The packedhole assemblies contain three to five stabilizers properly spaced to maintain the angle. This paper covers decisions and actions being made to get a well with new casing design successfully drilled. Bottom hole assembly bha design for directional control. If the design uses an openstyle valve cage, it will provide less restriction during the pumping of heavy crude oils. But when you get near the bottom, many specialized tools are needed to successfully drill. The bha design objective for directional control is to provide the directional tendency that will match the planned trajectory of the well. The bottom hole assembly, or bha, is that portion of the drill string closest to the drill bit. This is a powerful and integrated development environment. Starting at the bottom, obviously, the bit is the first and most important part of the bottom hole assembly bha. Predicting bottomhole assembly performance journal article. The bottom hole assembly bha is the component of the drill string that includes the core bit, outer core barrel, various subs, and the drill collars. The pressure measured in a well at or near the depth of the producing formation.
Sep 10, 2014 bottomhole assembly bha design purpose components assemblies. The xquik xray part counter can count part size from 01005 and up. The lower portion of the drillstring, consisting of from the bottom up in a vertical well the bit, bit sub, a mud motor in certain cases, stabilizers, drill collar, heavyweight drillpipe, jarring devices jars and crossovers for various threadforms. It hangs below the drill pipe and provides weight to the drill or core bit to induce the teeth to penetrate the formation, thereby drilling a hole or recovering core to meet the scientific. The bottom hole assembly bha is a portion of the drillstring that affects the trajectory of the bit and, consequently, of the wellbore. As such bottom hole assembly bha design can vary greatly from simple vertical wells with little or now lwd requirements to complex directional wells which must run multicombo lwd suites. Bha design including bha reference and graphic drillingsoftware. The new technology drastically reduces the time required to count parts so that user can return part to stock in fraction of the time that is required today. Thruhole equipment printed circuit boards pcb assembly. In proteus we can design any circuit and simulate the circuit and make pcb layout for that circuit. When an assembly contains smt components top and bottom and through hole components on top, the assembly requires an extra epoxy process to solder the bottom side smt components.
Rotation ui, hole based move ui, move, rotate ui, select menu, information on selected part. The pressure, usually measured in pounds per square inch psi, at the bottom of the hole. The assembly tab is where the user assemble the robot in a virtual space. As these can fluctuate rather strongly, rotatingonbottom torque and drag data are not very meaningful in determining friction factors. Pcb layout design with proteus engineering technical pcbway.
The bha design is based upon the requirements of having enough weight transfer to the bit wob to be able to drill. Heavyweight drill pipe, which has the same outer diameter as regular drill pipe but with thicker walls for. This pressure may be calculated in a static, fluidfilled wellbore with the equation. The most common components of the bha are drill collars, stabilizers, shock absorbs, jars, reamers, heavy weight drill pipe and the drilling bit. For welltest purposes, it is often desirable to refer the pressure to a datum level chosen at a reference depth by calculating the pressure that would occur if the pressure measurement were made at the datum level rather than at the actual depth of the gauge. Method and system for designing bottom hole assembly. The bottom hole assembly bha is the component of the drill string that includes the core bit, outer core barrel, various subs, and. Engineers use dfa to reduce the assembly labor within a product through the consolidation of single function parts into more elegant, multifunctional designs. Predicting bottomhole assembly performance journal. Bottom hole assembly bha design for directional control petrowiki. Click the planar face approximately where you want to create the hole. Bha design including bha reference and graphic complete analysis for bottom hole assembly design bha design. Via a plated through hole used as a through connection for conductors from the component side to solder side of the board or an outer layer to an inner layer.
The intellijar software application will make recommendations regarding the appropriate placement of mechanical and hydraulic jars within a bottom hole assembly bha, based on the information you provide and using stabildrill best practices. The bha is attached to the bottom of a long string of pipe called the drill string. The success of any drilling operation especially directional drilling operations depends upon the selection and design of bottom hole assembly. Introduction the drillstring design is the mechanical linkage connecting the drillbit at the bottom of the hole to. This is the most efficient way to create and manage large. Today, the most common approach to directional bottom hole assembly bha design is a pragmatic method in which decisions and judgments about the bhas suitability, are based on previous experience. Top down and bottom up are the strategies which are widely used in various fields like architecture, programming a software, neuroscience, ecology and also for management and organization top down approach starts with entire system and it will be. At menengai, directional wells are kickedoff with a mud motor in the 12 hole section at a depth of 400m to about 500m. The program allows up to 4 sections of drill pipe, four sections of hwdp, and four sections of. Complete analysis for bottom hole assembly design bha design. All the layers are compressed to form a single multilayer pcb where all the layers are interconnected via copper plated holes. Introduction the drillstring design is the mechanical linkage connecting the drillbit at the bottom of the hole to the rotary drive system on the surface. For instance, mud motor failure can cause impact damage to a pdc bit.
With the aid of bhapro, users are able to optimize bha design, improve bha. Pcb manufacturing software assembly electronics for ems. Bha design including bha reference and graphic drilling software. Quotation and cost estimation report instantly receive a report containing component counts for top and bottom of the pc board broken down by smt, fine pitch, bgas, thruhole, etc. To configure the bottom hole assembly, design optimization software is used to help in mitigating cost and eliminating ineffective drilling operations. The biggest problem with bottom up design is that it is very easy to create circular rebuilds which are a killer, plus if you have a complex assembly it is easy to over look details, because youre designing the component off to the side and bringing it in, so what happens when you need a round widget instead of square, try that, go and make. By adhering to this rule the chance of recovery from a failure is maximised. The assembly can consist of drill collars, subs such as stabilizers, reamers, shocks, hole openers, and the bit sub and bit. A method for selecting a bottomhole assembly, including performing a. Electronic pcb manufacturing software for oem and contract emscem manufacturers from unisoft. Introduction to proteus proteus professional is a software combination of isis schematic capture program and ares pcb layout program. A nonported float valve nrv shall be installed in all bottom hole assemblies which are used in top. Bottomhole assembly bha design purpose components assemblies. Multiple esm loggers can be run in the drillstring at the same time.
The assembly may be designed for slight build or drop tendency to counteract formation tendencies. Rotatingonbottom data is dependent on the momentary rop, wob, and tob. Shock and vibration are identified as a cause of premature failure on drill bit and components in the bottom hole. Pcb design for manufacturability guidelines altron inc. May 22, 2016 top down and bottom up are the strategies which are widely used in various fields like architecture, programming a software, neuroscience, ecology and also for management and organization top down approach starts with entire system and it will be.
The degree of nonelastic behavior of the formation during impact of the bottom hole assembly with the hole wall is represented by a restitution coefficient. The assembly hole command lets you create holes going thru different parts. The assembly of drill pipe, sophisticated instruments and pipe called the bottomhole assembly, or bha, is the business end of the drilling rig. Bhapro bottom hole assembly model drilling software. The packed hole assemblies contain three to five stabilizers properly spaced to maintain the angle. We represent some of the top american, european and asian manufacturers including novastar, dektec and torch. The top and bottom layers look same as a double sided pcb but has staked layers on both sides of the core. For these designers, the solidworks application has the hole series tool. Bottomhole assembly bha components trican well service. The bottomhole assembly must provide force for the bit to break the rock weight on bit, survive a hostile mechanical environment and provide the driller with directional control of the well.
The main outputs are the side force and displacement graphics. Directional drilling requires specific bha bottom hole. A computerreadable medium including software that, when executed by a processor causes the processor to design a configuration of a bottom hole assembly including components that include at least one stabilizer, the bottom hole assembly being connected with a drill string that also includes a drill bit, the designing including. Plcc packages are not to be placed on the solder side of the board on mixed technology boards. A stateoftheart bha program enables many critical applications such as i designing a bha to optimize directional performance, ii optimizing stabilizer locations to minimize vibration and increase downhole tool reliability, and iii improving survey. Design and drawing of bottom hole assembly design and. The position of drill string can be changed to suite all well designs all dcs or all hwdp. The rugged and compact design allows the esm logger to be installed anywhere in the drillstring or bottom hole assembly.
A bottom hole assembly bha is a component of a drilling rig. Tools and techniques to minimize shock and vibration to. In order to make a usable hole in the earth, there has to be a connection from the rig to the ground and a way to remove the earth as you drill. Wellbore trajectory is controlled by the type of bottom hole assembly used and the weight on the bit. Bottom hole assembly bha design purpose components assemblies. To mitigate the issues, the bottom hole assembly bha behavior was modeled using a proprietary software for static and vibration analysis. You can use hole series to create an assembly feature which creates hole features in the components of the assembly some designers create holes using assembly features when they really should be creating hole features in the individual parts. Tools and techniques to minimize shock and vibration to the. The effects of rockbit interaction have also been incorporated. Prior to running a bha most oilfield service providers have software to model the bha behaviour such as the. A generic solution to bha bottomholeassembly modeling. During each stroke, the barrel rushes the liquid around the bottom of the pump causing the possibility of sand to stick to the pump inside the hole to reduce. The component parts can be archived in a library in one or more zw3d files.
This tool creates assembly feature holes, but the hole geometry is created in. Also, downhole tool measurements and data must be observed continuously to identify and record the behavior of the bottomhole assembly. Pcb manufacturing software assembly electronics for ems, cem. The assembly can consist of drill collars, subs such as stabilizers, reamers, shocks, holeopeners, and the bit sub and bit. The bottomhole assembly must provide force for the bit to break the rock weight on bit, survive a hostile mechanical environment and. It is the lowest part of the drill string, extending from the bit to the drill pipe. In a bottom up design, large or complex assemblies are broken down into smaller subassemblies and components. The finite element method is utilized to determine the transient dynamic behavior of a bottom hole assembly during drilling. Oftentimes the assembly includes a mud motor, directional drilling and measuring equipment, measurementswhiledrilling tools, logging whiledrilling.
The key issue during drilling was failure of measurement tools due to high vibration. Bhapro is a bottom hole assembly modeling software that calculates the stress and bha components under complex downhole. Their thruhole equipment was designed and built to provide economical solutions for low to medium volume through hole assembly. Bottom hole assembly bha modeling is always an essential part in directional drilling. This data is then used by process engineers or test engineers to program. Selection of optimum bottom hole assembly configuration using. Pdf implementation of a bottomhole assembly program.
With the aid of bhapro, users are able to optimize bha design, improve bha performance as well as reducing failure risks. Tools and techniques to minimize shock and vibration to the bottom hole assembly spring 2014 iii abstract when drilling a well there is a risk of serious damage caused by drillstring vibrations. For over 30 years unisoft has supplied electronics manufacturers with superior automation software at competitive prices to streamline production floors. For none complex wells an open holecased hole friction factor of 0. Bha is extremely important as it definitely has an impact on drill bit performance. Each component is designed as a separate part by one or more designers. Heavyweight drill pipe, which has the same outer diameter as regular drill pipe but with thicker walls for greater weight, used as a transition between drill. Add part, undo, redo, move robot to origin, move viewpoint to origin, snap onoff, grid onoff, help.
As such bottom hole assembly bha design can vary greatly from. Bha design for drilling strings includes bha graphics and critical bha designs for a bottom hole assembly including string harmonics, torque and drag. Proteus is design suit and pcb layout designing software. Bhapro is a bottom hole assembly modeling software that calculates the stress and bha components under complex downhole loading conditions. Gui program has been developed to predict and design the bottomhole assembly bha. The designs to achieve the directional target vary from one well to another depending on the formation being drilled. What is the difference between bottom up assembly and top. The program allows up to 4 sections of drill pipe, four sections of hwdp, and four sections of drill collars. Bha design 32 bit is a complete analysis for bottom hole assembly design bha design. Selection of optimum bottom hole assembly configuration. Bhapro is a bottom hole assembly modeling software that calculates the stress and bha components under complex. Prior to running a bha most oilfield service providers have software to.
The position of drill string can be changed to suite all well designs all dcs or all hwdp the program consists of a graphic design and all the critcal properties of your bha. Pcb unlimited offers a great selection of thruhole equipment including wave solder machines, solder fountains, lead formers and component counters we represent some of the top american, european and asian manufacturers including novastar, dektec and torch. Bottomhole assembly bha modeling is always an essential part in directional drilling. Heavyweight drill pipe is also important as it provides a flexible transition from the drill collars and drill pipe. The dfm software is then used to help the design engineer quickly compare the costs to produce each alternative. Click simple hole or hole wizard features toolbar, or click insert assembly feature hole, then simple or wizard. Set the options as needed in the hole propertymanager or hole wizard type propertymanager. Bhapro is a bottom hole assembly modeling software that calculates the.
The bottomhole assembly bha is the component of the drill string that includes the core bit, outer core barrel, various subs, and the drill collars. Rotation ui, holebased move ui, move, rotate ui, select menu, information on selected part. Their thru hole equipment was designed and built to provide economical solutions for low to medium volume through hole assembly. You could actually create holes for each part in the part design workbench, but the assembly hole command available in assembly design workbench creates holes more rapidly and more productively. It hangs below the drill pipe and provides weight to the drill or core bit to induce the teeth to penetrate the formation, thereby drilling a hole or recovering core to meet the scienti. The increased stiffness on the bha from the added stabilizers keeps the drillstring from bending or bowing and forces the bit to drill straight ahead. It is able to locate contact points between bha components and wellbore wall, and also identify critical rotary spe ed rpm to avoid detrimental vibrations. It hangs below the drill pipe and provides weight to the drill or core bit to induce the teeth to penetrate the formation, thereby drilling a. Bottom hole assembly and mud motor for directional drilling. The program consists of a graphic design and all the critcal properties of your bha hiresolution graphics can be used to build a professional bhs design graphic first use the input bha data button and enter your complete drilling string including the ancillary bottom hole assembly tools and equipment.