give proper attention to the state of rods and tubes, which may already be damaged. There is therefore a need in the display system and the method of evaluation, which is the recording and analysis of pressure by loosening the rods and tubes, and a warning to the operator if pressure when unscrewing outside the desired range, thereby identifying those rods and pipes that are in the greatest need replacing.

The present invention is directed to solving these and similar problems in relation unscrewing the rods and pipes.

The invention

The way to evaluate the quality of the rod and the dynamic characteristics of the wellbore with whom keeps getting information about the size of the rod and the type of the key to retrieve the rod. The required pressure can be determined based on the size of the rod and the type of the key and entered in the computer system, which can be placed on the drilling rig. The upper and lower limits for acceptable pressure by unscrewing the rod can be calculated on the basis of the desired pressure unscrewing and/or size of the rod. The actual pressure unscrewing can be evaluated during removal of the rod from the well, sign up for graphic display and compared with the upper and lower limits of pressure. The pressure unscrewing less than the lower limit or above the upper limit causes the alarm, informing the operator of the drilling rig on the need to assess the state bar to determine whether the rod can be re-used. In addition, the graphical display will be able to provide the operator with information about the columns with pressure unscrewing above or below the desired range and will be able to report problems that are possible in the trunk very well. Also can be estimated pressure unscrewing the rods, in order to determine the average and average (mean) values of the pressure unscrewing, to determine the number of raskreplennye that occurred beyond the limits of the number of raskreplennye that occurred below the marginal rate is the total number of rods or tubes, retrieved from the wellbore.

In accordance with one aspect of the present invention a method of assessing the quality of the network pipe connections on the basis of the characteristics of unfastening includes obtaining the required pressure breaking pipe connections. Pipe connections can contain rods and tubes, and the pressure required unfastening is determined based on the size of the rods and tubes. The upper limit pressure unfastening can be obtained on the computer on the rig. The upper limit pressure unfastening can be determined based on the required pressure unfastening or can be entered by the operator or employee of a drilling rig. The actual value of the pressure unfastening each rod and couplings or pipes and couplings can be obtained and evaluated during the operation of the extraction well. These actual values of the pressure arrangement can then be compared with the upper limit pressure of the arrangement to determine whether the actual pressure value, the upper limit pressure unfastening.

In accordance with another aspect of the present invention a method of assessing the quality of pipe connections on the basis of the characteristics of unfastening includes obtaining the required pressure breaking pipe connections. Pipe connections can contain rods and pipes, the pressure required unfastening can be determined based on the size of the rods and tubes. The upper limit and the lower limit pressure unfastening can be defined on the computer on the rig. Any of the values of the upper and lower limits of the pressure can be determined based on the required pressure unfastening or it can be entered by the operator or employee of a drilling rig. The actual peak value for each rod and couplings or pipes and couplings can be obtained and evaluated during the procedure of extraction from the well. These actual peak pressure unfastening compared with the upper limit and the lower limit pressure of the arrangement to determine whether the actual peak pressure breaking above the upper limit or below the lower limit pressure unfastening. If the actual peak value is greater than the upper limit or below the lower limit, it may trigger the alarm, warning the operator that the pipe connections should be more carefully evaluated against defects.

In accordance with another aspect of the present invention a method of assessing the quality rods on the basis of the characteristics of unfastening includes receiving input information containing the size of the rod to be loaded in the column pipe. The upper and lower limits of pressure unfastening can be determined on the basis of the size of the rod and can be obtained on the computer or available through a computer on the rig, carries out the extraction of the rods. The actual maximum pressure value for unfastening each rod can be identified and evaluated during or after the procedure is retrieved from the well. These actual maximum pressure unfastening can be compared with the upper limit and the lower limit pressure of the arrangement to determine whether the actual maximum value of the pressure breaking above the upper limit of pressure unfastening or less than the lower limit pressure unfastening. If the actual maximum pressure value greater than the upper limit or below the lower limit, you can turn on the alarm, warning the operator that the bar should be more carefully evaluated in relation to defects. Is the inspection rod and the decision is made to reuse the rods in the well.

These and other objectives of the present invention are achieved by using visual reproduction, and method of analysis of data relating to the pressure of fastening rods and pipes.

Brief description of drawings

Figure 1 is a side view of the mobile drilling rig lifted with a crane in accordance with one implementation of the present invention;

figure 2 is a side view of the mobile drilling rig have the system removed with a crane in accordance with one implementation of the present invention;

figure 3 is an electrical diagram of the control circuit in accordance with one implementation of the present invention;

figure 4 illustrates the ascent and descent of the inner column tubing using a mobile unit for repair in accordance with one implementation of the present invention;

figure 5 illustrates one embodiment of the methodology of collecting information presented in tabular form in accordance with one implementation of the present invention;

6 is a front view of the operator in accordance with one implementation of the present invention;

7 is a block diagram of a system that monitors the set of pipe wrenches, fixing the column details elongated in accordance with one implementation of the present invention;

Fig is a side view of a set of pipe wrenches to secure the two rods in the coupling in accordance with one implementation of the present invention;

Fig.9 is a sectional view from the top of the pipe keys in accordance with a variant implementation, depicted in Fig;

figure 10 is a logical block diagram representing the process for determining whether researching rod at the proper pressure unfastening based on the pressure data is Luca, in accordance with one implementation of the present invention;

11 is a logical block diagram illustrating the process steps of the analysis rods and pressure data to determine potential causes of pressure unfastening outside the desired range in accordance with one implementation of the present invention;

Fig is a logical block diagram representing the steps of an alternative process for determining whether researching rod at the proper pressure unfastening based on the pressure data keys, in accordance with one implementation of the present invention; and

Fig is a diagram of a hydraulic pressure pipe wrench to determine whether the magnitude of the pressure arrangement for the rods within the predetermined range in accordance with one implementation of the present invention.

Detailed description of the invention

Next is a detailed description of examples of implementation variants of the invention with reference to the accompanying drawings. The embodiments of the invention are described in accordance with how they can be met. For clarity, not all features of actual embodiments described in this description. Experts understand that when you create a real constructive COI the log to achieve certain goals inventors should be taken some special solutions, such as the harmonization of business-related and system conditions that may vary from one embodiment to another. Furthermore, it should be taken into account that such development should be complex and require a large investment of time, but which are nonetheless established practice for professionals whose inventions bring certain benefits. Other aspects and advantages of various embodiments of the invention will be apparent from consideration of the following description and accompanying drawings. As references in the future mainly relate specifically to the rods or tubing in accordance with the description of the drawings, each reference should be understood in a broad sense, including rods, pipes, unless otherwise indicated.

Figure 1 shows the retractable Autonomous mobile unit 20 containing a frame 22 supported on wheels 24, a motor 26, a hydraulic pump 28, an air compressor 30, the first gear 32, the second gear 34, the lift 36, variable speed, block 38, a sliding crane 40, the first hydraulic cylinder 42, a second hydraulic cylinder 44, the first inverter 46, the monitor 48 and sliding the pedal 50.

The engine 26 selectively connects to the wheels 24 and lift 36 through gears 34 and 32, respectively. T is the train engine 26 drives the hydraulic pump 28 through line 29 and the air compressor 30 through the communication line 31. The compressor 30 actuates the pneumatic gripper (not shown), and pump 28 actuates a set of hydraulic tongs (not shown). The pump 28 actuates the cylinders 42 and 44, which respectively extend and rotate the crane 40 to choose to install a crane 40 is in its working position, as shown in figure 1, and in the lower position, as shown in figure 2. In the working position the crane 40 is directed upwards, but its longitudinal axis 54 is offset from the vertical at an angle 56. The angular offset provides access unit 38 to the wellbore 58 without interaction with the hinge 60 of the crane. Due to the angular offset of the frame 56 of the crane is no obstacle to high-speed equipment and moving numerous internal network segments pipes (known as the tube, the inner column pipe, sucker rods or tubing 62, hereinafter the "pipe" or "rod").

Individual segments of a network of pipes (column 62) and pump rod are fastened to each other by hydraulic keys. The term "water key"as used hereinafter refers to any hydraulic tool that can bind together two pipes or pump rod. For example, you can use a tool provided by the company B.J.Hughes, Houston, Texas. When a slave is the pump 28 starts a hydraulic motor (not shown) forward and backward through the valve. Essentially, the engine starts the drive sprocket, which rotates the element pipe wrench relative to the butt of the clip. Element and butt clip capture flat faces paired the couplings pump rods or columns 62 of the inner pipe according presents one implementation variant of the invention. However, it is well within the scope of the invention to have a rotating clamps pipe wrench or gripping device, which is pressed against the round tube (i.e., no planes), in principle, similar to the commonly used pipe wrench, but with a hydraulic clamp. The direction of rotation of the engine determines the Assembly or disassembly couplings.

On the drawings in detail, not shown, that when installing pipe segments 62 is used pneumatic wedge plate for gripping the pipe to support the pipe 62, while the next segment of pipe 62 is screwed with the use of pipe wrenches. The compressor 30 provides compressed air through the valve for quick fastening and release of pneumatic wedge die. The tank helps to maintain a constant air pressure. The pressure sensor delivers on the monitor 48 (3) signal, which implicitly indicates that the drilling rig 20 is in working condition.

Again referring to figure 1, it should be noted that the load, prilozhennij block 38, perceived clamping hydraulic Shoe 92, which supports the crane 40. Hydraulic Shoe 92 is in principle the piston in the cylinder (as an option - membrane) as it is provided by the company M.D.Totco, Cedar Park, Texas. Hydraulic pressure in the hydraulic Shoe 92 increases with increase in load to the block 38. Figure 3 the first Converter 46 converts the hydraulic pressure in the signal 94 DC voltage value 0-5 V, which is passed to the monitor 48. Alternatively, the first Converter 46 can convert hydraulic pressure into a 4-20 milliamps. The monitor 48 converts the signal 94 in digital form, stores it in the storage device 96, links it with the mark of real-time and transmits the data to the remote computer 100 or the computer 700 7 by wire system, modem, 98, line, T1 connection, WiFi or another device or data transmission method known to the specialists.

Figure 3 also shows the transducers 46 and 102 connected to the monitor 48. The Converter 46 shows the pressure on the left Shoe 92 and inverter 102 shows the pressure on the right Shoe 92. The generator 118, run the engine 26 provides an output voltage proportional to the motor speed. This output voltage is the applied voltage divider with two resistors, in order to apply a signal voltage of 0-5 VDC at point 120, and then is supplied to the amplifier 122. The generator 118 is only one of many different tachometers, which provide a feedback signal proportional to motor speed. Another example tachometer requires a motor 26 that runs the alternator and measure its frequency. The Converter 80 generates a signal proportional to the pressure of the hydraulic pump 28 and, therefore, proportional to the torque tube keys.

The circuit 124 telephone access related to "POCKET LOGGER" (portable recorder) Race Scientific, Inc. Charlotte, N.C., which has four input channels 126, 128, 130 and 132; a storage device 96 and clock 134. The circuit 124 periodically polls the inputs 126, 128, 130 and 132 on user-selectable sample rate; digitizes data reading; stores the digitized values, and saves the time of day when it was realized sample inputs. Professionals should take into account that the presence of a corresponding circuit can be queried any number of inputs, and data on the receipt can be transmitted immediately.

The operator of the computer 100 that is remote from the workplace, where the installation of 20 for repair of wells, accesses data stored in the circuit 124, using odama 98 PC and cell phone 136 or other known methods of information transmission. Phone 136 reads the data through the communication line 138 (phone industry standard RJ11) and transmits the data to the modem 98 using antennas 140 and 142, in another embodiment, data is transmitted using a cable modem or WiFi system (not shown). In one implementation of the present invention telephone 136 contains CELLULAR CONNECTION.TM (system cellular connection)provided by Motorola Incorporated of Schaumburg, W. (model S1936C for cellular transceivers series 11 and model S1688E for older cellular transceivers).

Some details on monitor 48 that it is important to note, is that access to it via modem makes the monitor 48 is practically inaccessible for the staff in the workplace. However, the system can be easily modified to provide staff the opportunity to handle or correct the data being transmitted. The amplifiers 122, 144, 146 and 148 create conditions for their input signals to provide corresponding inputs 126, 128, 130 and 132, having a suitable power range and amplitude. A sufficient amount of power required for the RC circuit 150, which within a short period (e.g., 2-10 seconds) maintain the amplitude of the inputs 126, 128, 130 and 132 even after the outputs of the inverters 46, 102 and 80 and the output of the generator 118 is reduced. This ensures the capture of short emission without domestic the sample and save the excess data. Source DC power 152 delivers a clean and precise excitation voltage to the inverters 46, 102 and 80, and also nourishes the circuit 124 corresponding voltage with a voltage divider 154 voltage. The pressure sensor 90 activates the power source 152 through the relay 156, the contacts of which are closed by the coil 160, excited by a battery 162, figure 4 presents the image of a mobile unit 20 for repair of wells, lowering the column pipe 62, as indicated by arrow 174 in figure 4.

Figure 5 depicts the methodology capture operation in the form of a table in accordance with one variant of the invention. According to figure 5, the operator first selects the ID of operations for his/her future work; if you select "GENERAL", then the operator must choose one of the provisions of the rig up/down, lifting/lowering tubing or sucker rods or the removal/lifting tubing and sucker rods (option not shown on figure 5). If you select ACTION: INTERNAL", then the operator must select the Assembly or disassembly of equipment for maintenance, long stroke, paraffin content, the mounting/Dismounting blowout preventer (THIEF), fishing in the well, Yas, swabbing, the flow in the barrel is quaini, drilling, wellbore cleanout, operations, plugging of wells, such as plug wells or pumping fluid, lifting pumps, installing/removing pipe anchors, setting/unsetting of the packer and carrying/lifting heavy-weight drill pipe and/or other devices. Finally, if you select ACTION: EXTERNAL", the operator must select the operations performed by a third party, such as the installation or removal of auxiliary equipment for repair, stir well, cementing, logging, perforating, or technical control wells, and other General maintenance performed by a third party. Once the operation is identified, it is classified. For all classifications, except for the classification TASK: ACTION, choose the ID of the deviations and then there is a classification using the classification tolerances.

6 is a view of an operator interface of the rig or the interface of the supervisor according to one implementation variant of the present invention. In accordance with 6 all that is required of the operator is that he or she enters the data from the operations in the computer 605. The operator can interact with the computer 605 through a variety of means, including keyboarding 625 or is using the touch screen 610. In one implementation, the touch screen display 610 software screen buttons, such as retrieving sucker rods or tubing from the wellbore 615 is provided to the operator, as shown in Fig.6, which allows the operator to easily choose an operation from the group of software buttons. For example, if the operator provided a display 610, depicted in Fig.6, upon arrival at the drilling site, the operator must first press the "INSTALLATION". Then the operator has to choose, for example, "DEVICE", "DEVICE support" or "THIRD PARTY". Then the operator must choose to have the operation or running, or excluded as described above. In addition, as shown in Fig.6, before retrieving (moving) 615 or lowering (install) rod 62, the operator can set upper and lower limit for the block 38 by pressing the setup up and setting down after movement of the block 38 in proper position.

Now refer to Fig.7, where in accordance with one implementation of the present invention shows a front view of the operator. Figure 7 presents the display 610 to monitor the operation of fixing the set of keys 712. On the display 610 includes a learn mode that allows you to tailor the display 610 to the distinctions of the major keys 712 and operating conditions. After time mode of study display 610 is transferred to the monitoring mode. The data obtained in the monitoring mode, are compared with those obtained in study mode, to determine whether there was any change during the operation of fastening.

Schematically pipe wrenches 712 represent different types of keys, including, but not limited to, keys for fastening rod, tubing or couplings. 7 keys 712 shown in the Assembly of columns of elongated elements 714, which schematically illustrate any elongated element threaded on the ends to connect the elements 714 with a series of threaded couplings 716. Examples of elongated elements 714 can serve without limitation, sucker rods, tubing and couplings. Keys 712 contain at least one set of clamping dies for gripping and rotation of one of the elongated element 714 relative to another, thereby screw it into the thread, at least one elongated element in the next coupling 716. The actuator 718 provides the rotation of the clamping plates. The actuator 718 depicted schematically and may represent different types of drives, and those that can make translational motion (for example, a piston/cylinder) or rotational and can be operated hydraulically, pneumatically and electrically.

In one variant of the invention, the display 610 includes an electrical circuit 720, which is electrically connected to the output 721 and four inputs. Schematically the electrical circuit 720 may be represented by any circuit adapted to receive the input signal and issuing a response at the output. Examples of this circuit 720 can be, without limitation computers, controllers with software control, schema, containing discrete electrical elements of the schema that contains the integrated circuit, and various combinations thereof.

The input circuit 720 according to a particular implementation variant contain the first entry 722 is electrically connected to the first sensor 724, a second input 726, electrically connected with the second sensor 728, entry 730 examination and entrance 732 permissible limit. However, it should be noted that use of the display with fewer inputs or other inputs than those used in this example within the scope of the invention.

In response to the rotational action or addictive keys 712 sensors 724 and 728 generate input signals 734 and 736, respectively. The term "rotational effect" refers to any kind of rotational motion of any element associated with the device key 712. Examples of such element may without limitation include gearboxes, clamping devices, sucker rods, couplings, and tubing. The term "addictive dei is a journey" refers to the force, applied when tightening threaded connections. Schematically depicted sensors 724 and 728 can be represented by a wide range of sensors that are responsive to rotational or torque keys 712. Examples of sensors 724 and 728 can serve without limiting the pressure sensor (for example, for the perception of the hydraulic pressure of the hydraulic cylinder, load cell (for example, for the perception of stress as the keys to developing torque), switch (for example, used as a counter for counting the number of passages of the gear teeth or used to detect the act of giving keys 712 at the beginning of the tightening of the joint); a Hall sensor, proximity switch or photoelectric eye (for example, used as a counter for counting the number of passing gear teeth); and the current sensor (for example, measurement of power or electric current supplied to the motor, when it serves as a driving device for keys 712).

Entrance 730 examination and entrance 732 permissible limit are user interface elements that allow the operator to affect the operation of the display 610 ways that will be explained below. The display 610 can be connected to the circuit 720, sensors 724, 728 and 730 and 732. In odnawiane the implementation of the display 610 provides the operator with graphical information; but experts it is clear that the display 610 may include without limitation a display with a touch screen, plotter, printer, or other device to create a graphical representation. The display 610 also includes a timer 725 connected with the circuit 720. The timer 725 may be any device that can apply to work with a computer, programmable logic controller or other control device to determine the total time from receipt of the input signal.

To illustrate the display 610 will be described with reference to the group of keys 812 pump rod, which is used for screwing the two sucker rods 838 and 840 in the coupler 842, as shown in Fig and 9. However, it should be emphasized that the display 610 can be used easily with other types of keys 812 to secure other types of elongated elements. In this example, the hydraulic motor 818 is the transmission device key 812. Engine 818 causes the rotation of the various gears of the drive mechanism 944, which rotates the upper row of terminals 946 relatively lower row of terminals 848. The upper clamps 946 adapted to grip the flat faces 860 pump rod 840 and the lower clamps 848 capture the flat faces 852 rod 838. Thus, since the upper clamps 946 rotate relative to the lower grippers 848, the top of the Yaya sucker rod 840 is rotated relative to the lower rod 838, what makes both rods 838 and 840 tightly in an intact sleeve 842.

In the example on Fig and 9 sensor 924 is a conventional pressure sensor in the hydraulic interaction with the engine 818, perceiving hydraulic pressure that actuates the motor 818. Hydraulic pressure increases with the amount of torque caused by keys 812, so that the sensor 924 generates the input signal 834, which is this torque. Engine 818 may also include a relief valve 892 pressure. Relief valve 892 pressure limits the pressure that is applied to the engine 818, thus helping to limit the extent of the connection to which it is possible to produce a puff. In one embodiment, the implement relief valve 892 pressure is adjustable with the aid of the known control devices, to be able to vary the amount of hydraulic pressure on the basis of various diameters ("size") and the quality of the rods and tubes.

Next will be described processes according to the options the implementation of the present invention with reference to figure 10-12. Certain steps are the following processes should definitely send others to the present invention operated in accordance with the description. However, the present invention is not ograniczenie is the order of the steps, if this order or sequence does not alter the operation of the present invention unwanted way. It is clear that some steps can be performed before other stages or after other steps or in parallel with other stages within the scope and essence of the present invention.

Refer now to figure 10, which shows a logical block diagram in accordance with one implementation of the present invention, illustrating a method 1000 of determining that the rod 838 versed with appropriate pressure unfastening evaluation based on the pressure data keys. According to figure 1, 7, 8, and 10, the method 1000 begins at the stage START and proceeds to step 1002, in which is received a message that the operator removes from the well 58 rod 838. In one embodiment, the message is received at the computer 605 by selecting the operator operation 615 retrieval on the display 610 or by using 625 keyboard, mouse, or display 610 is a touch screen display. At step 1004 requested size rod. In one embodiment, the implement bar size requested by the operator on the display 610. Standard dimensions of the rods are three quarters of an inch, seven-eighths inch and one inch. Information on the size of the rods is received at step 1006. Information on the size of the rods can be entered by the operator from polosukhina 625 computer 605.

In certain embodiments different types of keys can be used for different jobs. In these cases, it is necessary to provide information characterizing the operation of the keys 812 at the moment. In one embodiment, the implementation uses two different types of keys 812: Mark IV and Mark V stage 1008 is a request for information describing the key 812, which are used in the current work. In one implementation, the query is performed using the computer 605 on the display 610. At step 1010 from the operator is accepted information about the key type, for example, the computer 605 using the keypad 625, however, can also be used other known input devices in the computer. At step 1012 is determined by the pressure required unfastening. In one embodiment, the implementation of the required pressure unfastening is determined based on the key type and size of the rod. In another embodiment, the implementation of the required pressure unfastening based on the pressure required for proper screwing rod of a certain size with a certain type of keys 812, when the rod 838 lowered into the well 58. In another embodiment, the desired pressure unfastening stored in the computer 605 or in a place with access to the computer 605 to the Internet. Alternatively, the operator can enter the desired pressure breaking-based information is, specific rods 838, is lowered into the well 58, or on the basis of conventional rods 838 and keys 812 of the type which is used for retrieval operations.

At step 1014 the request is made to determine, have you changed the angle of the conical connection or bar size. Resizing the rod can affect the amount of the required pressure and, consequently, on the upper and/or lower limits of the pressure that you want to monitor. If the size of the rod or cone angle of the connection has not changed, the line "NO" leads to step 1020. In another case, if the size of the rod or cone angle of the connection has changed, the line "YES" leads to step 1016, where the information received about the new size of the rod or cone angle connection. In one implementation, this information is entered by the operator into the computer 605. At step 1018, the computer 605, the operator or other external object determines the required pressure for the new size of the rod or cone angle of the connection.

At stage 1020 is set to the upper limit pressure of the fastening rod. In one implementation, the upper limit pressure of the fastening rod is a given percentage above the required pressure of the fastening rod. The specified percentage may be 1-100% more than the required pressure rod. In most SL the teas specified percentage is 20-25%. In an alternative embodiment, the upper limit pressure of the fastening rod is given a constant value over the required pressure of the fastening rod, the specified constant value is 50-800 pounds per square inch ("psi") in excess of the desired pressure of the fastening rod. The upper limit can be set by the computer 605 on the basis of the input information or may be set by the operator by introducing the upper limit in the computer 605 using the keypad 625.

At step 1022 is set lower limit pressure of the fastening rod. In one embodiment, the implementation of the lower limit of the pressure of the fastening rod is a value less than the required pressure of the fastening rod to the specified percentage. The specified percentage may be 10-100% below the required pressure of the fastening rod. In an alternative embodiment, the lower limit pressure of the fastening rod is given a constant value below the required pressure of the fastening rod. The specified constant value is 50-800 psi below the required pressure of the fastening rod. The lower limit can be set by the computer 605 on the basis of input information, such as bar size and type of the key or can be set by the operator input lower limit in the computer 605 using the keypad 625.

Fig represents a graph 1300 depicting a General characteristic data gidravlicheskiy is th key press during operation of the extraction rod in accordance with one implementation of the present invention. Contact Fig. Graph 1300 is a graph 1305 hydraulic pressure, in which the X axis represents time and the Y axis represents the pressure in pounds per square inch. However, the choice of axes X and Y, and the method of image pressure is not limited to the shown on the chart 1305. Graph 1305 contains data 1310 hydraulic pressure, represented as a line on a graph 1305. However, the point on the line 1310 may also be submitted separately as clearly defined points that are not connected to form a line. Moreover, pneumatic pressure and other forms of energy known to specialists that can be measured and can vary depending on the amount of work that could replace the hydraulic pressure.

Graph 1305 includes pressure unfastening 1315, represented by a solid line 1000 psi, the upper limit pressure unfastening 1320 represented by a dotted line 1250 psi, and the lower limit pressure unfastening 1325, represented by a dotted border 750 psi. Data 1310 contain the peak value 1330 and failures. In one embodiment, the implementation deals with the case when the pressure of the arrangement is in the desired range, if the peak value 1330 is between the lower limit 1325 and the upper limit of 1320. As shown in the graph 1305, picoloinate 1330 significantly above the upper limit of 1320. In addition, the peak value 1335 less than the lower limit and will not be taken into account within range. In addition to analyzing the actual rods 838, based on the pressure unfastening, data 1310 may provide information about the state of the well 58. As will be described in more detail later, when certain sections of the column bars 62 exceeds the upper limit, while other areas are mostly within the range, it may indicate that there are problems with bore 58 on the plot on which are placed the rod 838 having a pressure breaking above the upper limit of 1320. For example, as shown in the graph 1305, to the point 24 a large part of the peak is within the desired range. However, after a period of 24 next peak value exceeds the upper limit of 1320. The computer 605 may detect these areas or areas where significantly exceeded the upper limit pressure of the fastening rod, and to notify that this part of the wells should be investigated before rod 838 will once again fall into the well 58.

Let us return to figure 10. At step 1028 is evaluated to determine whether the peak value of the hydraulic pressure greater than the upper limit or below the lower limit. In one embodiment, the implementation of this assessment is carried out to the computer 605 on the rig 20. Otherwise, the assessment may be carried out by another computer on the rig floor or a computer off-site. If the peak value of the hydraulic pressure greater than the upper limit or below the lower limit, the line "YES" leads to step 1030, where the signal is created alarm. The alarm may be audible, visual or both. Examples of the audio alarm can be, without limitation, hooters, sirens and whistles. Examples visual alarms are, without limitation, flash light, turning light, and messages that are displayed on the display 610 of the computer 605. The alarm can be triggered, even when the peak value of the hydraulic pressure is between the upper and lower limits. In these variants can be created in various types of alarms with different height of the sound depending on whether the peak value of the hydraulic pressure is less than the lower limit, above the upper limit or falls between the upper and lower limit.

Unfastening the individual rods 838 and/or peak value of the hydraulic pressure are analyzed to determine the causes of the output peak value of the hydraulic pressure within this range. In one embodiment of the invention the rod 838 checked for wear and damaged the I to determine the possibility of their reuse. The process continues from step to step 1032 1034.

Return to step 1028. If the peak value of the hydraulic pressure is not greater than the upper limit or below the lower limit, the line "NO" leads to step 1034. At step 1034 is a query whether another rod 838 be removed from the well 58. If so, the line "YES" leads back to step 1014. In another case, the line "NO" leads to step 1036, which gets averaged and the average values of pressure breaking for the complete removal of the rods 838 or rods 838 certain size. In one implementation, the average value may be calculated by dividing the sum of peak values of the hydraulic pressure to unlock each rod of a certain size on the number of operations for unfastening rods 838 of this size. Average values can be calculated using known methods using the same information above. In one embodiment, the implementation averaged and the average values computes the computer 605, but they can also be calculated by another computer or on the job site, or outside it.

At step 1038 calculates the number of rods 838 having a peak value of the hydraulic pressure above the limit during the procedure unfastening. In some embodiments, the computer 605 can use the counter in BP the two retrieval operations and to count the number of peak values above the upper limit. Possible option when the computer 605 upon completion of the extraction rod 838 can analyze data about hydraulic pressure during the operation of fastening and to count the number of peak values exceeding the upper limit. At step 1040 calculates the number of rods having a peak value of the hydraulic pressure is less than the lower limit during the operation of fastening. In some embodiments, the computer 605 can use the meter during the operation of fastening and to count the number of peak values less than the lower limit. Possible option when the computer 605 upon completion of the extraction rod 838 can analyze data about hydraulic pressure during the operation of fastening and to count the number of peak values less than the lower limit. At step 1042 calculates the total number of extracted rods 838 and the number of rods 838. In some embodiments, the computer 605 can use the meter during the operation of fastening and to count the number of peak values of the hydraulic pressure during the operation of breaking during retrieval operations. Possible option when the computer 605 upon completion of the extraction rod 838 can analyze data about hydraulic pressure during the operation of fastening and to count the total number of peak values of the hydraulic pressure during operas is the breaking when removing. In addition, because the computer 605 is capable of receiving data relating to the dimensions of the rods, during the extraction operation, the account can also be arranged on the sizes of the rods. The process continues from step 1042 to the stage of COMPLETION.

11 is a logical flowchart illustrating a method of study of rods and pressure data to determine potential problems, causing the peak value of the hydraulic pressure breaking above the upper limit or below the lower limit, as described in step 1032 figure 10 and 12. Now refer to figure 1, 6, 8, 10, 11 and 12. Method 1032 starts at step 1105, which asks whether the alarm if the pressure exceeds the upper limit. Professionals it is clear that the same operation may be based on the analysis of peak pressure unfastening regardless, made an emergency alarm or not. If there is no alarm for pressure exceeding the upper limit, the line "NO" leads to step 1135. In another case, the line "YES" leads to step 1110.

At step 1110 the request is made, exceeds all or a large part of the peak hydraulic pressure during the operation of fastening the upper limit for rods 838 removed from the well 58 during retrieval operations. In one VA is iante the implementation of this large part can be seventy-five percent and above, however, any value greater than fifty percent is within the scope of this invention. In some embodiments, such an assessment is carried out by the computer 605. If all or most of the peak pressure exceeds the upper limit, the line "YES" leads to step 1115, where it is determined that the rod 838 swiney at a pressure above the desired pressure of screwing up. The process then moves from step 1115 to step 1130.

Let's return to the query at step 1110. If all or most of the peak values of the hydraulic pressure does not exceed the upper limit, the line "NO" leads to step 1120. At step 1120 is a query whether the specified percentage of the maximum value of hydraulic pressure for rod 838 on a particular area of bore 58 is above the upper limit. For example, during the operation of fastening the peak value of the hydraulic pressure, in General, should be within the desired range below the upper limit and above the lower limit for most rods 838. Although along one particular stretch wells 58 ninety percent of peak pressure exceeds the upper limit. Therefore, almost all of the peak values of the pressure returned to within the desired range. Such pressure reading may indicate a problem in the well 58. In one embodiment, p is the realization of a given percentage may be any value, greater than sixty percent. If the specified percentage does not exceed the upper limit, the line "NO" leads to step 1130. In another case, the line "YES" leads to step 1125 where the computer 605 determines that there is a problem at the site of the well 58, from which data is retrieved rod 838.

At step 1130, the operator or other workers appreciate the pipe end with an external thread and the sleeve 842 for rod 838 to determine collapsed or deformed thread, is there corrosion on the threads, and whether the rod 838 be reused or must be replaced. The operator can also use the screw gauge, placing it around the thread to find out, not collapsed. The process continues from step 1130 to step 1034 figure 10, or step 1234 on Fig. At step 1135 is a request was made whether the alarm when the maximum value of the hydraulic pressure was less than the lower limit. With regard to step 1105, the experts it is clear that such an operation may be based on the analysis of the peak value of the hydraulic pressure during the operation of the arrangement, regardless of whether any alarm or not. If the alarm is not produced when the pressure is less than the lower limit, then the line of "NO" has to step 1034 figure 10 or 1234 on Fig. In another case, the line is A" leads to step 1140. At step 1140 determines the computer 605 that cause peak pressure may be the collision of sucker rods and pump and/or the stroke of the plunger pump of the liquid. The operator or other employees of the rig 20 is instructed to examine the condition of the pump to determine hit rod pump or shock plunger pump fluid. The process then moves from step 1140 to step 1034 figure 10 or step 1234 on Fig.

Now go back to Fig, where in accordance with one implementation of the present invention is depicted a logical flowchart illustrating an alternative method 1200 of determining, understood whether rod 838 with proper pressure unfastening evaluation based on the pressure data key. According to figure 1, 7, 8, and 12, the method 1200 begins with step START and proceeds to step 1202, in which is received a message that the operator pulls the rod 838 from the well 58. In one implementation, the message is entered on the computer 605 operator selects an operation 615 retrieval on the display 610 or with the help of 625 keyboard, mouse, or using the touch screen display, if the display 610 is a touch screen display. At step 1024 requested size rod. In one embodiment, the implement bar size requested by the operator on the display 610. Information on the size of the rod PR is focused on step 1206. Information on the size of the bar can be entered by the operator on the keyboard 626 computer 605.

At step 1208 is requested to provide information describing the keys 812 used in the current work. In one implementation, the request is made using the display 610 of the computer 605. At step 1210 the information received about the key type from the operator, for example, the computer 605 via the keypad 625, however, other input devices known in the field of application of computers, can also be used. At step 1212 is determined by the pressure required unfastening. In one embodiment, the implementation of the required pressure unfastening is determined based on the key type and size of the rod. In some embodiments, the desired pressure unfastening based on the pressure required for screwing properly rod of a certain size with key 812 of a certain type, when the rod 838 lowered into the well 58. In some embodiments, the desired pressure unfastening stored in the computer 605 or in a place accessible to the computer 605, for example, via the Internet. Alternatively, you may enter the required pressure on the basis of the information related to the specific rods 838, which are lowered into the well 58, or on the basis of conventional rods 838 and keys 812 of this type, which is used DL is the extract operation.

At step 1214 the request, does the angle of the conical connection or bar size. Resizing the rod may be changed to the desired pressure unfastening and, therefore, the upper and/or lower limits of the pressure that you want to monitor. If you don't change the size of the rod or cone angle connection, the line "NO" leads to step 1220. Conversely, if the size of the rod or cone angle of the connection change, the line "YES" leads to step 1216, in which information is received about the new size of the rod or cone angle connection. In one embodiment, this information is entered by the operator into the computer 605. At step 1218, the computer 605, the operator or other external object defines the desired pressure breaking for the new size of the rod or cone angle of the connection.

At step 1220 is set to the upper limit for the pressure of breaking the rod. In one embodiment, the upper limit pressure for unfastening rod is a specified percentage in excess of the desired pressure of fastening rods. The specified percentage may be 10-100% above the required pressure of fastening rods. Typically, the predetermined percentage is in the range of 20-25%. In an alternative embodiment, the upper limit pressure of the fastening rod is given a constant value in the range of 50-800 psi in excess of rebueno pressure of fastening rods. The upper limit can be set using the computer 605 on the basis of the input information or may be set by the operator by inputting the upper limit in the computer 605 using the keypad 625.

At step 1222, the computer 605 estimates of hydraulic pressure for keys 812 during the operation of fastening. At step 1224 is a query whether the hydraulic pressure is higher than the required level, but below the upper limit. If so, the line "YES" leads to step 1225, which is formed by the signal that the pressure is within the desired range. In various embodiments, the signal may be audible, visual or both. An example of audio signals can be, without limitation, the hooters, sirens and whistles. Examples of visual signals include, without limitation flashing light, turning light and message on the display 610 of the computer 605. At step 1226, the computer records the peak value of the pressure during the operation of fastening the rod 838.

Return to step 1224. If the pressure is not between the required level and the upper limit, the line "NO" leads to step 1228. At step 1228 the request, if the hydraulic pressure is higher than the upper limit. If the pressure does not exceed the upper limit, the line "NO" leads to step 1234. In another case, the line "YES" leads to catapu 1229, on which the computer 605 records the peak value of the hydraulic pressure exceeding the upper limit during the operation of fastening. At step 1230 generates a signal indicating that the hydraulic pressure exceeds the upper limit. In various embodiments, this signal may be audible, visual or both.

At step 1032 investigated unscrewed the rod or the peak value of the hydraulic pressure to determine the reasons for the range of peak values of the hydraulic pressure. In one embodiment, the rod 838 checked for wear and damage to determine the possibility of their reuse. The process continues from step to step 1232 1234. At step 1234 is the query whether another rod 838 be removed from the well 58. If so, the line "YES" leads back to step 1214. In another case, the line "NO" leads to step 1236, which gets low and medium pressure breaking for the complete removal of the rods 838 or rod of a certain size. In one embodiment, the average value can be calculated by dividing the sum of the peak values of pressure when securing each rod 838 certain size on the number of transactions unlock for this size rod 838. Average values can be calculated using known-the x means using the same information, above. In one embodiment, the computer 605 calculates the low and average values, however, low and average values can also be calculated by another computer or on the job site or outside it.

At step 1238, it calculates the number of bars with hydraulic pressure above the upper limit during the operation of fastening. In some embodiments, the computer 605 can use the meter during the operation of fastening and to count the number of peak values above the upper limit. In an alternative embodiment, the computer 605 after the extraction rods 838 can evaluate data from the hydraulic pressure during operation of fastening and to count the number of peak pressure exceeding the upper limit. At step 1240 calculates the total number of rods 838 extracted during the extraction operation, and the number of rods 838. In some embodiments, the computer 605 can use the meter during the operation of fastening and to count the number of peak values during extraction operations. In an alternative embodiment, the computer 605 after the extraction rods 838 can evaluate data from the hydraulic pressure during operations unfastening and count the total number of peak values. In addition, because the computer 605 may receive data relating to the dimensions of the Tang during the extraction operation, it can be arranged by rod size. The process then follows from step 1240 to step FINISH.

Although the invention is described with reference to preferred implementations of the invention, the experts it is clear that various modifications are possible within the scope of the invention. Therefore, the scope of the invention is determined from the following claims. From the preceding description it is clear that implementation of the present invention eliminated the disadvantage of the prototype. Professionals it is clear that the present invention is not limited to any specifically considered the use of, as well as what is described in this document, the embodiments are illustrative, and not restrictive. From the description of examples of implementation of the invention should, which is equivalent substitutes the elements described here can be offered by specialists, as well as how to create other options for implementing the present invention may be offered by practitioners in the art. Therefore, the scope of the present invention is limited only by the points of the following claims.

1. The way to evaluate the quality of pipes, based on the characteristics of breaking during removal of the tubing from the well, comprising determining the desired pressure unfastening, the distribution of the upper limit pressure unfastening, the determination of the actual pressure unfastening during the operation of fastening the pipe from the pipe string, and determining whether the actual pressure unfastening the upper limit pressure unfastening.

2. The method according to claim 1, which further generate alarms in case if the actual pressure unfastening exceeds the upper limit pressure unfastening.

3. The method according to claim 1, which further determines the size of the pipe that is subject to loosening during operation of the arrangement, and determine the pressure required unfastening on the basis of at least the size of the pipe.

4. The method according to claim 2, which further assess the position of the moving unit, where he assists in lifting the pipe string from the well, to determine whether the position of the movable unit to the position at which the releasing determine the maximum value of the actual pressure unfastening, while the movable block is in position in which is loaded, and does not move in the vertical direction, and determines whether the peak value of the pressure unfastening the upper limit pressure unfastening.

5. The method according to claim 1, which further record the actual pressure unfastening several operations rascal the deposits on the string of pipe and determine the average value of the actual pressure unfastening.

6. The method according to claim 1, which further record the actual pressure unfastening several operations unfastening the string of pipe and determine the number of cases exceeding the actual pressure upper limit pressure unfastening.

7. The method according to claim 1, which further record the actual pressure unfastening several operations unfastening the string of pipe and determine the number of tubes in each column on the basis of determining the number of operations of fastening to the pipe string.

8. The method according to claim 1, which further record the actual values of the pressure unfastening as data unfastening form the signal evaluation pipes on the basis of a positive decision that the actual pressure unfastening exceeds the upper limit pressure unlock, inspect the pipe to determine the repeatability of this pipe in the well and examine data unfastening order to determine the cause of the difference between the pressure of breaking the upper limit of the pressure of breaking.

9. The method according to claim 8, characterized in that the study data unfastening assess data unfastening determine whether the specified percentage of data unfastening the upper limit pressure breaking and forming the signal that the pipe in to the Onna pipes svinina when the pressure of screwing up above the required pressure unfastening.

10. The method according to claim 8, characterized in that the study data unfastening assess data unfastening determine whether the specified percentage of the specified sequence of values of actual pressure breaking below the upper limit pressure unfastening determine whether the specified percentage of a different sequence of values of actual pressure breaking above the upper limit of pressure unfastening, and forming the signal that should be analyzed area of the borehole corresponding to the location of most of the tubes containing the sequence of peak values of the actual pressure breaking above the upper limit of pressure unfastening.

11. The method according to claim 1, characterized in that the upper limit pressure unfastening is a specified percentage of the desired pressure unfastening.

12. Machine-readable media containing executable computer team for the implementation of phases provided for item 1.

13. The way to evaluate the quality of the pipe based on the characteristics of breaking during removal of the tubing from the well, comprising determining the desired pressure unfastening, defining the upper limit of the pressure unfastening, the definition of the lower limit pressure unfastening, determining the peak value of the actual D. the effect of breaking during the operation of fastening the pipe in the string of pipe, determining whether the peak value of the actual pressure breaking above the upper limit of pressure unfastening or less than the lower limit pressure of the breaking and formation of alarms based on a positive determination that the peak value of the actual pressure breaking above the upper limit or below the lower limit pressure unfastening.

14. The method according to item 13, which further receive input information on the size of the pipe to be loaded during the operation of fastening, determine the required pressure on the basis of the input information, determine the upper limit pressure unfastening based on the required pressure unfastening and define the lower limit pressure unfastening based on the required pressure unfastening.

15. The method according to 14, which further assess the position of the moving unit, wherein the unit assists in lifting the pipe string from the well, to determine whether the position of the movable unit to the position at which the releasing determine the peak value of the actual pressure unfastening, while the block is in position in which is loaded.

16. The method according to item 13, which further are recording the peak value fakticheskogo the pressure unfastening several operations unfastening the string of pipe and calculate the average peak pressure value unfastening.

17. The method according to item 13, which further write peak pressure unfastening several operations unfastening the string of rods, determine the number of peak values of the pressure breaking above the upper limit of pressure unfastening and determine the number of peak values of the pressure unfastening less than the lower limit pressure unfastening.

18. The method according to item 13, which further provide registration data about releasing that contains the maximum value of the actual pressure unfastening several operations unfastening the string of pipe, study data loaded to determine the reason that the actual pressure unfastening exceeds the upper limit pressure unfastening.

19. The method according to p, in which when studying data about releasing determine whether any given percentage of the data unfastening greater than the upper limit pressure unfastening, and forming the signal that pipe in the string of pipe was svinina with the column at a pressure of screwing up above the required pressure unfastening.

20. The method according to p, in which when studying data about releasing determine whether the specified percentage of the specified sequence of peak values of the actual pressure breaking below the upper limit pressure unfastening determine, is what I specified percentage of another sequence of peak values of the actual pressure breaking above the upper limit of pressure unfastening, and forming the signal that should be defined as the site of the wells corresponding to the location of the majority of pipes containing a different sequence of peak values of the actual pressure breaking above the upper limit of pressure unfastening.

21. The method according to p, in which when studying data about releasing determine whether the specified percentage of the peak value of the actual pressure of fastening to the pipe string below the lower limit of pressure unfastening, and generate a signal to evaluate the performance of the pump on the basis of a positive decision that a given percentage of the peak value of the actual pressure of fastening to the pipe string below the lower limit of pressure unfastening.

22. The way to evaluate the quality rods on the basis of the characteristics of breaking during removal of the column bars from a well, comprising receiving input information containing the size of the bar, subject to loosening during operation of the arrangement, the determination of the upper limit pressure unfastening based on the size of the rod, the definition of the lower limit pressure unfastening based on the size of the rod, the reception data containing the maximum value of the actual pressure unfastening during the operation of fastening on each rod, determining whether the peak value of the actual Yes the population is breaking above the upper limit or below the lower limit of pressure unfastening, the formation of the alarm on the basis of a positive decision, the peak value of the actual pressure breaking above the upper limit and below the lower limit of pressure unfastening, and inspection of the rod to determine the reusability of the pipe in the well.

23. The method according to item 22, which further record data about releasing that contains the maximum value of the actual pressure unfastening several operations unfastening on rods, study data loaded to determine the reason that the actual pressure unfastening exceeds the upper limit pressure unfastening.

24. The method according to item 23, which when studying data about releasing determine whether the percentage of data about breaking above the upper limit of pressure unfastening, and forming the signal that the rods were swiney when the pressure of screwing up above the required pressure of screwing up.

25. The method according to item 23, which when studying data about releasing determine whether a given sequence of peak values of the actual pressure breaking below the upper limit pressure unfastening determine whether there is another sequence of peak values of the actual pressure breaking above the upper limit of pressure unfastening, and form a signal which is that must be estimated area of the borehole corresponding to the location of a larger number of rods containing the sequence of peak values of the actual pressure breaking above the upper limit of pressure unfastening.



 

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4 dwg

FIELD: drilling equipment, particularly devices adapted to lower and lift drill string.

SUBSTANCE: device includes connection parts formed on drilling pipe sections, for instance as sleeve or male half of tool joint with tool-joint threads, rotary key for above members and supplementary means. Supplementary means have cavities with sensors and is built in drilling string. The means are also provided with detachable reinforcing clamp made as bails connected one to another. The bails are arch-shaped and plate-type and are pivotally connected one to another. Inner bail surfaces have extensions inserted in grooves formed in supplementary means so that groove dimensions correspond to that of bail extensions.

EFFECT: reduced size of lock connection and increased free space for measuring tools installation.

3 cl, 4 dwg

FIELD: mechanical engineering, particularly connecting or disconnecting drilling and casing pipe couplings or joints.

SUBSTANCE: key is divided into separate independent technological units and has upper and lower bodies with connectors in front parts thereof. Built in the front parts are toothed rotor wheels in which pipe clamping means are arranged. The key also has gear and intermediate gear assemblies, common drive to rotate and stop the pipes. The drive comprises differential and high-speed reduction gears with hydraulic motors. Upper body may be rotated about pipe clamping means axis to lift or lower thereof relative lower body. The body is provided with thread torqueing/loosening means, braking means and means to supply process lubricant to threaded nipple part of pipe to be screwed on. Lower body has thread torqueing/loosening means. The key also comprises positioner provided with horizontal and vertical key displacement mechanisms.

EFFECT: extended functional capabilities, reduced time to replace clamping members of upper and lower key executive tools and braking system members, increased reliability of device units, increased load-bearing capacity of pipe interlocks.

3 cl, 6 dwg

FIELD: mechanical engineering, particularly connecting or disconnecting pipe couplings or joints, spinning wrenches adapted to connect drilling and casing pipes.

SUBSTANCE: device comprises rotary gear with connector provided with pentahedral profile from inner side thereof and cartridge built in the pentahedral profile. The cartridge has upper and lower discs with four clamping means arranged between them in radial direction. The clamping means are made as shuttle mechanisms comprising bodies and jaws with hard-alloy dies. The bodies are built in guiding cartridges and may perform radial movement during rotary gear rotation. Movable pins are built in clamping device body. Projected pin ends mate projections made in cups. The cups are arranged between cartridge discs and provided with spring. Jaw with die is connected with the body by pin so that after pin disconnection the body may be removed from the guiding cartridge.

EFFECT: increased reliability along with increased load-bearing capacity.

2 cl, 3 dwg

FIELD: mechanical engineering, particularly drilling string and casing pipe connection equipment.

SUBSTANCE: method involves stopping one pipe and rotating another pipe for screwing and unscrewing of above pipes with the use of hydraulic drive and braking system to transmit differently directed torques with the same data along with reactive moment reduction by drive and braking system. Device comprises two coaxial power tongs. Each power tong includes body and pipe squeezing mechanism. The power tongs have common drive including high-speed reducer and differential block kinematically connected one to another. Differential block comprises body with outer and inner toothed crowns, planet carrier with three satellites installed on the carrier, the first tong arranged in body, driven gear kinematically connected to planet carrier and the second tong installed in the body and adapted to cooperate with corresponding gears of pipe squeezing mechanisms. Pipe squeezing mechanism of the first tong is fixedly secured to braking pulley of braking system installed on the first tong body. The braking system comprises four pressing shoes and cylindrical case with hydraulic cylinder for shoe pressing arranged so that cylindrical case may rotate with pulley and pipe squeezing mechanism of the first tong relative pipe squeezing mechanism axis. The cylindrical case is additionally provided with two rests. One rest is fixedly connected with cylindrical case and cooperates with two hydraulic cylinders, which are adapted for thread tightening/unfastening. Another rest is connected with cylindrical case by hinged axis and also cooperates with two other hydraulic cylinders, adapted for thread tightening/unfastening, which provides elimination of reverse reaction and increase of pipe squeezing mechanism torque and locking moment.

EFFECT: possibility to use one drive provided with differential gear to perform screwing/unscrewing operations.

2 cl, 2 dwg

FIELD: mechanical engineering, particularly means for connecting or disconnecting pipe couplings or joints.

SUBSTANCE: pipe wrench comprises body with openable flaps and locking mechanism, releasing rotor with jaws, braking means to provide automatic pipe clamping, hydraulic motor and tooth gears with satellites. The rotor comprises central and two side sectors. One side sector end has threaded orifice to receive regulator, which adjusts mutual sector location. The regulator is made as spherical threaded thrust having spherical part cooperating with end part of central rotor sector. Rotor-satellite spacing setting device, which specifies space between rotor and satellite axes is installed in wrench body. The spacing setting device is made as three cylindrical fingers cooperating with basic rotor surface and installed in threaded orifices formed in wrench body along longitudinal axis thereof. The fingers are also arranged in each openable flap at an angle to longitudinal axis.

EFFECT: increased operational reliability.

5 dwg

Tubular key // 2293837

FIELD: tubular keys.

SUBSTANCE: tubular key contains jaws with through grooves of "dovetail" type on end surface, replacement dies mounted therein, holders. On side surfaces of jaws, grooves of "dovetail" type are made, into which sliders are inserted for holding replacement dies along end surfaces. Through apertures are made in jaws, wherein spring-loaded holders for fastening sliders are inserted.

EFFECT: increased reliability of assembly for holding replacement dies of tubular key.

5 dwg

Machine spanner // 2295624

FIELD: deep drilling and maintenance of oil and gas wells.

SUBSTANCE: machine spanner contains greater and lesser jaws, jointly connected to handle-lever, which is provided with swivels for holding traction and insurance cables, holding toothed dies on aforementioned jaws, mounted in die holders, latch, jointly connected to larger jaw and adapted for interaction with lesser jaw. Larger jaw is made in form of one- or multi-layered (multi-row) packet of flexible resilient elements, on which a row of die holders is located. A packet of flexible resilient elements is made in form of highly durable ribbons or ropes, provided with eyes for connection of jaws to each other by means of fingers, and also with slit and handle-lever.

EFFECT: increased comfort of operation, decreased hazard of injury and increased lifetime.

4 cl, 7 dwg

FIELD: oil and gas well construction, particularly for casing pipes, flow strings and other technological pipes.

SUBSTANCE: pipe spinning-up method involves seating nipple end on one pipe in clutch end of another pipe, which is fixed from rotation; screwing-in nipple end of the first pipe into another one with increasing twisting moment; aligning mark formed on the first pipe with mark created on clutch end of another, fixed, pipe by rotation of nipple end of the first pipe as pipe ends touch each other; screwing-up nipple pipe end. Nipple pipe end at first is screwed-in by hand. Then above pipes are spun-up up to bringing clutch pipe end to level of transversal mark location on nipple pipe end or below above level. Screwing-up of nipple pipe end is carried out due to resilient deformation of thread members to obtain predetermined interference in threaded connection, seal belts and to achieve good air-tightness of pipe ends abutting each other by smooth shock free twisting moment increase at clutch end temperature of not more than 80°C up to bringing into register of nipple pipe end mark with additional mark formed at clutch end of fixed pipe and spaced apart from the first mark created on above pipe in pipe spinning-up direction, wherein the clutch pipe end is located at level of transversal mark formed at nipple pipe end or is below above end and spaced not more than 0.5 mm from above level.

EFFECT: possibility to demonstrate passed spinning-up stages and pipe assemblage termination due to provision of spaced marks bearing different information.

4 cl, 6 dwg

Sucker-rod tong // 2306403

FIELD: oil production, particularly Connecting or disconnecting pipe couplings or joints, namely means of mechanization of trips associated with sucker rods.

SUBSTANCE: sucker-rod tong comprises head with slot for sucker rod receiving and mounting orifices, handle connected to head to provide cooperation with carrier, fixer, which fixes tong engagement of sucker rod and torsion torque limiter, which limits torsion torque during sucker rod screwing together. Torsion torque limiter has torsion torque regulation means and includes resilient rod, clip and cutoff plate. Resilient rod is threadedly secured to box-like head and is off-centered with respect to sucker rod axis. Corner depression is formed at resilient rod end so that the depression is aligned with end thereof along depression radius. Roller secured to clip cooperates with the depression. Clip is installed on handle by means of pin and is spring-loaded towards handle pin as tong is installed in working position. Cutoff plate is installed on head. Cutoff plate has beveled part reverse to the corner depression of resilient rod. In working tong position roller of spring-loaded clip cooperates with the depression. Handle is supported by pin passing in mounting orifice of head and off-centered with respect to resilient rod and sucker rod axes.

EFFECT: improved operational conditions and decreased accident risk due to possibility to break mechanical connection between carrier and tong at predetermined tightening torque.

4 cl, 2 dwg

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