About liner hangers and running tools
Liner hangers suspend a liner inside a parent casing string. Running tools provide the compatible installation interface, with associated setting and sealing components defined by the selected liner system.
Typical applications
Well construction and completion programmes use liner systems to extend tubular coverage through selected intervals. The well geometry and installation design establish the equipment arrangement.
Types and configuration choices
Parent casing and liner dimensions, loads, setting method and connections distinguish systems. Include running tools, accessories and support requirements when defining the package.
Parent casing and liner dimensions
Physical interfaces determine whether an item can be integrated into the installation. Drawings should identify the relevant dimensions, mating connections, access limits and drawing revision. Nominal sizes do not always describe actual clearances or connection geometry, so include the governing dimensional reference where available. For replacements, photographs can help identify the assembly, but an approved drawing or exact part reference is preferable for critical interfaces. Record any installation constraints that could affect assembly, maintenance access or the scope of associated fittings and supports.
Loads and well trajectory
Performance requirements should describe the intended operating cases rather than a single headline rating. State the units and distinguish normal demand from minimum, maximum and temporary conditions where they apply. Include the duration or frequency of intermittent duties, because a continuously operating assembly and an occasionally used one may need different configurations. Record which loads or consumers operate together. This provides a consistent basis for comparing proposals and helps identify whether an offer includes the full performance range required by the application.
Setting method
The required evidence should relate to the actual purpose of the item or assignment. Identify the method, acceptance basis and documents required by the project, including the relevant edition or revision where specified. A certificate title alone may not establish that the required scope or measurement range is covered. Distinguish manufacturer records, calibration results, inspection reports and specialist qualifications. State whether witnessing or independent review is required, and make the responsibility for evaluating the results clear before comparing technical and commercial proposals.
Cementing and running-tool scope
A clear scope describes the intended result and the responsibilities of the parties involved. List the required deliverables and identify which design or operating decisions have already been made. Separate investigation, engineering, supply, installation and acceptance activities where they are different work packages. State the review process and the information that will be provided by the buyer or operator. This allows proposals to address the same work and makes omissions or additional services visible before a commitment is made.
How related requirements differ
Completion packers and downhole valves: Completion packers isolate an annular space within the well, while downhole valves provide selected flow-control or protective functions. Both form part of a completion architecture with specific mechanical and control interfaces. Permanent or retrievable packers and different valve functions need distinct specifications. Tubular dimensions, setting arrangements, materials and required qualification guide selection.
Electric submersible and rod lift systems: Electric submersible pump systems use downhole electrically driven pumping assemblies. Rod-lift systems transmit mechanical motion from surface equipment to a downhole pump. Both are artificial-lift methods with different well and surface interfaces. ESP stages, motor and cable requirements differ from rod-string and surface-drive selections. Evaluate the complete system duty rather than an individual pump nameplate.
Gas lift and progressing cavity systems: Gas lift introduces gas through a designed completion arrangement to assist production. Progressing cavity pumps use rotor-and-stator geometry to move fluid. These artificial-lift methods have different energy sources and operating characteristics. Gas-lift valves and mandrels differ from PCP drive and pump components. The well schematic, performance data and surface interfaces define each equipment package.
Compare the complete supply scope
For liner hangers and running tools, compare the complete assembly and documented scope of supply. An offer for a component may exclude the drive, controls, fittings, accessories or inspection services needed for the installation. List exclusions and proposed alternatives so each quotation can be assessed against the same requirement. Manufacturing origin, delivery location and the supplier's business address are separate facts. If a particular origin is required, request confirmation for the actual offered item and the supporting documentation specified by your project.
Questions before requesting a quotation
What information should be available first? Start with the intended application and the current technical specification for liner hangers and running tools. In this category, the initial review includes parent casing and liner dimensions, loads and well trajectory, setting method, cementing and running-tool scope. Attach the relevant drawings or scope documents and identify any information still awaiting confirmation. This makes it possible to distinguish a preliminary enquiry from a fully defined purchasing or service requirement.
Can an alternative be accepted on size or price alone? A proposed alternative needs review against the required function, materials, interfaces and documented performance. Similar dimensions or a familiar brand name do not establish compatibility. State which requirements are mandatory and where an equivalent may be considered. Availability, lead time and supporting documents are confirmed for the actual offer rather than assumed from this catalogue.