Drilling

Please contact us if you would like to be added to the following list of suppliers: Coiled tubing completions: Camco, Nowcam, Otis Surface torsional vibration control: Bentec, Maritime Hydraulics, Tech Power Controls (TCP) Fishing: Baker Oil Tools, Red Baron Heave compensation: Maritime Hydraulics, Retsco Kick detection systems: BHI, Martin-Decker Totco, Thule Rigtech (Flow Compensation System) List of companies – Slim Hole Wells services

Most slim wells are drilled and completed with a down-sized conventional approach using completely conventional drilling rigs, or modified workover hoists, as this is the cheapest solution. The conventional rigs may be one or two sizes smaller than if the same well were full sized, and some of them will have a “Retrofit” package of Rigs for Slim Hole Drilling

Wells drilled using slim hole techniques are reducing initial drilling costs. The technology to conduct effective petrophysical evaluation in slim wells is available. Thus, slim hole development wells should be considered for many projects. Wells in fields will not flow at the rates traditionally required to justify subsea producers and smaller production conduit may be Completion technology for Slim hole wells

One of the applications of slim hole drilling technology is for low cost exploration and delineation wells. Slim wells from fixed rigs (land/jackup/swamp) can be drilled using the down-sized conventional or the continuous coring approach, but the testing procedures and tools are in principle similar. As with full sized wells, testing may be conducted in Production testing – Slim Hole Wells

Schlumberger has a set of 2 3/4″ diameter tools offering all services for 4 1/8″ holes. These tools have ratings of 175°C (350°F) and 137 MPa (20 kpsi) or better. The efforts to reduce micro-scanners and formation testers to less than 3 1/2″ have met with some success. For holes down to 4 1/8″ a Slim hole well wireline logging

All regular evaluation techniques such as wireline logging, MWD logging, mud logging, etc. may be used in slim wells. In addition on-site core evaluation is available commercially for continuously cored wells, this is covered in the overview. Mud logging is completely conventional for small wells. The only point of note is that the cost of Evaluation of slim hole wells

A number of small MWDs and steering tools are available, mainly intended for the horizontal sidetrack market. There are a number of small gyros which were designed to be run through conventional drillpipe. Dip-meters can be used as surveying instruments. Alternatives to surveying for cost-effective wells For many cost-effective vertical wells, surveying the well to Surveying Slim Hole Wells

Slimming down wells can have a substantial impact on the cost and size of wellheads, Xmas trees, and BOP stacks. As a rough guide the weight, size, and hence costs of these components is proportional to the square of the final hole size for a given well. When using the downsized conventional concept the use Wellheads, Xmas trees and BOPs for Slim Hole Wells

The Ingram Cactus Exact 15 Universal Slim-hole Drilling and Completion System was specifically developed for use with slim-hole casing designs suitable for installation through small bore BOP stacks (i.e. 7″, 9″ and 11″ through-bore sizes). One of the objectives in designing this system was to preserve all the design features developed in the standard Universal Ingram Cactus: Exact 15 Universal Slim-hole wellhead system

Main features of the MC2 compact wellhead are described below: Flow through casing hanger with 45 degree shoulders and centralisation feature. “Fastlock” hub and metal/metal “CX” gasket on wellhead connections. Non API shear and bending resistant outlets with parallel thread metal sealing VR plug. 2″ ´ 5000 psi outlets for both upper and lower stages. Cooper Oil Tools: MC2 compact wellhead