摘要:
Disclosed drilling systems offer multiple methods providing access to the open borehole without first tripping the drill string. In some embodiments, a drill bit has a tool port that is blocked by a plug during normal drilling operations. When a tool is deployed through the interior of the drill string, the tool port opens, enabling the tool to enter the borehole beneath the drill string and perform logging or sampling operations. The plug may be attached to the drill bit by a hinge or pivot, or alternatively, the plug may be discarded and a replacement seated in place after the tool is retracted into the drill string. In other embodiments, the drill bit itself is detachable, allowing the bit to be parked in the hole or in a side bore. If desired, the bit can be re-attached by lowering the drill string to the bottom of the hole.
摘要:
Disclosed drilling systems offer multiple methods providing access to the open borehole without first tripping the drill string. In some embodiments, a drill bit has a tool port that is blocked by a plug during normal drilling operations. When a tool is deployed through the interior of the drill string, the tool port opens, enabling the tool to enter the borehole beneath the drill string and perform logging or sampling operations. The plug may be attached to the drill bit by a hinge or pivot, or alternatively, the plug may be discarded and a replacement seated in place after the tool is retracted into the drill string. In other embodiments, the drill bit itself is detachable, allowing the bit to be parked in the hole or in a side bore. If desired, the bit can be re-attached by lowering the drill string to the bottom of the hole.
摘要:
A method of maintaining a desired temperature at a location in a well can include adjusting fluid circulation parameters, thereby reducing a difference between an actual temperature at the location and the desired temperature. A well system can include at least one sensor, an output of the sensor being used for determining a temperature at a location in a well, and a hydraulics model which determines a desired change in fluid circulation through the well, in response to the temperature at the location being different from a desired temperature at the location. Another method of maintaining a desired temperature at a location in a well can include adjusting a density, solids content and/or flow rate of a fluid circulated through the well, thereby urging a temperature at the location toward the desired temperature.
摘要:
A sample bottle assembly. At least some of the illustrative embodiments are apparatuses including a first drill collar that includes: a first outer surface; a pocket accessible through an aperture in the first outer surface; a bottle assembly disposed within the pocket; a first end-clamp coupled within a first recess disposed at an upper end of the pocket to at least partially retain the bottle assembly in the pocket; and a second end-clamp coupled within a second recess disposed at the lower end of the pocket to at least partially retain the bottle assembly in the pocket. The bottle assembly further includes: a sample bottle having an axial length; and a sleeve comprising a bore, the sample bottle received within the bore, and the sleeve has an axial length substantially the same as the sample bottle.
摘要:
Various logging-while-drilling (LWD) systems and methods provide resistivity logging coupled with deep detection of elongated anomalies at acute angles, enabling effective geosteering without disrupting drilling operations and without requiring intervention in the operations of the existing well. One LWD system embodiment employs a tool having tilted antennas as the transmitter and the receiver, where at least one of the antennas is placed in the vicinity of the bit, making it possible to detect existing wells at distances of 50-100 feet. In some cases, the detection distance is increased by enhancing the visibility of the existing well using a contrast fluid treatment on target well, either to fill the bore or to surround the well with treated cement or fluids that invade the formation. At least one inversion method separates the inversion of formation parameters from the inversion of parameters specifying distance, direction, and orientation of the existing well.
摘要:
In some embodiments, an apparatus comprises a tubular for downhole operations. The tubular comprises a bottomhole assembly. The bottomhole assembly comprises a first downhole tool having a first sensor that is to generate a first data, wherein a first entity is at least one of a controller or an owner of the first downhole tool. The bottomhole assembly comprises a second downhole tool having a second sensor that is to generate a second data, wherein a second entity is at least one of a controller or an owner of the second downhole tool. The first data and the second data are to be coded in a common format. The bottomhole assembly also comprises a processor to execute instructions to receive and process the first data and the second data.
摘要:
A multi-purpose downhole tool comprising packers for isolating an interval of a downhole formation traversed by a borehole to form a packed-off interval annulus. The tool further comprises a reversible pump and more than one interval access port located between the packers. The ports provide fluid communication with fluid in the packed-off interval annulus. The tool further comprises a fluid conduit system and valves for controlling fluid communication between the interval access ports and the reversible pump. The multi-purpose tool is capable of pumping from the packed-off interval annulus as well as pumping into or “through” the packed-off interval annulus for determining formation pressures as well as introducing well enhancement fluids downhole.
摘要:
Various embodiments include apparatus and methods to operate a tool downhole in a well, where the tool has an optical computation element to determine different properties of downhole structures. Such an optical computation element can be structured to provide optical analysis of fluid and material composition of the downhole environment associated with a drilling operation. The data measurements from the optical computation element can be used in a geosteering operation. Additional apparatus, systems, and methods are disclosed.
摘要:
A method of cleaning a well face during formation testing at a drill site is disclosed. A collection chamber disposed in a formation tester tool may be at least partially filled with cleansing fluid. The formation tester tool may be introduced into a wellbore and the cleansing fluid may be ejected through a probe coupled to the formation tester tool. The collection chamber may then be at least partially filled with a formation fluid sample. A face of the probe may be contacted by a retractable cleaning mechanism coupled to the formation tester tool.
摘要:
A disclosed fracture characterization method includes: collecting three-dimensional resistivity measurements of a volume surrounding an open borehole; analyzing the measurements to determine parameters describing fractures in the volume; and providing a report to a user based at least in part on said parameters. A fluid with a contrasting resistivity is employed to make the fractures detectable by a directional electromagnetic logging tool in the borehole. Illustrative parameters include fracture direction, height, extent, length, and thickness. The resistivity measurements can be augmented using a borehole wall image logging tool. Also disclosed are fracturing methods that include: positioning a directional electromagnetic logging tool proximate to a formation; fracturing the formation; monitoring fracture progression with said tool; and halting the fracturing when measurements by said tool indicate that a predetermined set of criteria have been satisfied.